Document:

EX-10.15

 Exhibit 10.15 

LOAN AND SECURITY AGREEMENT 

THIS LOAN AND SECURITY AGREEMENT (this “Agreement”) dated as of June 9, 2011 (the “Effective
Date”) between SILICON VALLEY BANK, a California corporation with a loan production office located at 275 Grove Street, Suite 2-200, Newton, Massachusetts 02466 (“Bank”), and ACACIA COMMUNICATIONS, INC., a
Delaware corporation (“Borrower”), provides the terms on which Bank shall lend to Borrower and Borrower shall repay Bank. The parties agree as follows: 

 

	 	1	ACCOUNTING AND OTHER TERMS 

 Accounting terms not defined in this Agreement shall
be construed following GAAP. Calculations and determinations must be made following GAAP. Capitalized terms not otherwise defined in this Agreement shall have the meanings set forth in Section 13. All other terms contained in this Agreement,
unless otherwise indicated, shall have the meaning provided by the Code to the extent such terms are defined therein. 
  

	 	2	LOAN AND TERMS OF PAYMENT 

 2.1 Promise to Pay. Borrower hereby
unconditionally promises to pay Bank the outstanding principal amount of all Credit Extensions and accrued and unpaid interest thereon as and when due in accordance with this Agreement. 

2.1.1 Revolving Advances. 

(a) Availability. Subject to the terms and conditions of this Agreement, Bank shall make Advances not exceeding the Availability
Amount. Amounts borrowed under the Revolving Line may be repaid and, prior to the Revolving Line Maturity Date, reborrowed, subject to the applicable terms and conditions precedent herein. 

(b) Termination; Repayment. The Revolving Line terminates on the Revolving Line Maturity Date, when the principal amount of all
Advances, the unpaid interest thereon, and all other Obligations relating to the Revolving Line shall be immediately due and payable. 

2.1.2 Letters of Credit Sublimit.  

(a) As part of the Revolving Line, Bank shall issue or have issued Letters of Credit denominated in Dollars or a Foreign Currency for
Borrower’s account. The aggregate Dollar Equivalent amount utilized for the issuance of Letters of Credit shall at all times reduce the amount otherwise available for Advances under the Revolving Line. The aggregate Dollar Equivalent of the
face amount of outstanding Letters of Credit (including drawn but unreimbursed Letters of Credit and any Letter of Credit Reserve) may not exceed the lesser of (A) One Hundred Thousand Dollars ($100,000.00), minus (i) the sum of all
amounts used for Cash Management Services, and minus (ii) the FX Reduction Amount, or (B) the lesser of the Revolving Line or the Borrowing Base, minus (i) the sum of all outstanding principal amounts of any Advances (including any
amounts used for Cash Management Services), and minus (ii) the FX Reduction Amount. 

 (b) If, on the Revolving Line Maturity Date (or the effective date of any termination of this
Agreement), there are any outstanding Letters of Credit, then on such date Borrower shall provide to Bank cash collateral in an amount equal to 105% (if the Letter of Credit is denominated in Dollars) or 110% (if the Letter of Credit is denominated
in a Foreign Currency) of the Dollar Equivalent of the face amount of all such Letters of Credit plus all interest, fees, and costs due or to become due in connection therewith (as estimated by Bank in its good faith business judgment), to secure
all of the Obligations relating to such Letters of Credit. All Letters of Credit shall be in form and substance acceptable to Bank in its sole discretion and shall be subject to the terms and conditions of Bank’s standard Application and Letter
of Credit Agreement (the “Letter of Credit Application”). Borrower agrees to execute any further documentation in connection with the Letters of Credit as Bank may reasonably request. Borrower further agrees to be bound by the
regulations and interpretations of the issuer of any Letters of Credit guaranteed by Bank and opened for Borrower’s account or by Bank’s interpretations of any Letter of Credit issued by Bank for Borrower’s account, and Borrower
understands and agrees that Bank shall not be liable for any error, negligence, or mistake, whether of omission or commission, in following Borrower’s instructions or those contained in the Letters of Credit or any modifications, amendments, or
supplements thereto. 
 (c) The obligation of Borrower to immediately reimburse Bank for drawings made under Letters of Credit shall be
absolute, unconditional, and irrevocable, and shall be performed strictly in accordance with the terms of this Agreement, such Letters of Credit, and the Letter of Credit Application. 

(d) Borrower may request that Bank issue a Letter of Credit payable in a Foreign Currency. If a demand for payment is made under any such
Letter of Credit, Bank shall treat such demand as an Advance to Borrower of the Dollar Equivalent of the amount thereof (plus fees and charges in connection therewith such as wire, cable, SWIFT or similar charges). 

(e) To guard against fluctuations in currency exchange rates, upon the issuance of any Letter of Credit payable in a Foreign Currency, Bank
shall create a reserve (the “Letter of Credit Reserve”) under the Revolving Line in an amount equal to ten percent (10%) of the face amount of such Letter of Credit. The amount of the Letter of Credit Reserve may be adjusted by
Bank from time to time to account for fluctuations in the exchange rate. The availability of funds under the Revolving Line shall be reduced by the amount of such Letter of Credit Reserve for as long as such Letter of Credit remains outstanding.

 2.1.3 Foreign Exchange Sublimit. As part of the Revolving Line, Borrower may enter into foreign exchange contracts with Bank under
which Borrower commits to purchase from or sell to Bank a specific amount of Foreign Currency (each, a “FX Forward Contract”) on a specified date (the “Settlement Date”). FX Forward Contracts shall have a Settlement
Date of at least one (1) FX Business Day after the contract date and shall be subject to a reserve of ten percent (10%) of each outstanding FX Forward Contract (the “FX Reserve”). The aggregate amount of FX Forward
Contracts at any one time may not exceed ten (10) times the lesser of (A) One Hundred Thousand Dollars ($100,000.00), minus (i) the sum of all amounts used for Cash Management Services, and minus (ii) the Dollar Equivalent of the
face amount of any outstanding Letters of Credit (including drawn but unreimbursed Letters of Credit and any Letter of Credit Reserve), or (B) the lesser of Revolving Line or the Borrowing Base, minus (i) the sum

  
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of all outstanding principal amounts of any Advances (including any amounts used for Cash Management Services), and minus (ii) the Dollar Equivalent of the face amount of any outstanding
Letters of Credit (including drawn but unreimbursed Letters of Credit and any Letter of Credit Reserve). The amount otherwise available for Credit Extensions under the Revolving Line shall be reduced by an amount equal to ten percent (10%) of
each outstanding FX Forward Contract (the “FX Reduction Amount”). Any amounts needed to fully reimburse Bank for any amounts not paid by Borrower in connection with FX Forward Contracts will be treated as Advances under the
Revolving Line and will accrue interest at the interest rate applicable to Advances. 
 2.1.4 Cash Management Services Sublimit.
Borrower may use the Revolving Line for Bank’s cash management services, which may include merchant services, direct deposit of payroll, business credit card, and check cashing services identified in Bank’s various cash management services
agreements (collectively, the “Cash Management Services”), in an aggregate amount not to exceed the lesser of (A) One Hundred Thousand Dollars ($100,000.00), minus (i) the Dollar Equivalent of the face amount of any
outstanding Letters of Credit (including drawn but unreimbursed Letters of Credit and any Letter of Credit Reserve), and minus (ii) the FX Reduction Amount, or (B) the lesser of Revolving Line or the Borrowing Base, minus (i) the sum
of all outstanding principal amounts of any Advances, minus (ii) the Dollar Equivalent of the face amount of any outstanding Letters of Credit (including drawn but unreimbursed Letters of Credit and any Letter of Credit Reserve), and minus
(iii) the FX Reduction Amount. Any amounts Bank pays on behalf of Borrower for any Cash Management Services will be treated as Advances under the Revolving Line and will accrue interest at the interest rate applicable to Advances. 

2.1.5 Growth Capital Advances. 

(a) Availability. Subject to the terms and conditions of this Agreement, during the Draw Period, Bank agrees to make up to three
(3) advances (each a “Growth Capital Advance” and collectively the “Growth Capital Advances”) available to Borrower in an amount not to exceed the Growth Capital Advance Amount. Each Growth Capital Advance must
be in an amount equal to at least One Million Dollars ($1,000,000.00). After repayment, no Growth Capital Advance may be reborrowed. Borrower may prepay any Growth Capital Advance at any time without premium or penalty. 

(b) Interest Period. Commencing on the first Payment Date of the month following the month in which the Funding Date for the applicable
Growth Capital Advance occurs, and continuing on the Payment Date of each month thereafter, Borrower shall make monthly payments of interest, in arrears, on the principal amount of each Growth Capital Advance at the rate set forth in
Section 2.3(a)(ii). 
 (c) Repayment. Commencing on April 2, 2012 and continuing on each Payment Date thereafter, Borrower
shall repay each Growth Capital Advance in (i) thirty-six (36) equal monthly installments of principal, plus (ii) monthly payments of accrued interest at the rate set forth in Section 2.3(a)(ii). All outstanding principal and
accrued and unpaid interest under the Growth Capital Advances and all other outstanding Obligations with respect to the Growth Capital Advances, are due and payable in full on the Growth Capital Maturity Date. 

  
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 2.2 Overadvances. If, at any time, the sum of (a) the outstanding principal amount of
any Advances (including any amounts used for Cash Management Services), plus (b) the face amount of any outstanding Letters of Credit (including drawn but unreimbursed Letters of Credit and any Letter of Credit Reserve), plus (c) the FX
Reduction Amount exceeds the lesser of either the Revolving Line or the Borrowing Base, Borrower shall immediately pay to Bank in cash such excess. 

2.3 Payment of Interest on the Credit Extensions. 

(a) Interest Rate. 
 (i)
Advances. Subject to Section 2.3(b), the principal amount outstanding under the Revolving Line shall accrue interest at a floating per annum rate equal to one and one half of one percentage point (1.50%) above the Prime Rate, which
interest shall be payable monthly in accordance with Section 2.3(f) below. 
 (ii) Growth Capital Advances. Subject to
Section 2.3(b), the principal amount outstanding for each Growth Capital Advance shall accrue interest at a floating per annum rate equal to three percentage points (3.0%) above the Prime Rate, which interest shall be payable monthly in
accordance with Section 2.3(f) below. 
 (b) Default Rate. Immediately upon the occurrence and during the continuance of an
Event of Default, Obligations shall bear interest at a rate per annum which is five percentage points (5.00%) above the rate that is otherwise applicable thereto (the “Default Rate”) unless Bank otherwise elects from time to
time in its sole discretion to impose a smaller increase. Fees and expenses which are required to be paid by Borrower pursuant to the Loan Documents (including, without limitation, Bank Expenses) but which are not paid when due shall bear interest
until paid at a rate equal to the highest rate applicable to the Obligations. Payment or acceptance of the increased interest rate provided in this Section 2.3(b) is not a permitted alternative to timely payment and shall not constitute a
waiver of any Event of Default or otherwise prejudice or limit any rights or remedies of Bank. 
 (c) Adjustment to Interest Rate.
Changes to the interest rate of any Credit Extension based on changes to the Prime Rate shall be effective on the effective date of any change to the Prime Rate and to the extent of any such change. 

(d) Computation; 360-Day Year. In computing interest, the date of the making of any Credit Extension shall be included and the date of
payment shall be excluded; provided, however, that if any Credit Extension is repaid on the same day on which it is made, such day shall be included in computing interest on such Credit Extension. Interest shall be computed on the basis of a
360-day year for the actual number of days elapsed. 
 (e) Debit of Accounts. Bank may debit any of Borrower’s deposit accounts,
including the Designated Deposit Account, for principal and interest payments or any other amounts Borrower owes Bank when due. These debits shall not constitute a set-off. 

(f) Interest Payment Date. Unless otherwise provided, interest is payable monthly on the Payment Date. 

  
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 2.4 Fees. Borrower shall pay to Bank: 

(a) Revolving Line Commitment Fee. A fully earned, non-refundable commitment fee of Twelve Thousand Five Hundred Dollars ($12,500.00)
on the Effective Date (the “Revolving Line Commitment Fee”); 
 (b) Growth Capital Line Commitment Fee. A fully
earned, non-refundable commitment fee of Seven Thousand Five Hundred Dollars ($7,500.00) on the Effective Date (the “Growth Capital Line Commitment Fee”); 

(c) Good Faith Deposit. Borrower has paid to Bank a deposit of Ten Thousand Dollars ($10,000.00) (the “Good Faith
Deposit”) to initiate Bank’s due diligence review process. Any portion of the Good Faith Deposit not utilized to pay Bank Expenses will be applied towards the Revolving Line Commitment Fee and/or the Growth Capital Line Commitment Fee;

 (d) Letter of Credit Fee. Bank’s customary fees and expenses for the issuance or renewal of Letters of Credit, upon the
issuance of such Letter of Credit, each anniversary of the issuance during the term of such Letter of Credit, and upon the renewal of such Letter of Credit by Bank; and 

(e) Bank Expenses. All Bank Expenses (including reasonable attorneys’ fees and expenses for documentation and negotiation of this
Agreement) incurred through and after the Effective Date, when due. 
 2.5 Payments. All payments (including prepayments) to be made
by Borrower under any Loan Document shall be made in immediately available funds in U.S. Dollars, without setoff or counterclaim, before 12:00 p.m. Eastern time on the date when due. Payments of principal and/or interest received after 12:00 p.m.
Eastern time are considered received at the opening of business on the next Business Day. When a payment is due on a day that is not a Business Day, the payment shall be due the next Business Day, and additional fees or interest, as applicable,
shall continue to accrue until paid. 
  

	 	3	CONDITIONS OF LOANS 

 3.1 Conditions Precedent to Initial Credit Extension.
Bank’s obligation to make the initial Credit Extension is subject to the condition precedent that Bank shall have received, in form and substance satisfactory to Bank, such documents, and completion of such other matters, as Bank may reasonably
deem necessary or appropriate, including, without limitation: 
 (a) duly executed original signatures to the Loan Documents; 

(b) duly executed original signatures to the Control Agreements; 

(c) Borrower’s Operating Documents and a long-form good standing certificate of Borrower certified by the Secretary of State of the State
of Delaware as of a date no earlier than thirty (30) days prior to the Effective Date; 

  
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 (d) Secretary’s Corporate Borrowing Certificate; 

(e) Certificates of Foreign Qualification of Borrower (as applicable), certified by the applicable secretary of state as of a date no earlier
than thirty (30) days prior to the Effective Date; 
 (f) certified copies, dated as of a recent date, of financing statement searches,
as Bank shall request, accompanied by written evidence (including any UCC termination statements) that the Liens indicated in any such financing statements either constitute Permitted Liens or have been or, in connection with the initial Credit
Extension, will be terminated or released; 
 (g) the Perfection Certificate of Borrower, together with the duly executed original signature
thereto; 
 (h) a landlord’s consent in favor of Bank for 3 Clock Tower Place, Suite 210, Maynard, Massachusetts 01754, by the
respective landlord thereof, together with the duly executed original signatures thereto; 
 (i) a legal opinion of Borrower’s counsel
dated as of the Effective Date together with the duly executed original signature thereto; 
 (j) evidence satisfactory to Bank that the
insurance policies required by Section 6.5 hereof are in full force and effect, together with appropriate evidence showing lender loss payable and/or additional insured clauses or endorsements in favor of Bank; and 

(k) payment of the fees and Bank Expenses then due as specified in Section 2.4 hereof. 

3.2 Conditions Precedent to all Credit Extensions. Bank’s obligations to make each Credit Extension, including the initial Credit
Extension, is subject to the following conditions precedent: 
 (a) except as otherwise provided in Section 3.4, timely receipt
of an executed Payment/Advance Form; 
 (b) the representations and warranties in this Agreement shall be true, accurate, and complete in
all material respects on the date of the Payment/Advance Form and on the Funding Date of each Credit Extension; provided, however, that such materiality qualifier shall not be applicable to any representations and warranties that already are
qualified or modified by materiality in the text thereof; and provided, further that those representations and warranties expressly referring to a specific date shall be true, accurate and complete in all material respects as of such date, and no
Event of Default shall have occurred and be continuing or result from the Credit Extension. Each Credit Extension is Borrower’s representation and warranty on that date that the representations and warranties in this Agreement remain true,
accurate, and complete in all material respects; provided, however, that such materiality qualifier shall not be applicable to any representations and warranties that already are qualified or modified by materiality in the text thereof; and
provided, further that those representations and warranties expressly referring to a specific date shall be true, accurate and complete in all material respects as of such date; and 

(c) in Bank’s reasonable discretion, there has not been any material impairment in the general affairs, management, results of operation,
financial condition or the prospect of repayment of the Obligations, or any material adverse deviation by Borrower from the most recent business plan of Borrower presented to and accepted by Bank. 

  
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 3.3 Covenant to Deliver. Borrower agrees to deliver to Bank each item required to be
delivered to Bank under this Agreement as a condition precedent to any Credit Extension. Borrower expressly agrees that a Credit Extension made prior to the receipt by Bank of any such item shall not constitute a waiver by Bank of Borrower’s
obligation to deliver such item, and the making of any Credit Extension in the absence of a required item shall be in Bank’s sole discretion. 

3.4 Procedures for Borrowing. 

(a) Advances. Subject to the prior satisfaction of all other applicable conditions to the making of an Advance set forth in this
Agreement, to obtain an Advance (other than Advances under Sections 2.1.2 or 2.1.4), Borrower shall notify Bank (which notice shall be irrevocable) by electronic mail, facsimile, or telephone by 12:00 p.m. Eastern time on the Funding Date of the
Advance. Together with any such electronic or facsimile notification, Borrower shall deliver to Bank by electronic mail or facsimile a completed Payment/Advance Form executed by a Responsible Officer or his or her designee. Bank may rely on any
telephone notice given by a person whom Bank believes is a Responsible Officer or designee. Bank shall credit Advances to the Designated Deposit Account. Bank may make Advances under this Agreement based on instructions from a Responsible Officer or
his or her designee or without instructions if the Advances are necessary to meet Obligations which have become due. 
 (b) Growth
Capital Advances. Subject to the prior satisfaction of all other applicable conditions to the making of a Growth Capital Advance set forth in this Agreement, to obtain a Growth Capital Advance, Borrower must notify Bank (which notice shall be
irrevocable) by electronic mail or facsimile no later than 12:00 p.m. Eastern time three (3) Business Days before the proposed Funding Date. The notice shall be a Payment/Advance Form, must be signed by a Responsible Officer or designee. If
Borrower satisfies the conditions of each Growth Capital Advance, Bank shall disburse such Growth Capital Advance by transfer to the Designated Deposit Account. 
  

	 	4	CREATION OF SECURITY INTEREST 

 4.1 Grant of Security Interest. Borrower
hereby grants Bank, to secure the payment and performance in full of all of the Obligations, a continuing security interest in, and pledges to Bank, the Collateral, wherever located, whether now owned or hereafter acquired or arising, and all
proceeds and products thereof. 
 4.2 Priority of Security Interest. Borrower represents, warrants, and covenants that the
security interest granted herein is and shall at all times continue to be a first priority perfected 

  
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security interest in the Collateral (subject only to Permitted Liens that may have superior priority to Bank’s Lien under this Agreement). If Borrower shall acquire a commercial tort claim,
Borrower shall promptly notify Bank in a writing signed by Borrower of the general details thereof and grant to Bank in such writing a security interest therein and in the proceeds thereof, all upon the terms of this Agreement, with such writing to
be in form and substance reasonably satisfactory to Bank. 
 If this Agreement is terminated, Bank’s Lien in the Collateral shall
continue until the Obligations (other than inchoate indemnity obligations) are repaid in full in cash. Upon payment in full in cash of the Obligations and at such time as Bank’s obligation to make Credit Extensions has terminated, Bank shall,
at Borrower’s sole cost and expense, release its Liens in the Collateral and all rights therein shall revert to Borrower. 
 4.3
Authorization to File Financing Statements. Borrower hereby authorizes Bank to file financing statements, without notice to Borrower, with all appropriate jurisdictions to perfect or protect Bank’s interest or rights hereunder, including a
notice that any disposition of the Collateral, by either Borrower or any other Person, shall be deemed to violate the rights of Bank under the Code. Such financing statements may indicate the Collateral as “all assets of the Debtor” or
words of similar effect, or as being of an equal or lesser scope, or with greater detail, all in Bank’s discretion. 
  

	 	5	REPRESENTATIONS AND WARRANTIES 

 Borrower represents and warrants as follows: 

5.1 Due Organization, Authorization; Power and Authority. Borrower and each of its Subsidiaries are duly existing and in good standing
as Registered Organizations in their respective jurisdictions of formation and are qualified and licensed to do business and are in good standing in any jurisdiction in which the conduct of their business or their ownership of property requires that
they be qualified except where the failure to do so could not reasonably be expected to have a material adverse effect on Borrower’s business. In connection with this Agreement, Borrower has delivered to Bank a completed certificate signed by
Borrower, entitled “Perfection Certificate”. Borrower represents and warrants to Bank that (a) Borrower’s exact legal name is that indicated on the Perfection Certificate and on the signature page hereof; (b) Borrower is an
organization of the type and is organized in the jurisdiction set forth in the Perfection Certificate; (c) the Perfection Certificate accurately sets forth Borrower’s organizational identification number or accurately states that Borrower
has none; (d) the Perfection Certificate accurately sets forth Borrower’s place of business, or, if more than one, its chief executive office as well as Borrower’s mailing address (if different than its chief executive office);
(e) Borrower (and each of its predecessors) has not, in the past five (5) years, changed its jurisdiction of formation, organizational structure or type, or any organizational number assigned by its jurisdiction; and (f) all other
information set forth on the Perfection Certificate pertaining to Borrower and each of its Subsidiaries is accurate and complete (it being understood and agreed that Borrower may from time to time update certain information in the Perfection
Certificate after the Effective Date to the extent permitted by one or more specific provisions in this Agreement). If Borrower is not now a Registered Organization but later becomes one, Borrower shall promptly notify Bank of such occurrence and
provide Bank with Borrower’s organizational identification number. 

  
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 The execution, delivery and performance by Borrower of the Loan Documents to which it is a party
have been duly authorized, and do not (i) conflict with any of Borrower’s organizational documents, (ii) contravene, conflict with, constitute a default under or violate any material Requirement of Law, (iii) contravene, conflict
or violate any applicable order, writ, judgment, injunction, decree, determination or award of any Governmental Authority by which Borrower or any of its Subsidiaries or any of their property or assets may be bound or affected, (iv) require any
action by, filing, registration, or qualification with, or Governmental Approval from, any Governmental Authority (except such Governmental Approvals which have already been obtained and are in full force and effect) or (v) constitute an event
of default under any material agreement by which Borrower is bound. Borrower is not in default under any agreement to which it is a party or by which it is bound in which the default could reasonably be expected to have a material adverse effect on
Borrower’s business. 
 5.2 Collateral. Borrower has good title to, has rights in, and the power to transfer each item of the
Collateral upon which it purports to grant a Lien hereunder, free and clear of any and all Liens except Permitted Liens. Borrower has no deposit accounts other than the deposit accounts with Bank, the deposit accounts, if any, described in the
Perfection Certificate delivered to Bank in connection herewith, or of which Borrower has given Bank notice and taken such actions as are necessary to give Bank a perfected security interest therein. The Accounts are bona fide, existing obligations
of the Account Debtors. 
 The Collateral is not in the possession of any third party bailee (such as a warehouse) except as
otherwise provided in the Perfection Certificate. None of the components of the Collateral shall be maintained at locations other than as provided in the Perfection Certificate or as permitted pursuant to Section 7.2. 

All Inventory is in all material respects of good and marketable quality, free from material defects. 

Borrower is the sole owner of the Intellectual Property which it owns or purports to own except for (a) non-exclusive licenses granted to
its customers in the ordinary course of business, (b) over-the-counter software that is commercially available to the public, and (c) material Intellectual Property licensed to Borrower and noted on the Perfection Certificate. Each Patent
which it owns or purports to own and which is material to Borrower’s business is valid and enforceable, and no part of the Intellectual Property which Borrower owns or purports to own and which is material to Borrower’s business has been
judged invalid or unenforceable, in whole or in part. To the best of Borrower’s knowledge, no claim has been made that any part of the Intellectual Property violates the rights of any third party except to the extent such claim would not
reasonably be expected to have a material adverse effect on Borrower’s business. 
 Except as noted on the Perfection Certificate,
Borrower is not a party to, nor is it bound by, any Restricted License. 

  
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 5.3 Accounts Receivable. For any Eligible Account in any Borrowing Base Certificate, all
statements made and all unpaid balances appearing in all invoices, instruments and other documents evidencing such Eligible Accounts are and shall be true and correct and all such invoices, instruments and other documents, and all of Borrower’s
Books are genuine and in all respects what they purport to be. Whether or not an Event of Default has occurred and is continuing, Bank may notify any Account Debtor owing Borrower money of Bank’s security interest in such funds and verify the
amount of such Eligible Account. All sales and other transactions underlying or giving rise to each Eligible Account shall comply in all material respects with all applicable laws and governmental rules and regulations. Borrower has no knowledge of
any actual or imminent Insolvency Proceeding of any Account Debtor whose accounts are Eligible Accounts in any Borrowing Base Certificate. To the best of Borrower’s knowledge, all signatures and endorsements on all documents, instruments, and
agreements relating to all Eligible Accounts are genuine, and all such documents, instruments and agreements are legally enforceable in accordance with their terms. 

5.4 Litigation. There are no actions or proceedings pending or, to the knowledge of the Responsible Officers, threatened in writing by
or against Borrower or any of its Subsidiaries involving more than, individually or in the aggregate, Fifty Thousand Dollars ($50,000.00). 

5.5 Financial Statements; Financial Condition. All consolidated financial statements for Borrower and any of its Subsidiaries delivered
to Bank fairly present in all material respects Borrower’s consolidated financial condition and Borrower’s consolidated results of operations as of the date or for the period indicated therein, subject to customary year end adjustments.
There has not been any material deterioration in Borrower’s consolidated financial condition since the date of the most recent financial statements submitted to Bank. 

5.6 Solvency. The fair salable value of Borrower’s assets (including goodwill minus disposition costs) exceeds the fair value of
its liabilities; Borrower is not left with unreasonably small capital after the transactions in this Agreement; and Borrower is able to pay its debts (including trade debts) as they mature. 

5.7 Regulatory Compliance. Borrower is not an “investment company” or a company “controlled” by an “investment
company” under the Investment Company Act of 1940, as amended. Borrower is not engaged as one of its important activities in extending credit for margin stock (under Regulations X, T and U of the Federal Reserve Board of Governors). Borrower
has complied in all material respects with the Federal Fair Labor Standards Act. Neither Borrower nor any of its Subsidiaries is a “holding company” or an “affiliate” of a “holding company” or a “subsidiary
company” of a “holding company” as each term is defined and used in the Public Utility Holding Company Act of 2005. Borrower has not violated any laws, ordinances or rules, the violation of which could reasonably be expected to have a
material adverse effect on its business. None of Borrower’s or any of its Subsidiaries’ properties or assets has been used by Borrower or any Subsidiary or, to the best of Borrower’s knowledge, by previous Persons, in disposing,
producing, storing, treating, or transporting any hazardous substance other than legally. Borrower and each of its Subsidiaries have obtained all consents, approvals and authorizations of, made all declarations or filings with, and given all notices
to, all Government Authorities that are necessary to continue their respective businesses as currently conducted, except as would not be reasonably expected to have a material adverse effect on Borrower’s business. 

  
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 5.8 Subsidiaries; Investments. Borrower does not own any stock, partnership interest or
other equity securities except for Permitted Investments. 
 5.9 Tax Returns and Payments; Pension Contributions. Borrower has
timely filed all required tax returns and reports, and Borrower has timely paid when due and payable or duly filed all valid extensions in connection therewith all foreign, federal, state and local taxes, assessments, deposits and contributions owed
by Borrower. Borrower may defer payment of any contested taxes, provided that Borrower (a) in good faith contests its obligation to pay the taxes by appropriate proceedings promptly and diligently instituted and conducted, (b) notifies
Bank in writing of the commencement of, and any material development in, the proceedings, (c) posts bonds or takes any other steps required to prevent the governmental authority levying such contested taxes from obtaining a Lien upon any of the
Collateral that is other than a “Permitted Lien”. Borrower is unaware of any claims or adjustments proposed for any of Borrower’s prior tax years which could result in additional taxes becoming due and payable by Borrower. Borrower
has paid all amounts necessary to fund all present pension, profit sharing and deferred compensation plans in accordance with their terms, and Borrower has not withdrawn from participation in, and has not permitted partial or complete termination
of, or permitted the occurrence of any other event with respect to, any such plan which could reasonably be expected to result in any liability of Borrower, including any liability to the Pension Benefit Guaranty Corporation or its successors or any
other governmental agency. 
 5.10 Use of Proceeds. Borrower shall use the proceeds of the Credit Extensions as working
capital and to fund its general business requirements and not for personal, family, household or agricultural purposes. 
 5.11
Full Disclosure. No written representation, warranty or other statement of Borrower in any certificate or written statement given to Bank pursuant to this Agreement, as of the date such representation, warranty, or other statement was made,
taken together with all such written certificates and written statements given to Bank, contains any untrue statement of a material fact or omits to state a material fact necessary to make the statements contained in the certificates or statements,
in light of the circumstances in which they were made, not misleading (it being recognized by Bank that the projections and forecasts provided by Borrower in good faith and based upon reasonable assumptions are not viewed as facts and that actual
results during the period or periods covered by such projections and forecasts may differ from the projected or forecasted results). 

5.12 Definition of “Knowledge.” For purposes of the Loan Documents, whenever a representation or warranty is made to
Borrower’s knowledge or awareness, to the “best of Borrower’s” knowledge, or with a similar qualification, knowledge or awareness means the actual knowledge, after reasonable investigation, of the Responsible Officers.

  
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	 	6	AFFIRMATIVE COVENANTS 

 Borrower shall do all of the following: 

6.1 Government Compliance. Maintain its and all its Subsidiaries’ legal existence and good standing in their respective
jurisdictions of formation and maintain qualification in each jurisdiction in which the failure to so qualify would reasonably be expected to have a material adverse effect on Borrower’s business or operations. Borrower shall comply, and have
each Subsidiary comply, with all laws, ordinances and regulations to which it is subject, noncompliance with which could have a material adverse effect on Borrower’s business. 

6.2 Financial Statements, Reports, Certificates. Deliver to Bank: 

(a) Borrowing Base Reports. Within thirty (30) days after the last day of each month, aged listings of accounts receivable and
accounts payable (by invoice date) (the “Borrowing Base Reports”); 
 (b) Borrowing Base Certificate. Within thirty
(30) days after the last day of each month and together with the Borrowing Base Reports, a duly completed Borrowing Base Certificate signed by a Responsible Officer; 

(c) Monthly Financial Statements. As soon as available, but no later than thirty (30) days after the last day of each month, a
company prepared consolidated balance sheet and income statement covering Borrower’s consolidated operations for such month certified by a Responsible Officer and in a form acceptable to Bank (the “Monthly Financial
Statements”); 
 (d) Monthly Compliance Certificate. Within thirty (30) days after the last day of each month and
together with the Monthly Financial Statements, a duly completed Compliance Certificate signed by a Responsible Officer, certifying that as of the end of such month, Borrower was in full compliance with all of the terms and conditions of this
Agreement, and such other information as Bank may reasonably request; 
 (e) Annual Audited Financial Statements. As soon as
available, but no later than one hundred eighty (180) days after the last day of Borrower’s fiscal year, audited consolidated financial statements prepared under GAAP, consistently applied, together with an unqualified opinion on the
financial statements from an independent certified public accounting firm acceptable to Bank in its reasonable discretion (the “Audited Financial Statements”); provided however that Bank will waive the requirements of this
Section 6.2(e) if the Board determines, in its reasonable discretion, not to pursue an audit during any given fiscal year, and Bank will accept in place of the Audited Financial Statements unaudited financial statements as prepared by Borrower;

 (f) Other Statements. Within ten (10) days of delivery, copies of all material statements, reports and notices made available
to Borrower’s security holders or to any holders of Subordinated Debt; 
 (g) SEC Filings. In the event that Borrower becomes
subject to the reporting requirements under the Exchange Act within five (5) days of filing, copies of all periodic and other reports, proxy statements and other materials filed by Borrower with the SEC, any Governmental Authority succeeding to
any or all of the functions of the SEC or with any national securities exchange, or distributed to its shareholders, as the case may be. Documents 

  
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required to be delivered pursuant to the terms hereof (to the extent any such documents are included in materials otherwise filed with the SEC) may be delivered electronically and if so
delivered, shall be deemed to have been delivered on the date on which Borrower posts such documents, or provides a link thereto, on Borrower’s website on the Internet at Borrower’s website address; 

(h) Legal Action Notice. A prompt report of any legal actions pending or threatened in writing against Borrower or any of its
Subsidiaries that could result in damages or costs to Borrower or any of its Subsidiaries of, individually or in the aggregate, Fifty Thousand Dollars ($50,000) or more; 

(i) Board-Approved Projections. As soon as available, but no later than the first Business Day of the calendar month following the
calendar month in which the Board approval occurred, but at least annually, and contemporaneously with any updates or changes thereto, Board-approved financial projections as to the following fiscal year, in a form of presentation reasonably
acceptable to Bank; and 
 (j) Other Financial Information. Other financial information reasonably requested by Bank. 

6.3 Inventory; Returns. Keep all Inventory in good and marketable condition, free from material defects. Returns and allowances between
Borrower and its Account Debtors shall follow Borrower’s customary practices as they exist at the Effective Date. Borrower must promptly notify Bank of all returns, recoveries, disputes and claims that involve more than Three Hundred Thousand
Dollars ($300,000). 
 6.4 Taxes; Pensions. Timely file, and require each of its Subsidiaries to timely file, all required tax
returns and reports and timely pay, and require each of its Subsidiaries to timely pay, all foreign, federal, state and local taxes, assessments, deposits and contributions owed by Borrower and each of its Subsidiaries, except for deferred payment
of any taxes contested pursuant to the terms of Section 5.9 hereof, and shall deliver to Bank, on demand, appropriate certificates attesting to such payments, and pay all amounts necessary to fund all present pension, profit sharing and
deferred compensation plans in accordance with their terms. 
 6.5 Insurance. Keep its business and the Collateral insured for
risks and in amounts standard for companies in Borrower’s industry, stage of development and location and as Bank may reasonably request. Insurance policies shall be in a form, with companies, and in customary amounts that are reasonably
satisfactory to Bank. All property policies shall have a lender’s loss payable endorsement showing Bank as lender loss payee and waive subrogation against Bank and shall provide that the insurer must give Bank at least twenty (20) days
notice before canceling, amending, or declining to renew its policy. All liability policies shall show, or have endorsements showing, Bank as an additional insured, and all such policies (or the loss payable and additional insured endorsements)
shall provide that the insurer shall give Bank at least twenty (20) days notice before canceling, amending, or declining to renew its policy. At Bank’s request, Borrower shall deliver certified copies of policies and evidence of all
premium payments. Proceeds payable under any policy shall, at Bank’s option, be payable to Bank on account of the Obligations. If Borrower fails to obtain insurance as required under this Section 6.5

  
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or to pay any amount or furnish any required proof of payment to third persons and Bank, Bank may make all or part of such payment or obtain such insurance policies required in this
Section 6.5, and take any action under the policies Bank deems prudent. 
 6.6 Operating Accounts. 

(a) Maintain all of its and all of its Subsidiaries’ operating, depository, and securities accounts with Bank and Bank’s Affiliates.

 (b) Provide Bank five (5) days prior written notice before establishing any Collateral Account at or with any bank or financial
institution other than Bank or Bank’s Affiliates. For each Collateral Account that Borrower at any time maintains, Borrower shall cause the applicable bank or financial institution (other than Bank) at or with which any Collateral Account is
maintained to execute and deliver a Control Agreement or other appropriate instrument with respect to such Collateral Account to perfect Bank’s Lien in such Collateral Account in accordance with the terms hereunder which Control Agreement may
not be terminated without the prior written consent of Bank. The provisions of the previous sentence shall not apply to deposit accounts exclusively used for payroll, payroll taxes and other employee wage and benefit payments to or for the benefit
of Borrower’s employees and identified to Bank by Borrower as such. 
 6.7 Protection of Intellectual Property Rights. 

(a) (i) Protect, defend and maintain the validity and enforceability of its Intellectual Property in a manner consistent with prudent business
practices; (ii) promptly advise Bank in writing of material infringements of its Intellectual Property of which Borrower becomes aware; and (iii) not allow any Intellectual Property material to Borrower’s business to be abandoned,
forfeited or dedicated to the public without Bank’s written consent, which consent shall not be unreasonably withheld. 
 (b) Provide
written notice to Bank within ten (10) days of entering or becoming bound by any Restricted License (other than over-the-counter software that is commercially available to the public). Borrower shall take such steps as Bank reasonably requests
to obtain the consent of, or waiver by, any person whose consent or waiver is necessary for (i) any Restricted License to be deemed “Collateral” and for Bank to have a security interest in it that might otherwise be restricted or
prohibited by law or by the terms of any such Restricted License, whether now existing or entered into in the future, and (ii) Bank to have the ability in the event of a liquidation of any Collateral to dispose of such Collateral in accordance
with Bank’s rights and remedies under this Agreement and the other Loan Documents. 
 6.8 Litigation Cooperation. From the date
hereof and continuing through the termination of this Agreement, make available to Bank, without expense to Bank, Borrower and its officers, employees and agents and Borrower’s books and records, to the extent that Bank may deem them reasonably
necessary to prosecute or defend any third-party suit or proceeding instituted by or against Bank with respect to any Collateral or relating to Borrower. 

  
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 6.9 Further Assurances. Execute any further instruments and take further action as Bank
may reasonably request to perfect or continue Bank’s Lien in the Collateral or to effect the purposes of this Agreement. 
  

	 	7	NEGATIVE COVENANTS 

 Borrower shall not do any of the following without
Bank’s prior written consent: 
 7.1 Dispositions. Convey, sell, lease, transfer, assign, or otherwise dispose of (collectively,
“Transfer”), or permit any of its Subsidiaries to Transfer, all or any part of its business or property, except for Transfers (a) of Inventory in the ordinary course of business; (b) of worn-out or obsolete Equipment;
(c) in connection with Permitted Liens and Permitted Investments; and (d) of non-exclusive licenses, joint ventures, strategic alliances, collaborative transactions, partnerships or similar transactions for the use of the property of
Borrower or its Subsidiaries in the ordinary course of business. 
 7.2 Changes in Business, Management, Ownership, or Business
Locations. (a) Engage in or permit any of its Subsidiaries to engage in any business other than the businesses currently engaged in by Borrower and such Subsidiary, as applicable, or reasonably related thereto; (b) liquidate or
dissolve; or (c) (i) have a change in senior management; or (ii) enter into any transaction or series of related transactions in which the stockholders of Borrower who were not stockholders immediately prior to the first such
transaction own more than forty-nine percent (49%) of the voting stock of Borrower immediately after giving effect to such transaction or related series of such transactions (other than by the sale of Borrower’s equity securities in a
public offering or to venture capital investors so long as Borrower identifies to Bank the venture capital investors prior to the closing of the transaction and provides to Bank a description of the material terms of the transaction). 

Borrower shall not, without at least thirty (30) days prior written notice to Bank: (1) add any new offices or business locations,
including warehouses (unless such new offices or business locations contain less than Ten Thousand Dollars ($10,000) in Borrower’s assets or property) or deliver any portion of the Collateral valued, individually or in the aggregate, in excess
of Twenty-Five Thousand Dollars ($25,000.00) to a bailee at a location other than to a bailee and at a location already disclosed in the Perfection Certificate, (2) change its jurisdiction of organization, (3) change its organizational
structure or type, (4) change its legal name, or (5) change any organizational number (if any) assigned by its jurisdiction of organization. If Borrower intends to deliver any portion of the Collateral valued, individually or in the
aggregate, in excess of Twenty-Five Thousand Dollars ($25,000.00) to a bailee, and Bank and such bailee are not already parties to a bailee agreement governing both the Collateral and the location to which Borrower intends to deliver the Collateral,
then Borrower will first receive the written consent of Bank, and such bailee shall execute and deliver a bailee agreement in form and substance satisfactory to Bank in its sole discretion. 

7.3 Mergers or Acquisitions. Merge or consolidate, or permit any of its Subsidiaries to merge or consolidate, with any other Person, or
acquire, or permit any of its Subsidiaries to acquire, all or substantially all of the capital stock or property of another Person. A Subsidiary may merge or consolidate into another Subsidiary or into Borrower. 

  
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 7.4 Indebtedness. Create, incur, assume, or be liable for any Indebtedness, or permit any
Subsidiary to do so, other than Permitted Indebtedness. 
 7.5 Encumbrance. Create, incur, allow, or suffer any Lien on any of
its property, or assign or convey any right to receive income, including the sale of any Accounts, or permit any of its Subsidiaries to do so, except for Permitted Liens, permit any Collateral not to be subject to the first priority security
interest granted herein, or enter into any agreement, document, instrument or other arrangement (except with or in favor of Bank) with any Person which directly or indirectly prohibits or has the effect of prohibiting Borrower or any Subsidiary from
assigning, mortgaging, pledging, granting a security interest in or upon, or encumbering any of Borrower’s or any Subsidiary’s Intellectual Property, except as is otherwise permitted in Section 7.1 hereof and the definition of
“Permitted Liens” herein. 
 7.6 Maintenance of Collateral Accounts. Maintain any Collateral Account except pursuant
to the terms of Section 6.6(b) hereof. 
 7.7 Distributions; Investments. (a) Pay any dividends or make any
distribution or payment or redeem, retire or purchase any capital stock provided that (i) Borrower may convert any of its convertible securities into other securities pursuant to the terms of such convertible securities or otherwise in exchange
thereof, (ii) Borrower may pay dividends solely in common stock, and (iii) Borrower may repurchase the stock of former employees or consultants pursuant to stock repurchase agreements so long as an Event of Default does not exist at the
time of such repurchase and would not exist after giving effect to such repurchase, provided such repurchase does not exceed in the aggregate of Two Hundred Thousand Dollars ($200,000) per fiscal year; or (b) directly or indirectly make any
Investment other than Permitted Investments, or permit any of its Subsidiaries to do so. 
 7.8 Transactions with Affiliates.
Directly or indirectly enter into or permit to exist any material transaction with any Affiliate of Borrower, except for transactions that are in the ordinary course of Borrower’s business, upon fair and reasonable terms that are no less
favorable to Borrower than would be obtained in an arm’s length transaction with a non-affiliated Person. 
 7.9 Subordinated
Debt. (a) Make or permit any payment on any Subordinated Debt, except under the terms of the subordination, intercreditor, or other similar agreement to which such Subordinated Debt is subject, or (b) amend any provision in any
document relating to the Subordinated Debt which would increase the amount thereof or adversely affect the subordination thereof to Obligations owed to Bank. 

7.10 Compliance. Become an “investment company” or a company controlled by an “investment company”, under the
Investment Company Act of 1940, as amended, or undertake as one of its important activities extending credit to purchase or carry margin stock (as defined in Regulation U of the Board of Governors of the Federal Reserve System), or use the proceeds
of any Credit Extension for that purpose; fail to meet the minimum funding requirements of ERISA, permit a Reportable Event or Prohibited Transaction, as defined in ERISA, to occur; fail to comply with the Federal Fair Labor Standards Act or violate
any other law or regulation, if the violation could reasonably be expected to have a material adverse effect on Borrower’s business, or permit any of its Subsidiaries to do so; withdraw or permit any Subsidiary to withdraw from

  
 - 16 - 

 
participation in, permit partial or complete termination of, or permit the occurrence of any other event with respect to, any present pension, profit sharing and deferred compensation plan which
could reasonably be expected to result in any liability of Borrower, including any liability to the Pension Benefit Guaranty Corporation or its successors or any other governmental agency. 

 

	 	8	EVENTS OF DEFAULT 

 Any one of the following shall constitute an event of default
(an “Event of Default”) under this Agreement: 
 8.1 Payment Default. Borrower fails to (a) make any payment of
principal or interest on any Credit Extension on its due date, or (b) pay any other Obligations within three (3) Business Days after such Obligations are due and payable (which three (3) Business Day cure period shall not apply to
payments due on the Maturity Date). During the cure period, the failure to make or pay any payment specified under clause (a) or (b) hereunder is not an Event of Default (but no Credit Extension will be made during the cure period);

 8.2 Covenant Default. 

(a) Borrower fails or neglects to perform any obligation in Sections 6.2, 6.4, 6.5, 6.6, or 6.7(b) or violates any covenant in Section 7;
or 
 (b) Borrower fails or neglects to perform, keep, or observe any other term, provision, condition, covenant or agreement contained in
this Agreement or any Loan Documents, and as to any default (other than those specified in this Section 8) under such other term, provision, condition, covenant or agreement that can be cured, has failed to cure the default within ten
(10) days after the occurrence thereof; provided, however, that if the default cannot by its nature be cured within the ten (10) day period or cannot after diligent attempts by Borrower be cured within such ten (10) day period, and
such default is likely to be cured within a reasonable time, then Borrower shall have an additional period (which shall not in any case exceed thirty (30) days) to attempt to cure such default, and within such reasonable time period the failure
to cure the default shall not be deemed an Event of Default (but no Credit Extensions shall be made during such cure period). Cure periods provided under this section shall not apply, among other things, to financial covenants or any other covenants
set forth in clause (a) above; 
 8.3 Material Adverse Change. A Material Adverse Change occurs; 

8.4 Attachment; Levy; Restraint on Business. 

(a) (i) The service of process seeking to attach, by trustee or similar process, any funds of Borrower or of any entity under the control of
Borrower (including a Subsidiary) on deposit or otherwise maintained with Bank or any Bank Affiliate, or (ii) a notice of lien or levy is filed against any of Borrower’s assets by any government agency, and the same under subclauses
(i) and (ii) hereof are not, within ten (10) days after the occurrence thereof, discharged or stayed (whether through the posting of a bond or otherwise); provided, however, no Credit Extensions shall be made during any ten
(10) day cure period; or 
 (b) (i) any material portion of Borrower’s assets is attached, seized, levied on, or comes into
possession of a trustee or receiver, or (ii) any court order enjoins, restrains, or prevents Borrower from conducting any material part of its business; 

  
 - 17 - 

 8.5 Insolvency. (a) Borrower is unable to pay its debts (including trade debts) as
they become due or otherwise becomes insolvent; (b) Borrower begins an Insolvency Proceeding; or (c) an Insolvency Proceeding is begun against Borrower and not dismissed or stayed within thirty (30) days (but no Credit Extensions
shall be made while of any of the conditions described in clause (a) exist and/or until any Insolvency Proceeding is dismissed); 

8.6 Other Agreements. There is, under any agreement to which Borrower is a party with a third party or parties, (a) any default
resulting in a right by such third party or parties, whether or not exercised, to accelerate the maturity of any Indebtedness in an amount individually or in the aggregate in excess of Fifty Thousand Dollars ($50,000); or (b) any default by
Borrower, the result of which could have a material adverse effect on Borrower’s business; 
 8.7 Judgments. One or more
final judgments, orders, or decrees for the payment of money in an amount, individually or in the aggregate, of at least Fifty Thousand Dollars ($50,000) (not covered by independent third-party insurance as to which liability has been accepted by
such insurance carrier) shall be rendered against Borrower and the same are not, within ten (10) days after the entry thereof, discharged or execution thereof stayed or bonded pending appeal, or such judgments are not discharged prior to the
expiration of any such stay (provided that no Credit Extensions will be made prior to the discharge, stay, or bonding of such judgment, order, or decree); 

8.8 Misrepresentations. Borrower or any Person acting for Borrower makes any representation, warranty, or other statement now or later
in this Agreement, any Loan Document or in any writing delivered to Bank or to induce Bank to enter this Agreement or any Loan Document, and such representation, warranty, or other statement is incorrect in any material respect when made; or

 8.9 Subordinated Debt. Any document, instrument, or agreement evidencing any Subordinated Debt shall for any reason be revoked
or invalidated or otherwise cease to be in full force and effect, any Person shall be in breach thereof or contest in any manner the validity or enforceability thereof or deny that it has any further liability or obligation thereunder, or the
Obligations shall for any reason be subordinated or shall not have the priority contemplated by this Agreement. 
  

	 	9	BANK’S RIGHTS AND REMEDIES 

 9.1 Rights and Remedies. While an Event
of Default occurs and continues Bank may, without notice or demand, do any or all of the following: 
 (a) declare all Obligations
immediately due and payable (but if an Event of Default described in Section 8.5 occurs all Obligations are immediately due and payable without any action by Bank); 

  
 - 18 - 

 (b) stop advancing money or extending credit for Borrower’s benefit under this Agreement or
under any other agreement between Borrower and Bank; 
 (c) demand that Borrower (i) deposit cash with Bank in an amount equal to 105%
(if the Letter of Credit is denominated in Dollars) or 110% (if the Letter of Credit is denominated in a Foreign Currency) of the aggregate face amount of all Letters of Credit remaining undrawn (plus all interest, fees, and costs due or to become
due in connection therewith (as estimated by Bank in its good faith business judgment)), to secure all of the Obligations relating to such Letters of Credit, as collateral security for the repayment of any future drawings under such Letters of
Credit, and Borrower shall forthwith deposit and pay such amounts, and (ii) pay in advance all letter of credit fees scheduled to be paid or payable over the remaining term of any Letters of Credit; 

(d) terminate any FX Forward Contracts; 

(e) settle or adjust disputes and claims directly with Account Debtors for amounts on terms and in any order that Bank considers advisable,
notify any Person owing Borrower money of Bank’s security interest in such funds, and verify the amount of such account; 
 (f) make
any payments and do any acts it considers necessary or reasonable to protect the Collateral and/or its security interest in the Collateral. Borrower shall assemble the Collateral if Bank requests and make it available as Bank designates. Bank may
enter premises where the Collateral is located, take and maintain possession of any part of the Collateral, and pay, purchase, contest, or compromise any Lien which appears to be prior or superior to its security interest and pay all expenses
incurred. Borrower grants Bank a license to enter and occupy any of its premises, without charge, to exercise any of Bank’s rights or remedies; 

(g) apply to the Obligations any (i) balances and deposits of Borrower it holds, or (ii) any amount held by Bank owing to or for the
credit or the account of Borrower; 
 (h) ship, reclaim, recover, store, finish, maintain, repair, prepare for sale, advertise for sale, and
sell the Collateral. Bank is hereby granted a non-exclusive, royalty-free license or other right to use, without charge, Borrower’s labels, Patents, Copyrights, mask works, rights of use of any name, trade secrets, trade names, Trademarks, and
advertising matter, or any similar property as it pertains to the Collateral, in completing production of, advertising for sale, and selling any Collateral and, in connection with Bank’s exercise of its rights under this Section,
Borrower’s rights under all licenses and all franchise agreements inure to Bank’s benefit; 
 (i) place a “hold” on any
account maintained with Bank and/or deliver a notice of exclusive control, any entitlement order, or other directions or instructions pursuant to any Control Agreement or similar agreements providing control of any Collateral; 

(j) demand and receive possession of Borrower’s Books; and 

(k) exercise all rights and remedies available to Bank under the Loan Documents or at law or equity, including all remedies provided under the
Code (including disposal of the Collateral pursuant to the terms thereof). 

  
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 9.2 Power of Attorney. Borrower hereby irrevocably appoints Bank as its lawful
attorney-in-fact, exercisable upon the occurrence and during the continuance of an Event of Default, to: (a) endorse Borrower’s name on any checks or other forms of payment or security; (b) sign Borrower’s name on any invoice or
bill of lading for any Account or drafts against Account Debtors; (c) settle and adjust disputes and claims about the Accounts directly with Account Debtors, for amounts and on terms Bank determines reasonable; (d) make, settle, and adjust
all claims under Borrower’s insurance policies; (e) pay, contest or settle any Lien, charge, encumbrance, security interest, and adverse claim in or to the Collateral, or any judgment based thereon, or otherwise take any action to
terminate or discharge the same; and (f) transfer the Collateral into the name of Bank or a third party as the Code permits. Borrower hereby appoints Bank as its lawful attorney-in-fact to sign Borrower’s name on any documents necessary to
perfect or continue the perfection of Bank’s security interest in the Collateral regardless of whether an Event of Default has occurred until all Obligations have been satisfied in full and Bank is under no further obligation to make Credit
Extensions hereunder. Bank’s foregoing appointment as Borrower’s attorney in fact, and all of Bank’s rights and powers, coupled with an interest, are irrevocable until all Obligations have been fully repaid and performed and
Bank’s obligation to provide Credit Extensions terminates. 
 9.3 Protective Payments. If Borrower fails to obtain the
insurance called for by Section 6.5 or fails to pay any premium thereon or fails to pay any other amount which Borrower is obligated to pay under this Agreement or any other Loan Document, Bank may obtain such insurance or make such payment,
and all amounts so paid by Bank are Bank Expenses and immediately due and payable, bearing interest at the then highest rate applicable to the Obligations, and secured by the Collateral. Bank will make reasonable efforts to provide Borrower with
notice of Bank obtaining such insurance at the time it is obtained or within a reasonable time thereafter. No payments by Bank are deemed an agreement to make similar payments in the future or Bank’s waiver of any Event of Default. 

9.4 Application of Payments and Proceeds Upon Default. If an Event of Default has occurred and is continuing, Bank may apply any funds
in its possession, whether from Borrower account balances, payments, proceeds realized as the result of any collection of Accounts or other disposition of the Collateral, or otherwise, to the Obligations in such order as Bank shall determine in its
sole discretion. Any surplus shall be paid to Borrower or other Persons legally entitled thereto; Borrower shall remain liable to Bank for any deficiency. If Bank, in its good faith business judgment, directly or indirectly enters into a deferred
payment or other credit transaction with any purchaser at any sale of Collateral, Bank shall have the option, exercisable at any time, of either reducing the Obligations by the principal amount of the purchase price or deferring the reduction of the
Obligations until the actual receipt by Bank of cash therefor. 
 9.5 Bank’s Liability for Collateral. So long as Bank
complies with applicable law and reasonable banking practices regarding the safekeeping of the Collateral in the possession or under the control of Bank, Bank shall not be liable or responsible for: (a) the safekeeping of the

  
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Collateral; (b) any loss or damage to the Collateral (except for any loss or damage caused by Bank’s gross negligence or willful misconduct); (c) any diminution in the value of the
Collateral; or (d) any act or default of any carrier, warehouseman, bailee, or other Person. Borrower bears all risk of loss, damage or destruction of the Collateral. 

9.6 No Waiver; Remedies Cumulative. Bank’s failure, at any time or times, to require strict performance by Borrower of any
provision of this Agreement or any other Loan Document shall not waive, affect, or diminish any right of Bank thereafter to demand strict performance and compliance herewith or therewith. No waiver hereunder shall be effective unless signed by the
party granting the waiver and then is only effective for the specific instance and purpose for which it is given. Bank’s rights and remedies under this Agreement and the other Loan Documents are cumulative. Bank has all rights and remedies
provided under the Code, by law, or in equity. Bank’s exercise of one right or remedy is not an election and shall not preclude Bank from exercising any other remedy under this Agreement or other remedy available at law or in equity, and
Bank’s waiver of any Event of Default is not a continuing waiver. Bank’s delay in exercising any remedy is not a waiver, election, or acquiescence. 

9.7 Demand Waiver. Borrower waives demand, notice of default or dishonor, notice of payment and nonpayment, notice of any default,
nonpayment at maturity, release, compromise, settlement, extension, or renewal of accounts, documents, instruments, chattel paper, and guarantees held by Bank on which Borrower is liable. 

 

	 	10	NOTICES 

 All notices, consents, requests, approvals, demands, or other communication by any party
to this Agreement or any other Loan Document must be in writing and shall be deemed to have been validly served, given, or delivered: (a) upon the earlier of actual receipt and three (3) Business Days after deposit in the U.S. mail, first
class, registered or certified mail return receipt requested, with proper postage prepaid; (b) upon transmission, when sent by electronic mail or facsimile transmission; (c) one (1) Business Day after deposit with a reputable
overnight courier with all charges prepaid; or (d) when delivered, if hand-delivered by messenger, all of which shall be addressed to the party to be notified and sent to the address, facsimile number, or email address indicated below. Bank or
Borrower may change its mailing or electronic mail address or facsimile number by giving the other party written notice thereof in accordance with the terms of this Section 10. 

 

			
	If to Borrower:	  	 Acacia Communications, Inc.
 3 Clock Tower
Place, Suite 210
 Maynard, Massachusetts 01754
 Attn: Raj
Shanmugaraj
 Fax:
                                        

 Email: Raj.Shanmugaraj @acacia-inc.com

		
	If to Bank:	  	 Silicon Valley Bank
 275 Grove Street, Suite
2-200
 Newton, Massachusetts 02466

Attn:    Mr. Dan Allred

Fax:     (617) 969-439

Email:  DAllred@svb.com

  
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	with a copy to:	  	 Riemer & Braunstein LLP
 Three Center
Plaza
 Boston, Massachusetts 02108

Attn:    David A. Ephraim, Esquire

Fax:     (617) 880-3456

Email:  DEphraim@riemerlaw.com

  

	 	11	CHOICE OF LAW, VENUE, AND JURY TRIAL WAIVER 

 Massachusetts law governs the Loan
Documents without regard to principles of conflicts of law. Borrower and Bank each submit to the exclusive jurisdiction of the State and Federal courts in Boston, Massachusetts; provided, however, that nothing in this Agreement shall be deemed to
operate to preclude Bank from bringing suit or taking other legal action in any other jurisdiction to realize on the Collateral or any other security for the Obligations, or to enforce a judgment or other court order in favor of Bank. Borrower
expressly submits and consents in advance to such jurisdiction in any action or suit commenced in any such court, and Borrower hereby waives any objection that it may have based upon lack of personal jurisdiction, improper venue, or forum non
conveniens and hereby consents to the granting of such legal or equitable relief as is deemed appropriate by such court. Borrower hereby waives personal service of the summons, complaints, and other process issued in such action or suit and agrees
that service of such summons, complaints, and other process may be made by registered or certified mail addressed to Borrower at the address set forth in Section 10 of this Agreement and that service so made shall be deemed completed upon the
earlier to occur of Borrower’s actual receipt thereof or three (3) days after deposit in the U.S. mails, proper postage prepaid. 

TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, BORROWER AND BANK EACH WAIVE THEIR RIGHT TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION
ARISING OUT OF OR BASED UPON THIS AGREEMENT, THE LOAN DOCUMENTS OR ANY CONTEMPLATED TRANSACTION, INCLUDING CONTRACT, TORT, BREACH OF DUTY AND ALL OTHER CLAIMS. THIS WAIVER IS A MATERIAL INDUCEMENT FOR BOTH PARTIES TO ENTER INTO THIS AGREEMENT. EACH
PARTY HAS REVIEWED THIS WAIVER WITH ITS COUNSEL. 
  

	 	12	GENERAL PROVISIONS 

 12.1 Successors and Assigns. This Agreement binds and
is for the benefit of the successors and permitted assigns of each party. Borrower may not assign this Agreement or any rights or obligations under it without Bank’s prior written consent (which may be granted or withheld in Bank’s
discretion). Bank has the right, without the consent of or notice to Borrower, to sell, transfer, assign, negotiate, or grant participation in all or any part of, or any interest in, Bank’s obligations, rights, and benefits under this Agreement
and the other Loan Documents (other than the Warrant, as to which assignment, transfer and other such actions are governed by the terms of the Warrant). 

  
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 12.2 Indemnification. Borrower agrees to indemnify, defend and hold Bank and its
directors, officers, employees, agents, attorneys, or any other Person affiliated with or representing Bank (each, an “Indemnified Person”) harmless against: (a) all obligations, demands, claims, and liabilities (collectively,
“Claims”) claimed or asserted by any other party in connection with the transactions contemplated by the Loan Documents; and (b) all losses or expenses (including Bank Expenses) in any way suffered, incurred, or paid by such
Indemnified Person as a result of, following from, consequential to, or arising from transactions between Bank and Borrower contemplated by the Loan Documents (including reasonable attorneys’ fees and expenses), except for Claims and/or losses
directly caused by such Indemnified Person’s gross negligence or willful misconduct. 
 12.3 Time of Essence. Time is of
the essence for the performance of all Obligations in this Agreement. 
 12.4 Severability of Provisions. Each provision of this
Agreement is severable from every other provision in determining the enforceability of any provision. 
 12.5 Correction of Loan
Documents. Bank may correct patent errors and fill in any blanks in the Loan Documents consistent with the agreement of the parties. 

12.6 Amendments in Writing; Waiver; Integration. No purported amendment or modification of any Loan Document, or waiver, discharge or
termination of any obligation under any Loan Document, shall be enforceable or admissible unless, and only to the extent, expressly set forth in a writing signed by the party against which enforcement or admission is sought. Without limiting the
generality of the foregoing, no oral promise or statement, nor any action, inaction, delay, failure to require performance or course of conduct shall operate as, or evidence, an amendment, supplement or waiver or have any other effect on any Loan
Document. Any waiver granted shall be limited to the specific circumstance expressly described in it, and shall not apply to any subsequent or other circumstance, whether similar or dissimilar, or give rise to, or evidence, any obligation or
commitment to grant any further waiver. The Loan Documents represent the entire agreement about this subject matter and supersede prior negotiations or agreements. All prior agreements, understandings, representations, warranties, and negotiations
between the parties about the subject matter of the Loan Documents merge into the Loan Documents. 
 12.7 Counterparts. This
Agreement may be executed in any number of counterparts and by different parties on separate counterparts, each of which, when executed and delivered, is an original, and all taken together, constitute one Agreement. 

12.8 Survival. All covenants, representations and warranties made in this Agreement continue in full force until this Agreement has
terminated pursuant to its terms and all Obligations (other than inchoate indemnity obligations and any other obligations which, by their terms, are to survive the termination of this Agreement) have been paid in full and satisfied. The obligation
of Borrower in Section 12.2 to indemnify Bank shall survive until the statute of limitations with respect to such claim or cause of action shall have run. 

  
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 12.9 Confidentiality. In handling any confidential information, Bank shall exercise the
same degree of care that it exercises for its own proprietary information, but disclosure of information may be made: (a) to Bank’s Subsidiaries or Affiliates (such Subsidiaries and Affiliates, together with Bank, collectively, “Bank
Entities”), provided that such Bank Entities agree to be bound by the terms of this Section 12.9; (b) to prospective transferees or purchasers of any interest in the Credit Extensions (provided, however, Bank shall use its best
efforts to obtain any prospective transferee’s or purchaser’s agreement to the terms of this provision); (c) as required by law, regulation, subpoena, or other order; (d) to Bank’s regulators or as otherwise required in
connection with Bank’s examination or audit; (e) as Bank considers appropriate in exercising remedies under the Loan Documents; and (f) to third-party service providers of Bank so long as such service providers have executed a
confidentiality agreement with Bank with terms no less restrictive than those contained herein. Confidential information does not include information that is either: (i) in the public domain or in Bank’s possession when disclosed to Bank,
or becomes part of the public domain after disclosure to Bank through no fault of Bank; or (ii) disclosed to Bank by a third party if Bank does not know that the third party is prohibited from disclosing the information. 

Bank Entities may use the confidential information for reporting purposes and the development and distribution of databases and market
analyses so long as such confidential information is aggregated and anonymized prior to distribution unless otherwise expressly permitted by Borrower. The provisions of the immediately preceding sentence shall survive the termination of this
Agreement. 
 12.10 Right of Set Off. Borrower hereby grants to Bank, a lien, security interest and right of set off as security for
all Obligations to Bank pursuant to this Agreement, whether now existing or hereafter arising upon and against all deposits, credits, collateral and property, now or hereafter in the possession, custody, safekeeping or control of Bank or any entity
under the control of Bank (including a Bank subsidiary) or in transit to any of them. At any time after the occurrence and during the continuance of an Event of Default, without demand or notice, Bank may set off the same or any part thereof and
apply the same to any liability or obligation of Borrower even though unmatured and regardless of the adequacy of any other collateral securing the Obligations. ANY AND ALL RIGHTS TO REQUIRE BANK TO EXERCISE ITS RIGHTS OR REMEDIES WITH RESPECT TO
ANY OTHER COLLATERAL WHICH SECURES THE OBLIGATIONS, PRIOR TO EXERCISING ITS RIGHT OF SETOFF WITH RESPECT TO SUCH DEPOSITS, CREDITS OR OTHER PROPERTY OF BORROWER ARE HEREBY KNOWINGLY, VOLUNTARILY AND IRREVOCABLY WAIVED. 

12.11 Electronic Execution of Documents. The words “execution,” “signed,” “signature” and words of like
import in any Loan Document shall be deemed to include electronic signatures or the keeping of records in electronic form, each of which shall be of the same legal effect, validity and enforceability as a manually executed signature or the use of a
paper-based recordkeeping systems, as the case may be, to the extent and as provided for in any applicable law, including, without limitation, any state law based on the Uniform Electronic Transactions Act. 

12.12 Captions. The headings used in this Agreement are for convenience only and shall not affect the interpretation of this
Agreement. 

  
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 12.13 Construction of Agreement. The parties mutually acknowledge that they and their
attorneys have participated in the preparation and negotiation of this Agreement. In cases of uncertainty this Agreement shall be construed without regard to which of the parties caused the uncertainty to exist. 

12.14 Relationship. The relationship of the parties to this Agreement is determined solely by the provisions of this Agreement. The
parties do not intend to create any agency, partnership, joint venture, trust, fiduciary or other relationship with duties or incidents different from those of parties to an arm’s-length contract. 

12.15 Third Parties. Nothing in this Agreement, whether express or implied, is intended to: (a) confer any benefits, rights or
remedies under or by reason of this Agreement on any persons other than the express parties to it and their respective permitted successors and assigns; (b) relieve or discharge the obligation or liability of any person not an express party to
this Agreement; or (c) give any person not an express party to this Agreement any right of subrogation or action against any party to this Agreement. 
  

	 	13	DEFINITIONS 

 13.1 Definitions. As used in the Loan Documents, the word
“shall” is mandatory, the word “may” is permissive, the word “or” is not exclusive, the words “includes” and “including” are not limiting, the singular includes the plural, and numbers denoting
amounts that are set off in brackets are negative. As used in this Agreement, the following capitalized terms have the following meanings: 

“Account” is any “account” as defined in the Code with such additions to such term as may hereafter be made,
and includes, without limitation, all accounts receivable and other sums owing to Borrower. 
 “Account
Debtor” is any “account debtor” as defined in the Code with such additions to such term as may hereafter be made. 

“Advance” or “Advances” means an advance (or advances) under the Revolving Line. 

“Affiliate” is, with respect to any Person, each other Person that owns or controls directly or indirectly the Person,
any Person that controls or is controlled by or is under common control with the Person, and each of that Person’s senior executive officers, directors, partners and, for any Person that is a limited liability company, that Person’s
managers and members. 
 “Agreement” is defined in the preamble hereof. 

“Audited Financial Statements” is defined in Section 6.2(e) hereof. 

“Availability Amount” is (a) the lesser of (i) the Revolving Line or (ii) the amount available under
the Borrowing Base minus (b) the Dollar Equivalent amount of all outstanding Letters of Credit (including drawn but unreimbursed Letters of Credit) plus an amount equal to the Letter of Credit Reserve, minus (c) the FX Reduction Amount,
minus (d) any amounts used for Cash Management Services, and minus (e) the outstanding principal balance of any Advances. 

  
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 “Bank” is defined in the preamble hereof. 

“Bank Entities” is defined in Section 12.9. 

“Bank Expenses” are all audit fees and expenses, costs, and expenses (including reasonable attorneys’ fees and expenses)
for preparing, amending, negotiating, administering, defending and enforcing the Loan Documents (including, without limitation, those incurred in connection with appeals or Insolvency Proceedings) or otherwise incurred with respect to Borrower. 

“Board” is Borrower’s board of directors. 

“Borrower” is defined in the preamble hereof. 

“Borrower’s Books” are all Borrower’s books and records including ledgers, federal and state tax returns, records
regarding Borrower’s assets or liabilities, the Collateral, business operations or financial condition, and all computer programs or storage or any equipment containing such information. 

“Borrowing Base” is (a) eighty percent (80%) of Eligible Accounts, as determined by Bank from Borrower’s most
recent Borrowing Base Certificate plus (b) the lesser of (i) One Million Dollars ($1,000,000) and (ii) fifty percent (50%) of Eligible Purchase Orders, provided, however, that Bank may decrease the foregoing percentages in its
good faith business judgment based on events, conditions, contingencies, or risks which, as determined by Bank, may adversely affect Collateral. 

“Borrowing Base Certificate” is that certain certificate in the form attached hereto as Exhibit C. 

“Borrowing Base Report” is defined in Section 6.2(a). 

“Business Day” is any day that is not a Saturday, Sunday or a day on which Bank is closed. 

“Cash Equivalents” means (a) marketable direct obligations issued or unconditionally guaranteed by the United States or
any agency or any State thereof having maturities of not more than one (1) year from the date of acquisition; (b) commercial paper maturing no more than one (1) year after its creation and having the highest rating from either
Standard & Poor’s Ratings Group or Moody’s Investors Service, Inc.; and (c) Bank’s certificates of deposit issued maturing no more than one (1) year after issue. 

“Cash Management Services” is defined in Section 2.1.4. 

“Claims” is defined in Section 12.2. 

  
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 “Code” is the Uniform Commercial Code, as the same may, from time to
time, be enacted and in effect in the Commonwealth of Massachusetts; provided, that, to the extent that the Code is used to define any term herein or in any Loan Document and such term is defined differently in different Articles or Divisions of the
Code, the definition of such term contained in Article or Division 9 shall govern; provided further, that in the event that, by reason of mandatory provisions of law, any or all of the attachment, perfection, or priority of, or remedies with respect
to, Bank’s Lien on any Collateral is governed by the Uniform Commercial Code in effect in a jurisdiction other than the Commonwealth of Massachusetts, the term “Code” shall mean the Uniform Commercial Code as enacted and in
effect in such other jurisdiction solely for purposes of the provisions thereof relating to such attachment, perfection, priority, or remedies and for purposes of definitions relating to such provisions. 

“Collateral” is any and all properties, rights and assets of Borrower described on Exhibit A. 

“Collateral Account” is any Deposit Account, Securities Account, or Commodity Account. 

“Commodity Account” is any “commodity account” as defined in the Code with such additions to such term as
may hereafter be made. 
 “Compliance Certificate” is that certain certificate in the form attached hereto as
Exhibit D. 
 “Contingent Obligation” is, for any Person, any direct or indirect liability, contingent or
not, of that Person for (a) any indebtedness, lease, dividend, letter of credit or other obligation of another such as an obligation, in each case, directly or indirectly guaranteed, endorsed, co-made, discounted or sold with recourse by that
Person, or for which that Person is directly or indirectly liable; (b) any obligations for undrawn letters of credit for the account of that Person; and (c) all obligations from any interest rate, currency or commodity swap agreement,
interest rate cap or collar agreement, or other agreement or arrangement designated to protect a Person against fluctuation in interest rates, currency exchange rates or commodity prices; but “Contingent Obligation” does not include
endorsements in the ordinary course of business. The amount of a Contingent Obligation is the stated or determined amount of the primary obligation for which the Contingent Obligation is made or, if not determinable, the maximum reasonably
anticipated liability for it determined by the Person in good faith; but the amount may not exceed the maximum of the obligations under any guarantee or other support arrangement. 

“Control Agreement” is any control agreement entered into among the depository institution at which Borrower maintains
a Deposit Account or the securities intermediary or commodity intermediary at which Borrower maintains a Securities Account or a Commodity Account, Borrower, and Bank pursuant to which Bank obtains control (within the meaning of the Code) over such
Deposit Account, Securities Account, or Commodity Account. 
 “Copyrights” are any and all copyright rights,
copyright applications, copyright registrations and like protections in each work or authorship and derivative work thereof, whether published or unpublished and whether or not the same also constitutes a trade secret. 

  
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 “Credit Extension” is any Advance, Growth Capital Advance, Letter of
Credit, FX Forward Contract, amount utilized for Cash Management Services, or any other extension of credit by Bank for Borrower’s benefit. 

“Danish Subsidiary” means Acacia Communications Europe APS. 

“Default Rate” is defined in Section 2.3(b). 

“Deferred Revenue” is all amounts received or invoiced in advance of performance under contracts and not yet
recognized as revenue. 
 “Deposit Account” is any “deposit account” as defined in the Code with
such additions to such term as may hereafter be made. 
 “Designated Deposit Account” is Borrower’s deposit
account, account number                     , maintained with Bank. 

“Dollars,” “dollars” or use of the sign “$” means only lawful money of the United
States and not any other currency, regardless of whether that currency uses the “$” sign to denote its currency or may be readily converted into lawful money of the United States. 

“Dollar Equivalent” is, at any time, (a) with respect to any amount denominated in Dollars, such amount, and
(b) with respect to any amount denominated in a Foreign Currency, the equivalent amount therefor in Dollars as determined by Bank at such time on the basis of the then-prevailing rate of exchange in San Francisco, California, for sales of the
Foreign Currency for transfer to the country issuing such Foreign Currency. 
 “Draw Period” is the period of
time from the Effective Date through the earlier to occur of (a) March 31, 2012 or (b) an Event of Default. 

“Effective Date” is defined in the preamble hereof. 

“Eligible Accounts” means Accounts which arise in the ordinary course of Borrower’s business that meet all
Borrower’s representations and warranties in Section 5.3. Bank reserves the right at any time after the Effective Date to adjust any of the criteria set forth below and to establish new criteria in its good faith business judgment. Unless
Bank otherwise agrees in writing, Eligible Accounts shall not include: 
 (a) Accounts for which the Account Debtor is
Borrower’s Affiliate, officer, employee, or agent; 
 (b) Accounts that the Account Debtor has not paid within ninety (90) days of
invoice date regardless of invoice payment period terms; 
 (c) Accounts with credit balances over ninety (90) days from invoice date;

 (d) Accounts owing from an Account Debtor, fifty percent (50%) or more of whose Accounts have not been paid within ninety
(90) days of invoice date; 

  
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 (e) Accounts owing from an Account Debtor which does not have its principal place of business in
the United States (except for Eligible Foreign Accounts); 
 (f) Accounts billed and/or payable outside of the United States; 

(g) Accounts owing from an Account Debtor to the extent that Borrower is indebted or obligated in any manner to the Account Debtor (as
creditor, lessor, supplier or otherwise - sometimes called “contra” accounts, accounts payable, customer deposits or credit accounts); 

(h) Accounts owing from an Account Debtor which is a United States government entity or any department, agency, or instrumentality thereof
unless (i) Borrower has assigned its payment rights to Bank and the assignment has been acknowledged under the Federal Assignment of Claims Act of 1940, as amended, and (ii) Bank approves in writing, on a case by case basis in its sole and
absolute discretion; 
 (i) Accounts for demonstration or promotional equipment, or in which goods are consigned, or sold on a “sale
guaranteed”, “sale or return”, “sale on approval”, or other terms if Account Debtor’s payment may be conditional; 

(j) Accounts owing from an Account Debtor where goods or services have not yet been rendered to the Account Debtor (sometimes called memo
billings or pre-billings); 
 (k) Accounts subject to contractual arrangements between Borrower and an Account Debtor where payments shall
be scheduled or due according to completion or fulfillment requirements where the Account Debtor has a right of offset for damages suffered as a result of Borrower’s failure to perform in accordance with the contract (sometimes called contracts
accounts receivable, progress billings, milestone billings, or fulfillment contracts); 
 (l) Accounts owing from an Account Debtor the
amount of which may be subject to withholding based on the Account Debtor’s satisfaction of Borrower’s complete performance (but only to the extent of the amount withheld; sometimes called retainage billings); 

(m) Accounts subject to trust provisions, subrogation rights of a bonding company, or a statutory trust; 

(n) Accounts owing from an Account Debtor that has been invoiced for goods that have not been shipped to the Account Debtor unless Bank,
Borrower, and the Account Debtor have entered into an agreement acceptable to Bank in its sole discretion wherein the Account Debtor acknowledges that (i) it has title to and has ownership of the goods wherever located, (ii) a bona fide
sale of the goods has occurred, and (iii) it owes payment for such goods in accordance with invoices from Borrower (sometimes called “bill and hold” accounts); 

(o) Accounts for which the Account Debtor has not been invoiced; 

(p) Accounts that represent non-trade receivables or that are derived by means other than in the ordinary course of Borrower’s business;

  
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 (q) Accounts for which Borrower has permitted Account Debtor’s payment to extend beyond 90
days; 
 (r) Accounts arising from chargebacks, debit memos, or other payment deductions taken by an Account Debtor; 

(s) Accounts arising from product returns and/or exchanges (sometimes called “warranty” or “RMA” accounts); 

(t) Accounts in which the Account Debtor disputes liability or makes any claim (but only up to the disputed or claimed amount), or if the
Account Debtor is subject to an Insolvency Proceeding, or becomes insolvent, or goes out of business; 
 (u) Accounts owing from an Account
Debtor with respect to which Borrower has received Deferred Revenue (but only to the extent of such Deferred Revenue); 
 (v) Accounts owing
from an Account Debtor, including Affiliates, whose total obligations to Borrower exceed twenty-five percent (25%) of all Accounts, for the amounts that exceed that percentage (except for Specified Accounts), unless Bank approves in writing on
a case by case basis in its sole and absolute discretion; and 
 (w) Accounts for which Bank in its good faith business judgment determines
collection to be doubtful, including, without limitation, accounts represented by “refreshed” or “recycled” invoices. 

“Eligible Foreign Accounts” are Accounts which are otherwise Eligible Accounts but for the fact that the Account Debtor does
not have its principal place of business in the United States and that Bank approves in writing on a case by case basis in its sole and absolute discretion. As used herein, Eligible Foreign Accounts shall include the Specified Accounts 

“Eligible Purchase Orders” are binding, non-contingent and non-cancelable purchase orders issued within the previous ninety
(90) days, for the delivery of goods by Borrower or the provision of services by Borrower, and which, but for the fact that an invoice has not been sent, are otherwise “Eligible Accounts.” Upon the issuance of an invoice in respect of
such a purchase order, such applicable purchase order shall not be deemed to be an “Eligible Purchase Order”. 

“Equipment” is all “equipment” as defined in the Code with such additions to such term as may hereafter be made,
and includes without limitation all machinery, fixtures, goods, vehicles (including motor vehicles and trailers), and any interest in any of the foregoing. 

“ERISA” is the Employee Retirement Income Security Act of 1974, and its regulations. 

“Event of Default” is defined in Section 8. 

“Exchange Act” is the Securities Exchange Act of 1934, as amended. 

  
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 “First Milestone Event” is receipt by Bank of evidence, satisfactory to Bank in
its sole and absolute discretion, that Borrower has entered into a binding contract with Xtera to fulfill an order for one hundred (100) units, pursuant to which Borrower has received commitment fees in an amount of at least Eight Hundred
Thousand Dollars ($800,000). 
 “Foreign Currency” means lawful money of a country other than the United States. 

“Funding Date” is any date on which a Credit Extension is made to or for the account of Borrower which shall be a Business
Day. 
 “FX Business Day” is any day when (a) Bank’s Foreign Exchange Department is conducting its normal
business and (b) the Foreign Currency being purchased or sold by Borrower is available to Bank from the entity from which Bank shall buy or sell such Foreign Currency. 

“FX Forward Contract” is defined in Section 2.1.3. 

“FX Reduction Amount” is defined in Section 2.1.3. 

“FX Reserve” is defined in Section 2.1.3. 

“GAAP” is generally accepted accounting principles set forth in the opinions and pronouncements of the Accounting Principles
Board of the American Institute of Certified Public Accountants and statements and pronouncements of the Financial Accounting Standards Board or in such other statements by such other Person as may be approved by a significant segment of the
accounting profession, which are applicable to the circumstances as of the date of determination. 
 “General Intangibles”
is all “general intangibles” as defined in the Code in effect on the date hereof with such additions to such term as may hereafter be made, and includes without limitation, all Intellectual Property, claims, income and other tax refunds,
security and other deposits, payment intangibles, contract rights, options to purchase or sell real or personal property, rights in all litigation presently or hereafter pending (whether in contract, tort or otherwise), insurance policies (including
without limitation key man, property damage, and business interruption insurance), payments of insurance and rights to payment of any kind. 

“Good Faith Deposit” is defined in Section 2.4(c). 

“Governmental Approval” is any consent, authorization, approval, order, license, franchise, permit, certificate,
accreditation, registration, filing or notice, of, issued by, from or to, or other act by or in respect of, any Governmental Authority. 

“Governmental Authority” is any nation or government, any state or other political subdivision thereof, any agency,
authority, instrumentality, regulatory body, court, central bank or other entity exercising executive, legislative, judicial, taxing, regulatory or administrative functions of or pertaining to government, any securities exchange and any
self-regulatory organization. 

  
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 “Growth Capital Advance” or “Growth Capital Advances” is
defined in Section 2.15(a) hereof. 
 “Growth Capital Advance Amount” is an amount not to exceed Three
Million Dollars ($3,000,000) in the aggregate, available as follows: 
 (i) from the Effective Date through the Draw Period, One
Million Dollars ($1,000,000), in the aggregate; 
 (ii) upon the occurrence of the First Milestone Event through the Draw Period, Two
Million Dollars ($2,000,000) in the aggregate (inclusive of the original principal amount of any Growth Capital Advances made by Bank to Borrower); and 

(iii) upon the occurrence of the Second Milestone Event (but regardless of whether the First Milestone Event has occurred) through the Draw
Period, Three Million Dollars ($3,000,000) in the aggregate (inclusive of the original principal amount of any Growth Capital Advances made by Bank to Borrower). 

“Growth Capital Line Commitment Fee” is defined in Section 2.4(b). 

“Growth Capital Maturity Date” is March 1, 2015. 

“Indebtedness” is (a) indebtedness for borrowed money or the deferred price of property or services, such as
reimbursement and other obligations for surety bonds and letters of credit, (b) obligations evidenced by notes, bonds, debentures or similar instruments, (c) capital lease obligations, and (d) Contingent Obligations. 

“Indemnified Person” is defined in Section 12.2. 

“Insolvency Proceeding” is any proceeding by or against any Person under the United States Bankruptcy Code, or any
other bankruptcy or insolvency law, including assignments for the benefit of creditors, compositions, extensions generally with its creditors, or proceedings seeking reorganization, arrangement, or other relief. 

“Intellectual Property” means all of Borrower’s right, title, and interest in and to the following: 

(a) its Copyrights, Trademarks and Patents; 

(b) any and all trade secrets and trade secret rights, including, without limitation, any rights to unpatented inventions, know-how, operating
manuals; 
 (c) any and all source code; 

(d) any and all design rights which may be available to a Borrower; 

  
 - 32 - 

 (e) any and all claims for damages by way of past, present and future infringement of any of the
foregoing, with the right, but not the obligation, to sue for and collect such damages for said use or infringement of the Intellectual Property rights identified above; and 

(f) all amendments, renewals and extensions of any of the Copyrights, Trademarks or Patents. 

“Inventory” is all “inventory” as defined in the Code in effect on the date hereof with such additions to
such term as may hereafter be made, and includes without limitation all merchandise, raw materials, parts, supplies, packing and shipping materials, work in process and finished products, including without limitation such inventory as is temporarily
out of Borrower’s custody or possession or in transit and including any returned goods and any documents of title representing any of the above. 

“Investment” is any beneficial ownership interest in any Person (including stock, partnership interest or other
securities), and any loan, advance or capital contribution to any Person. 
 “Letter of Credit” means a
standby letter of credit issued by Bank or another institution based upon an application, guarantee, indemnity or similar agreement on the part of Bank as set forth in Section 2.1.2. 

“Letter of Credit Application” is defined in Section 2.1.2(b). 

“Letter of Credit Reserve” has the meaning set forth in Section 2.1.2(e). 

“Lien” is a claim, mortgage, deed of trust, levy, charge, pledge, security interest or other encumbrance of any kind,
whether voluntarily incurred or arising by operation of law or otherwise against any property. 
 “Loan
Documents” are, collectively, this Agreement, the Warrant, the Perfection Certificate, any note, or notes or guaranties executed by Borrower, and any other present or future agreement between Borrower and/or for the benefit of Bank in
connection with this Agreement, all as amended, restated, or otherwise modified. 
 “MassDev Note” is defined
in the definition of “Permitted Indebtedness” hereof. 
 “MassDev Security Agreement” is defined in
the definition of “Permitted Indebtedness” hereof. 
 “Material Adverse Change” is (a) a material
impairment in the perfection or priority of Bank’s Lien in the Collateral or in the value of such Collateral; (b) a material adverse change in the business, operations, or condition (financial or otherwise) of Borrower; or (c) a
material impairment of the prospect of repayment of any portion of the Obligations. In determining whether a “Material Adverse Change” has occurred under clause (b) or (c) above, Bank’s primary, though not sole,
consideration will be whether Borrower has or will have sufficient cash resources to repay the Obligations as and when due. Bank recognizes that, as a pre-profit company, Borrower’s cash resources will decline over time, and Borrower will
periodically 

  
 - 33 - 

 
require additional infusions of equity capital. The clear intention of Borrower’s investors to continue to fund Borrower in the amounts and timeframe necessary, in Bank’s good faith
judgment, to enable Borrower to satisfy the Obligations as they become due and payable is the most significant criterion Bank shall consider in making any such determination. 

“Maturity Date” means either the Revolving Line Maturity Date or the Growth Capital Maturity Date, as applicable.

 “Monthly Financial Statements” is defined in Section 6.2(c). 

“Obligations” are Borrower’s obligations to pay when due any debts, principal, interest, Bank Expenses and other
amounts Borrower owes Bank now or later, whether under this Agreement, the Loan Documents (other than the Warrant), or otherwise, including, without limitation, all obligations relating to letters of credit (including reimbursement obligations for
drawn and undrawn letters of credit), cash management services, and foreign exchange contracts, if any, and including interest accruing after Insolvency Proceedings begin and debts, liabilities, or obligations of Borrower assigned to Bank, and to
perform Borrower’s duties under the Loan Documents (other than the Warrant). 
 “Operating Documents”
are, for any Person, such Person’s formation documents, as certified with the Secretary of State of such Person’s state of formation on a date that is no earlier than 30 days prior to the Effective Date, and, (a) if such Person is a
corporation, its bylaws in current form, (b) if such Person is a limited liability company, its limited liability company agreement (or similar agreement), and (c) if such Person is a partnership, its partnership agreement (or similar
agreement), each of the foregoing with all current amendments or modifications thereto. 
 “Patents” means
all patents, patent applications and like protections including without limitation improvements, divisions, continuations, renewals, reissues, extensions and continuations-in-part of the same. 

“Payment/Advance Form” is that certain form attached hereto as Exhibit B. 

“Payment Date” is the first Business Day of each month. 

“Perfection Certificate” is defined in Section 5.1. 

“Permitted Indebtedness” is: 

(a) Borrower’s Indebtedness to Bank under this Agreement and the other Loan Documents; 

(b) Indebtedness existing on the Effective Date and shown on the Perfection Certificate; 

(c) Subordinated Debt; 

  
 - 34 - 

 (d) unsecured Indebtedness to trade creditors incurred in the ordinary course of business; 

(e) Indebtedness incurred as a result of endorsing negotiable instruments received in the ordinary course of business; 

(f) Indebtedness secured by Liens permitted under clauses (a) and (c) of the definition of “Permitted Liens” hereunder;

 (g) extensions, refinancings, modifications, amendments and restatements of any items of Permitted Indebtedness (a) through
(f) above, provided that the principal amount thereof is not increased or the terms thereof are not modified to impose more burdensome terms upon Borrower or its Subsidiary, as the case may be; and 

(h) Indebtedness in favor of Massachusetts Development Finance Agency pursuant to that certain Security Agreement between Borrower and
Massachusetts Development Finance Agency dated as of February 25, 2011 (the “MassDev Security Agreement”) and that certain Promissory Note between Borrower and Massachusetts Development Finance Agency dated as of
February 25, 2011 (the “MassDev Note”), up to the maximum principal amount of Three Million Dollars ($3,000,000.00). 

“Permitted Investments” are: 

(a) Investments (including, without limitation, Subsidiaries) existing on the Effective Date and shown on the Perfection Certificate; 

(b) (i) Investments consisting of Cash Equivalents, and (ii) any Investments permitted by Borrower’s investment policy, as amended
from time to time, provided that such investment policy (and any such amendment thereto) has been approved in writing by Bank; 
 (c)
Investments by Borrower in its Danish Subsidiary not to exceed Two Hundred Fifty Thousand Dollars ($250,000.00) in the aggregate in any fiscal year; 

(d) (i) marketable direct obligations issued or unconditionally guaranteed by the United States or America or any agency or any State thereof
maturing within one (1) year from the date of acquisition thereof, (ii) commercial paper maturing no more than one (1) year from the date of creation thereof and currently having a rating of at least A-2 or P-2 from either Standard
and Poor’s Corporation or Moody’s Investors Service, (iii) certificates of deposit maturing no more than one (1) year from the date of the investment therein, and (iv) money market accounts; 

(e) Investments consisting of (i) travel advances and employee relocation loans and other employee loans and advances in the ordinary
course of business, and (ii) loans to employees, officers or directors relating to the purchase of equity securities of Borrower or its Subsidiaries pursuant to employee stock purchase plans or agreements approved by Borrower’s Board of
Directors; 

  
 - 35 - 

 (f) Investments (including debt obligations) received in connection with the bankruptcy or
reorganization of customers or suppliers and in settlement of delinquent obligations of, and other disputes with, customers or suppliers arising in the ordinary course of business; 

(g) Investments consisting of notes receivable of, or prepaid royalties and other credit extensions, to customers and suppliers who are not
Affiliates, in the ordinary course of business; provided that this paragraph (g) shall not apply to Investments of Borrower in any Subsidiary; and 

(h) Investments consisting of deposit accounts in which Bank has a perfected security interest. 

“Permitted Liens” are: 

(a) Liens existing on the Effective Date and shown on the Perfection Certificate or arising under this Agreement and the other Loan Documents;

 (b) Liens for taxes, fees, assessments or other government charges or levies, either (i) not due and payable or (ii) being
contested in good faith and for which Borrower maintains adequate reserves on its Books, provided that no notice of any such Lien has been filed or recorded under the Internal Revenue Code of 1986, as amended, and the Treasury Regulations adopted
thereunder; 
 (c) purchase money Liens or capital leases (i) on Equipment acquired or held by Borrower incurred for financing the
acquisition of the Equipment securing no more than Fifty Thousand Dollars ($50,000) in the aggregate amount outstanding, or (ii) existing on Equipment when acquired, if the Lien is confined to the property and improvements and the proceeds of
the Equipment; 
 (d) Liens incurred in the extension, renewal or refinancing of the indebtedness secured by Liens described in
(a) through (c), but any extension, renewal or replacement Lien must be limited to the property encumbered by the existing Lien and the principal amount of the indebtedness may not increase; 

(e) non-exclusive license of Intellectual Property granted to third parties in the ordinary course of business.; and 

(f) Liens in favor of Massachusetts Development Finance Agency pursuant to the MassDev Security Agreement and the MassDev Note. 

“Person” is any individual, sole proprietorship, partnership, limited liability company, joint venture, company,
trust, unincorporated organization, association, corporation, institution, public benefit corporation, firm, joint stock company, estate, entity or government agency. 

“Prime Rate” is Bank’s most recently announced “prime rate,” even if it is not Bank’s lowest
rate. 

  
 - 36 - 

 “Registered Organization” is any “registered organization” as
defined in the Code with such additions to such term as may hereafter be made. 
 “Requirement of Law” is as
to any Person, the organizational or governing documents of such Person, and any law (statutory or common), treaty, rule or regulation or determination of an arbitrator or a court or other Governmental Authority, in each case applicable to or
binding upon such Person or any of its property or to which such Person or any of its property is subject. 

“Responsible Officer” is any of the Chief Executive Officer, President, Chief Financial Officer and Controller of
Borrower. 
 “Restricted License” is any material license or other agreement with respect to which Borrower
is the licensee (a) that prohibits or otherwise restricts Borrower from granting a security interest in Borrower’s interest in such license or agreement or any other property, or (b) for which a default under or termination of could
interfere with the Bank’s right to sell any Collateral. 
 “Revolving Line” is an Advance or Advances in
an amount equal to Five Million Dollars ($5,000,000.00). 
 “Revolving Line Commitment Fee” is defined in
Section 2.4(a). 
 “Revolving Line Maturity Date” is June 8, 2012. 

“SEC” shall mean the Securities and Exchange Commission, any successor thereto, and any analogous Governmental
Authority. 
 “Second Milestone Event” means confirmation by Bank that Borrower has shipped pre-production
units which shall be production quality and have passed a formal release process to include one thousand (1,000) hours of product testing. 

“Securities Account” is any “securities account” as defined in the Code with such additions to such term as
may hereafter be made. 
 “Settlement Date” is defined in Section 2.1.3. 

“Specified Accounts” are Accounts for which the Account Debtor is Tellabs, ZTE, Xtera, Juniper, and Adva. 

“Subordinated Debt” is indebtedness incurred by Borrower subordinated to all of Borrower’s now or hereafter
indebtedness to Bank (pursuant to a subordination, intercreditor, or other similar agreement in form and substance satisfactory to Bank entered into between Bank and the other creditor), on terms acceptable to Bank. 

“Subsidiary” is, as to any Person, a corporation, partnership, limited liability company or other entity of which shares of
stock or other ownership interests having ordinary voting power (other than stock or such other ownership interests having such power only by reason of the happening of a contingency) to elect a majority of the board of directors or other managers
of 

  
 - 37 - 

 
such corporation, partnership or other entity are at the time owned, or the management of which is otherwise controlled, directly or indirectly through one or more intermediaries, or both, by
such Person. Unless the context otherwise requires, each reference to a Subsidiary herein shall be a reference to a Subsidiary of Borrower. 

“Trademarks” means any trademark and servicemark rights, whether registered or not, applications to register and
registrations of the same and like protections, and the entire goodwill of the business of Borrower connected with and symbolized by such trademarks. 

“Transfer” is defined in Section 7.1. 

“Warrant” is that certain Warrant to Purchase Stock dated as of the Effective Date executed by Borrower in favor of
Bank. 
 [Signature page follows.] 

  
 - 38 - 

 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed as a
sealed instrument under the laws of the Commonwealth of Massachusetts as of the Effective Date. 
  

			
	BORROWER:
	
	ACACIA COMMUNICATIONS, INC.
		
	By	 	 /s/ Raj Shanmugaraj

	Name:	 	Raj Shanmugaraj
	Title:	 	President and Chief Executive Officer
	
	BANK:
	
	SILICON VALLEY BANK
		
	By	 	 /s/ Bradley Holt

	Name:	 	 Bradley Holt

	Title:	 	 Relationship Manager

  
 1 

 EXHIBIT A - COLLATERAL DESCRIPTION 

The Collateral consists of all of Borrower’s right, title and interest in and to the following personal property: 

All goods, Accounts (including health-care receivables), Equipment, Inventory, contract rights or rights to payment of money, leases, license
agreements, franchise agreements, General Intangibles (except as provided below), commercial tort claims, documents, instruments (including any promissory notes), chattel paper (whether tangible or electronic), cash, deposit accounts, fixtures,
letters of credit rights (whether or not the letter of credit is evidenced by a writing), securities, and 
 all other investment property,
supporting obligations, and financial assets, whether now owned or hereafter acquired, wherever located; and all Borrower’s Books relating to the foregoing, and any and all claims, rights and interests in any of the above and all substitutions
for, additions, attachments, accessories, accessions and improvements to and replacements, products, proceeds and insurance proceeds of any or all of the foregoing. 

Notwithstanding the foregoing, the Collateral does not include any Intellectual Property; provided, however, the Collateral shall include all
Accounts and all proceeds of Intellectual Property. If a judicial authority (including a U.S. Bankruptcy Court) would hold that a security interest in the underlying Intellectual Property is necessary to have a security interest in such Accounts and
such property that are proceeds of Intellectual Property, then the Collateral shall automatically, and effective as of the Effective Date, include the Intellectual Property to the extent necessary to permit perfection of Bank’s security
interest in such Accounts and such other property of Borrower that are proceeds of the Intellectual Property. 
 Pursuant to
Section 7.5 of the Agreement, Borrower has agreed not to encumber any of its Intellectual Property without Bank’s prior written consent. 

  
 1 

 EXHIBIT B - LOAN PAYMENT/ADVANCE REQUEST FORM 

DEADLINE FOR SAME DAY PROCESSING IS
NOON EASTERN TIME 
  

			
	Fax To:	  	Date:                     

  

			
	LOAN PAYMENT:	  	
		
		  	ACACIA COMMUNICATIONS, INC.
		
	From Account
#                                         
                                   	  	    To Account
#                                         
                               
	                                      
        (Deposit Account #)	  	                                      
            (Loan Account #)
		
	Principal
$                                         
                                         
   	  	    and/or Interest
$                                         
                           
		
	Authorized
Signature:                                       
                            	  	    Phone
Number:                                        
                             
	Print
Name/Title:                                       
                                   	  	

  

			
	LOAN ADVANCE:	  	
	
	Complete Outgoing Wire Request section below if all or a portion of the funds from this loan advance are for an outgoing wire.
		
	From Account
#                                         
                                 	  	    To Account
#                                         
                               
	                                      
                (Loan Account #)	  	                                      
      (Deposit Account #)
		
	Amount of Advance
$                                         
                        	  	
	  
 All Borrower’s representations and warranties in the
Loan and Security Agreement are true, correct and complete in all material respects on the date of the request for an advance; provided, however, that such materiality qualifier shall not be applicable to any representations and warranties that
already are qualified or modified by materiality in the text thereof; and provided, further that those representations and warranties expressly referring to a specific date shall be true, accurate and complete in all material respects as of such
date:
  

	Authorized
Signature:                                       
                         	  	    Phone
Number:                                        
                            
	 Print
Name/Title:                                       
                                

 
	  	

  

			
	OUTGOING WIRE REQUEST:
	
	 Complete only if all or a portion of funds from the loan advance above is to be wired.

 
 Deadline for same day processing is noon, Eastern Time

		
	Beneficiary
Name:                                        
                            	  	    Amount of Wire:
$                                         
                       
	Beneficiary
Name:                                        
                            	  	    Account
Number:                                        
                          
	City and
State:                                        
                                   	  	
		
	Beneficiary Bank Transit (ABA)
#:                                        
  	  	    Beneficiary Bank Code (Swift, Sort, Chip, etc.):                 
		  	 (For International Wire Only)

		
	Intermediary
Bank:                                        
                            	  	    Transit (ABA)
#:                                        
                           
	For Further Credit to:                             
                                         
                                         
                                         
                             
	
	Special Instructions:                              
                                         
                                         
                                         
                              
	  
 By signing below, I (we) acknowledge and agree that my
(our) funds transfer request shall be processed in accordance with and subject to the terms and conditions set forth in the agreement(s) covering funds transfer service(s), which agreements(s) were previously received and executed by me
(us).
  

	Authorized
Signature:                                       
                         	  	    2nd Signature (if
required):                                       
           
	Print
Name/Title:                                       
                                	  	    Print
Name/Title:                                       
                           
	Telephone
#:                                        
                                      	  	    Telephone
#:                                        
                                 

  
 1 

 EXHIBIT C - BORROWING BASE CERTIFICATE 

Borrower: Acacia Communications, Inc. 
 Lender: Silicon Valley
Bank 
 Commitment Amount: $5,000,000.00 
  

							
	 ACCOUNTS RECEIVABLE
	   

	 1.
	  	Accounts Receivable (invoiced) Book Value as of                     	  	$	            	  
	 2.
	  	Additions (please explain on next page)	  	$	 	  
	 3.
	  	Less: Intercompany / Employee / Non-Trade Accounts	  	$	 	  
	 4.
	  	NET TRADE ACCOUNTS RECEIVABLE	  	$	 	  
		
	 ACCOUNTS RECEIVABLE DEDUCTIONS (without duplication)
	  			
	 5.
	  	90 Days Past Invoice Date	  	$	 	  
	 6.
	  	Credit Balances over 90 Days	  	$	 	  
	 7.
	  	Balance of 50% over 90 Day Accounts (cross-age or current affected)	  	$	 	  
	 8.
	  	Foreign Account Debtor Accounts (except for Eligible Foreign Accounts)	  	$	 	  
	 9.
	  	Foreign Invoiced and/or Collected Accounts	  	$	 	  
	 10.
	  	Contra/Customer Deposit Accounts	  	$	 	  
	 11.
	  	U.S. Government Accounts	  	$	 	  
	 12.
	  	Promotion or Demo Accounts; Guaranteed Sale or Consignment Sale Accounts	  	$	 	  
	 13.
	  	Accounts with Memo or Pre-Billings	  	$	 	  
	 14.
	  	Contract Accounts; Accounts with Progress/Milestone Billings	  	$	 	  
	 15.
	  	Accounts for Retainage Billings	  	$	 	  
	 16.
	  	Trust / Bonded Accounts	  	$	 	  
	 17.
	  	Bill and Hold Accounts	  	$	 	  
	 18.
	  	Unbilled Accounts	  	$	 	  
	 19.
	  	Non-Trade Accounts (if not already deducted above)	  	$	 	  
	 20.
	  	Accounts with Extended Term Invoices (Net 90+)	  	$	 	  
	 21.
	  	Chargebacks Accounts / Debit Memos	  	$	 	  
	 22.
	  	Product Returns/Exchanges	  	$	 	  
	 23.
	  	Disputed Accounts; Insolvent Account Debtor Accounts	  	$	 	  
	 24.
	  	Deferred Revenue, if applicable/Other (please explain on next page)	  	$	 	  
	 25.
	  	Concentration Limits 25% (except for Specified Accounts)	  	$	 	  
	 26.
	  	TOTAL ACCOUNTS RECEIVABLE DEDUCTIONS	  	$	 	  
	 27.
	  	Eligible Accounts (#4 minus #26)	  	$	 	  
	 28.
	  	ELIGIBLE AMOUNT OF ACCOUNTS (80% of #27)	  	$	 	  
	 ELIGIBLE PURCHASE ORDERS
	  			
	 29.
	  	Eligible Purchase Orders	  	$	 	  
	 30.
	  	ELIGIBLE AMOUNT OF PURCHASE ORDERS (the lesser of (i) $1,000,000 and (ii) 50% of #29)	  	$	 	  
	 BALANCES
	  			
	 31.
	  	Maximum Loan Amount	  	$	 	  
	 32.
	  	Total Funds Available (Lesser of #31 or (#28 plus #30))	  	$	 	  
	 33.
	  	Present balance owing on Line of Credit	  	$	 	  
	 34.
	  	Outstanding under Sublimits	  	$	 	  
	 35.
	  	RESERVE POSITION (#32 minus #33 and #34)	  	$	 	  

 [Continued on following page.] 

  
 1 

 Explanatory comments from previous page: 

 

	
	  

	
	  

	
	  

	
	  

 The undersigned represents and warrants that this is true, complete and correct, and that the information in this Borrowing
Base Certificate complies with the representations and warranties in the Loan and Security Agreement between the undersigned and Silicon Valley Bank. 

 

			
	COMMENTS:
		
	By:	 	  

		 	Authorized Signer
		
	Date:	 	  

					
	BANK USE ONLY
		
	Received by:	 	  

		 	AUTHORIZED SIGNER
	
	
	Date	 	  

	Verified:	 	  

		 	AUTHORIZED SIGNER
		
	Date:	 	  

	Compliance Status:	 	Yes                No    

 
 

  
 2 

 EXHIBIT D 

COMPLIANCE CERTIFICATE 
  

					
	TO:	  	SILICON VALLEY BANK	  	Date:                     
	FROM:	  	ACACIA COMMUNICATIONS, INC.	  	

 The undersigned authorized officer of Acacia Communications, Inc. (“Borrower”) certifies that under
the terms and conditions of the Loan and Security Agreement between Borrower and Bank (the “Agreement”): 
 (1) Borrower is in
complete compliance for the period ending                      with all required covenants except as noted below; (2) there are no Events of
Default; (3) all representations and warranties in the Agreement are true and correct in all material respects on this date except as noted below; provided, however, that such materiality qualifier shall not be applicable to any representations
and warranties that already are qualified or modified by materiality in the text thereof; and provided, further that those representations and warranties expressly referring to a specific date shall be true, accurate and complete in all material
respects as of such date; (4) Borrower, and each of its Subsidiaries, has timely filed all required tax returns and reports, and Borrower has timely paid all foreign, federal, state and local taxes, assessments, deposits and contributions owed
by Borrower except as otherwise permitted pursuant to the terms of Section 5.9 of the Agreement; and (5) no Liens have been levied or claims made against Borrower or any of its Subsidiaries relating to unpaid employee payroll or benefits
of which Borrower has not previously provided written notification to Bank. 
 Attached are the required documents supporting the
certification. The undersigned certifies that these are prepared in accordance with GAAP consistently applied from one period to the next except as explained in an accompanying letter or footnotes. The undersigned acknowledges that no borrowings may
be requested at any time or date of determination that Borrower is not in compliance with any of the terms of the Agreement, and that compliance is determined not just at the date this certificate is delivered. Capitalized terms used but not
otherwise defined herein shall have the meanings given them in the Agreement. 
 Please indicate compliance status by circling Yes/No under
“Complies” column. 
  

					
	 Reporting Covenant
	  	 Required
	  	 Complies

			
	Monthly financial statements with Compliance Certificate	  	Monthly within 30 days	  	Yes    No    
	Annual financial statement (CPA Audited)	  	FYE within 180 days	  	Yes    No    
	10-Q, 10-K and 8-K	  	Within 5 days after filing with SEC	  	Yes    No    
	Borrowing Base Certificate A/R & A/P Agings	  	Monthly within 30 days	  	Yes    No    
	Board-approved Projections	  	First Business Day of month following Board approval; at least annually	  	Yes    No    

  
 1 

 The following are the exceptions with respect to the certification above. (If no exceptions
exist, state “No exceptions to note.”) 
  

	
	  

	
	  

	
	  

 

			
	Acacia Communications, Inc.
		
	By:	 	  

	Name:	 	  

	Date:	 	  

 

					
	BANK USE ONLY
		
	Received by:	 	  

		 	AUTHORIZED SIGNER
		
	Date	 	  

		
	Verified:	 	  

		 	AUTHORIZED SIGNER
		
	Date:	 	  

		
	Compliance Status:	 	Yes            No    

 
 

  
 2 

 FIRST LOAN MODIFICATION AGREEMENT 

This First Loan Modification Agreement (this “Loan Modification Agreement”) is entered into as of March 13, 2012, by and
between SILICON VALLEY BANK, a California corporation, with its principal place of business at 3003 Tasman Drive, Santa Clara, California 95054 and with a loan production office located at 275 Grove Street, Suite 2-200, Newton, Massachusetts
02466 (“Bank”) and ACACIA COMMUNICATIONS, INC., a Delaware corporation (“Borrower”). 
 1. DESCRIPTION OF EXISTING
INDEBTEDNESS AND OBLIGATIONS. Among other indebtedness and obligations which may be owing by Borrower to Bank, Borrower is indebted to Bank pursuant to a loan arrangement dated as of June 9, 2011, evidenced by, among other documents, a
certain Loan and Security Agreement dated as of June 9, 2011, between Borrower and Bank (as amended, the “Loan Agreement”). Capitalized terms used but not otherwise defined herein shall have the same meaning as in the Loan Agreement.

 2. DESCRIPTION OF COLLATERAL. Repayment of the Obligations is secured by the Collateral as described in the Loan Agreement (together with any
other collateral security granted to Bank, the “Security Documents”). Hereinafter, the Security Documents, together with all other documents evidencing or securing the Obligations shall be referred to as the “Existing Loan
Documents”. 
 3. DESCRIPTION OF CHANGE IN TERMS. 
  

	 	A.	Modifications to Loan Agreement. 

  

	 	1	The Loan Agreement shall be amended by deleting the text appearing in each of (i) Section 2.1.2 (entitled “Letters of Credit Sublimit”), (ii) Section 2.1.3 (entitled “Foreign Exchange
Sublimit”), and (iii) Section 2.1.4 (entitled “Cash Management Services Sublimit”) in their entirety and inserting in lieu of each of the foregoing “Intentionally Omitted”. 

 

	 	2	The Loan Agreement shall be amended by deleting the following text appearing in Section 2.1.5(a) (Growth Capital Advances) thereof: 

“Subject to the terms and conditions of this Agreement, during the Draw Period, Bank agrees to make up to three (3) advances (each a
“Growth Capital Advance” and collectively the “Growth Capital Advances”) available to Borrower in an amount not to exceed the Growth Capital Advance Amount.” 

and inserting in lieu thereof the following: 

“Subject to the terms and conditions of this Agreement, during the Draw Period, Bank agrees to make up to two (2) advances (each a
“Growth Capital Advance” and collectively the “Growth Capital Advances”) available to Borrower in an amount not to exceed the Growth Capital Advance Amount.” 

	 	3	The Loan Agreement shall be amended by deleting the text appearing in Section 2.1.5(c) (Repayment) thereof: 

“Commencing on April 2, 2012 and continuing on each Payment Date thereafter, Borrower shall repay each Growth Capital Advance in
(i) thirty-six (36) equal monthly installments of principal, plus (ii) monthly payments of accrued interest at the rate set forth in Section 2.3(a)(ii).” 

and inserting in lieu thereof the following: 

“Commencing on July 2, 2012 and continuing on each Payment Date thereafter, Borrower shall repay each Growth Capital Advance in
(i) thirty-six (36) equal monthly installments of principal, plus (ii) monthly payments of accrued interest at the rate set forth in Section 2.3(a)(ii).” 

 

	 	4	The Loan Agreement shall be amended by deleting the following provision appearing as Section 2.2 (Overadvances) thereof: 

“2.2 Overadvances. If, at any time, the sum of (a) the outstanding principal amount of any Advances (including any amounts
used for Cash Management Services), plus (b) the face amount of any outstanding Letters of Credit (including drawn but unreimbursed Letters of Credit and any Letter of Credit Reserve), plus (c) the FX Reduction Amount exceeds the lesser of
either the Revolving Line or the Borrowing Base, Borrower shall immediately pay to Bank in cash such excess.” 
 and inserting in lieu
thereof the following: 
 “2.2 Overadvances. If, at any time, the outstanding principal amount of any Advances exceeds the
lesser of either the Revolving Line or the Borrowing Base, Borrower shall immediately pay to Bank in cash such excess.” 
  

	 	5	The Loan Agreement shall be amended by deleting the following appearing as Section 2.3(a)(i) (Interest Rate) thereof: 

“(i) Advances. Subject to Section 2.3(b), the principal amount outstanding under the Revolving Line shall accrue interest at
a floating per annum rate equal to one and one half of one percentage point (1.50%) above the Prime Rate, which interest shall be payable monthly in accordance with Section 2.3(f) below.” 

 and inserting in lieu thereof the following: 

“(i) Advances. Subject to Section 2.3(b), the principal amount outstanding under the Revolving Line shall accrue interest at
a floating per annum rate equal to (a) prior to the 2012 Effective Date, one and one half of one percentage point (1.50%) above the Prime Rate, and (b) on and after the 2012 Effective Date, two percentage points (2.0%) above the
Prime Rate, which interest, in each case, shall be payable monthly in accordance with Section 2.3(f) below.” 
  

	 	6	The Loan Agreement shall be amended by deleting the following provision appearing as Section 2.4(d) (Letter of Credit Fee) thereof: 

“(d) Letter of Credit Fee. Bank’s customary fees and expenses for the issuance or renewal of Letters of Credit, upon the
issuance of such Letter of Credit, each anniversary of the issuance during the term of such Letter of Credit, and upon the renewal of such Letter of Credit by Bank; and” 

and inserting in lieu thereof the following: 

“(d) Intentionally Omitted.; and” 
  

	 	7	The Loan Agreement shall be amended by deleting the following provision appearing as Section 3.4(a) (Procedures for Borrowing) thereof: 

“(a) Advances. Subject to the prior satisfaction of all other applicable conditions to the making of an Advance set forth in this
Agreement, to obtain an Advance (other than Advances under Sections 2.1.2 or 2.1.4), Borrower shall notify Bank (which notice shall be irrevocable) by electronic mail, facsimile, or telephone by 12:00 p.m. Eastern time on the Funding Date of the
Advance. Together with any such electronic or facsimile notification, Borrower shall deliver to Bank by electronic mail or facsimile a completed Payment/Advance Form executed by a Responsible Officer or his or her designee. Bank may rely on any
telephone notice given by a person whom Bank believes is a Responsible Officer or designee. Bank shall credit Advances to the Designated Deposit Account. Bank may make Advances under this Agreement based on instructions from a Responsible Officer or
his or her designee or without instructions if the Advances are necessary to meet Obligations which have become due.” 
 and inserting
in lieu thereof the following: 
 “(a) Advances. Subject to the prior satisfaction of all other applicable conditions to the
making of an Advance set forth in this Agreement, to obtain an Advance, Borrower shall notify Bank (which notice shall be irrevocable) by electronic mail, facsimile, or 

 
telephone by 12:00 p.m. Eastern time on the Funding Date of the Advance. Together with any such electronic or facsimile notification, Borrower shall deliver to Bank by electronic mail or
facsimile a completed Payment/Advance Form executed by a Responsible Officer or his or her designee. Bank may rely on any telephone notice given by a person whom Bank believes is a Responsible Officer or designee. Bank shall credit Advances to the
Designated Deposit Account. Bank may make Advances under this Agreement based on instructions from a Responsible Officer or his or her designee or without instructions if the Advances are necessary to meet Obligations which have become due.”

  

	 	8	The Loan Agreement shall be amended by inserting the following text to appear at the end of Section 4.1 (Grant of Security Interest) thereof: 

“Borrower acknowledges that it previously has entered, and/or may in the future enter, into Bank Services Agreements with Bank.
Regardless of the terms of any Bank Services Agreement, Borrower agrees that any amounts Borrower owes Bank thereunder shall be deemed to be Obligations hereunder and that it is the intent of Borrower and Bank to have all such Obligations secured by
the first priority perfected security interest in the Collateral granted herein (subject only to Permitted Liens that expressly have superior priority to Bank’s Lien in this Agreement). In the event (a) all Obligations (other than inchoate
indemnity obligations), except for Bank Services, are satisfied in full, and (b) this Agreement is terminated, Bank shall terminate the security interest granted herein upon Borrower providing cash collateral acceptable to Bank in its good
faith business judgment for Bank Services, if any. In the event such Bank Services consist of outstanding Letters of Credit, then on such date Borrower shall provide to Bank cash collateral in an amount equal to (i) one hundred five percent
(105.0%) of the face amount of all such Letters of Credit denominated in Dollars and (ii) one hundred ten percent (110.0%) of the Dollar Equivalent of the face amount of all such Letters of Credit denominated in a Foreign Currency
plus, in each case, all interest, fees, and costs due or to become due in connection therewith (as estimated by Bank in its good faith business judgment), to secure all of the Obligations relating to such Letters of Credit.” 

 

	 	9	The Loan Agreement shall be amended by inserting the following provision to appear as Section 6.10 (Access to Collateral; Books and Records) thereof: 

“6.10 Access to Collateral; Books and Records. Allow Bank, or its agents, to inspect the Collateral and audit and copy

 
Borrower’s Books. Such inspections or audits shall be conducted no more often than once every twelve (12) months unless an Event of Default has occurred and is continuing. The foregoing
inspections and audits shall be at Borrower’s expense. Borrower acknowledges, confirms, and agrees that the Initial Audit shall occur within ninety (90) days of the 2012 Effective Date.” 

 

	 	10	The Loan Agreement shall be amended by inserting the following text at the end of Section 12.8 (Survival) thereof: 

“Without limiting the foregoing, except as otherwise provided in Section 4.1, the grant of security interest by Borrower in
Section 4.1 shall survive until the termination of all Bank Services Agreements.” 
  

	 	11	The Loan Agreement shall be amended by deleting the following definitions appearing in 13.1 thereof: 

““Availability Amount” is (a) the lesser of (i) the Revolving Line or (ii) the amount available under the
Borrowing Base minus (b) the Dollar Equivalent amount of all outstanding Letters of Credit (including drawn but unreimbursed Letters of Credit) plus an amount equal to the Letter of Credit Reserve, minus (c) the FX Reduction Amount, minus
(d) any amounts used for Cash Management Services, and minus (e) the outstanding principal balance of any Advances.” 

““Borrowing Base” is (a) eighty percent (80%) of Eligible Accounts, as determined by Bank from Borrower’s
most recent Borrowing Base Certificate plus (b) the lesser of (i) One Million Dollars ($1,000,000) and (ii) fifty percent (50%) of Eligible Purchase Orders, provided, however, that Bank may decrease the foregoing percentages in
its good faith business judgment based on events, conditions, contingencies, or risks which, as determined by Bank, may adversely affect Collateral.” 

““Credit Extension” is any Advance, Growth Capital Advance, Letter of Credit, FX Forward Contract, amount utilized for
Cash Management Services, or any other extension of credit by Bank for Borrower’s benefit.” 
 ““Draw
Period” is the period of time from the Effective Date through the earlier to occur of (a) March 31, 2012 or (b) an Event of Default.” 

““FX Forward Contract” is defined in Section 2.1.3.” 

 ““Growth Capital Advance Amount” is an amount not to exceed Three Million
Dollars ($3,000,000) in the aggregate, available as follows: 
 (i) from the Effective Date through the Draw Period, One Million Dollars
($1,000,000), in the aggregate; 
 (ii) upon the occurrence of the First Milestone Event through the Draw Period, Two Million Dollars
($2,000,000) in the aggregate (inclusive of the original principal amount of any Growth Capital Advances made by Bank to Borrower); and 

(iii) upon the occurrence of the Second Milestone Event (but regardless of whether the First Milestone Event has occurred) through the Draw
Period, Three Million Dollars ($3,000,000) in the aggregate (inclusive of the original principal amount of any Growth Capital Advances made by Bank to Borrower).” 

“Growth Capital Maturity Date” is March 1, 2015.”” 

““Letter of Credit” means a standby letter of credit issued by Bank or another institution based upon an application,
guarantee, indemnity or similar agreement on the part of Bank as set forth in Section 2.1.2.” 
 ““Loan
Documents” are, collectively, this Agreement, the Warrant, the Perfection Certificate, any note, or notes or guaranties executed by Borrower, and any other present or future agreement between Borrower and/or for the benefit of Bank in
connection with this Agreement, all as amended, restated, or otherwise modified.” 
 ““Obligations” are
Borrower’s obligations to pay when due any debts, principal, interest, Bank Expenses and other amounts Borrower owes Bank now or later, whether under this Agreement, the Loan Documents (other than the Warrant), or otherwise, including, without
limitation, all obligations relating to letters of credit (including reimbursement obligations for drawn and undrawn letters of credit), cash management services, and foreign exchange contracts, if any, and including interest accruing after
Insolvency Proceedings begin and debts, liabilities, or obligations of Borrower assigned to Bank, and to perform Borrower’s duties under the Loan Documents (other than the Warrant).” 

““Revolving Line” is an Advance or Advances in an amount equal to Five Million Dollars ($5,000,000.00).” 

 and inserting in lieu thereof the following: 

““Availability Amount” is (a) the lesser of (i) the Revolving Line or (ii) the amount available under the
Borrowing Base minus (b) the outstanding principal balance of any Advances.” 
 ““Borrowing Base” is
(a) eighty percent (80%) of Eligible Accounts, as determined by Bank from Borrower’s most recent Borrowing Base Certificate plus (b) the lesser of (i) Two Million Dollars ($2,000,000) and (ii) fifty percent
(50.0%) of Eligible Purchase Orders and fifty percent (50.0%) of Eligible Inventory, provided, however, that Bank may decrease the foregoing amounts in its good faith business judgment based on events, conditions, contingencies, or risks
which, as determined by Bank, may adversely affect Collateral.” 
 ““Credit Extension” is any Advance, Growth
Capital Advance, or any other extension of credit by Bank for Borrower’s benefit.” 
 ““Draw Period” is the
period of time from the Effective Date through the earlier to occur of (a) June 30, 2012 or (b) an Event of Default.” 

““FX Forward Contract” is any foreign exchange contract by and between Borrower and Bank under which Borrower commits to
purchase from or sell to Bank a specific amount of Foreign Currency on a specified date.” 
 ““Growth Capital Advance
Amount” is an amount not to exceed Two Million Dollars ($2,000,000) in the aggregate, available as follows: 
 (i) from the
Effective Date throughout the Draw Period, One Million Dollars ($1,000,000), in the aggregate; and 
 (ii) upon the occurrence of the Second
Milestone Event throughout the Draw Period, Two Million Dollars ($2,000,000) in the aggregate (inclusive of the original principal amount of any Growth Capital Advances made by Bank to Borrower).” 

““Growth Capital Maturity Date” is June 1, 2015.” 

““Letter of Credit” is a standby or commercial letter of credit issued by Bank upon request of Borrower based upon an
application, guarantee, indemnity or similar agreement.” 
 ““Loan Documents” are, collectively, this Agreement,
the Warrant, the Perfection Certificate, any Bank Services Agreement, any subordination agreement, any note, or notes or guaranties executed by Borrower, and any other present or future agreement between Borrower and/or for the benefit of Bank, all
as amended, restated, or otherwise modified.” 

 ““Obligations” are Borrower’s obligations to pay when due any debts,
principal, interest, Bank Expenses and other amounts Borrower owes Bank now or later, whether under this Agreement, the Loan Documents (other than the Warrant), or otherwise, including, without limitation, any interest accruing after Insolvency
Proceedings begin and debts, liabilities, or obligations of Borrower assigned to Bank, and to perform Borrower’s duties under the Loan Documents (other than the Warrant).” 

““Revolving Line” is an Advance or Advances in an amount equal to Six Million Dollars ($6,000,000.00).” 

 

	 	12	The Loan Agreement shall be amended by inserting the following new definitions to appear alphabetically in Section 13.1 thereof: 

““2012 Effective Date” is March 13, 2012.” 

““Bank Services” are any products, credit services, and/or financial accommodations previously, now, or hereafter
provided to Borrower or any of its Subsidiaries by Bank or any Bank Affiliate, including, without limitation, any letters of credit, cash management services (including, without limitation, merchant services, direct deposit of payroll, business
credit cards, and check cashing services), interest rate swap arrangements, and foreign exchange services as any such products or services may be identified in Bank’s various agreements related thereto (each, a “Bank Services
Agreement”).” 
 ““Bank Services Agreement” is defined in the definition entitled “Bank
Services” appearing alphabetically in this Section 13.1.” 
 ““Eligible Inventory” means, at any time, the
aggregate of Borrower’s Inventory that (a) consists of finished goods and raw materials located in the United States in good, new, and salable condition, which are not comprised of slow moving, obsolete, work in progress or demo inventory;
(b) meets all applicable governmental standards; (c) has been manufactured in compliance with the Fair Labor Standards Act; (d) is not subject to any Liens, except the first priority Liens granted or in favor of Bank under this
Agreement or any of the other Loan Documents; (e) is located at Borrower’s principal place of business (or any location permitted under Section 5.2 and subject to a landlord’s consent or bailee waiver, as applicable, in form and
substance acceptable to Bank, in its sole discretion); (f) is destined for locations in the United States of purchasers organized in the United States; and (g) is otherwise acceptable to Bank in all respects.” 

 ““Initial Audit” is Bank’s inspection of Borrower’s Accounts,
the Collateral, and Borrower’s Books with results satisfactory to Bank in its sole and absolute discretion.” 
  

	 	13	The Borrowing Base Certificate appearing as Exhibit D to the Loan Agreement is hereby replaced with the Borrowing Base Certificate attached as Schedule 1 hereto. 

4. FEES. Borrower shall pay to Bank a modification fee equal to Three Thousand Dollars ($3,000), which fee shall be due on the date hereof and shall be
deemed fully earned as of the date hereof. Borrower shall also reimburse Bank for all legal fees and expenses incurred in connection with this amendment to the Existing Loan Documents. 

5. RATIFICATION OF PERFECTION CERTIFICATE. Borrower hereby ratifies, confirms and reaffirms, all and singular, the terms and disclosures contained in a
certain Perfection Certificate dated as of June 9, 2011 between Borrower and Bank, and acknowledges, confirms and agrees the disclosures and information above Borrower provided to Bank in the Perfection Certificate has not changed, as of the
date hereof. 
 6. CONSISTENT CHANGES. The Existing Loan Documents are hereby amended wherever necessary to reflect the changes described above. 

7. RATIFICATION OF LOAN DOCUMENTS. Borrower hereby ratifies, confirms, and reaffirms all terms and conditions of all security or other collateral
granted to the Bank, and confirms that the indebtedness secured thereby includes, without limitation, the Obligations. 
 8. NO DEFENSES OF BORROWER.
Borrower hereby acknowledges and agrees that Borrower has no offsets, defenses, claims, or counterclaims against Bank with respect to the Obligations, or otherwise, and that if Borrower now has, or ever did have, any offsets, defenses, claims, or
counterclaims against Bank, whether known or unknown, at law or in equity, all of them are hereby expressly WAIVED and Borrower hereby RELEASES Bank from any liability thereunder. 

9. CONTINUING VALIDITY. Borrower understands and agrees that in modifying the existing Obligations, Bank is relying upon Borrower’s
representations, warranties, and agreements, as set forth in the Existing Loan Documents. Except as expressly modified pursuant to this Loan Modification Agreement, the terms of the Existing Loan Documents remain unchanged and in full force and
effect. Bank’s agreement to modifications to the existing Obligations pursuant to this Loan Modification Agreement in no way shall obligate Bank to make any future modifications to the Obligations. Nothing in this Loan Modification Agreement
shall constitute a satisfaction of the Obligations. It is the intention of Bank and Borrower to retain as liable parties all makers of Existing Loan Documents, unless the party is expressly released by Bank in writing. No maker will be released by
virtue of this Loan Modification Agreement. 

 10. COUNTERSIGNATURE. This Loan Modification Agreement shall become effective only when it shall have been
executed by Borrower and Bank. 
 [The remainder of this page is intentionally left blank] 

 This Loan Modification Agreement is executed as a sealed instrument under the laws of the
Commonwealth of Massachusetts as of the date first written above. 
  

									
	BORROWER:	 		 	BANK:
			
	ACACIA COMMUNICATIONS, INC.	 		 	SILICON VALLEY BANK
					
	By:	 	 /s/ Raj Shanmugaraj
	 		 	By:	 	 /s/ Dan Allred

					
	Name:	 	 Raj Shanmugaraj
	 		 	Name:	 	 Dan Allred

					
	Title:	 	 President and CEO
	 		 	Title:	 	 Sr. Relationship Manager

 Schedule 1 

EXHIBIT C - BORROWING BASE CERTIFICATE 

Borrower: Acacia Communications, Inc. 
 Lender: Silicon Valley
Bank 
 Commitment Amount: $6,000,000.00 
  

							
	ACCOUNTS RECEIVABLE	  
	1.	  	Accounts Receivable (invoiced) Book Value as of                     	  	$	            	  
	2.	  	Additions (please explain on next page)	  	$	 	  
	3.	  	Less: Intercompany / Employee / Non-Trade Accounts	  	$	 	  
	4.	  	NET TRADE ACCOUNTS RECEIVABLE	  	$	 	  
		
	ACCOUNTS RECEIVABLE DEDUCTIONS (without duplication)	  			
	5.	  	90 Days Past Invoice Date	  	$	 	  
	6.	  	Credit Balances over 90 Days	  	$	 	  
	7.	  	Balance of 50% over 90 Day Accounts (cross-age or current affected)	  	$	 	  
	8.	  	Foreign Account Debtor Accounts (except for Eligible Foreign Accounts)	  	$	 	  
	9.	  	Foreign Invoiced and/or Collected Accounts	  	$	 	  
	10.	  	Contra/Customer Deposit Accounts	  	$	 	  
	11.	  	U.S. Government Accounts	  	$	 	  
	12.	  	Promotion or Demo Accounts; Guaranteed Sale or Consignment Sale Accounts	  	$	 	  
	13.	  	Accounts with Memo or Pre-Billings	  	$	 	  
	14.	  	Contract Accounts; Accounts with Progress/Milestone Billings	  	$	 	  
	15.	  	Accounts for Retainage Billings	  	$	 	  
	16.	  	Trust / Bonded Accounts	  	$	 	  
	17.	  	Bill and Hold Accounts	  	$	 	  
	18.	  	Unbilled Accounts	  	$	 	  
	19.	  	Non-Trade Accounts (if not already deducted above)	  	$	 	  
	20.	  	Accounts with Extended Term Invoices (Net 90+)	  	$	 	  
	21.	  	Chargebacks Accounts / Debit Memos	  	$	 	  
	22.	  	Product Returns/Exchanges	  	$	 	  
	23.	  	Disputed Accounts; Insolvent Account Debtor Accounts	  	$	 	  
	24.	  	Deferred Revenue, if applicable/Other (please explain on next page)	  	$	 	  
	25.	  	Concentration Limits 25% (except for Specified Accounts)	  	$	 	  
	26.	  	TOTAL ACCOUNTS RECEIVABLE DEDUCTIONS	  	$	 	  
	27.	  	Eligible Accounts (#4 minus #26)	  	$	 	  
	28.	  	ELIGIBLE AMOUNT OF ACCOUNTS (80% of #27)	  	$	 	  
	29.	  	ELIGIBLE PURCHASE ORDERS	  	$	 	  
	30.	  	ELIGIBLE INVENTORY	  	$	 	  
	31.	  	 ELIGIBLE AMOUNT OF PURCHASE ORDERS AND INVENTORY (50% OF #29 AND #30, NOT TO EXCEED $2,000,000)
	  	$	 	  
	BALANCES	  			
	32.	  	Maximum Loan Amount	  	$	 	  
	33.	  	Total Funds Available (Lesser of #32 or (#28 plus #31))	  	$	 	  
	34.	  	Present balance owing on Line of Credit	  	$	 	  
	35.	  	RESERVE POSITION (#32 minus #33 and #34)	  	$	 	  

 [Continued on following page.] 

 Explanatory comments from previous page: 

 

	
	  

	
	  

	
	  

	
	  

 The undersigned represents and warrants that this is true, complete and correct, and that the information in this Borrowing
Base Certificate complies with the representations and warranties in the Loan and Security Agreement between the undersigned and Silicon Valley Bank. 

 

			
	COMMENTS:
		
	By:	 	  

		 	Authorized Signer
	Date:	 	  

 

					
	BANK USE ONLY
		
	Received by:	 	  

		 	AUTHORIZED SIGNER
		
	Date	 	  

	Verified:	 	  

		 	AUTHORIZED SIGNER
		
	Date:	 	  

	Compliance Status:	 	Yes            No     

 
 

 SECOND LOAN MODIFICATION AGREEMENT 

This Second Loan Modification Agreement (this “Loan Modification Agreement”) is entered into as of June 8, 2012, by and between
SILICON VALLEY BANK, a California corporation, with its principal place of business at 3003 Tasman Drive, Santa Clara, California 95054 and with a loan production office located at 275 Grove Street, Suite 2-200, Newton, Massachusetts 02466
(“Bank”) and ACACIA COMMUNICATIONS, INC., a Delaware corporation (“Borrower”). 
 1. DESCRIPTION OF EXISTING INDEBTEDNESS AND
OBLIGATIONS. Among other indebtedness and obligations which may be owing by Borrower to Bank, Borrower is indebted to Bank pursuant to a loan arrangement dated as of June 9, 2011, evidenced by, among other documents, a certain Loan and
Security Agreement dated as of June 9, 2011, between Borrower and Bank, as amended by that certain First Loan Modification Agreement dated as of March 13, 2012, between Borrower and Bank (as amended, the “Loan Agreement”).
Capitalized terms used but not otherwise defined herein shall have the same meaning as in the Loan Agreement. 
 2. DESCRIPTION OF COLLATERAL.
Repayment of the Obligations is secured by the Collateral as described in the Loan Agreement (together with any other collateral security granted to Bank, the “Security Documents”). Hereinafter, the Security Documents, together with all
other documents evidencing or securing the Obligations shall be referred to as the “Existing Loan Documents”. 
 3. DESCRIPTION OF CHANGE IN
TERMS. 
  

	 	A.	Modifications to Loan Agreement. 

  

	 	1	The Loan Agreement shall be amended by deleting the following definitions appearing in 13.1 thereof: 

““Revolving Line Maturity Date” is June 8, 2012.” 

and inserting in lieu thereof the following: 

““Revolving Line Maturity Date” is July 8, 2012.” 

4. FEES. Borrower shall pay to Bank a modification fee equal to One Thousand Dollars ($1,000), which fee shall be due on the date hereof and shall be
deemed fully earned as of the date hereof. Borrower shall also reimburse Bank for all legal fees and expenses incurred in connection with this amendment to the Existing Loan Documents. 

5. RATIFICATION OF PERFECTION CERTIFICATE. Borrower hereby ratifies, confirms and reaffirms, all and singular, the terms and disclosures contained in a
certain Perfection Certificate dated as of June 9, 2011 between Borrower and Bank, and acknowledges, confirms and agrees the disclosures and information above Borrower provided to Bank in the Perfection Certificate has not changed, as of the
date hereof; provided, however, that the Perfection Certificate shall be deemed updated to reflect Borrower’s lease of real property 

 
located at 1715 Route 35 N, Suite 207 Middletown, NJ 07748, including the maintenance of books, records, equipment and inventory at such location and the transaction of business and qualification
to transact business in the State of New Jersey. 
 6. CONSISTENT CHANGES. The Existing Loan Documents are hereby amended wherever necessary to
reflect the changes described above. 
 7. RATIFICATION OF LOAN DOCUMENTS. Borrower hereby ratifies, confirms, and reaffirms all terms and conditions
of all security or other collateral granted to the Bank, and confirms that the indebtedness secured thereby includes, without limitation, the Obligations. 

8. NO DEFENSES OF BORROWER. Borrower hereby acknowledges and agrees that Borrower has no offsets, defenses, claims, or counterclaims against Bank with
respect to the Obligations, or otherwise, and that if Borrower now has, or ever did have, any offsets, defenses, claims, or counterclaims against Bank, whether known or unknown, at law or in equity, all of them are hereby expressly WAIVED and
Borrower hereby RELEASES Bank from any liability thereunder. 
 9. CONTINUING VALIDITY. Borrower understands and agrees that in modifying the
existing Obligations, Bank is relying upon Borrower’s representations, warranties, and agreements, as set forth in the Existing Loan Documents. Except as expressly modified pursuant to this Loan Modification Agreement, the terms of the Existing
Loan Documents remain unchanged and in full force and effect. Bank’s agreement to modifications to the existing Obligations pursuant to this Loan Modification Agreement in no way shall obligate Bank to make any future modifications to the
Obligations. Nothing in this Loan Modification Agreement shall constitute a satisfaction of the Obligations. It is the intention of Bank and Borrower to retain as liable parties all makers of Existing Loan Documents, unless the party is expressly
released by Bank in writing. No maker will be released by virtue of this Loan Modification Agreement. 
 10. COUNTERSIGNATURE. This Loan Modification
Agreement shall become effective only when it shall have been executed by Borrower and Bank. 
 [The remainder of this page is
intentionally left blank] 

  
 - 2 - 

 This Loan Modification Agreement is executed as a sealed instrument under the laws of the
Commonwealth of Massachusetts as of the date first written above. 
  

									
	BORROWER:	 		 	BANK:
			
	ACACIA COMMUNICATIONS, INC.	 		 	SILICON VALLEY BANK
					
	By:	 	 /s/ Raj Shanmugaraj
	 		 	By:	 	 /s/ Glen R. Mello

					
	Name:	 	 Raj Shanmugaraj
	 		 	Name:	 	 Glen R. Mello

					
	Title:	 	 President and CEO
	 		 	Title:	 	 DTL

  
 - 3 - 

 THIRD LOAN MODIFICATION AGREEMENT 

This Third Loan Modification Agreement (this “Loan Modification Agreement”) is entered into as of July 10, 2012, but is
effective as of July 8, 2012, by and between SILICON VALLEY BANK, a California corporation, with its principal place of business at 3003 Tasman Drive, Santa Clara, California 95054 and with a loan production office located at 275 Grove
Street, Suite 2-200, Newton, Massachusetts 02466 (“Bank”) and ACACIA COMMUNICATIONS, INC., a Delaware corporation (“Borrower”). 

1. DESCRIPTION OF EXISTING INDEBTEDNESS AND OBLIGATIONS. Among other indebtedness and obligations which may be owing by Borrower to Bank, Borrower is
indebted to Bank pursuant to a loan arrangement dated as of June 9, 2011, evidenced by, among other documents, a certain Loan and Security Agreement dated as of June 9, 2011, between Borrower and Bank, as amended by that certain First Loan
Modification Agreement dated as of March 13, 2012, between Borrower and Bank, and as further amended by that certain Second Loan Modification Agreement dated as of June 8, 2012, between Borrower and Bank (as amended, the “Loan
Agreement”). Capitalized terms used but not otherwise defined herein shall have the same meaning as in the Loan Agreement. 
 2. DESCRIPTION OF
COLLATERAL. Repayment of the Obligations is secured by the Collateral as described in the Loan Agreement (together with any other collateral security granted to Bank, the “Security Documents”). Hereinafter, the Security Documents,
together with all other documents evidencing or securing the Obligations shall be referred to as the “Existing Loan Documents”. 
 3.
DESCRIPTION OF CHANGE IN TERMS. 
  

	 	A.	Modifications to Loan Agreement. 

  

	 	1	The Loan Agreement shall be amended by deleting the following definition appearing in 13.1 thereof: 

““Revolving Line Maturity Date” is July 8, 2012.” 

and inserting in lieu thereof the following: 

““Revolving Line Maturity Date” is August 7, 2012.” 

4. FEES. Borrower shall reimburse Bank for all legal fees and expenses incurred in connection with this amendment to the Existing Loan Documents. 

5. RATIFICATION OF PERFECTION CERTIFICATE. Borrower hereby ratifies, confirms and reaffirms, all and singular, the terms and disclosures contained in a
certain Perfection Certificate dated as of June 9, 2011 between Borrower and Bank, and acknowledges, confirms and agrees the disclosures and information above Borrower provided to Bank in the Perfection Certificate has not changed, as of the
date hereof. 

 6. CONSISTENT CHANGES. The Existing Loan Documents are hereby amended wherever necessary to reflect the
changes described above. 
 7. RATIFICATION OF LOAN DOCUMENTS. Borrower hereby ratifies, confirms, and reaffirms all terms and conditions of all
security or other collateral granted to the Bank, and confirms that the indebtedness secured thereby includes, without limitation, the Obligations. 
 8.
NO DEFENSES OF BORROWER. Borrower hereby acknowledges and agrees that Borrower has no offsets, defenses, claims, or counterclaims against Bank with respect to the Obligations, or otherwise, and that if Borrower now has, or ever did have, any
offsets, defenses, claims, or counterclaims against Bank, whether known or unknown, at law or in equity, all of them are hereby expressly WAIVED and Borrower hereby RELEASES Bank from any liability thereunder. 

9. CONTINUING VALIDITY. Borrower understands and agrees that in modifying the existing Obligations, Bank is relying upon Borrower’s
representations, warranties, and agreements, as set forth in the Existing Loan Documents. Except as expressly modified pursuant to this Loan Modification Agreement, the terms of the Existing Loan Documents remain unchanged and in full force and
effect. Bank’s agreement to modifications to the existing Obligations pursuant to this Loan Modification Agreement in no way shall obligate Bank to make any future modifications to the Obligations. Nothing in this Loan Modification Agreement
shall constitute a satisfaction of the Obligations. It is the intention of Bank and Borrower to retain as liable parties all makers of Existing Loan Documents, unless the party is expressly released by Bank in writing. No maker will be released by
virtue of this Loan Modification Agreement. 
 10. COUNTERSIGNATURE. This Loan Modification Agreement shall become effective only when it shall have
been executed by Borrower and Bank. 
 [The remainder of this page is intentionally left blank] 

  
 - 2 - 

 This Loan Modification Agreement is executed as a sealed instrument under the laws of the
Commonwealth of Massachusetts as of the date first written above. 
  

									
	BORROWER:	 		 	BANK:
			
	ACACIA COMMUNICATIONS, INC.	 		 	SILICON VALLEY BANK
					
	By:	 	 /s/ Raj Shanmugaraj
	 		 	By:	 	 /s/ Dan Allred

					
	Name:	 	 Raj Shanmugaraj
	 		 	Name:	 	 Dan Allred

					
	Title:	 	 President and CEO
	 		 	Title:	 	 Senior Relationship Manager

  
 - 3 - 

 FOURTH LOAN MODIFICATION AGREEMENT 

This Fourth Loan Modification Agreement (this “Loan Modification Agreement”) is entered into as of September 20, 2012, but is
effective as of August 7, 2012, by and between SILICON VALLEY BANK, a California corporation, with its principal place of business at 3003 Tasman Drive, Santa Clara, California 95054 and with a loan production office located at 275 Grove
Street, Suite 2-200, Newton, Massachusetts 02466 (“Bank”) and ACACIA COMMUNICATIONS, INC., a Delaware corporation (“Borrower”). 

1. DESCRIPTION OF EXISTING INDEBTEDNESS AND OBLIGATIONS. Among other indebtedness and obligations which may be owing by Borrower to Bank, Borrower is
indebted to Bank pursuant to a loan arrangement dated as of June 9, 2011, evidenced by, among other documents, a certain Loan and Security Agreement dated as of June 9, 2011, between Borrower and Bank, as amended by that certain First Loan
Modification Agreement dated as of March 13, 2012, between Borrower and Bank, as amended by that certain Second Loan Modification Agreement dated as of June 8, 2012, between Borrower and Bank, and as further amended by that certain Third
Loan Modification Agreement dated as of July 10, 2012, between Borrower and Bank (as amended, the “Loan Agreement”). Capitalized terms used but not otherwise defined herein shall have the same meaning as in the Loan Agreement. 

2. DESCRIPTION OF COLLATERAL. Repayment of the Obligations is secured by the Collateral as described in the Loan Agreement (together with any other
collateral security granted to Bank, the “Security Documents”). Hereinafter, the Security Documents, together with all other documents evidencing or securing the Obligations shall be referred to as the “Existing Loan Documents”.

 3. DESCRIPTION OF CHANGE IN TERMS. 
  

	 	A.	Modifications to Loan Agreement. 

  

	 	1.	The Loan Agreement shall be amended by deleting the following text appearing in Section 2.1.5(a) (Availability) thereof: 

“Borrower may prepay any Growth Capital Advance at any time without premium or penalty.” 

 

	 	2.	The Loan Agreement shall be amended by deleting the following text appearing in Section 2.1.5(c) (Repayment) thereof: 

“Commencing on July 2, 2012 and continuing on each Payment Date thereafter, Borrower shall repay each Growth Capital Advance in
(i) thirty-six (36) equal monthly installments of principal, plus (ii) monthly payments of accrued interest at the rate set forth in Section 2.3(a)(ii).” 

 and inserting in lieu thereof the following: 

“Commencing on April 1, 2013 and continuing on each Payment Date thereafter, Borrower shall repay each Growth Capital Advance in
(i) thirty-six (36) equal monthly installments of principal, plus (ii) monthly payments of accrued interest at the rate set forth in Section 2.3(a)(ii).” 

 

	 	3.	The Loan Agreement shall be amended by deleting the following provision appearing as Section 6.2(d) (Monthly Compliance Certificate) thereof: 

“(d) Monthly Compliance Certificate. Within thirty (30) days after the last day of each month and together with the Monthly
Financial Statements, a duly completed Compliance Certificate signed by a Responsible Officer, certifying that as of the end of such month, Borrower was in full compliance with all of the terms and conditions of this Agreement, and such other
information as Bank may reasonably request;” 
 and inserting in lieu thereof the following: 

“(d) Monthly Compliance Certificate. Within thirty (30) days after the last day of each month and together with the Monthly
Financial Statements, a duly completed Compliance Certificate signed by a Responsible Officer, certifying that as of the end of such month, Borrower was in full compliance with all of the terms and conditions of this Agreement, and setting forth
calculations showing compliance with the financial covenant set forth in this Agreement and such other information as Bank may reasonably request;” 
  

	 	4.	The Loan Agreement shall be amended by deleting the following text appearing in Section 6.10 (Access to Collateral; Books and Records) thereof: 

“Borrower acknowledges, confirms, and agrees that the Initial Audit shall occur within ninety (90) days of the 2012 Effective
Date.” 
 and inserting in lieu thereof the following: 

“Borrower acknowledges, confirms, and agrees that the Initial Audit shall occur within ninety (90) days of the Fourth Amendment
Effective Date.” 
  

	 	5.	The Loan Agreement shall be amended by inserting the following new provision, appearing as Section 6.11 (Financial Covenant) thereof: 

“6.11 Financial Covenant. Maintain at all times, once a Growth Capital Advance is requested, to be tested as of the last day of
each month, calculated on a consolidated basis with respect to Borrower and its Subsidiaries, a Tangible Net Worth of at least Seven Million Five Hundred Thousand Dollars ($7,500,000.00).” 

  
 2 

	 	6.	The Loan Agreement shall be amended by deleting the following provision appearing as Section 8.2(a) (Covenant Default) thereof: 

“(a) Borrower fails or neglects to perform any obligation in Sections 6.2, 6.4, 6.5, 6.6, or 6.7(b) or violates any covenant in
Section 7; or” 
 and inserting in lieu thereof the following: 

“(a) Borrower fails or neglects to perform any obligation in Sections 6.2, 6.4, 6.5, 6.6, 6.7(b), or 6.11, or violates any covenant in
Section 7; or” 
  

	 	7.	The Loan Agreement shall be amended by inserting the following text to appear as subsection (d) of the definition entitled “Material Adverse Change” appearing in Section 13.1 thereof:

 “or (d) Bank determines, based upon information available to it and in its reasonable judgment, that there is a
reasonable likelihood that Borrower shall fail to comply with one or more of the financial covenants in Section 6 during the next succeeding financial reporting period.” 

 

	 	8.	The Loan Agreement shall be amended by deleting the following provision appearing as subsection (v) of the definition entitled “Eligible Accounts” appearing in Section 13.1 thereof:

 “(v) Accounts owing from an Account Debtor, including Affiliates, whose total obligations to Borrower exceed
twenty-five percent (25%) of all Accounts, for the amounts that exceed that percentage (except for Specified Accounts), unless Bank approves in writing on a case by case basis in its sole and absolute discretion; and” 

and inserting in lieu thereof the following: 

“(v) Accounts owing from an Account Debtor, including Affiliates, whose total obligations to Borrower exceed twenty-five percent
(25%) of all Accounts, for the amounts that exceed that percentage (except for Specified Accounts, for which such percentage is fifty percent (50%)), unless Bank approves in writing on a case by case basis in its sole and absolute discretion;
and” 

  
 3 

	 	9.	The Loan Agreement shall be amended by deleting the following definitions appearing in 13.1 thereof: 

““Borrowing Base” is (a) eighty percent (80%) of Eligible Accounts, as determined by Bank from Borrower’s
most recent Borrowing Base Certificate plus (b) the lesser of (i) Two Million Dollars ($2,000,000) and (ii) fifty percent (50.0%) of Eligible Purchase Orders and fifty percent (50.0%) of Eligible Inventory, provided,
however, that Bank may decrease the foregoing amounts in its good faith business judgment based on events, conditions, contingencies, or risks which, as determined by Bank, may adversely affect Collateral.” 

““Draw Period” is the period of time from the Effective Date through the earlier to occur of (a) June 30, 2012
or (b) an Event of Default.” 
 ““Growth Capital Advance Amount” is an amount not to exceed Two Million
Dollars ($2,000,000) in the aggregate, available as follows: 
 (i) from the Effective Date throughout the Draw Period, One Million Dollars
($1,000,000), in the aggregate; and 
 (ii) upon the occurrence of the Second Milestone Event throughout the Draw Period, Two Million
Dollars ($2,000,000) in the aggregate (inclusive of the original principal amount of any Growth Capital Advances made by Bank to Borrower).” 

““Growth Capital Maturity Date” is June 1, 2015.” 

““Obligations” are Borrower’s obligations to pay when due any debts, principal, interest, Bank Expenses and other
amounts Borrower owes Bank now or later, whether under this Agreement, the Loan Documents (other than the Warrant), or otherwise, including, without limitation, any interest accruing after Insolvency Proceedings begin and debts, liabilities, or
obligations of Borrower assigned to Bank, and to perform Borrower’s duties under the Loan Documents (other than the Warrant).” 

““Revolving Line” is an Advance or Advances in an amount equal to Six Million Dollars ($6,000,000.00).” 

““Revolving Line Maturity Date” is August 7, 2012.” 

““Warrant” is that certain Warrant to Purchase Stock dated as of the Effective Date executed by Borrower in favor of
Bank.” 

  
 4 

 and inserting in lieu thereof the following: 

““Borrowing Base” is (a) eighty percent (80%) of Eligible Accounts, as determined by Bank from Borrower’s
most recent Borrowing Base Certificate plus (b) the lesser of (i) Two Million Dollars ($2,000,000.00) and (ii) fifty percent (50.0%) of Eligible Purchase Orders and fifty percent (50.0%) of Eligible Inventory, in each case
as determined by Bank from Borrower’s most recent Borrowing Base Certificate plus (c) only for times that Borrower has achieved the AQR Threshold, the lesser of (i) One Million Dollars ($1,000,000.00) and (ii) fifty percent
(50.0%) of Eligible Purchase Orders and fifty percent (50.0%) of Eligible Inventory, in each case as determined by Bank from Borrower’s most recent Borrowing Base Certificate, provided, however, that Bank may decrease the foregoing
amounts in its good faith business judgment based on events, conditions, contingencies, or risks which, as determined by Bank, may adversely affect Collateral.” 

““Draw Period” is the period of time from the Effective Date through the earlier to occur of (a) March 31,
2013 or (b) an Event of Default.” 
 ““Growth Capital Advance Amount” is an amount not to exceed Two Million
Dollars ($2,000,000.00) in the aggregate.” 
 ““Growth Capital Maturity Date” is March 1, 2016.” 

““Obligations” are Borrower’s obligations to pay when due any debts, principal, interest, Bank Expenses, and other
amounts Borrower owes Bank now or later, whether under this Agreement, the Loan Documents (other than the Warrant), or otherwise, including, without limitation, any interest accruing after Insolvency Proceedings begin and debts, liabilities, or
obligations of Borrower assigned to Bank, and to perform Borrower’s duties under the Loan Documents (other than the Warrant).” 

““Revolving Line” is an Advance or Advances in an amount equal to Eight Million Dollars ($8,000,000.00).” 

““Revolving Line Maturity Date” is August 6, 2013.” 

““Warrant” is that (a) certain Warrant to Purchase Stock dated as of the Effective Date executed by Borrower in
favor of Bank, and (b) certain Warrant to Purchase Stock dated as of the Fourth Amendment Effective Date executed by Borrower in favor of Bank.” 

  
 5 

	 	10.	The Loan Agreement shall be amended by inserting the following new definitions to appear alphabetically in Section 13.1 thereof: 

““Adjusted Quick Ratio” is the ratio of (a) Quick Assets to (b) Current Liabilities minus the current portion
of Deferred Revenue.” 
 ““AQR Threshold” means that Borrower has achieved as of the last day of the immediately
preceding month, calculated on a consolidated basis with respect to Borrower and its Subsidiaries, an Adjusted Quick Ratio of at least 1.25 to 1.00.” 

““Current Liabilities” are all obligations and liabilities of Borrower to Bank, plus, without duplication, the aggregate
amount of Borrower’s Total Liabilities that mature within one (1) year.” 
 ““Fourth Amendment Effective
Date” is September 20, 2012.” 
 ““Quick Assets” is, on any date, Borrower’s consolidated,
unrestricted cash maintained with Bank plus net billed accounts receivable, determined according to GAAP.” 
 ““Tangible
Net Worth” is, on any date, stockholder equity of Borrower, minus intangible assets, plus (c) Subordinated Debt.” 
  

	 	11.	The Borrowing Base Certificate appearing as Exhibit C to the Loan Agreement is hereby replaced with the Borrowing Base Certificate attached as Schedule 1 hereto. 

 

	 	12.	The Compliance Certificate appearing as Exhibit D to the Loan Agreement is hereby replaced with the Compliance Certificate attached as Schedule 2 hereto. 

4. FEES. Borrower shall pay to Bank (a) a Revolving Line commitment fee equal to Twenty Thousand Dollars ($20,000.00), and (b) a Growth
Capital Advance commitment fee equal to Five Thousand Dollars ($5,000.00), which fees shall be due on the date hereof and shall be deemed fully earned as of the date hereof. Borrower shall also reimburse Bank for all legal fees and expenses incurred
in connection with this amendment to the Existing Loan Documents. 
 5. RATIFICATION OF PERFECTION CERTIFICATE. Borrower hereby ratifies, confirms
and reaffirms, all and singular, the terms and disclosures contained in a certain Perfection Certificate dated as of June 9, 2011 between Borrower and Bank, and acknowledges, confirms and agrees the disclosures and information above Borrower
provided to Bank in the Perfection Certificate has not changed, as of the date hereof. 
 6. CONSISTENT CHANGES. The Existing Loan Documents are
hereby amended wherever necessary to reflect the changes described above. 

  
 6 

 7. RATIFICATION OF LOAN DOCUMENTS. Borrower hereby ratifies, confirms, and reaffirms all terms and
conditions of all security or other collateral granted to the Bank, and confirms that the indebtedness secured thereby includes, without limitation, the Obligations. 

8. NO DEFENSES OF BORROWER. Borrower hereby acknowledges and agrees that Borrower has no offsets, defenses, claims, or counterclaims against Bank with
respect to the Obligations, or otherwise, and that if Borrower now has, or ever did have, any offsets, defenses, claims, or counterclaims against Bank, whether known or unknown, at law or in equity, all of them are hereby expressly WAIVED and
Borrower hereby RELEASES Bank from any liability thereunder. 
 9. CONTINUING VALIDITY. Borrower understands and agrees that in modifying the
existing Obligations, Bank is relying upon Borrower’s representations, warranties, and agreements, as set forth in the Existing Loan Documents. Except as expressly modified pursuant to this Loan Modification Agreement, the terms of the Existing
Loan Documents remain unchanged and in full force and effect. Bank’s agreement to modifications to the existing Obligations pursuant to this Loan Modification Agreement in no way shall obligate Bank to make any future modifications to the
Obligations. Nothing in this Loan Modification Agreement shall constitute a satisfaction of the Obligations. It is the intention of Bank and Borrower to retain as liable parties all makers of Existing Loan Documents, unless the party is expressly
released by Bank in writing. No maker will be released by virtue of this Loan Modification Agreement. 
 10. COUNTERSIGNATURE. This Loan Modification
Agreement shall become effective only when it shall have been executed by Borrower and Bank. 
 [The remainder of this page is
intentionally left blank] 

  
 7 

 This Loan Modification Agreement is executed as a sealed instrument under the laws of the
Commonwealth of Massachusetts as of the date first written above. 
  

									
	BORROWER:	 		 	BANK:
			
	ACACIA COMMUNICATIONS, INC.	 		 	SILICON VALLEY BANK
					
	By:	 	 /s/ Raj Shanmogaraj
	 		 	By:	 	 /s/ Glen R. Mello

					
	Name:	 	 Raj Shanmogaraj
	 		 	Name:	 	 Glen R. Mello

					
	Title:	 	 President & CEO
	 		 	Title:	 	 DTL

 Schedule 1 

EXHIBIT C - BORROWING BASE CERTIFICATE 

Borrower: Acacia Communications, Inc. 
 Lender: Silicon Valley
Bank 
 Commitment Amount: $8,000,000.00 
  

							
	 ACCOUNTS RECEIVABLE
	   

	 1.
	  	 Accounts Receivable (invoiced) Book Value as of
                    
	  	$	            	  
	 2.
	  	 Additions (please explain on next page)
	  	$	 	  
	 3.
	  	 Less: Intercompany / Employee / Non-Trade Accounts
	  	$	 	  
	 4.
	  	 NET TRADE ACCOUNTS RECEIVABLE
	  	$	 	  
		
	 ACCOUNTS RECEIVABLE DEDUCTIONS (without duplication)
	  			
	 5.
	  	 90 Days Past Invoice Date
	  	$	 	  
	 6.
	  	 Credit Balances over 90 Days
	  	$	 	  
	 7.
	  	 Balance of 50% over 90 Day Accounts (cross-age or current affected)
	  	$	 	  
	 8.
	  	 Foreign Account Debtor Accounts (except for Eligible Foreign Accounts and the Specified Accounts)
	  	$	 	  
	 9.
	  	 Foreign Invoiced and/or Collected Accounts
	  	$	 	  
	 10.
	  	 Contra/Customer Deposit Accounts
	  	$	 	  
	 11.
	  	 U.S. Government Accounts
	  	$	 	  
	 12.
	  	 Promotion or Demo Accounts; Guaranteed Sale or Consignment Sale Accounts
	  	$	 	  
	 13.
	  	 Accounts with Memo or Pre-Billings
	  	$	 	  
	 14.
	  	 Contract Accounts; Accounts with Progress/Milestone Billings
	  	$	 	  
	 15.
	  	 Accounts for Retainage Billings
	  	$	 	  
	 16.
	  	 Trust / Bonded Accounts
	  	$	 	  
	 17.
	  	 Bill and Hold Accounts
	  	$	 	  
	 18.
	  	 Unbilled Accounts
	  	$	 	  
	 19.
	  	 Non-Trade Accounts (if not already deducted above)
	  	$	 	  
	 20.
	  	 Accounts with Extended Term Invoices (Net 90+)
	  	$	 	  
	 21.
	  	 Chargebacks Accounts / Debit Memos
	  	$	 	  
	 22.
	  	 Product Returns/Exchanges
	  	$	 	  
	 23.
	  	 Disputed Accounts; Insolvent Account Debtor Accounts
	  	$	 	  
	 24.
	  	 Deferred Revenue, if applicable/Other (please explain on next page)
	  	$	 	  
	 25.
	  	 Concentration Limits 25% (except for Specified Accounts)
	  	$	 	  
	 26.
	  	 TOTAL ACCOUNTS RECEIVABLE DEDUCTIONS
	  	$	 	  
	 27.
	  	 Eligible Accounts (#4 minus #26)
	  	$	 	  
	 28.
	  	 ELIGIBLE AMOUNT OF ACCOUNTS (80% of #27)
	  	$	 	  
	 29.
	  	 ELIGIBLE PURCHASE ORDERS
	  	$	 	  
	 30.
	  	 ELIGIBLE INVENTORY
	  			
	 31.
	  	 ELIGIBLE AMOUNT OF PURCHASE ORDERS (50% of #29 and #30, not to exceed $2,000,000)
	  	$	 	  
	 32.
	  	 ELIGIBLE AMOUNT OF PURCHASE ORDERS (50% of #29 and #30, not to exceed $1,000,000) (subject to the AQR Threshold)
	  	$	 	  
	 BALANCES
	  			
	 33.
	  	 Maximum Loan Amount
	  	$	 	  
	 34.
	  	 Total Funds Available (Lesser of #33 or (#28 plus #31 plus #32))
	  	$	 	  
	 35.
	  	 Present balance owing on Line of Credit
	  	$	 	  
	 36.
	  	 RESERVE POSITION (#34 minus #35)
	  	$	 	  

 [Continued on following page.] 

 Explanatory comments from previous page: 

 
  
  

 
  

 
  

 
 The undersigned represents and warrants that
this is true, complete and correct, and that the information in this Borrowing Base Certificate complies with the representations and warranties in the Loan and Security Agreement between the undersigned and Silicon Valley Bank. 

 

			
	COMMENTS:
		
	By:	 	  

		 	Authorized Signer
		
	Date:	 	  

					
	BANK USE ONLY
		
	Received by:	 	  

		 	AUTHORIZED SIGNER
	
	
	Date:	 	  

	Verified:	 	  

		 	AUTHORIZED SIGNER
		
	Date:	 	  

	Compliance Status:	 	Yes                No    

 
 

 Schedule 2 

EXHIBIT D 

COMPLIANCE CERTIFICATE 
  

					
	TO:	  	SILICON VALLEY BANK	  	Date:                     
	FROM:	  	ACACIA COMMUNICATIONS, INC.	  	

 The undersigned authorized officer of Acacia Communications, Inc. (“Borrower”) certifies that under the terms and
conditions of the Loan and Security Agreement between Borrower and Bank (the “Agreement”): 
 (1) Borrower is in complete compliance for the
period ending                     with all required covenants except as noted below; (2) there are no Events of Default; (3) all
representations and warranties in the Agreement are true and correct in all material respects on this date except as noted below; provided, however, that such materiality qualifier shall not be applicable to any representations and warranties that
already are qualified or modified by materiality in the text thereof; and provided, further that those representations and warranties expressly referring to a specific date shall be true, accurate and complete in all material respects as of such
date; (4) Borrower, and each of its Subsidiaries, has timely filed all required tax returns and reports, and Borrower has timely paid all foreign, federal, state and local taxes, assessments, deposits and contributions owed by Borrower except
as otherwise permitted pursuant to the terms of Section 5.9 of the Agreement; and (5) no Liens have been levied or claims made against Borrower or any of its Subsidiaries relating to unpaid employee payroll or benefits of which Borrower
has not previously provided written notification to Bank. 
 Attached are the required documents supporting the certification. The undersigned certifies
that these are prepared in accordance with GAAP consistently applied from one period to the next except as explained in an accompanying letter or footnotes. The undersigned acknowledges that no borrowings may be requested at any time or date of
determination that Borrower is not in compliance with any of the terms of the Agreement, and that compliance is determined not just at the date this certificate is delivered. Capitalized terms used but not otherwise defined herein shall have the
meanings given them in the Agreement. 
 Please indicate compliance status by circling Yes/No under “Complies” column. 

 

					
	 Reporting Covenant
	  	 Required
	  	 Complies

			
	Monthly financial statements with Compliance Certificate	  	Monthly within 30 days	  	Yes    No    
	Annual financial statement (CPA Audited)	  	FYE within 180 days	  	Yes    No    
	10-Q, 10-K and 8-K	  	Within 5 days after filing with SEC	  	Yes    No    
	Borrowing Base Certificate A/R & A/P Agings	  	Monthly within 30 days	  	Yes    No    
	Board-approved Projections	  	First Business Day of month following Board approval; at least annually	  	Yes    No    

											
	 Financial Covenant
	  	Required	 	  	Actual	 	  	Complies
				
	 Maintain at all times (tested monthly)
	  				  				  	
	 Tangible Net Worth
	  	$	7,500,000.00	  	  	$	            	  	  	Yes    No    

 The following are the exceptions with respect to the certification above. (If no exceptions exist, state
“No exceptions to note.”) 

  
  

 
  
  

 

 

			
	Acacia Communications, Inc.
		
	By:	 	  

	Name:	 	  

	Date:	 	  

 

					
	BANK USE ONLY
		
	Received by:	 	  

		 	AUTHORIZED SIGNER
		
	Date	 	  

		
	Verified:	 	  

		 	AUTHORIZED SIGNER
		
	Date:	 	  

		
	Compliance Status:	 	Yes            No    

 
 

 Schedule 1 to Compliance Certificate 

Financial Covenants of Borrower 

In the event of a conflict between this Schedule and the Loan Agreement, the terms of the Loan Agreement shall govern. 

Dated:                      

 

	I.	Tangible Net Worth (Section 6.11) 

 Required: $7,500,000.00 

 

							
	 A.
	  	 Stockholder equity of Borrower
	  	$	            	  
	 B.
	  	 Aggregate value of intangible assets
	  	$	            	  
	 C.
	  	 Subordinated Debt
	  	$	            	  
	 H.
	  	 Tangible Net Worth (line A minus line B minus, plus Line C)
	  	$	            	  

 Is line H equal to or greater than $7,500,000.00? 
  

			
	         No, not in compliance	 	         Yes, in compliance

 FIFTH LOAN MODIFICATION AGREEMENT 

This Fifth Loan Modification Agreement (this “Loan Modification Agreement”) is entered into as of September 12, 2013, but is
effective as of August 6, 2013, by and between SILICON VALLEY BANK, a California corporation, with its principal place of business at 3003 Tasman Drive, Santa Clara, California 95054 and with a loan production office located at 275 Grove
Street, Suite 2-200, Newton, Massachusetts 02466 (“Bank”) and ACACIA COMMUNICATIONS, INC., a Delaware corporation (“Borrower”). 

1. DESCRIPTION OF EXISTING INDEBTEDNESS AND OBLIGATIONS. Among other indebtedness and obligations which may be owing by Borrower to Bank, Borrower is
indebted to Bank pursuant to a loan arrangement dated as of June 9, 2011, evidenced by, among other documents, a certain Loan and Security Agreement dated as of June 9, 2011, between Borrower and Bank, as amended by that certain First Loan
Modification Agreement dated as of March 13, 2012, between Borrower and Bank, as amended by that certain Second Loan Modification Agreement dated as of June 8, 2012, between Borrower and Bank, as further amended by that certain Third Loan
Modification Agreement dated as of July 10, 2012, between Borrower and Bank, and as further amended by that certain Fourth Loan Modification Agreement dated as of September 20, 2012, between Borrower and Bank (as amended, the “Loan
Agreement”). Capitalized terms used but not otherwise defined herein shall have the same meaning as in the Loan Agreement. 
 2. DESCRIPTION OF
COLLATERAL. Repayment of the Obligations is secured by the Collateral as described in the Loan Agreement (together with any other collateral security granted to Bank, the “Security Documents”). Hereinafter, the Security Documents,
together with all other documents evidencing or securing the Obligations shall be referred to as the “Existing Loan Documents”. 
 3.
DESCRIPTION OF CHANGE IN TERMS. 
  

	 	A.	Modifications to Loan Agreement. 

  

	 	1	The Loan Agreement shall be amended by deleting Section 2.2 (Overadvances) thereof and inserting in lieu thereof the following: 

“2.2 Intentionally Omitted.” 
  

	 	2	The Loan Agreement shall be amended by deleting the following appearing as Section 2.3(a)(i) (Interest Rate; Advances) thereof: 

“(i) Advances. Subject to Section 2.3(b), the principal amount outstanding under the Revolving Line shall accrue interest at
a floating per annum rate equal to (a) prior to the 2012 Effective Date, one and one half of one percentage point (1.50%) above the Prime Rate, and (b) on and after the 2012 Effective Date, two percentage points (2.0%) above the
Prime Rate, which interest, in each case, shall be payable monthly in accordance with Section 2.3(f) below.” 

 and inserting in lieu thereof the following: 

“(i) Advances. Subject to Section 2.3(b), the principal amount outstanding under the Revolving Line shall accrue interest at
a floating per annum rate equal to (a) prior to the 2012 Effective Date, one and one half of one percentage point (1.50%) above the Prime Rate, (b) on and after the 2012 Effective Date through and including the Payment Date
immediately prior to the 2013 Effective Date, two percentage points (2.0%) above the Prime Rate, and (c) on the first Payment Date following the 2013 Effective Date and at all times thereafter, one half of one percentage point (0.5%) above
the Prime Rate, which interest, in each case, shall be payable monthly in accordance with Section 2.3(f) below.” 
  

	 	3	The Loan Agreement shall be amended by deleting Section 5.3 (Accounts Receivable) thereof and inserting in lieu thereof the following: 

“5.3 Intentionally Omitted.” 
  

	 	4	The Loan Agreement shall be amended by deleting Section 6.2(a) (Borrowing Base Reports) and Section 6.2(b) (Borrowing Base Certificate) thereof and inserting in lieu thereof the following: 

“(a) Intentionally Omitted.” 

“(b) Intentionally Omitted.” 
  

	 	5	The Loan Agreement shall be amended by deleting the following appearing as Section 6.6(a) (Operating Accounts) thereof: 

“(a) Maintain all of its and all of its Subsidiaries’ operating, depository, and securities accounts with Bank and Bank’s
Affiliates.” 
 and inserting in lieu thereof the following: 

“(a) Maintain its primary and its Subsidiaries’ primary operating, depository, and securities accounts with Bank and Bank’s
Affiliates, which accounts shall be in the name of Borrower and shall represent at least seventy-five percent (75.0%) of the dollar value of Borrower’s and such Subsidiaries accounts at all financial institutions.” 

  
 - 2 - 

	 	6	The Loan Agreement shall be amended by deleting the following appearing as Section 6.11 (Financial Covenant) thereof: 

“6.11 Financial Covenant. Maintain at all times, once a Growth Capital Advance is requested, to be tested as of the last day of
each month, calculated on a consolidated basis with respect to Borrower and its Subsidiaries, a Tangible Net Worth of at least Seven Million Five Hundred Thousand Dollars ($7,500,000.00).” 

and inserting in lieu thereof the following: 

“6.11 Financial Covenants. Maintain at all times, subject to periodic reporting as of the last day of each month, unless otherwise
noted, on a consolidated basis with respect to Borrower and its Subsidiaries: 
 (a) Minimum EBITDA. Commencing with
the month ending July 31, 2013, and as of the last day of each month thereafter, through and including the month ending February 28, 2014, minimum EBITDA, measured monthly on a trailing three (3) month basis, of at least One Million
Dollars ($1,000,000.00); and 
 (b) Minimum Net Income. Commencing with the month ending March 31, 2014, and as
of the last day of each month thereafter, minimum Net Income, measured monthly on a trailing three (3) month basis, of at least Two Million Dollars ($2,000,000.00).” 
  

	 	7	The Loan Agreement shall be amended by deleting the following definitions appearing in 13.1 thereof: 

““Availability Amount” is (a) the lesser of (i) the Revolving Line or (ii) the amount available under the
Borrowing Base minus (b) the outstanding principal balance of any Advances.” 
 ““Revolving Line Maturity
Date” is August 6, 2013.” 
 and inserting in lieu thereof the following: 

““Availability Amount” is the Revolving Line minus the outstanding principal balance of any Advances.” 

““Revolving Line Maturity Date” is August 5, 2015.” 

 

	 	8	The Loan Agreement shall be amended by inserting the following new terms and their respective definitions to appear alphabetically in Section 13.1 thereof: 

““2013 Effective Date” is August 6, 2013.” 

  
 - 3 - 

 ““EBITDA” shall mean (a) Net Income, plus (b) Interest Expense,
plus (c) to the extent deducted in the calculation of Net Income, depreciation expense and amortization expense, plus (d) income tax expense.” 

““Interest Expense” means for any fiscal period, interest expense (whether cash or non-cash) determined in accordance
with GAAP for the relevant period ending on such date, including, in any event, interest expense with respect to any Credit Extension and other Indebtedness of Borrower and its Subsidiaries, including, without limitation or duplication, all
commissions, discounts, or related amortization and other fees and charges with respect to letters of credit and bankers’ acceptance financing and the net costs associated with interest rate swap, cap, and similar arrangements, and the interest
portion of any deferred payment obligation (including leases of all types).” 
 ““Net Income” means, as
calculated on a consolidated basis for Borrower and its Subsidiaries for any period as at any date of determination, the net profit (or loss), after provision for taxes, of Borrower and its Subsidiaries for such period taken as a single accounting
period.” 
  

	 	9	The Compliance Certificate appearing as Exhibit D to the Loan Agreement is hereby replaced with the Compliance Certificate attached as Exhibit 1 hereto. 

4. FEES. Borrower shall pay to Bank a fully-earned non-refundable commitment fee equal to Forty Thousand Dollars ($40,000.00), which fee shall be due
on the date hereof and payable as follows: (a) Twenty Thousand Dollars ($20,000.00) is payable on the 2013 Effective Date, and (b) Twenty Thousand Dollars ($20,000.00) is payable on the earliest to occur of (i) the first anniversary
of the 2013 Effective Date, (ii) an Event of Default, or (iii) the early termination of the Revolving Line. Borrower shall also reimburse Bank for all legal fees and expenses incurred in connection with this amendment to the Existing Loan
Documents. 
 5. UPDATED PERFECTION CERTIFICATE. Borrower has delivered an updated Perfection Certificate in connection with this Loan Modification
Agreement dated as of September 12, 2013 (the “Updated Perfection Certificate”), which Updated Perfection Certificate shall supersede in all respects that certain Perfection Certificate dated as of June 9, 2011. Borrower
agrees that all references in the Loan Agreement to “Perfection Certificate” shall hereinafter be deemed to be a reference to the Updated Perfection Certificate. 

6. CONSISTENT CHANGES. The Existing Loan Documents are hereby amended wherever necessary to reflect the changes described above. 

  
 - 4 - 

 7. RATIFICATION OF LOAN DOCUMENTS. Borrower hereby ratifies, confirms, and reaffirms all terms and
conditions of all security or other collateral granted to the Bank, and confirms that the indebtedness secured thereby includes, without limitation, the Obligations. 

8. NO DEFENSES OF BORROWER. Borrower hereby acknowledges and agrees that Borrower has no offsets, defenses, claims, or counterclaims against Bank with
respect to the Obligations, or otherwise, and that if Borrower now has, or ever did have, any offsets, defenses, claims, or counterclaims against Bank, whether known or unknown, at law or in equity, all of them are hereby expressly WAIVED and
Borrower hereby RELEASES Bank from any liability thereunder. 
 9. CONTINUING VALIDITY. Borrower understands and agrees that in modifying the
existing Obligations, Bank is relying upon Borrower’s representations, warranties, and agreements, as set forth in the Existing Loan Documents. Except as expressly modified pursuant to this Loan Modification Agreement, the terms of the Existing
Loan Documents remain unchanged and in full force and effect. Bank’s agreement to modifications to the existing Obligations pursuant to this Loan Modification Agreement in no way shall obligate Bank to make any future modifications to the
Obligations. Nothing in this Loan Modification Agreement shall constitute a satisfaction of the Obligations. It is the intention of Bank and Borrower to retain as liable parties all makers of Existing Loan Documents, unless the party is expressly
released by Bank in writing. No maker will be released by virtue of this Loan Modification Agreement. 
 10. COUNTERSIGNATURE. This Loan Modification
Agreement shall become effective only when it shall have been executed by Borrower and Bank. 
 [The remainder of this page is
intentionally left blank.] 

  
 - 5 - 

 This Loan Modification Agreement is executed as a sealed instrument under the laws of the
Commonwealth of Massachusetts as of the date first written above. 
  

									
	BORROWER:	 		 	BANK:
			
	ACACIA COMMUNICATIONS, INC.	 		 	SILICON VALLEY BANK
					
	By:	 	 /s/ Raj Shanmugaraj
	 		 	By:	 	 /s/ Brendan P. Quinn

					
	Name:	 	 Raj Shanmugaraj
	 		 	Name:	 	 Brendan P. Quinn

					
	Title:	 	 President and CEO
	 		 	Title:	 	 Vice President

  
 - 6 - 

 Exhibit 1 

EXHIBIT D - COMPLIANCE CERTIFICATE 
  

					
	TO:	  	SILICON VALLEY BANK	  	Date:                     
	FROM:	  	ACACIA COMMUNICATIONS, INC.	  	

 The undersigned authorized officer of Acacia Communications, Inc. (“Borrower”) certifies that under
the terms and conditions of the Loan and Security Agreement between Borrower and Bank (the “Agreement”): 
 (1) Borrower is in
complete compliance for the period ending                      with all required covenants except as noted below; (2) there are no Events of
Default; (3) all representations and warranties in the Agreement are true and correct in all material respects on this date except as noted below; provided, however, that such materiality qualifier shall not be applicable to any representations
and warranties that already are qualified or modified by materiality in the text thereof; and provided, further that those representations and warranties expressly referring to a specific date shall be true, accurate and complete in all material
respects as of such date; (4) Borrower, and each of its Subsidiaries, has timely filed all required tax returns and reports, and Borrower has timely paid all foreign, federal, state and local taxes, assessments, deposits and contributions owed
by Borrower except as otherwise permitted pursuant to the terms of Section 5.9 of the Agreement; and (5) no Liens have been levied or claims made against Borrower or any of its Subsidiaries relating to unpaid employee payroll or benefits
of which Borrower has not previously provided written notification to Bank. 
 Attached are the required documents supporting the
certification. The undersigned certifies that these are prepared in accordance with GAAP consistently applied from one period to the next except as explained in an accompanying letter or footnotes. The undersigned acknowledges that no borrowings may
be requested at any time or date of determination that Borrower is not in compliance with any of the terms of the Agreement, and that compliance is determined not just at the date this certificate is delivered. Capitalized terms used but not
otherwise defined herein shall have the meanings given them in the Agreement. 
 Please indicate compliance status by circling Yes/No under
“Complies” column. 
  

					
	 Reporting Covenant
	  	 Required
	  	 Complies

			
	Monthly financial statements with Compliance Certificate	  	Monthly within 30 days	  	Yes    No    
	Annual financial statement (CPA Audited)	  	FYE within 180 days	  	Yes    No    
	10-Q, 10-K and 8-K	  	Within 5 days after filing with SEC	  	Yes    No    
	Board-approved Projections	  	First Business Day of month following Board approval, but at least annually	  	Yes    No    

  

					
	August 2013	 	- 7 -	 	

													
	 Financial Covenant
	  	Required	 	 	Actual	 	  	Complies	 
				
	 Maintain at all times (tested monthly on a consolidated basis):
	  				 				  			
	 Minimum EBITDA
	  	 	  	* 	 	$	            	  	  	 	Yes    No    	  
	 Minimum Net Income
	  	 	  	** 	 	$	            	  	  	 	Yes    No    	  

  

	*	As set forth in Section 6.11(a) of the Agreement. 

	**	As set forth in Section 6.11(b) of the Agreement. 

 The following financial covenant
analysis and information set forth in Schedule 1 attached hereto are true and accurate as of the date of this Certificate. 
 Other
Matters 
  

			
	Have there been any amendments of or other changes to the capitalization table of Borrower and to the Operating Documents of Borrower or any of its Subsidiaries? If yes, provide copies of any such amendments or changes with this
Compliance Certificate.	  	Yes    No    

 The following are the exceptions with respect to the certification above: (If no exceptions exist, state
“No exceptions to note.”) 
  
  

 
  
  

 
  

									
	ACACIA COMMUNICATIONS, INC.	 		 	BANK USE ONLY
					
	By:	 	  
	 		 	Received by:	 	  

	 Name:
	 	  
	 		 		 	AUTHORIZED SIGNER
	 Title: 
	 	  
	 		 		 	
		 		 		 	Date:	 	  

					
		 		 		 	Verified:	 	  

		 		 		 		 	AUTHORIZED SIGNER
					
		 		 		 	Date:	 	  

				
		 		 		 	Compliance Status:                        Yes        
No

  

					
	August 2013	 	- 8 -	 	

 Schedule 1 to Compliance Certificate 

Financial Covenants of Borrower 

In the event of a conflict between this Schedule and the Loan Agreement, the terms of the Loan Agreement shall govern. 

Dated:                      

 

	I.	Minimum EBITDA (Section 6.11(a)) 

  

			
	Required:	  	Commencing with the month ending July 31, 2013, and as of the last day of each month thereafter, through and including the month ending February 28, 2014, minimum EBITDA, measured monthly on a trailing three (3) month
basis, of at least One Million Dollars ($1,000,000.00)
		
	Actual:	  	

  

									
	 A.
	  	 Net Income (as defined in the Loan Agreement)
	  	$	            	  
	 B.
	  	 Interest Expense (as defined in the Loan Agreement)
	  	$	            	  
	 C.
	  	 To the extent deducted in the calculation of Net Income:
	  	$	            	  
		  	 1.    Depreciation expense
	  	$	            	  
		  	 2.    Amortization expense
	  	$	            	  
	 D.
	  	 Income tax expense
	  	$	            	  
	 E.
	  	 EBITDA (sum of lines A, B, C.l, C.2, and D)
	  	$	            	  

  

			
	         No, not in compliance	  	         Yes, in compliance

  

	II.	Minimum Net Income (Section 6.11 (b)) 

  

			
	Required:	  	Commencing with the month ending March 31, 2014, and as of the last day of each month thereafter, minimum Net Income, measured monthly on a trailing three (3) month basis, of at least Two Million Dollars
($2,000,000.00)
		
	Actual:	  	$             

  

			
	         No, not in compliance	  	         Yes, in compliance

  

					
	August 2013	 	- 9 -	 	

 SIXTH LOAN MODIFICATION AGREEMENT 

This Sixth Loan Modification Agreement (this “Loan Modification Agreement”) is entered into as of September 18,
2014, by and between SILICON VALLEY BANK, a California corporation, with its principal place of business at 3003 Tasman Drive, Santa Clara, California 95054 and with a loan production office located at 275 Grove Street, Suite 2-200, Newton,
Massachusetts 02466 (“Bank”) and ACACIA COMMUNICATIONS, INC., a Delaware corporation with its chief executive office located at 3 Clock Tower Place, Suite 130, Maynard, Massachusetts 01754 (“Borrower”).

 1. DESCRIPTION OF EXISTING INDEBTEDNESS AND OBLIGATIONS. Among other indebtedness and obligations which may be owing by Borrower to Bank,
Borrower is indebted to Bank pursuant to a loan arrangement dated as of June 9, 2011, evidenced by, among other documents, a certain Loan and Security Agreement dated as of June 9, 2011, between Borrower and Bank, as amended by that
certain First Loan Modification Agreement dated as of March 13, 2012, between Borrower and Bank, as amended by that certain Second Loan Modification Agreement dated as of June 8, 2012, between Borrower and Bank, as further amended by that
certain Third Loan Modification Agreement dated as of July 10, 2012, between Borrower and Bank, as further amended by that certain Fourth Loan Modification Agreement dated as of September 20, 2012, between Borrower and Bank, and as further
amended by that certain Fifth Loan Modification Agreement dated as of September 12, 2013, but effective as of August 6, 2013, between Borrower and Bank (as amended, the “Loan Agreement”). Capitalized terms used but not
otherwise defined herein shall have the same meaning as in the Loan Agreement. 
 2. DESCRIPTION OF COLLATERAL. Repayment of the Obligations is
secured by the Collateral as described in the Loan Agreement (together with any other collateral security granted to Bank, the “Security Documents”). Hereinafter, the Security Documents, together with all other documents evidencing
or securing the Obligations shall be referred to as the “Existing Loan Documents”. 
 3. DESCRIPTION OF CHANGE IN TERMS. 

 

	 	A.	Modifications to Loan Agreement. 

  

	 	1	Notwithstanding Section 6.2(e) of the Loan Agreement, Borrower shall be required to deliver to Bank audited consolidated Financial statements prepared under GAAP, consistently applied, together with an unqualified
opinion on the financial statements from an independent certified public accounting firm acceptable to Bank in its reasonable discretion for Borrower’s fiscal year ending December 31, 2013, on or before July 31 2014.

	 	2	The Loan Agreement shall be amended by deleting the following appearing as Section 6.11 (Financial Covenant) thereof: 

“6.11 Financial Covenants. Maintain at all times, subject to periodic reporting as of the last day of each month, unless otherwise
noted, on a consolidated basis with respect to Borrower and its Subsidiaries: 
 (a) Minimum EBITDA. Commencing with
the month ending July 31, 2013, and as of the last day of each month thereafter, through and including the month ending February 28, 2014, minimum EBITDA, measured monthly on a trailing three (3) month basis, of at least One Million
Dollars ($1,000,000.00); and 
 (b) Minimum Net Income. Commencing with the month ending March 31, 2014, and as
of the last day of each month thereafter, minimum Net Income, measured monthly on a trailing three (3) month basis, of at least Two Million Dollars ($2,000,000.00).” 

and inserting in lieu thereof the following: 

“6.11 Financial Covenants. Maintain at all times, subject to periodic reporting as of the last day of each month, unless
otherwise noted, on a consolidated basis with respect to Borrower and its Subsidiaries: 
 (a) Minimum EBITDA.
Minimum EBITDA, measured monthly on a trailing three (3) month basis as of the last day of each month of at least the following: 
  

					
	 Month ending
	  	Minimum
EBITDA	 
	 July 31, 2013 through February 28, 2014
	  	$	1,000,000.00	  
	 April 30, 2014 through June 30, 2014
	  	$	1,000,000.00	  
	 July 31, 2014
	  	($	500,000.00	) 
	 August 31, 2014
	  	$	500,000.00	  
	 September 30, 2014 and as of the last day of each month thereafter
	  	$	1,000,000.00	  

 (b) Minimum Net Income. For the month ending March 31, 2014, minimum Net Income,
measured monthly on a trailing three (3) month basis, of at least Two Million Dollars ($2,000,000.00); and 
 (c)
Adjusted Quick Ratio. Commencing with the month ending June 30, 2014, and as of the last day of each month thereafter, an Adjusted Quick Ratio of at least 1.25 to 1.00.” 

  
 - 2 - 

	 	3	The Loan Agreement shall be amended by deleting the following definition appearing in 13.1 thereof: 

““Revolving Line” is an Advance or Advances in an amount equal to Eight Million Dollars ($8,000,000.00).” 

and inserting in lieu thereof the following: 

““Revolving Line” is an Advance or Advances in an amount equal to Fifteen Million Dollars ($15,000,000.00).” 

 

	 	4	The Loan Agreement shall be amended by inserting the following new term and its definition to appear alphabetically in Section 13.1 thereof: 

““Total Liabilities” is on any day, obligations that should, under GAAP, be classified as liabilities on Borrower’s
consolidated balance sheet, including all Indebtedness.” 
  

	 	5	The Compliance Certificate appearing as Exhibit D to the Loan Agreement is hereby replaced with the Compliance Certificate attached as Exhibit 1 hereto. 

 

	 	B.	Waivers. 

  

	 	1	Bank hereby waives Borrower’s existing defaults under the Loan Agreement by virtue of Borrower’s failure to comply with (a) Section 6.2(c) (Monthly Financial Statements) and Section 6.2(d)
(Monthly Compliance Certificate) thereof for the months ending October 31, 2013, November 30, 2013, December 31, 2013, January 31, 2014 and February 28, 2014, (b) the Minimum EBITDA financial covenant set
forth in Section 6.11(a) thereof as of the month ending December 31, 2013, and (c) the Minimum Net Income financial covenant set forth in Section 6.11(b) thereof as of the month ending March 31, 2014 (the “Existing
Defaults”). Bank’s waiver of the Existing Defaults shall apply only to the foregoing specific periods. Borrower hereby acknowledges and agrees that except as specifically provided herein, nothing in this Section or anywhere in this
Loan Modification Agreement shall be deemed or otherwise construed as a waiver by Bank of any of its rights and remedies pursuant to the Loan Documents, applicable law or otherwise. 

4. FEES. Borrower shall pay to Bank a fully-earned non-refundable amendment fee equal to Ten Thousand Dollars ($10,000.00) on the date hereof,
which, for the avoidance of doubt, is due and payable to Bank in addition to the fee of Twenty Thousand Dollars ($20,000.00) which  

  
 - 3 - 

 
is due and payable on the earliest to occur of (a) August 6, 2014, (b) an Event of Default, or (c) the early termination of the Revolving Line. Borrower shall also reimburse
Bank for all legal fees and expenses incurred in connection with this amendment to the Existing Loan Documents. 
 5. RATIFICATION OF PERFECTION
CERTIFICATE. Borrower hereby ratifies, confirms and reaffirms, all and singular, the terms and disclosures contained in that certain Perfection Certificate dated as of September 12, 2013 delivered by Borrower to Bank (the
“Perfection Certificate”), and acknowledges, confirms and agrees the disclosures and information above Borrower provided to Bank in the Perfection Certificate have not changed, as of the date hereof. 

6. CONSISTENT CHANGES. The Existing Loan Documents are hereby amended wherever necessary to reflect the changes described above. 

7. RATIFICATION OF LOAN DOCUMENTS. Borrower hereby ratifies, confirms, and reaffirms all terms and conditions of all security or other collateral
granted to the Bank, and confirms that the indebtedness secured thereby includes, without limitation, the Obligations. 
 8. NO DEFENSES OF BORROWER.
Borrower hereby acknowledges and agrees that Borrower has no offsets, defenses, claims, or counterclaims against Bank with respect to the Obligations, or otherwise, and that if Borrower now has, or ever did have, any offsets, defenses, claims, or
counterclaims against Bank, whether known or unknown, at law or in equity, all of them are hereby expressly WAIVED and Borrower hereby RELEASES Bank from any liability thereunder. 

9. CONTINUING VALIDITY. Borrower understands and agrees that in modifying the existing Obligations, Bank is relying upon Borrower’s
representations, warranties, and agreements, as set forth in the Existing Loan Documents. Except as expressly modified pursuant to this Loan Modification Agreement, the terms of the Existing Loan Documents remain unchanged and in full force and
effect. Bank’s agreement to modifications to the existing Obligations pursuant to this Loan Modification Agreement in no way shall obligate Bank to make any future modifications to the Obligations. Nothing in this Loan Modification Agreement
shall constitute a satisfaction of the Obligations. It is the intention of Bank and Borrower to retain as liable parties all makers of Existing Loan Documents, unless the party is expressly released by Bank in writing. No maker will be released by
virtue of this Loan Modification Agreement. 
 10. COUNTERSIGNATURE. This Loan Modification Agreement shall become effective only when it shall have
been executed by Borrower and Bank. 
 [The remainder of this page is intentionally left blank.] 

  
 - 4 - 

 This Loan Modification Agreement is executed as a sealed instrument under the laws of the
Commonwealth of Massachusetts as of the date first written above. 
  

									
	BORROWER:	 		 	BANK:
			
	ACACIA COMMUNICATIONS, INC.	 		 	SILICON VALLEY BANK
					
	By:	 	 /s/ John Gavin
	 		 	By:	 	 /s/ Nick Currie

					
	Name:	 	 John Gavin
	 		 	Name:	 	 Nick Currie

					
	Title:	 	 CFO
	 		 	Title:	 	 Vice President

  
 - 5 - 

 Exhibit 1 

EXHIBIT D - COMPLIANCE CERTIFICATE 
  

					
	TO:	  	SILICON VALLEY BANK	  	Date:                     
	FROM:	  	ACACIA COMMUNICATIONS, INC.	  	

 The undersigned authorized officer of Acacia Communications, Inc. (“Borrower”) certifies that under
the terms and conditions of the Loan and Security Agreement between Borrower and Bank (the “Agreement”): 
 (1) Borrower is in
complete compliance for the period ending                      with all required covenants except as noted below; (2) there are no Events of
Default; (3) all representations and warranties in the Agreement are true and correct in all material respects on this date except as noted below; provided, however, that such materiality qualifier shall not be applicable to any representations
and warranties that already are qualified or modified by materiality in the text thereof; and provided, further that those representations and warranties expressly referring to a specific date shall be true, accurate and complete in all material
respects as of such date; (4) Borrower, and each of its Subsidiaries, has timely filed all required tax returns and reports, and Borrower has timely paid all foreign, federal, state and local taxes, assessments, deposits and contributions owed
by Borrower except as otherwise permitted pursuant to the terms of Section 5.9 of the Agreement; and (5) no Liens have been levied or claims made against Borrower or any of its Subsidiaries relating to unpaid employee payroll or benefits
of which Borrower has not previously provided written notification to Bank. 
 Attached are the required documents supporting the
certification. The undersigned certifies that these are prepared in accordance with GAAP consistently applied from one period to the next except as explained in an accompanying letter or footnotes. The undersigned acknowledges that no borrowings may
be requested at any time or date of determination that Borrower is not in compliance with any of the terms of the Agreement, and that compliance is determined not just at the date this certificate is delivered. Capitalized terms used but not
otherwise defined herein shall have the meanings given them in the Agreement. 
 Please indicate compliance status by circling Yes/No under
“Complies” column. 
  

					
	 Reporting Covenant
	  	 Required
	  	 Complies

			
	Monthly financial statements with Compliance Certificate	  	Monthly within 30 days	  	Yes    No    
	Annual financial statement (CPA Audited)	  	FYE within 180 days	  	Yes    No    
	10-Q, 10-K and 8-K	  	Within 5 days after filing with SEC	  	Yes    No    
	Board-approved Projections	  	First Business Day of month following Board approval, but at least annually	  	Yes    No    

  

					
	September 2014	 	- 6 -	 	

											
	 Financial Covenant
	  	Required	 	  	Actual	 	  	Complies
				
	 Maintain at all times (tested monthly on a consolidated basis):
	  				  				  	
	 Minimum EBITDA
	  	 	    	* 	  	$	            	  	  	Yes    No    
	 Minimum AQR
	  	 	1.25:1.0	  	  	$	    :1.0	  	  	Yes    No    

  

	*	As set forth in Section 6.11(a) of the Agreement. 

 The following financial covenant
analysis and information set forth in Schedule 1 attached hereto are true and accurate as of the date of this Certificate. 
 Other
Matters 
  

			
	Have there been any amendments of or other changes to the capitalization table of Borrower and to the Operating Documents of Borrower or any of its Subsidiaries? If yes, provide copies of any such amendments or changes with this
Compliance Certificate.	  	Yes    No    

 The following are the exceptions with respect to the certification above: (If no exceptions exist, state
“No exceptions to note.”) 

	
	  

	  

	  

  

									
	ACACIA COMMUNICATIONS, INC.	 		 	BANK USE ONLY
					
	By:	 	  
	 		 	Received by:	 	  

	 Name:
	 	  
	 		 		 	AUTHORIZED SIGNER
	 Title:
	 	  
	 		 		 	
		 		 		 	Date:	 	  

					
		 		 		 	Verified:	 	  

		 		 		 		 	AUTHORIZED SIGNER
					
		 		 		 	Date:	 	  

				
		 		 		 	Compliance Status:                        Yes        
No

  
 - 7 - 

 Schedule 1 to Compliance Certificate 

Financial Covenants of Borrower 

In the event of a conflict between this Schedule and the Loan Agreement, the terms of the Loan Agreement shall govern. 

Dated:                      

 

	I.	Minimum EBITDA (Section 6.11(a)) 

  

	Required:	Minimum EBITDA, measured monthly on a trailing three (3) month basis as of the last day of each month of at least the following: 

 

					
	 Month ending
	  	Minimum EBITDA	 
	 July 31, 2013 through February 28, 2014
	  	$	1,000,000.00	  
	 April 30, 2014 through June 30, 2014
	  	$	1,000,000.00	  
	 July 31, 2014
	  	($	500,000.00	) 
	 August 31, 2014
	  	$	500,000.00	  
	 September 30, 2014 and as of the last day of each month thereafter
	  	$	1,000,000.00	  

 Actual: 
  

							
	 A.
	  	 Net Income (as defined in the Loan Agreement)
	  	$	            	  
	 B.
	  	 Interest Expense (as defined in the Loan Agreement)
	  	$	            	  
	 C.
	  	 To the extent deducted in the calculation of Net Income:
	  	$	 	  
		  	 1.    Depreciation expense
	  	$	 	  
		  	 2.    Amortization expense
	  	$	 	  
	 D.
	  	 Income tax expense
	  	$	 	  
	 E.
	  	 EBITDA (sum of lines A, B, C.l, C.2, and D)
	  	$	 	  

 Is line E equal to or greater than the required level for the specific period? 

 

			
	         No, not in compliance	  	         Yes, in compliance

  
 - 8 - 

	II.	Adjusted Quick Ratio (Section 6.11(c)) 

  

	Required:	Commencing with the month ending June 30, 2014, and as of the last day of each month thereafter, an Adjusted Quick ratio of at least 1.25 to 1.00. 

Actual: 
  

							
	 A.
	  	 Aggregate value of Borrower’s consolidate, unrestricted cash maintained with Bank
	  	$	            	  
	 B.
	  	 Aggregate value of Borrower’s consolidated net billed accounts receivable, determined according to GAAP
	  	$	 	  
	 C.
	  	 Quick Assets (the sum of lines A and B)
	  	$	 	  
	 D.
	  	 Aggregate value of all obligations and liabilities of Borrower to Bank
	  	$	 	  
	 E.
	  	 Aggregate value of obligations that should, under GAAP, be classified as liabilities on Borrower’s consolidated balance sheet,
including all Indebtedness, not otherwise reflected in line D above, that mature within one (1) year
	  	$	 	  
	 F.
	  	 Current Liabilities (the sum of lines D and E)
	  	$	 	  
	 G.
	  	 Aggregate value of current portion of all amounts received or invoiced by Borrower in advance of performance under contracts and not
yet recognized as revenue
	  	$	 	  
	 H.
	  	 Line F minus G
	  	$	 	  
	 I.
	  	 Adjusted Quick Ratio (line C divided by line H)
	  			

 Is line I equal to or greater than 1.25:1.00? 
  

			
	         No, not in compliance	  	         Yes, in compliance

  
 - 9 - 

 SEVENTH LOAN MODIFICATION AGREEMENT 

This Seventh Loan Modification Agreement (this “Loan Modification Agreement”) is entered into as of August 5,
2015, by and between SILICON VALLEY BANK, a California corporation, with its principal place of business at 3003 Tasman Drive, Santa Clara, California 95054 and with a loan production office located at 275 Grove Street, Suite 2-200, Newton,
Massachusetts 02466 (“Bank”) and ACACIA COMMUNICATIONS, INC., a Delaware corporation with its chief executive office located at 3 Clock Tower Place, Suite 130, Maynard, Massachusetts 01754 (“Borrower”).

 1. DESCRIPTION OF EXISTING INDEBTEDNESS AND OBLIGATIONS. Among other indebtedness and obligations which may be owing by Borrower to Bank,
Borrower is indebted to Bank pursuant to a loan arrangement dated as of June 9, 2011, evidenced by, among other documents, a certain Loan and Security Agreement dated as of June 9, 2011, between Borrower and Bank, as amended by that
certain First Loan Modification Agreement dated as of March 13, 2012, between Borrower and Bank, as amended by that certain Second Loan Modification Agreement dated as of June 8, 2012, between Borrower and Bank, as further amended by that
certain Third Loan Modification Agreement dated as of July 10, 2012, between Borrower and Bank, as further amended by that certain Fourth Loan Modification Agreement dated as of September 20, 2012, between Borrower and Bank, and as further
amended by that certain Fifth Loan Modification Agreement dated as of September 12, 2013, but effective as of August 6, 2013, as further amended by that certain Sixth Loan Modification Agreement dated as of September 18, 2014, between
Borrower and Bank (as amended, the “Loan Agreement”). Capitalized terms used but not otherwise defined herein shall have the same meaning as in the Loan Agreement. 

2. DESCRIPTION OF COLLATERAL. Repayment of the Obligations is secured by the Collateral as described in the Loan Agreement (together with any other
collateral security granted to Bank, the “Security Documents”). Hereinafter, the Security Documents, together with all other documents evidencing or securing the Obligations shall be referred to as the “Existing Loan
Documents”. 
 3. DESCRIPTION OF CHANGE IN TERMS. 
  

	 	A.	Modifications to Loan Agreement. 

  

	 	1	The Loan Agreement shall be amended by deleting the following definition appearing in 13.1 thereof: 

““Revolving Line Maturity Date” is August 5, 2015” 

and inserting in lieu thereof the following: 

““Revolving Line Maturity Date” is November 5, 2015” 

4. FEES. Borrower shall pay to Bank a fully-earned non-refundable modification fee equal to Three Thousand Six Hundred Ninety Eight Dollars and Sixty
Three Cents ($3,698.63) which fee shall be due and payable as of the Seventh Loan Modification date. 

 5. RATIFICATION OF’ PERFECTION CERTIFICATE. Borrower hereby ratifies, confirms and reaffirms, all and
singular, the terms and disclosures contained in that certain Perfection Certificate dated as of September 12, 2013 delivered by Borrower to Batik (the “Perfection Certificate”), and acknowledges, confirms and agrees the
disclosures and information above Borrower provided to Bank in the Perfection Certificate have not changed, as of the date hereof. 
 6. CONSISTENT
CHANGES. The Existing Loan Documents are hereby amended wherever necessary to reflect the changes described above. 
 7. RATIFICATION OF LOAN
DOCUMENTS. Borrower hereby ratifies, confirms, and reaffirms all terms and conditions of all security or other collateral granted to the Bank, and confirms that the indebtedness secured thereby includes, without limitation, the Obligations. 

8. NO DEFENSES OF BORROWER. Borrower hereby acknowledges and agrees that Borrower has no offsets, defenses, claims, or counterclaims against Bank with
respect to the Obligations, or otherwise, and that if Borrower now has, or ever did have, any offsets, defenses, claims, or counterclaims against Bank, whether known or unknown, at law or in equity, all of them are hereby expressly WAIVED and
Borrower hereby RELEASES Bank from any liability thereunder. 
 9. CONTINUING VALIDITY. Borrower understands and agrees that in modifying the
existing Obligations, Bank is relying upon Borrower’s representations, warranties, and agreements, as set forth in the Existing Loan Documents. Except as expressly modified pursuant to this Loan Modification Agreement, the terms of the Existing
Loan Documents remain unchanged and in full force and effect. Bank’s agreement to modifications to the existing Obligations pursuant to this Loan Modification Agreement in no way shall obligate Bank to make any future modifications to the
Obligations. Nothing in this Loan Modification Agreement shall constitute a satisfaction of the Obligations. It is the intention of Bank and Borrower to retain as liable parties all makers of Existing Loan Documents, unless the party is expressly
released by Bank in writing. No maker will be released by virtue of this Loan Modification Agreement. 
 10. COUNTERSIGNATURE. This Loan Modification
Agreement shall become effective only when it shall have been executed by Borrower and Bank. 
 [The remainder of this page is
intentionally left blank.] 

  
 - 2 - 

 This Loan Modification Agreement is executed as a sealed instrument under the laws of
Commonwealth of Massachusetts as of the date first written above. 
  

									
	BORROWER:	 		 	BANK:
			
	ACACIA COMMUNICATIONS, INC.	 		 	SILICON VALLEY BANK
					
	By:	 	 /s/ John Gavin
	 		 	By:	 	 /s/ Nick Currie

					
	Name:	 	 John Gavin
	 		 	Name:	 	 Nick Currie

					
	Title:	 	 CFO
	 		 	Title:	 	 Vice President

  
 - 3 - 

 PRO FORMA INVOICE FOR LOAN CHARGES 

BORROWER: ACACIA COMMUNICATIONS, INC. 
  

					
	A.	 	LOAN OFFICER:	  	Nick Currie
			
	B.	 	DATE:	  	August 11, 2015
			
	C.	 	Modification Fee:	  	$3,698.63
		
	TOTAL FEES DUE	  	$3,698.63
		
	{    }	  	A check for the total amount is attached.
		
	{X}	  	Debit DDA # 3300676311 for the total amount.

  

			
	BORROWER:
		
	/s/ John Gavin	 	8/11/2015
	  

	Authorized Signer	 	(Date)
	
	SILICON VALLEY BANK:
		
	/s/ Nick Currie	 	
	  

	Loan Officer Signature	 	(Date)

  
 - 4 - 

 Exhibit K 

EIGHTH LOAN MODIFICATION AGREEMENT 

This Eighth Loan Modification Agreement (this “Loan Modification Agreement”) is entered into as of November 4, 2015, by
and between SILICON VALLEY BANK, a California corporation, with its principal place of business at 3003 Tasman Drive, Santa Clara, California 95054 and with a loan production office located at 275 Grove Street, Suite 2-200, Newton,
Massachusetts 02466 (“Bank”) and ACACIA COMMUNICATIONS, INC., a Delaware corporation with its chief executive office located at 3 Clock Tower Place, Suite 130, Maynard, Massachusetts 01754 (“Borrower”). 

1. DESCRIPTION OF EXISTING INDEBTEDNESS AND OBLIGATIONS. Among other indebtedness and obligations which may be owing by Borrower to Bank, Borrower is
indebted to Bank pursuant to a loan arrangement dated as of June 9, 2011, evidenced by, among other documents, that certain Loan and Security Agreement between Borrower and Bank dated as of June 9, 2011, as amended by that certain First
Loan Modification Agreement between Borrower and Bank dated as of March 13, 2012, as amended by that certain Second Loan Modification Agreement between Borrower and Bank dated as of June 8, 2012, as amended by that certain Third Loan
Modification Agreement between Borrower and Bank dated as of July 10, 2012, as amended by that certain Fourth Loan Modification Agreement between Borrower and Bank dated as of September 20, 2012, as amended by that certain Fifth Loan
Modification Agreement between Borrower and Bank dated as of September 12, 2013, as amended by that certain Sixth Loan Modification Agreement between Borrower and Bank dated as of September 18, 2014, and as further amended by that certain
Seventh Loan Modification Agreement between Borrower and Bank dated as of August 5, 2015 (as amended, the “Loan Agreement”). Capitalized terms used but not otherwise defined herein shall have the same meaning as in the Loan
Agreement. 
 2. DESCRIPTION OF COLLATERAL. Repayment of the Obligations is secured by the Collateral as described in the Loan Agreement (together
with any other collateral security granted to Bank, the “Security Documents”). Hereinafter, the Security Documents, together with all other documents evidencing or securing the Obligations shall be referred to as the
“Existing Loan Documents”. 
 3. DESCRIPTION OF CHANGE IN TERMS. 

 

	 	A.	Modifications to Loan Agreement. 

  

	 	1	The Loan Agreement shall be amended by deleting the following definition appearing in 13.1 thereof: 

“             “Revolving Line Maturity Date”
is November 5, 2015.” 
 and inserting in lieu thereof the following: 

“             “Revolving Line Maturity Date”
is January 4, 2016.” 
 4. FEES. Borrower shall pay to Bank a fully-earned non-refundable modification fee equal to Two Thousand Four
Hundred Sixty Five Dollars and Seventy Five Cents ($2,465.75) which fee shall be due and payable as of the date hereof. 
 5. RATIFICATION OF PERFECTION
CERTIFICATE. Borrower hereby ratifies, confirms and reaffirms, all and singular, the terms and disclosures contained in that certain Perfection Certificate dated as of September 12, 2013 delivered by Borrower to Bank (the
“Perfection Certificate”), and acknowledges, confirms and agrees the disclosures and information Borrower provided to Bank in the Perfection Certificate have not changed, as of the date hereof. 

6. CONSISTENT CHANGES. The Existing Loan Documents are hereby amended wherever necessary to reflect the changes described above. 

 7. RATIFICATION OF LOAN DOCUMENTS. Borrower hereby ratifies, confirms, and reaffirms all terms and
conditions of all security or other collateral granted to the Bank, and confirms that the indebtedness secured thereby includes, without limitation, the Obligations. 

8. NO DEFENSES OF BORROWER. Borrower hereby acknowledges and agrees that Borrower has no offsets, defenses, claims, or counterclaims against Bank with
respect to the Obligations, or otherwise, and that if Borrower now has, or ever did have, any offsets, defenses, claims, or counterclaims against Bank, whether known or unknown, at law or in equity, all of them are hereby expressly WAIVED and
Borrower hereby RELEASES Bank from any liability thereunder. 
 9. CONTINUING VALIDITY. Borrower understands and agrees that in modifying the
existing Obligations, Bank is relying upon Borrower’s representations, warranties, and agreements, as set forth in the Existing Loan Documents. Except as expressly modified pursuant to this Loan Modification Agreement, the terms of the Existing
Loan Documents remain unchanged and in full force and effect. Bank’s agreement to modifications to the existing Obligations pursuant to this Loan Modification Agreement in no way shall obligate Bank to make any future modifications to the
Obligations. Nothing in this Loan Modification Agreement shall constitute a satisfaction of the Obligations. It is the intention of Bank and Borrower to retain as liable parties all makers of Existing Loan Documents, unless the party is expressly
released by Bank in writing. No maker will be released by virtue of this Loan Modification Agreement. 
 10. COUNTERSIGNATURE. This Loan Modification
Agreement shall become effective only when it shall have been executed by Borrower and Bank. 
 [The remainder of this page is
intentionally left blank.] 

 This Loan Modification Agreement is executed as a sealed instrument under the laws of the
Commonwealth of Massachusetts as of the date first written above. 
  

									
	BORROWER:	 		 	BANK:
			
	ACACIA COMMUNICATIONS, INC.	 		 	SILICON VALLEY BANK
					
	By:	 	 /s/ Raj Shanmugaraj
	 		 	By:	 	 /s/ Nick Currie

					
	Name:	 	 Raj Shanmugaraj
	 		 	Name:	 	 Nick Currie

					
	Title:	 	 Chief Executive Officer
	 		 	Title:	 	 Vice PresidentEX-10.16

 Exhibit 10.16 

Confidential Materials omitted and filed separately with the 

Securities and Exchange Commission. Double asterisks denote omission. 

STRATEGIC PARTNERING AGREEMENT 
 This
Strategic Partnering Agreement (Agreement), effective as of 8 March 2011 (Effective Date), is between Acacia Communications, Inc., a Delaware corporation, with an address at Three Clock Tower Place,
Suite 210, Maynard, MA 01754 (Acacia), and ADVA Optical Networking North America, Inc., a Delaware corporation, with a place of business at 5755 Peachtree Industrial Boulevard, Norcross, Georgia 30092 USA
(ADVA or Customer) 
 WHEREAS, the parties desire to cooperate, under the terms and conditions set
forth herein, in connection with Acacia completing the design and development of the Product, delivering Prototypes for Customer’s trial use and evaluation and supplying Customer’s requirements for the Product. 

NOW, THEREFORE, In consideration of the premises and mutual covenants of the parties made herein, and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, and intending to be legally bound, the parties hereby agree as follows: 
  

	1.	DEFINITIONS. 

 “Strategic Partner” means an entity, which
has rights and privileges similar to those granted to ADVA in this Agreement. Acacia agrees to limit the total number of Strategic Partners that have early access to the AC100 100G coherent optical module to a total of [**] including ADVA/Juniper.

 “Confidential Information” means all financial, business and technical information of the disclosing party or any
of its affiliates, suppliers, customers and employees (including information about research, development, operations, marketing, transactions, discoveries, inventions, technologies, products, methods, processes, materials, algorithms, firmware,
specifications, designs, drawings, data, strategies, plans, roadmaps, know-how and ideas, whether tangible or intangible) that is disclosed by or for a party in relation to this Agreement, and that is marked or otherwise identified as proprietary or
confidential at the time of disclosure or that by its nature would be understood by a reasonable person to be proprietary or confidential, and all copies, abstracts, summaries, analyses and derivatives thereof. 

“Customer Application” means any product, system or other application in which ADVA (or its customer) includes or uses
in any product. 
 “Product” means Acacia’s AC100 100G coherent optical module including both hardware and
software and having features and functionality as described in this Agreement. 
 “Prototype” means any prototype,
engineering sample or other pre-production version of the Product. 
 “Product Specification” or
“Acacia Final Product Specification” means the mutually agreed technical specification for the final developed Product (the current version of which is attached hereto as Exhibit A) Upon written
mutual agreement the Specification may be revised to include additional detailed requirements. 

  
 Page 1 

 “Delivery” shall be according to EXW (INCOTERMS 2000) unless otherwise agreed and shall be in
accordance with the instructions of ADVA and is deemed to occur once the Products have been received at the designated delivery address. 

“Delivery Date” means the date of receipt of the Products by ADVA at the agreed delivery address. 

“Development Program Schedule” means Exhibit C attached hereto. 

“Early Sample” See Exhibit E - ADVA Acceptance Test
Criteria for 100G Module Samples for a full definition of this type product. 
 “Engineering
Sample” or “Engineering Sample Prototypes” See Exhibit E - ADVA Acceptance Test Criteria for 100G Module
Samples for a full definition of this type product. 
 “GA Product” indicates a generally available product and is
used as a designation for a product which is fully released for general use and purchase. See Exhibit E - ADVA Acceptance Test Criteria for 100G Module Samples and Exhibit A - Acacia Final Product
Specification for a full definition of this type product. 
 “ADVA Acceptance Criteria” means the agreed
performance criteria which must be met in order for ADVA to accept Early Samples and Engineering Sample Prototypes. This criteria is defined in Exhibit E - ADVA Acceptance Test Criteria for 100G Module Samples.

 “Lead Time” means the time between the date of issuance of the Purchase Order by ADVA and the Delivery Date. 

“Software” means any computer software programs in machine readable format, including but not limited to software code made available by
Acacia to ADVA as part of the Products. 
 “RMA” stands for Returned Material Authorization. 

“Reject Rate” means the ratio of total number of RMA units to total number of units delivered to ADVA within that same time period. In the
case where both Acacia and ADVA agree there was “no problem found” or that the reject was not caused by Acacia design deficiencies or manufacturing or handling deficiencies then the unit will not be classified as a reject for the purposes
of calculating a reject rate statistic. 
 “Epidemic Failure” means a Reject Rate of [**]% or above. The Reject Rate
calculation shall use a moving time window based on a period of [**] month intervals. An Epidemic Failure is declared if the Reject Rate associated with the same root cause found during any [**] month period divided by number of total units
delivered to ADVA during that same [**] month interval exceeds the Epidemic Failure Reject Rate as specified in this agreement. 
  

	2.	DEVELOPMENT PROGRAM. 

  

	2.1	 Performance Acacia agrees to undertake and use best efforts to perform the development services (Development Services)
in accordance with the either the Acacia Final Product 

  
 Page 2 

	 	
Specification or the ADVA Acceptance Tests for Acacia 100G Module Samples whichever is applicable, descriptions and/or schedules specified in the Development Program Schedule (which is attached
hereto as Exhibit C). ADVA agrees to purchase Software emulator evaluation board, Early sample and Engineering sample prototypes as detailed in Exhibit C for performance of the Development Services, in the amounts and at
the times specified in the Development Program Schedule. Each party will promptly inform the other of any event that may delay the timely development or delivery of the Development Services or Prototypes. 

 

	2.2	Milestone Dates. Exhibit C shows all major milestones for the development program. Some milestones do not contain external deliveries to ADVA and as such they are provided to ADVA for information.
Throughout the development program Acacia shall communicate to ADVA all changes to milestone schedule dates in Exhibit C. For project milestones containing a key deliverable product or service Acacia understands the importance to
maintain the originally agreed schedule dates. If Acacia must extend any key deliverable milestone schedule date (as indicated by “Key Deliverable Milestone #” column and “Schedule Date” column of Exhibit C by more
than [**] calendar days then ADVA may, at its discretion, terminate this Partnering Agreement. Alternately, upon Acacia extending any deliverable milestone date ADVA may impose a [**]% price reduction per calendar day up to [**]% of the purchase
price in the form of credits applied to future purchases for the late deliverable beginning on the [**] day after the original milestone date. 

  

	2.3	Milestone Acceptance. Upon delivery of each payable milestone listed in Exhibit C, ADVA shall have a [**] calendar day acceptance period to test and approve the deliverable. If the deliverable does
not meet the previously agreed ADVA Acceptance Criteria then ADVA must notify Acacia in writing. If ADVA does not provide written notification to Acacia within [**] calendar days then the deliverable may be deemed accepted by ADVA.

  

	2.4	Milestone Payments. Once each deliverable milestone is accepted by ADVA then ADVA shall pay Acacia the agreed amount within [**] days of written ADVA acceptance. Payment terms for generally available products may
be different and are determined by the mutually agreed terms and conditions contained within this document. 

  

	2.5	Design Infeasibility. Declaring infeasibility by either party will immediately invoke the Termination section of this Agreement. Infeasibility may be declared by either Acacia or ADVA by giving written notice to
the other party under the following cases: 1) ADVA may declare infeasibility if Acacia has not provided a fully specification compliant deliverable or not provided a fully specification compliant service to ADVA within [**] days after receiving
written notice of such failure delivered by ADVA after the originally scheduled milestone schedule date. The aforementioned specification is captured in “Exhibit E - Acceptance Test Criteria for 100G Module Samples” and
evolves starting with Early Sample then Engineering Sample prototype. For GA Products the Final Product Specification shall apply. 2) Acacia may declare infeasibility at any time during the Development Program if it is not possible for Acacia
despite using best efforts to meet the mutually agreed ADVA Acceptance Criteria or Acacia Final Product Specification whichever is applicable. 

  
 Page 3 

	2.6	Prototype Warranty Other than the afore mentioned acceptance period all Prototypes delivered to ADVA by Acacia shall have no warranty, 

 

	2.7	Services Warranty. Acacia warrants that the Development Services will be performed in a professional and workmanlike manner. Any warranty claim under this Section 2.7 must be made in writing within [**] days
after acceptance of the nonconforming Development Service. Acacia’s sole obligation and Customer’s exclusive remedy in respect thereof is to re-perform the nonconforming Development Service or, if a defect or a deficiency of the
Development Service cannot be cured within a - unless mutually agreed otherwise - [**] day period, at either party’s sole discretion, to terminate this Agreement and refund to ADVA all payments associated with this specific Development Service.

  

	2.8	Access. At mutually agreeable times, Acacia will provide reasonable access to ADVA for use of Acacia’s development test platforms at Acacia’s facility. Acacia will keep ADVA reasonably informed about
Product plans and roadmaps, and changes to the Product Specification. In addition to any technical review specified in the Development Program Schedule, Acacia will provide ADVA with reasonable access to its personnel who are performing the
Development Services. Such access shall be at mutually convenient times and places, and may include teleconferences, email and face-to-face meetings. 

  

	2.9	Assistance. ADVA agrees that successful performance of the Development Services will require the ongoing attention, assistance and cooperation of Customer. Accordingly, ADVA will furnish Acacia with
(a) technical feedback and suggestions related to the Product Specification and Products, Product evaluation results and other information related to ADVA Applications and (b) cooperation, technical assistance, resources and support, as
contemplated in the Development Program Schedule and as otherwise reasonably necessary or appropriate to design, develop and test the Prototypes or to perform the other Development Services. 

 

	2.10	Changes. At any time during the development program ADVA may propose changes to the Development Services or Acacia Final Product Specification by giving written notice to Acacia, describing the proposed
change in reasonable detail. Acacia will accept them by giving written notice if technically feasible and discuss same in good faith with ADVA subject to mutual agreement on associated cost and schedule impacts. No such change will be effective
without mutual agreement, as evidenced in a writing executed by both parties, 

  

	2.11	Coordination. Each party will appoint and identify an individual who will be responsible for coordinating and facilitating communication between Acacia and ADVA regarding all technical and business matters, and
who will possess sufficient authority to approve all changes under this Agreement. 

  

	2.12	Marketing Support. Upon Customer’s reasonable request from time to time. Acacia will assist ADVA in responding to carrier RFIs and RFPs, attend meetings (related to technical aspects of the Product) with
Customer’s prospective customers and represent Customer’s interests at OIF and other standard-setting bodies. 

  
 Page 4 

	2.13	Other Services. From time to time, ADVA may request and Acacia may agree to provide certain installation, custom development, consulting, training or other professional services. The terms and conditions of such
arrangement, if any, shall be only as set forth in a separate writing that is mutually agreeable to and executed by both parties. 

  

	2.14	Security. ADVA hereby agrees that Acacia retains a security interest and right of possession in Products until full payment is received. ADVA hereby authorizes Acacia to file a copy of the applicable invoice or
this Agreement as a financing statement, and agrees to execute any other documents (including UCC statements) and otherwise assist Acacia in perfecting and recording its security interest. 

 

	2.15	[**]. 

  

	2.16	Resale Prices. Nothing contained In this Agreement shall be deemed to limit in any way ADVA’s right to determine the price at which the Products may be resold by ADVA. 

 

	2.17	Head Start Rights for Technology and Products Acacia shall not sell or otherwise transfer AC 100 Samples to a non- Strategic Partner competitor of ADVA for a period of [**] months after first submitting Samples
to ADVA. 

  

	3.	PRODUCT SUPPORT. 

  

	3.1	ADVA. ADVA will provide commercially reasonable training, technical support and field services for the Products to its end user customers. ADVA will open and track all problem reports, and perform all initial
problem analysis, diagnosis and replication of problems. Before contacting Acacia for support, ADVA will use all commercially reasonable efforts to isolate any problem to the Products. 

 

	3.2	Acacia. Acacia will use all commercially reasonable efforts to provide ADVA (but not its customers) with technical support services for the Products in accordance with its standard practices (as in effect, from
time to time). ADVA agrees that Acacia will have the right to charge in accordance with its then current policies for any support or repair service (labor rate will be $[**]/hour for repair services and $[**]/hour for engineering services depending
on resources required) for (a) Products for which the warranty has expired, (b) problems, errors or inquiries related to systems, hardware or software other than the Product and (c) on-site services performed at Customer’s
request and without a need. 

  
 Page 5 

	4.	GENERAL TERMS AND CONDITIONS FOR PURCHASES. 

  

	4.1	Scope. From the Effective Date this Agreement shall govern the non-exclusive purchase and sale of Products and the license of certain associated Software provided by Acacia to ADVA or any of its majority owned or
controlled affiliates and subsidiaries (ADVA Affiliates), but only to ADVA Affiliates that agree in writing (delivered to Acacia) to be bound by all of the terms and conditions of this Agreement as if they were ADVA. Any default or
breach of any of the provisions of this Agreement by any ADVA Affiliate shall be deemed to be a default or breach by ADVA and ADVA hereby agrees to be fully liable for the acts and omissions of ADVA Affiliates. 

Acacia further agrees to provide Products to ADVA’s contract manufacturers at least under the same terms and conditions (including prices
as stated in Exhibit D) as agreed between Acacia and ADVA in this Agreement, but solely for resale by such contract manufacturers to ADVA. 
  

	4.2	Prices and Payment. 

  

	 	4.2.1	Prices. Prices for the Product are set out in Exhibit D and are deemed to include packaging charges and any additional charges according to the agreed Incoterms, but shall be exclusive of Value
Added Tax (“VAT”). Acacia shall invoice the applicable VAT for payment by ADVA. 

  

	 	4.2.2	Price Reviews. The prices stated in Exhibit D shall remain fixed for the [**] periods stated therein, notwithstanding that the Parties may agree to Product price reductions or increases during such
a period. 

  

	 	4.2.2.1	The Parties shall meet every [**] months or, upon ADVA’s request to discuss price reductions, giving due consideration to changes in market conditions, currency fluctuations and/or costs in components, raw
materials or manufacturing, new technology, labor, or interest rate changes. Where price reductions have been agreed, the prices stated in Exhibit D shall be immediately amended accordingly and shall apply to all Purchase Orders made
after the [**] day of the month following conclusion of the price review. 

  

	 	4.2.2.2	If Acacia intends to increase any Product prices, Acacia shall notify ADVA in writing at least [**] months prior to the end of the period stated in Exhibit D and shall provide the reasons for the intended
price increase such as raw materials and manufacturing costs, exchange rate fluctuations, new technology, labor, interest rate changes and market changes. The Parties shall agree the price within [**] months and such prices shall apply to all
Purchase Orders of that Product made after the [**] day of the month following conclusion of the price review. 

  

	 	4.2.3	 Payment Terms. Until December 31, 2012 Acacia will invoice ADVA the purchase price for the Products as set out in Exhibit D
within [**] days after shipment of the Products. All payments are due within [**] days after the Delivery 

  
 Page 6 

	 	
Date of a complete Delivery in accordance with a Purchase Order or [**] days after date of the invoice, whichever is later, however if payment is made within [**] days after the date of the
invoice, a [**] percent ([**]%) cash discount shall apply to the total amount payable under the invoice. Invoices shall be remitted to the billing address on the Purchase Order and must include relevant Purchase Order and part number. After
December 31, 2012 Acacia will invoice ADVA the purchase price for the Products as set out in Exhibit D within [**] days after shipment of the Products. All payments are due within [**] days after the Delivery Date of a complete
Delivery in accordance with a Purchase Order or [**] days after date of the invoice, whichever is later, however if payment is made within [**] days after the date of the invoice, a [**] percent ([**]%) cash discount shall apply to the total amount
payable under the invoice. Invoices shall be remitted to the billing address on the Purchase Order and must include relevant Purchase Order and part number. 

  

	4.3	Orders. 

  

	 	4.3.1	Volume Commitment. If it is commercially beneficial to ADVA, ADVA will make best effort to purchase greater than [**]% of ADVA’s 100G Coherent MSA requirements for calendar years 2011, 2012 and 2013.

  

	 	4.3.2	Purchase Orders. Purchase Orders for Products shall be submitted to Acacia in writing and may be sent via post, fax, email or other electronic communication. Each Purchase Order shall include: (i) date of
issuance, (ii) Purchase Order number, (iii) identification of Products ordered including part number and description, (iv) quantity of Products to be delivered, (v) price/discounts of Products ordered, (vi) requested
Delivery Date, (vii) Delivery Address, (viii) procurement agreement reference number and any specific delivery instructions such as freight carrier to be used. 

 

	 	4.3.3	Applicable Terms. The Parties agree that the terms and conditions of this Agreement will govern all Purchase Orders submitted by ADVA under this Agreement and will prevail over any and all other different or
additional terms and conditions of any kind proposed by ADVA or Acacia, e.g. in the Purchase Order or in Acacia’s quotation, acknowledgement, acceptance of purchase order or similar document, unless both Parties sign a document that expressly
states a deviation to this Agreement. Any such other terms and conditions provided by ADVA or Acacia shall not apply, even if the other party fails to expressly reject such terms and conditions or if Acacia delivers or ADVA accepts ordered products
without objection. 

  

	 	4.3.4	Acceptance of Purchase Order. Acacia shall within [**] working days of receipt thereof, accept and acknowledge in writing all Purchase Orders submitted by ADVA. In the event Acacia is not able to meet the
requested Delivery Date and quantities, Acacia will notify ADVA immediately after receipt of ADVA’s Purchase Order stating the anticipated length of the delay, the cause of the delay, measures proposed or taken to prevent or minimize the delay
and the timetable for implementing such measures. If such notification is not received within [**] working days, such Purchase Order is deemed rejected. 

  
 Page 7 

	 	4.3.5	Reschedules and Cancellation. ADVA may reschedule, (but not cancel) the agreed Delivery Dates a maximum amount of [**] times, upon [**] weeks notice, for up to [**] weeks after the original Delivery Date, without
incurring any liability whatsoever. 

  

	 	4.3.5.1	ADVA shall be entitled to cancel Purchase Orders wholly or partially up to [**] weeks prior to the original Delivery Date without charge for orders based on ADVA’s forecasted requirements. Purchase Orders cancelled
within [**] weeks of the original Delivery Date will incur a cancellation charge equal to [**] percent ([**]%) of the purchase price of the Products ordered, (Orders cannot be canceled within [**] weeks of the original Delivery Date.) in the event
the Reject Rates are above [**] percent ([**]%) during any [**] month period, ADVA shall be entitled to reschedule or cancel Purchase Orders without incurring any liability whatsoever. 

 

	 	4.3.6	Order Increases. Upon written request from ADVA, Acacia shall use its best efforts to: (i) deliver on the requested Delivery Date the number of items ordered by ADVA in excess of that set forth in
ADVA’s forecast; and (ii) deliver the Products in less than the expected Lead Time if so requested by ADVA. Acacia guarantees that ADVA shall be entitled to: Increase a Purchase Order by up to [**]% to be delivered in less than [**] weeks;
or increase a Purchase Order by up to [**]% to be delivered in less than [**] weeks; or increase a Purchase Order by [**]% or more to be delivered in [**] weeks. 

  

	 	4.3.7	Safety Stock. Once ADVA exceeds a $[**] revenue for the preceding [**] months Acacia will absorb the safety stock costs and undertake to hold a safety stock equivalent to at least [**] forecast (based on average
of [**] rolling forecast) of finished Products. Prior to this ADVA has the option to request that Acacia hold a safety stock equivalent to at least [**] forecast (based on average of [**] rolling forecast) of finished Products with a [**]% of
purchase price charge. An alternate safety stock agreement may be negotiated outside this agreement when mutual agreed and signed by both parties. 

  

	 	4.3.8	Production Allocation. In the event the supply of a particular Product or Part is constrained, Acacia will allocate a percentage of the available supply to ADVA equal to ADVA’s average order/supply
percentage for that Product as compared to all other Acacia’s customers, within the immediately preceding [**] days (e.g. if ADVA’s orders for the constrained Product during the preceding [**] days averaged to [**] percent ([**]%) of the
total amount supplied generally by Acacia to all it’s customers, ADVA would receive an [**] percent ([**]%) allocation of the available supply for the next [**] days). Where a Product is an NPI (New Products Introduction) product and there is
no reasonable [**] day order history, ADVA will receive an allocation of the available supply evenly distributed between the current Strategic Partners (e.g. if there are [**] strategic partners each would get a minimum of [**]% of the allocated
product). 

  
 Page 8 

	 	4.3.9	Forecasts. ADVA shall provide Acacia with a non-binding [**] rolling forecast of its requirements of Products for the following [**] period, provided Acacia will offer ADVA significantly shorter Product Lead
Times for forecasted quantities as set forth in Section 4.3.6. Within [**] of receiving ADVA’s forecast, Acacia shall acknowledge the receipt of the forecast and confirm to ADVA in writing that it can deliver all forecasted Products. If
Acacia foresees any problems (i.e. manufacturing capacity, material availability etc.) to meet the forecasted requirements, Acacia must advise ADVA before the end of the [**] period. 

 

	 	4.3.10	Continuing Availability, Product Support and Spares. For a period of at least [**] years following the end of this Agreement, Acacia shall continue to make support and parts for then current Products available to
be ordered by ADVA in accordance with the terms and conditions of this Agreement. If, during the term of this Agreement, Acacia discontinues a Product, Acacia will provide at least [**] months’ prior written notice of discontinuation of that
Product to ADVA via email to PCN-Team@advaoptical.com. During this [**] month period Acacia shall accept any Purchase Order for that Product with a Delivery Date requested by ADVA of up to [**] months after ADVA has received Acacia’s
notice to discontinue that Product. During the term of this Agreement and for a period of at least [**] years following the end of this Agreement or discontinuance of a Product, Acacia shall make a direct service support facility available for ADVA
to contact during its normal working hours regarding, without limitation, root cause analyses and error correction, and Acacia shall make spare parts available to ADVA irrespective of the warranty period set out in Section 5.2 below.

  

	4.4	Delivery. 

  

	 	4.4.1	Delivery. All Products shall be delivered EXW (Ex Works, Incoterms 2000) to the Delivery Address and in accordance with the applicable Purchase Order. Upon Delivery, title and all risk of loss or damage to
Products, shall pass to ADVA; provided, all documentation accompanying any Product and all Software are licensed (solely for use with the applicable Product), not sold, and title thereto shall not transfer to ADVA. 

 

	 	4.4.1.1	Acacia shall comply with the delivery instructions contained in the Purchase Order, unless the Parties agree otherwise in writing. Each Delivery shall be according the requirements stated in “Acacias’ Product
Packaging and Despatch: General Requirements for ADVA AG, ADVA Ltd, ADVA Inc.” 

  

	 	4.4.1.2	The dispatch data (flight number, airway bill number) of all Deliveries shall be provided to ADVA (to the contact person mentioned on the Purchase Order) by fax or email within [**] hours of dispatch. 

  
 Page 9 

	 	4.4.1.3	ADVA may, at its option, return, freight collect, all units received more than [**] days in advance or in excess of the quantity specified on its Purchase Order, or may, at its option, retain such units with payment
therefore deferred until it would otherwise be due. 

  

	 	4.4.1.4	Acacia’s delivery performance against first confirmed Delivery Date shall exceed [**]% and against last requested Delivery Date shall exceed [**]%. 

 

	 	4.4.2	Lead Times. Lead Times for forecasted Products shall be a maximum of [**] weeks and the Lead Times for non-forecasted Products shall be a maximum of [**] weeks. If Acacia is unable to meet Lead Times, then Acacia
shall notify ADVA immediately at least [**] weeks in advance of any Delivery Date. Acacia agrees to work with ADVA on significant lead time reductions for orders that ADVA declare as critical. Acacia commits to work with ADVA on supply chain
improvements e.g. by implementation of different logistics concepts such as VMI-Vendor Managed Inventory/SCS-Supplier managed consignment stock, Kan-Ban, just-in-time delivery etc. The contractual framework for such setups will be handled in a
separate document, effective only if, when and as set forth in a mutually acceptable written agreement that is executed and delivered by both parties. 

  

	 	4.4.3	Late Delivery. Acacia acknowledges that time for Delivery of Products is of the essence. In the event Acacia fails to meet the Delivery Date, ADVA may, at its option, (i) accept the revised Delivery Date, or
if the revised Delivery Date is more than [**] days behind the schedule, (ii) reschedule or (iii) cancel the Purchase Order without liability within [**] hours of Acacia’s notice of the delay notwithstanding the provisions set forth
in Section 4.3.5 (Reschedules and Cancellation) and Section 9.2 (Termination for Cause). Acacia shall pay a late delivery charge equal to [**] percent ([**]%) of the order value of the delayed goods per calendar day, up to a maximum of
[**] percent ([**]%), starting on the [**] calendar day after the first acknowledged or to requested Delivery Date, whichever is later in the form of credits against the current order or to be applied to future purchases at ADVA’s discretion.

  

	 	4.4.4	Provisioning of test data. Upon request, Acacia shall collect and provide test data for each supplied Part. All test data must include (i) Supplier Name, (ii) ADVA Part Number,_ (iii) PO Number,
and (iv) Delivery Date. 

  

	 	4.4.5	 Receiving Inspection. ADVA is entitled to carry out a receiving inspection of the Products delivered within reasonable time (but not more than
[**] days) after Delivery. The purpose of the receiving inspection is to establish that the Products comply with the Purchase Order. Receiving inspection shall be deemed to have been successfully performed in case no deviations from the order are
recorded. If ADVA discovers non-conformities from the requirements stated in the Purchase Order in question, ADVA shall immediately report the non-conformities to Acacia in writing and ADVA shall not have the obligation to pay the Products until
Acacia’s delivery is in conformance with the Purchase Order. The fact that ADVA 

  
 Page 10 

	 	
or its representative has not during the receiving inspection brought any defect to the attention of Acacia or its representative shall not relieve Acacia from its obligations under this
Agreement including warranties. 

  

	4.5	Quality. 

  

	 	4.5.1	Quality Assurance. Acacia acknowledges and accepts that commitment to quality is a primary requirement of ADVA. Acacia agrees to ensure continued quality improvement of Products provided under this Agreement.
Acacia also agrees to develop corrective action plans for any quality system deficiencies that may be detected by ADVA. ADVA will maintain quality assurance systems for the control of material quality, processing, assembly, testing, packaging and
delivery of Products in accordance with its usual policies and practices. Acacia agrees that the delivered Products meet the agreed Product Specifications and standards, mechanical drawings, manufacturing documentation and cosmetic specification.

 The workmanship standard to be used in building Product is IPC-A-610 latest Rev. Class 2, as published by the Institute for
Interconnecting and Packaging Electronic Circuits. Parties will conclude a separate quality assurance agreement on the Product. 
  

	 	4.5.2	Engineering Changes. Acacia shall propose ADVA as soon as possible any planned changes to the Product or Parts. Any change that Acacia proposes to any Product or Part, including any firmware or software
incorporated or embedded therein (except for immaterial changes to software code), and the documentation related thereto that has or may have a material adverse impact upon (i) reliability or (ii) Product Specifications or (iii) form,
fitness or function requires the prior approval of ADVA. Such approval shall not be unreasonably withheld or delayed. Acacia shall notify ADVA of such proposed change in due time prior to the release of the affected Product via email to
PCN-Team@advaoptical.com, except for those changes where an extremely unsatisfactory condition requires immediate action, in which case Acacia shall promptly advise ADVA of the change. Acacia shall at the time of notification, provide ADVA
with (i) a Product change number, (ii) a description of such change, (iii) the reason of such change, (iv) a description of the impact of such change upon reliability, Product Specifications, form, fit or function, (v) the
proposed price impact, if any, (vi) the proposed effective date and (vii) proposed identification of this changed Product for such change and its recommended implementation schedule, (viii) a last time buy window of [**] months from
the time of notification with a Delivery Date requested by ADVA of up to [**] months after ADVA has received Acacia’s notice to change that Product. 

  

	 	4.5.3	Quality Target I if not agreed otherwise in a separate quality assurance agreement, Products shall have a Reject Rate of less than [**] percent ([**]%) during any rolling [**] month period. In the event the
Reject Rates are above [**] percent ([**]%) and if more than [**] parts are being rejected during any such twelve (12) month period then Acacia commits to provide ADVA upon request a corrective action/root cause analysis within [**] days.

  
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	4.6	Return Materials Authorization (RMA) Procedure. 

  

	 	4.6.1	RMA Procedure. If any failure to conform to such Product Specification (“Defect”) is suspected in any Products, ADVA after obtaining a RMA form and number from Acacia, shall return, at Acacia’s
cost, the Product containing the Defect. Acacia shall issue ADVA an RMA number within [**] working days of ADVA’s request to return defective Product. Acacia shall analyze the failures and within [**] working days of receipt of defective
Product shall provide ADVA with the root cause analysis report and the corrective action to be followed, making use, when appropriate, of technical information provided by ADVA relating to the circumstances surrounding the failure.

  

	 	4.6.1.1	For product within the warranty period within [**] calendar days of receipt of non functional Product, Acacia shall, at ADVA’s option, either repair or replace the non functional Product with a new (unused and less
than [**] months old) replacement of the identical Product and return to ADVA in accordance with the terms and conditions of this Agreement. All repaired and replaced Products shall be warranted for the longer of [**] months or the remaining of the
warranty period of the Product that was repaired or replaced. In the event Acacia does not fulfill the obligations of this Section 4.6.1.1, Acacia shall at ADVA’s option either credit ADVA the purchase price of such Product or issue a
debit note for the purchase price of such Product. 

  

	 	4.6.1.2	In the event Acacia has a Reject Rate for any Product that is [**] percent ([**]%) or above for any [**] month rolling period Acacia shall mitigate the product costs to ADVA for the high Reject Rate.

  

	 	4.6.2	Determining Defects. For the purposes of Section 4.6.1, if it is questionable whether or not a Defect exists in a Product and/or whether or not a determined Defect is successfully cured and the Parties are
not able to resolve this question within a period of [**] working days, ADVA will provide Acacia the names and vitae of [**] independent sworn third party experts. From the list of mutually agreed names of qualified experts submitted to Acacia by
ADVA Acacia shall have the right to select one expert to provide a final and binding determination on that question. If a defect is determined to exist then Acacia pays for the product repair or replacement and the cost of the product experts. If no
defect is found then ADVA shall pay repair costs and product expert costs. 

  

	 	4.6.3	Epidemic Failures. In addition to the product warranty and for a period of [**] months from the date of Delivery of the Product to ADVA, Acacia warrants the Products against Epidemic Failure. In the event of an
Epidemic Failure, Acacia shall fully indemnify ADVA for reasonable inspection, testing and labor costs incurred in recovering and returning Products with Epidemic Failure and installing repaired or replacement Products notwithstanding that ADVA may
instead direct Acacia to hold reshipment of repaired or replacement Products until completion of failure analysis by Acacia or ADVA. 

  

	 	4.6.4	Repairs and Replacements. Acacia shall have the risk of loss or damage to defective and repaired or replacement Products while in Acacia’s possession and reshipment to the ADVA specific delivery address DDP
(Incoterms 2000), provided, however, that in the case of Products found to be in breach prior to acceptance by ADVA the risk of damage shall at all times remain with Acacia except for damage caused by an act or omission of ADVA. 

  
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	5.	REPRESENTATIONS AND WARRANTIES. 

  

	5.1	Warranty of Title. Acacia warrants and represents to ADVA that upon the Delivery by Acacia to ADVA of the Products, (i) ADVA shall apart from the regulation in Section 2.14 of this Agreement acquire
good and clear title to the Products, free and clear of all liens and encumbrances, (ii) Acacia has the full corporate power to enter into this Agreement, to carry out its obligations under this Agreement and to grant ADVA all necessary rights
and licenses under this Agreement. As of the date of this Agreement, Acacia represents that it has not received any notice or claim from a third party alleging that the Product or any part of a Product, infringes the proprietary rights of any third
party. 

  

	5.2	Product Warranty. Acacia warrants Products will be new (unused and less than [**]months old), free from any defects in material and workmanship and will conform to the Product Specifications. The warranty period
for all Products shall be [**] months for Hardware and [**] months for Software from the date of receipt at the Delivery Address. Acacia warrants that during the warranty period Software conforms to the Product Specifications and the applicable
Software documentation. Any warranty claim under this Section 5.2 must be made during the applicable [**] year period. Acacia’s sole obligation and ADVA’s exclusive remedy in respect thereof is to repair or replace any Product that is
defective or, at Acacia’s sole discretion, to accept return of such Product and credit the actual price paid to ADVA’s account. 

  

	5.3	Exclusions. These warranties shall not apply to any Product that was (a) used, handled, transported, operated, maintained or stored improperly, or in any manner not in accord with Acacia’s instructions
or recommendations or industry standard practices or (b) repaired, altered or modified other than by Acacia or its authorized agents. 

  

	5.4	Disclaimers. EXCEPT AS SPECIFICALLY PROVIDED HEREIN, ALL DEVELOPMENT SERVICES AND PRODUCTS ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND. ACACIA DOES NOT WARRANT THAT PRODUCTS OR SERVICES WILL BE
COMPATIBLE WITH ANY CUSTOMER APPLICATION OR OTHERWISE MEET CUSTOMER’S REQUIREMENTS. ACACIA HEREBY DISCLAIMS (FOR ITSELF AND ITS SUPPLIERS) ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, ORAL OR WRITTEN, INCLUDING WITHOUT LIMITATION, ALL IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE AND ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR PERFORMANCE OR USAGE OF TRADE. ADVA ACKNOWLEDGES THAT IT IS RESPONSIBLE FOR THE SELECTION OF THE PRODUCT AND ALL RESULTS
OBTAINED FROM ITS USE OF THE PRODUCTS IN ADVA APPLICATIONS AND THAT ADVA HAS RELIED SOLELY ON ITS OWN TECHNICAL AND COMMERCIAL EXPERTISE, EXPERIENCE AND ANALYSES IN DECIDING TO ENTER INTO THIS AGREEMENT. 

  
 Page 13 

	6.	INTELLECTUAL PROPERTY. 

  

	6.1	Rights in Intellectual Properly. No title or other ownership rights to intellectual property in any Products or any copies thereof shall pass to ADVA under this Agreement or any performance hereunder. As between
the parties, Acacia shall own and retain all rights, title and interests (including without limitation, all patent rights, copyright rights, trade secret rights and other intellectual property and proprietary rights) embodied in the results of the
Development Services, Products, Product Specification and other Acacia Confidential Information. 

  

	6.2	Product Software License Grant. ADVA shall have a non-exclusive, perpetual license to use, adapt, copy, and distribute internationally Acacia’s Software and any firmware used solely with or embedded in the
Product, In executable form only solely as used with or embedded in Product furnished to ADVA by Acacia under this Agreement in order to enable ADVA’s customers to use Acacia’s Software and firmware used solely with or embedded in the
Product or in any form for ADVA’s internal testing, error correction or back up purposes. ADVA will not itself, nor permit any of its licensees to, reverse compile or disassemble the Software, nor will ADVA reproduce the Software for the
purpose of furnishing it to others or for any other purpose not expressly permitted under this Agreement. 

  

	6.3	Restrictions. Except as specifically permitted in this Agreement, ADVA shall not directly or indirectly: (a) use any of Acacia’s Confidential Information to create any product or Product Specification
that is similar to the Product or Product Specification; (b) disassemble, decompile, reverse engineer or use any other means to attempt to discover any underlying ideas, algorithms or organization of the Products; or (c) permit any third
party to do so. ADVA shall not (and shall not permit any third party to) alter, obscure or remove any patent notice, trademark or other proprietary or legal notice contained on any Product, packaging or documentation. 

 

	6.4	General Learning. ADVA agrees that Acacia is free to reuse all generalized knowledge, experience, know-how and technologies (including ideas, concepts, processes and techniques) related to the Products or
acquired during performance of the Development Services (including without limitation, that which it could have acquired performing the same or similar services for another ADVA), and that Acacia is free to practice, use and exploit all suggestions
ADVA makes regarding the Product (including in respect of any correction, improvement or enhancement). 

  

	7.	CONFIDENTIALITY. 

  

	7.1	 Obligations. During the term of this Agreement and for a period of [**] years thereafter, the Parties shall not directly or indirectly, use the
other Party’s Confidential Information for their own benefit or for the benefit of a third party, and shall not disclose such Confidential Information to any third party, other than the Parties’ employees or authorized

  
 Page 14 

	 	
contractors solely on a “need to know” basis, without the prior written consent of the other Party. The Parties shall use reasonable care to safeguard the other’s Confidential
Information against unauthorized access, use and disclosure. Each Party shall be responsible for any breach of confidentiality by its employees and contractors. Promptly after any termination of this Agreement (or at the disclosing Party’s
request at any other time), the receiving Party shall return all of the other’s tangible Confidential Information, permanently erase all Confidential Information from any storage media and destroy all information, records and materials
developed therefrom. Each Party may disclose only the general nature, but not the specific terms, of this Agreement without the prior consent of the other party; provided, either Party may provide a copy of this Agreement or otherwise
disclose its terms in connection with any legal or regulatory requirement, financing transaction or due diligence inquiry. 

  

	7.2	Exceptions. Confidential Information will not include information that: (i) is in or enters the public domain without breach of this Agreement or fault of the receiving Party, (ii) the receiving Party
lawfully receives from a third party without restriction on disclosure and without breach of any nondisclosure obligation, (iii) the receiving Party develops independently without any use of the Confidential Information, which it can prove with
written evidence and (iv) any information legally required to be disclosed and subject to prior information to the disclosing party. 

  

	8.	INDEMNITY. 

  

	8.1	Intellectual Property Indemnity. Acacia shall defend, indemnify and hold harmless ADVA from all third party claims of infringement against ADVA alleging that any Product infringes or violates any patent,
copyright, trademark or trade secret. In such event. Acacia, at its option and expense, shall (i) reimburse ADVA for any costs incurred at Acacia’s written request relating to such claim; and (ii) pay damages and costs assessed by
final judgment against ADVA and attributable to such claim (including reasonable attorney fees). In addition, if the Product becomes or, in Acacia’s opinion, is likely to become the subject of any injunction preventing its manufacture, sale or
use as contemplated herein, Acacia shall either (i) procure for ADVA the right to continue using such Product, or (ii) replace or modify any such Product provided or to be provided to be free of the infringement provided that such
replacement or modified Product materially conforms with Product Specifications. If Acacia is unable to achieve either of the options set forth above despite its reasonable best efforts, it may terminate this Agreement upon written notice to ADVA
and shall require return of such Product freight collect to Acacia and promptly refund to ADVA the purchase price, amortized on a straight-line basis over a five (5) year period from Delivery. The foregoing states the entire liability of
Acacia, and ADVA’s exclusive remedy, with respect to any actual or alleged violation of intellectual property rights by any Product, any part thereof or by its use or operation. 

 

	8.2	Third Party Indemnity. Acacia will indemnify, hold harmless, and defend ADVA from and against any and all liabilities, damages, losses, costs and expenses (including but not limited to reasonable legal and other
professional fees) payable to third parties to the extent based upon any product liability claim caused by any Product that fails to conform to the warranty in Section 5.2 or other third party claim arising from Acacia’s failure to perform
its obligations under this Agreement. 

  
 Page 15 

	8.3	Exceptions. Acacia shall have no liability or obligation hereunder with respect to any claim attributable to (a) any use of a Product not strictly in accord with this Agreement, or in an application or
environment or on a platform or with devices for which it was not designed or contemplated, (b) alterations, combinations or enhancements of the Product not created by or for Acacia, (c) ADVA’s continuing allegedly infringing activity
after being notified thereof or its continuing use of any version of the Product after being provided modifications that would have avoided the claim, (d) Products that comply in whole or in part with ADVA’s designs, Product
Specifications, instructions or technical information or (e) any intellectual property right in which ADVA or any of its affiliates has an interest. 

  

	8.4	ADVA Indemnity. ADVA agrees to (a) defend Acacia against any demand, suit, action or other claim by a third party that is related to any Customer Application, any representation, warranty or other statement
concerning the Products made by or for ADVA (except those which conform to the Product Specification), Customer’s violation of any applicable law or regulation, Customer’s negligence, misconduct or breach of this Agreement or actions
excluded under Section 8.3, and (b) indemnify Acacia for settlement amounts or damages, liabilities, costs and expenses (including reasonable attorneys’ fees) awarded and arising out of such claim. 

 

	8.5	Conditions. The indemnifying Party’s obligations hereunder are conditioned on (a) the Party seeking indemnification providing prompt written notice thereof and reasonable cooperation, information, and
assistance in connection therewith and (b) the Indemnifying Party having sole control and authority to defend, settle or compromise such claim. The indemnifying Party shall not be responsible for any settlement it does not approve in writing.
The indemnifying shall not settle any such claim, without the indemnified Party’s prior written consent (not to be unreasonably delayed or withheld), if such settlement would limit the indemnified Party’s exercise of its rights under this
Agreement or would require the indemnified Party to pay any compensation or to assume any obligations. The indemnified Party reserves the right to retain counsel, at its own expense, to participate in the defense and settlement of any such claim.

  

	9.	TERM AND TERMINATION. 

  

	9.1	Term. This Agreement shall commence on the Effective Date and continue in effect for an initial term of five (5) years (Initial Term). Unless terminated earlier as permitted herein, this
Agreement will be extended automatically for additional terms of one (1) year at the end of the Initial Term and each renewal term. However, either party may elect not to renew this Agreement by giving written notice thereof to the other party
at least thirty (30) days prior to the end of the then current term. 

  
 Page 16 

	9.2	Termination. Either party may terminate this Agreement 

  

	 	(a)	if either party declares the development project to be infeasible in accordance with Section 2.5 of this Agreement. 

  

	 	(b)	If the other party breaches a material provision of this Agreement and fails to cure such breach within [**] days ([**] days in the case of any non-payment) after receiving written notice of such breach from the
non-breaching party, or 

  

	 	(c)	immediately upon written notice, if the other party makes an assignment for the benefit of creditors, or a receiver, trustee in bankruptcy or similar officer is appointed to take charge of any or all of the other
party’s property, or the other party seeks protection under any bankruptcy, receivership, trust deed, creditors arrangement, composition or comparable proceeding or such a proceeding is instituted against the other party and is not dismissed
within 90 days, or the other party becomes insolvent or, without a successor, dissolves, liquidates or otherwise fails to operate in the ordinary course. 

  

	9.3	Orders After Termination. Acceptance of ADVA’s orders after termination shall not constitute a renewal of this Agreement or waiver of the right of Acacia to treat this Agreement as terminated.

  

	9.4	Effects of Termination. 

  

	 	9.4.1	If either party terminates this Agreement for reasons of infeasibility as defined in Section 2.5, ADVA shall have no further debts or obligations regarding this Agreement, other than amounts already due.

  

	 	9.4.2	If Acacia terminates this Agreement due to material breach by ADVA then ADVA shall be liable for payment of all previously accepted milestones and shall negotiate payment in good faith with Acacia on the costs related
to future milestone deliverables, and ADVA shall remain liable for all payments for Products delivered prior to the effective date of termination. 

  

	 	9.4.3	Upon any expiration or termination of this Agreement for any reasons all rights and obligations of the parties hereunder shall cease including payment for any deliverables not already accepted by ADVA according to the
Milestone Acceptance provisions of this Agreement. In any case the following shall survive: (a) payment obligations only for generally available products (does not apply to products still under development); (b) all remedies for breach of
this Agreement; and (c) the provisions of Sections 4.6 (RMA Procedure), 5 (Representations and Warranties), 6 (Intellectual Property), 7 (Confidentiality), 8 (Indemnity), 10 (Limitations of Liability), 11 (Miscellaneous) and this
Section 9. Additionally, Acacia shall continue to provide warranty support as set forth above and any agreed maintenance support as required In 4.3.10 (Continued Availability, Product Support and Sparing). 

 

	9.5	 No Further Liability. Each party agrees that the rights of termination hereunder are absolute and it has no right to a continued relationship
with the other after termination (except as expressly stated herein). Neither party shall incur any liability whatsoever for 

  
 Page 17 

	 	
any damage, loss or expense of any kind suffered or incurred by the other (or for any compensation to the other) arising from or incident to any termination of this Agreement by such party that
complies with the terms of the Agreement whether or not such party is aware of any such damage, loss or expense. 

  

	9.6	Return of Materials Upon Termination. On or before [**] days after the termination of this Agreement, the Parties shall deliver up all Confidential Information in its possession belonging to that other Party and,
upon request, confirm delivery or complete destruction thereof in writing to the other party. 

  

	10.	LIMITATION OF LIABILITY. 

 Nothing in this Agreement shall limit either
Party’s liability for damage caused by intentional misconduct, for death or personal injury, and for breaches of its confidentiality obligations. 

Neither Party shall have any liability for any incidental, special, indirect or consequential damages. 

Each Party’s maximum aggregate liability arising out of, or in connection with, this Agreement shall be limited to fifty percent
(50%) of the aggregate value of the charges paid by ADVA to Acacia in the preceding calendar year or one million US Dollars (USD$ 1,000,000) whichever is the greater. 

THESE LIMITATIONS ARE INDEPENDENT FROM ALL OTHER PROVISIONS OF THIS AGREEMENT AND SHALL APPLY NOTWITHSTANDING THE FAILURE OF ANY REMEDY
PROVIDED HEREIN, AND ARE INTENDED TO APPLY TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, REGARDLESS OF THE FORM OF ANY CLAIM OR ACTION (WHETHER IN CONTRACT, NEGLIGENCE, STRICT LIABILITY OR OTHERWISE), EVEN IF THE PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES 
  

	11.	MISCELLANEOUS. 

  

	11.1	Amendments/Notices. Any notice under this Agreement shall be in writing, in English and shall be personally delivered or sent by a reputable overnight mail service (e.g. Federal Express), or by first class mail
(certified or registered), or by facsimile confirmed by first class mail (registered or certified), to the person designated below: 

  

			
	ADVA AG Optical Networking	  	Acacia Communications, Inc.
		
	Att: Legal Department	  	Att:
		
	Fraunhoferstrasse 9a	  	
		
	82152 Martinsried/Munich,	  	Three Clock Tower Place, Suite 210
		
	GERMANY	  	Maynard, MA 01754, USA
		
	Fax: +49-89-890665 199	  	Fax: +1-978-938-4899

 Notices will be deemed effective upon receipt. 

  
 Page 18 

	11.2	Disclosure. Except as provided herein, Acacia shall not, without ADVA’s prior written consent, engage in publicity related to this Agreement, or make public use of any identification in any circumstances
related to this Agreement, to ADVA or ADVA’s products. “Identification” means any semblance of any trade name, trademark, service mark, insignia, symbol, logo, or any other designation or drawing of ADVA. Acacia shall remove or
obliterate any identification prior to any use or disposition of any Product rejected or not purchased by ADVA. 

  

	11.3	Compliance with Laws. Acacia warrants that Products supplied under this Agreement comply with all applicable federal, state, local laws, ordinances and regulations which are now or become in force, including but
not limited to the Restriction of the Use of certain Hazardous Substances in Electrical and Electronic Equipment (“RoHS” Directive 2002/95/EC) and Waste Electrical and Electronics Equipment (“WEEE” Directive 2002/96/EC). In
addition, Acacia acknowledges and accepts that Corporate Social Responsibility and sourcing with human dignity is an elementary part of doing business with ADVA. Therefore Acacia warrants to comply with International Ethical Standards which are
based upon the United Nations Universal Declaration of Human Rights (http://www.un.org/Overview/rights.html), the International Labour Law Organisation Convention and the guidelines established by the Chartered Institute of Purchasing and Supply
(http://www.cips.org/). 

  

	11.4	Force Majeure. Neither Party to this Agreement shall be held responsible for the performance of any obligations under this Agreement provided such performance is hindered or prevented by any circumstances of
Force Majeure which are beyond its reasonable control, such as riot, strike, lock-out, flood, or other natural catastrophes or national or local Government regulations and provided the Party frustrated notifies the other Party without delay in
writing at the beginning and end of any such circumstances. The Party frustrated shall use every endeavour to minimize the hindrance or prevention of such fulfillment. Upon the ending of such circumstance, the frustrated Party shall without delay
resume the fulfillment of its obligations including any obligations, the performance of which was interrupted thereby. 

  

	11.5	Import and Export. The Parties acknowledge that any Products, Software and technical information (including, but not limited to, services and training) provided under this Agreement may be subject to United
States, German or other export laws and regulations and any use or transfer of such Products, Software and technical information must be authorized under those laws and regulations. The Parties agree that they will not use, distribute, transfer, or
transmit the Products, Software or technical information (even if incorporated Into other products) except in compliance with such export regulations. Acacia shall cooperate with ADVA and provide reasonable supporting information under its control
that is necessary or useful for ADVA to comply with such regulations to export the Products. 

  
 Page 19 

	11.6	Relationship of Parties. The Parties are Independent contractors under this Agreement and the Parties do not intend to create any partnership, franchise, joint venture, agency, employer/employee, fiduciary,
master/servant relationship, or other special relationship. Neither Party shall act in a manner that expresses or implies a relationship other than that of independent contractor, nor bind the other Party. 

 

	11.7	No Third Party Beneficiaries. Unless otherwise expressly provided, no provisions of this Agreement are intended or shall be construed to confer upon or give to any person or entity other than ADVA and Acacia any
rights, remedies or other benefits under or by reason of this Agreement. 

  

	11.8	Waiver and Modification. Failure by either Party to enforce any provision of this Agreement will not be deemed a waiver of future enforcement of that or any other provision. Any waiver, amendment or other
modification of any provision of this Agreement will be effective only if in writing and signed by the Parties. 

  

	11.9	Severability. If for any reason a court of competent jurisdiction finds any provision of this Agreement to be unenforceable, that provision of this Agreement will be enforced to the maximum extent permissible so
as to affect the intent of the Parties, and the remainder of this Agreement will continue in full force and effect. 

  

	11.10	Entire Agreement. All Exhibits referenced herein are hereby incorporated by such reference and made a part of this Agreement. This Agreement together with its Exhibits constitutes the entire agreement between the
Parties with respect to the subject matter hereof, and supersedes and replaces all prior and contemporaneous understandings or agreements, written or oral, regarding such subject matter. No modifications or amendments shall be made to this Agreement
unless in writing and signed by authorized representatives of the Parties. 

  

	11.11	Publicity. Within [**] days after the Effective Date, the parties (jointly or separately, as the parties may decide) shall issue a press release approved by both parties (such approval not to be unreasonably
delayed or withheld) concerning the arrangements in this Agreement. ADVA authorizes Acacia to include ADVA’s name in customer listings that may be published as part of Acacia’s marketing efforts. From time to time upon Acacia’s
request, ADVA agrees to provide Acacia with reasonable cooperation and assistance in connection with such efforts (such as, for example, by acting as a reference, issuing press releases and writing customer testimonials and case studies, with
statements attributed to a named employee of Customer), 

  

	11.12	Force Majeure. Notwithstanding any other provision of this Agreement, Acacia’s obligation to supply Products to ADVA is subject to availability and Acacia’s other obligations. Acacia shall not be liable
for damages caused by any delay or failure to deliver resulting from conditions beyond its reasonable control (including without limitation, manufacturing yield failures or unavailability resulting from an inability to (a) obtain needed
materials, equipment or supplies at commercially reasonable prices or (b) produce sufficient Products to meet the demands of all its customers). 

  
 Page 20 

	11.13	Governing Law and Jurisdiction. This Agreement shall be governed by and construed in accordance with the laws of the state of New York, USA, without regard to its conflicts of law provisions. In the event of any
conflict between US and foreign laws, regulations and rules, US laws, regulations and rules shall govern. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement. The sole jurisdiction and
venue for actions related to this Agreement will be the state or federal courts located in New York, and both parties consent to the jurisdiction of such courts with respect to any such action. In any action or proceeding to enforce this Agreement,
the prevailing party will be entitled to recover from the other party its costs and expenses (including reasonable attorneys’ fees) incurred in connection with such action or proceeding and enforcing any judgment or order obtained. Courts
located at defendant’s general place of business as stated at the beginning of this Agreement shall have exclusive jurisdiction for any dispute arising out of or in connection with this Agreement. 

 

	11.14	Compliance With Laws. ADVA shall comply with all applicable laws and regulations (including export control laws, restrictions and regulations of any US or foreign agency or authority). ADVA will not and will not
allow, directly or indirectly, the use, transmission, export, re-export or other transfer of any product, technology or information it obtains or learns pursuant to this Agreement (or any direct product thereof) in violation of any such law,
restriction or regulation. ADVA shall be responsible for obtaining any necessary license or approval and otherwise complying with the latest US export regulations. 

 

	11.15	Remedies. Except as specifically provided otherwise, each right and remedy in this Agreement is in addition to any other right or remedy, at law or in equity. Each party agrees that, in the event of any breach or
threatened breach of Section 6 or 7, the non-breaching party will suffer irreparable damage for which it will have no adequate remedy at law. Accordingly, the non-breaching party shall be entitled to injunctive and other equitable remedies to
prevent or restrain such breach or threatened breach, without the necessity of posting any bond. 

  

	11.16	Assignment. This Agreement and the rights and obligations hereunder may not be assigned, in whole or in part, by either party without the other party’s prior written consent, not to be unreasonably withheld.
However, without consent, ADVA or Acacia may assign this Agreement to any of its affiliates or to any successor to all or substantially all of its business which concerns this Agreement (whether by sale of assets or equity, merger, consolidation or
otherwise), This Agreement shall be binding upon, and inure to the benefit of, the successors, representatives and permitted assigns of the parties, 

  
 Page 21 

 IN WITNESS WHEREOF, Intending to be legally bound, the parties have caused their duly authorized officers
to execute this Agreement as a sealed instrument, as of the Effective Date. 
  

									
	ACACIA COMMUNICATIONS INC.	 		 	ADVA OPTICAL NETWORKING N.A., INC.
					
	By:	 	 /s/ Raj Shanmugaraj
	 		 	By:	 	 /s/ Christoph Glingener

					
	Name:	 	Raj Shanmugaraj	 		 	Name:	 	Christoph Glingener
					
	Title:	 	CEO and President	 		 	Title:	 	CTO
					
		 		 		 	By:	 	 /s/ Scott Garett For Bernd Stucke

					
		 		 		 	Name:	 	Bernd Stucke
					
		 		 		 	Title:	 	Director Global Strategic Procurement

  
 Page 22 

 Exhibit A - Acacia Final Product Specification 

Advanced Optical Specification 

100G DWDM Module based on coherent detection 

and advanced digital signal processing 
  

			
	Title	  	Advanced Specs for 100G DWDM module
	Authors	  	Benny Mikkelsen
	Revision number	  	1.0
	Date	  	October 26, 2010
	Document Number	  	075-0010-00

  

	1.	Table of Contents 

  

											
	1.	 	TABLE OF CONTENTS	  	 	23	  
			
	2.	 	REVISION HISTORY	  	 	23	  
			
	3.	 	OVERVIEW	  	 	24	  
			
	4.	 	SPECIFICATIONS	  	 	24	  
				
		 	4.1	 	Optical interface specifications	  	 	24	  
					
		 		 	4.1.1	 	General specifications	  	 	24	  
					
		 		 	4.1.2	 	Transmitter specifications	  	 	26	  
					
		 		 	4.1.3	 	Receiver specifications	  	 	26	  
				
		 	4.2	 	Environmental and thermal specifications	  	 	28	  
				
		 	4.3	 	Safety and regulatory specifications	  	 	29	  
				
		 	4.4	 	Reliability specifications	  	 	30	  

  

	2.	Revision History 

  

							
	 Revision
	  	 Date
	  	 Author
	  	 Changes

	0.1	  	Nov 19, 2009	  	Benny Mikkelsen	  	
	0.2	  	Dec 15, 2009	  	Benny Mikkelsen	  	Minor updates
	0.3	  	Jan 08, 2010	  	Benny Mikkelsen	  	Mechanical drawings added
	0.4	  	June 04, 2010	  	Benny Mikkelsen	  	Minor updates
	0.5	  	July 12, 2010	  	Benny Mikkelsen	  	Minor updates
	0.6	  	Aug 18, 2010	  	Benny Mikkelsen	  	Updated mechanical drawing and C-band X
	0.7	  	Aug 23, 2010	  	Benny Mikkelsen	  	Updated TX and RX power range
	0.8	  	Sept 7, 2010	  	Benny Mikkelsen	  	Several updates including multi channel spec, filter tolerance, PRBS insertion clarification
	0.9	  	Oct 14, 2010	  	Benny Mikkelsen	  	Updated PMD specs
	1.0	  	Oct 26, 2010	  	Benny Mikkelsen	  	Updated output power. Deleted HW interface specs (see separate Acacia document)

  
 Page 23 

	3.	Overview 

 This document describes the Advanced Product Specifications for Acacia’s 100G DWDM module
based on coherent detection and advanced electronic link equalization. The module is intended to be used on system integrators host boards to support transmission over DWDM links in Long-haul, Regional and Metro networks, 

 

	4.	Specifications 

 All specifications given in this document are End-of-Life numbers and are valid over
case temperature from -5°C to +70°C. 
  

	4.1	Optical interface specifications 

  

	4.1.1	General specifications 

  

													
	 Ref
	  	 Parameter
	  	 Condition/comments
	 	 Typical
	 	 Min
	 	 Max
	 	 Unit

	[**]	  	[**]	  	[**]	 		 		 		 	
							
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 Page 24 

 Confidential Materials omitted and filed separately with the Securities and Exchange Commission. A total of two
pages were omitted. [**] 

  
 Page 25 

	4.1.2	Transmitter specifications 

  

													
	 Ref.
	  	 Parameter
	  	 Condition/comments
	 	 Typical
	 	 Min
	 	 Max
	 	 Unit

	[**]	  	[**]	  	[**]	 	[**]	 	[**]	 	[**]	 	[**]
							
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	[**]	  	[**]	  	[**]	 	[**]	 	[**]	 	[**]	 	[**]

  

	4.1.3	Receiver specifications 

  

													
	 Ref
	  	 Parameter
	  	 Condition/comments
	 	 Typical
	 	 Min
	 	 Max
	 	 Unit

	[**]	  	[**]	  	[**]	 	[**]	 	[**]	 	[**]	 	[**]
							
	[**]	  	[**]	  	[**]	 	[**]	 	[**]	 	[**]	 	[**]
					
	[**]	  	[**]	  	[**]	 	[**]	 	[**]
						
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 Page 26 

													
	 Ref
	  	 Parameter
	  	 Condition/comments
	 	 Typical
	 	 Min
	 	 Max
	 	 Unit

	[**]	  	[**]	  	[**]	 	[**]	 	[**]	 	[**]	 	[**]
							
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 Confidential Materials omitted and filed separately with the Securities and Exchange Commission. A total of one page was
omitted. [**] 

  
 Page 27 

	4.2	Environmental and thermal specifications 

  

													
	 Ref
	  	 Parameter
	  	 Condition/comments
	 	 Typical
	 	 Min
	 	 Max
	 	 Unit

	[**]	  	[**]	  	[**]	 		 	[**]	 	[**]	 	[**]
							
	[**]	  	[**]	  	[**]	 		 	[**]	 	[**]	 	[**]
							
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 Page 28 

	4.3	Safety and regulatory specifications 

  

													
	 Ref
	  	 Parameter
	  	 Condition/comments
	 	 Typical
	 	 Min
	 	 Max
	 	 Unit

	[**]	  	[**]	  	[**]	 		 		 		 	
							
	[**]	  	[**]	  	[**]	 		 		 		 	
							
	[**]	  	[**]	  	[**]	 		 		 		 	
							
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 Page 29 

	4.4	Reliability specifications 

  

													
	 Ref
	  	 Parameter
	  	 Condition/comments
	 	 Typical
	 	 Min
	 	 Max
	 	 Unit

	[**]	  	[**]	  	[**]	 	[**]	 		 		 	[**]
							
	[**]	  	[**]	  	[**]	 		 		 		 	

  
 Page 30 

 Exhibit B - 100G Software emulator evaluation board

 Description 

Acacia’s 100G Software Emulation/Hardware Evaluation platform is a multipurpose tool provided to support R&D teams during development and test of 100G
line cards. 
 

 
 AC100-EB Overview 
 The
AC100-EB is a two slot ATCA line card that can be used either in an ATCA chassis or stand alone on a lab bench. 
 Primary capabilities are: 

Software emulation 
 Test platform for AC100 module for both
optical and electrical testing 
 Support for OTL 4.10 interconnect to JDSU 100G tester via CFP break out board 

Software emulator 
 In the early stage of system
development customers can use the Software emulator platform to begin preliminary Software development. By implementing

 
the MDIO slave interface we enable software developers to design to the MDIO interface before actual Hardware is available. The emulator will support basic functionality listed below: 

Read/write of module registers 
 Firmware download 

Emulation for non-MDIO control pins/state transitions (PRG_CNTL[1..3], TX_DIS, MOD_LOPWR, MOD_RSTn) 

Hardware evaluation board 
 The evaluation board is a
standalone platform that provides the capability to verify and characterize the 100G module. The MDIO signals are available through the front panel of the ATCA line card which enables direct access to the MDIO hardware pins of the module. Host side
high speed data access to and from the module can be tested through a CFP style break out module. This break out module is designed to interoperate with JDSU’s 100G test equipment. 
 

 
 100G Evaluation Platform includes: 

Power supplies 
 FPGA/Micro to provide a bridging functionality

 Ethernet support 
 168-pin Hirose header 

CFP style breakout board to provide access to high speed data lanes to and from the module 

SMA access to various reference clocks

 

  
 Page 31 

 Exhibit C - 100G Coherent Optical Module 

Development Program Schedule 
  

									
	 Key Deliverable
Milestone #
	  	 Development Project Milestones and Deliverables
	  	 Schedule Date
	  	 Unit Price
	  	 Total

		  	Preliminary thermal & mechanical models	  	[**]	  		  	
		  	Advanced product specification	  	[**]	  		  	
					
		  	Block processing test platform (Acacia labs)	  	[**]	  		  	
					
		  	ASIC initial floor plan	  	[**]	  		  	
					
		  	1000k fiber + PMD emulator test system	  	[**]	  		  	
					
		  	Mechanical models	  	[**]	  		  	
					
		  	Initial ASIC netlist	  	[**]	  		  	
					
		  	Sign Agreement (estimate)	  	[**]	  		  	
					
		  	Early prototype of SW emulator board (ADVA order placement)	  	[**]	  	[**]	  	[**]
	1	  	Mechanical samples delivered (30 days after signing)	  	[**]	  		  	
		  	Final ASIC netlist	  	[**]	  		  	
					
		  	Module hardware design completed	  	[**]	  		  	
					
		  	SW emulator evaluation board kit complete (1 (unit)* Delivered to ADVA	  	[**]	  		  	
		  	Agree to acceptance criteria for early, engineering, and pre-production samples	  	[**]	  		  	
		  	ASIC tape out	  	[**]	  		  	
					
	2	  	Early samples of module (2 units), earlier if possible	  	[**]	  	[**]	  	[**]
		  	Preliminary product specification	  	[**]	  		  	
					
	3	  	Engineering samples of module (7-12 units)**	  	[**]	  	[**]	  	[**]
		  	Test and Cal stations to CM	  	[**]	  		  	
					
		  	Pre-production samples (completed DVT and submitted to Telcordia qualification) ordered no later than 3/15/2010	  	[**]	  	[**]	  	[**]
	4	  	Final Product specification	  	[**]	  		  	
					
		  	GA of production samples	  	[**]	  		  	
		  		  		  		  	  

			
	SUMMARY	  	Total prototypes and evaluation board	  	[**]
		  		  		  		  	  

  

	*	Additional software emulator evaluation board price = $[**] 

	**	Additional engineering samples (5 units) are available as long as Acacia is notified by [**] or ordered based on [**] lead time with forecast. 

  
 Page 32 

 Exhibit D - 100G Coherent Optical Module Strategic Partner Price Matrix 

 

											
	 K$
	  	 Prototypes
	  	 Strategic Partner Production Pricing

	 	  	 	  	 0-99
	  	 100-499
	  	 500-999
	  	 >1000

	2011	  	[**]	  	[**]	  	[**]	  	[**]	  	[**]
	2012	  		  	[**]	  	[**]	  	[**]	  	[**]
	2013	  		  	[**]	  	[**]	  	[**]	  	[**]
	2014	  		  	[**]	  	[**]	  	[**]	  	[**]

  
 Page 33 

 Exhibit E - ADVA Acceptance Test Criteria for 100G Module Samples 

Adva Acceptance Tests for Acacia’s 

100G Module Samples 
  

					
		 	Title	  	Adva Acceptance Tests for Acacia’s 100G Module Samples
		 	Authors	  	Benny Mikkelsen
		 	Revision number	  	0.4.1
		 	Date	  	December 08, 2010
		 	Document Number	  	050-0020-01

 Revision History 
  

							
	 Revision
	  	 Date
	  	 Author
	  	 Changes

	0.1	  	Feb. 25, 2010	  	Benny Mikkelsen	  	Initial Draft
	0.2	  	Feb 28, 2010	  	M Givehchi	  	Additional information added
	0.3	  	March 1, 2010	  	Ruo Li	  	Additional information added
	0.4	  	Dec 3, 2010	  	Mike Crowley	  	General Revisions
	0.4.1	  	Jan 11, 2011	  	Mike Crowley	  	Incorporate Adva Specific Requirements

 Overview 
 This document
describes acceptance tests for the different types of 100G MSA module samples that Acacia is making available to Strategic Partners during product development: Mechanical Samples, Early Samples and Engineering Samples, as defined below: 

Mechanical sample: Mechanical Samples are non-functional mechanical-only samples that are provided to Strategic Partners to evaluate
mechanical considerations like size and fit on customer host cards. Please note that mechanical samples do not house the actual PCB(s), but the 168 pin Hirose connector is present to confirm mechanical fit. 

Early Sample: Early Samples have undergone cursory functional testing in Acacia’s test lab. They are provided to Strategic Partners
early in the product development phase to enable system bring-up at ambient room temperature with adequate airflow, and to provide early engineering feedback to Acacia. Complete functional testing and qualification has not been performed on Early
Samples. 
 Engineering Sample: Engineering Samples have completed functional testing. The Engineering Samples are functioning in line
with the Preliminary Product Specifications, but may contain errata. 

  
 Page 34 

 General Availability of Acacia’s 100G MSA module is achieved when the module has passed
all regulatory and safety testing in accordance with the Product Specification. 
 Samples from Acacia can be tested using Acacia’s 100G evaluation
board or with the customer’s host board. First we outline the proposed tests for Mechanical Samples and next the Early Samples. Finally, we describe the proposed acceptance tests for Engineering Samples. 

Mechanical Samples 
 As stated in Chapter 0, Mechanical
Samples are non-functional mechanical-only samples that are provided to Strategic Partners to evaluate mechanical considerations like size and fit on customer host cards. The Mechanical Sample shall meet the specification outlined in Section 4.4 of
the Advanced Product Specifications. The following acceptance tests performed by the costumer are proposed: 
 Mechanical Dimensions 

Check Length, Width and Height of the module. 

Mounting Holes 
 Check dimensions, alignment and
host card fit of mounting holes. 
 168 Pin Connector 

Check attachment to the 168 pin Hirose connector. 

Location of Fiber Boots 
 Check fiber exit boots
for host card clearance and fiber routing. 
 Fiber Pigtails 

Check fiber pigtail characteristics. 
 Optical
Connectors 
 Check optical connector characteristics. 

Early Samples 
 As stated in Chapter 0, Early Samples have
undergone cursory functional tests in Acacia’s test lab. They are provided to Strategic Partners early in the product development phase to enable system bring-up at ambient room temperature with adequate airflow, and to provide early
engineering feedback to Acacia. Complete functional testing and qualification has not been performed on the Early Samples. 

  
 Page 35 

 Since full functional tests have not been completed, Acacia cannot assure that Early Samples meet all
specifications defined in Acacia’s Advanced Product Specification. For this reason there are no strict acceptance tests for Early Samples. However, Acacia assures Early Samples are functional and will transmit and receive data. A set of
proposed tests for Early Samples are given below: 
 Mechanical Design 

Mechanical Dimensions 
 Record mechanical
dimensions. 
 Module to Host Card Mating and Assembly 

Check host card mating and attachment to assure compatibility. 

Heat Sink Dimensions and Host Card Fit 

Check heat sink fit with host card. 
 Optical
Fibers and Interconnect 
 Check optical fiber exit and routing for host card placement. 

Power 
 Power Consumption 

Record module power consumption at room temperature. 

Firmware 
 Firmware should meet minimum requirement for the
normal operation of the module. 
 Firmware/Hardware Revision 

Check firmware and hardware revision information. 

Module Upgrade 
 Check module firmware
upgrade function. 
 MDIO Communication 
 Basic MDIO
communication should function properly for the early sample. 
 Basic Read and Write Operation 

  
 Page 36 

 Check the ability to read and write to module’s diagnostics registers. 

OIF Compliant Registers (Generic Registers) 

Check the ability to read and write to OIF module registers. 

Acacia Specific Registers 
 Check the
ability to read and write to Acacia specific module registers. 
 a. Set up and control registers are functional (On, Off, PRBS insert,
Frequency Tune). 
 b. Restarts return registers back to the factory state, 

Module Electrical Interfaces 
 Most of the module’s
electrical Interfaces can be verified for early samples, such as: 
 Electrical Signals 

Check low speed electrical signals. 
 MDIO Bus

 Check MDIO bus operation. 
 Resets

 Check function of resets. 
 Check
PRBS Insertion and Detection 
 Check PRBS insertion and detection functionality. 

Transmitter Tests 
 Tx Output Power 

Record Tx output power at room temperature. 

Acacia will test the module for Tx Power over temperature without the ASIC and will make results of these tests available to Adva. 

Tx Wavelength 
 Check Tx tuning to 50GHz
ITU grid, 

  
 Page 37 

 Acacia will test the module for Tx Tuning over temperature without the ASIC and will make results
of these tests available to Adva. 
 Receiver Tests 
 Back
to Back OSNR vs. BER over OTU4 Interface 
 Record Back to Back OSNR vs, BER at room temperature. 

PMD/CD Tolerance 
  

	 	a)	Record tolerance to change in SOP. 

  

	 	b)	Record PMD tolerance. 

  

	 	c)	Record dispersion tolerance. 

 Documentation / Support Provided by Acacia 

 

	 	a)	A description showing all register default values. 

  

	 	b)	Test report for all parameters tested prior to shipment. 

  

	 	c)	Module firmware updates provided when available. 

  

	 	d)	SW Emulation / HW Evaluation Platform firmware updates provided when available. 

 Engineering Samples

 As stated in Chapter 0, Engineering Samples have completed functional testing. Engineering Samples arc functioning in line with the Preliminary
Product Specifications, but may contain errata. Engineering Samples can be tested using Acacia’s 100G evaluation board or on customer host boards. Preliminary Product Specifications will be issued after Acacia has completed functional testing
of the Engineering Samples. The following items are proposed acceptance tests to be performed by Acacia’s costumers: 
 Transmitter Test: 

Tx Output Power 
 [**] 

Tx Wavelength 
 [**] 

Setup Time 
 [**] 

Transmitter Quality 

  
 Page 38 

 [**] 

Back to Back OSNR Threshold over OTU4 Interface 
 [**]

 OSNR Sensitivity 
 [**] 

PMD Tolerance 
 [**] 

PDL Tolerance 
 [**] 

Tolerance to Change in SOP 
 [**] 

Dispersion Tolerance 
 [**] 

Transient Tolerance 
 [**] 

Setup Time 
 [**] 

Clock Recovery Threshold 
 [**] 

Input Power Reporting 
 [**] 

FEC Statistics Reports 
 [**] 

PRBS Insertion and Detection 

  
 Page 39 

 [**] 

Mechanical Dimensions 
 [**] 

Module to Host Card Mating and Assembly 
 [**]

 Heat Sink Assembly 
 [**] 

Optical Fibers and Interconnect 
 [**] 

Labels and other Visual Requirements 
 [**] 

+ 12V Supply 
 [**] 

Supply Ripple Measurements 
 [**] 

Power Consumption 
 [**] 

Firmware/Hardware Revision 
 [**] 

Module Upgrade 
 [**] 

Basic Read and Write Operation 
 [**] 

OIF Compliant Registers (Generic Registers) 

  
 Page 40 

 [**] 

Acacia Specific Registers 
 [**] 

[**] 
 Electrical Signals 

[**] 
 MDIO Bus 

[**] 
 Status/Control Pins 

[**] 
 Resets 

[**] 
 Transmit Interface 

[**] 
 Receive Interface 

[**] 

  
 Page 41 

 General Availability (G.A.) 

The G.A. module should meet all Acacia Final Product Specifications. The test and acceptance procedures can follow Acacia’s internal module DVT test and
verification plan. This document will be provided to customers as a separate document with detailed test plans. 

  
 Page 42 

 Amendment No. 1 

To 
 Strategic
Partnering Agreement 
 This amendment entered into as of the 1st day of July 2013 (the “Amendment”), amends the Strategic Partnering
Agreement, effective as of 8 March 2011 (“Agreement”), by and between Acacia Communications, Inc., with a place of business at Three Clock Tower Place, Suite 130, Maynard, MA 01754, USA (“Acacia”) and ADVA Optical Networking
North America, Inc., with a place of business at 5755 Peachtree Industrial Boulevard, Norcross, GA 30096, USA (“ADVA”), collectively the Parties. 

WHEREAS, the parties have entered into the Agreement and desire to amend the Agreement as specified below; 

NOW, THEREFORE, in consideration of the terms and conditions set forth herein and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the Parties hereto agree as follows: 
  

	1.	Amendment 

  

	1.1	Section 1 of the Agreement shall be amended by adding the following subsection: 

“Affiliates” means any company which is owned or controlled directly or indirectly by a Party hereto as to fifty percent (50 %) or
more of the issued share capital and/or voting rights or which owns or controls directly or indirectly a Party hereto by fifty percent (50 %) or more of the issued share capital and/or voting rights. Insofar, the terms Acacia and ADVA under this
Agreement shall apply to and cover their respective Affiliates as well. 
  

	1.2	Subsection 4.1 of the Agreement shall be deleted in its entirety and the following shall be inserted in lieu thereof: 

4.1 Scope. From the Effective Date this Agreement shall govern the non-exclusive purchase and sale of Products between the Parties and
the license of certain associated Software provided by Acacia to ADVA. Any default or breach of any of the provisions of this Agreement by any of the Parties’ respective Affiliates shall be deemed to be a default of the respective Party and the
Parties agree to be fully liable for the acts and omissions of their Affiliates. 
 Acacia further agrees to provide Products to ADVA’s
contract manufacturers under the same terms and conditions, including prices, as agreed between Acacia and ADVA in this Agreement, but solely for resale by such contract manufacturers to ADVA. 

  

			
	Amendment No. 1 to Strategic Partnering Agreement	  	Page 1 of 4

	1.3	Subsection 4.3.4 of the Agreement shall be deleted in its entirety and the following shall be inserted in lieu thereof: 

4.3.4 Acceptance of Purchase Order. Acacia shall accept and acknowledge in writing all Purchase Orders submitted by ADVA within [**]
business days after receipt thereof. If such notification is not received by ADVA within this time the Purchase Orders are deemed accepted. Acacia may only reject a Purchase Order within this period if it is not in conformance with the terms and
conditions of the Agreement or if Acacia submits a sufficiently documented supply chain interruption resulting in Lead Time increases that also affect other customers of Acacia for the same or similar components or products. 

In the event Acacia is not able to meet the Delivery Date or quantities stated on the Purchase Order, Acacia shall notify ADVA within the [**]
business days period of the cause of the delay, measures proposed or taken to prevent or minimize the delay as well as the timetable for implementing such measures, and provide a new Delivery Date which shall not exceed the contractually agreed Lead
Time plus another [**] days, unless there is a documented supply chain disruption or force majeure condition in which case, if not otherwise mutually agreed between the Parties in writing, the new Delivery Date shall not exceed the contractually
agreed Lead Time plus another [**] days after the supply chain disruption or force majeure condition has ended. 
  

	1.4	Section 4 of the Agreement shall be amended by adding the following subsection: 

4.3.11 Last Time Buy. 
  

	 	(a)	Upon notification by Acacia to not renew the Agreement pursuant to Section 9.1, ADVA shall have the right to, within [**] months from the last day on which Acacia may submit such notification prior to the then
current term (“Last Time Buy Order Period”), place Last Time Buy Purchase Orders (“Last Time Buy Orders”) with Acacia for Products at the then existing contract prices, lead times, and other delivery obligations. Acacia will
accept such Last Time Buy Orders. ADVA may place Last Time Buy Orders if at the time of placing the order a documented supply chain disruption or force majeure event exists with the understanding that the delivery will be limited or delayed due to
such conditions pursuant to section 4.3.4. 

  

	 	(b)	ADVA shall place Last Time Buy Orders with a Delivery Date not to exceed [**] months from the ending date of the Last Time Buy Order Period. If during the Last Time Buy Order Period a documented supply chain disruption
or force majeure condition occurs the Last Time Buy Order Period shall be extended by the time during which the disruption or condition prevents the delivery of ordered Products. 

 

	 	(c)	 In the event Acacia does not fulfill accepted or deemed accepted Last Time Buy Orders, then Acacia shall transfer to ADVA those portions of
Acacia’s Intellectual Property for Products which ADVA has procured from Acacia, up to and including the date where Last Time Buy Orders were not fulfilled, as long as ADVA becomes and then remains a beneficiary of the escrow agreement between
Acacia and Iron Mountain. The escrow deposit materials contained in the escrow agreement shall provide all information and rights necessary to manufacture or have manufactured the Products to ensure that ADVA gets continued supply of the Products
during the [**] month Last Time Buy Order Period plus the additional [**] month delivery 

  

			
	Amendment No. 1 to Strategic Partnering Agreement	  	Page 2 of 4

	 	
period as defined in section 4.3.11 or until Acacia is willing and able to resume manufacturing Products for ADVA, which shall be determined at ADVA’s reasonable and good faith discretion
and in accordance with Acacia’s prior supply obligations under this Agreement. In connection with such transfer of Acacia’s Intellectual Property, Acacia shall and hereby grants ADVA a limited, non-exclusive license to such Intellectual
Property for the sole purpose of enabling ADVA to make or have made the Products. Such license will contain no rights to make derivative products. The transfer of the Intellectual Property for the above specified period shall be guaranteed by the
escrow agreement between Acacia and Iron Mountain. The Parties undertake to jointly work on the implementation of the beneficiary sign on and to provide the details of the escrow deposit materials and the Acacia processes to provide required
deposited materials updates. 

 At its own costs, ADVA may, as beneficiary to the escrow agreement, request a level 2 escrow
verification service from the escrow agent, Iron Mountain, which validates whether the relevant Products can be recreated from the documentation and files supplied in the escrow deposit, and provides the results and a complete list of the archived
deposit materials to ADVA in order to allow ADVA to verify the archive for completeness and usability. Acacia shall remediate any discrepancies discovered by escrow agent or ADVA within [**] days after having been notified thereof and confirm in
writing to ADVA at the end of this period that the discrepancies have been remediated. 
  

	 	(d)	For clarification purposes, the rights set forth in section 4.3.11 are independent from and in addition to the rights in section 4.3.10. Further, the events set forth in section 4.3.11 (a) shall not constitute a
cancellation of open Purchase Orders nor shall they relieve Acacia from its obligation to immediately deliver to ADVA any Products owed under any Purchase Order made by ADVA, or in transit, prior to the receipt of the notification.

  

	 	(e)	For all Product units subject to Last Time Buy Orders the terms and conditions of the Agreement shall be deemed fully applicable and enforceable, as if the Agreement were still in place, in spite of the Products being
ordered or delivered after the expiration or termination of the Agreement. 

  

	1.5	Subsection 9.1 of the Agreement shall be deleted in its entirety and the following shall be inserted in lieu thereof: 

9.1 Term. This Agreement shall commence on the initial Effective Date of March 8, 2011 and continue in effect for an Initial Term
of five (5) years (“Initial Term”). Unless terminated earlier as permitted herein, this Agreement will be extended automatically by additional terms of one (1) year at the end of the Initial Term and each renewal term. However,
either party may elect not to renew this Agreement by giving written notice thereof to the other party at least six (6) months prior to the end of the then current term. The parties shall meet within one (1) month of the written notice if a
party intends not to renew the term, so that detailed planning for Last Time Buy Orders can be coordinated according to 4.3.11 requirements. 

  

			
	Amendment No. 1 to Strategic Partnering Agreement	  	Page 3 of 4

	1.6	Subsection 9.4.3 of the Agreement shall be deleted in its entirety and the following shall be inserted in lieu thereof: 

9.4.3 Upon any expiration or termination of this Agreement for any reasons all rights and obligations of the parties hereunder shall cease
including payment for any deliverables not already accepted by ADVA according to the Milestone Acceptance provisions of this Agreement. In any case the following shall survive: (a) payment obligations only for generally available products (does
not apply to products still under development); (b) all remedies for breach of this Agreement; and (c) the provisions of Section 4.3.11 (Last Time Buy) unless ADVA is in material breach of this Agreement, 4.6 (RMA Procedure), 5
(Representations and Warranties), 6 (Intellectual Property), 7 (Confidentiality), 8 (Indemnity), 10 (Limitations of Liability), 11 (Miscellaneous) and this Section 9. Additionally, Acacia shall continue to provide warranty support as set forth
above and any agreed maintenance support as required in 4.3.10 (Continued Availability, Product Support and Sparing). 
  

	2.	Miscellaneous 

  

	2.1	Definitions. Each initially capitalized term used herein without definition shall have the meaning ascribed to it such term in the Agreement. 

 

	2.2	Full Force of the Agreement. Except as expressly modified or amended by the terms of this Amendment, the Agreement and all provisions contained therein are, and shall continue to be, in full force and effect and shall
henceforth, apply to this Amendment. 

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed and delivered by
their proper and duly authorized officers. 
  

									
	ADVA Optical Networking North America, Inc.	 		 	Acacia Communications, Inc.
					
	Date:	 	 7/25/2013
	 		 	Date:	 	 7/23/2013

	Signature:	 	 /s/ Scott Grindstaff
	 		 	Signature:	 	 /s/ Raj Shanmugaraj

	By:	 	 Scott Grindstaff
	 		 	By:	 	 Raj Shanmugaraj

	Title:	 	 Sr. Mgr. Strategic Procurement
	 		 	Title:	 	 President & CEO

	Signature:	 	 /s/ Michael Wei
	 		 		 	
	By:	 	 Michael Wei
	 		 		 	
	Title:	 	 VP Global Strategic Procurement
	 		 		 	

  

			
	Amendment No. 1 to Strategic Partnering Agreement	  	Page 4 of 4

 Amendment No.2 

To 
 Strategic
Partnering Agreement 
 This amendment’ entered into as of the 1st day of August 2013 (the “Amendment”), amends the Strategic Partnering
Agreement, effective as of 8 March 2011 (“Agreement”), by and between Acacia Communications, Inc., with a place of business at Three Clock Tower Place, Suite 130, Maynard, MA 01754, USA (“Acacia”) and ADVA Optical Networking
North America, Inc., with a place of business at 5755 Peachtree Industrial Boulevard, Norcross, GA 30096, USA (“ADVA”), collectively the Parties. 

WHEREAS, the Parties have entered into the Agreement and desire to amend the Agreement for the following versions of Acacia’s
AC100 100G coherent optical! module: the 100G Coherent CFP, the 100G Coherent AC100LH MSA, and the 100G Coherent AC100LH MSA-SiPH (AC100LH with Silicon Photonics based PIC), as specified below; 

NOW, THEREFORE, in consideration of the terms and conditions set forth herein and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the Parties hereto agree as follows: 
  

	1.	Scope 

  

	1.1	General. This Amendment shall only apply to development, purchase, and sale of the following versions of Acacia’s 100G coherent optical modules: the 100G Coherent CFP, the 100G Coherent AC100LH MSA a
product already developed and integrated into ADVA products and having conditional purchase commitments as part of this Amendment, and the 100G Coherent AC100LH MSA-SiPH (AC100LH with Silicon Photonics based PIC), any and all of which are hereafter
referred to as the “Product Versions”. 

  

	1.2	Activities. All Purchase Orders and other commercial activities resulting from this Amendment shall be governed by the Agreement unless otherwise defined herein. 

 

	2.	Terms for Product Versions 

  

	2.1	Time-to-Market Timeline. The Parties will collaborate to ensure a successful integration of the Product Versions into ADVA’s system according to the agreed time-to-market timeline shown below:

  
 

 

  

			
	Amendment No. 2 to Strategic Partnering Agreement	  	Page 1 of 10

	2.2	Acacia Deliverables. Acacia agrees to 

  

	 	(a)	Work with ADVA to ensure optimized performance in ADVA’s applications and, specifically, to solve any thermal issues. Should any Product Version enhancements be required the Parties will mutually agree on the
actions required and such enhancements should have no impact on the agreed prices in this Amendment. 

  

	 	(b)	Deliver various simulations, mechanical, thermal, electrical, and make best efforts to supply software models in data formats which are useful to ADVA. 

 

	 	(c)	Provide ADVA access to test data resulting from Design Verification Testing (DVT). 

  

	 	(d)	Provide ADVA access to qualification test data resulting from GR468 Telcordia qualification. 

  

	 	(e)	Host regular engineering updates for reviewing progress against agreed to milestones. 

  

	 	(f)	[**]. 

  

	 	(g)	Assist ADVA to respond to carrier RFIs/RFP’s. 

  

	 	(h)	Share Acacia product roadmap plans. 

 [**] 

These deliverables combined with special technical support and services are provided to Strategic Partners well ahead of other customers to
enable a [**] month time to market advantage. 

  

			
	Amendment No. 2 to Strategic Partnering Agreement	  	Page 2 of 10

	2.3	ADVA Deliverables. ADVA agrees to 

  

	 	(a)	Review advanced product specifications and provide timely technical feedback to ensure Acacia’s Product Versions meet ADVA’s system requirements. 

 

	 	(b)	Evaluate Hot Samples and Engineering Samples (“Pre-Production Units”), providing test results in a timely manner. 

  

	 	(c)	Use best efforts to provide non-binding Product Versions volume production forecasts in support of Acacia’s capacity planning. 

  

	 	(d)	Commit to order [**] Pre-Production Units comprised of [**] Hot Sample units to satisfy design FW/HW testing compliant with Acacia’s Advanced Product Specification at room temperature and [**] Engineering Sample
units compliant with Acacia’s Preliminary Product Specification. ADVA has the discretion to take delivery of the [**] Engineering Samples under waiver if the sample units do not meet Acacia’s Preliminary Product Specification, or RMA the
product back to Acacia for repair/replacement. 

  

	 	(e)	Commit to purchase [**]% of all 100G Coherent ports for 2013 and 2014. The purchase share commitment is increased to [**]% of ADVA’s 100G Coherent CFP requirements for year 2014 only. 

 

	 	(f)	In the event ADVA has to engage a customer requiring interoperability (and interoperability is the only factor limiting the sale) with a device that is not interoperable with Acacia, ADVA will give timely notice to
Acacia and provide Acacia the opportunity to become interoperable or Acacia may forego the opportunity. The maximum time allowed for Acacia to offer an interoperable solution shall be determined by ADVA based on time-to-market considerations. ADVA
shall also determine if an Acacia’s proposed solution is deemed interoperable. 

  

	 	(g)	[**]. 

  

	2.4	Termination and Schedule Changes. This Amendment may be terminated by either Party without penalty prior to a mutual agreement on product performance specifications and the subsequent placement of Purchase
Orders by ADVA. Once Pre-Production Units Purchase Orders are placed by ADVA, changes to, or termination of this Amendment shall be done via a thirty (30) day written notice to the other Party and shall be according to one of the following
cases: 

  

	 	(a)	Failure to meet product specification - In the unlikely event that Acacia can’t deliver Product Versions to the agreed upon specification, either Preliminary Product Specification or Final Production Specification,
within 16 weeks past the respective committed Schedule dates in Exhibit B, Acacia agrees to allow ADVA to terminate the Amendment upon ADVA’s written termination request. Acacia will credit ADVA for undamaged Pre-Production Units shipped upon
their return and review under the RMA process. Any purchase obligations will be canceled when the Amendment is terminated. 

  

			
	Amendment No. 2 to Strategic Partnering Agreement	  	Page 3 of 10

	 	(b)	Schedule changes by Acacia - Should Acacia 100G Coherent CFP or AC100LH SiPH be delayed from the Schedule Dates listed in Exhibit-B, Acacia shall notify ADVA in writing. ADVA shall have the discretion to pursue one of
the following options based on the impact of the delay: 

  

	 	i.	Cancel the portion of the Amendment for the 100G Coherent CFP if Acacia is more than [**] late delivering Engineering Samples or GA production grade units; Acacia will credit ADVA for undamaged Pre-Production Units
shipped upon their return and review under the RMA process. 

  

	 	ii.	Cancel the portion of the Amendment for the 100G Coherent MSA-SiPH including purchase share commitments for AC100LH if Acacia is more than [**] late delivering Engineering Samples or GA production grade units; Acacia
will credit ADVA for undamaged Pre-Production Units shipped upon their return and review under the RMA process. 

  

	 	iii.	Assign the following consequences to the delayed Product Version and continue the Amendment: 

  

	 	1.	100G Coherent CFP - if Acacia’s delivery dates for Engineering Samples (ES) or GA Production Sample Availability Date are more than 6 weeks late from the Schedule Dates listed in Exhibit-B, ADVA may reduce
the purchase share commitment, for the term of this Amendment, on the 100G Coherent CFP accordingly: 

  

	 	•	 	>[**] delayed from ES or GA Date - Reduce purchase share commitment from [**]% to [**]%; 

  

	 	•	 	>[**] delayed from ES or GA Date - Reduce purchase share commitment from [**]% to [**]%; 

  

	 	•	 	>[**] delayed from ES or GA Date - Reduce purchase share commitment from [**]% to [**]%. 

  

	 	2.	AC100 LH SIPH - if Acacia’s delivery of General Availability (GA) units is delayed 

  

	 	•	 	beyond [**], the Q3CY14 AC100LH price shall be reduced to $[**] USD each; 

  

	 	•	 	beyond [**], the Q3CY14 AC100LH price shall be $[**] USD each; 

  

	 	•	 	[**] if GA on or before [**]. 

  

	 	3.	In addition to the above price reductions, section 2.4.(b)(iii)(2), ADVA may reduce its purchase share commitment for the AC100LH w/SiPH and the AC100LH from [**]% to [**]% if GA is not declared by Acacia on or before
[**]. 

  

			
	Amendment No. 2 to Strategic Partnering Agreement	  	Page 4 of 10

	 	(c)	Termination by ADVA - After ADVA’s placement of Purchase Orders for Pre-Production Units, should ADVA terminate this Amendment without cause Acacia may deliver the [**] Pre-Production Units and accept payment from
ADVA according to the agreed payment terms in the Agreement. Alternately ADVA and Acacia may agree on a cash payment to Acacia equal to [**]% of the undelivered Purchase Order(s) amount up to [**] Pre-Production Units and further delivery of
Products to ADVA is not required. 

  

	 	(d)	Termination by Acacia - In the case Acacia wants to terminate this Amendment then ADVA may cancel all undelivered Pre-Production units without payment or penalty. Acacia shall credit the full purchase price for any
Pre-Production Products already delivered to ADVA, following receipt and review of the Products under an RMA. 

  

	3.	Miscellaneous 

  

	3.1	Definitions. Each initially capitalized term used herein without definition shall have the meaning ascribed to it such term in the Agreement. 

 

	3.2	Full Force of the Agreement. Except as expressly modified or amended by the terms of this Amendment, the Agreement and all provisions contained therein are, and shall continue to be, in full force and
effect and shall henceforth, apply to this Amendment. 

  

	3.3	Exhibits. This Amendment is supplemented by the following exhibits which which shall be deemed to be an integral part of this Amendment: 

 

	 	•	 	Exhibit A - High level Product specifications for 100G Coherent CFP 

  

	 	•	 	Exhibit B - Milestone-based Product development schedule for the 100G Coherent CFP 

  

	 	•	 	Exhibit C - Strategic Partner Price Matrix for 100G Coherent CFP 

  

	 	•	 	Exhibit D - Strategic Partner Price Matrix for 100G AC100LH and AC100LH SiPH 

  

			
	Amendment No. 2 to Strategic Partnering Agreement	  	Page 5 of 10

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed and delivered by their
proper and duly authorized officers as of the day and year first above written. 
  

									
	ADVA Optical Networking North America, Inc.	 		 	Acacia Communications, Inc.
					
	Date:	 	 8/9/2013
	 		 	Date:	 	 8/5/2013

	Signature:	 	 /s/ Ryan Schmidt
	 		 	Signature:	 	 /s/ Raj Shanmugaraj

	By:	 	 Ryan Schmidt
	 		 	By:	 	 Raj Shanmugaraj

	Title:	 	 VP R&D WDM
	 		 	Title:	 	 President & CEO

	Date:	 	 9th August 2013
	 		 		 	
	Signature:	 	 /s/ Christoph Glingener
	 		 		 	
	By:	 	 Christoph Clingener
	 		 		 	
	Title:	 	 CTO
	 		 		 	

  

			
	Amendment No. 2 to Strategic Partnering Agreement	  	Page 6 of 10

 Exhibit A – 100G Coherent CFP target specifications 

 

			
	 100G Coherent CFP

	 Parameter
	 	 Specification

	Data Rate	 	[**]
	Modulation Format	 	[**]
	Client interface	 	[**]
	Form Factor	 	[**]
	Power Consumption	 	[**]
	Reach	 	[**]
	Transmitter	 	[**]
	Channel Spacing	 	[**]
	Output Power	 	[**]
	Receiver Sensitivity	 	[**]
	OSNR Sensitivity	 	[**]
	PMD Tolerance	 	[**]
	CD Tolerance	 	[**]
	Latency	 	[**]

  

			
	Amendment No. 2 to Strategic Partnering Agreement	  	Page 7 of 10

 Exhibit B – 100G Milestone Schedule 

 

					
	 100G Coherent CFP Program Milestones
	  	 Schedule Date
	  	 NRE (k$)

	Thermal models (FloTHERM)	  	[**]	  	N/A
	Advanced Product Specifications	  	[**]	  	N/A
	Deliver Hot Samples (HS)	  	[**]	  	N/A
	Preliminary Product Specification	  	[**]	  	N/A
	Deliver Engineering Samples (ES)	  	[**]	  	N/A
	Final Product Specification	  	[**]	  	N/A
	GA production samples available	  	[**]	  	N/A
		  	[**]	  	$0K

  

			
	 AC100LH w/SIPH Program Milestones
	  	 Schedule Date

	Advanced Product Specifications	  	[**]
	Deliver Hot Samples (HS)	  	[**]
	Preliminary Product Specification	  	[**]
	Deliver Engineering Samples (ES)	  	[**]
	Final Product Specification	  	[**]
	GA production samples available	  	[**]

 Note: Schedule based on PIC qualification and ADVA/Acacia mutually agree on specification 

[**]. 

  

			
	Amendment No. 2 to Strategic Partnering Agreement	  	Page 8 of 10

 Exhibit C – 100G Coherent CFP Strategic Partner Budgetary Pricing 

 

									
	 100G Coherent CFP – Strategic Partner Pricing

	 	  	 	  	 [**]

	 Product
	  	 	  	 Pre-prod.
	  	 1H CY
	  	 2H CY

	AC100-M	  		  	[**]	  	[**]	  	[**]
	 Notes:
	  	Pre-production = anything shipped prior to GA
	  	Price is based on ship date

  

							
	 100G Coherent CFP ramp plan

	Delivery Date	  	[**]	  	[**]	  	[**]
	Product status	  	[**]	  	[**]	  	[**]
	Specification	  	[**]	  	[**]	  	[**]
	Quantity	  	[**]	  	[**]	  	[**]
	Price	  	[**]	  	[**]	  	[**]
	Warrant	  	[**]	  	[**]	  	[**]

 Note: Lead time for GA product is [**], Pre-GA is [**] 

  

			
	Amendment No. 2 to Strategic Partnering Agreement	  	Page 9 of 10

 Exhibit D – 100G Coherent AC100LH Strategic Partner Budgetary Pricing 

 

											
	 100G Coherent L HMSA – Strategic Partner Pricing

	 	  	 2H-2013
	  	 1H-2014
	  	 2H-2014

	 	  	 Q3CY13
	  	 Q4CY13*
	  	 Q1CY14
	  	 Q2CY14
	  
	AC100-LH	  	[**]	  	[**]	  	[**]	  	[**]	  	[**]
	AC100-LH SIP	  		  		  	[**]	  	[**]	  	[**]

 Notes: 
  

	 	•	 	[**] price is approved for all new orders placed after [**] 

  

	 	•	 	SiP or SIPH indicates Silicon Photonics integrated optical circuit for transmit and receive optics. 

  

	 	•	 	100G Coherent AC100LH w/SiPH, Pre-Production Units will be shipped at $[**] 

  

			
	Amendment No. 2 to Strategic Partnering Agreement	  	Page 10 of 10

 Amendment No.3 

To 
 Strategic
Partnering Agreement 
 This amendment, entered into as of the 7th day of March 2014 (the “Amendment”) amends the Strategic Partnering
Agreement (the “Agreement”) by and between Acacia Communications, Inc., with a place of business at Three Clock Tower Place, Suite 130, Maynard, MA 01754, USA (“Acacia”) and ADVA Optical Networking North America, Inc., with a
place of business at 5755 Peachtree Industrial Boulevard, Norcross, GA 30096, USA (“ADVA”), collectively the Parties. 

WHEREAS, the Parties have entered into the Agreement and desire to amend the Agreement for the following versions of Acacia’s
[**], marketed by Acacia as “Denair, as specified below; 
 NOW, THEREFORE, in consideration of the terms and conditions set
forth herein and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties hereto agree as follows: 
  

	1.	Scope 

  

	1.1	General. This Amendment applies to the development, purchase, and sale of the [**] into [**]. 

  

	1.2	Activities. Ail Purchase Orders and other commercial activities resulting from this Amendment shall be governed by the Agreement unless otherwise defined herein. 

 

	2.	Definitions and Terms 

  

	2.1	Definitions 

  

	 	(a)	“Advanced Product Specification” - Acacia’s committed specification regarding base line performance for the final production release of the [**]. 

 

	 	(b)	“Preliminary Product Specification” - [**] product specification which possibly includes improvements or new features to the Advanced Product Specification at the time of tape out when the design is complete
and sent to the foundry for fabrication. For purposes of this Amendment the product performance improvements and/or new features must not reduce or otherwise impede product performance as defined in the mutually agreed Advanced Product Specification
unless agreed in writing by ADVA 

  

	 	(c)	“Final Product Specification” - A mutually agreed detailed [**] product specification for the production released version of [**]. The Final Product Specification is warranted. For purposes of this Amendment
the product performance improvements and/or new features must not reduce or otherwise impede product performance as defined in the mutually agreed Advanced Product Specification unless agreed in writing by ADVA. 

  
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#             Amendment #3 to ADVA-Acacia Strategic Partnering Agreement 
 Page 1 of 7 

	 	(d)	“Pre-Production Unit” - Engineering samples of Acacia [**] which are compliant to the Preliminary Product Specification but having not been fully qualified according to industry standard methods as defined in
the Preliminary or Final Product Specifications. 

  

	 	(e)	“Production Unit” - [**] having a design which has successfully passed all specified qualification tests and declared by Acacia to be fully released to production, warranted, and compliant to the Final Product
Specification. Production Units are also commonly referred as “GA Units”. 

  

	 	(f)	AC400-T Module - Acacia optical transceiver product based on the [**]. This module is fully integrated with optics, control, and communications circuitry. For purposes of this Amendment it may be purchased by ADVA to
establish baseline performance capabilities of the [**]. 

  

	2.2	Time-to-Market Timeline. The Parties will collaborate to ensure a successful integration of the [**] into ADVA’s system according to the agreed time-to-market timeline shown below: 

 
 

 
  

	2.3	Acacia Deliverables. Acacia agrees to: 

  

	 	(a)	Consider certain ADVA requirements to be designed into the product (nonexclusive) so long as they do not add excessive risk, schedule and cost to the program. 

 

	 	(b)	Provide [**], if requested by ADVA, as well as the associated evaluation board (EVB) at mutually agreed prices. 

  

	 	(c)	Provide Advanced, Preliminary and Final Product Specifications. 

  

	 	(d)	Provide Pre-Production Units of [**] as specified in 2.4. 

  

	 	(e)	Provide design consultation and reference designs for [**] solution. 

  

	 	(f)	Provide Acacia’s standard API (Application Programming Interface) software and associated technical support for the [**] for purposes of configuring the device to integrate in ADVA’s system. 

 

	 	(g)	Deliver, as needed, various simulations and [**] test results regarding: mechanical, thermal, electrical, and optical performance. 

  

	 	(h)	Provide ADVA access to qualification test data resulting from [**] component qualification tests. 

  

	 	(i)	Host regular engineering updates with ADVA for reviewing progress against agreed milestones. 

[**] 
 The Acacia deliverables,
combined with special technical support and services, are provided to ADVA and other “Strategic Partners” well ahead of other customers. 
  

	2.4	ADVA Deliverables. ADVA agrees to: 

  

	 	(a)	Use the Acacia [**] in [**] of Adva’s [**] customer applications in [**] and [**] at the agreed upon price. 

  

	 	(b)	Good faith [**] to negotiate with Acacia by [**] a future Strategic Partnering Amendment for Acacia’s [**] for inclusion into ADVA’s design for the [**]. Failure to reach such agreement regarding the [**]
shall not result in changes to this Amendment #3. 

  

	 	(c)	ADVA will purchase and take delivery of [**] samples at unit price USD [**]. 

  

	 	(d)	ADVA will purchase and take delivery of [**], fully qualified, released to production [**] at unit price [**]. 

  

	 	(e)	ADVA has the option to purchase [**] (including a [**]) at price [**]. 

  

	 	(f)	Once qualified, ADVA will add the new [**] part number to the current Strategic Partnering Agreement’s list of approved products. 

 

	2.5	Termination and schedule delays,. Approval of this Amendment by both Parties signifies that the Advanced Product Specification in Exhibit-A is mutually agreed in writing. Changes to, or termination of,
this Amendment shall be done via a thirty (30) day written notice to the other Party and shall be according to one of the following cases: 

  

	 	(a)	 Termination for cause: Acacia’s failure to meet product specification. In the unlikely event that within eight (8) weeks past the
respective committed scheduled product Delivery Dates shown in Exhibit-B: (i) Acacia can’t deliver [**] to 

  
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#             Amendment #3 to ADVA-Acacia Strategic Partnering Agreement 
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the agreed upon specification, be it either Pre-Production Unit samples in compliance to the Advanced or Preliminary Product Specifications or Production Units in compliance to the Final
Production Specification, or (ii) Acacia’s Preliminary or Final Product Specifications are not supporting the performance and/or features as described in the mutually agreed Advanced Product Specification and ADVA has does not accept the
Acacia proposed changes to these Specifications, then in either such case Acacia agrees to allow ADVA to terminate the Amendment without penalty. Any remaining purchase obligations including undelivered [**] samples or Production Units may, at
ADVA’s sole discretion, be canceled free of penalty upon termination of this Amendment. 

  

	 	(b)	Termination for cause; Acacia’s schedule delays. As soon as Acacia knows or reasonably believes the [**] Production Unit Release Date (GA), [**] Tapeout, or [**] Sample Delivery to ADVA milestones be delayed
by more than eight (8) weeks from the Schedule date listed in Exhibit-B, Acacia shall notify ADVA in writing. ADVA shall have the discretion to pursue one of the following options based on the impact of the delay. 

 

	 	i.	Cancel this Amendment via written notification and, at its sole discretion, immediately cancel any remaining purchase obligations as required by this Amendment and/or open Purchase Orders for the [**], free of penalty,
including undelivered [**] samples. 

  

	 	ii.	Choose to not cancel this Amendment, but instead mutually agree with Acacia on lower production prices for the 2015 and 2016 calendar years as partial compensation for delaying ADVA’s time to market with the 2x200G
Flexponder Line Card. 

  

	 	(c)	Termination by ADVA without cause. If ADVA terminates this Amendment without cause then Acacia may deliver all mandatory ADVA purchases listed in 2.4 c, d, e, f and g of this Amendment and accept payment from
ADVA according to the agreed payment terms in the Agreement. Alternately, ADVA and Acacia may agree on a cash payment to Acacia equal to fifty percent (50%) of the agreed price for undelivered mandatory purchase items in 2.4 and further
delivery of Products to ADVA is not required. 

  

	 	(d)	Termination by Acacia without cause. If Acacia terminates this Amendment without cause then ADVA may cancel all undelivered [**] units, be they Pre-Production or Production Units, without payment or penalty.
Furthermore, Acacia shall credit to ADVA the full purchase price for any Pre-Production or Production Units of [**]s and associated evaluation boards (EVBs) having been already delivered to and paid by ADVA. 

 

	3.	Miscellaneous 

  

	3.1	Definitions. Each initially capitalized term used herein without definition shall have the meaning ascribed to it such term in the Agreement. 

  
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#             Amendment #3 to ADVA-Acacia Strategic Partnering Agreement 
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	3.2	Full Force of the Agreement. Except as expressly modified or amended by the terms of this Amendment, the Agreement and ail provisions contained therein are, and shall continue to be, in full force and
effect and shall henceforth, apply to this Amendment. 

  

	3.3	Exhibits. This Amendment is supplemented by the following exhibits which shall be deemed to be an integral part of this Amendment: 

 

	 	•	 	Exhibit A - Denali [**] Advanced Product Specification 

  

	 	•	 	Exhibit B - Denali [**] Milestone Schedule 

  

	 	•	 	Exhibit C - Denali [**] Strategic Partner Pricing 

 IN WITNESS WHEREOF, the parties hereto have caused this
Amendment to be duly executed and delivered by their proper and duly authorized officers as of the day and year first above written. 
  

									
	ADVA Optical Networking North America, Inc.	 		 	Acacia Communications, Inc.
					
	Date:	 	 3/5/2014
	 		 	Date:	 	 3/5/2014

	Signature:	 	 /s/ Ryan Schmidt
	 		 	Signature:	 	 /s/ Raj Shanmugaraj

	By:	 	 Ryan Schmidt
	 		 	By:	 	 Raj Shanmugaraj

	Title:	 	 VP R&D WDM
	 		 	Title:	 	 President & CEO

	Date:	 	 9th August 2013
	 		 		 	
	Signature:	 	 /s/ Christoph Glingener
	 		 		 	
	By:	 	 Christoph Clingener
	 		 		 	
	Title:	 	 CTO
	 		 		 	

  
 Contract
#             Amendment #3 to ADVA-Acacia Strategic Partnering Agreement 
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 Exhibit A – Denali [**] Advanced Product Specification 

 

							
	 	 	 	 	 Denali [**] Specification

	 	 	 	 	 Parameter
	  	 Value

	[**]	 		 		  	[**]
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 Contract
#             Amendment #3 to ADVA-Acacia Strategic Partnering Agreement 
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 Exhibit B – Denali [**] Milestone Schedule 

 

					
	 Program Milestones
	  	 Date
	  	 Notes

	SIS/API Advanced Spec #1	  	[**]	  	
	Advanced ASIC Specification - Preliminary Pinout/ Floor Plan, Clocking, Power Supplies, uP & Management Interface	  	[**]	  	[**]
	ASIC_ [**] Reference Design	  	[**]	  	[**]
	SIS/API Advanced Spec #2	  	[**]	  	
	Prelimninar ASIC Specification - Final Ball Map, Power Supply / Clocking, Pin Descriptions	  	[**]	  	[**]
	Delphi Model	  	[**]	  	
	Ibis-AMI	  	[**]	  	
	5 Denali ASIC Samples	  	[**]	  	[**]
	1 Denali ASIC Eval Board if Purchased	  	[**]	  	
	[**]	  	[**]	  	[**]
	[**]	  	[**]	  	[**]
	[**]	  	[**]	  	[**]

  
 Contract
#             Amendment #3 to ADVA-Acacia Strategic Partnering Agreement 
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 Exhibit C - Denali [**] Strategic Partner Pricing 

 

									
	 	  	 Denali-ASIC Pricing
	  	 
	Period	  		  	[**]	  	[**]	  	[**]
	Pre-production	  	[**]	  		  		  	
	2015 Price	  		  	[**]	  	[**]	  	[**]
	2016 Price	  		  	[**]	  	[**]	  	[**]
	 Notes:
	  	Prototypes = combination of Hot Samples and Engineering Samples
	  	Pre-production = units shipped prior to GA

 Notes: 
 1. Prices listed are
“not to exceed” prices and may be discussed or altered at any time by mutual agreement between the Parties. 

  
 Contract
#             Amendment #3 to ADVA-Acacia Strategic Partnering Agreement 
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