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Exhibit 10.3  

STARENT NETWORKS, CORP.  

Restricted Stock Agreement
 Granted Under 2000 Stock Incentive Plan

        AGREEMENT
made this XXth day of July, 2003, between Starent Networks, Corp., a Delaware corporation (the "Company"), and NAME (the "Participant"). 

        For
valuable consideration, receipt of which is acknowledged, the parties hereto agree as follows: 

        1.    Purchase of Shares.    The Company shall issue and sell to the Participant, and the Participant shall purchase
from the Company, subject to the terms and conditions set forth in this Agreement and in the Company's 2000 Stock Incentive Plan (the "Plan"), 60,000 shares (the "Shares") of common stock, $.001 par
value, of the Company ("Common Stock"), at a purchase price of $.20 per share. The aggregate purchase price for the Shares shall be paid by the Participant by check payable to the order of the Company
or such other method as may be acceptable to the Company. Upon receipt by the Company of payment for the Shares, the Company shall issue to the Participant one or more certificates in the name of the
Participant for that number of Shares purchased by the Participant. The Participant agrees that the Shares shall be subject to the Purchase Option set forth in Sections 2 and 5 of this Agreement and
the restrictions on transfer set forth in Section 4 of this Agreement. 

        2.    Purchase Option.    

        (a)   In
the event that the Participant ceases to be employed by the Company for any reason or no reason, with or without cause, prior to XXX,
2004, the Company shall have the right and option (the
"Purchase Option") to purchase from the Participant, for a sum of $.20 per share (the "Option Price"), some or all of the Unvested Shares (as defined below). 

        (b)   "Unvested
Shares" means the total number of Shares multiplied by the Applicable Percentage at the time the Purchase Option becomes exercisable by the Company. The
"Applicable Percentage" shall be (i) 100% during the 12-month period ending XXX, 2001, (ii) 75% less 6.25% for each three
months of employment completed by the Employee with the Company from and after XXX, 2001, and (iii) zero on or after XXX,
2004. Shares that are not Unvested Shares shall be referred to as "Vested Shares." 

        (c)   For
purposes of this Agreement, employment with the Company shall include employment with a parent or subsidiary of the Company. 

        (d)   In
the event of an Acquisition (as defined below), then an additional 25% of the Shares shall become Vested Shares immediately prior to the closing of the Acquisition
and the date referred to in clause (iii) of Section 2(b) shall be accelerated by 12 months. 

        (e)   For
the purposes of this Agreement, "Acquisition" shall mean any (i) merger or consolidation which results in the voting securities of the Company outstanding
immediately prior thereto representing immediately thereafter (either by remaining outstanding or by being converted into voting securities of the surviving or acquiring entity (the "Acquiror")) less
than a majority of the combined voting power of the voting securities of the Company or the Acquiror outstanding immediately after such merger or consolidation, (ii) sale of all or
substantially all of the assets of the Company or (iii) sale of shares of capital stock of the Company, in a single transaction or series of related transactions, representing at least 80% of
the voting power of the outstanding securities of the Company. 

        3.    Exercise of Purchase Option and Closing.    

        (a)   The
Company may exercise the Purchase Option by delivering or mailing to the Participant (or his estate), within 90 days after the termination of the employment
of the 

 

Participant
with the Company, a written notice of exercise of the Purchase Option. Such notice shall specify the number of Shares to be purchased. If and to the extent the Purchase Option is not so
exercised by the giving of such a notice within such 90-day period, the Purchase Option shall automatically expire and terminate effective upon the expiration of such 90-day
period. 

        (b)   Within
10 days after delivery to the Participant of the Company's notice of the exercise of the Purchase Option pursuant to subsection (a) above, the
Participant (or his estate) shall, pursuant to the provisions of the Joint Escrow Instructions referred to in Section 7, tender to the Company at its principal offices the certificate or
certificates representing the Shares which the Company has elected to purchase in accordance with the terms of this Agreement, duly endorsed in blank or with duly endorsed stock powers attached
thereto, all in form suitable for the transfer of such Shares to the Company. Promptly following its receipt of such certificate or certificates, the Company shall pay to the Participant the aggregate
Option Price for such Shares (provided that any delay in making such payment shall not invalidate the Company's exercise of the Purchase Option with respect to such Shares). 

        (c)   After
the time at which any Shares are required to be delivered to the Company for transfer to the Company pursuant to subsection (b) above, the Company shall not
pay any dividend to the Participant on account of such Shares or permit the Participant to exercise any of the privileges or rights of a stockholder with respect to such Shares, but shall, in so far
as permitted by law, treat the Company as the owner of such Shares. 

        (d)   The
Option Price may be payable, at the option of the Company, in cancellation of all or a portion of any outstanding indebtedness of the Participant to the Company or
in cash (by check) or both. 

        (e)   The
Company shall not purchase any fraction of a Share upon exercise of the Purchase Option, and any fraction of a Share resulting from a computation made pursuant to
Section 2 of this Agreement shall be rounded to the nearest whole Share (with any one-half Share being rounded upward). 

        (f)    The
Company may assign its Purchase Option to one or more persons or entities. 

        4.    Restrictions on Transfer.    The Participant shall not sell, assign, transfer, pledge, hypothecate or otherwise
dispose of, by operation of law or otherwise (collectively "transfer"): 

        (a)   any
Shares, or any interest therein, that are subject to the Purchase Option, except that the Participant may transfer such Shares (i) to or for the benefit of
any spouse, child or grandchild of the
Participant, or to a trust for their benefit, provided that such Shares shall remain subject to this Agreement (including without limitation the
restrictions on transfer set forth in this Section 4, the Purchase Option and the right of first refusal set forth in Section 5) and such permitted transferee shall, as a condition to
such transfer, deliver to the Company a written instrument confirming that such transferee shall be bound by all of the terms and conditions of this Agreement or (ii) as part of the sale of all
or substantially all of the Shares of capital stock of the Company (including pursuant to a merger or consolidation), provided that, in accordance with
the Plan, the securities or other property received by the Participant in connection with such transaction shall remain subject to this Agreement; or 

        (b)   any
Shares, or any interest therein, that are no longer subject to the Purchase Option, except in accordance with Section 5 below. 

        5.    Right of First Refusal.    

        (a)   If
the Participant proposes to transfer any Shares that are no longer subject to the Purchase Option (either because they are no longer Unvested Shares or because the
Purchase Option expired unexercised), then the Participant shall first give written notice of the proposed 

2

 

transfer
(the "Transfer Notice") to the Company. The Transfer Notice shall name the proposed transferee and state the number of such Shares he proposes to transfer (the "Offered Shares"), the price
per share and all other material terms and conditions of the transfer. 

        (b)   For
30 days following delivery to the Company of such Transfer Notice, the Company shall have the option to purchase all (but not less than all) of the Offered
Shares at the price and upon the terms set forth in the Transfer Notice. In the event the Company elects to purchase all of the Offered Shares, it shall give written notice of such election to the
Participant within such 30-day period. Within 10 days after delivery to the Participant of such notice, the Participant shall tender to the Company at its principal offices the
certificate or certificates representing the Offered Shares, duly endorsed in blank by the Participant or with duly endorsed stock powers attached thereto, all in form suitable for transfer of the
Offered Shares to the Company. Promptly following receipt of such certificate or certificates, the Company shall deliver or mail to the Participant a check in payment of the purchase price for the
Offered Shares; provided that if the terms of payment set forth in the Transfer Notice were other than cash against delivery, the Company may pay for
the Offered Shares on the same terms and conditions as were set forth in the Transfer Notice; and provided further that any delay in making such payment
shall not invalidate the Company's exercise of its option to purchase the Offered Shares. 

        (c)   If
the Company does not elect to acquire all of the Offered Shares, the Participant may, within the 30-day period following the expiration of the option
granted to the Company under subsection (b) above, transfer the Offered Shares to the proposed transferee, provided that such transfer
shall not be on terms and conditions more favorable to the transferee than those contained in the Transfer Notice. Notwithstanding any of the above, all Offered Shares transferred pursuant to this
Section 5 shall remain subject to this Agreement (including without limitation the restrictions on transfer set forth in Section 4 and the right of first refusal set forth in this
Section 5) and such transferee shall, as a condition to such transfer, deliver to the Company a written instrument confirming that such transferee shall be bound by all of the terms and
conditions of this Agreement. 

        (d)   After
the time at which the Offered Shares are required to be delivered to the Company for transfer to the Company pursuant to subsection (b) above, the Company
shall not pay any dividend to the Participant on account of such Offered Shares or permit the Participant to exercise any of the privileges or rights of a stockholder with respect to such Shares, but
shall, in so far as permitted by law, treat the Company as the owner of such Offered Shares. 

        (e)   The
following transactions shall be exempt from the provisions of this Section 5: 

        (1)   a
transfer of Shares to or for the benefit of any spouse, child or grandchild of the Participant, or to a trust for their benefit; 

        (2)   any
transfer pursuant to an effective registration statement filed by the Company under the Securities Act of 1933, as amended (the "Securities Act"); and 

        (3)   the
sale of all or substantially all of the shares of capital stock of the Company (including pursuant to a merger or consolidation); 

provided, however, that in the case of a transfer pursuant to clause (1) above, such Shares shall
remain subject to this Agreement (including without limitation the restrictions on transfer set forth in Section 4 and the right of first refusal set forth in this Section 5) and such
transferee shall, as a condition to such transfer, deliver to the Company a written instrument confirming that such transferee shall be bound by all of the terms and conditions of this Agreement. 

        (f)    The
Company may assign its rights to purchase Offered Shares in any particular transaction under this Section 5 to one or more persons or entities. 

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        (g)   The
provisions of this Section 5 shall terminate upon the earlier of the following events: 

        (1)   the
closing of the sale of shares of Common Stock in an underwritten public offering pursuant to an effective registration statement filed by the Company under the
Securities Act; or 

        (2)   the
sale of all or substantially all of the capital stock, assets or business of the Company, by merger, consolidation, sale of assets or otherwise (other than a merger
or consolidation in which all or substantially all of the individuals and entities who were beneficial owners of the Common Stock immediately prior to such transaction beneficially own, directly or
indirectly, more than 75% of the outstanding securities entitled to vote generally in the election of directors of the resulting, surviving or acquiring corporation in such transaction). 

        (h)   The
Company shall not be required (i) to transfer on its books any of the Shares which shall have been sold or transferred in violation of any of the provisions
set forth in this Agreement, or (ii) to treat as owner of such Shares or to pay dividends to any transferee to whom any such Shares shall have been so sold or transferred. 

        6.    Agreement in Connection with Public Offering.    The Participant agrees, in connection with the initial
underwritten public offering of the Company's securities pursuant to a registration statement under the Securities Act, (i) not to sell, make short sale of, loan, grant any options for the
purchase of, or otherwise dispose of any shares of Common Stock held by the Participant (other than those shares included in the offering) without the prior written consent of the Company or the
underwriters managing such initial underwritten public offering of the Company's securities for a period of 180 days from the effective date of such registration statement, and (ii) to
execute any agreement reflecting clause (i) above as may be requested by the Company or the managing underwriters at the time of such initial offering. 

        7.    Escrow.    The Participant shall, upon the execution of this Agreement, execute Joint Escrow Instructions in the
form attached to this Agreement as Exhibit A. The Joint Escrow Instructions shall be delivered to the Secretary of the Company, as escrow agent
thereunder. The Participant shall deliver to such escrow agent a stock assignment duly endorsed in blank and hereby instructs the Company to deliver to such escrow agent, on behalf of the Participant,
the certificate(s) evidencing the Shares issued hereunder. Such materials shall be held by such escrow agent pursuant to the terms of such Joint Escrow Instructions. 

        8.    Restrictive Legends.    All certificates representing Shares shall have affixed thereto legends in substantially
the following form, in addition to any other legends that may be required under federal or state securities laws: 

"The
shares of stock represented by this certificate are subject to restrictions on transfer and an option to purchase set forth in a certain Restricted Stock Agreement between the corporation and the
registered owner of these shares (or his predecessor in interest), and such Agreement is available for inspection without charge at the office of the Secretary of the corporation." 

"The
shares represented by this certificate have not been registered under the Securities Act of 1933, as amended, and may not be sold, transferred or otherwise disposed of in the absence of an
effective registration statement under such Act or an opinion of counsel satisfactory to the corporation to the effect that such registration is not required." 

        9.    Provisions of the Plan.    

        (a)   This
Agreement is subject to the provisions of the Plan, a copy of which is furnished to the Participant with this Agreement. 

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        (b)   As
provided in the Plan, upon the occurrence of an Acquisition Event (as defined in the Plan), the repurchase and other rights of the Company hereunder shall inure to
the benefit of the Company's successor and shall apply to the cash, securities or other property which the Common Stock was converted into or exchanged for pursuant to such Acquisition Event in the
same manner and to the same extent as they applied to the Common Stock hereunder. If, in connection with an Acquisition Event, a portion of the cash, securities or other property received upon the
conversion or exchange of the Common Stock subject hereto is to be placed into escrow to secure indemnification or similar obligations, the mix between the vested and unvested portion of such cash,
securities or other property that is placed into escrow shall be the same as the mix between the vested and unvested portion of such securities or other property that is not subject to escrow. 

        10.    Investment Representations.    The Participant represents, warrants and covenants as follows: 

        (a)   The
Participant is purchasing the Shares for his own account for investment only, and not with a view to, or for sale in connection with, any distribution of the Shares
in violation of the Securities Act, or any rule or regulation under the Securities Act. 

        (b)   The
Participant has had such opportunity as he has deemed adequate to obtain from representatives of the Company such information as is necessary to permit him to
evaluate the merits and risks of his investment in the Company. 

        (c)   The
Participant has sufficient experience in business, financial and investment matters to be able to evaluate the risks involved in the purchase of the Shares and to
make an informed investment decision with respect to such purchase. 

        (d)   The
Participant can afford a complete loss of the value of the Shares and is able to bear the economic risk of holding such Shares for an indefinite period. 

        (e)   The
Participant understands that (i) the Shares have not been registered under the Securities Act and are "restricted securities" within the meaning of
Rule 144 under the Securities Act; (ii) the Shares cannot be sold, transferred or otherwise disposed of unless they are subsequently registered under the Securities Act or an exemption
from registration is then available; (iii) in any event, the exemption from registration under Rule 144 will not be available for at least one year and even then will not be available
unless a public market then exists for the Common Stock, adequate information concerning the Company is then available to the public, and other terms and conditions of Rule 144 are complied
with; and (iv) there is now no registration statement on file with the Securities and Exchange Commission with respect to any stock of the Company and the Company has no obligation or current
intention to register the Shares under the Securities Act. 

        11.    Withholding Taxes; Section 83(b) Election.    

        (a)   The
Participant acknowledges and agrees that the Company has the right to deduct from payments of any kind otherwise due to the Participant any federal, state or local
taxes of any kind required by law to be withheld with respect to the purchase of the Shares by the Participant or the lapse of the Purchase Option. 

        (b)   The
Participant has reviewed with the Participant's own tax advisors the federal, state, local and foreign tax consequences of this investment and the transactions
contemplated by this Agreement. The Participant is relying solely on such advisors and not on any statements or representations of the Company or any of its agents. The Participant understands that
the Participant (and not the Company) shall be responsible for the Participant's own tax liability that may arise as a result of this investment or the transactions contemplated by this Agreement. The
Participant understands that it may be beneficial in many circumstances to elect to be taxed at the time of the Shares are purchased rather than when and as the Company's Purchase Option expires 

5

 

by
filing an election under Section 83(b) of the Code with the IRS within 30 days from the date of purchase. 

        THE
PARTICIPANT ACKNOWLEDGES THAT IT IS THE PARTICIPANT'S SOLE RESPONSIBILITY AND NOT THE COMPANY'S TO FILE TIMELY THE ELECTION UNDER SECTION 83(b), EVEN IF THE PARTICIPANT REQUESTS THE
COMPANY OR ITS REPRESENTATIVES TO MAKE THIS FILING ON THE PARTICIPANT'S BEHALF. 

        12.    No Rights to Employment.    The Participant acknowledges and agrees that the vesting of the shares pursuant to
Section 2 hereof is earned only by continuing service as an employee at the will of the Company (not through the act of being hired or purchasing shares hereunder). The Participant further
acknowledges and agrees that the transactions contemplated hereunder and the vesting schedule set forth herein do not constitute an express or implied promise of continued engagement as an employee
for the vesting period, for any period, or at all. 

        13.    Severability.    The invalidity or unenforceability of any provision of this Agreement shall not affect the
validity or enforceability of any other provision of this Agreement, and each other provision of this Agreement shall be severable and enforceable to the extent permitted by law. 

        14.    Waiver.    Any provision for the benefit of the Company contained in this Agreement may be waived, either
generally or in any particular instance, by the Board of Directors of the Company. 

        15.    Binding Effect.    This Agreement shall be binding upon and inure to the benefit of the Company and the
Participant and their respective heirs, executors, administrators, legal representatives, successors and assigns, subject to the restrictions on transfer set forth in Sections 4 and 5 of this
Agreement. 

        16.    Notice.    All notices required or permitted hereunder shall be in writing and deemed effectively given upon
personal delivery or five days after deposit in the United States Post Office, by registered or certified mail, postage prepaid, addressed to the other party hereto at the address shown beneath his or
its respective signature to this Agreement, or at such other address or addresses as either party shall designate to the other in accordance with this Section 16. 

        17.    Pronouns.    Whenever the context may require, any pronouns used in this Agreement shall include the
corresponding masculine, feminine or neuter forms, and the singular form of nouns and pronouns shall include the plural, and vice versa. 

        18.    Entire Agreement.    This Agreement and the Plan constitutes the entire agreement between the parties, and
supersedes all prior agreements and understandings, relating to the subject matter of this Agreement. 

        19.    Amendment.    This Agreement may be amended or modified only by a written instrument executed by both the
Company and the Participant. 

        20.    Governing Law.    This Agreement shall be construed, interpreted and enforced in accordance with the internal
laws of the State of Delaware without regard to any applicable conflicts of laws. 

        21.    Participant's Acknowledgments.    The Participant acknowledges that he: (a) has read this Agreement;
(b) has been represented in the preparation, negotiation and execution of this Agreement by legal counsel of the Participant's own choice or has voluntarily declined to seek such counsel;
(c) understands the terms and consequences of this Agreement; and (d) is fully aware of the legal and binding effect of this Agreement. 

[Signature
Page to Follow] 

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        IN
WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first above written. 

	

 	
 	
STARENT NETWORKS, CORP.
	

 	
 	

By:	

    
 John P. Delea, Jr.
	 	 	Title:	Secretary
	 	 	Address:	30 International Place

Tewksbury, MA

        The
Participant has reviewed the provisions of this Agreement, has had an opportunity to obtain the advice of the Purchaser's own tax and legal advisors prior to executing this Agreement
and fully understands and agrees to the provisions hereof. The Participant understands that the law firm of Hale and Dorr LLP, is acting as counsel to the Company in connection with the transactions
contemplated by the Agreement, and is not acting as counsel for the Participant. 

	

 	
 	

    
Name

Address:

7

  

 
 

STARENT NETWORKS, CORP.    
    

        Joint Escrow Instructions

 
 

XXX, 2000    
    

John
P. Delea, Jr.

Secretary of Starent Networks, Corp.

30 International Place

Tewksbury, MA 01876 

Dear
Madam: 

        As
Escrow Agent for Starent Networks, Corp., a Delaware corporation (the "Company"), and the undersigned person ("Holder"), you are hereby authorized and directed to hold the documents
delivered to you pursuant to the terms of that certain Restricted Stock Agreement (the "Agreement") of even date herewith, to which a copy of these Joint Escrow Instructions is attached, in accordance
with the following instructions: 

        1.    Appointment.    Holder irrevocably authorizes the Company to deposit with you any certificates evidencing Shares
(as defined in the Agreement) to be held by you hereunder and any additions and substitutions to said Shares. Holder does hereby irrevocably constitute and appoint you as his
attorney-in-fact and agent for the term of this escrow to execute with respect to such Shares all documents necessary or appropriate to make such Shares negotiable and to
complete any transaction herein contemplated. Subject to the provisions of this paragraph 1 and the
terms of the Agreement, Holder shall exercise all rights and privileges of a stockholder of the Company while the Shares are held by you. 

        2.    Closing of Purchase.    

        (a)   Upon
any purchase by the Company of the Shares pursuant to the Agreement, the Company shall give to Holder and you a written notice specifying the purchase price for the
Shares, as determined pursuant to the Agreement, and the time for a closing hereunder (the "Closing") at the principal office of the Company. Holder and the Company hereby irrevocably authorize and
direct you to close the transaction contemplated by such notice in accordance with the terms of said notice. 

        (a)   At
the Closing, you are directed (a) to date the stock assignment form or forms necessary for the transfer of the Shares, (b) to fill in on such form or
forms the number of Shares being transferred, and (c) to deliver same, together with the certificate or certificates evidencing the Shares to be transferred, to the Company against the
simultaneous delivery to you of the purchase price for the Shares being purchased pursuant to the Agreement. 

        3.    Withdrawal.    The Holder shall have the right to withdraw from this escrow any Shares as to which the Purchase
Option (as defined in the Agreement) has terminated or expired. 

        4.    Duties of Escrow Agent.    

        (a)   Your
duties hereunder may be altered, amended, modified or revoked only by a writing signed by all of the parties hereto. 

        (b)   You
shall be obligated only for the performance of such duties as are specifically set forth herein and may rely and shall be protected in relying or refraining from
acting on any instrument reasonably believed by you to be genuine and to have been signed or presented by the proper party or parties. You shall not be personally liable for any act you may do or omit
to do hereunder as Escrow Agent or as attorney-in-fact of Holder while acting in good faith and in the exercise of 

8

 

your
own good judgment, and any act done or omitted by you pursuant to the advice of your own attorneys shall be conclusive evidence of such good faith. 

        (c)   You
are hereby expressly authorized to disregard any and all warnings given by any of the parties hereto or by any other person or Company, excepting only orders or
process of courts of law, and are hereby expressly authorized to comply with and obey orders, judgments or decrees of any court. In case you obey or comply with any such order, judgment or decree of
any court, you shall not be liable to any of the parties hereto or to any other person, firm or Company by reason of such compliance, notwithstanding any such order, judgment or decree being
subsequently reversed, modified, annulled, set aside, vacated or found to have been entered without jurisdiction. 

        (d)   You
shall not be liable in any respect on account of the identity, authority or rights of the parties executing or delivering or purporting to execute or deliver the
Agreement or any documents or papers deposited or called for hereunder. 

        (e)   You
shall be entitled to employ such legal counsel and other experts as you may deem necessary properly to advise you in connection with your obligations hereunder and
may rely upon the advice of such counsel. 

        (f)    Your
rights and responsibilities as Escrow Agent hereunder shall terminate if (i) you cease to be Secretary of the Company or (ii) you resign by written
notice to each party. In the event of a termination under clause (i), your successor as Secretary shall become Escrow Agent hereunder; in the event of a termination under clause (ii),
the Company shall appoint a successor Escrow Agent hereunder. 

        (g)   If
you reasonably require other or further instruments in connection with these Joint Escrow Instructions or obligations in respect hereto, the necessary parties hereto
shall join in furnishing such instruments. 

        (h)   It
is understood and agreed that should any dispute arise with respect to the delivery and/or ownership or right of possession of the securities held by you hereunder,
you are authorized and directed to retain in your possession without liability to anyone all or any part of said securities until such dispute shall have been settled either by mutual written
agreement of the parties concerned or by a final order, decree or judgment of a court of competent jurisdiction after the time for appeal has expired and no appeal has been perfected, but you shall be
under no duty whatsoever to institute or defend any such proceedings. 

        (i)    These
Joint Escrow Instructions set forth your sole duties with respect to any and all matters pertinent hereto and no implied duties or obligations shall be read into
these Joint Escrow Instructions against you. 

        (j)    The
Company shall indemnify you and hold you harmless against any and all damages, losses, liabilities, costs, and expenses, including attorneys' fees and disbursements,
for anything done or omitted to be done by you as Escrow Agent in connection with this Agreement or the performance of your duties hereunder, except such as shall result from your gross negligence or
willful misconduct. 

        5.    Notice.    Any notice required or permitted hereunder shall be given in writing and shall be deemed effectively
given upon personal delivery or upon deposit in the United States Post Office, by registered or certified mail with postage and fees prepaid, addressed to each of the other parties 

9

 

thereunto
entitled at the following addresses, or at such other addresses as a party may designate by ten days' advance written notice to each of the other parties hereto. 

	COMPANY:	 	Starent Networks, Corp.

30 International Place

Tewksbury, MA 01876

Attn: John P. Delea, Jr., Secretary
	

HOLDER:	
 	

Notices to Holder shall be sent to the address set forth below Holder's signature below.
	

ESCROW AGENT:	
 	

Starent Networks, Corp.

30 International Place

Tewksbury, MA 01876

Attn: John P. Delea, Jr., Secretary

        6.    Miscellaneous.    

        (a)   By
signing these Joint Escrow Instructions, you become a party hereto only for the purpose of said Joint Escrow Instructions, and you do not become a party to the
Agreement. 

        (b)   This
instrument shall be binding upon and inure to the benefit of the parties hereto and their respective successors and permitted assigns. 

	 	 	Very truly yours,
	 	 	 	 	 
	 	 	STARENT NETWORKS, CORP.
	 	 	 	 	 
	 	 	 	 	 
	 	 	By:	 	 
	 	 	 	 	
 John P. Delea, Jr.
	 	 	Title:	 	Secretary
	 	 	 	 	 
	 	 	 	 	 
	 	 	HOLDER:
	 	 	 	 	 
	 	 	 	 	 
	 	 	

	 	 	 	 	Name

Address:

	 	 	Date Signed:	 	 
	 	 	 	 	

	ESCROW AGENT:	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	
 John P. Delea, Jr., as Secretary	 	 	 	 

10

 
 
 

STOCK POWER    
    

        FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers
unto                                         
       (                        ) shares of Common Stock of Starent
Networks, Corp., a Delaware corporation, and does hereby irrevocably constitute and appoint the Secretary of Starent Networks, Corp. as its Attorney to transfer said shares on the books of said
corporation with full power of substitution in the premises. 

	Dated:            	 	Signature:
	 	 	 
	 	 	 
	 	 	
Name

11

 
 
 

STOCK POWER    
    

        FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers
unto                                         
                               
(                        ) shares of Common
Stock of Starent Networks, Corp., a Delaware corporation, and does hereby irrevocably constitute and appoint the Secretary of Starent Networks, Corp. as its Attorney to transfer said shares on the
books of said corporation with full power of substitution in the premises. 

	Dated:            	 	Signature:
	 	 	 
	 	 	 
	 	 	
Name

12

 
 

STARENT NETWORKS, CORP.    
    
    Restricted Stock Agreement
  Granted Under 2000 Stock Incentive Plan    
    

        AGREEMENT made this 22nd day of December, 2006, between Starent Networks, Corp., a Delaware corporation (the "Company"), and [Director]
(the "Participant"). 

        For
valuable consideration, receipt of which is acknowledged, the parties hereto agree as follows: 

        1.    Purchase of Shares.    

        The
Company shall issue and sell to the Participant, and the Participant shall purchase from the Company, subject to the terms and conditions set forth in this Agreement and in the
Company's 2000 Stock Incentive Plan (the "Plan"), 100,000 shares (the "Shares") of common stock, $0.001 par value, of the Company ("Common Stock"), at a purchase price of $3.42 per share. The
aggregate purchase price for the Shares shall be paid by the Participant by check payable to the order of the Company or such other method as may be acceptable to the Company. Upon receipt by the
Company of payment for the Shares, the Company shall issue to the Participant one or more certificates in the name of the Participant for that number of Shares purchased by the Participant. The
Participant agrees that the Shares shall be subject to the purchase options set forth in Sections 2 and 5 of this Agreement and the restrictions on transfer set forth in Section 4 of this
Agreement. 

        2.    Purchase Option.    

        (a)   In
the event that the Participant ceases to serve as a member of the Company's board of directors for any reason or no reason, with or without cause, prior to
December 22, 2010, the Company shall have the right and option (the "Purchase Option") to purchase from the Participant, for a sum of $3.42 per share (the "Option Price"), some or all of the
Unvested Shares (as defined below). 

        "Unvested
Shares" means the total number of Shares multiplied by the Applicable Percentage at the time the Purchase Option becomes exercisable by the Company. The "Applicable Percentage"
shall be (i) 100% during the 12-month period ending December 22, 2007, (ii) 75% less 6.25% for
each three months of service as a member of the Company's board of directors completed by the Participant from and after December 22, 2007, and (iii) zero on or after December 22,
2010. Shares that are not Unvested Shares shall be referred to as "Vested Shares." 

        (b)   In
the event of a Change of Control (as defined below), notwithstanding anything herein to the contrary, immediately prior to the closing of the Change of Control all of
the Shares shall become Vested Shares and the Applicable Percentage shall be 0%. 

        (c)   For
the purposes of this Agreement, "Change of Control" shall mean any (i) merger or consolidation which results in the voting securities of the Company
outstanding immediately prior thereto representing immediately thereafter (either by remaining outstanding or by being converted into voting securities of the surviving or acquiring entity (the
"Acquiror")) less than a majority of the combined voting power of the voting securities of the Company or the Acquiror outstanding immediately after such merger or consolidation, (ii) sale of
all or substantially all of the assets of the Company or (iii) sale of shares of capital stock of the Company, in a single transaction or series of related transactions, representing at least
80% of the voting power of the outstanding securities of the Company. 

        3.    Exercise of Purchase Option and Closing.    

        (a)   The
Company may exercise the Purchase Option by delivering or mailing to the Participant (or his estate), within 90 days after the termination of the employment
of the Participant with the Company, a written notice of exercise of the Purchase Option. Such notice shall specify the number of Shares to be purchased. If and to the extent the Purchase Option is
not so exercised by the giving of such a notice within such 90-day period, the Purchase Option shall automatically expire and terminate effective upon the expiration of such
90-day period. 

 

        (b)   Within
10 days after delivery to the Participant of the Company's notice of the exercise of the Purchase Option pursuant to subsection (a) above, the
Participant (or his estate) shall, pursuant to the provisions of the Joint Escrow Instructions referred to in Section 7 below, tender to the Company at its principal offices the certificate or
certificates representing the Shares which the Company has elected to purchase in accordance with the terms of this Agreement, duly endorsed in blank or with duly endorsed stock powers attached
thereto, all in form suitable for the transfer of such Shares to the Company. Promptly following its receipt of such certificate or certificates, the Company shall pay to the Participant the aggregate
Option Price for such Shares (provided that any delay in making such
payment shall not invalidate the Company's exercise of the Purchase Option with respect to such Shares). 

        (c)   After
the time at which any Shares are required to be delivered to the Company for transfer to the Company pursuant to subsection (b) above, the Company shall not
pay any dividend to the Participant on account of such Shares or permit the Participant to exercise any of the privileges or rights of a stockholder with respect to such Shares, but shall, in so far
as permitted by law, treat the Company as the owner of such Shares. 

        (d)   The
Option Price may be payable, at the option of the Company, in cancellation of all or a portion of any outstanding indebtedness of the Participant to the Company or
in cash (by check) or both. 

        (e)   The
Company shall not purchase any fraction of a Share upon exercise of the Purchase Option, and any fraction of a Share resulting from a computation made pursuant to
Section 2 of this Agreement shall be rounded to the nearest whole Share (with any one-half Share being rounded upward). 

        (f)    The
Company may assign its Purchase Option to one or more persons or entities. 

        4.    Restrictions on Transfer.    

        (a)   The
Participant shall not sell, assign, transfer, pledge, hypothecate or otherwise dispose of, by operation of law or otherwise (collectively "transfer") any Shares, or
any interest therein, that are subject to the Purchase Option, except that the Participant may transfer such Shares (i) to or for the benefit of any spouse, child or grandchild of the
Participant (collectively, "Approved Relatives") or to a trust established solely for the benefit of the Participant and/or Approved Relatives, provided
that such Shares shall remain subject to this Agreement (including without limitation the restrictions on transfer set forth in this Section 4, the Purchase Option and the right of first
refusal set forth in Section 5) and such permitted transferee shall, as a condition to such transfer, deliver to the Company a written instrument confirming that such transferee shall be bound
by all of the terms and conditions of this Agreement or (ii) as part of the sale of all or substantially all of the shares of capital stock of the Company (including pursuant to a merger or
consolidation), provided that, in accordance with the Plan, the securities or other property received by the Participant in connection with such
transaction shall remain subject to this Agreement. 

        (b)   The
Participant shall not transfer any Shares, or any interest therein, that are no longer subject to the Purchase Option, except in accordance with Section 5
below. 

        5.    Right of First Refusal.    

        (a)   If
the Participant proposes to transfer any Shares that are no longer subject to the Purchase Option (either because they are no longer Unvested Shares or because the
Purchase Option expired unexercised), then the Participant shall first give written notice of the proposed transfer (the "Transfer Notice") to the Company. The Transfer Notice shall name the proposed
transferee and state the number of such Shares the Participant proposes to transfer (the "Offered Shares"), the price per share and all other material terms and conditions of the transfer. 

2

 

        (b)   For
30 days following delivery to the Company of such Transfer Notice, the Company shall have the option to purchase all (but not less than all) of the Offered
Shares at the price and upon the terms set forth in the Transfer Notice. In the event the Company elects to purchase all of the Offered Shares, it shall give written notice of such election to the
Participant within such 30-day period. Within 10 days after delivery to the Participant of such notice, the Participant shall tender to the Company at its principal offices the
certificate or certificates representing the Offered Shares, duly endorsed in blank by the Participant or with duly endorsed stock powers attached thereto, all in form suitable for transfer of the
Offered Shares to the Company. Promptly following receipt of such certificate or certificates, the Company shall deliver or mail to the Participant a check in payment of the purchase price for the
Offered Shares; provided that if the terms of payment set forth in the Transfer Notice were other than cash against delivery, the Company may pay for
the Offered Shares on the same terms and conditions as were set forth in the Transfer Notice; and provided further that any delay in making such payment
shall not invalidate the Company's exercise of its option to purchase the Offered Shares. 

        (c)   If
the Company does not elect to acquire all of the Offered Shares, the Participant may, within the 30-day period following the expiration of the option
granted to the Company under subsection (b) above, transfer the Offered Shares to the proposed transferee, provided that such transfer shall not
be on terms and conditions more favorable to the transferee than those contained in the Transfer Notice. Notwithstanding any of the above, all Offered Shares transferred pursuant to this
Section 5 shall remain subject to this Agreement (including without limitation the restrictions on transfer set forth in Section 4 and the right of first refusal set forth in this
Section 5) and such transferee shall, as a condition to such transfer, deliver to the Company a written instrument confirming that such transferee shall be bound by all of the terms and
conditions of this Agreement. 

        (d)   After
the time at which the Offered Shares are required to be delivered to the Company for transfer to the Company pursuant to subsection (b) above, the Company
shall not pay any dividend to the Participant on account of such Offered Shares or permit the Participant to exercise any of the privileges or rights of a stockholder with respect to such Shares, but
shall, in so far as permitted by law, treat the Company as the owner of such Offered Shares. 

        (e)   The
following transactions shall be exempt from the provisions of this Section 5: 

        (1)   a
transfer of Shares to or for the benefit of any Approved Relatives, or to a trust established solely for the benefit of the Participant and/or Approved Relatives; 

        (2)   any
transfer pursuant to an effective registration statement filed by the Company under the Securities Act of 1933, as amended (the "Securities Act"); and 

        (3)   the
sale of all or substantially all of the shares of capital stock of the Company (including pursuant to a merger or consolidation); 

provided, however, that in the case of a transfer pursuant to clause (1) above, such Shares shall remain subject to this Agreement (including
without limitation the restrictions on transfer set forth in Section 4 and the right of first refusal set forth in this Section 5) and such transferee shall, as a condition to such
transfer, deliver to the Company a written instrument confirming that such transferee shall be bound by all of the terms and conditions of this Agreement. 

        (f)    The
Company may assign its rights to purchase Offered Shares in any particular transaction under this Section 5 to one or more persons or entities. 

3

 

        (g)   The
provisions of this Section 5 shall terminate upon the earlier of the following events: 

        (1)   the
closing of the sale of shares of Common Stock in an underwritten public offering pursuant to an effective registration statement filed by the Company under the
Securities Act; or 

        (2)   the
sale of all or substantially all of the capital stock, assets or business of the Company, by merger, consolidation, sale of assets or otherwise (other than a merger
or consolidation in which all or substantially all of the individuals and entities who were beneficial owners of the Common Stock immediately prior to such transaction beneficially own, directly or
indirectly, more than 75% of the outstanding securities entitled to vote generally in the election of directors of the resulting, surviving or acquiring corporation in such transaction). 

        (h)   The
Company shall not be required (1) to transfer on its books any of the Shares which shall have been sold or transferred in violation of any of the provisions
set forth in this Agreement, or (2) to treat as owner of such Shares or to pay dividends to any transferee to whom any such Shares shall have been so sold or transferred. 

        6.    Agreement in Connection with Public Offering.    

        The
Participant agrees, in connection with the initial underwritten public offering of the Company's securities pursuant to a registration statement under the Securities Act,
(i) not to sell, make short sale of, loan, grant any options for the purchase of, or otherwise dispose of any shares of Common Stock held by the Participant (other than those shares included in
the offering) without the prior written consent of the Company or the underwriters managing such initial underwritten public offering of the Company's securities for a period of 180 days from
the effective date of such registration statement, and (ii) to execute any agreement reflecting clause (i) above as may be requested by the Company or the managing underwriters at the
time of such offering. 

        7.    Escrow.    

        The
Participant shall, upon the execution of this Agreement, execute Joint Escrow Instructions in the form attached to this Agreement as  Exhibit A. The Joint Escrow Instructions shall be delivered to
the Secretary of the Company, as escrow agent thereunder. The Participant shall
deliver to such escrow agent a stock assignment duly endorsed in blank, in the form attached to this Agreement as Exhibit B, and hereby instructs
the Company to deliver to such escrow agent, on behalf of the Participant, the certificate(s) evidencing the Shares issued hereunder. Such materials shall be held by such escrow agent pursuant to the
terms of such Joint Escrow Instructions. 

        8.    Restrictive Legends.    

        All
certificates representing Shares shall have affixed thereto legends in substantially the following form, in addition to any other legends that may be required under federal or state
securities laws: 

"The
shares of stock represented by this certificate are subject to restrictions on transfer and an option to purchase set forth in a certain Restricted Stock Agreement between the corporation and the
registered owner of these shares (or his predecessor in interest), and such Agreement is available for inspection without charge at the office of the Secretary of the corporation." 

"The
shares represented by this certificate have not been registered under the Securities Act of 1933, as amended, and may not be sold, transferred or otherwise disposed of in the absence of an
effective registration statement under such Act or an opinion of counsel satisfactory to the corporation to the effect that such registration is not required." 

4

 

        9.    Provisions of the Plan.    

        (a)   This
Agreement is subject to the provisions of the Plan, a copy of which is furnished to the Participant with this Agreement. 

        (b)   As
provided in the Plan, upon the occurrence of an Acquisition Event (as defined in the Plan), the repurchase and other rights of the Company hereunder shall inure to
the benefit of the Company's successor and shall apply to the cash, securities or other property which the Common Stock was converted into or exchanged for pursuant to such Acquisition Event in the
same manner and to the same extent as they applied to the Shares under this Agreement. If, in connection with an Acquisition Event, a portion of the cash, securities and/or other property received
upon the conversion or exchange of the Shares is to be placed into escrow to secure indemnification or similar obligations, the mix between the vested and unvested portion of such cash, securities
and/or other property that is placed into escrow shall be the same as the mix between the vested and unvested portion of such cash, securities and/or other property that is not subject to escrow. 

        10.    Investment Representations.    

        The
Participant represents, warrants and covenants as follows: 

        (a)   The
Participant is purchasing the Shares for his own account for investment only, and not with a view to, or for sale in connection with, any distribution of the Shares
in violation of the Securities Act, or any rule or regulation under the Securities Act. 

        (b)   The
Participant has had such opportunity as he has deemed adequate to obtain from representatives of the Company such information as is necessary to permit him to
evaluate the merits and risks of his investment in the Company. 

        (c)   The
Participant has sufficient experience in business, financial and investment matters to be able to evaluate the risks involved in the purchase of the Shares and to
make an informed investment decision with respect to such purchase. 

        (d)   The
Participant can afford a complete loss of the value of the Shares and is able to bear the economic risk of holding such Shares for an indefinite period. 

        (e)   The
Participant understands that (i) the Shares have not been registered under the Securities Act and are "restricted securities" within the meaning of
Rule 144 under the Securities Act; (ii) the Shares cannot be sold, transferred or otherwise disposed of unless they are subsequently registered under the Securities Act or an exemption
from registration is then available; (iii) in any event, the exemption from registration under Rule 144 will not be available for at least one year and even then will not be available
unless a public market then exists for the Common Stock, adequate information concerning the Company is then available to the public, and other terms and conditions of Rule 144 are complied
with; and (iv) there is now no registration statement on file with the Securities and Exchange Commission with respect to any stock of the Company and the Company has no obligation or current
intention to register the Shares under the Securities Act. 

        11.    Withholding Taxes; Section 83(b) Election.    

        (a)   The
Participant acknowledges and agrees that the Company has the right to deduct from payments of any kind otherwise due to the Participant any federal, state or local
taxes of any kind required by law to be withheld with respect to the purchase of the Shares by the Participant or the lapse of the Purchase Option. 

        (b)   The
Participant has reviewed with the Participant's own tax advisors the federal, state, local and foreign tax consequences of this investment and the transactions
contemplated by this Agreement. The Participant is relying solely on such advisors and not on any statements or 

5

 

representations
of the Company or any of its agents. The Participant understands that the Participant (and not the Company) shall be responsible for the Participant's own tax liability that may arise
as a result of this investment or the transactions contemplated by this Agreement. The Participant understands that it may be beneficial in many circumstances to elect to be taxed at the time the
Shares are purchased rather than when and as the Company's Purchase Option expires by filing an election under Section 83(b) of the Internal Revenue Code of 1986 with the I.R.S. within
30 days from the date of purchase. 

        THE
PARTICIPANT ACKNOWLEDGES THAT IT IS SOLELY THE PARTICIPANT'S RESPONSIBILITY AND NOT THE COMPANY'S TO FILE TIMELY THE ELECTION UNDER SECTION 83(b), EVEN IF THE PARTICIPANT REQUESTS
THE COMPANY OR ITS REPRESENTATIVES TO MAKE THIS FILING ON THE PARTICIPANT'S BEHALF. 

        12.    Miscellaneous.    

        (a)    No Rights to Directorship.    The Participant acknowledges and agrees that the vesting of the Shares pursuant
to Section 2 hereof is earned only by continuing service as a director of the Company (not through the act of being hired or purchasing shares hereunder). The Participant further acknowledges
and agrees that the transactions contemplated hereunder and the vesting schedule set forth herein do not constitute an express or implied promise of continued engagement as a director for the vesting
period, for any period, or at all. 

        (b)    Severability.    The invalidity or unenforceability of any provision of this Agreement shall not affect the
validity or enforceability of any other provision of this Agreement, and each other provision of this Agreement shall be severable and enforceable to the extent permitted by law. 

        (c)    Waiver.    Any provision for the benefit of the Company contained in this Agreement may be waived, either
generally or in any particular instance, by the Board of Directors of the Company. 

        (d)    Binding Effect.    This Agreement shall be binding upon and inure to the benefit of the Company and the
Participant and their respective heirs, executors, administrators, legal representatives, successors and assigns, subject to the restrictions on transfer set forth in Sections 4 and 5 of this
Agreement. 

        (e)    Notice.    All notices required or permitted hereunder shall be in writing and deemed effectively given upon
personal delivery or five days after deposit in the United States Post Office, by registered or certified mail, postage prepaid, addressed to the other party hereto at the address shown beneath his or
its respective signature to this Agreement, or at such other address or addresses as either party shall designate to the other in accordance with this Section 12(e). 

        (f)    Pronouns.    Whenever the context may require, any pronouns used in this Agreement shall include the
corresponding masculine, feminine or neuter forms, and the singular form of nouns and pronouns shall include the plural, and vice versa. 

        (g)    Entire Agreement.    This Agreement and the Plan constitute the entire agreement between the parties, and
supersedes all prior agreements and understandings, relating to the subject matter of this Agreement. 

        (h)    Amendment.    This Agreement may be amended or modified only by a written instrument executed by both the
Company and the Participant. 

        (i)    Governing Law.    This Agreement shall be construed, interpreted and enforced in accordance with the internal
laws of the State of Delaware without regard to any applicable conflicts of laws. 

6

 

        (j)    Participant's Acknowledgments.    The Participant acknowledges that he or she: (i) has read this
Agreement; (ii) has been represented in the preparation, negotiation, and execution of this Agreement by legal counsel of the Participant's own choice or has voluntarily declined to seek such
counsel; (iii) understands the terms and consequences of this Agreement; (iv) is fully aware of the legal and binding effect of this Agreement; and (v) understands that the law
firm of WilmerHale, is acting as counsel to the Company in connection with the transactions contemplated by the Agreement, and is not acting as counsel for the Participant. 

        IN
WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first above written. 

	 	 	STARENT NETWORKS, CORP.
	 	 	 	 	 
	 	 	 	 	 
	 	 	By:	 	 
	 	 	 	 	

	 	 	Name:

Title:	 	 

        The
Participant has reviewed the provisions of this Agreement, has had an opportunity to obtain the advice of the Purchaser's own tax and legal advisors prior to executing this Agreement
and fully understands and agrees to the provisions hereof. 

	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	
 [Name of Director]
	 	 	 	 	 
	 	 	Address:	 	 
	 	 	 	 	

	 	 	 	 	 
	 	 	 	 	

7

Exhibit A  

 
 

STARENT NETWORKS, CORP.    
    

Joint Escrow Instructions

December 22,
2006 

Kevin
Newman

Secretary

Starent Networks, Corp.

30 International Place

Tewksbury, MA 01876 

Dear
Sir: 

        As
Escrow Agent for Starent Networks, Corp., a Delaware corporation, and its successors in interest under the Restricted Stock Agreement (the "Agreement") of even date herewith, to which
a copy of these Joint Escrow Instructions is attached (the "Company"), and the undersigned person ("Holder"), you are hereby authorized and directed to hold the documents delivered to you pursuant to
the terms of the Agreement in accordance with the following instructions: 

        1.    Appointment.    Holder irrevocably authorizes the Company to deposit with you any certificates evidencing Shares
(as defined in the Agreement) to be held by you hereunder and any additions and substitutions to said Shares. For purposes of these Joint Escrow Instructions, "Shares" shall be deemed
to include any additional or substitute property. Holder does hereby irrevocably constitute and appoint you as his attorney-in-fact and agent for the term of this escrow to
execute with respect to such Shares all documents necessary or appropriate to make such Shares negotiable and to complete any transaction herein contemplated. Subject to the provisions of this
Section 1 and the terms of the Agreement, Holder shall exercise all rights and privileges of a stockholder of the Company while the Shares are held by you. 

        2.    Closing of Purchase.    

        (a)   Upon
any purchase by the Company of the Shares pursuant to the Agreement, the Company shall give to Holder and you a written notice specifying the number of Shares to be
purchased, the purchase price for the Shares, as determined pursuant to the Agreement, and the time for a closing hereunder (the "Closing") at the principal office of the Company. Holder and the
Company hereby irrevocably authorize and direct you to close the transaction contemplated by such notice in accordance with the terms of said notice. 

        (b)   At
the Closing, you are directed (i) to date the stock assignment form or forms necessary for the transfer of the Shares, (ii) to fill in on such form or
forms the number of Shares being transferred, and (iii) to deliver the same, together with the certificate or certificates evidencing the Shares to be transferred, to the Company against the
simultaneous delivery to you of the purchase price for the Shares being purchased pursuant to the Agreement. 

        3.    Withdrawal.    The Holder shall have the right to withdraw from this escrow any Shares as to which the Purchase
Option (as defined in the Agreement) has terminated or expired. 

        4.    Duties of Escrow Agent.    

        (a)   Your
duties hereunder may be altered, amended, modified or revoked only by a writing signed by all of the parties hereto. 

        (b)   You
shall be obligated only for the performance of such duties as are specifically set forth herein and may rely and shall be protected in relying or refraining from
acting on any instrument reasonably believed by you to be genuine and to have been signed or presented by the proper party or parties. You shall not be personally liable for any act you may do or omit
to do hereunder as Escrow Agent or as attorney-in-fact of Holder while acting in good faith and in the exercise of 

 

your
own good judgment, and any act done or omitted by you pursuant to the advice of your own attorneys shall be conclusive evidence of such good faith. 

        (c)   You
are hereby expressly authorized to disregard any and all warnings given by any of the parties hereto or by any other person or entity, excepting only orders or
process of courts of law, and are hereby expressly authorized to comply with and obey orders, judgments or decrees of any court. If you are uncertain of any actions to be taken or instructions to be
followed, you may refuse to act in the absence of an order, judgment or decrees of a court. In case you obey or comply with any such order, judgment or decree of any court, you shall not be liable to
any of the parties hereto or to any other person or entity, by reason of such compliance, notwithstanding any such order, judgment or decree being subsequently reversed, modified, annulled, set aside,
vacated or found to have been entered without jurisdiction. 

        (d)   You
shall not be liable in any respect on account of the identity, authority or rights of the parties executing or delivering or purporting to execute or deliver the
Agreement or any documents or papers deposited or called for hereunder. 

        (e)   You
shall be entitled to employ such legal counsel and other experts as you may deem necessary properly to advise you in connection with your obligations hereunder and
may rely upon the advice of such counsel. 

        (f)    Your
rights and responsibilities as Escrow Agent hereunder shall terminate if (i) you cease to be Secretary of the Company or (ii) you resign by written
notice to each party. In the event of a termination under clause (i), your successor as Secretary shall become Escrow Agent hereunder; in the event of a termination under clause (ii),
the Company shall appoint a successor Escrow Agent hereunder. 

        (g)   If
you reasonably require other or further instruments in connection with these Joint Escrow Instructions or obligations in respect hereto, the necessary parties hereto
shall join in furnishing such instruments. 

        (h)   It
is understood and agreed that if you believe a dispute has arisen with respect to the delivery and/or ownership or right of possession of the securities held by you
hereunder, you are authorized and directed to retain in your possession without liability to anyone all or any part of said securities until such dispute shall have been settled either by mutual
written agreement of the parties concerned or by
a final order, decree or judgment of a court of competent jurisdiction after the time for appeal has expired and no appeal has been perfected, but you shall be under no duty whatsoever to institute or
defend any such proceedings. 

        (i)    These
Joint Escrow Instructions set forth your sole duties with respect to any and all matters pertinent hereto and no implied duties or obligations shall be read into
these Joint Escrow Instructions against you. 

        (j)    The
Company shall indemnify you and hold you harmless against any and all damages, losses, liabilities, costs, and expenses, including attorneys' fees and disbursements,
(including without limitation the fees of counsel retained pursuant to Section 4(e) above, for anything done or omitted to be done by you as Escrow Agent in connection with this Agreement or
the performance of your duties hereunder, except such as shall result from your gross negligence or willful misconduct. 

        5.    Notice.    Any notice required or permitted hereunder shall be given in writing and shall be deemed effectively
given upon personal delivery or upon deposit in the United States Post Office, by registered or certified mail with postage and fees prepaid, addressed to each of the other parties 

A-2

 

thereunto
entitled at the following addresses, or at such other addresses as a party may designate by ten days' advance written notice to each of the other parties hereto. 

	COMPANY:	 	Starent Networks, Corp.

30 International Place

Tewksbury, MA 01876

Attn: Kevin Newman, Secretary
	

HOLDER:	
 	

Notices to Holder shall be sent to the address set forth below Holder's signature below.
	

ESCROW AGENT:	
 	

Starent Networks, Corp.

30 International Place

Tewksbury, MA 01876

Attn: Kevin Newman, Secretary

        6.    Miscellaneous.    

        (a)   By
signing these Joint Escrow Instructions, you become a party hereto only for the purpose of said Joint Escrow Instructions, and you do not become a party to the
Agreement. 

        (b)   This
instrument shall be binding upon and inure to the benefit of the parties hereto and their respective successors and permitted assigns. 

	 	 	Very truly yours,
	 	 	 	 	 
	 	 	STARENT NETWORKS, CORP.
	 	 	 	 	 
	 	 	 	 	 
	 	 	By:	 	 
	 	 	 	 	

	 	 	Name:	 	 
	 	 	Title:	 	 
	 	 	 	 	 
	 	 	HOLDER:
	 	 	 	 	 
	 	 	 	 	 
	 	 	
 [Name of Director]
	 	 	 	 	 
	 	 	Address:	 	 
	 	 	 	 	

	 	 	 	 	 
	 	 	 	 	

	 	 	 	 	 
	 	 	 	 	 
	 	 	Date Signed:	 	 
	 	 	 	 	

	ESCROW AGENT:	 	 
	 	 	 
	 	 	 
	
 Kevin Newman	 	 

A-3

Exhibit B  

 
 

STOCK POWER    
    

        FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers
unto                                         
                               
(                        ) shares of Common
Stock, par value $0.001 per share, of Starent Networks, Corp., a Delaware corporation, and does hereby irrevocably constitute and appoint the Secretary of Starent Networks, Corp. as its Attorney to
transfer said shares on the books of said corporation with full power of substitution in the premises. 

	Dated:
                                    	 	Signature:
	 	 	 
	 	 	 
	 	 	
 Name

QuickLinks

STARENT NETWORKS, CORP.

XXX, 2000

STOCK POWER

STOCK POWER

STARENT NETWORKS, CORP. Restricted Stock Agreement Granted Under 2000 Stock Incentive Plan

STARENT NETWORKS, CORP.

STOCK POWERExhibit 10.8

 

EXECUTION COPY

 

STARENT NETWORKS, CORP.

 

FOURTH AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

 

This Fourth Amended and Restated Investor Rights
Agreement, dated as of May 19, 2005, is entered into by and among Starent
Networks, Corp., a Delaware corporation (the “Company”), the persons and
entities listed on the signature page hereto under the heading “Investors”
(individually, an “Investor”, and collectively, the “Investors”), Ashraf M.
Dahod and Anthony Schoener (individually, a “Founder”, and collectively, the “Founders”).

 

BACKGROUND

 

WHEREAS, the Company and certain Investors entered
into the Third Amended and Restated Investor Rights Agreement dated as of
February 13, 2004, as amended (the “Existing Investor Rights Agreement”),
thereby amending and restating in its entirety the Second Amended and Restated
Investor Rights Agreement dated as of November 20, 2003, which amended and
restated the Amended and Restated Investor Rights Agreement dated as of July
20, 2001, as amended; and

 

WHEREAS, certain Investors hold shares of the Company’s
Series A Convertible Preferred Stock $.01 par value (together with any shares
issued in exchange for such shares pursuant to Section 5A of clause B of the
Company’s Certificate of Incorporation, the “Series A Preferred Stock”) which
are convertible into shares of the Company’s Common Stock, $.001 par value (the
“Common Stock”); and

 

WHEREAS, certain Investors hold shares of the Company’s
Series B Convertible Preferred Stock $.01 par value (together with any shares
issued in exchange for such shares pursuant to Section 5A of clause B of the
Company’s Certificate of Incorporation, the “Series B Preferred Stock”) which
are convertible into shares of the Company’s Common Stock; and

 

WHEREAS, certain Investors hold shares of the Company’s
Series C Convertible Preferred Stock $.01 par value (together with any shares
issued in exchange for such shares pursuant to Section 5A of clause B of the
Company’s Certificate of Incorporation, the “Series C Preferred Stock”) which
are convertible into shares of the Company’s Common Stock; and

 

WHEREAS, certain Investors hold shares of the Company’s
Series D Convertible Preferred Stock $.01 par value (together with any shares
issued in exchange for such shares pursuant to Section 5A of clause B of the
Company’s Certificate of Incorporation, the “Series D Preferred Stock”) which
are convertible into shares of the Company’s Common Stock; and

 

WHEREAS, the Company is on this date issuing shares of
the Company’s Series E Convertible Preferred Stock, $.01 par value (together
with any shares issued in exchange for such shares pursuant to Section 5A of
clause B of the Company’s Certificate of Incorporation, the “Series E Preferred
Stock”) to certain Investors (the “Series E Investors”) pursuant to a Series E
Convertible Preferred Stock Purchase Agreement by and among the Company and the
Series E Investors (the “Series E Purchase Agreement”); and

 

1

 

WHEREAS, the Company, the Investors and the Founders
wish to provide for (i) the composition of the Board of Directors of the
Company, (ii) certain arrangements with respect to the registration of
shares of capital stock of the Company under the Securities Act of 1933, and
(iii) a right of first refusal with respect to the sale of any securities
of the Company;

 

NOW, THEREFORE, in consideration of the mutual
promises and covenants contained in this Agreement, and the consummation of the
sale and purchase of the Series E Preferred Stock pursuant to the
Series E Purchase Agreement, and for other valuable consideration, receipt
of which is hereby acknowledged, the parties hereto agree as follows:

 

ARTICLE I.  DEFINITIONS

 

As used in this Agreement, the following terms shall
have the following respective meanings:

 

“Commission” means the United States Securities
and Exchange Commission, or any other federal agency at the time administering
the Securities Act.

 

“Common Stock” means the common stock, $0.001
par value per share, of the Company.

 

“Exchange Act” means the Securities Exchange
Act of 1934, as amended, or any similar federal statute, and the rules and
regulations of the Commission issued under such Act, as they each may, from
time to time, be in effect.

 

“Initial Public Offering” means the sale of
shares of Common Stock in a firm commitment underwritten public offering
pursuant to a Registration Statement at a price to the public of at least
$5.87 per share (adjusted for stock splits, stock dividends and similar
events affecting the Common Stock) resulting in proceeds (net of the
underwriting discounts or commissions and offering expenses) to the Company of
at least $10,000,000.

 

“Registration Statement” means a registration
statement filed by the Company with the Commission for a public offering and
sale of Common Stock by the Company (other than a registration statement on
Form S-8 or Form S-4, or their successors, or any other form for a
similar limited purpose, or any registration statement covering only securities
proposed to be issued in exchange for securities or assets of another
corporation).

 

“Registration Expenses” means the expenses
described in Section 4 of Article III below.

 

“Registrable Shares” means (i) the shares
of Common Stock issued or issuable upon conversion of the Shares, (ii) solely
for the purposes of Sections 2 through 10 of Article III hereof,
shares of Common Stock held by the Founders prior to the date hereof,
(iii) any shares of Common Stock, and any shares of Common Stock issued or
issuable upon the conversion or exercise of any other securities, acquired by
the Investors pursuant to Article IV of this Agreement or pursuant to the
Fourth Amended and Restated Right of First Refusal and Co-Sale Agreement of
even date herewith among the Company, the Investors and certain other parties
thereto, and (iv) any other shares of Common Stock issued in respect of
such shares set forth in the preceding clauses (i), (ii) or (iii) (because of
stock splits, stock dividends, reclassifications, recapitalizations, or similar
events); provided, however, that shares of Common Stock which are

 

2

 

Registrable Shares shall cease to be Registrable
Shares (a) upon any sale of such shares pursuant to a Registration
Statement or Rule 144 under the Securities Act, (b) upon any sale of
such shares in any manner to a person or entity which, by virtue of
Section 2 of Article V of this Agreement, is not entitled to the
rights provided by this Agreement, or (c) for purposes of Section 2
of Article III hereof, following the third anniversary of the Initial
Public Offering. Wherever reference is made in this Agreement to a request or
consent of holders of a certain percentage of Registrable Shares, the
determination of such percentage shall include shares of Common Stock issuable
upon conversion of the Shares even if such conversion has not yet been
effected.

 

“Securities Act” means the Securities Act of
1933, as amended, or any similar federal statute, and the rules and regulations
of the Commission issued under such Act, as they each may, from time to time,
be in effect.

 

“Shares” means the Series A Preferred
Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred
Stock and Series E Preferred Stock and any additional series of the Company’s
preferred stock created pursuant to Section 5A of clause B of the Company’s
Certificate of Incorporation.

 

“Stockholders” means the Investors, the
Founders and any persons or entities to whom the rights granted to Investors
under this Agreement are transferred by an Investor, its successors or
permitted assigns pursuant to Section 2 of Article V below.

 

ARTICLE II.  ELECTION OF DIRECTORS

 

1.             Voting of Shares. In any and
all elections of directors of the Company (whether at a meeting or by written
consent in lieu of a meeting), each Stockholder shall vote or cause to be voted
all Voting Shares (as defined in Section 2 of Article II below) owned
by him, her or it, or over which he, she or it has voting control, and
otherwise use his, her or its respective best efforts, so as to fix the number
of directors at five and to elect as directors (i) Ashraf M. Dahod, as
long as he is a stockholder of the Company, (ii) one individual designated
by Matrix Partners VI, L.P., who shall initially be Timothy A. Barrows, (iii) one
individual designated by North Bridge Venture Partners IV-A, L.P. and North
Bridge Venture Partners IV-B, L.P., who shall initially be Edward T. Anderson
and (iv) one individual designated by Highland Capital Partners V Limited
Partnership, who shall initially be Sean Dalton. If and when the Board of
Directors deems it appropriate to elect a fifth director, the Stockholders
shall agree to vote all of their Voting Shares to elect such fifth director as
long as he or she is an independent director and is approved by a majority of
the members of the Board of Directors referred to in clauses (i), (ii), (iii)
and (iv) of the previous sentence.

 

2.             Voting Shares. “Voting
Shares” shall mean and include any and all shares of the Common Stock, Shares,
and/or shares of capital stock of the Company, by whatever name called, which
carry voting rights (including voting rights which arise by reason of default).

 

3

 

3.             Restrictive Legend. All
certificates representing Voting Shares owned or hereafter acquired by the
Stockholders or any transferee bound by this Agreement shall have affixed
thereto a legend substantially in the following form:

 

“The shares of stock
represented by this certificate are subject to certain voting agreements as set
forth in an Investor Rights Agreement by and among the registered owner of this
certificate, the Company and certain other stockholders of the Company, a copy
of which is available for inspection at the offices of the Secretary of the
Company.”

 

4.             Transfers of Voting Rights. Any
transferee to whom Voting Shares are transferred by a Stockholder, whether
voluntarily or by operation of law, shall be bound by the voting obligations
imposed upon the transferor under this Agreement, to the same extent as if such
transferee were a Stockholder hereunder.

 

ARTICLE III.  REGISTRATION RIGHTS

 

1.             Required Registrations.

 

(a)           At
any time after the earlier of May 19, 2007 or 180 days after the closing of the
Company’s first underwritten public offering of shares of Common Stock pursuant
to a Registration Statement, Stockholders holding in the aggregate at least 35%
of the Registrable Shares held by the Stockholders may request, in writing,
that the Company effect the registration on Form S-1 or Form S-2 (or
any successor form) of Registrable Shares owned by such Stockholders having an
aggregate offering price of at least $5,000,000 (based on the market price or
fair value at the time of such request). If the Stockholders initiating the
registration intend to distribute the Registrable Shares by means of an
underwriting, they shall so advise the Company in their request. Thereupon, the
Company shall, as expeditiously as possible, use its reasonable best efforts to
effect the registration on Form S-1 or Form S-2 (or any successor
form) of all Registrable Shares which the Company has been requested to so
register.

 

(b)           At
any time after the Company becomes eligible to file a Registration Statement on
Form S-3 (or any successor form relating to secondary offerings), a
Stockholder or Stockholders may request the Company, in writing, to effect the
registration on Form S-3 (or such successor form), of Registrable Shares
having an aggregate offering price of at least $1,000,000 (based on the public
market price at the time of such request). Thereupon, the Company shall, as
expeditiously as possible, use its reasonable best efforts to effect the
registration on Form S-3 (or such successor form) of all Registrable
Shares which the Company has been requested to so register.

 

(c)           The
Company shall not be required to effect more than two registrations pursuant to
paragraph (a) above; provided, however, that such obligation
shall be deemed satisfied only when a registration statement covering the
applicable Registrable Shares shall have (i) become effective or
(ii) been withdrawn at the request of the Stockholders requesting such
registration (other than as a result of information concerning the business or
financial condition of the Company which is made known to the Stockholders
after the date on which such

 

4

 

registration was
requested). There shall be no limit to the number of registrations which may be
requested and obtained pursuant to paragraph (b) above.

 

(d)           If
at the time of any request to register Registrable Shares pursuant to this
Section 1, the Company is engaged or has plans to engage within 90 days of
the time of the request in a registered public offering of securities for its
own account or is engaged in any other activity which, in the good faith
determination of the Company’s Board of Directors, would be adversely affected
by the requested registration to the material detriment of the Company, then
the Company may at its option direct that such request be delayed for a period
not in excess of three months from the effective date of such offering or the
date of commencement of such other material activity, as the case may be, such
right to delay a request to be exercised by the Company not more than once in any
12-month period.

 

2.             Incidental Registration.

 

(a)           Whenever
the Company proposes to file a Registration Statement at any time and from time
to time, it will, prior to such filing, give written notice to all Stockholders
of its intention to do so and, upon the written request of a Stockholder or
Stockholders, given within 10 business days after the Company provides such
notice (which request shall state the intended method of disposition of such
Registrable Shares), the Company shall use its reasonable best efforts to cause
all Registrable Shares which the Company has been requested by such Stockholder
or Stockholders to register, to be registered under the Securities Act to the
extent necessary to permit their sale or other disposition in accordance with
the intended methods of distribution specified in the request of such
Stockholder or Stockholders; provided, however, that the Company
shall have the right to postpone or withdraw any registration effected pursuant
to this Section 2 without obligation to any Stockholder.

 

(b)           In
connection with any registration under this Section 2 involving an
underwriting, the Company shall not be required to include any Registrable
Shares in such registration unless the holders thereof accept the terms of the
underwriting as agreed upon between the Company and the underwriters selected
by it. If in the opinion of the managing underwriter it is desirable because of
marketing factors or otherwise to limit the number of Registrable Shares to be
included in the offering, then the Company shall be required to include in the
registration only that number of Registrable Shares, if any, which the managing
underwriter believes should be included therein; provided, however,
that no persons or entities other than the Company, the Stockholders and other
persons or entities holding registration rights shall be permitted to include
securities in the offering. If the number of Registrable Shares to be included
in the offering in accordance with the foregoing is less than the total number
of shares which the holders of Registrable Shares have requested to be
included, then the holders of Registrable Shares who have requested
registration and other holders of securities entitled to include them in such
registration shall participate in the registration pro rata based upon their
total ownership of shares of Common Stock (giving effect to the conversion into
Common Stock of all securities convertible thereinto). If any holder would thus
be entitled to include more securities than such holder requested to be
registered, the excess shall be allocated among other requesting holders pro
rata in the manner described in the preceding sentence.

 

5

 

3.             Registration Procedures. If
and whenever the Company is required by the provisions of this Agreement to use
its reasonable best efforts to effect the registration of any of the
Registrable Shares under the Securities Act, the Company shall:

 

(a)           file
with the Commission a Registration Statement with respect to such Registrable
Shares and use its reasonable best efforts to cause that Registration Statement
to become effective;

 

(b)           as
expeditiously as possible prepare and file with the Commission any amendments
and supplements to the Registration Statement and the prospectus included in
the Registration Statement as may be necessary to keep the Registration
Statement effective, in the case of a firm commitment underwritten public
offering, until each underwriter has completed the distribution of all
securities purchased by it and, in the case of any other offering, until the
earlier of the sale of all Registrable Shares covered thereby or 180 days after
the effective date thereof;

 

(c)           as
expeditiously as possible furnish to each selling Stockholder such reasonable
numbers of copies of the prospectus, including a preliminary prospectus, in
conformity with the requirements of the Securities Act, and such other
documents as the selling Stockholder may reasonably request in order to
facilitate the public sale or other disposition of the Registrable Shares owned
by the selling Stockholder; and

 

(d)           as
expeditiously as possible use its reasonable best efforts to register or
qualify the Registrable Shares covered by the Registration Statement under the
securities or Blue Sky laws of such states as the selling Stockholder shall
reasonably request, and do any and all other acts and things that may be
necessary or desirable to enable the selling Stockholder to consummate the
public sale or other disposition in such states of the Registrable Shares owned
by the selling Stockholder; provided, however, that the Company
shall not be required in connection with this paragraph (d) to qualify as
a foreign corporation or execute a general consent to service of process in any
jurisdiction.

 

If the Company has delivered preliminary or final
prospectuses to the selling Stockholders and after having done so the
prospectus is amended to comply with the requirements of the Securities Act,
the Company shall promptly notify the selling Stockholders and, if requested,
the selling Stockholder shall immediately cease making offers of Registrable
Shares and return all prospectuses to the Company. The Company shall promptly
provide each selling Stockholder with revised prospectuses and, following receipt
of the revised prospectuses, the selling Stockholder shall be free to resume
making offers of the Registrable Shares.

 

If, after a registration statement becomes effective,
the Company becomes engaged in any activity which, in the good faith determination
of the Company’s Board of Directors, involves information that would have to be
disclosed in the Registration Statement but which the Company desires to keep
confidential for valid business reasons, then the Company may at its option, by
notice to such Stockholders, require that the Stockholders who have included
Shares in such Registration Statement cease sales of such Shares under such
Registration Statement for a period not in excess of three months from the date
of such notice, such right to be exercised by the Company not more than once in
any 12-month period. If, in connection therewith, the

 

6

 

Company considers it appropriate for such Registration
Statement to be amended, the Company shall so amend such Registration Statement
as promptly as practicable and such Stockholders shall suspend any further
sales of their Shares until the Company advises them that such Registration
Statement has been amended. The time periods referred to herein during which
such Registration Statement must be kept effective shall be extended for an
additional number of days equal to the number of days during which the right to
sell shares was suspended pursuant to this paragraph.

 

4.             Allocation of Expenses. The
Company will pay all Registration Expenses of all registrations under this
Agreement. For purposes of this Section 4, the term “Registration Expenses”
shall mean all expenses incurred by the Company in complying with this
Article III, including, without limitation, all registration and filing
fees, exchange listing fees, printing expenses, fees and expenses of counsel
for the Company and fees and expenses of one counsel selected by the selling
Stockholders to represent all selling Stockholder(s), state Blue Sky fees and
expenses, and the expense of any special audits incident to or required by any
such registration, but excluding underwriting discounts, selling commissions
and the fees and expenses of selling Stockholders’ own counsel (other than the
counsel selected to represent all selling Stockholders).

 

5.             Indemnification and Contribution.

 

(a)           In
the event of any registration of any of the Registrable Shares under the
Securities Act pursuant to this Agreement, the Company will indemnify and hold
harmless the seller of such Registrable Shares, each underwriter of such
Registrable Shares, and each other person, if any, who controls such seller or
underwriter within the meaning of the Securities Act or the Exchange Act
against any losses, claims, damages or liabilities, joint or several, to which
such seller, underwriter or controlling person may become subject under the
Securities Act, the Exchange Act, state securities or Blue Sky laws or
otherwise, insofar as such losses, claims, damages or liabilities (or actions in
respect thereof) arise out of or are based upon any untrue statement or alleged
untrue statement of any material fact contained in any Registration Statement
under which such Registrable Shares were registered under the Securities Act,
any preliminary prospectus or final prospectus contained in the Registration
Statement, or any amendment or supplement to such Registration Statement, or
arise out of or are based upon the omission or alleged omission to state a
material fact required to be stated therein or necessary to make the statements
therein not misleading; and the Company will reimburse such seller, underwriter
and each such controlling person for any legal or any other expenses reasonably
incurred by such seller, underwriter or controlling person in connection with
investigating or defending any such loss, claim, damage, liability or action; provided,
however, that the Company will not be liable in any such case to a
seller, underwriter or controlling person to the extent that any such loss,
claim, damage or liability arises out of or is based upon any untrue statement
or omission made in such Registration Statement, preliminary prospectus or
final prospectus, or any such amendment or supplement, in reliance upon and in
conformity with information furnished to the Company, in writing, by or on
behalf of such seller, underwriter or controlling person specifically for use
in the preparation thereof.

 

(b)           In
the event of any registration of any of the Registrable Shares under the
Securities Act pursuant to this Agreement, each seller of Registrable Shares,
severally and not

 

7

 

jointly, will
indemnify and hold harmless the Company, each of its directors and officers and
each underwriter (if any) and each person, if any, who controls the Company or
any such underwriter within the meaning of the Securities Act or the Exchange
Act, against any losses, claims, damages or liabilities, joint or several, to
which the Company, such directors and officers, underwriter or controlling
person may become subject under the Securities Act, Exchange Act, state
securities or Blue Sky laws or otherwise, insofar as such losses, claims,
damages or liabilities (or actions in respect thereof) arise out of or are
based upon any untrue statement or alleged untrue statement of a material fact
contained in any Registration Statement under which such Registrable Shares
were registered under the Securities Act, any preliminary prospectus or final
prospectus contained in the Registration Statement, or any amendment or
supplement to the Registration Statement, or arise out of or are based upon any
omission or alleged omission to state a material fact required to be stated
therein or necessary to make the statements therein not misleading, if the
statement or omission was made in reliance upon and in conformity with
information relating to such seller furnished in writing to the Company by or
on behalf of such seller specifically for use in connection with the
preparation of such Registration Statement, prospectus, amendment or
supplement; provided, however, that the obligations of each such
Stockholder hereunder shall be limited to an amount equal to the lesser of the
net proceeds to such Stockholder of Registrable Shares sold in connection with
such registration and such stockholders pro rata portion of such claim, loss,
damage or liability.

 

(c)           Each
party entitled to indemnification under this Article III, Section 5
(the “Indemnified Party”) shall give notice to the party required to provide indemnification
(the “Indemnifying Party”) promptly after such Indemnified Party has actual
knowledge of any claim as to which indemnity may be sought, and shall permit
the Indemnifying Party to assume the defense of any such claim or any
litigation resulting therefrom; provided, that counsel for the
Indemnifying Party, who shall conduct the defense of such claim or litigation,
shall be approved by the Indemnified Party (whose approval shall not be
unreasonably withheld); and, provided further, that the failure of any
Indemnified Party to give notice as provided herein shall not relieve the
Indemnifying Party of its obligations under this Article III,
Section 5, unless and except to the extent that the Indemnifying Party is
prejudiced by the failure of the Indemnified Party to provide timely notice. The
Indemnified Party may participate in such defense at such party’s expense; provided,
however, that the Indemnifying Party shall pay such expense if
representation of such Indemnified Party by the counsel retained by the
Indemnifying Party would be inappropriate due to actual or potential differing
interests between the Indemnified Party and any other party represented by such
counsel in such proceeding. No Indemnifying Party, in the defense of any such
claim or litigation shall, except with the consent of each Indemnified Party,
consent to entry of any judgment or enter into any settlement which does not
include as an unconditional term thereof the giving by the claimant or
plaintiff to such Indemnified Party of a release from all liability in respect
of such claim or litigation, and no Indemnified Party shall consent to entry of
any judgment or settle such claim or litigation without the prior written
consent of the Indemnifying Party.

 

(d)           In
order to provide for just and equitable contribution to joint liability under
the Securities Act in any case in which either (i) any holder of
Registrable Shares exercising rights under this Agreement, or any controlling
person of any such holder, makes a claim for indemnification pursuant to this
Article III, Section 5 but it is judicially determined (by the entry
of a final judgment or decree by a court of competent jurisdiction and the
expiration of

 

8

 

time to appeal or
the denial of the last right of appeal) that such indemnification may not be
enforced in such case notwithstanding the fact that this Article III,
Section 5 provides for indemnification in such case, or
(ii) contribution under the Securities Act may be required on the part of
any such selling Stockholder or any such controlling person in circumstances
for which indemnification is provided under this Article III,
Section 5; then, in each such case, the Company and such Stockholder will
contribute to the aggregate losses, claims, damages or liabilities to which
they may be subject (after contribution from others) in such proportions so
that such holder is responsible for the portion represented by the percentage
that the public offering price of its Registrable Shares offered by the
Registration Statement bears to the public offering price of all securities
offered by such Registration Statement, and the Company is responsible for the
remaining portion; provided, however, that, in any such case,
(A) no such holder will be required to contribute any amount in excess of
the net proceeds to it of all Registrable Shares sold by it pursuant to such
Registration Statement, and (B) no person or entity guilty of fraudulent
misrepresentation, within the meaning of Section 11(f) of the Securities
Act, shall be entitled to contribution from any person or entity who is not
guilty of such fraudulent misrepresentation.

 

6.             Indemnification with Respect to
Underwritten Offering. In the event that Registrable Shares are sold
pursuant to a Registration Statement in an underwritten offering, the Company
agrees to enter into an underwriting agreement containing customary
representations and warranties with respect to the business and operations of
an issuer of the securities being registered and customary covenants and
agreements to be performed by such issuer, including without limitation
customary provisions with respect to indemnification by the Company of the
underwriters of such offering.

 

7.             Information by Holder. Each
Stockholder including Registrable Shares in any registration shall furnish to
the Company such information regarding such Stockholder and the distribution
proposed by such Stockholder as the Company may reasonably request in writing
and as shall be required in connection with any registration, qualification or
compliance referred to in this Agreement.

 

8.             “Stand-Off” Agreement. Each
Stockholder, if requested by the Company and the managing underwriter of an
offering by the Company of Common Stock or other securities of the Company
pursuant to a Registration Statement, shall not sell publicly or otherwise
transfer or dispose of any Registrable Shares or other securities of the
Company held by such Stockholder for a specified period of time (not to exceed
180 days) following the effective date of such Registration Statement; provided,
that:

 

(a)           such
agreement shall only apply to the first Registration Statement covering Common
Stock to be sold by or on behalf of the Company to the public in an
underwritten offering; and

 

(b)           all
officers and directors of the Company and all selling stockholders in such
offering enter into similar agreements.

 

9.             Limitations on Subsequent
Registration Rights. The Company shall not, without the prior written
consent of Investors holding a majority of the Registrable Shares held by all

 

9

 

Investors, enter
into any agreement (other than this Agreement) with any holder or prospective
holder of any securities of the Company which would allow such holder or
prospective holder (a) to include securities of the Company in any
Registration Statement upon terms which are more favorable to such holder or
prospective holder than the terms on which holders of Registrable Shares may
include shares in such registration, or (b) to make a demand registration
which could result in such registration statement being declared effective
prior to May 19, 2007.

 

10.           Rule 144 Requirements. After
the earliest of (a) the closing of the sale of securities of the Company
pursuant to a Registration Statement, (b) the registration by the Company
of a class of securities under Section 12 of the Exchange Act, or
(c) the issuance by the Company of an offering circular pursuant to
Regulation A under the Securities Act, the Company agrees to:

 

(a)           comply
with the requirements of Rule 144(c) under the Securities Act with respect
to current public information about the Company;

 

(b)           use
its best efforts to file with the Commission in a timely manner all reports and
other documents required of the Company under the Securities Act and the
Exchange Act (at any time after it has become subject to such reporting
requirements); and

 

(c)           furnish
to any holder of Registrable Shares upon request (A) a written statement
by the Company as to its compliance with the requirements of said
Rule 144(c), and the reporting requirements of the Securities Act and the
Exchange Act (at any time after it has become subject to such reporting
requirements), (B) a copy of the most recent annual or quarterly report of
the Company, and (C) such other reports and documents of the Company as
such holder may reasonably request to avail itself of any similar rule or
regulation of the Commission allowing it to sell any such securities without
registration.

 

ARTICLE IV.  RIGHT OF FIRST REFUSAL

 

1.             Right of First Refusal.

 

(a)           The
Company shall not issue, sell or exchange, agree to issue, sell or exchange, or
reserve or set aside for issuance, sale or exchange, (i) any shares of its
Common Stock, (ii) any other equity securities of the Company, including,
without limitation, shares of preferred stock, (iii) any option, warrant
or other right to subscribe for, purchase or otherwise acquire any equity
securities of the Company, or (iv) any debt securities convertible into capital
stock of the Company (collectively, the “Offered Securities”), unless in each
such case the Company shall have first complied with Article IV of this
Agreement. The Company shall deliver to each Investor a written notice of any
proposed or intended issuance, sale or exchange of Offered Securities (the “Offer”),
which Offer shall (i) identify and describe the Offered Securities,
(ii) describe the price and other terms upon which they are to be issued,
sold or exchanged, and the number or amount of the Offered Securities to be
issued, sold or exchanged, (iii) identify the persons or entities, if
known, to which or with which the Offered Securities are to be offered, issued,
sold or exchanged, and (iv) offer to issue and sell to or exchange with such
Investor such portion of the Offered Securities as is equal to a fraction, the
numerator of which is the aggregate number of shares of Common Stock issued or
issuable upon conversion of the

 

10

 

Shares then held
by such Investor and the denominator of which is the total number of shares of
Common Stock issued or issuable upon conversion of all Shares then held by all
Investors (the “Pro Rata Share”), plus an additional portion of the Offered
Securities attributable to the Pro Rata Shares of other Investors as such
Investor shall indicate it will purchase or acquire should the other Investors
subscribe for less than their full Pro Rata Shares (the “Undersubscription
Amount”). Each Investor shall have the right, for a period of 20 days following
delivery of the Offer, to purchase or acquire, at the price and upon the other
terms specified in the Offer, the number or amount of Offered Securities
described above. The Offer by its terms shall remain open and irrevocable for
such 20-day period.

 

(b)           To
accept an Offer, in whole or in part, an Investor must deliver a written notice
to the Company prior to the end of the 20-day period of the Offer, setting
forth the portion of such Investor’s Pro Rata Share that such Investor elects
to purchase and if such Investor shall elect to purchase all of its Pro Rata
Share, the Undersubscription Amount, if any, that such Investor elects to
purchase (a “Notice of Acceptance”). If the Pro Rata Shares subscribed by all
Investors are less than the total of all of the Pro Rata Shares available for
purchase, each Investor who had set forth an Undersubscription Amount in its
Notice of Acceptance shall be entitled to purchase, in addition to the Pro Rata
Share subscribed for, the Undersubscription Amount it has subscribed for; provided,
however, that if the total Undersubscription Amounts subscribed for by
all Investors exceed the difference between the total of all the Pro Rata
Shares available for purchase and the Pro Rata Shares subscribed for (“Available
Undersubscription Amount”), each Investor who has subscribed for an
Undersubscription Amount shall be entitled to purchase only that portion of the
of the Available Undersubscription Amount as the Undersubscription Amount
subscribed for by such Investor bears to the total Undersubscription Amounts
subscribed for by all Investors, subject to rounding by the Board of Directors
to the extent it deems necessary.

 

(c)           The
Company shall have 90 days from the expiration of the 20-day period set forth in
Section 1(a) to issue, sell or exchange all or any part of such Offered
Securities as to which a Notice of Acceptance has not been given by the
Investors (the “Available Securities”), but only upon terms and conditions
which are not more favorable, in the aggregate, to the acquiring person or
persons or less favorable to the Company than those set forth in the Offer.

 

(d)           Upon
the closing of the issuance, sale or exchange of all or less than all the
Available Securities, the Investors shall acquire from the Company, and the
Company shall issue to the Investors, the number or amount of Offered
Securities specified in the Notices of Acceptance, upon the terms and
conditions specified in the Offer. The purchase by the Investors of any Offered
Securities is subject in all cases to the preparation, execution and delivery
by the Company and the Investors of a purchase agreement relating to such
Offered Securities reasonably satisfactory in form and substance to the
Investors and the Company.

 

(e)           Any
Offered Securities not acquired by the Investors or other persons in accordance
with Section 1(c) may not be issued, sold or exchanged until they are
again offered to the Investors under the procedures specified in this Article.

 

11

 

2.             Excluded Issuances. The
rights of the Investors under this Article IV shall not apply to:

 

(a)           Common
Stock issued as a stock dividend to holders of Common Stock or upon any
subdivision or combination of shares of Common Stock;

 

(b)           the
issuance of any shares of Common Stock upon conversion of outstanding shares of
convertible preferred stock;

 

(c)           shares
of Series E Preferred Stock issued at any Subsequent Closings as defined in the
Series E Purchase Agreement;

 

(d)           any
and all shares of the Company’s preferred stock issued in conformance with
Section 5A of clause B of the Company’s Certificate of Incorporation;

 

(e)           up
to 19,825,206 shares of Common Stock, either issued in the form of
restricted stock awards or options exercisable for Common Stock (subject to
appropriate adjustment for stock split, stock dividends, combinations and other
similar recapitalizations affecting such shares), plus such additional number
of shares as may be approved by a majority of the non-employee directors of the
Company, issued or issuable to officers, directors, consultants and employees
of the Company or any subsidiary pursuant to any plan, agreement or arrangement
approved by the Board of Directors of the Company;

 

(f)            securities
issued solely in consideration for the acquisition (whether by merger or
otherwise) by the Company or any of its subsidiaries of all or substantially
all of the stock or assets of any other entity;

 

(g)           shares
of Common Stock sold by the Company in an underwritten public offering pursuant
to an effective registration statement under the Securities Act; and

 

(h)           securities
issued to equipment lessors, commercial lenders or strategic partners, as
approved by a majority of the non-employee directors of the Company.

 

ARTICLE V.  GENERAL

 

1.             Termination. Article II
and Article IV of this Agreement shall terminate in their entirety upon
the earlier of (a) an Acquisition (as defined below), or (b) the
closing of an Initial Public Offering, or (c) the redemption of all Shares. An “Acquisition”
shall mean any (i) merger or consolidation which results in the voting
securities of the Company outstanding immediately prior thereto representing
immediately thereafter (either by remaining outstanding or by being converted
into voting securities of the surviving or acquiring entity) less than a
majority of the combined voting power of the voting securities of the Company
or such surviving or acquiring entity outstanding immediately after such merger
or consolidation, (ii) sale of all or substantially all the assets of the
Company or (iii) sale of shares of capital stock of the Company, in a
single transaction or series of related transactions, representing at least 80%
of the voting power of the voting securities of the Company.

 

12

 

2.             Transfer of Rights. This
Agreement, and the rights and obligations of an Investor hereunder, may be
assigned by such Investor to any person or entity which is an affiliate of such
Investor, which is a parent, spouse, child, uncle, aunt, brother or sister of
such Investor or a trust for their benefit, or to which at least
400,000 Shares, or Registrable Shares issuable upon conversion of
400,000 Shares, (or all of the Shares originally purchased hereunder by
such Investor, if less than 400,000 Shares), are transferred by such Investor,
and such transferee shall be deemed an “Investor” for purposes of this
Agreement; provided that the transferee provides written notice of such
assignment to the Company and agrees to be bound by the terms and conditions
set forth herein.

 

3.             Severability. The provisions
of this Agreement are severable, so that the invalidity or unenforceability of
any provision of this Agreement shall not affect the validity or enforceability
of any other term or provision of this Agreement, which shall remain in full
force and effect.

 

4.             Specific Performance. In
addition to any and all other remedies that may be available at law in the
event of any breach of this Agreement, the Investors and the Founders shall be entitled
to specific performance of the agreements and obligations of the other parties
hereunder and to such other injunctive or other equitable relief as may be
granted by a court of competent jurisdiction.

 

5.             Governing Law. This
Agreement shall be governed by, and construed and enforced in accordance with,
the laws of the State of Delaware (without reference to the conflicts of law
provisions thereof).

 

6.             Notices. All notices,
requests, consents, and other communications under this Agreement shall be in
writing and shall be delivered by hand, sent via a reputable nationwide
overnight courier service or mailed by first class certified or registered
mail, return receipt requested, postage prepaid:

 

If to the Company, at Starent Networks, Corp., 30
International Place, Tewksbury, MA 01876, Attn: President, or at such other
address or addresses as may have been furnished in writing by the Company to
the Purchasers, with a copy to Wilmer Cutler Pickering Hale and Dorr LLP,
60 State Street, Boston, MA 02109, Attn: 
Mark G. Borden, Esq.;

 

If to an Investor, at its or his address as set forth
on the signature page hereto, or at such other address or addresses as may have
been furnished in writing by such Investor to the Company, with a copy to
Goodwin Procter LLP, Exchange Place, 53 State Street, Boston, MA 02109,
Attn:  William J. Schnoor, Esq.

 

If to a Founder, at his address as set forth on the
signature page hereto, or at such other address or addresses as may have been
furnished by such Founder to the Company and the Investors.

 

Notices provided in accordance with this
Section 6 shall be deemed delivered upon personal delivery, one business
day after being sent via a reputable nationwide overnight courier service, or
three business days after deposit in the mail.

 

13

 

7.             Complete Agreement; Amendments.

 

(a)           This
Agreement constitutes the full and complete agreement of the parties hereto
with respect to the subject matter hereof and replaces the Existing Investor Rights
Agreement in its entirety.

 

(b)           This
Agreement may be amended, or any provision that may be waived, by a written
instrument signed by the Company and (i) Investors holding at least a majority
of the shares of Common Stock issued or issuable upon conversion of the Series
A Preferred Stock, and (ii) Investors holding at least a majority of the shares
of Common Stock issued or issuable upon conversion of the Series B Preferred
Stock and (iii) Investors holding at least a majority of the shares of Common Stock
issued or issuable upon conversion of the Series C Preferred Stock, (iv)
Investors holding at least a majority of the shares of Common Stock issued or
issuable upon conversion of the Series D Preferred Stock and (v) Investors
holding at least a majority of the shares of Common Stock issued or issuable
upon conversion of the Series E Preferred Stock; provided that this Agreement
may be amended or the observance of any term of this Agreement may be waived
with the consent of holders of less than all the Registrable Securities only in
a manner which applies to all such holders in the same fashion; and provided
further that (i) no consent shall be required for an amendment pursuant to
Section 11 below, and (ii) no amendment or waiver shall adversely affect the
rights of a Founder to be designated as a director under Article II or
adversely affect in a manner different than the Investors such Founder’s rights
under Section 2 of Article III, without the consent of such Founder. No
waivers of or exceptions to any term, condition or provision of this Agreement,
in any one or more instances, shall be deemed to be, or construed as, a further
or continuing waiver of any such term, condition or provision.

 

8.             Pronouns. Whenever the
content may require, any pronouns used in this Agreement shall include the
corresponding masculine, feminine or neuter forms, and the singular form of
nouns and pronouns shall include the plural, and vice versa.

 

9.             Counterparts. This Agreement
may be executed in any number of counterparts, each of which shall be deemed to
be an original, and all of which together shall constitute one Agreement
binding on all the parties hereto.

 

10.           Captions. Captions of sections
have been added only for convenience and shall not be deemed to be a part of this
Agreement.

 

11.           Addition of Purchasers. Each
purchaser of shares of Series E Preferred Stock of the Company under Section
2.2 of the Series E Purchase Agreement shall become a party to and an “Investor”
under this Agreement upon the closing of its purchase of shares of Series E
Preferred Stock thereunder and its execution of a counterpart signature page to
this Agreement.

 

12.           Aggregation of Purchasers. For
purposes of this Agreement, (a) Matrix Partners VI, L.P. (“Matrix”) and all
Purchasers affiliated with Matrix shall be treated as a collective entity,
having rights as if it owned the aggregate Shares owned by Matrix and each such
Purchaser, (b) North Bridge Venture Partners IV-A, L.P. (“North Bridge”) and
all Purchasers affiliated with North Bridge shall be treated as a collective
entity, having rights as if it owned the aggregate Shares owned by North Bridge
and each such Purchaser, (c) Highland Capital Partners 

 

14

 

V Limited Partnership (“Highland”)
and all Purchasers affiliated with Highland shall be treated as a collective
entity, having rights as if it owned the aggregate Shares owned by Highland and
each such Purchaser and (d) Focus Ventures II, L.P. (“Focus Ventures”) and all
Purchasers affiliated with Focus Ventures shall be treated as a collective
entity, having rights as if it owned the aggregate Shares owned by Focus
Ventures and each such Purchaser.

 

[Signature Pages to Follow]

 

15

 

IN WITNESS WHEREOF, this Agreement has been executed
as of the date first above written.

 

	
   

  	
  COMPANY:

  
	
   

  	
   

  
	
   

  	
  STARENT
  NETWORKS, CORP.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ Ashraf M.
  Dahod

  	
   

  
	
   

  	
   

  	
  Ashraf M. Dahod

  	
   

  
	
   

  	
   

  	
  President

  	
   

  

 

 

Signature Page to Fourth
Amended and Restated Investor Rights Agreement

 

 

	
   

  	
  INVESTORS:

  
	
   

  	
   

  	
   

  
	
   

  	
  FOCUS VENTURES
  II, L.P.

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  Focus Ventures
  Partners II, L.P.,

  
	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ James H.
  Boettcher

  	
   

  
	
   

  	
  Name: James H.
  Boettcher

  
	
   

  	
   

  	
   

  
	
   

  	
  FV Investors II
  QP, L.P.

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  Focus Ventures
  Partners II, L.P.,

  
	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ James H.
  Boettcher

  	
   

  
	
   

  	
  Name: James H.
  Boettcher

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  FV Investors II
  A, L.P.

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  Focus Ventures
  Partners II, L.P.,

  
	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ James H.
  Boettcher

  	
   

  
	
   

  	
  Name: James H.
  Boettcher

  

 

 

	
   

  	
  HIGHLAND CAPITAL
  PARTNERS V LIMITED

  PARTNERSHIP

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  Highland
  Management Partners V Limited Partnership

  
	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  Highland
  Management Partners V, Inc.,

  
	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ [ILLEGIBLE]

  	
   

  
	
   

  	
   

  	
  Authorized Officer

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  HIGHLAND CAPITAL
  PARTNERS V-B LIMITED

  PARTNERSHIP

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  Highland
  Management Partners V Limited Partnership,

  
	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  Highland
  Management Partners V, Inc., its General

  
	
   

  	
   

  	
  Partner

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ [ILLEGIBLE]

  	
   

  
	
   

  	
   

  	
  Authorized
  Officer

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  HIGHLAND
  ENTREPRENEURS’ FUND V LIMITED

  PARTNERSHIP

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  HEF V Limited
  Partnership,

  
	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  Highland
  Management Partners V, Inc.,

  
	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ [ILLEGIBLE]

  	
   

  
	
   

  	
   

  	
  Authorized
  Officer

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
  /s/ Robert Davis

  	
   

  
	
   

  	
  Robert Davis

  

 

 

	
   

  	
  MATRIX PARTNERS
  VI, L.P.

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  Matrix VI
  Management Co., LLC,

  
	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ [ILLEGIBLE]

  	
   

  
	
   

  	
  Name:

  	
   

  	
   

  
	
   

  	
  Title:

  	
  Managing Member

  
	
   

  	
   

  	
   

  
	
   

  	
  MATRIX VI
  PARALLEL PARTNERSHIP-A, L.P.

  
	
   

  	
   

  
	
   

  	
  By:

  	
  Matrix VI
  Management Co., LLC,

  
	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ [ILLEGIBLE]

  	
   

  
	
   

  	
  Name:

  	
   

  	
   

  
	
   

  	
  Title:

  	
  Managing Member

  
	
   

  	
   

  	
   

  
	
   

  	
  MATRIX VI
  PARALLEL PARTNERSHIP-B, L.P.

  
	
   

  	
   

  
	
   

  	
  By:

  	
  Matrix VI
  Management Co., LLC,

  
	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ [ILLEGIBLE]

  	
   

  
	
   

  	
  Name:

  	
   

  	
   

  
	
   

  	
  Title:

  	
  Managing Member

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  WESTON & CO.
  VI LLC, as Nominee

  
	
   

  	
  By:

  	
  Matrix Partners
  Management Services, L.P.,

  
	
   

  	
   

  	
  Sole Member

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  Matrix Partners
  Management Services GP, LLC, its

  
	
   

  	
   

  	
  General Partner

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ [ILLEGIBLE]

  	
   

  
	
   

  	
  Name:

  	
   

  	
   

  
	
   

  	
  Title:

  	
  Authorized
  Member

  
							

 

 

	
   

  	
  NORTH BRIDGE
  VENTURE PARTNERS IV-A, L.P.

  
	
   

  	
   

  
	
   

  	
  By:

  	
  North Bridge
  Venture Management IV, L.P.,

  
	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ Edward T.
  Anderson

  	
   

  
	
   

  	
   

  	
  Edward T.
  Anderson

  
	
   

  	
   

  	
  General Partner

  
	
   

  	
   

  	
   

  
	
   

  	
  NORTH BRIDGE
  VENTURE PARTNERS IV-B, L.P.

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  North Bridge
  Venture Management IV, L.P.,

  
	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ Edward T.
  Anderson

  	
   

  
	
   

  	
   

  	
  Edward T.
  Anderson

  
	
   

  	
   

  	
  General Partner

  
	
   

  	
   

  	
   

  
	
   

  	
  ITOCHU
  CORPORATION

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
   

  	
   

  
	
   

  	
  Name:

  	
   

  
	
   

  	
  Title:

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  SVIC #4 NEW
  TECHNOLOGY BUSINESS

  INVESTMENT LP

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
   

  	
   

  
	
   

  	
  Name:

  	
   

  
	
   

  	
  Title:

  	
   

  
						

 

 

	
   

  	
  NOORIL-IMAN, LP

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  Nooril-Iman
  Management, its General Partner

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ Ashraf M.
  Dahod

  	
   

  
	
   

  	
   

  	
  Ashraf M. Dahod

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  /s/ Ashraf M.
  Dahod

  	
   

  
	
   

  	
  Ashraf M. Dahod

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  /s/ Shamim A.
  Dahod

  	
   

  
	
   

  	
  Shamim A. Dahod

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  Kwabena Akufo

  
	
   

  	
   

  	
   

  
	
   

  	
  H&D
  INVESTMENTS 2000

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ [ILLEGIBLE]

  	
   

  
	
   

  	
   

  	
  General Partner

  
	
   

  	
   

  	
   

  
	
   

  	
  H&D
  INVESTMENTS 2001

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/ [ILLEGIBLE]

  	
   

  
	
   

  	
   

  	
  General Partner

  
	
   

  	
   

  	
   

  
	
   

  	
  LN FAMILY TRUST

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
   

  	
   

  
	
   

  	
   

  	
  Name:

  
	
   

  	
   

  	
  Title:

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  Amarjit Gill

  

 

 

	
   

  	
  FOUNDING
  STOCKHOLDERS:

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  /s/ Ashraf M.
  Dahod

  	
   

  
	
   

  	
  Ashraf M. Dahod

  
	
   

  	
  Address:

  	
  22 Carter Lane

  
	
   

  	
   

  	
  Andover, MA
  01810

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  /s/ Anthony
  Schoener

  	
   

  
	
   

  	
  Anthony Schoener

  
	
   

  	
  Address:

  	
  28 Constitution
  Drive

  
	
   

  	
   

  	
  Southboro, MA 01772

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