Document:

EX-4.1

 Exhibit 4.1 

BIOLASE, Inc. 
 and 

Computershare Inc. 
 and 

Computershare Trust Company, N.A., jointly as 

Warrant Agent 
 Amended and
Restated Warrant Agency Agreement 
 Dated as of July 21, 2020 

 AMENDED AND RESTATED WARRANT AGENCY AGREEMENT 

AMENDED AND RESTATED WARRANT AGENCY AGREEMENT, dated as of July 21, 2020 (“Agreement”), by and among BIOLASE, Inc., a
Delaware corporation (the “Company”), Computershare Inc., a Delaware corporation (“Computershare”), and its wholly-owned subsidiary, Computershare Trust Company, N.A., a federally chartered trust company (together
with Computershare, the “Warrant Agent”). 
 W I T N E S S E T H 

WHEREAS, the Company is engaged in a public rights offering (the “Offering”) pursuant to which the Company has distributed,
at no charge, non-transferable subscription rights to purchase units (the “Units”) to each of the Company’s holders of common stock (the “Common Stock”) and the holders
of warrants issued in a private placement transaction that was consummated on June 10, 2020 (the “June 2020 Warrants”) pursuant to an effective registration statement on Form S-1 (File No. 333-238914) (the “Registration Statement”); 
 WHEREAS, the Units consist of
shares of Series F Convertible Preferred Stock (the “Preferred Stock”) and warrants (collectively, the “Warrants”) to purchase shares of Common Stock, and the Company wishes to issue the Warrants in book entry form
entitling the respective holders of the Warrants to purchase an aggregate of up to 37,500,000 shares of Common Stock upon the terms and subject to the conditions hereinafter set forth; 

WHEREAS, the Preferred Stock and Warrants to be issued in connection with the Offering shall be immediately separable and will be issued
separately, but will be purchased together in the Offering; and 
 WHEREAS, the Company wishes the Warrant Agent to act on behalf of the
Company, and the Warrant Agent is willing so to act, in connection with the issuance, registration, transfer, exchange, exercise and replacement of the Warrants and, in the Warrant Agent’s capacity as the Company’s transfer agent, the
delivery of the Warrant Shares (as defined below). 
 NOW, THEREFORE, in consideration of the premises and the mutual agreements herein set
forth, the parties hereby agree as follows: 
 Section 1. Certain Definitions. For purposes of this Agreement, the following
terms have the meanings indicated: 
 (a) “Business Day” means any day except any Saturday, any Sunday, any day which is a
federal legal holiday in the United States or any day on which banking institutions in the State of New York are authorized or required by law or other governmental action to close. 

(b) “Close of Business” on any given date means 5:00 p.m., New York City time, on such
date; provided, however, that if such date is not a Business Day it means 5:00 p.m., New York City time, on the next succeeding Business Day. 

  
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 (c) “Person” means an individual, corporation, association, partnership,
limited liability company, joint venture, trust, unincorporated organization, government or political subdivision thereof or governmental agency or other entity. 

(d) “Warrant Certificate” means a certificate issued to a Holder (as defined below), representing such number of Warrant
Shares as is indicated therein in the form of Exhibit 1 to this Agreement. 
 (e) “Warrant Shares” means the shares of
Common Stock underlying the Warrants and issuable upon exercise of the Warrants. 
 All other capitalized terms used but not otherwise
defined herein shall have the meaning ascribed to such terms in the Warrant. 
 Section 2. Appointment of Warrant Agent. The
Company hereby appoints the Warrant Agent to act as agent for the Company in accordance with the express terms and conditions hereof, and the Warrant Agent hereby accepts such appointment. The Company may from time to time appoint a Co-Warrant Agent as it may, in its sole discretion, deem necessary or desirable upon ten (10) calendar days’ prior written notice to the Warrant Agent. The Warrant Agent shall have no duty to supervise,
and will in no event be liable for the acts or omissions of, any co-Warrant Agent. In the event the Company appoints one or more co-Warrant Agents, the respective duties
of the Warrant Agent and any co-Warrant Agent shall be delineated by the Company as the Company reasonably determines, provided that such duties and determination are consistent with the terms and provisions
of this Agreement and that contemporaneously with such appointment, if any, the Company shall notify the Warrant Agent in writing thereof. 

Section 3. Global Warrants. 

(a) The Warrants shall be initially issuable in book-entry form. Unless otherwise instructed by the Company, all of the Warrants shall
initially be represented by one or more book-entry form Warrants (the “Global Warrants”) deposited with the Warrant Agent and registered in the name of Cede & Co., a nominee of The Depository Trust Company (the
“Depositary”), or as otherwise directed by the Depositary. Ownership of beneficial interests in the Warrants shall be shown on, and the transfer of such ownership shall be effected through, records maintained by (i) the
Depositary or its nominee for each Global Warrant or (ii) institutions that have accounts with the Depositary (such institution, with respect to a Warrant in its account, a “Participant”). 

(b) If the Depositary subsequently ceases to make its book-entry settlement system available for the Warrants, the Company may instruct the
Warrant Agent in writing regarding other arrangements for book-entry settlement. In the event that the Warrants are not eligible for, or it is no longer necessary to have the Warrants available in, book-entry form, the Warrant Agent shall provide
written instructions to the Depositary to deliver to the Warrant Agent for cancellation each Global Warrant, and the Company shall instruct the Warrant Agent in writing to deliver to each Holder a Warrant Certificate. 

  
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 (c) A Holder has the right to elect at any time or from time to time a Warrant Exchange (as
defined below) pursuant to a Warrant Certificate Request Notice (as defined below). Upon written notice by a Holder to the Warrant Agent for the exchange of some or all of such Holder’s Global Warrants for a Warrant Certificate evidencing the
same number of Warrants, which request shall be in the form attached hereto as Annex A (a “Warrant Certificate Request Notice” and the date of delivery of such Warrant Certificate Request Notice by the Holder, the
“Warrant Certificate Request Notice Date” and the deemed surrender upon delivery by the Holder of a number of Global Warrants for the same number of Warrants evidenced by a Warrant Certificate, a “Warrant
Exchange”), the Warrant Agent shall promptly effect the Warrant Exchange and shall promptly issue and deliver to the Holder a Warrant Certificate for such number of Warrants in the name set forth in the Warrant Certificate Request Notice.
Such Warrant Certificate shall be dated the original issue date of the Warrants and shall be executed by an authorized signatory of the Company. In connection with a Warrant Exchange, the Company agrees to deliver, or to direct the Warrant Agent to
deliver, the Warrant Certificate to the Holder within three (3) Business Days of the Warrant Certificate Request Notice pursuant to the delivery instructions in the Warrant Certificate Request Notice (“Warrant Certificate Delivery
Date”). The Company covenants and agrees that, upon the date of delivery of the Warrant Certificate Request Notice, the Holder shall be deemed to be the holder of the Warrant Certificate and, notwithstanding anything to the contrary set
forth herein, the Warrant Certificate shall be deemed for all purposes to contain all of the terms and conditions of the Warrants evidenced by such Warrant Certificate and the terms of this Agreement (other than Section 3(c), which shall not
apply to the Warrants evidenced by a Warrant Certificate). 
 (d) The Company shall provide an opinion of counsel upon the consummation of
the Offering to set up a reserve of Warrant Shares for the outstanding Warrants. The opinion shall state that all Warrants or Warrant Shares, as applicable, are: “registered under the Securities Act of 1933, as amended (the “1933
Act”), or are exempt from such registration, and all appropriate state securities law filings have been made with respect to the warrants or shares or alternatively, that the securities are “covered securities” under
Section 18 of the 1933 Act; and validly issued, fully paid and non-assessable.” 

Section 4. Form of Warrant. The Warrants, together with the form of election to purchase Common Stock (the “Exercise
Notice”) and the form of assignment to be printed on the reverse thereof, whether a Warrant Certificate or a Global Warrant, shall be substantially in the form of Exhibit 1 hereto. 

Section 5. Countersignature and Registration. The Warrant Certificates shall be executed on behalf of the Company by its Chief
Executive Officer or Principal Financial Officer, either manually or by facsimile signature. The Warrant Certificates shall be countersigned by the Warrant Agent either manually or by facsimile signature and shall not be valid for any purpose unless
so countersigned. In case any officer of the Company who shall have signed a Warrant Certificate shall cease to be such officer of the Company before countersignature by the Warrant Agent and issuance and delivery by the Company, such Warrant
Certificate, nevertheless, may be countersigned by the Warrant Agent, issued and delivered with the same force and effect as though the person who signed such Warrant Certificate had not ceased to be such officer of the Company; and any Warrant
Certificate may be signed on behalf of the Company by any person who, at the actual date of the execution of such Warrant Certificate, shall be a proper officer of the Company to sign such Warrant Certificate, although at the date of the execution
of this Agreement any such person was not such an officer. 

  
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 The Warrant Agent will keep or cause to be kept, at one of its offices, or at the office of
one of its agents, books for registration of original issuance and the registration of transfer of the Warrants issued hereunder (the “Warrant Register”). Such books shall show the names and addresses of the respective holders of
the Warrants (the “Holders” which term shall include transferees, successors and assignees under the terms hereunder and, if the Warrants are held in “street name,” a Participant), the number of Warrant Shares evidenced by
each Global Warrant or on the face of each Warrant Certificate and the date of each of such Warrant Certificate or Global Warrant. Any Person in whose name ownership of a beneficial interest in the Warrants evidenced by a Global Warrant is recorded
in the records maintained by the Depository or its nominee shall be deemed the “beneficial owner” thereof, provided that all such beneficial interests shall be held through a Participant, which shall be the registered holder of such
Warrants. 
 Prior to due presentment for registration of transfer of any Warrant Certificate, the Warrant Agent may deem and treat the
Person in whose name that Warrant shall be registered on the Warrant Register as the absolute owner of such Warrant for purposes of any exercise thereof, and for all other purposes. The Warrant Agent shall not be affected by any notice to the
contrary. Notwithstanding the foregoing, nothing herein shall prevent the Warrant Agent or any agent of the Warrant Agent from giving effect to any written certification, proxy or other authorization furnished by the Depository governing the
exercise of the rights of a holder of a beneficial interest in any Warrant. The rights of beneficial owners in a Warrant evidenced by the Global Warrant shall be exercised by the Holder or a Participant through the Depository’s system, except
to the extent expressly set forth herein. 
 Section 6. Transfer, Split Up, Combination and Exchange of Warrant Certificates;
Mutilated, Destroyed, Lost or Stolen Warrant Certificates. Subject to the provisions of the Warrant and the last sentence of this first paragraph of Section 6 and subject to applicable law, rules or regulations, or any “stop
transfer” instructions the Company may give to the Warrant Agent in writing, at any time after the closing date of the Offering, and at or prior to the Close of Business on the Termination Date, any Warrant Certificate or Warrant Certificates
may be transferred, split up, combined or exchanged for another Warrant Certificate or Warrant Certificates, entitling the Holder to purchase a like number of shares of Common Stock as the Warrant Certificate or Warrant Certificates surrendered then
entitled such Holder to purchase. Any Holder desiring to transfer, split up, combine or exchange any Warrant Certificate shall make such request in writing delivered to the Warrant Agent, and shall surrender the Warrant Certificate or Warrant
Certificates to be transferred, split up, combined or exchanged at the office of the Warrant Agent designated for such purposes. Any requested transfer of Warrants represented by a Warrant Certificate, shall be accompanied by reasonable evidence of
authority of the party making such request that may be required by the Warrant Agent including but not limited to, the signature guarantee of a guarantor institution which is a participant in a signature guarantee program approved by the Securities
Transfer Association. Thereupon the Warrant Agent shall, subject to the last sentence of this first paragraph of Section 6, countersign and deliver to the Person entitled thereto any Warrant Certificate as so requested. The Company may require
payment from the Holder of a sum sufficient to cover any tax or governmental charge that may be imposed in connection with any transfer, split up, combination or exchange of Warrants. The Warrant Agent shall not have any duty or obligation to take
any action under any section of this Agreement that requires the payment of taxes and/or charges unless and until it is satisfied that all such payments have been made. 

  
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 Upon receipt by the Warrant Agent of evidence reasonably satisfactory to it of the loss,
theft, destruction or mutilation of a Warrant Certificate, which evidence shall include an affidavit of loss, or in the case of mutilated certificates, the certificate or portion thereof remaining, and, in case of loss, theft or destruction, of
indemnity in customary form and amount satisfactory to the Warrant Agent, and satisfaction of any other reasonable requirements established by established by Section 8-405 of the Uniform Commercial Code
as in effect in the State of Delaware, and reimbursement to the Company and the Warrant Agent of all reasonable expenses incidental thereto, and upon surrender to the Warrant Agent and cancellation of the Warrant Certificate if mutilated, the
Company will make and deliver a new Warrant Certificate of like tenor to the Warrant Agent for delivery to the Holder in lieu of the Warrant Certificate so lost, stolen, destroyed or mutilated. Notwithstanding anything herein to the contrary, in
connection with a Warrant in book entry or electronic form held through the Depositary, no posting of a bond shall be required under this Section 6. 

Section 7. Exercise of Warrants; Exercise Price; Termination Date. 

(a) The Warrants shall be exercisable commencing on the Initial Exercise Date. The Warrants shall cease to be exercisable and shall terminate
and become void, and all rights thereunder and under this Agreement shall cease, at or prior to the Close of Business on the Termination Date. Subject to the foregoing and to Section 7(b) below, the Holder of a Warrant may exercise the Warrant
in whole or in part upon providing the items required by Section 7(c) below to the Warrant Agent at the office of the Warrant Agent designated for such purposes or to the office of one of its agents as may be designated by the Warrant Agent
from time to time. In the case of the Holder of a Warrant Certificate, the Holder shall deliver the executed Exercise Notice and payment of the Exercise Price pursuant to Section 2(a) of the Warrant. Notwithstanding any other provision in this
Agreement, a holder whose interest in a Global Warrant is a beneficial interest in a Global Warrant held in book-entry form through the Depositary (or another established clearing corporation performing similar functions and subject to registration
under the Securities Exchange Act of 1934, as amended), shall effect exercises by delivering to the Depositary (or such other clearing corporation, as applicable) the appropriate instruction form for exercise, complying with the procedures to effect
exercise that are required by the Depositary (or such other clearing corporation, as applicable). The Company acknowledges that the bank accounts maintained by the Warrant Agent in connection with the services provided under this Agreement will be
in Computershare’s name, as agent for the Company, and that the Warrant Agent may receive investment earnings in connection with the investment at Warrant Agent risk and for its benefit of funds (the “Funds”) held in those
accounts from time to time. Until paid pursuant to the terms of this Agreement, Computershare will hold the Funds through such accounts in: deposit accounts of commercial banks with Tier 1 capital exceeding $1 billion or with an average rating
above investment grade by S&P (LT Local Issuer Credit Rating), Moody’s (Long Term Rating) and Fitch Ratings, Inc. (LT Issuer Default Rating) (each as reported by Bloomberg Finance L.P.). Computershare shall have no responsibility or
liability for any diminution of the Funds that may result from any deposit made by Computershare in accordance with this paragraph, including any losses resulting from a default by any bank, financial institution or other third
party. Computershare may from time to time receive interest, dividends or other earnings in connection with such deposits. Computershare shall not be obligated to pay such interest, dividends or earnings to the Company, any holder or any
other party. 

  
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 (b) Upon receipt of an Exercise Notice for a cashless exercise pursuant to Section 2(c)
of the Warrant (each, a “Cashless Exercise”), the Warrant Agent will promptly notify the Company and the Company will promptly calculate and transmit to the Warrant Agent the number of Warrant Shares issuable in connection with such
Cashless Exercise and deliver a copy of the Exercise Notice to the Warrant Agent, which shall issue such number of Warrant Shares in connection with such Cashless Exercise. The Warrant Agent shall have no obligation under this Agreement to
calculate, the number of shares of Common Stock to be issued on a Cashless Exercise, which will be determined by the Company (with written notice thereof to the Warrant Agent) using the formula set forth in Section 2(c) of the Warrant. The
Warrant Agent shall have no duty or obligation to investigate or confirm whether the Company’s determination of the number of shares of Common Stock to be issued on such exercise, pursuant to Section 2(c) of the Warrant, is accurate or
correct. 
 (c) Upon the exercise of the Warrant Certificate pursuant to the terms of Section 2 of the Warrant Certificate, accompanied
by such other documentation as the Warrant Agent may reasonably request, the Warrant Agent shall cause the Warrant Shares underlying such Warrant Certificate or Global Warrant to be delivered to or upon the order of the Holder of such Warrant
Certificate or Global Warrant, registered in such name or names as may be designated by such Holder, no later than the Warrant Share Delivery Date (as such term is defined in the Warrant Certificate). If the Company is then a participant in the DWAC
system of the Depositary and either (A) there is an effective registration statement permitting the issuance of the Warrant Shares to or resale of the Warrant Shares by Holder or (B) the Warrant is being exercised via Cashless Exercise,
then the certificates for Warrant Shares shall be transmitted by the Warrant Agent to the Holder by crediting the account of the Holder’s broker with the Depositary through its DWAC system. For the avoidance of doubt, if the Company becomes
obligated to pay any amounts to any Holders pursuant to Section 2(d)(i) or 2(d)(iv) of the Warrant Certificate, such obligation shall be solely that of the Company and not that of the Warrant Agent. Notwithstanding anything else to the contrary
in this Agreement, except in the case of a Cashless Exercise, if any Holder fails to duly deliver payment to the Warrant Agent of an amount equal to the aggregate Exercise Price of the Warrant Shares to be purchased upon exercise of such
Holder’s Warrant as set forth in Section 7(a) hereof by the Warrant Share Delivery Date, the Warrant Agent will not obligated to deliver such Warrant Shares (via DWAC or otherwise) until following receipt of such payment, and the
applicable Warrant Share Delivery Date shall be deemed extended by one day for each day (or part thereof) until such payment is delivered to the Warrant Agent. For purposes of clarity, the Company and Warrant Agent acknowledge and agree that, with
respect to the terms of the Warrants, the Warrant Certificate or Global Warrant shall set forth the terms of the Warrants and, in the event of any conflict between the Warrant Certificate or the Global Warrant and this Agreement, the Warrant
Certificate or the Global Warrant shall control; provided, however, that all provisions with respect to the rights, duties, obligations, protections, immunities and liability of the Warrant Agent only shall be determined and interpreted solely by
the provisions of this Agreement and, except as related to the rights, duties, obligations, protections, immunities and liability of the Warrant Agent, no provision of this Agreement shall affect or limit the obligations of the Company under the
Warrant in respect of any other Person. 
 (d) The Warrant Agent shall deposit all funds received by it in payment of the Exercise Price for
all Warrants in the account of the Company maintained with the Warrant Agent for such purpose and shall advise the Company via telephone at the end of each day on which funds for the exercise of any Warrant are received of the amount so deposited to
its account. The Warrant Agent shall promptly confirm such telephonic advice to the Company in writing. 

  
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 (e) In case the Holder of any Warrant Certificate exercises fewer than all Warrants
evidenced thereby and surrenders such Warrant Certificate in connection with such partial exercise, a new Warrant Certificate evidencing the number of Warrant Shares equivalent to the number of Warrant Shares remaining unexercised may be issued by
the Warrant Agent to the Holder of such Warrant Certificate or to his duly authorized assigns in accordance with Section 2(d)(ii) of the Warrant, subject to the provisions of Section 6 hereof. 

(f) In the event of a cash exercise, the Company hereby instructs the Warrant Agent to record cost basis for newly issued shares in a manner to
be subsequently communicated by the Company in writing to the Warrant Agent. In the event of a Cashless Exercise, the Company shall provide cost basis for shares issued pursuant to a Cashless Exercise at the time the Company confirms the number of
Warrant Shares issuable in connection with the Cashless Exercise to the Warrant Agent pursuant to Section 7(a) hereof 
 (g)
Notwithstanding anything to the contrary contained herein, upon giving irrevocable instructions to its Participant to exercise Warrants, solely for purposes of Regulation SHO, the holder whose interest in the Warrant is a beneficial interest shall
be deemed to have exercised such Warrant, regardless of when the applicable Warrant Shares are delivered to such holder. . 

Section 8. Cancellation and Destruction of Warrant Certificates. All Warrant Certificates surrendered for the purpose of exercise,
transfer, split up, combination or exchange shall, if surrendered to the Company or to any of its agents, be delivered to the Warrant Agent for cancellation or in canceled form, or, if surrendered to the Warrant Agent, shall be canceled by it, and
no Warrant Certificates shall be issued in lieu thereof except as expressly permitted by any of the provisions of this Agreement or the Warrants. The Company shall deliver to the Warrant Agent for cancellation and retirement, and the Warrant Agent
shall so cancel and retire, any other Warrant Certificate purchased or acquired by the Company otherwise than upon the exercise thereof. The Warrant Agent shall deliver all canceled Warrant Certificates to the Company, or shall, at the written
request of the Company, destroy such canceled Warrant Certificates, and in such case shall deliver a certificate of destruction thereof to the Company, subject to any applicable law, rule or regulation requiring the Warrant Agent to retain such
canceled certificates. 
 Section 9. Certain Representations; Reservation and Availability of Shares of Common Stock or Cash. 

(a) This Agreement has been duly authorized, executed and delivered by the Company and, assuming due authorization, execution and delivery
hereof by the Warrant Agent, constitutes a valid and legally binding obligation of the Company enforceable against the Company in accordance with its terms, and the Warrants have been duly authorized, executed and issued by the Company and, assuming
due registration thereof by the Warrant Agent pursuant hereto and payment therefor by the Holders as provided in the Registration Statement, constitute valid and legally binding obligations of the Company enforceable against the Company in
accordance with their terms and entitled to the benefits thereof; in each case except as enforceability may be limited by bankruptcy, insolvency, reorganization, moratorium and other similar laws relating to or affecting creditors’ rights
generally or by general equitable principles (regardless of whether such enforceability is considered in a proceeding in equity or at law). 

  
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 (b) As of the date hereof and prior to the Offering, the authorized capital stock of the
Company consists of (i) 180,000,000 shares of Common Stock, of which 50,342,130 shares of Common Stock are issued and outstanding, and (ii) 1,000,000 shares of preferred stock, par value $0.001 per share, and none of which is issued and outstanding.
As of the date hereof, 37,500,000 shares of Common Stock are reserved for issuance upon exercise of the Warrants. Except as disclosed in the Registration Statement, there are no other outstanding obligations, warrants, options or other rights
to subscribe for or purchase from the Company any class of capital stock of the Company. 
 (c) The Company covenants and agrees that it will
cause to be reserved and kept available out of its authorized and unissued shares of Common Stock or its authorized and issued shares of Common Stock held in its treasury, free from preemptive rights, the number of shares of Common Stock that will
be sufficient to permit the exercise in full of all outstanding Warrants. 
 (d) [Intentionally Omitted]. 

(e) The Company further covenants and agrees that it will pay when due and payable any and all federal and state transfer taxes and charges
which may be payable in respect of the original issuance or delivery of the Warrant Certificates or certificates evidencing Common Stock upon exercise of the Warrants. The Company shall not, however, be required to pay any tax or governmental charge
which may be payable in respect of any transfer involved in the transfer or delivery of Warrant Certificates or the issuance or delivery of certificates for Common Stock in a name other than that of the Holder of the Warrant Certificate evidencing
Warrants surrendered for exercise or to issue or deliver or cause to be issued or delivered, any certificate for shares of Common Stock upon the exercise of any Warrants until any such tax or governmental charge shall have been paid (any such tax or
governmental charge being payable by the Holder of such Warrant Certificate at the time of surrender) or until it has been established to the Company’s or the Warrant Agent’s reasonable satisfaction that no such tax or governmental charge
is due. 
 Section 10. Common Stock Record Date. Each Holder shall be deemed to have become the holder of record for the Warrant
Shares pursuant to Section 2(d)(i) of the Warrants. 
 Section 11. Adjustment of Exercise Price, Number of Shares of Common
Stock or Number of the Company Warrants. The Exercise Price, the number of shares covered by each Warrant and the number of Warrants outstanding are subject to adjustment from time to time as provided in Section 3 of the Warrant
(“Adjustment Events”). In the event that at any time, as a result of an adjustment made pursuant to Section 3 of the Warrant, the Holder of any Warrant thereafter exercised shall become entitled to receive any shares of capital
stock of the Company other than shares of Common Stock, thereafter the number of such other shares so receivable upon exercise of any Warrant shall be subject to adjustment from time to time in a manner and on terms as nearly equivalent as
practicable to the provisions with respect to the shares contained in Section 3 of the Warrant, and the provisions of Sections 7, 9 and 13 of this Agreement with respect to the 

  
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shares of Common Stock shall apply on like terms to any such other shares. All Warrants originally issued by the Company subsequent to any adjustment made to the Exercise Price pursuant to the
Warrant shall evidence the right to purchase, at the adjusted Exercise Price, the number of shares of Common Stock purchasable from time to time hereunder upon exercise of the Warrants, all subject to further adjustment as provided herein. The
Company hereby agrees that it will provide the Warrant Agent with reasonable notice of Adjustment Events. The Warrant Agent shall have no obligation under any Section of this Agreement to determine whether an Adjustment Event has occurred or to
calculate any of the adjustments set forth herein. 
 Section 12. Certification of Adjusted Exercise Price or Number of Shares of
Common Stock. Whenever the Exercise Price or the number of shares of Common Stock issuable upon the exercise of each Warrant is adjusted as provided in Section 11 or 13, the Company shall (a) promptly prepare a certificate setting
forth the Exercise Price of each Warrant as so adjusted, and a brief, detailed statement of the facts accounting for such adjustment, and (b) promptly file with the Warrant Agent and with each transfer agent for the Common Stock a copy of such
certificate. The Company may instruct the Warrant Agent to send a notice including such brief, detailed statement of the facts accounting for the adjustment and a brief summary of any new or amended exercise terms to each Holder of a Warrant. If the
Company requests the Warrant Agent to send such notices, it shall provide the Warrant Agent with a draft notice to be used for this purpose. The Warrant Agent shall be fully protected in relying on any such certificate and on any adjustment or
statement therein contained and shall have no duty or liability with respect to, and shall not be deemed to have knowledge of any such adjustment or any such event unless and until it shall have received such certificate. 

Section 13. Fractional Shares of Common Stock. 

(a) The Company shall not issue Warrants representing fractional shares or distribute a Global Warrant or Warrant Certificate that evidences
fractional shares. Whenever any Warrant representing fractional shares would otherwise be required to be issued or distributed, the actual issuance or distribution shall reflect a rounding of such fraction in accordance with Section 2(d)(v) of
the Warrant. 
 (b) The Company shall not issue fractions of shares of Common Stock upon exercise of Warrants or distribute stock
certificates that evidence fractional shares of Common Stock. Whenever any fraction of a share of Common Stock would otherwise be required to be issued or distributed, the actual issuance or distribution in respect thereof shall be made in
accordance with Section 2(d)(v) of the Warrant. 
 Section 14. Conditions of the Warrant Agent’s Obligations. The
Warrant Agent accepts its obligations herein set forth upon the express terms and conditions hereof, including the following to all of which the Company agrees and to all of which the rights hereunder of the Holders from time to time of the Warrant
shall be subject: 
 (a) Compensation and Indemnification. The Company agrees promptly to pay the Warrant Agent the compensation in
accordance with a fee schedule to be mutually agreed upon for all services rendered by the Warrant Agent and to reimburse the Warrant Agent for reasonable out-of-pocket
expenses (including reasonable counsel fees) incurred in the preparation, delivery, 

  
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negotiation, amendment, administration and execution of this Agreement and the exercise and performance of its duties hereunder. The Company covenants and agrees to indemnify and to hold the
Warrant Agent harmless against, any and all loss, liability, damage, judgment, fine, penalty, claim, demand, settlement, cost or expense (including, without limitation, the reasonable fees and expenses of legal counsel) that may be paid, incurred or
suffered by it, or which it may become subject, without gross negligence, bad faith or willful misconduct on the part of the Warrant Agent (which gross negligence, bad faith, or willful misconduct must be determined by a final, non-appealable judgment of a court of competent jurisdiction), for any action taken, suffered, or omitted to be taken by the Warrant Agent in connection with the execution, acceptance, administration, exercise and
performance of its duties under this Agreement, including the costs and expenses of defending against any claim of liability arising therefrom, directly or indirectly, or enforcing its rights hereunder. Notwithstanding anything contained herein to
the contrary, the Warrant Agent’s aggregate liability to the Company during any term of this Agreement with respect to, arising from, or arising in connection with this Agreement, or from all services provided or omitted to be provided under
this Agreement, whether in contract, or in tort, or otherwise, is limited to, and shall not exceed, the amounts paid hereunder by the Company to Warrant Agent as fees and charges, but not including reimbursable expenses, during the twelve
(12) months immediately preceding the event for which recovery from Warrant Agent is being sought. The obligations of the Company set forth in this paragraph and the rights and immunities of the Warrant Agent under this Section 14 shall
survive the termination of this Agreement and the resignation or removal of the Warrant Agent. 
 (b) Agent for the Company. In acting under
this Agreement and in connection with the Warrant Certificates, the Warrant Agent is acting solely as agent of the Company and does not assume any obligations or relationship of agency or trust for or with any of the Holders of Warrant Certificates
or beneficial owners of Warrants. 
 (c) Counsel. The Warrant Agent may consult with counsel satisfactory to it, which may include counsel
for the Company, and the advice or opinion of such counsel shall be full and complete authorization and protection in respect of any action taken, suffered or omitted by it hereunder in the absence of bad faith and in accordance with the advice or
opinion of such counsel. 
 (d) Documents. The Warrant Agent shall be protected and shall incur no liability for or in respect of any action
taken or omitted by it in reliance upon any Warrant Certificate, notice, direction, consent, certificate, affidavit, statement or other paper or document reasonably believed by it to be genuine and to have been presented or signed by the proper
parties. 
 (e) Certain Transactions. The Warrant Agent, and its officers, directors and employees, may become the owner of, or acquire any
interest in, the Warrants, with the same rights that it or they would have if it were not the Warrant Agent hereunder, and, to the extent permitted by applicable law, it or they may engage or be interested in any financial or other transaction with
the Company and may act on, or as depositary, trustee or agent for, any committee or body of Holders of Warrants or other obligations of the Company as freely as if it were not the Warrant Agent hereunder. Nothing in this Agreement shall be deemed
to prevent the Warrant Agent from acting as trustee under any indenture to which the Company is a party. Nothing herein shall preclude the Warrant Agent from acting in any other capacity for the Company or for any other legal entity. 

  
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 (f) No Liability for Interest. Unless otherwise agreed with the Company, the Warrant Agent
shall have no liability for interest on any monies at any time received by it pursuant to any of the provisions of this Agreement or of the Warrant Certificates. 

(g) No Liability for Invalidity. The Warrant Agent shall have no liability with respect to any invalidity of this Agreement or any of the
Warrant Certificates (except as to the Warrant Agent’s countersignature thereon). 
 (h) No Responsibility for Representations. The
Warrant Agent shall not be responsible for any of the recitals, statement of facts or representations herein or in the Warrant Certificates (except as to the Warrant Agent’s countersignature thereon) or be required to verify the same, all of
which are made solely by the Company. 
 (i) (i) No Implied Obligations. The Warrant Agent shall be obligated to perform only such duties as
are herein and in the Warrants specifically set forth and no implied duties or obligations shall be read into this Agreement or the Warrants against the Warrant Agent. The Warrant Agent shall not be under any obligation to take any action hereunder
which may tend to involve it in any expense or liability, the payment of which within a reasonable time or adequate indemnification is not, in its reasonable opinion, assured to it. The Warrant Agent shall not be accountable or under any duty or
responsibility for the use by the Company of any of the Warrants authenticated by the Warrant Agent and delivered by it to the Company pursuant to this Agreement or for the application by the Company of the proceeds of the Warrants. The Warrant
Agent shall have no duty or responsibility in case of any default by the Company in the performance of its covenants or agreements contained herein or in the Warrants or in the case of the receipt of any written demand from a Holder of a Warrant
with respect to such default, including, without limiting the generality of the foregoing, any duty or responsibility to initiate or attempt to initiate any proceedings at law. 

Section 15. Purchase or Consolidation or Change of Name of Warrant Agent. Any Person into which the Warrant Agent or any successor
Warrant Agent may be merged or with which it may be consolidated, or any Person resulting from any merger or consolidation to which the Warrant Agent or any successor Warrant Agent shall be party, or any Person succeeding to the corporate trust,
stock transfer or shareholder services business of the Warrant Agent or any successor Warrant Agent, shall be the successor to the Warrant Agent under this Agreement without the execution or filing of any paper or any further act on the part of any
of the parties hereto, provided that such corporation would be eligible for appointment as a successor Warrant Agent under the provisions of Section 17. In case at the time such successor Warrant Agent shall succeed to the agency created by
this Agreement any of the Warrants shall have been countersigned but not delivered, any such successor Warrant Agent may adopt the countersignature of the predecessor Warrant Agent and deliver such Warrants so countersigned; and in case at that time
any of the Warrants shall not have been countersigned, any successor Warrant Agent may countersign such Warrants either in the name of the predecessor Warrant Agent or in the name of the successor Warrant Agent; and in all such cases such Warrants
shall have the full force provided in the Warrants and in this Agreement. 

  
 12 

 In case at any time the name of the Warrant Agent shall be changed and at such time any of
the Warrants shall have been countersigned but not delivered, the Warrant Agent may adopt the countersignature under its prior name and deliver Warrants so countersigned; and in case at that time any of the Warrants shall not have been
countersigned, the Warrant Agent may countersign such Warrants either in its prior name or in its changed name; and in all such cases such Warrants shall have the full force provided in the Warrants and in this Agreement. 

Section 16. Duties of Warrant Agent. The Warrant Agent undertakes the duties and obligations imposed by this Agreement upon the
following express terms and conditions, by all of which the Company, by its acceptance hereof, shall be bound: 
 (a) Whenever in the
performance of its duties under this Agreement the Warrant Agent shall deem it necessary or desirable that any fact or matter be proved or established by the Company prior to taking or suffering any action hereunder, such fact or matter (unless
other evidence in respect thereof be herein specifically prescribed) may be deemed to be conclusively proved and established by a certificate signed by the Chief Executive Officer or Principal Financial Officer of the Company; and such certificate
shall be full authentication to the Warrant Agent for any action taken or suffered by it under the provisions of this Agreement in reliance upon such certificate. The Warrant Agent shall not be liable and shall be indemnified by the Company for any
action taken or omitted by the Warrant Agent in reliance upon any such Company certificate. The Warrant Agent shall not be held to have notice of any change of authority of any person until receipt of written notice thereof from the Company. 

(b) Subject to Section 29, the Warrant Agent shall be liable hereunder only for its own gross negligence, bad faith or willful misconduct
(which gross negligence, bad faith and willful misconduct must be determined by a final non-appealable judgment of a court of competent jurisdiction). 

(c) The Warrant Agent shall not be under any responsibility in respect of the validity of this Agreement or the execution and delivery hereof
(except the due execution hereof by the Warrant Agent) or in respect of the validity or execution of any Warrant (except its countersignature thereof); nor shall it be responsible for any breach by the Company of any covenant or condition contained
in this Agreement or in any Warrant; nor shall it be responsible for the adjustment of the Exercise Price or the making of any change in the number of shares of Common Stock required under the provisions of Section 11 or 13 or responsible for
the manner, method or amount of any such change or the ascertaining of the existence of facts that would require any such adjustment or change (but not limiting the Warrant Agent’s duties herein set forth upon the exercise of Warrants evidenced
by Warrant Certificates after actual notice of any adjustment of the Exercise Price); nor shall it by any act hereunder be deemed to make any representation or warranty as to the authorization or reservation of any shares of Common Stock to be
issued pursuant to this Agreement or any Warrant or as to whether any shares of Common Stock will, when issued, be duly authorized, validly issued, fully paid and nonassessable. 

  
 13 

 (d) From time to time, the Chief Executive Officer or Principal Financial Officer of the
Company may provide Warrant Agent with instructions concerning the services performed by the Warrant Agent hereunder. In addition, at any time Warrant Agent may apply to these officers for instruction, and may consult with legal counsel for Warrant
Agent or Company with respect to any matter arising in connection with the services to be performed by the Warrant Agent under this Agreement. Warrant Agent and its agents and subcontractors shall not be liable and shall be indemnified by Company
for any action taken or omitted by Warrant Agent in reliance upon any Company instructions or upon the advice or opinion of such counsel. Warrant Agent shall not be held to have notice of any change of authority of any person, until receipt of
written notice thereof from Company. 
 (e) The Warrant Agent may execute and exercise any of the rights or powers hereby vested in it or
perform any duty hereunder either itself or by or through its attorney or agents, and the Warrant Agent shall not be answerable or accountable for any act, default, neglect or misconduct of any such attorney or agents or for any loss to the Company
resulting from any such act, default, neglect or misconduct, provided reasonable care was exercised in the selection and continued employment thereof. 

(f) The Warrant Agent shall forward funds received for Warrant exercises by the fifth Business Day of the following month after such funds are
received by the Warrant Agent by wire transfer to an account designated by the Company. 
 (g) This Section 16 shall survive the
termination of this Agreement and the resignation or removal of the Warrant Agent. 
 Section 17. Change of Warrant Agent. The
Warrant Agent may resign and be discharged from its duties under this Agreement upon 30 days’ notice in writing sent to the Company and, and in the event that the Warrant Agent or one of its affiliates is not also the transfer agent for the
Common Stock, to each transfer agent of the Common Stock known to the Warrant Agent, and to the Holders of the Warrant Certificates. In the event the transfer agency relationship in effect between the Company and the Warrant Agent terminates, the
Warrant Agent will be deemed to have resigned automatically and be discharged from its duties under this Agreement as of the effective date of such termination, and the Company shall be responsible for sending any required notice prescribed in this
Section 17. The Company may remove the Warrant Agent or any successor Warrant Agent upon 30 days’ notice in writing, sent to the Warrant Agent or successor Warrant Agent, as the case may be, and to each transfer agent of the Common Stock,
and to the Holders of the Warrant Certificates. If the Warrant Agent shall resign or be removed or shall otherwise become incapable of acting, the Company shall appoint a successor to the Warrant Agent. If the Company shall fail to make such
appointment within a period of 30 days after such removal or after it has been notified in writing of such resignation or incapacity by the resigning or incapacitated Warrant Agent or by the Holder of a Warrant Certificate (who shall, with such
notice, submit his Warrant Certificate for inspection by the Company), then the Holder of any Warrant Certificate may apply to any court of competent jurisdiction for the appointment of a new Warrant Agent. Any successor Warrant Agent, whether
appointed by the Company or by such a court, shall be an entity organized and doing business under the laws of the United States or of a state thereof, in good standing, which is authorized under such laws to exercise stock transfer powers and is
subject to supervision or examination by federal or state authority and which has at 

  
 14 

 
the time of its appointment as Warrant Agent (along with its affiliates) a combined capital and surplus of at least $50,000,000. After appointment, the successor Warrant Agent shall be vested
with the same powers, rights, duties and responsibilities as if it had been originally named as Warrant Agent without further act or deed; but the predecessor Warrant Agent shall deliver and transfer to the successor Warrant Agent any property at
the time held by it hereunder, and execute and deliver any further assurance, conveyance, act or deed necessary for the purpose; provided, that, such predecessor Warrant Agent shall not be required to make any additional expenditure or assume any
additional liability in connection with the foregoing. Not later than the effective date of any such appointment, the Company shall file notice thereof in writing with the predecessor Warrant Agent and each transfer agent of the Common Stock, and
send a notice thereof in writing to the Holders of the Warrant Certificates. However, failure to give any notice provided for in this Section 17, or any defect therein, shall not affect the legality or validity of the resignation or removal of
the Warrant Agent or the appointment of the successor Warrant Agent, as the case may be. 
 Section 18. Issuance of New
Warrants. Notwithstanding any of the provisions of this Agreement or of the Warrants to the contrary, the Company may, at its option, issue a new Global Warrant or Warrant Certificates, if any, evidencing Warrants in such form as may be approved
by its Board of Directors to reflect any adjustment or change in the Exercise Price per share and the number or kind or class of shares of stock or other securities or property purchasable under the Global Warrant or Warrant Certificate, if any,
made in accordance with the provisions of this Agreement. 
 Section 19. Notices. Notices or demands authorized by this
Agreement to be given or made (i) by the Warrant Agent or by the Holder of any Warrants to or on the Company, (ii) subject to the provisions of Section 17, by the Company or by the Holder of any Warrants to or on the Warrant Agent or
(iii) by the Company or the Warrant Agent to the Holder of any Warrant, may be delivered personally, by facsimile, e-mail (except with respect to the Warrant Agent) or sent by a nationally recognized
overnight courier service to each recipient at the facsimile number or address of such recipient appearing below or on the books of the Company or the Warrant Agent, as applicable, and shall be deemed given and effective on the earliest of
(i) the time of transmission, if such notice or communication is delivered via facsimile (with confirmation) or e-mail at the facsimile number or e-mail address, as
applicable, as provided in this Section prior to 5:30 p.m. (New York City time) on any date, (ii) the next Business Day after the time of transmission, if such notice or communication is delivered via facsimile (with confirmation) or e-mail at the facsimile number or e-mail as provided in this Section on a day that is not a Business Day or later than 5:30 p.m. (New York City time) on any Business Day,
(iii) the first Business Day following the date of mailing, if sent by U.S. nationally recognized overnight courier service, or (iv) upon actual receipt by the party to whom such notice is required to be given. 

  
 15 

 (a) If to the Company, to: 

BIOLASE, Inc. 
 4 Cromwell,
Irvine, California 92618 
 Attention: John R. Beaver, Executive Vice President and Chief Financial Officer 

Facsimile number: [•] 
 E-mail address: jbeaver@biolase.com 

  
 16 

 (b) If to the Warrant Agent, to: 

Computershare Inc. 
 Computershare
Trust Company, N.A. 
 150 Royall Street 

Canton, MA 02021 
 Attention:
Client Services 
 Facsimile: 781-575-4647 

E-mail address: * 

(c) If to the Holder of any Warrant, to the address, facsimile number or e-mail address of such Holder
as shown on the registry books of the Company. Any notice required to be delivered by the Company to the Holder of any Warrant may be given by the Warrant Agent on behalf of the Company. Notwithstanding any other provision of this Agreement, where
this Agreement provides for notice of any event to a Holder of any Warrant Certificate, for a Global Warrant, such notice shall be sufficiently given if given to the Depositary (or its designee) pursuant to the procedures of the Depositary or its
designee. 
 Section 20. Supplements and Amendments. 

(a) The Company and the Warrant Agent may from time to time supplement or amend this Agreement without the approval of any Holders of Warrants
in order to cure any ambiguity, to correct or supplement any provision contained herein which may be defective or inconsistent with any other provisions herein, or to make any other provisions with regard to matters or questions arising hereunder
which the Company and the Warrant Agent may deem necessary or desirable and which shall not adversely affect the interests of the Holders of the Warrants in any material respect. 

(b) In addition to the foregoing, with the consent of Holders of Warrants, the Company and the Warrant Agent may modify this Agreement for the
purpose of adding any provisions to or changing in any manner or eliminating any of the provisions of this Agreement or modifying in any manner the rights of the Holders of the Warrant Certificates; provided, however, that no modification
of the terms (including but not limited to the adjustments described in Section (11) upon which the Warrants are exercisable or reducing the percentage required for consent to modification of this Agreement may be made without the consent of
the Holder of each outstanding warrant certificate affected thereby. As a condition precedent to the Warrant Agent’s execution of any amendment, the Company shall deliver to the Warrant Agent a certificate from a duly authorized officer of the
Company that states that the proposed amendment complies with the terms of this Section 20. Notwithstanding anything in this Agreement to the contrary, the Warrant Agent shall not be required to execute any supplement or amendment to this
Agreement that it has determined would adversely affect its own rights, duties, obligations or immunities under this Agreement. No supplement or amendment to this Agreement shall be effective unless duly executed by the Warrant Agent. 

Section 21. Successors. All covenants and provisions of this Agreement by or for the benefit of the Company or the Warrant Agent
shall bind and inure to the benefit of their respective successors and assigns hereunder. 

  
 17 

 Section 22. Benefits of this Agreement. Nothing in this Agreement shall be
construed to give any Person other than the Company, the Holders of Warrants and the Warrant Agent any legal or equitable right, remedy or claim under this Agreement; but this Agreement shall be for the sole and exclusive benefit of the Company, the
Warrant Agent and the Holders of the Warrants. 
 Section 23. Governing Law. This Agreement and each Warrant issued hereunder
shall be governed by, and construed in accordance with, the internal laws of the State of New York without giving effect to the conflicts of law principles thereof. 

Section 24. Counterparts. This Agreement may be executed in any number of counterparts and each of such counterparts shall for all
purposes be deemed to be an original, and all such counterparts shall together constitute but one and the same instrument. A signature to this Agreement transmitted electronically shall have the same authority, effect, and enforceability as an
original signature. 
 Section 25. Captions. The captions of the sections of this Agreement have been inserted for convenience
only and shall not control or affect the meaning or construction of any of the provisions hereof. 
 Section 26. Information.
The Company agrees to promptly provide to the Holders of the Warrants any information it provides to all holders of the Common Stock, except to the extent any such information is publicly available on the EDGAR system (or any successor thereof) of
the Securities and Exchange Commission. 
 Section 27. Force Majeure. Notwithstanding anything to the contrary contained herein,
Warrant Agent shall not be liable for any delays or failures in performance resulting from acts beyond its reasonable control including, without limitation, acts of God, terrorist acts, epidemics, pandemics, shortage of supply, breakdowns or
malfunctions, interruptions or malfunction of computer facilities, or loss of data due to power failures or mechanical difficulties with information storage or retrieval systems, labor difficulties, war, or civil unrest, it being understood that the
Warrant Agent shall use reasonable best efforts which are consistent with accepted practices in the banking industry to resume performance as soon as practicable under the circumstances; provided, however, that this provision shall not affect or
limit in any way the obligations of the Company under the Global Warrants or the Warrant Certificates. 
 Section 28. [Intentionally
Omitted.]. 
 Section 29. Consequential Damages. Neither party to this Agreement shall be liable to the other party for any
consequential, indirect, special or incidental damages under any provisions of this Agreement or for any consequential, indirect, punitive, special or incidental damages arising out of any act or failure to act hereunder even if that party has been
advised of or has foreseen the possibility of such damages. 

  
 18 

 Section 30. Confidentiality. The Warrant Agent and the Company agree that all
books, records, information and data pertaining to the business of the other party, including inter alia, personal, non-public warrant holder information, which are exchanged or received pursuant to the
negotiation or the carrying out of this Agreement including the fees for services set forth in the attached schedule shall remain confidential, and shall not be voluntarily disclosed to any other person, except as may be required by law, including,
without limitation, pursuant to subpoenas from state or federal government authorities (e.g., in divorce and criminal actions). However, each party may disclose relevant aspects of the other party’s confidential information to its officers,
affiliates, agents, subcontractors and employees to the extent reasonably necessary to perform its duties and obligations under this Agreement and such disclosure is not prohibited by applicable law. 

Section 31. Further Assurance. The Company shall perform, acknowledge and deliver or cause to be performed, acknowledged and
delivered all such further and other acts, documents, instruments and assurances as may be reasonably required by the Warrant Agent for the carrying out or performing by the Warrant Agent of the provisions of this Agreement. 

Section 32. Severability. If any term, provision, covenant or restriction of this Agreement is held by a court of competent
jurisdiction or other authority to be invalid, void or unenforceable, the remainder of the terms, provisions, covenants and restrictions of this Agreement shall remain in full force and effect and shall in no way be affected, impaired or
invalidated; provided, however, that if such excluded provision shall affect the rights, immunities, liabilities, duties or obligations of the Warrant Agent, the Warrant Agent shall be entitled to resign immediately upon written notice to the
Company. 
 [Signature Page to Follow] 

  
 19 

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

			
	BIOLASE, INC
		
	By:	 	 /s/ John R. Beaver

		 	Name: John R. Beaver
		 	 Title: Executive Vice President and
 Chief
Financial Officer

	
	COMPUTERSHARE INC and
	COMPUTERSHARE TRUST COMPANY, N.A.
	 On behalf of both entities

		
	By:	 	 /s/ Collin Ekeogu

		 	Name: Collin Ekeogu
		 	Title: Manager, Corporate Actions

  
 20 

 Annex A: Form of Warrant Certificate Request Notice 

WARRANT CERTIFICATE REQUEST NOTICE 
 To:
Computershare Inc. and Computershare Trust Company, N.A., jointly as Warrant Agent for BIOLASE, Inc. (the “Company”) 
 The undersigned Holder of
Common Stock Purchase Warrants (“Warrants”) in the form of Global Warrants issued by the Company hereby elects to receive a Warrant Certificate evidencing the Warrants held by the Holder as specified below: 

 

	 	1.	 Name of Holder of Warrants in form of Global Warrants:
                     

  

	 	2.	 Name of Holder in Warrant Certificate (if different from name of Holder of Warrants in form of Global
Warrants):                      

  

	 	3.	 Number of Warrants in name of Holder in form of Global Warrants:
                     

  

	 	4.	 Number of Warrants for which Warrant Certificate shall be issued:
                     

  

	 	5.	 Number of Warrants in name of Holder in form of Global Warrants after issuance of Warrant Certificate, if any:
                     

  

	 	6.	 Warrant Certificate shall be delivered to the following address: 

 

			
	        	 	  

		
		 	  

		
		 	  

 The undersigned hereby acknowledges and agrees that, in connection with this Warrant Exchange and the issuance of the Warrant
Certificate, the Holder is deemed to have surrendered the number of Warrant Shares in form of Global Warrants in the name of the Holder equal to the number of Warrant Shares evidenced by the Warrant Certificate. 

[SIGNATURE OF HOLDER] 
 Name of
Investor:
                                         
                                         
                               

Signature of Authorized Signatory of Investor if Investor Is an Entity:
                               

Name of Authorized Signatory:
                                         
                                         
         
 Title of Authorized Signatory:
                                         
                                         
           
 Date:
                                        

  
 21 

 Signature of Authorized Signatory of Investor if Investor Is an Individual: 

 

			
	      	 	  

 Date:
                                        

  
 22 

 Exhibit 1: Form of WarrantEX-4.2

 Exhibit 4.2 

COMMON STOCK PURCHASE WARRANT 

BIOLASE, INC. 
  

			
	Warrant Shares: ____________	  	Initial Exercise Date: ____________, 2020

 THIS COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received,
_____________ or its assigns (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after the date hereof (the “Initial Exercise
Date”) and on or prior to 5:00 p.m. (New York City time) on July 22, 2025 (the “Termination Date”) but not thereafter, to subscribe for and purchase from BIOLASE, Inc., a Delaware corporation (the
“Company”), up to ______ shares (as subject to adjustment hereunder, the “Warrant Shares”) of Common Stock. The purchase price of one share of Common Stock under this Warrant shall be equal to the Exercise Price, as
defined in Section 2(b). This Warrant shall initially be issued and maintained in the form of a security held in book-entry form and the Depository Trust Company or its nominee (“DTC”) shall initially be the sole registered
holder of this Warrant, subject to a Holder’s right to elect to receive a Warrant in certificated form pursuant to the terms of the Warrant Agency Agreement, in which case this sentence shall not apply. 

Section 1. Definitions. In addition to the terms defined elsewhere in this Warrant, the following terms have the meanings
indicated in this Section 1: 
 “Affiliate” means any Person that, directly or indirectly through one or more
intermediaries, controls or is controlled by or is under common control with a Person, as such terms are used in and construed under Rule 405 under the Securities Act. 

“Bid Price” means, for any date, the price determined by the first of the following clauses that applies: (a) if the
Common Stock is then listed or quoted on a Trading Market, the bid price of the Common Stock for the time in question (or the nearest preceding date) on the Trading Market on which the Common Stock is then listed or quoted as reported by Bloomberg
L.P. (based on a Trading Day from 9:30 a.m. (New York City time) to 4:02 p.m. (New York City time)), (b) if OTCQB or OTCQX is not a Trading Market, the volume weighted average price of the Common Stock for such date (or the nearest preceding
date) on OTCQB or OTCQX as applicable, (c) if the Common Stock is not then listed or quoted for trading on OTCQB or OTCQX and if prices for the Common Stock are then reported in the “Pink Sheets” published by OTC Markets Group, Inc.
(or a similar organization or agency succeeding to its functions of reporting prices), the most recent bid price per share of the Common Stock so reported, or (d) in all other cases, the fair market value of a share of Common Stock as
determined by an independent appraiser selected in good faith by the Holders of a majority in interest of the Warrants then outstanding and reasonably acceptable to the Company, the fees and expenses of which shall be paid by the Company. 

 “Business Day” means any day except any Saturday, any Sunday, any day which
is a federal legal holiday in the United States or any day on which banking institutions in the State of New York are authorized or required by law or other governmental action to close. 

“Commission” means the United States Securities and Exchange Commission. 

“Common Stock” means the common stock of the Company, par value $0.001 per share, and any other class of securities into
which such securities may hereafter be reclassified or changed. 
 “Common Stock Equivalents” means any securities of the
Company or the Subsidiaries which would entitle the holder thereof to acquire at any time Common Stock, including, without limitation, any debt, preferred stock, right, option, warrant or other instrument that is at any time convertible into or
exercisable or exchangeable for, or otherwise entitles the holder thereof to receive, Common Stock. 
 “Exchange Act” means
the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder. 
 “Person” means an
individual or corporation, partnership, trust, incorporated or unincorporated association, joint venture, limited liability company, joint stock company, government (or an agency or subdivision thereof) or other entity of any kind. 

“Registration Statement” means the Company’s registration statement on Form S-1
(File No. 333-238914) and any prospectus included therein in compliance with Rule 424(b) of the Securities Act. 

“Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder. 

“Subsidiary” means any subsidiary of the Company and shall, where applicable, also include any direct or indirect subsidiary
of the Company formed or acquired after the date hereof. 
 “Trading Day” means a day on which the Common Stock is traded
on a Trading Market. 
 “Trading Market” means any of the following markets or exchanges on which the Common Stock is
listed or quoted for trading on the date in question: the NYSE American, the Nasdaq Capital Market, the Nasdaq Global Market, the Nasdaq Global Select Market or the New York Stock Exchange (or any successors to any of the foregoing). 

“Transfer Agent” means Computershare Trust Company N.A., the current transfer agent of the Company with a mailing address of
150 Royall Street, Canton, MA 02021 and a facsimile number of (866) 519-2854 and any successor transfer agent of the Company. 

“VWAP” means, for any date, the price determined by the first of the following clauses that applies: (a) if the Common
Stock is then listed or quoted on a Trading Market, the daily volume weighted average price of the Common Stock for such date (or the nearest preceding date) on the Trading Market on which the Common Stock is then listed or quoted as reported by

  
 2 

 
Bloomberg L.P. (based on a Trading Day from 9:30 a.m. (New York City time) to 4:02 p.m. (New York City time)), (b) if OTCQB or OTCQX is not a Trading Market, the volume weighted average
price of the Common Stock for such date (or the nearest preceding date) on OTCQB or OTCQX as applicable, (c) if the Common Stock is not then listed or quoted for trading on OTCQB or OTCQX and if prices for the Common Stock are then reported in
the “Pink Sheets” published by OTC Markets Group, Inc. (or a similar organization or agency succeeding to its functions of reporting prices), the most recent bid price per share of the Common Stock so reported, or (d) in all other
cases, the fair market value of a share of Common Stock as determined by an independent appraiser selected in good faith by the holders of a majority in interest of the Warrants then outstanding and reasonably acceptable to the Company, the fees and
expenses of which shall be paid by the Company. 
 “Warrant Agency Agreement” means that certain warrant agency agreement,
dated on or about the Initial Exercise Date, between the Company and the Warrant Agent. 
 “Warrant Agent” means,
collectively, Computershare Inc., a Delaware corporation, and Computershare Trust Company N.A or any successor warrant agent of the Company. 

“Warrants” means this Warrant and other Common Stock purchase warrants issued by the Company pursuant to the Registration
Statement. 
 Section 2. Exercise. 

a) Exercise of Warrant. Exercise of the purchase rights represented by this Warrant may be made, in whole or in part, at any time or
times on or after the Initial Exercise Date and on or before the Termination Date by delivery to the Warrant Agent, with a copy to the Company at [•]2, of a duly executed facsimile copy or
PDF copy submitted by e-mail (or e-mail attachment) of the Notice of Exercise in the form annexed hereto (the “Notice of Exercise”). Within the earlier of (i)
two (2) Trading Days and (ii) the number of Trading Days comprising the Standard Settlement Period (as defined in Section 2(d)(i) herein) following the date of exercise as aforesaid, the Holder shall deliver the aggregate Exercise Price for the
shares specified in the applicable Notice of Exercise by wire transfer or cashier’s check drawn on a United States bank unless the cashless exercise procedure specified in Section 2(c) below is specified in the applicable Notice of Exercise. No
ink-original Notice of Exercise shall be required, nor shall any medallion guarantee (or other type of guarantee or notarization) of any Notice of Exercise be required. Notwithstanding anything herein to the contrary, the Holder shall not be
required to physically surrender this Warrant to the Warrant Agent until the Holder has purchased all of the Warrant Shares available hereunder and the Warrant has been exercised in full, in which case, the Holder shall surrender this Warrant to the
Company for cancellation within three (3) Trading Days of the date on which the final Notice of Exercise is delivered to the Company. Partial exercises of this Warrant resulting in purchases of a portion of the total number of Warrant Shares
available hereunder shall have the effect of lowering the outstanding number of Warrant Shares purchasable hereunder in an amount equal to the applicable number of Warrant Shares purchased. The Holder and the Warrant Agent shall maintain records
showing the number of Warrant Shares purchased and the date of such purchases. The Company shall deliver any objection to any Notice of Exercise within one (1) 
  

 

	2 	 Draft to Note: to insert an email address of the Company

  
 3 

 
Business Day of receipt of such notice from the Warrant Agent. The Holder and any assignee, by acceptance of this Warrant, acknowledge and agree that, by reason of the provisions
of this paragraph, following the purchase of a portion of the Warrant Shares hereunder, the number of Warrant Shares available for purchase hereunder at any given time may be less than the amount stated on the face hereof. 

Notwithstanding the foregoing in this Section 2(a), a holder whose interest in this Warrant is a beneficial interest in certificate(s) representing this
Warrant held in book-entry form through DTC (or another established clearing corporation performing similar functions and subject to registration under the Securities Exchange Act of 1934, as amended), shall effect exercises made pursuant to this
Section 2(a) by delivering to DTC (or such other clearing corporation, as applicable) the appropriate instruction form for exercise, complying with the procedures to effect exercise that are required by DTC (or such other clearing corporation,
as applicable), subject to a Holder’s right to elect to receive a Warrant in certificated form pursuant to the terms of the Warrant Agency Agreement, in which case this sentence shall not apply. 

b) Exercise Price. The exercise price per share of Common Stock under this Warrant shall be $0.40, subject to adjustment hereunder (the
“Exercise Price”). 
 c) Cashless Exercise. 

i. If at the time of exercise hereof there is no effective registration statement registering, or the prospectus contained
therein is not available for the issuance of the Warrant Shares to the Holder, then this Warrant may also be exercised, in whole or in part, at such time by means of a “cashless exercise” in which the Holder shall be entitled to receive a
number of Warrant Shares equal to the quotient obtained by dividing [(A-B) (X)] by (A), where: 
  

	(A)	 as applicable: (i) the VWAP on the Trading Day immediately preceding the date of the applicable Notice of
Exercise if such Notice of Exercise is (1) both executed and delivered pursuant to Section 2(a) hereof on a day that is not a Trading Day or (2) both executed and delivered pursuant to Section 2(a) hereof on a Trading Day prior to the opening of
“regular trading hours” (as defined in Rule 600(b)(64) of Regulation NMS promulgated under the federal securities laws) on such Trading Day, (ii) at the option of the Holder, either (y) the VWAP on the Trading Day immediately preceding the
date of the applicable Notice of Exercise or (z) the Bid Price of the Common Stock on the principal Trading Market as reported by Bloomberg L.P. as of the time of the Holder’s execution of the applicable Notice of Exercise if such Notice of
Exercise is executed during “regular trading hours” on a Trading Day and is delivered within two (2) hours thereafter (including until two (2) hours after the close of “regular trading hours” on a Trading Day) pursuant to Section
2(a) hereof or (iii) the VWAP on the date of the applicable Notice of Exercise if the date of such Notice of Exercise is a Trading Day and such Notice of Exercise is both executed and delivered pursuant to Section 2(a) hereof after the close of
“regular trading hours” on such Trading Day; 

  

	(B)	 the Exercise Price of this Warrant, as adjusted hereunder; and 

  
 4 

	(X)	 the number of Warrant Shares that would be issuable upon exercise of this Warrant in accordance with the terms
of this Warrant if such exercise were by means of a cash exercise rather than a cashless exercise. 

 ii.
If Warrant Shares are issued in a cashless exercise pursuant to this Section 2(c), the parties acknowledge and agree that in accordance with Section 3(a)(9) of the Securities Act, the Warrant Shares shall take on the registered
characteristics of the Warrants being exercised. The Company agrees not to take any position contrary to this Section 2(c). 

d) Mechanics of Exercise. 

i. Delivery of Warrant Shares Upon Exercise. The Company shall cause the Warrant Shares purchased hereunder to be
transmitted by the Transfer Agent to the Holder by crediting the account of the Holder’s or its designee’s balance account with The Depository Trust Company through its Deposit or Withdrawal at Custodian system (“DWAC”) if the
Company is then a participant in such system and either (A) there is an effective registration statement permitting the issuance of the Warrant Shares to or resale of the Warrant Shares by the Holder or (B) this Warrant is being
exercised via cashless exercise, and otherwise by physical delivery of a certificate, registered in the Company’s share register in the name of the Holder or its designee, for the number of Warrant Shares to which the Holder is entitled
pursuant to such exercise to the address specified by the Holder in the Notice of Exercise by the date that is the earliest of (i) two (2) Trading Days after the delivery to the Warrant Agent of the Notice of Exercise,
(ii) one (1) Trading Day after delivery of the aggregate Exercise Price to the Warrant Agent and (iii) the number of Trading Days comprising the Standard Settlement Period after the delivery to the Warrant Agent of the Notice of
Exercise (such date, the “Warrant Share Delivery Date”). Upon delivery of the Notice of Exercise, the Holder shall be deemed for all corporate purposes to have become the holder of record of the Warrant Shares with respect to which
this Warrant has been exercised, irrespective of the date of delivery of the Warrant Shares, provided that payment of the aggregate Exercise Price (other than in the case of a cashless exercise) is received within the earlier of (i) two (2) Trading
Days and (ii) the number of Trading Days comprising the Standard Settlement Period following delivery of the Notice of Exercise. The Company agrees to maintain a transfer agent that is a participant in the FAST program so long as this Warrant
remains outstanding and exercisable. As used herein, “Standard Settlement Period” means the standard settlement period, expressed in a number of Trading Days, on the Company’s primary Trading Market with respect to the Common
Stock as in effect on the date of delivery of the Notice of Exercise. 
 ii. Delivery of New Warrants Upon Exercise.
If this Warrant shall have been exercised in part, the Company shall, at the request of a Holder and upon surrender of this Warrant certificate, at the time of delivery of the Warrant Shares, cause the Warrant Agent to deliver to the Holder a new
Warrant evidencing the rights of the Holder to purchase the unpurchased Warrant Shares called for by this Warrant, which new Warrant shall in all other respects be identical with this Warrant. 

  
 5 

 iii. Rescission Rights. If the Company fails to cause the Transfer
Agent to transmit to the Holder the Warrant Shares pursuant to Section 2(d)(i) by the Warrant Share Delivery Date, then the Holder will have the right to rescind such exercise. 

iv. Compensation for Buy-In on Failure to Timely Deliver Warrant Shares Upon
Exercise. In addition to any other rights available to the Holder, if the Company fails to cause the Transfer Agent to transmit to the Holder the Warrant Shares in accordance with the provisions of Section 2(d)(i) above pursuant to an
exercise on or before the Warrant Share Delivery Date, and if after such date the Holder is required by its broker to purchase (in an open market transaction or otherwise) or the Holder’s brokerage firm otherwise purchases, shares of Common
Stock to deliver in satisfaction of a sale by the Holder of the Warrant Shares which the Holder anticipated receiving upon such exercise (a “Buy-In”), then the Company shall (A) pay in cash to the Holder the amount, if
any, by which (x) the Holder’s total purchase price (including brokerage commissions, if any) for the shares of Common Stock so purchased exceeds (y) the amount obtained by multiplying (1) the number of
Warrant Shares that the Company was required to deliver to the Holder in connection with the exercise at issue times (2) the price at which the sell order giving rise to such purchase obligation was executed, and (B) at the
option of the Holder, either reinstate the portion of the Warrant and equivalent number of Warrant Shares for which such exercise was not honored (in which case such exercise shall be deemed rescinded) or deliver to the Holder the number of shares
of Common Stock that would have been issued had the Company timely complied with its exercise and delivery obligations hereunder. For example, if the Holder purchases Common Stock having a total purchase price of $11,000 to cover a Buy-In with
respect to an attempted exercise of shares of Common Stock with an aggregate sale price giving rise to such purchase obligation of $10,000, under clause (A) of the immediately preceding sentence the Company shall be required to pay the
Holder $1,000. The Holder shall provide the Company written notice indicating the amounts payable to the Holder in respect of the Buy-In and, upon request of the Company, evidence of the amount of such loss. Nothing herein shall limit a
Holder’s right to pursue any other remedies available to it hereunder, at law or in equity including, without limitation, a decree of specific performance and/or injunctive relief with respect to the Company’s failure to timely deliver
shares of Common Stock upon exercise of the Warrant as required pursuant to the terms hereof. 
 v. No Fractional Shares
or Scrip. No fractional shares or scrip representing fractional shares shall be issued upon the exercise of this Warrant. As to any fraction of a share which the Holder would otherwise be entitled to purchase upon such exercise, the Company
shall, at its election, either pay a cash adjustment in respect of such final fraction in an amount equal to such fraction multiplied by the Exercise Price or round up to the next whole share. 

vi. Charges, Taxes and Expenses. Issuance of Warrant Shares shall be made without charge to the Holder for any issue or
transfer tax or other incidental expense in respect of the issuance of such Warrant Shares, all of which taxes and expenses shall be paid by the Company, and such Warrant Shares shall be issued in the name of the Holder or in such name or names as
may be directed by the Holder; provided, however, that in the event that Warrant Shares are to be issued in a name other than the name of the Holder, 

  
 6 

 
this Warrant when surrendered for exercise shall be accompanied by the Assignment Form attached hereto duly executed by the Holder and the Company may require, as a condition thereto, the payment
of a sum sufficient to reimburse it for any transfer tax incidental thereto. The Company shall pay all Transfer Agent fees required for same-day processing of any Notice of Exercise and all fees to the
Depository Trust Company (or another established clearing corporation performing similar functions) required for same-day electronic delivery of the Warrant Shares. 

vii. Closing of Books. The Company will not close its stockholder books or records in any manner which prevents the
timely exercise of this Warrant, pursuant to the terms hereof. 
 e) Holder’s Exercise Limitations. The Warrant Agent shall not
be required to effect any exercise of this Warrant, and a Holder shall not have the right to exercise any portion of this Warrant, pursuant to Section 2 or otherwise, to the extent that after giving effect to such issuance after exercise as set
forth on the applicable Notice of Exercise, the Holder (together with the Holder’s Affiliates, and any other Persons acting as a group together with the Holder or any of the Holder’s Affiliates (such Persons, “Attribution
Parties”)), would beneficially own in excess of the Beneficial Ownership Limitation (as defined below). For purposes of the foregoing sentence, the number of shares of Common Stock beneficially owned by the Holder and its
Affiliates and Attribution Parties shall include the number of shares of Common Stock issuable upon exercise of this Warrant with respect to which such determination is being made, but shall exclude the number of shares of Common Stock which would
be issuable upon (i) exercise of the remaining, nonexercised portion of this Warrant beneficially owned by the Holder or any of its Affiliates or Attribution Parties and (ii) exercise or conversion of the unexercised or
nonconverted portion of any other securities of the Company (including, without limitation, any other Common Stock Equivalents) subject to a limitation on conversion or exercise analogous to the limitation contained herein beneficially owned by the
Holder or any of its Affiliates or Attribution Parties. Except as set forth in the preceding sentence, for purposes of this Section 2(e), beneficial ownership shall be calculated in accordance with Section 13(d)
of the Exchange Act and the rules and regulations promulgated thereunder, it being acknowledged by the Holder that the Company is not representing to the Holder that such calculation is in compliance with Section 13(d) of the Exchange
Act and the Holder is solely responsible for any schedules required to be filed in accordance therewith. To the extent that the limitation contained in this Section 2(e) applies, the determination of whether this Warrant is exercisable
(in relation to other securities owned by the Holder together with any Affiliates and Attribution Parties) and of which portion of this Warrant is exercisable shall be in the sole discretion of the Holder, and the submission of a Notice of Exercise
shall be deemed to be the Holder’s determination of whether this Warrant is exercisable (in relation to other securities owned by the Holder together with any Affiliates and Attribution Parties) and of which portion of this Warrant is
exercisable, in each case subject to the Beneficial Ownership Limitation, and the Company shall have no obligation to verify or confirm the accuracy of such determination. In addition, a determination as to any group status as contemplated above
shall be determined in accordance with Section 13(d) of the Exchange Act and the rules and regulations promulgated thereunder. For purposes of this Section 2(e), in determining the number of outstanding shares of Common
Stock, a Holder may rely on the number of outstanding shares of Common Stock as reflected in (A) the Company’s most recent periodic or annual report filed 

  
 7 

 
with the Commission, as the case may be, (B) a more recent public announcement by the Company or (C) a more recent written notice by the Company or the Transfer Agent setting
forth the number of shares of Common Stock outstanding. Upon the written or oral request of a Holder, the Company shall within one Trading Day confirm orally and in writing to the Holder the number of shares of Common Stock then
outstanding. In any case, the number of outstanding shares of Common Stock shall be determined after giving effect to the conversion or exercise of securities of the Company, including this Warrant, by the Holder or its Affiliates or
Attribution Parties since the date as of which such number of outstanding shares of Common Stock was reported. The “Beneficial Ownership Limitation” shall be 4.99% of the number of shares of the Common Stock outstanding immediately
after giving effect to the issuance of shares of Common Stock issuable upon exercise of this Warrant. The Holder, upon notice to the Company, may increase or decrease the Beneficial Ownership Limitation provisions of this Section 2(e),
provided that the Beneficial Ownership Limitation in no event exceeds 9.99% of the number of shares of the Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock upon exercise of this Warrant held by the
Holder and the provisions of this Section 2(e) shall continue to apply. Any increase in the Beneficial Ownership Limitation will not be effective until the 61st day after
such notice is delivered to the Company. The provisions of this paragraph shall be construed and implemented in a manner otherwise than in strict conformity with the terms of this Section 2(e) to correct this paragraph (or any portion
hereof) which may be defective or inconsistent with the intended Beneficial Ownership Limitation herein contained or to make changes or supplements necessary or desirable to properly give effect to such limitation. The limitations contained in this
paragraph shall apply to a successor holder of this Warrant. 
 f) [Intentionally Omitted]. 

g) [Intentionally Omitted]. 

Section 3. Certain Adjustments. 

a) Stock Dividends and Splits. If the Company, at any time while this Warrant is outstanding: (i) pays a stock dividend or
otherwise makes a distribution or distributions on shares of its Common Stock or any other equity or equity equivalent securities payable in shares of Common Stock (which, for avoidance of doubt, shall not include any shares of Common Stock issued
by the Company upon exercise of this Warrant), (ii) subdivides outstanding shares of Common Stock into a larger number of shares, (iii) combines (including by way of reverse stock split) outstanding shares of Common Stock into a smaller
number of shares, or (iv) issues by reclassification of shares of the Common Stock any shares of capital stock of the Company, then in each case the Exercise Price shall be multiplied by a fraction of which the numerator shall be the
number of shares of Common Stock (excluding treasury shares, if any) outstanding immediately before such event and of which the denominator shall be the number of shares of Common Stock outstanding immediately after such event, and the number of
shares issuable upon exercise of this Warrant shall be proportionately adjusted such that the aggregate Exercise Price of this Warrant shall remain unchanged. Any adjustment made pursuant to this Section 3(a) shall become effective
immediately after the record date for the determination of stockholders entitled to receive such dividend or distribution and shall become effective immediately after the effective date in the case of a subdivision, combination or re-classification.

  
 8 

 b) Intentionally omitted. 

c) Subsequent Rights Offerings. In addition to any adjustments pursuant to Section 3(a) above, if at any time the Company grants, issues
or sells any Common Stock Equivalents or rights to purchase stock, warrants, securities or other property pro rata to the record holders of any class of shares of Common Stock (the “Purchase Rights”), then the Holder will be entitled to
acquire, upon the terms applicable to such Purchase Rights, the aggregate Purchase Rights which the Holder could have acquired if the Holder had held the number of shares of Common Stock acquirable upon complete exercise of this Warrant (without
regard to any limitations on exercise hereof, including without limitation, the Beneficial Ownership Limitation) immediately before the date on which a record is taken for the grant, issuance or sale of such Purchase Rights, or, if no such record is
taken, the date as of which the record holders of shares of Common Stock are to be determined for the grant, issue or sale of such Purchase Rights (provided, however, to the extent that the Holder’s right to participate in any such Purchase
Right would result in the Holder exceeding the Beneficial Ownership Limitation, then the Holder shall not be entitled to participate in such Purchase Right to such extent (or beneficial ownership of such shares of Common Stock as a result of such
Purchase Right to such extent) and such Purchase Right to such extent shall be held in abeyance for the Holder until such time, if ever, as its right thereto would not result in the Holder exceeding the Beneficial Ownership Limitation). 

d) Pro Rata Distributions. During such time as this Warrant is outstanding, if the Company shall declare or make any dividend or other
distribution of its assets (or rights to acquire its assets) to holders of shares of Common Stock, by way of return of capital or otherwise (including, without limitation, any distribution of cash, stock or other securities, property or options by
way of a dividend, spin off, reclassification, corporate rearrangement, scheme of arrangement or other similar transaction) (a “Distribution”), at any time after the issuance of this Warrant, then, in each such case, the Holder
shall be entitled to participate in such Distribution to the same extent that the Holder would have participated therein if the Holder had held the number of shares of Common Stock acquirable upon complete exercise of this Warrant (without regard to
any limitations on exercise hereof, including without limitation, the Beneficial Ownership Limitation) immediately before the date of which a record is taken for such Distribution, or, if no such record is taken, the date as of which the record
holders of shares of Common Stock are to be determined for the participation in such Distribution (provided, however, that to the extent that the Holder’s right to participate in any such Distribution would result in the
Holder exceeding the Beneficial Ownership Limitation, then the Holder shall not be entitled to participate in such Distribution to such extent (or in the beneficial ownership of any shares of Common Stock as a result of such Distribution to such
extent) and the portion of such Distribution shall be held in abeyance for the benefit of the Holder until such time, if ever, as its right thereto would not result in the Holder exceeding the Beneficial Ownership Limitation). To the extent that
this Warrant has not been partially or completely exercised at the time of such Distribution, such portion of the Distribution shall be held in abeyance for the benefit of the Holder until the Holder has exercised this Warrant. 

e) Fundamental Transaction. If, at any time while this Warrant is outstanding, (i) the Company, directly or indirectly, in one or
more related transactions effects any merger or consolidation of the Company with or into another Person, (ii) the Company, directly or indirectly, effects any sale, lease, license, assignment, transfer, conveyance or other disposition
of all or 

  
 9 

 
substantially all of its assets in one or a series of related transactions, (iii) any, direct or indirect, purchase offer, tender offer or exchange offer (whether by the Company or another
Person) is completed pursuant to which holders of Common Stock are permitted to sell, tender or exchange their shares for other securities, cash or property and has been accepted by the holders of 50% or more of the outstanding Common Stock,
(iv) the Company, directly or indirectly, in one or more related transactions effects any reclassification, reorganization or recapitalization of the Common Stock or any compulsory share exchange pursuant to which the Common Stock is
effectively converted into or exchanged for other securities, cash or property, or (v) the Company, directly or indirectly, in one or more related transactions consummates a stock or share purchase agreement or other business combination
(including, without limitation, a reorganization, recapitalization, spin-off or scheme of arrangement) with another Person or group of Persons whereby such other Person or group acquires more than 50% of the outstanding shares of Common Stock (not
including any shares of Common Stock held by the other Person or other Persons making or party to, or associated or affiliated with the other Persons making or party to, such stock or share purchase agreement or other business combination) (each a
“Fundamental Transaction”), then, upon any subsequent exercise of this Warrant, the Holder shall have the right to receive, for each Warrant Share that would have been issuable upon such exercise immediately prior to the occurrence
of such Fundamental Transaction, at the option of the Holder (without regard to any limitation in Section 2(e) on the exercise of this Warrant), the number of shares of Common Stock of the successor or acquiring corporation or of the
Company, if it is the surviving corporation, and any additional consideration (the “Alternate Consideration”) receivable as a result of such Fundamental Transaction by a holder of the number of shares of Common Stock for which this
Warrant is exercisable immediately prior to such Fundamental Transaction (without regard to any limitation in Section 2(e) on the exercise of this Warrant). For purposes of any such exercise, the determination of the Exercise Price shall
be appropriately adjusted to apply to such Alternate Consideration based on the amount of Alternate Consideration issuable in respect of one share of Common Stock in such Fundamental Transaction, and the Company shall apportion the Exercise Price
among the Alternate Consideration in a reasonable manner reflecting the relative value of any different components of the Alternate Consideration. If holders of Common Stock are given any choice as to the securities, cash or property to be received
in a Fundamental Transaction, then the Holder shall be given the same choice as to the Alternate Consideration it receives upon any exercise of this Warrant following such Fundamental Transaction. Notwithstanding anything to the contrary, in the
event of a Fundamental Transaction, the Company or any Successor Entity (as defined below) shall, at the Holder’s option, exercisable at any time concurrently with, or within 30 days after, the consummation of the Fundamental Transaction (or,
if later, the date of the public announcement of the applicable Fundamental Transaction), purchase this Warrant from the Holder by paying to the Holder an amount of cash equal to the Black Scholes Value of the remaining unexercised portion of this
Warrant on the date of the consummation of such Fundamental Transaction; provided, however, if the Fundamental Transaction is not within the Company’s control, including not approved by the Company’s
Board of Directors, the Holder shall only be entitled to receive from the Company or any Successor Entity, as of the date of consummation of such Fundamental Transaction, the same type or form of consideration (and in the same proportion), at the
Black Scholes Value (as defined below) of the unexercised portion of this Warrant, that is being offered and paid to the holders of Common Stock of the Company in connection with the Fundamental Transaction, whether that consideration be in the form
of cash, stock or any combination thereof, or whether the holders of Common Stock are given the choice 

  
 10 

 
to receive from among alternative forms of consideration in connection with the Fundamental Transaction; provided, further, that if holders of Common Stock of the Company are not offered or paid
any consideration in such Fundamental Transaction, such holder of Common Stock will be deemed to have received common stock of the Successor Entity (which entity may be the Company following such Fundamental Transaction) in such Fundamental
Transaction. “Black Scholes Value” means the value of this Warrant based on the Black and Scholes Option Pricing Model obtained from the “OV” function on Bloomberg, L.P. (“Bloomberg”) determined as of the
day of consummation of the applicable Fundamental Transaction for pricing purposes and reflecting (A) a risk-free interest rate corresponding to the U.S. Treasury rate for a period equal to the time between the date of the public announcement of the
applicable Fundamental Transaction and the Termination Date, (B) an expected volatility equal to the greater of 100% and the 100 day volatility obtained from the HVT function on Bloomberg as of the Trading Day immediately following the public
announcement of the applicable Fundamental Transaction, (C) the underlying price per share used in such calculation shall be the greater of (i) the sum of the price per share being offered in cash, if any, plus the value of any non-cash
consideration, if any, being offered in such Fundamental Transaction and (ii) the highest VWAP during the period beginning on the Trading Day immediately preceding the announcement of the applicable Fundamental Transaction and ending on the Trading
Day immediately preceding the consummation of the applicable Fundamental Transaction and (D) a remaining option time equal to the time between the date of the public announcement of the applicable Fundamental Transaction and the Termination Date.
The payment of the Black Scholes Value will be made by wire transfer of immediately available funds within five Business Days of the Holder’s election (or, if later, on the effective date of the Fundamental Transaction). The Company shall cause
any successor entity in a Fundamental Transaction in which the Company is not the survivor (the “Successor Entity”) to assume in writing all of the obligations of the Company under this Warrant in accordance with the provisions of
this Section 3(e) pursuant to written agreements in form and substance reasonably satisfactory to the Holder and approved by the Holder (without unreasonable delay) prior to such Fundamental Transaction and shall, at the option of the Holder,
deliver to the Holder in exchange for this Warrant a security of the Successor Entity evidenced by a written instrument substantially similar in form and substance to this Warrant which is exercisable for a corresponding number of shares of capital
stock of such Successor Entity (or its parent entity) equivalent to the shares of Common Stock acquirable and receivable upon exercise of this Warrant (without regard to any limitations on the exercise of this Warrant) prior to such Fundamental
Transaction, and with an exercise price which applies the exercise price hereunder to such shares of capital stock (but taking into account the relative value of the shares of Common Stock pursuant to such Fundamental Transaction and the value of
such shares of capital stock, such number of shares of capital stock and such exercise price being for the purpose of protecting the economic value of this Warrant immediately prior to the consummation of such Fundamental Transaction), and which is
reasonably satisfactory in form and substance to the Holder. Upon the occurrence of any such Fundamental Transaction, the Successor Entity shall succeed to, and be substituted for (so that from and after the date of such Fundamental Transaction, the
provisions of this Warrant referring to the “Company” shall refer instead to the Successor Entity), and may exercise every right and power of the Company and shall assume all of the obligations of the Company under this Warrant with the
same effect as if such Successor Entity had been named as the Company herein. 
 f) Calculations. All calculations under this
Section 3 shall be made to the nearest cent or the nearest 1/100th of a share, as the case may be. For purposes of this Section 3, the number of shares of Common Stock deemed to be issued and outstanding as of a given date shall be the
sum of the number of shares of Common Stock (excluding treasury shares, if any) issued and outstanding. 

  
 11 

 g) Notice to Holder. 

i. Adjustment to Exercise Price. Whenever the Exercise Price is adjusted pursuant to any provision of this Section 3,
the Company shall promptly deliver to the Holder by facsimile or email a notice setting forth the Exercise Price after such adjustment and any resulting adjustment to the number of Warrant Shares and setting forth a brief statement of the facts
requiring such adjustment. 
 ii. Notice to Allow Exercise by Holder. If (A) the Company shall declare a
dividend (or any other distribution in whatever form) on the Common Stock, (B) the Company shall declare a special nonrecurring cash dividend on or a redemption of the Common Stock, (C) the Company shall authorize the granting to all
holders of the Common Stock rights or warrants to subscribe for or purchase any shares of capital stock of any class or of any rights, (D) the approval of any stockholders of the Company shall be required in connection with any
reclassification of the Common Stock, any consolidation or merger to which the Company is a party, any sale or transfer of all or substantially all of the assets of the Company, or any compulsory share exchange whereby the Common Stock is converted
into other securities, cash or property, or (E) the Company shall authorize the voluntary or involuntary dissolution, liquidation or winding up of the affairs of the Company, then, in each case, the Company shall cause to be delivered by
facsimile or email to the Holder at its last facsimile number or email address as it shall appear upon the Warrant Register of the Company, at least ten (10) calendar days prior to the applicable record or effective date hereinafter
specified, a notice stating (x) the date on which a record is to be taken for the purpose of such dividend, distribution, redemption, rights or warrants, or if a record is not to be taken, the date as of which the holders of the Common
Stock of record to be entitled to such dividend, distributions, redemption, rights or warrants are to be determined or (y) the date on which such reclassification, consolidation, merger, sale, transfer or share exchange is expected to
become effective or close, and the date as of which it is expected that holders of the Common Stock of record shall be entitled to exchange their shares of the Common Stock for securities, cash or other property deliverable upon such
reclassification, consolidation, merger, sale, transfer or share exchange; provided that the failure to deliver such notice or any defect therein or in the delivery thereof shall not affect the validity of the corporate action required to be
specified in such notice. To the extent that any notice provided in this Warrant constitutes, or contains, material, non-public information regarding the Company or any of the Subsidiaries, the Company shall simultaneously file such notice with the
Commission pursuant to a Current Report on Form 8-K. The Holder shall remain entitled to exercise this Warrant during the period commencing on the date of such notice to the effective date of the event triggering such notice except as may otherwise
be expressly set forth herein. 

  
 12 

 Section 4. Transfer of Warrant. 

a) Transferability. Subject to compliance with any applicable securities laws, this Warrant and all rights hereunder (including, without
limitation, any registration rights) are transferable, in whole or in part, upon surrender of this Warrant at the office of the Warrant Agent designated for such purpose, together with a written assignment of this Warrant substantially in the form
attached hereto properly completed and duly executed by the Holder or its agent or attorney and funds sufficient to pay any transfer taxes payable upon the making of such transfer accompanied by reasonable evidence of authority of the party making
such request that may be required by the Warrant Agent including but not limited to, the signature guarantee of a guarantor institution which is a participant in a signature guarantee program approved by the Securities Transfer Association. Upon
such surrender and, if required, such payment, the Company and the Warrant Agent shall execute and deliver a new Warrant or Warrants in the name of the assignee or assignees, as applicable, and in the denomination or denominations specified in such
instrument of assignment, and shall issue to the assignor a new Warrant evidencing the portion of this Warrant not so assigned, and this Warrant shall promptly be cancelled. Notwithstanding anything herein to the contrary, the Holder shall not be
required to physically surrender this Warrant to the Company unless the Holder has assigned this Warrant in full, in which case, the Holder shall surrender this Warrant to the Company within three (3) Trading Days of the date on which the Holder
delivers an assignment form to the Company assigning this Warrant in full. The Warrant, if properly assigned in accordance herewith, may be exercised by a new holder for the purchase of Warrant Shares without having a new Warrant issued. 

b) New Warrants. If this Warrant is not held in global form through DTC (or any successor depositary), this Warrant may be divided or
combined with other Warrants upon presentation hereof at the aforesaid office of the Company, together with a written notice specifying the names and denominations in which new Warrants are to be issued, signed by the Holder or its agent or
attorney. Subject to compliance with Section 4(a), as to any transfer which may be involved in such division or combination, and Section 3(c) of the Warrant Agency Agreement, the Company and the Warrant Agent shall execute and deliver a
new Warrant or Warrants in exchange for the Warrant or Warrants to be divided or combined in accordance with such notice. All Warrants issued on transfers or exchanges shall be dated the initial issuance date of this Warrant and shall be identical
with this Warrant except as to the number of Warrant Shares issuable pursuant thereto. 
 c) Warrant Register. The Warrant Agent shall
register this Warrant, upon records to be maintained by the Warrant Agent for that purpose (the “Warrant Register”), in the name of the record Holder hereof from time to time. Prior to due presentment for registration of transfer of any
Warrant Certificate, the Company and the Warrant Agent may deem and treat the registered Holder of this Warrant as the absolute owner hereof for the purpose of any exercise hereof or any distribution to the Holder, and for all other purposes. The
Warrant Agent shall not be affected by any notice to the contrary. Notwithstanding the foregoing, nothing herein shall prevent the Warrant Agent or any agent of the Warrant Agent from giving effect to any written certification, proxy or other
authorization furnished by DTC or any other depository governing the exercise of the rights of a holder of a beneficial interest in any Warrant. The rights of beneficial owners in a Warrant held in global shall be exercised by the Holder or a
Participant (as defined in the Warrant Agency Agreement) through the depository’s system, except to the extent expressly set forth in the Warrant Agency Agreement. 

  
 13 

 Section 5. Miscellaneous. 

a) No Rights as Stockholder Until Exercise. This Warrant does not entitle the Holder to any voting rights, dividends or other rights as
a stockholder of the Company prior to the exercise hereof as set forth in Section 2(d)(i), except as expressly set forth in Section 3. 

b) Loss, Theft, Destruction or Mutilation of Warrant. The Company covenants that upon receipt by the Company of evidence reasonably
satisfactory to it and the Warrant Agent of the loss, theft, destruction or mutilation of this Warrant or any stock certificate relating to the Warrant Shares, and in case of loss, theft or destruction, of indemnity or security reasonably
satisfactory to it and the Warrant Agent, and upon surrender and cancellation of such Warrant or stock certificate, if mutilated, the Company will make and cause the Warrant Agent to deliver a new Warrant or stock certificate of like tenor and dated
as of such cancellation, in lieu of such Warrant or stock certificate. 
 c) Saturdays, Sundays, Holidays, etc. If the last or
appointed day for the taking of any action or the expiration of any right required or granted herein shall not be a Business Day, then, such action may be taken or such right may be exercised on the next succeeding Business Day. 

d) Authorized Shares. 

The Company covenants that, during the period the Warrant is outstanding, it will reserve from its authorized and unissued Common Stock a
sufficient number of shares to provide for the issuance of the Warrant Shares upon the exercise of any purchase rights under this Warrant. The Company further covenants that its issuance of this Warrant shall constitute full authority to its
officers who are charged with the duty of issuing the necessary Warrant Shares upon the exercise of the purchase rights under this Warrant. The Company will take all such reasonable action as may be necessary to assure that such Warrant Shares may
be issued as provided herein without violation of any applicable law or regulation, or of any requirements of the Trading Market upon which the Common Stock may be listed. The Company covenants that all Warrant Shares which may be issued upon the
exercise of the purchase rights represented by this Warrant will, upon exercise of the purchase rights represented by this Warrant and payment for such Warrant Shares in accordance herewith, be duly authorized, validly issued, fully paid and
nonassessable and free from all taxes, liens and charges created by the Company in respect of the issue thereof (other than taxes in respect of any transfer occurring contemporaneously with such issue). 

Except and to the extent as waived or consented to by the holders of a majority of the then outstanding Warrants (based on the number of
Warrant Shares underlying such Warrants), the Company shall not by any action, including, without limitation, amending its certificate of incorporation or through any reorganization, transfer of assets, consolidation, merger, dissolution, issue or
sale of securities or any other voluntary action, avoid or seek to avoid the observance or performance of any of the terms of this Warrant, but will at all times in good faith assist in the carrying out of all such terms and in the taking of all
such actions as may be necessary or appropriate to protect the rights of Holder as set forth in this Warrant against impairment. Without limiting the generality of the foregoing, the Company will (i) not increase the par value of any Warrant
Shares above the amount payable therefor upon such exercise immediately prior to such increase in par value, (ii) take all such action as may be necessary or appropriate in order that the 

  
 14 

 
Company may validly and legally issue fully paid and nonassessable Warrant Shares upon the exercise of this Warrant and (iii) use commercially reasonable efforts to obtain all such
authorizations, exemptions or consents from any public regulatory body having jurisdiction thereof, as may be, necessary to enable the Company to perform its obligations under this Warrant. 

Before taking any action which would result in an adjustment in the number of Warrant Shares for which this Warrant is exercisable or in the
Exercise Price, the Company shall obtain all such authorizations or exemptions thereof, or consents thereto, as may be necessary from any public regulatory body or bodies having jurisdiction thereof. 

e) Governing Law. All questions concerning the construction, validity, enforcement and interpretation of this Warrant shall be governed
by and construed and enforced in accordance with the internal laws of the State of New York, without regard to the principles of conflict of laws thereof. Each party agrees that all legal proceedings concerning the interpretation, enforcement and
defense of this Warrant shall be commenced in the state and federal courts sitting in the City of New York, Borough of Manhattan (the “New York Courts”). Each party hereto hereby irrevocably submits to the exclusive jurisdiction of
the New York Courts for the adjudication of any dispute hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein (including with respect to the enforcement of any of the Transactions Documents), and hereby
irrevocably waives, and agrees not to assert in any suit, action or proceeding, any claim that it is not personally subject to the jurisdiction of such New York Courts, or such New York Courts are improper or inconvenient venue for such proceeding.
Each party hereto hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Warrant. As between a Holder and the Company, if any party
shall commence an action or proceeding to enforce any provisions of this Warrant, then the prevailing party in such action or proceeding shall be reimbursed by the other party for its attorneys’ fees and other costs and expenses incurred in the
investigation, preparation and prosecution of such action or proceeding. 
 f) Restrictions. The Holder acknowledges that the Warrant
Shares acquired upon the exercise of this Warrant, if not registered, and the Holder does not utilize cashless exercise, will have restrictions upon resale imposed by state and federal securities laws. 

g) Nonwaiver and Expenses. No course of dealing or any delay or failure to exercise any right hereunder on the part of Holder shall
operate as a waiver of such right or otherwise prejudice the Holder’s rights, powers or remedies. Without limiting any other provision of this Warrant, if the Company willfully and knowingly fails to comply with any provision of this Warrant,
which results in any material damages to the Holder, the Company shall pay to the Holder such amounts as shall be sufficient to cover any costs and expenses including, but not limited to, reasonable attorneys’ fees, including those of appellate
proceedings, incurred by the Holder in collecting any amounts due pursuant hereto or in otherwise enforcing any of its rights, powers or remedies hereunder. 

h) Notices. Any and all notices or other communications or deliveries to be provided by the Holders hereunder including, without
limitation, any Notice of Exercise, shall be in writing and delivered personally, by facsimile, e-mail (except with respect to the Warrant Agent) or sent by a nationally recognized overnight courier service,
addressed to Computershare Trust Company, 

  
 15 

 
N.A., 150 Royall Street, Canton, MA 02021, Attention: Client Services; facsimile number 781-575-4647; e-mail address: * or to BIOLASE, Inc., 4 Cromwell, Irvine, California 92618; e-mail address: [•] ; or such other facsimile number, email address or address as the Company
may specify for such purposes by notice to the Holders, with a copy to Loeb & Loeb LLP, Attention: Mitchell S. Nussbaum, Esq., 345 Park Avenue, New York, New York 10154, facsimile number 212 407 4990, email address: mnussbaum@loeb.com. Any
and all notices or other communications or deliveries to be provided by the Company hereunder shall be in writing and delivered personally, by facsimile, or sent by a nationally recognized overnight courier service addressed to each Holder at the
facsimile number or address of such Holder appearing on the books of the Company, or if no such facsimile number or address appears on the books of the Company, at the principal place of business of such Holder. Any notice or other communication or
deliveries hereunder shall be deemed given and effective on the earliest of (i) the time of transmission, if such notice or communication is delivered via facsimile or e-mail at the facsimile number (with
confirmation) or e-mail address, as applicable, set forth in this Section prior to 5:30 p.m. (New York City time) on any date, (ii) the next Trading Day after the date of transmission, if such notice or
communication is delivered via facsimile (with confirmation) or e-mail at the facsimile number or e-mail as provided in this Section on a day that is not a Trading Day
or later than 5:30 p.m. (New York City time) on any Trading Day, (iii) the first Trading Day following the date of mailing, if sent by U.S. nationally recognized overnight courier service, or (iv) upon actual receipt by the party to whom
such notice is required to be given. To the extent that any notice provided hereunder constitutes, or contains, material, non-public information regarding the Company or any subsidiaries, the Company shall
simultaneously file such notice with the Commission pursuant to a Current Report on Form 8-K. 
 i)
Limitation of Liability. No provision hereof, in the absence of any affirmative action by the Holder to exercise this Warrant to purchase Warrant Shares, and no enumeration herein of the rights or privileges of the Holder, shall give rise to
any liability of the Holder for the purchase price of any Common Stock or as a stockholder of the Company, whether such liability is asserted by the Company or by creditors of the Company. 

j) Remedies. The Holder, in addition to being entitled to exercise all rights granted by law, including recovery of damages, will be
entitled to specific performance of its rights under this Warrant. The Company agrees that monetary damages would not be adequate compensation for any loss incurred by reason of a breach by it of the provisions of this Warrant and hereby agrees to
waive and not to assert the defense in any action for specific performance that a remedy at law would be adequate. 
 k) Successors and
Assigns. Subject to applicable securities laws, this Warrant and the rights and obligations evidenced hereby shall inure to the benefit of and be binding upon the successors and permitted assigns of the Company and the successors and permitted
assigns of Holder. The provisions of this Warrant are intended to be for the benefit of any Holder from time to time of this Warrant and shall be enforceable by the Holder or holder of Warrant Shares. 

l) Amendment. This Warrant may be modified or amended or the provisions hereof waived with the written consent of the Company and
holders of a majority of the then outstanding Warrants (based on the number of Warrant Shares then underlying such Warrants), provided that if any amendment, modification or waiver disproportionately and adversely impacts a Holder (or group of
Holders), the consent of such disproportionately impacted Holder (or group of Holders) shall also be required. 

  
 16 

 m) Severability. Wherever possible, each provision of this Warrant shall be
interpreted in such manner as to be effective and valid under applicable law, but if any provision of this Warrant shall be prohibited by or invalid under applicable law, such provision shall be ineffective to the extent of such prohibition or
invalidity, without invalidating the remainder of such provisions or the remaining provisions of this Warrant. 
 n) Headings. The
headings used in this Warrant are for the convenience of reference only and shall not, for any purpose, be deemed a part of this Warrant. 

o) Warrant Agency Agreement. This Warrant is issued subject to the Warrant Agency Agreement. To the extent any provision of this
Warrant conflicts with the express provisions of the Warrant Agency Agreement, the provisions of this Warrant shall govern and be controlling; provided, however, that all provisions with respect to the rights, duties, obligations, protections,
immunities and liability of the Warrant Agent only shall be determined and interpreted solely by the provisions of the Warrant Agency Agreement. 

******************** 
 (Signature Page
Follows) 

  
 17 

 IN WITNESS WHEREOF, each of the Company and the Warrant Agent has caused this Warrant to be
executed by its respective officer thereunto duly authorized as of the date first above indicated. 
  

			
	BIOLASE, INC
		
	By:	 	  

		 	Name: John R. Beaver
		 	 Title: Executive Vice President and Chief

Financial Officer

	
	COMPUTERSHARE INC
		
	By:	 	  

		 	Name:
		 	Title:
	
	COMPUTERSHARE TRUST COMPANY, N.A.
		
	By:	 	  

		 	Name:
		 	Title:

  
 18 

 NOTICE OF EXERCISE 

 

	TO:	 COMPUTERSHARE TRUST COMPANY, N.A. 

BIOLASE, INC. [e-mail address: [•]] 

(1) The undersigned hereby elects to purchase ________ Warrant Shares of the Company pursuant to the terms of the attached Warrant (only if
exercised in full), and tenders herewith payment of the exercise price in full, together with all applicable transfer taxes, if any. 
 (2)
Payment shall take the form of (check applicable box): 
  

			
	        ☐	  	in lawful money of the United States; or
		
	        ☐	  	if permitted the cancellation of such number of Warrant Shares as is necessary, in accordance with the formula set forth in subsection 2(c)(i), to exercise this Warrant with respect to the maximum number of Warrant Shares
purchasable pursuant to the cashless exercise procedure set forth in subsection 2(c)(i).

 (3) Please issue said Warrant Shares in the name of the undersigned or in such other name as is specified
below: 
  

                          
                                         
                  
 The Warrant Shares shall be delivered to the
following DWAC Account Number: 
  

                          
                                         
                  
  

                          
                                         
                  
  

                          
                                         
                  
 [SIGNATURE OF HOLDER] 

Name of Investing Entity:
                                        
                                         
                                         
                                         
          
 Signature of Authorized Signatory of Investing Entity:
                                        
                                         
                                         
       
 Name of Authorized Signatory:
                                        
                                         
                                         
                                         

Title of Authorized Signatory:
                                        
                                         
                                         
                                         
  
 Date:
                                        
                                         
                                         
                                         
                                         

 ASSIGNMENT FORM 

(To assign the foregoing Warrant, execute this form and supply required information. Do not use this form to purchase shares.) 

FOR VALUE RECEIVED, the foregoing Warrant and all rights evidenced thereby are hereby assigned to 

 

			
	Name:	  	  

	 	  	(Please Print)
	Address:	  	  

		  	 (Please Print)

	 Phone Number:
	  	
	 Email Address:
	  	
	Dated: _______________ __, ______	  	
	Holder’s
Signature:                                       
     	  	
	Holder’s
Address:                                       
                 	  	

  
 20

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