EX-4.2





 Exhibit 4.2 

FORM OF 
 PRE-FUNDED COMMON STOCK PURCHASE WARRANT 
 BIOLASE, INC. 

 

			
	Warrant Shares: [                ]	  	Initial Exercise Date: [    ], 2023
		
		  	Issue Date: [    ], 2023

 THIS PRE-FUNDED COMMON STOCK PURCHASE WARRANT (this
“Warrant”) certifies that, for value received, [                    ], or [his/her/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 until this
Warrant is exercised in full (the “Termination Date”) but not thereafter, to subscribe for from Biolase, Inc., a Delaware corporation (the “Company”), up to [    ] shares (as subject to
adjustment hereunder, the “Warrant Shares”) of common stock of the Company, par value $0.001 per share (“Common Stock”). The subscription price of one share of Common Stock under this Warrant shall be equal to the
Aggregate Exercise Price, as defined in Section 2(b). This Warrant is being issued pursuant to that certain Underwriting Agreement (as defined herein). This Warrant shall initially be issued and maintained in certificated form. 

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 is then reported on the Pink Open Market (or a similar organization or agency succeeding to
its functions of reporting prices), the most recent bid price per share of 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 other than Saturday, Sunday or other day on which commercial banks in The City of New York are
authorized or required by law to remain closed; provided, however, for clarification, commercial banks shall not be deemed to be authorized or required by law to remain closed due to “stay at home”, “shelter-in-place”, “non-essential employee” or any other similar orders or restrictions or the closure of any physical branch locations at the
direction of any governmental authority so long as the electronic funds transfer systems (including for wire transfers) of commercial banks in The City of New York generally are open for use by customers on such day. 

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

“Common Stock Equivalents” means any securities of the Company or the Subsidiaries which would entitle the holder thereof to
acquire at any time shares of 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, shares of 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,
as amended (File No. 333-268528). 
 “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) or the OTCQX, OTCQB or other applicable U.S. over-the-counter market. 
 “Transfer Agent”
means Computershare Trust Company, N.A., the current transfer agent of the Company, and any successor transfer agent of the Company. 

“Underwriting Agreement” means that certain underwriting agreement, dated [    ], 2023, between
the Company and Lake Street Capital Markets, LLC, as representative of the underwriters named therein, as amended, modified or supplemented from time to time in accordance with its terms. 

“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
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 is then reported on the Pink Open Market (or a similar organization or agency
succeeding to its functions of reporting prices), the most recent bid price per share of 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. 

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

a)     Exercise of Warrant. Subject to the provisions of Section 2(e) hereof, exercise of the
subscription 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 Company 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 as Exhibit A (the “Notice of Exercise”), and,
unless the cashless exercise procedure specified in Section 2(c) below is specified in the applicable Notice of Exercise, delivery of the aggregate Exercise Price of the Warrant Shares specified in the applicable Notice of Exercise as specified
in this Section 2(a). 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 of immediately available funds 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. Notwithstanding anything herein to the
contrary, the Holder shall not be required to physically surrender this Warrant to the Company until the Holder has subscribed for 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 subscriptions for a portion
of the total number of Warrant Shares available hereunder shall have the effect of lowering the outstanding number of Warrant Shares issuable hereunder in an amount equal to the applicable number of Warrant Shares subscribed for. The Holder and the
Company shall maintain records showing the number of Warrant Shares subscribed for and the date of such subscriptions. The Company shall deliver any objection to any Notice of Exercise within one (1) Trading Day of receipt of such notice.
The Holder and any assignee, by acceptance of this Warrant, acknowledge and agree that, by reason of the provisions of this paragraph, following the subscription for a portion of the Warrant Shares hereunder, the number of Warrant Shares
available for subscription hereunder at any given time may be less than the amount stated on the face hereof. 
 b)
    Exercise Price. The aggregate exercise price of this Warrant, except for a nominal exercise price of $0.01 per Warrant Share, was pre-funded to the Company on or prior to the
Initial Exercise Date and, consequently, no additional consideration (other than the nominal exercise price of $0.01 per Warrant Share) shall be required to be paid by the Holder to the Company to effect any exercise of this Warrant. The Holder
shall not be entitled to the return or refund of all, or any portion, of such pre-paid aggregate exercise price under any circumstance or for any reason whatsoever. The remaining unpaid exercise price per
share of Common Stock under this Warrant shall be $0.01, subject to adjustment hereunder (the “Exercise Price”). 

c)     Cashless Exercise. 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 over the 5 Trading Days immediately preceding the date of the applicable
Notice of Exercise if such Notice of Exercise is (1) delivered pursuant to Section 2(a) hereof on a day that is not a Trading Day or (2) delivered pursuant to Section 2(a) hereof on a Trading Day prior to the opening of, or
during, “regular trading hours” (as defined in Rule 600(b) of Regulation NMS promulgated under the federal securities laws) on such Trading Day, or (ii) the VWAP over the 5 consecutive Trading Days immediately ending on and including
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 delivered pursuant to Section 2(a) hereof after the close of “regular trading hours” on Trading Day;



  

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



 

	 	(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. 


 If
Warrant Shares are issued in such a cashless exercise, the Company and Holder each acknowledge and the Company agrees 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 subscribed for 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, including the 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 Company of the Notice of Exercise, provided that payment of the
aggregate Exercise Price (other than in the instance of a cashless exercise) is received by the Company one (1) Trading Day prior to such second Trading Day after the delivery of the Notice of Exercise, (ii) one (1) Trading Day after
delivery of the aggregate Exercise Price to the Company and (iii) the number of Trading Days comprising the Standard Settlement Period after the delivery to the Company of the Notice of Exercise, provided that payment of the aggregate Exercise
Price (other than in the instance of a cashless exercise) is received by the Company one (1) Trading Day prior to such second Trading Day after the delivery of the aggregate Exercise Price to the Company (such date, the “Warrant Share
Delivery Date”). For the purposes of Regulation SHO under the Exchange Act, 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. If the Company fails for any reason to deliver or cause the delivery to the Holder the
Warrant Shares subject to a Notice of Exercise by the Warrant Share Delivery Date, the Company shall pay to the Holder, in cash, as liquidated damages and not as a penalty, for each $1,000 of Warrant Shares subject to such exercise (based on the
VWAP of the Common Stock on the date of the applicable Notice of Exercise), $5 per Trading Day (increasing to $10 per Trading Day on the tenth Trading Day after the Warrant Share Delivery Date) for each Trading Day after such Warrant Share Delivery
Date until such Warrant Shares are delivered or Holder rescinds such exercise; provided that such liquidated damages shall in no event exceed an aggregate of $100 per $1,000 of Warrant Shares. 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. Notwithstanding the foregoing, with respect to any Notice(s) of Exercise delivered on or prior to 12:00 p.m. (New York City time)
on the Initial Exercise Date, which may be delivered at any time after the time of execution of the Underwriting Agreement, the Company agrees to deliver the Warrant Shares subject to such notice(s) by 4:00 p.m. (New York City time) on the Initial
Exercise Date and the Initial Exercise Date shall be the Warrant Share Delivery Date for purposes hereunder. Notwithstanding anything to the contrary contained herein, the Company shall not be required to deliver any shares of Common Stock upon a
cash exercise of a Warrant unless or until the aggregate Exercise Price with respect to such exercise has been delivered to the Company. 

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, deliver to the Holder a new Warrant evidencing the rights of the Holder to subscribe for the unsubscribed for Warrant Shares called
for by this Warrant, which new Warrant shall in all other respects be identical with this Warrant. 
 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;
provided, however, that the Holder shall be required to return any Warrant Shares subject to any such rescinded exercise notice concurrently with the return to Holder of the aggregate Exercise Price paid to the Company for such Warrant
Shares and the restoration of Holder’s right to acquire such Warrant Shares pursuant to this Warrant (including, issuance of a replacement warrant certificate evidencing such restored right). 

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
(other than as a result of failure of the Holder to timely deliver the aggregate Exercise Price, unless the Warrant is validly exercised by means of a cashless exercise), 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; provided that the
Holder shall have no right to any such amount hereunder to the extent the failure of the Company to deliver such Warrant Shares is caused by the Holder’s failure to provide complete information required to be provided by the Holder to the
Company hereunder or the inaccuracy of any such information. For example, if the Holder purchases shares of Common Stock having a total purchase price of $11,000 to cover a Buy-In with respect to an attempted
exercise of this Warrant to subscribe for shares of Common Stock with an aggregate exercise 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 subscribe for 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, this Warrant when surrendered for exercise shall be accompanied by the Assignment Form attached hereto as Exhibit B 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 Company shall not 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 (as if applicable hereto) 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, and a submission of a Notice of Exercise shall be deemed a representation and warranty by the Holder of the foregoing determination. In addition, a determination by the Holder 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, and the Company shall have no obligation to verify or confirm the accuracy of such determination and shall have
no liability for exercises of the Warrant that are not in compliance with the Beneficial Ownership Limitation (other than to the extent that information on the number of outstanding shares of Common Stock is provided by the Company and relied upon
by the Holder). For purposes of this Section 2(e), in determining the total number of outstanding shares of Common Stock, a Holder may rely on the total number of outstanding shares of Common Stock as reflected in (A) the Company’s
most recent periodic or annual report filed 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 request of a Holder, the Company shall within one Trading Day confirm 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% (or, upon election by a Holder prior to the issuance of any Warrants, 9.99%) of the number of shares of Common Stock outstanding immediately
after giving effect to the issuance 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 shall in no event exceed 9.99% of the number of shares of 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 ownership of shares of Common Stock in excess of 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) in order to correct this paragraph (or any portion hereof), if necessary, 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)     Notwithstanding any other provision to the
contrary, the Holder acknowledges and the Company agrees that the Company shall not be obliged to issue, and no shares of capital stock (including, for the avoidance of doubt, any shares of Common Stock) of the Company shall be issued, for less than
the nominal value thereof (being, $0.01 per share of Common Stock as of the date hereof). 
 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 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 or any other Warrants), (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 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 (provided, that such adjustment shall be reversed if such dividend or
distribution is terminated prior to the making thereof) and shall become effective immediately after the effective date in the case of a subdivision, combination or re-classification. 

b)     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 Common Stock are to be determined for the grant, issue or sale of such Purchase Rights (provided, however, that, 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). 
 c)     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 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) (except to the extent an adjustment
was already made pursuant to Section 3(a)) (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 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). 
 d)     Fundamental Transaction. Other than the
issuance of securities in connection with the Company’s public offering registered on the Registration Statement and pursuant to which this Warrant is being issued, 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 (and all of its Subsidiaries, taken as a whole), directly or indirectly effects any
sale, lease, license, assignment, transfer, conveyance or other disposition of all or substantially all of its assets in one or a series of related transactions, except to the extent subject to an adjustment pursuant to Section 3(a), (b) or
(c), (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 shares of 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,
merger, 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 (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. 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(d) 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. 












 e)     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. 
 f)
    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, except for any recurring cash dividend (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 five (5) Business
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 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 substantially contemporaneously 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. 

Section 4. Transfer of Warrant. 

a)     Transferability. 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 principal office of the Company or its designated agent, together with a written assignment of this Warrant substantially in the form attached hereto
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. Upon such surrender and, if required, such payment, the Company 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 five (5) Trading Days of the date on which the Holder delivers an assignment form to the Company assigning this Warrant in full. This
Warrant, if properly assigned in accordance herewith, may be exercised by a new holder for the subscription for 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
depository), 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, the Company 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 Company shall
register this Warrant, upon records to be maintained by the Company for that purpose (the “Warrant Register”), in the name of the record Holder hereof from time to time. The Company 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, absent actual notice to the contrary. 

Section 5. Miscellaneous. 

a)     No Rights as Stockholder Until Exercise; No Settlement in Cash. 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. Without limiting any rights of a Holder to
receive Warrant Shares on a “cashless exercise” pursuant to Section 2(c) or to receive cash payments pursuant to Section 2(d)(i) and Section 2(d)(iv) herein, in no event shall the Company be required to net cash settle an
exercise of this Warrant. 
 b)     Loss, Theft, Destruction or Mutilation of Warrant. The Company
covenants that upon receipt by the Company of evidence reasonably satisfactory to it 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 upon surrender and cancellation of such Warrant or stock certificate, if mutilated, the Company will make and 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 Trading Day, then, such action may be taken or such right may be exercised on the next succeeding Trading
Day. 
 d)     Authorized Shares. The Company covenants that, during the period the Warrant is
outstanding, it will reserve from its authorized and unissued shares of Common Stock a sufficient number of shares to provide for the issuance of the Warrant Shares upon the exercise of any subscription 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 subscription 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 subscription rights represented by this Warrant will, upon exercise of the subscription rights represented by this Warrant and payment of the Exercise
Price 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 articles 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 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)     Jurisdiction. The validity, interpretation, and performance of this Warrant and of the
Warrants shall be governed in all respects by the laws of the State of New York, without giving effect to conflicts of law principles that would result in the application of the substantive laws of another jurisdiction. The Company and, by
acceptance hereof, the Holder hereby agree that any action, proceeding or claim against it arising out of or relating in any way to this Warrant shall be brought and enforced in the courts of the State of New York or the United States District Court
for the Southern District of New York, and irrevocably submit to such jurisdiction, which jurisdiction shall be exclusive. The Company and, by acceptance hereof, the Holder, hereby waive any objection to such exclusive jurisdiction and that such
courts represent an inconvenience forum. Any such process or summons to be served upon the Company or the Holder may be served by transmitting a copy thereof by registered or certified mail, return receipt requested, postage prepaid, addressed to it
at the address set forth in Section 5(h) hereof. Such mailing shall be deemed personal service and shall be legal and binding upon the Company or the Holder, as applicable, in any action, proceeding or claim. 

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 the Company or the Holder shall operate as a waiver of such right or otherwise prejudice the rights, powers or remedies of the other. Without limiting any other provision of this Warrant, if either the Company or the Holder
willfully and knowingly fails to comply with any provision of this Warrant, which results in any material damages to the other, such defaulting party shall pay to the non-defaulting party 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 such non-defaulting party 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 or sent by a nationally recognized overnight courier service, addressed to the Company, at 27042 Towne Centre Drive, Suite 270, Lake Forest, California 92610, Attention: John R. Beaver, email
address: jbeaver@biolase.com, or such other facsimile number, email address or address as 












 
the Company may specify for such purposes by notice to the Holders. 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 e-mail, or sent by a nationally recognized overnight courier service addressed to each Holder at the facsimile number, e-mail
address or address of such Holder appearing on the books of the Company. Any notice or other communication or deliveries hereunder shall be deemed given and effective on the earliest of (a) the time of transmission, if such notice or
communication is delivered via facsimile at the facsimile number or e-mail (or e-mail attachment) at the email address set forth on the signature pages attached hereto
at or prior to 5:30 p.m. (New York City time) on a Trading Day, (b) the next Trading Day after the date of transmission, if such notice or communication is delivered via facsimile at the facsimile number or
e-mail (or e-mail attachment) at the e-mail address as set forth on the signature pages attached hereto on a day that is not a
Trading Day or later than 5:30 p.m. (New York City time) on any Trading Day, (c) the second (2nd) Trading Day following the date of mailing, if sent by U.S. nationally recognized overnight courier service or (d) 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 share of 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 seek 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 and the terms hereof, 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, on the one hand, and the Holder, on the other hand. 
 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. 

m)     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. 
 ******************** 

(Signature Page Follows) 












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

					
	BIOLASE, INC.
		
	By:	 	  

		 	Name: John R. Beaver
		 	Title:   Chief Executive Officer














 EXHIBIT A 

NOTICE OF EXERCISE 
 TO: BIOLASE,
INC. 
 (1) The undersigned hereby elects to subscribe for
                     Warrant Shares of the Company pursuant to the terms of the attached Warrant (only required 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 by wire transfer; 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), to exercise this Warrant with respect to the maximum number of Warrant Shares issuable pursuant to the cashless exercise procedure set forth in subsection 2(c). 

(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:
                                         
                                         
                                         
                                         
               












 EXHIBIT B 

ASSIGNMENT FORM 
 (To
assign the foregoing Warrant, execute this form and supply the 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: