Document:

Exhibit 4.3

SPECIMEN WARRANT CERTIFICATE

 

	NUMBER	 	[●] WARRANTS
	WA-	 	 

 

(THIS WARRANT WILL BE VOID IF NOT EXERCISED PRIOR
TO 5:00 P.M.

NEW YORK CITY TIME, FIVE YEARS FROM THE CLOSING
DATE OF THE COMPANY’S INITIAL

BUSINESS COMBINATION)

 

GARDINER HEALTHCARE ACQUISITIONS CORP.

 

CUSIP [●]

 

WARRANT

 

THIS WARRANT CERTIFIES THAT,
for value received , or registered assigns, is the registered holder of a Warrant or Warrants (the “Warrant”), expiring on
a date which is five (5) years from the completion of the Company’s initial business combination, to purchase one-half of one fully
paid and non-assessable share (the “Warrant Shares”), of common stock, par value $0.0001 per share (the “Common Stock”),
of Gardiner Healthcare Acquisitions Corp., a Delaware corporation (the “Company”), for each Warrant evidenced by this Warrant
Certificate. This Warrant Certificate is subject to and shall be interpreted under the terms and conditions of the Warrant Agreement (as
defined below).

 

The Warrant entitles the
holder thereof to purchase from the Company, from time to time, in whole or in part, commencing on the later to occur of (i) the completion
of the Company’s initial business combination or (ii) one year following the closing of the Company’s initial public offering,
such number of Warrant Shares at the price of $11.50 per share (the “Warrant Price”), upon surrender of this Warrant Certificate
and payment of the Warrant Price at the office or agency of Continental Stock Transfer & Trust Company (the “Warrant Agent”),
such payment to be made subject to the conditions set forth herein and in the Warrant Agreement, dated [●], 2021, between the Company
and the Warrant Agent (the “Warrant Agreement”). In no event shall the registered holder(s) of this Warrant be entitled to
receive a net-cash settlement in lieu of physical settlement in Warrant Shares of the Company. The Warrant Agreement provides that, upon
the occurrence of certain events, the Warrant Price and the number of Warrant Shares purchasable hereunder, set forth on the face hereof,
may be adjusted, subject to certain conditions. The term Warrant Price as used in this Warrant Certificate refers to the price per full
Warrant Share at which Warrant Shares may be purchased at the time the Warrant is exercised.

 

This Warrant will expire
on the date first referenced above if it is not exercised prior to such date by the registered holder pursuant to the terms of the Warrant
Agreement or if it is not redeemed by the Company prior to such date.

 

No fractional shares
will be issued upon any exercise of a Warrant. If, upon exercise of a Warrant, a holder would be entitled to receive a fractional
interest in a share, the Company will, upon exercise, issue or cause to be issued only the largest whole number of Warrant Shares
issuable on such exercise (and such fraction of a share will be disregarded).

 

     

     

    

 

Upon any exercise of the
Warrant for less than the total number of full Warrant Shares provided for herein, there shall be issued to the registered holder(s) hereof
or its assignee(s) a new Warrant Certificate covering the number of Warrant Shares for which the Warrant has not been exercised.

 

Warrant Certificates, when
surrendered at the office or agency of the Warrant Agent by the registered holder(s) hereof in person or by attorney duly authorized in
writing, may be exchanged in the manner and subject to the limitations provided in the Warrant Agreement, but without payment of
any service charge, for another Warrant Certificate or Warrant Certificates of like tenor and evidencing in the aggregate a like number
of Warrants.

 

Upon due presentment for
registration of transfer of the Warrant Certificate at the office or agency of the Warrant Agent, a new Warrant Certificate or Warrant
Certificates of like tenor and evidencing in the aggregate a like number of Warrants shall be issued to the transferee(s) in exchange
for this Warrant Certificate, subject to the limitations provided in the Warrant Agreement, without charge except for any applicable tax
or other governmental charge.

 

The Company and the Warrant
Agent may deem and treat the registered holder(s) as the absolute owner(s) of this Warrant Certificate (notwithstanding any notation of
ownership or other writing hereon made by anyone) for the purpose of any exercise hereof, of any distribution to the registered holder(s),
and for all other purposes, and neither the Company nor the Warrant Agent shall be affected by any notice to the contrary.

 

This Warrant does not entitle
the registered holder(s) to any of the rights of a stockholder of the Company.

 

After the Warrant becomes
exercisable and prior to its expiration date, the Company reserves the right to call the Warrant at any time, with a notice of call in
writing to the holder(s) of record of the Warrant, giving thirty (30) days’ written notice of such call if the last reported sale
price of the Common Stock has been equal to or greater than $16.50 per share for any twenty (20) trading days within a thirty (30) trading
day period ending on the third (3rd) trading day prior to the date on which notice of such call is given, provided that (i) a registration
statement under the Securities Act of 1933, as amended (the “Act”) with respect to the shares of Common Stock issuable upon
exercise must be effective and a current prospectus must be available for use by the registered holders hereof or (ii) the Warrants may
be exercised on cashless basis as set forth in the Warrant Agreement and such cashless exercise is exempt from registration under the
Act. The call price is $0.01 per Warrant Share. No fractional shares will be issued upon exercise of the Warrant.

 

If the foregoing
conditions are satisfied and the Company calls the Warrant for redemption, each holder will then be entitled to exercise his, her or
its Warrant prior to the date scheduled for redemption; provided that the Company may require the Registered Holder who desires to
exercise the Warrant, to elect cashless exercise as set forth in the Warrant Agreement, and such Registered Holder must exercise the
Warrants on a cashless basis if the Company so requires. Any Warrant either not exercised or tendered back to the Company by the end
of the date specified in the notice of call shall be canceled on the books of the Company and have no further value except for the
$0.01 call price.

 

    2

     

    

 

	By	 	 
	 	Chief Executive Officer	 

 

[REVERSE OF CERTIFICATE]

SUBSCRIPTION FORM

 

To Be Executed by the Registered Holder(s) in Order
to Exercise Warrants

 

The undersigned hereby irrevocably
elects to exercise the right, represented by this Warrant Certificate, to receive shares of Common Stock in accordance with the terms
of this Warrant Certificate and pursuant to the method selected below. Capitalized terms used herein and not otherwise defined have the
respective meanings set forth in the Warrant Certificate. PLEASE CHECK ONE METHOD OF PAYMENT:

 

	 	 	 	a “Cash Exercise” with respect to Warrant Shares; and/or
	 	 	 
	 	 	 	a “Cashless Exercise” with respect to Warrant Shares because on the date of this exercise, there is no effective registration statement registering the Warrant Shares, or the prospectus contained therein is not available for the resale of the Warrant Shares, in which event the Company shall deliver to the registered holder(s) shares of Common Stock pursuant to Section 3.3.2 of the Warrant Agreement.

 

The undersigned requests that a certificate for such shares be registered in the name(s) of:

 

	 
	(PLEASE TYPE OR PRINT NAME(S) AND ADDRESS)
	 
	 
	 
	 
	 
	 
	(SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER(S))

 

	and be delivered to	 	 
	 	 	(PLEASE PRINT OR TYPE NAME(S) AND ADDRESS)

 

and, if such number of Warrants shall not be all
the Warrants evidenced by this Warrant Certificate, that a new Warrant Certificate for the balance of such Warrants be registered in the
name of, and delivered to, the registered holder(s) at the address(es) stated below:

 

Dated:

 

	 	 
	(SIGNATURE(S))	 

 

    3

     

    

 

	 	 
	(ADDRESS(ES))	 
	 	 
	 	 
	 	 
	 	 
	(TAX IDENTIFICATION NUMBER(S))	 

 

ASSIGNMENT

 

To Be Executed by the Registered Holder in Order
to Assign Warrants

 

For Value Received, hereby sell(s), assign(s), and transfer(s) unto

 

	 
	(PLEASE TYPE OR PRINT NAME(S) AND ADDRESS(ES))
	 
	 
	 
	 
	 
	 

(SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER(S))

	and to be delivered to	 	 
	 	 	(PLEASE PRINT OR TYPE NAME(S) AND ADDRESS(ES))
	 
	 
	 
	 

(SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER(S))

 

of the Warrants represented by this Warrant Certificate,
and hereby irrevocably constitute and appoint Attorney to transfer this Warrant Certificate on the books of the Company, with full power
of substitution in the premises.

 

Dated:

 

	 	 
	(SIGNATURE(S))	 

 

NOTICE: THE SIGNATURE(S) TO THIS ASSIGNMENT MUST
CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE
WHATEVER.

 

Signature(s) Guaranteed:

 

	
    By:
	 	 

 

THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE
GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE
MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15).

 

    4Exhibit 10.6

 

EXECUTION
VERSION 

 

Gardiner Healthcare Acquisitions Corp.

3107 Warrington Road

Shaker Heights, Ohio 44120

 

March 25, 2021

 

Gardner Healthcare Holdings, LLC

3107 Warrington Road

Shaker Heights, Ohio 44120

 

RE: Securities Subscription Agreement 

 

Ladies and Gentlemen:

 

This agreement (the “Agreement”) is entered into
on March 25, 2021 by and between Gardner Healthcare Holdings, LLC, a Delaware limited liability company (the “Subscriber”
or “you”), and Gardiner Healthcare Acquisitions Corp., a Delaware corporation (the “Company”, “we”
or “us”). Pursuant to the terms hereof, the Company hereby accepts the offer the Subscriber has made to purchase 2,156,250
shares (the “Shares”) of Common Stock, $0.0001 par value per share (the “Common Stock”) up to 281,250
of which are subject to forfeiture by you if the underwriters of the initial public offering (“IPO”) of units of the
Company (the “Units”), do not fully exercise their over-allotment option (the “Over-allotment Option”).
The Company and the Subscriber’s agreements regarding such Shares are as follows:

 

1.                  
Purchase of Shares. For the sum of $25,000, which the Company acknowledges receiving in cash, the Company hereby issues the
Shares to the Subscriber, and the Subscriber hereby purchases the Shares from the Company, subject to forfeiture, on the terms and subject
to the conditions set forth in this Agreement. Concurrently with the Subscriber’s execution
of this Agreement, the Company shall, at its option, deliver to the Subscriber a certificate registered in the Subscriber’s name
representing the Shares (the “Original Certificate”), or effect such delivery in book-entry form.

 

2.                  
Representations, Warranties, and Agreements.

 

2.1         
Subscriber’s Representations, Warranties and Agreements. To induce the Company to issue the Shares to the Subscriber,
the Subscriber hereby represents and warrants to the Company and agrees with the Company as follows:

 

2.1.1         
No Government Recommendation or Approval. The Subscriber understands that no federal or state agency has passed upon or
made any recommendation or endorsement of the offering of the Shares.

 

2.1.2         
No Conflicts. The execution, delivery and performance of this Agreement and the consummation by the Subscriber of the transactions
contemplated hereby do not violate, conflict with or constitute a default under (a) the formation and governing documents of the Subscriber,
(b) any agreement, indenture or instrument to which the Subscriber is a party, or (c) any law, statute, rule or regulation to which the
Subscriber is subject, or any agreement, order, judgment or decree to which the Subscriber is subject.

 

2.1.3          Organization
and Authority. The Subscriber is a Delaware limited liability company, validly existing and in good standing under the laws of
Delaware and possesses all requisite power and authority necessary to carry out the transactions contemplated by this Agreement.
Upon execution and delivery by you, this Agreement is a legal, valid and binding agreement of Subscriber, enforceable against
Subscriber in accordance with its terms, except as such enforceability may be limited by applicable bankruptcy, insolvency,
fraudulent conveyance or similar laws affecting the enforcement of creditors’ rights generally and subject to general
principles of equity (regardless of whether enforcement is sought in a proceeding at law or in equity).

 

     

     

    

 

2.1.4        
 Experience, Financial Capability and Suitability.

 

(a)               
Subscriber is: (i) sophisticated in financial matters and is able to evaluate the risks and benefits of the investment in
the Shares and (ii) able to bear the economic risk of its investment in the Shares for an indefinite period of time because the Shares
have not been registered under the Securities Act of 1933, as amended (the “Securities Act”) and therefore cannot be
sold unless subsequently registered under the Securities Act or an exemption from such registration is available. Subscriber is capable
of evaluating the merits and risks of its investment in the Company and has the capacity to protect its own interests.

 

(b)              
Subscriber must bear the economic risk of this investment until the Shares are sold pursuant to: (i) an effective registration
statement under the Securities Act or (ii) an exemption from registration available with respect to such sale. Subscriber is able to bear
the economic risks of an investment in the Shares and to afford a complete loss of Subscriber’s investment in the Shares.

 

2.1.5         
Access to Information; Independent Investigation. Prior to the execution of this Agreement, the Subscriber has had the opportunity
to ask questions of and receive answers from representatives of the Company concerning an investment in the Company, as well as the finances,
operations, business and prospects of the Company, and the opportunity to obtain additional information to verify the accuracy of all
information so obtained. In determining whether to make this investment, Subscriber has relied solely on Subscriber’s own knowledge
and understanding of the Company and its business based upon Subscriber’s own due diligence investigation and the information furnished
pursuant to this paragraph. Subscriber understands that no person has been authorized to give any information or to make any representations
which were not furnished pursuant to this Section 2 and Subscriber has not relied on any other representations or information in
making its investment decision, whether written or oral, relating to the Company, its operations and/or its prospects.

 

2.1.6         
Regulation D Offering. Subscriber represents that it is an “accredited investor” as such term is defined in
Rule 501(a) of Regulation D promulgated under the Securities Act and acknowledges the sale contemplated hereby is being made in reliance
on a private placement exemption to “accredited investors” within the meaning of Section 501(a) of Regulation D promulgated
under the Securities Act or similar exemptions under state law.

 

2.1.7         
Investment Purposes. The Subscriber is purchasing the Shares solely for investment purposes, for the Subscriber’s
own account and not for the account or benefit of any other person, and not with a view towards the distribution or dissemination thereof.
The Subscriber did not decide to enter into this Agreement as a result of any general solicitation or general advertising within the meaning
of Rule 502(c) of Regulation D promulgated under the Securities Act.

 

2.1.8         
Restrictions on Transfer; Shell Company. Subscriber understands the Shares are being offered in a transaction not involving
a public offering within the meaning of the Securities Act. Subscriber understands the Shares will be “restricted securities”
within the meaning of section (a)(3) of Rule 144 promulgated under the Securities Act (“Rule 144”), and Subscriber
understands that the Certificates (as defined in Section 3.3) or book-entries representing the Shares will contain a legend in
respect of such restrictions. If in the future the Subscriber decides to offer, resell, pledge or otherwise transfer the Shares, such
Shares may be offered, resold, pledged or otherwise transferred only pursuant to (a) registration under the Securities Act covering such
offer, resale, pledge or other transaction or (b) an available exemption from registration. Subscriber agrees that if any transfer of
its Shares or any interest therein is proposed to be made, as a condition precedent to any such transfer, Subscriber may be required
to deliver to the Company an opinion of counsel satisfactory to the Company. Absent registration or an exemption, the Subscriber agrees
not to resell the Shares. Subscriber further acknowledges that because the Company is a shell company, Subscriber may not be able to
rely on Rule 144 promulgated under the Securities Act with respect to the resale of the Shares until one year following consummation
of the initial business combination of the Company, despite technical compliance with the requirements of Rule 144 and the release or
waiver of any contractual transfer restrictions.

 

2.1.9         
No Governmental Consents. No governmental, administrative or other third-party consents or approvals are required, necessary
or appropriate on the part of Subscriber in connection with the transactions contemplated by this Agreement.

 

    - 2 -

     

    

 

2.2           
Company’s Representations, Warranties and Agreements. To induce the Subscriber to purchase the Shares, the Company
hereby represents and warrants to the Subscriber and agrees with the Subscriber as follows:

 

2.2.1         
Organization and Corporate Power. The Company is a Delaware corporation and is qualified to do business in every jurisdiction
in which the failure to so qualify would reasonably be expected to have a material adverse effect on the financial condition, operating
results or assets of the Company. The Company possesses all requisite corporate power and authority necessary to carry out the transactions
contemplated by this Agreement.

 

2.2.2        
No Conflicts. The execution, delivery and performance of this Agreement and the consummation by the Company of the transactions
contemplated hereby do not violate, conflict with or constitute a default under (a) the certificate of incorporation or by-laws of the
Company, (b) any agreement, indenture or instrument to which the Company is a party, or (c) any law, statute, rule or regulation to which
the Company is subject, or any agreement, order, judgment or decree to which the Company is subject.

 

2.2.3         
Title to Securities. Upon issuance in accordance with, and payment pursuant to, the terms hereof, the Shares will be duly
and validly issued, fully paid and nonassessable. Upon issuance in accordance with, and payment pursuant to, the terms hereof, the Subscriber
will have or receive good title to the Shares, free and clear of all liens, claims and encumbrances of any kind, other than (a) transfer
restrictions hereunder and other agreements to which the Shares may be subject which have been notified to the Subscriber in writing,
(b) transfer restrictions under federal and state securities laws, and (c) liens, claims or encumbrances imposed due to the actions of
the Subscriber.

 

2.2.4         
No Adverse Actions. There are no actions, suits, investigations or proceedings pending, threatened against or affecting
the Company that: (a) seek to restrain, enjoin, prevent the consummation of or otherwise affect the transactions contemplated by this
Agreement or (b) question the validity or legality of any transactions or seeks to recover damages or to obtain other relief in connection
with any transactions.

 

3.            
Forfeiture of Shares.

 

3.1              
Partial or No Exercise of the Over-allotment Option. In the event the Over-allotment Option granted to the underwriters
of the IPO is not exercised in full, the Subscriber acknowledges and agrees that it (or, if applicable, it and any transferees of the
Shares (such transferees, the “Initial Stockholders”)) shall
forfeit any and all rights to such number of Shares (up to an aggregate of 281,250 Shares, pro rata based upon the percentage of the
Over-allotment Option exercised) such that immediately following such forfeiture, the Subscriber (and all other Initial Stockholders
prior to the IPO, if any) will own an aggregate number of Shares (not including any Shares issuable upon exercise of any warrants or
any shares of Common Stock, par value $0.0001 per share purchased by Subscriber or any other Initial Stockholder in the IPO or in the
aftermarket) equal to 20% of the issued and outstanding Shares immediately following the IPO.

 

    - 3 -

     

    

 

3.2          
Termination of Rights as Stockholder. If any of the Shares are forfeited in accordance with this Section 3, then
after such time the Subscriber (or Initial Stockholder or other successor in interest), shall no longer have any rights as a holder of
such forfeited Shares, and the Company shall take such action as is appropriate to cancel such forfeited Shares.

 

3.3          
Share Certificates. In the event an adjustment to the original certificates representing
the Shares (the “Original Certificates”), if any, is required pursuant to this Section 3,
then the Subscriber shall return such Original Certificates to the Company or its designated agent as soon as practicable upon its receipt
of Notice (as defined in Section 6.2) from the Company advising Subscriber of such adjustment, following which a new certificate
representing the Shares (the “New Certificate” and together with the Original Certificates, the “Certificates”),
if any, shall be issued in such amount representing the adjusted number of Shares held by the Subscriber. The New Certificate, if any,
shall be returned to the Subscriber as soon as practicable. Any such adjustment for any uncertificated securities held by the Subscriber
shall be made in book-entry form.

 

4.                  
Waiver of Liquidation Distributions; Redemption Rights. In connection with the Shares purchased pursuant to this Agreement,
the Subscriber hereby waives any and all right, title, interest or claim of any kind in or to any distributions by the Company from the
trust account, which will be established for the benefit of the Company’s public stockholders and into which substantially all of
the proceeds of the IPO will be deposited (the “Trust Account”), in the event of a liquidation of the Company upon
the Company’s failure to timely complete an initial business combination. For purposes of clarity, in the event the Subscriber purchases
Units in the IPO or shares of Common Stock in the aftermarket, any additional shares of Common Stock included in the Units or shares of
Common Stock so purchased shall be eligible to receive any liquidating distributions by the Company. However, in no event will the Subscriber
have the right to redeem any Shares into funds held in the Trust Account upon the successful completion of an initial business combination.

 

5.                  
Restrictions on Transfer.

 

5.1         
Securities Law Restrictions. In addition to any restrictions to be contained in that certain letter agreement (commonly
known as an “Insider Letter”) by and between Subscriber and the Company to be dated as of the closing of the IPO, Subscriber
agrees not to sell, transfer, pledge, hypothecate or otherwise dispose of all or any part of the Shares unless, prior thereto (a) a registration
statement on the appropriate form under the Securities Act and applicable state securities laws with respect to the offer and sale of
the Shares proposed to be transferred shall then be effective or (b) the Company has received an opinion from counsel reasonably satisfactory
to the Company, that such registration is not required because such transaction is exempt from registration (i) under the Securities Act
and the rules promulgated thereunder by the Securities and Exchange Commission and (ii) with respect to all applicable state securities
laws. 

 

5.2          
Lock-up. Subscriber acknowledges that the Shares will be subject to lock-up provisions
(the “Lock-up”) contained in the Insider Letter.

 

    - 4 -

     

    

 

5.3         
 Restrictive Legends. Any Certificates shall have endorsed thereon legends substantially as follows:

 

“THE OFFER AND SALE OF THE SECURITIES REPRESENTED
HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY STATE SECURITIES LAWS AND NEITHER THE SECURITIES
NOR ANY INTEREST THEREIN MAY BE OFFERED, SOLD, TRANSFERRED, PLEDGED OR OTHERWISE DISPOSED OF EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION
STATEMENT COVERING SUCH OFFER, SALE, TRANSFER, PLEDGE OR OTHER DISPOSAL UNDER SUCH ACT OR SUCH LAWS OR AN EXEMPTION FROM REGISTRATION
UNDER SUCH ACT AND SUCH LAWS WHICH, IN THE OPINION OF COUNSEL, IS AVAILABLE.”

 

“THE SECURITIES REPRESENTED BY THIS CERTIFICATE
ARE SUBJECT TO A LOCKUP AND MAY NOT BE OFFERED, SOLD, TRANSFERRED, PLEDGED OR OTHERWISE DISPOSED DURING THE TERM OF THE LOCKUP.”

 

5.4           
Additional Shares or Substituted Securities. In the event of the declaration of a share dividend, the declaration of an
extraordinary dividend payable in a form other than Common Stock, a spin-off, a share split, an adjustment in conversion ratio, a recapitalization
or a similar transaction affecting the Company’s outstanding shares of Common Stock without receipt of consideration, any new, substituted
or additional securities or other property, which are by reason of such transaction distributed with respect to any Shares subject to
this Section 5 or into which such Shares thereby become convertible shall immediately be subject to this Section 5 and Section
3. Appropriate adjustments to reflect the distribution of such securities or property shall be made to the number or class of Shares
subject to this Section 5 and Section 3.

 

5.5          
Registration Rights. Subscriber acknowledges that the Shares are being purchased pursuant to an exemption from the registration
requirements of the Securities Act and will become freely-tradable only after certain conditions are met or the offer and sale of the
Shares is registered under the Securities Act pursuant to that certain registration rights agreement to be dated as of the closing of
the IPO by and between Subscriber, the Company, and the other parties thereto (the “Registration Rights Agreement”)
prior to the closing of the IPO.

 

6.                  
Other Agreements.

 

6.1           
Further Assurances. Subscriber agrees to execute such further instruments and to take such further action as may reasonably
be necessary to carry out the intent of this Agreement.

 

6.2          
Notices. All notices, requests, consents, claims, demands, waivers, and other communications hereunder (each, a “Notice”)
shall be in writing and addressed to the parties at the addresses set forth on the first page of this Agreement (or to such other address
that may be designated by the receiving party from time to time in accordance with this Section 6.2). A Notice shall be deemed
to have been given (a) when delivered by hand (with written confirmation of receipt); (b) when received by the addressee if sent by a
nationally recognized overnight courier (receipt requested); (c) on the date sent by facsimile or email (with confirmation of transmission)
if sent during normal business hours of the recipient, and on the next business day if sent after normal business hours of the recipient;
or (d) on the third day after the date mailed, by certified or registered mail (in each case, return receipt requested, postage pre-paid).

 

6.3           
Entire Agreement. This Agreement, together with the Insider Letter and the Registration Rights Agreement, each substantially
in the form to be filed as an exhibit to the Registration Statement on Form S-1 associated with the Company’s IPO, embodies the
entire agreement and understanding between the Subscriber and the Company with respect to the subject matter hereof and supersedes all
prior oral or written agreements and understandings relating to the subject matter hereof. No statement, representation, warranty, covenant
or agreement of any kind not expressly set forth in this Agreement shall affect, or be used to interpret, change or restrict, the express
terms and provisions of this Agreement.

 

    - 5 -

     

    

 

6.4          
Modifications and Amendments. The terms and provisions of this Agreement may be modified or amended only by written agreement
executed by all parties hereto.

 

6.5           
Assignment. The rights and obligations under this Agreement may not be assigned by either party hereto without the prior
written consent of the other party.

 

6.6           
Successors and Assigns; No Third-Party Beneficiaries. This Agreement shall be binding upon and shall inure to the benefit
of the parties hereto and their respective permitted successors and permitted assigns. This Agreement is for the sole benefit of the parties
hereto and their respective successors and permitted assigns and nothing herein, express or implied, is intended to or shall confer upon
any other person or entity any legal or equitable right, benefit, or remedy of any nature whatsoever under or by reason of this Agreement.

 

6.7          
Governing Law. This Agreement and the rights and obligations of the parties hereunder shall be construed in accordance with
and governed by the laws of New York applicable to contracts wholly performed within the borders of such state, without giving effect
to the conflict of law principles thereof.

 

6.8          
Severability. In the event that any court of competent jurisdiction shall determine that any provision, or any portion thereof,
contained in this Agreement shall be unreasonable or unenforceable in any respect, then such provision shall be deemed limited to the
extent that such court deems it reasonable and enforceable, and as so limited shall remain in full force and effect. In the event that
such court shall deem any such provision, or portion thereof, wholly unenforceable, the remaining provisions of this Agreement shall nevertheless
remain in full force and effect.

 

6.9          
Waivers and Consents. No waiver by any party of any of the provisions hereof shall be effective unless explicitly set forth
in writing and signed by the party so waiving. No waiver by any party shall operate or be construed as a waiver in respect of any failure,
breach, or default not expressly identified by such written waiver, whether of a similar or different character, and whether occurring
before or after that waiver. No failure to exercise, or delay in exercising, any right, remedy, power, or privilege arising from this
Agreement shall operate or be construed as a waiver thereof; nor shall any single or partial exercise of any right, remedy, power, or
privilege hereunder preclude any other or further exercise thereof or the exercise of any other right, remedy, power, or privilege. No
Notice on a party not expressly required under this Agreement shall entitle the party receiving such Notice to any other or further Notice
in similar or other circumstances or constitute a waiver of the rights of the party giving such Notice to any other or further action
in any circumstances without such Notice.

 

6.10          
Survival of Representations and Warranties. All representations and warranties made by the parties hereto in this Agreement
or in any other agreement, certificate or instrument provided for or contemplated hereby, shall survive the execution and delivery hereof
and any investigations made by or on behalf of the parties.

 

6.11           No
Broker or Finder. Each of the parties hereto represents and warrants to the other that no broker, finder or other financial
consultant has acted on its behalf in connection with this Agreement or the transactions contemplated hereby in such a way as to
create any liability on the other. Each of the parties hereto agrees to indemnify and save the other harmless from any claim or
demand for commission or other compensation by any broker, finder, financial consultant or similar agent claiming to have been
employed by or on behalf of such party and to bear the cost of legal expenses incurred in defending against any such claim.

 

    - 6 -

     

    

 

6.12         
Headings and Captions. The headings and captions of the various subdivisions of this Agreement are for convenience of reference
only and shall in no way modify or affect the meaning or construction of any of the terms or provisions hereof.

 

6.13         
Counterparts. This Agreement may be executed in one or more counterparts, all of which when taken together shall be considered
one and the same agreement and shall become effective when counterparts have been signed by each party and delivered to the other party,
it being understood that both parties need not sign the same counterpart. In the event that any signature is delivered by facsimile transmission
or any other form of electronic delivery, such signature shall create a valid and binding obligation of the party executing (or on whose
behalf such signature is executed) with the same force and effect as if such signature page were an original thereof.

 

6.14         
Construction. The parties hereto have participated jointly in the negotiation and drafting of this Agreement. If an ambiguity
or question of intent or interpretation arises, this Agreement will be construed as if drafted jointly by the parties hereto and no presumption
or burden of proof will arise favoring or disfavoring any party hereto because of the authorship of any provision of this Agreement. The
words “include,” “includes,” and “including” will be deemed to be followed by
 “without limitation.” Pronouns in masculine, feminine, and neuter genders will be construed to include any other gender,
and words in the singular form will be construed to include the plural and vice versa, unless the context otherwise requires. The words
 “this Agreement,” “herein,” “hereof,” “hereby,” “hereunder,”
and words of similar import refer to this Agreement as a whole and not to any particular subdivision unless expressly so limited. The
parties hereto intend that each representation, warranty, and covenant contained herein will have independent significance. If any party
hereto has breached any representation, warranty, or covenant contained herein in any respect, the fact that there exists another representation,
warranty or covenant relating to the same subject matter (regardless of the relative levels of specificity) which such party hereto has
not breached will not detract from or mitigate the fact that such party hereto is in breach of the first representation, warranty, or
covenant.

 

6.15         
Mutual Drafting. This Agreement is the joint product of the Subscriber and the Company and each provision hereof has been
subject to the mutual consultation, negotiation and agreement of such parties and shall not be construed for or against any party hereto.

 

7.                  
Voting and Tender of Shares. The Subscriber agrees to vote the Shares in favor of an initial business combination that the
Company negotiates and submits for approval to the Company’s stockholders and the Subscriber shall not seek redemption with respect
to such Shares. Additionally, the Subscriber agrees not to tender any Shares in connection with a tender offer presented to the Company’s
stockholders in connection with an initial business combination negotiated by the Company.

 

8.                  
Indemnification. Each party shall indemnify the other against any loss, cost or damages (including reasonable attorney’s
fees and expenses) incurred as a result of such party’s breach of any representation, warranty, covenant or agreement in this Agreement.

 

[Signature Page Follows]

 

    - 7 -

     

    

 

If the foregoing accurately sets forth our understanding
and agreement, please sign the enclosed copy of this Agreement and return it to us.

 

	 	Very truly yours,

 

	 	Gardiner Healthcare Acquisitions Corp.

 

	 	By:  	/s/ Marc F. Pelletier PhD
	 	Name: Marc F. Pelletier, PhD
	 	Title: Chairman & Chief Executive Officer

 

Accepted and agreed as of the date first written above.

 

Gardner Healthcare Holdings, LLC

 

	By:	Gardiner Healthcare Acquisitions, LLC

Its Member

 

	By:  	/s/ Marc F. Pelletier, PhD	 
		Name:  Marc F. Pelletier, PhD	
		Title:    Managing Member	

 

 

[Signature Page to Subscription Agreement]

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