Exhibit 10.3


 


INVESTMENT MANAGEMENT TRUST AGREEMENT


 


This Investment Management
Trust Agreement (this “Agreement”) is made effective as of [●], 2021 by and between Shelter Acquisition
Corporation I, a Delaware corporation (the “Company”), and Continental Stock Transfer & Trust Company,
a New York corporation (the “Trustee”).


 


WHEREAS, the Company’s
registration statement on Form S-1, File No. 333-253213 (the “Registration Statement”) and prospectus
(the “Prospectus”) for the initial public offering of the Company’s units (the “Units”),
each of which consists of one share of the Company’s Class A common stock, par value $0.0001 per share (the “Common
Stock”), and one-half of one redeemable warrant, each whole warrant entitling the holder thereof to purchase
one share of Common Stock (such initial public offering hereinafter referred to as the “Offering”), has
been declared effective as of the date hereof by the U.S. Securities and Exchange Commission; and


 


WHEREAS, the Company
has entered into an Underwriting Agreement (the “Underwriting Agreement”) with Citigroup Global Markets
Inc. and Wells Fargo Securities, LLC, collectively, as representatives (the “Representatives”) of the
several underwriters (the “Underwriters”) named therein; and


 


WHEREAS, as described
in the Prospectus, $200,000,000 of the gross proceeds of the Offering and sale of the Private Placement Warrants (as defined in
the Underwriting Agreement) (or $230,000,000 if the Underwriters’ option to purchase additional Units is exercised in full)
will be delivered to the Trustee to be deposited and held in a segregated trust account located at all times in the United States
(the “Trust Account”) for the benefit of the Company and the holders of shares of Common Stock included
in the Units issued in the Offering as hereinafter provided (the amount to be delivered to the Trustee (and any interest subsequently
earned thereon) is referred to herein as the “Property,” the stockholders for whose benefit the
Trustee shall hold the Property will be referred to as the “Public Stockholders,” and the Public
Stockholders and the Company will be referred to together as the “Beneficiaries”); and


 


WHEREAS, pursuant to
the Underwriting Agreement, a portion of the Property equal to $7,000,000, or $8,050,000 if the Underwriters’ option to purchase
additional Units is exercised in full, is attributable to deferred underwriting discounts and commissions that will be payable
by the Company to the Underwriters upon the consummation of the Business Combination (as defined below) (the “Deferred
Discount”); and


 


WHEREAS, the Company
and the Trustee desire to enter into this Agreement to set forth the terms and conditions pursuant to which the Trustee shall hold
the Property.


 


NOW THEREFORE, IT IS
AGREED:


 


1. Agreements
and Covenants of Trustee. The Trustee hereby agrees and covenants to:


 


(a) Hold
the Property in trust for the Beneficiaries in accordance with the terms of this Agreement in the Trust Account established by
the Trustee in the United States at J.P. Morgan Chase Bank, N.A. (or at another U.S. chartered commercial bank with consolidated
assets of $100 billion or more) in the United States, maintained by Trustee and at a brokerage institution selected by the Trustee
that is reasonably satisfactory to the Company;


 


(b) Manage,
supervise and administer the Trust Account subject to the terms and conditions set forth herein;


 


(c) In
a timely manner, upon the written instruction of the Company, invest and reinvest the Property in United States government securities
within the meaning of Section 2(a)(16) of the Investment Company Act of 1940, as amended, having a maturity of 185 days or less,
or in money market funds meeting the conditions of paragraphs (d)(1), (d)(2), (d)(3) and (d)(4) of Rule 2a-7 promulgated under
the Investment Company Act of 1940, as amended (or any successor rule), which invest only in direct U.S. government treasury obligations,
as determined by the Company; the Trustee may not invest in any other securities or assets, it being understood that the Trust
Account will earn no interest while account funds are uninvested awaiting the Company’s instructions hereunder and the Trustee
may earn bank credits or other consideration;


 






    


     


    

 


(d) Collect
and receive, when due, all principal, interest or other income arising from the Property, which shall become part of the Property,
as such term is used herein;


 


(e) Promptly
notify the Company and the Representatives of all communications received by the Trustee with respect to any Property requiring
action by the Company;


 


(f) Supply
any necessary information or documents as may be requested by the Company (or its authorized agents) in connection with the Company’s
preparation of the tax returns relating to assets held in the Trust Account;


 


(g) Participate
in any plan or proceeding for protecting or enforcing any right or interest arising from the Property if, as and when instructed
by the Company to do so;


 


(h) Render
to the Company monthly written statements of the activities of, and amounts in, the Trust Account reflecting all receipts and disbursements
of the Trust Account;


 


(i) Commence
liquidation of the Trust Account only after and promptly after (x) receipt of, and only in accordance with, the terms of a letter
from the Company (“Termination Letter”) in a form substantially similar to that attached hereto as either
Exhibit A or Exhibit B, as applicable, signed on behalf of the Company by its Chief Executive Officer, Chief Financial
Officer or other authorized officer of the Company, and complete the liquidation of the Trust Account and distribute the Property
in the Trust Account, including interest earned on the funds held in the Trust Account and not previously released to the Company
to pay its income taxes (less up to $100,000 of interest to pay dissolution expenses), only as directed in the Termination Letter
and the other documents referred to therein, or (y) upon the date which is the later of (1) 18  months after the closing of the
Offering and (2) such later date as may be approved by the Company’s stockholders in accordance with the Company’s
amended and restated certificate of incorporation, if a Termination Letter has not been received by the Trustee prior to such date,
in which case the Trust Account shall be liquidated in accordance with the procedures set forth in the Termination Letter attached
as Exhibit B and the Property in the Trust Account, including interest earned on the funds held in the Trust Account and
not previously released to the Company to pay its income taxes (less up to $100,000 of interest to pay dissolution expenses), shall
be distributed to the Public Stockholders of record as of such date. It is acknowledged and agreed that there should be no reduction
in the principal amount per share initially deposited in the Trust Account;


 


(j) Upon
written request from the Company, which may be given from time to time in a form substantially similar to that attached hereto
as Exhibit C, withdraw from the Trust Account and distribute to the Company the amount of interest earned on the Property
requested by the Company to cover any tax obligation owed by the Company as a result of assets of the Company or interest or other
income earned on the Property, which amount shall be delivered directly to the Company by electronic funds transfer or other method
of prompt payment, and the Company shall forward such payment to the relevant taxing authority, so long as there is no reduction
in the principal amount initially deposited in the Trust Account; provided, however, that to the extent there is
not sufficient cash in the Trust Account to pay such tax obligation, the Trustee shall liquidate such assets held in the Trust
Account as shall be designated by the Company in writing to make such distribution (it being acknowledged and agreed that any such
amount in excess of interest income earned on the Property shall not be payable from the Trust Account). The written request of
the Company referenced above shall constitute presumptive evidence that the Company is entitled to said funds, and the Trustee
shall have no responsibility to look beyond said request;


 


(k) Upon
written request from the Company, which may be given from time to time in a form substantially similar to that attached hereto
as Exhibit D, the Trustee shall distribute to the remitting brokers on behalf of Public Stockholders redeeming Common
Stock the amount required to pay redeemed Common Stock from Public Stockholders pursuant to the Company’s amended and restated
certificate of incorporation; and


 


(l) Not
make any withdrawals or distributions from the Trust Account other than pursuant to Sections 1(i), 1(j) or 1(k)
above.


 






    2


     


    

 


2. Agreements
and Covenants of the Company. The Company hereby agrees and covenants to:


 


(a) Give
all instructions to the Trustee hereunder in writing, signed by the Company’s Chief Executive Officer, Chief Financial Officer
or other authorized officer of the Company. In addition, except with respect to its duties under Sections 1(i), 1(j)
or 1(k) hereof, the Trustee shall be entitled to rely on, and shall be protected in relying on, any verbal or telephonic
advice or instruction which it, in good faith and with reasonable care, believes to be given by any one of the persons authorized
above to give written instructions, provided that the Company shall promptly confirm such instructions in writing;


 


(b) Subject
to Section 4 hereof, hold the Trustee harmless and indemnify the Trustee from and against any and all expenses, including
reasonable counsel fees and disbursements, or losses suffered by the Trustee in connection with any action taken by it hereunder
and in connection with any action, suit or other proceeding brought against the Trustee involving any claim, or in connection with
any claim or demand, which in any way arises out of or relates to this Agreement, the services of the Trustee hereunder, or the
Property or any interest earned on the Property, except for expenses and losses resulting from the Trustee’s gross negligence,
fraud or willful misconduct. Promptly after the receipt by the Trustee of notice of demand or claim or the commencement of any
action, suit or proceeding, pursuant to which the Trustee intends to seek indemnification under this Section 2(b), the Trustee
shall notify the Company in writing of such claim (hereinafter referred to as the “Indemnified Claim”).
The Trustee shall have the right to conduct and manage the defense against such Indemnified Claim; provided that the Trustee
shall obtain the consent of the Company with respect to the selection of counsel, which consent shall not be unreasonably withheld.
The Trustee shall not agree to settle any Indemnified Claim without the prior written consent of the Company, which such consent
shall not be unreasonably withheld. The Company may participate in such action with its own counsel;


 


(c) Pay
the Trustee the fees set forth on Schedule A hereto, including an initial acceptance fee, annual administration fee, and
transaction processing fee which fees shall be subject to modification by the parties from time to time. It is expressly understood
that the Property shall not be used to pay such fees unless and until a Business Combination (as defined below) is consummated.
The Company shall pay the Trustee the initial acceptance fee and the first annual administration fee at the consummation of the
Offering. The Trustee shall refund to the Company the annual administration fee (on a pro rata basis) with respect to any period
after the liquidation of the Trust Account. The Company shall not be responsible for any other fees or charges of the Trustee except
as set forth in this Section 2(c) and as may be provided in Section 2(b) hereof;


 


(d) In
connection with any vote of the Company’s stockholders regarding a merger, share exchange, asset acquisition, share purchase,
reorganization or similar business combination involving the Company and one or more businesses (a “Business Combination”),
provide to the Trustee an affidavit or certificate of the inspector of elections for the stockholder meeting verifying the vote
of such stockholders regarding such Business Combination;


 


(e) Provide
the Representatives with a copy of any Termination Letter(s) and/or any other correspondence that is sent to the Trustee with respect
to any proposed withdrawal from the Trust Account promptly after it issues the same;


 


(f) Unless
otherwise agreed between the Company and the Representatives, ensure that any Instruction Letter (as defined in Exhibit A)
delivered in connection with a Termination Letter in the form of Exhibit A expressly provides that the Deferred Discount
is paid directly to the account or accounts directed by the Representatives on behalf of the Underwriters prior to any transfer
of the funds held in the Trust Account to the Company or any other person;


 


(g) Instruct
the Trustee to make only those distributions that are permitted under this Agreement, and refrain from instructing the Trustee
to make any distributions that are not permitted under this Agreement;


 


(h) If
the Company seeks to amend any provisions of its amended and restated certificate of incorporation (A) to modify the substance
or timing of the Company’s obligation to provide holders of the Common Stock the right to have their shares redeemed in connection
with the Company’s initial Business Combination or to redeem 100% of the Common Stock if the Company does not complete its
initial Business Combination within the time period set forth therein or (B) with respect to any other provision relating to the
rights of holders of the Common Stock (in each case, an “Amendment”), the Company will provide the Trustee
with a letter (an “Amendment Notification Letter”) in the form of Exhibit D providing
instructions for the distribution of funds to Public Stockholders who exercise their redemption option in connection with such
Amendment; and


 






    3


     


    

 


(i) Within
five (5) business days after the Underwriters exercise their option to purchase additional Units (or any unexercised portion thereof)
or such option to purchase additional Units expires, provide the Trustee with a notice in writing of the total amount of the Deferred
Discount.


 


3. Limitations
of Liability. The Trustee shall have no responsibility or liability to:


 


(a) Imply
obligations, perform duties, inquire or otherwise be subject to the provisions of any agreement or document other than this Agreement
and that which is expressly set forth herein;


 


(b) Take
any action with respect to the Property, other than as directed in Section 1 hereof, and the Trustee shall have no liability
to any third party except for liability arising out of the Trustee’s gross negligence, fraud or willful misconduct;


 


(c) Institute
any proceeding for the collection of any principal and income arising from, or institute, appear in or defend any proceeding of
any kind with respect to, any of the Property unless and until it shall have received instructions from the Company given as provided
herein to do so and the Company shall have advanced or guaranteed to it funds sufficient to pay any expenses incident thereto;


 


(d) Change
the investment of any Property, other than in compliance with Section 1 hereof;


 


(e) Refund
any depreciation in principal of any Property;


 


(f) Assume
that the authority of any person designated by the Company to give instructions hereunder shall not be continuing unless provided
otherwise in such designation, or unless the Company shall have delivered a written revocation of such authority to the Trustee;


 


(g) The
other parties hereto or to anyone else for any action taken or omitted by it, or any action suffered by it to be taken or omitted,
in good faith and in the Trustee’s best judgment, except for the Trustee’s gross negligence, fraud or willful misconduct.
The Trustee may rely conclusively and shall be protected in acting upon any order, notice, demand, certificate, opinion or advice
of counsel (including counsel chosen by the Trustee, which counsel may be the Company’s counsel), statement, instrument,
report or other paper or document (not only as to its due execution and the validity and effectiveness of its provisions, but also
as to the truth and acceptability of any information therein contained) which the Trustee believes, in good faith and with reasonable
care, to be genuine and to be signed or presented by the proper person or persons. The Trustee shall not be bound by any notice
or demand, or any waiver, modification, termination or rescission of this Agreement or any of the terms hereof, unless evidenced
by a written instrument delivered to the Trustee, signed by the proper party or parties and, if the duties or rights of the Trustee
are affected, unless it shall give its prior written consent thereto;


 


(h) Verify
the accuracy of the information contained in the Registration Statement;


 


(i) Provide
any assurance that any Business Combination entered into by the Company or any other action taken by the Company is as contemplated
by the Registration Statement;


 


(j) File
information returns with respect to the Trust Account with any local, state or federal taxing authority or provide periodic written
statements to the Company documenting the taxes payable by the Company, if any, relating to any interest income earned on the Property;


 


(k) Prepare,
execute and file tax reports, income or other tax returns and pay any taxes with respect to any income generated by, and activities
relating to, the Trust Account, regardless of whether such tax is payable by the Trust Account or the Company, including, but not
limited to, income tax obligations, except pursuant to Section 1(j) hereof; or


 






    4


     


    

 


(l) Verify
calculations, qualify or otherwise approve the Company’s written requests for distributions pursuant to Sections 1(i),
1(j) or 1(k) hereof.


 


4. Trust
Account Waiver. The Trustee has no right of set-off or any right, title, interest or claim of any kind (“Claim”)
to, or to any monies in, the Trust Account, and hereby irrevocably waives any Claim to, or to any monies in, the Trust Account
that it may have now or in the future. In the event the Trustee has any Claim against the Company under this Agreement, including,
without limitation, under Section 2(b) or Section 2(c) hereof, the Trustee shall pursue such Claim solely against
the Company and its assets outside the Trust Account and not against the Property or any monies in the Trust Account.


 


5. Termination.
This Agreement shall terminate as follows:


 


(a) If
the Trustee gives written notice to the Company that it desires to resign under this Agreement, the Company shall use its reasonable
efforts to locate a successor trustee, pending which the Trustee shall continue to act in accordance with this Agreement. At such
time that the Company notifies the Trustee that a successor trustee has been appointed by the Company and has agreed to become
subject to the terms of this Agreement, the Trustee shall transfer the management of the Trust Account to the successor trustee,
including but not limited to the transfer of copies of the reports and statements relating to the Trust Account, whereupon this
Agreement shall terminate; provided, however, that in the event that the Company does not locate a successor trustee
within ninety (90) days of receipt of the resignation notice from the Trustee, the Trustee may submit an application to have the
Property deposited with any court in the State of New York or with the United States District Court for the Southern District of
New York and upon such deposit, the Trustee shall be immune from any liability whatsoever; or


 


(b) At
such time that the Trustee has completed the liquidation of the Trust Account and its obligations in accordance with the provisions
of Section 1(i) hereof and distributed the Property in accordance with the provisions of the Termination Letter, this Agreement
shall terminate except with respect to Section 2(b).


 


6. Miscellaneous.


 


(a) The
Company and the Trustee each acknowledge that the Trustee will follow the security procedures set forth below with respect to funds
transferred from the Trust Account. The Company and the Trustee will each restrict access to confidential information relating
to such security procedures to authorized persons. Each party must notify the other party immediately if it has reason to believe
unauthorized persons may have obtained access to such confidential information, or of any change in its authorized personnel. In
executing funds transfers, the Trustee shall rely upon all information supplied to it by the Company, including, account names,
account numbers, and all other identifying information relating to a Beneficiary, Beneficiary’s bank or intermediary bank.
Except for any liability arising out of the Trustee’s gross negligence, fraud or willful misconduct, the Trustee shall not
be liable for any loss, liability or expense resulting from any error in the information or transmission of the funds.


 


(b) This
Agreement shall be governed by and construed and enforced in accordance with 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. This
Agreement may be executed in several original or facsimile counterparts, each one of which shall constitute an original, and together
shall constitute but one instrument.


 


(c) This
Agreement contains the entire agreement and understanding of the parties hereto with respect to the subject matter hereof. Except
for Section 1(i), 1(j) and 1(k) hereof (which sections may not be modified, amended or deleted without the
affirmative vote of a majority of the then outstanding Common Stock and Class B common stock, par value $0.0001 per share, of the
Company, voting together as a single class; provided that no such amendment will affect any Public Stockholder who has properly
elected to redeem his or her Common Stock in connection with a stockholder vote to amend this Agreement to modify the substance
or timing of the Company’s obligation to provide for the redemption of the Common Stock in connection with an initial Business
Combination or an Amendment or to redeem 100% of its Common Stock if the Company does not complete its initial Business Combination
within the time frame specified in the Company’s amended and restated certificate of incorporation), this Agreement or any
provision hereof may only be changed, amended or modified (other than to correct a typographical error) by a writing signed by
each of the parties hereto.


 






    5


     


    

 


(d) The
parties hereto consent to the jurisdiction and venue of any state or federal court located in the City of New York, State of New
York, for purposes of resolving any disputes hereunder. AS TO ANY CLAIM, CROSS-CLAIM OR COUNTERCLAIM IN ANY WAY RELATING TO THIS
AGREEMENT, EACH PARTY WAIVES THE RIGHT TO TRIAL BY JURY.


 


(e) Any
notice, consent or request to be given in connection with any of the terms or provisions of this Agreement shall be in writing
and shall be sent by express mail or similar private courier service, by certified mail (return receipt requested), by hand delivery
or by electronic mail:


 


if to the Trustee, to:


 


Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis E. Wolf, Jr. & Celeste Gonzalez

Email: fwolf@continentalstock.com

cgonzalez@continentalstock.com


 


if to the Company, to:


 


Shelter Acquisition Corporation I

6 Midland Street, #1726

Quogue, New York 11959

Attn: Christopher Keber

E-mail: [●]


 


in each case, with copies to:


 


Kirkland & Ellis LLP

601 Lexington Avenue

New York, New York 10022

Attn: Christian O. Nagler, P.C.

E-mail: cnagler@kirkland.com


 


and


 


Kirkland & Ellis LLP

609 Main Street, Suite 4700

Houston, Texas 77002

Attn: Debbie P. Yee, P.C.

E-mail: debbie.yee@kirkland.com





 


and


 


Citigroup Global Markets Inc.


 


388 Greenwich Street

New York, New York 10013

Attention: General Counsel 


Facsimile
No.: 1-646-291-1469 




 


 






    6


     


    

 


and





 


Wells Fargo Securities,
LLC





500 West 33rd Street





New York, New York 10001 


Attention: Equity Syndicate Department





Facsimile No.: 1-212-214-5918





and


 





Vinson & Elkins L.L.P.

1001 Fannin St., Suite 2500

Houston, Texas 77002

Attn:        E. Ramey Layne





                Scott D. Rubinsky

E-mail:    rlayne@velaw.com





                srubinsky@velaw.com





 


(f) Each
of the Company and the Trustee hereby represents that it has the full right and power and has been duly authorized to enter into
this Agreement and to perform its respective obligations as contemplated hereunder. The Trustee acknowledges and agrees that it
shall not make any claims or proceed against the Trust Account, including by way of set-off, and shall not be entitled to any funds
in the Trust Account under any circumstance.


 


(g) This
Agreement is the joint product of the Trustee 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.


 


(h) This
Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all such counterparts
shall together constitute one and the same instrument. Delivery of a signed counterpart of this Agreement by facsimile or electronic
transmission shall constitute valid and sufficient delivery thereof.


 


(i) Each
of the Company and the Trustee hereby acknowledges and agrees that each of the Representatives on behalf of the Underwriters is
a third-party beneficiary of this Agreement.


 


(j) Except
as specified herein, no party to this Agreement may assign its rights or delegate its obligations hereunder to any other person
or entity.


 


[Signature
Page Follows]


 




    7


     


    


 


IN WITNESS WHEREOF, the parties have
duly executed this Investment Management Trust Agreement as of the date first written above.


 


	 	CONTINENTAL STOCK TRANSFER & TRUST COMPANY, as Trustee
	 	 
	 	By:	 
	 	Name: 	 
	 	Title: 	 
	 	 
	 	SHELTER ACQUISITION CORPORATION I
	 	 
	 	By:	              
	 	Name:  	Christopher Keber
	 	Title: 	Chief Executive Officer 





 


[Signature Page to Investment Management
Trust Agreement]





 




    


     


    


 


SCHEDULE A


 


	Fee Item
 
	 	Time and method of payment
 
	 	Amount
 
	 
	Initial acceptance fee	 	Initial closing of IPO by wire transfer	 	$	3,500.00	 
	Annual fee	 	First year, initial closing of IPO by wire transfer; thereafter on the anniversary of the effective date of the IPO by wire transfer or check	 	$	10,000.00	 
	Transaction processing fee for disbursements to Company under Sections 1(i), 1(j), and 1(k)	 	Billed by Trustee to Company under Section 1	 	$	250.00	 
	Paying Agent services as required pursuant to Section 1(i) and 1(k)	 	Billed to Company upon delivery of service pursuant to Section 1(i) and 1(k)	 	 	Prevailing rates	 




 






    


     


    




 


EXHIBIT A


 


[Letterhead of Company]


 


[Insert date]


 


Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis E. Wolf, Jr. & Celeste Gonzalez


 


		Re:	Trust Account - Termination Letter



 


Ladies and Gentlemen:


 


Pursuant to Section
1(i) of the Investment Management Trust Agreement between Shelter Acquisition Corporation I (the “Company”)
and Continental Stock Transfer & Trust Company (“Trustee”), dated as of [●] , 2021 (the “Trust
Agreement”), this is to advise you that the Company has entered into an agreement with ___________ (the “Target
Business”) to consummate a business combination with Target Business (the “Business Combination”)
on or about [insert date]. The Company shall notify you at least seventy-two (72) hours in advance of the actual date (or
such shorter time period as you may agree) of the consummation of the Business Combination (the “Consummation Date”).
Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement.


 


In accordance with
the terms of the Trust Agreement, we hereby authorize you to commence to liquidate all of the assets of the Trust Account, and
to transfer the proceeds into the trust operating account at J.P. Morgan Chase Bank, N.A. to the effect that, on the Consummation
Date, all of the funds held in the Trust Account will be immediately available for transfer to the account or accounts that the
Representatives (with respect to the Deferred Discount) and the Company shall direct on the Consummation Date. It is acknowledged
and agreed that while the funds are on deposit in said trust operating account at J.P. Morgan Chase Bank, N.A. awaiting distribution,
neither the Company nor the Representatives will earn any interest or dividends.


 


On the Consummation
Date (i) counsel for the Company shall deliver to you written notification that the Business Combination has been consummated,
or will be consummated substantially concurrently with your transfer of funds to the accounts as directed by the Company (the “Notification”),
and (ii) the Company shall deliver to you (a) a certificate of the Chief Executive Officer, Chief Financial Officer or other authorized
officer of the Company, which verifies that the Business Combination has been approved by a vote of the Company’s stockholders,
if a vote is held and (b) joint written instruction signed by the Company and the Representatives with respect to the transfer
of the funds held in the Trust Account, including payment of the Deferred Discount from the Trust Account (the “Instruction
Letter”). You are hereby directed and authorized to transfer the funds held in the Trust Account immediately upon
your receipt of the Notification and the Instruction Letter, in accordance with the terms of the Instruction Letter. In the event
that certain deposits held in the Trust Account may not be liquidated by the Consummation Date without penalty, you will notify
the Company in writing of the same and the Company shall direct you as to whether such funds should remain in the Trust Account
and be distributed after the Consummation Date to the Company. Upon the distribution of all the funds, net of any payments necessary
for reasonable unreimbursed expenses related to liquidating the Trust Account, your obligations under the Trust Agreement shall
be terminated.


 


In the event that the
Business Combination is not consummated on the Consummation Date described in the notice thereof and we have not notified you on
or before the original Consummation Date of a new Consummation Date, then upon receipt by the Trustee of written instructions from
the Company, the funds held in the Trust Account shall be reinvested as provided in Section 1(c) of the Trust Agreement on the
business day immediately following the Consummation Date as set forth in such notice as soon thereafter as possible.


 




    


     


    





 


	 	Very truly yours,
	 	 
	 	Shelter Acquisition Corporation I
	 	 
	 	By:	         
	 	Name:	 
	 	Title:	 





 


	cc:	
        Citigroup Global Markets Inc.

        

        Wells Fargo Securities, LLC

        




 






    


     


    




 


EXHIBIT B


 


[Letterhead of Company]


 


[Insert date]


 


Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis E. Wolf, Jr. & Celeste Gonzalez


 


		Re:	Trust Account - Termination Letter



 


Ladies and Gentlemen:


 


Pursuant to Section
1(i) of the Investment Management Trust Agreement between Shelter Acquisition Corporation I (the “Company”)
and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of [●], 2021 (the
“Trust Agreement”), this is to advise you that the Company has been unable to effect a business combination
with a Target Business (the “Business Combination”) within the time frame specified in the Company’s
amended and restated certificate of incorporation, as described in the Company’s Prospectus relating to the Offering. Capitalized
terms used but not defined herein shall have the meanings set forth in the Trust Agreement.


 


In accordance with
the terms of the Trust Agreement, we hereby authorize you to liquidate all of the assets in the Trust Account on ____________,
20___ and to transfer the total proceeds into the trust operating account at J.P. Morgan Chase Bank, N.A. to await distribution
to the Public Stockholders. The Company has selected __________ as the effective date for the purpose of determining when the Public
Stockholders will be entitled to receive their share of the liquidation proceeds. It is acknowledged that no interest will be earned
by the Company on the liquidation proceeds while on deposit in the trust operating account. You agree to be the Paying Agent of
record and, in your separate capacity as Paying Agent, agree to distribute said funds directly to the Company’s Public Stockholders
in accordance with the terms of the Trust Agreement and the Amended and Restated Certificate of Incorporation of the Company. Upon
the distribution of all the funds, net of any payments necessary for reasonable unreimbursed expenses related to liquidating the
Trust Account, your obligations under the Trust Agreement shall be terminated, except to the extent otherwise provided in Section
1(j) of the Trust Agreement.


 





	 	Very truly yours,
	 	 
	 	Shelter Acquisition Corporation I
	 	 
	 	By:	         
	 	Name:	 
	 	Title:	 








 


	cc:	
        Citigroup Global Markets Inc.

        

        Wells Fargo Securities, LLC

        
	







 






    


     


    




 


EXHIBIT C


 


[Letterhead of Company]


 


[Insert date]


 


Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis E. Wolf, Jr. & Celeste Gonzalez


 


		Re:	Trust Account - Withdrawal Instruction



 


Ladies and Gentlemen:


 


Pursuant to Section
1(j) of the Investment Management Trust Agreement between Shelter Acquisition Corporation I (the “Company”)
and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of [●] , 2021 (the
“Trust Agreement”), the Company hereby requests that you deliver to the Company $___________ of the interest
income earned on the Property as of the date hereof. Capitalized terms used but not defined herein shall have the meanings set
forth in the Trust Agreement.


 


The Company needs such
funds to pay for the tax obligations as set forth on the attached tax return or tax statement. In accordance with the terms of
the Trust Agreement, you are hereby directed and authorized to transfer (via wire transfer) such funds promptly upon your receipt
of this letter to the Company’s operating account at:


 


[WIRE INSTRUCTION INFORMATION]


 


	 	Very truly yours,
	 	 
	 	Shelter Acquisition Corporation I
	 	 
	 	By:	        
	 	Name:	 
	 	Title:	 


 


	cc:	
        Citigroup Global Markets Inc.

        

        Wells Fargo Securities, LLC

        
	


 




    


     


    


 


EXHIBIT D


 


[Letterhead of Company]


 


[Insert date]


 


Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis E. Wolf, Jr. & Celeste Gonzalez


 


		Re:	Trust Account - Stockholder Redemption Withdrawal
Instruction



 


Ladies and Gentlemen:


 


Pursuant to Section
1(k) of the Investment Management Trust Agreement between Shelter Acquisition Corporation I (the “Company”)
and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of [●], 2021 (the
“Trust Agreement”), the Company hereby requests that you deliver to the Company’s stockholders
$___________ of the principal and interest income earned on the Property as of the date hereof. Capitalized terms used but not
defined herein shall have the meanings set forth in the Trust Agreement.


 


Pursuant to Section
1(k) of the Trust Agreement, this is to advise you that the Company has sought an Amendment. Accordingly, in accordance with the
terms of the Trust Agreement, we hereby authorize you to liquidate a sufficient portion of the Trust Account and to transfer $[●]
of the proceeds of the Trust Account to the trust operating account at J.P. Morgan Chase Bank, N.A. for distribution to the stockholders
that have requested redemption of their shares in connection with such Amendment.


 





	 	Very truly yours,
	 	 
	 	Shelter Acquisition Corporation I
	 	 
	 	By:	         
	 	Name:	 
	 	Title:	 





 


	cc:	
        Citigroup Global Markets Inc.

        

        Wells Fargo Securities, LLC