Document:

Exhibit 10.4

 

REGISTRATION RIGHTS AGREEMENT

 

THIS REGISTRATION RIGHTS AGREEMENT (this
 “Agreement”), dated as of [•], 2021, is made and entered into by and among Science Strategic Acquisition
Corp. Alpha, a Delaware corporation (the “Company”), SSAC Alpha Sponsor LLC, a Delaware limited liability company
(the “Sponsor”), and the undersigned parties listed under Holder on the signature page hereto (each such
party, together with the Sponsor and any person or entity who hereafter becomes a party to this Agreement pursuant to Section 5.2
of this Agreement, a “Holder” and collectively the “Holders”).

 

RECITALS

 

WHEREAS, the Company and the Sponsor
have entered into that certain Securities Subscription Agreement (the “Founder Shares Purchase Agreement”),
dated as of October 29, 2020 pursuant to which the Sponsor purchased an aggregate of 6,468,750 shares (the “Founder
Shares”) of the Company’s Class B common stock, par value $0.0001 per share (the “Class B Common
Stock”) (up to 843,750 of which are subject to forfeiture depending on the extent to which the underwriter’s over-allotment
option is exercised);

 

WHEREAS, the Founder Shares are
convertible into shares of the Company’s Class A common stock, par value $0.0001 per share (the “Common Stock”),
on the terms and conditions provided in the Company’s amended and restated certificate of incorporation;

 

WHEREAS, on     ,
2021, the Company and the Sponsor entered into that certain Private Placement Warrants Purchase Agreement (the “Sponsor
Warrants Purchase Agreement”), pursuant to which the Sponsor agreed to purchase an aggregate of [•] warrants (or
up to [•] warrants if the over-allotment option in connection with the Company’s initial public offering is exercised
in full) (the “Private Placement Warrants”), in a private placement transaction occurring simultaneously with
the closing of the Company’s initial public offering, each Private Placement Warrant entitling the holder thereof to purchase
one share of Common Stock at a price of $11.50; and

 

WHEREAS, the Company and the Holders
desire to enter into this Agreement, pursuant to which the Company shall grant the Holders certain registration rights with respect
to certain securities of the Company, as set forth in this Agreement.

 

NOW, THEREFORE, in consideration
of the representations, covenants and agreements contained herein, and certain other good and valuable consideration, the receipt
and sufficiency of which are hereby acknowledged, the parties hereto, intending to be legally bound, hereby agree as follows:

 

ARTICLE I

DEFINITIONS

 

1.1           Definitions.
The terms defined in this Article I shall, for all purposes of this Agreement, have the respective meanings set forth
below:

 

“Adverse Disclosure”
shall mean any public disclosure of material non-public information, which disclosure, in the good faith judgment of the Chief
Executive Officer, the President or the principal financial officer of the Company, after consultation with counsel to the Company,
(i) would be required to be made in any Registration Statement or Prospectus in order for the applicable Registration Statement
or Prospectus not to contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements
contained therein (in the case of any prospectus and any preliminary prospectus, in the light of the circumstances under which
they were made) not misleading, (ii) would not be required to be made at such time if the Registration Statement were not
being filed, and (iii) the Company has a bona fide business purpose for not making such information public.

 

“Agreement” shall have
the meaning given in the Preamble.

 

     

     

    

 

“Board” shall mean the
Board of Directors of the Company.

 

“Business Combination”
shall mean any merger, capital stock exchange, asset acquisition, stock purchase, reorganization or other similar business combination
with one or more businesses, involving the Company.

 

“Business Day” means
any day, other than a Saturday or a Sunday, that is neither a legal holiday nor a day on which banking institutions are generally
authorized or required by law or regulation to close in the City of New York, New York.

 

“Class B Common Stock”
shall have the meaning given in the Recitals hereto.

 

“Commission” shall mean
the Securities and Exchange Commission.

 

“Common Stock” shall
have the meaning given in the Recitals hereto.

 

“Company” shall have
the meaning given in the Preamble.

 

“Demand Registration”
shall have the meaning given in subsection 2.1.1.

 

“Demanding Holder” shall
have the meaning given in subsection 2.1.1.

 

“Exchange Act” shall
mean the Securities Exchange Act of 1934, as it may be amended from time to time.

 

“Form S-1” shall
have the meaning given in subsection 2.1.1.

 

“Form S-3” shall
have the meaning given in subsection 2.3.

 

“Founder Shares” shall
have the meaning given in the Recitals hereto and shall be deemed to include the shares of Common Stock issuable upon conversion
thereof.

 

“Founder Shares Lock-up Period”
shall mean, with respect to the Founder Shares, the period ending on the earlier of (A) one year after the completion of the
Company’s initial Business Combination or (B) subsequent to the Business Combination, (x) if the closing price
of the Common Stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations
and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after the Company’s initial
Business Combination or (y) the date on which the Company completes a liquidation, merger, capital stock exchange, reorganization
or other similar transaction that results in all of the Company’s stockholders having the right to exchange their shares
of Common Stock for cash, securities or other property.

 

“Founder Shares Purchase Agreement”
shall have the meaning given in the Recitals hereto.

 

“Holders” shall have
the meaning given in the Preamble.

 

“Insider Letter” shall
mean that certain letter agreement, dated as of [•], 2021, by and among the Sponsor and each of the Company’s officers,
directors and director nominees.

 

“Maximum Number of Securities”
shall have the meaning given in subsection 2.1.4.

 

“Misstatement” shall
mean an untrue statement of a material fact or an omission to state a material fact required to be stated in a Registration Statement
or Prospectus, or necessary to make the statements contained therein (in the case of any Prospectus, in the light of the circumstances
under which they were made) not misleading.

 

“Permitted Transferees”
shall mean any person or entity to whom a Holder of Registrable Securities is permitted to transfer such Registrable Securities
prior to the expiration of the Founder Shares Lock-up Period or Private Placement Lock-up Period, as the case may be, pursuant
to the Insider Letter and any other applicable agreement between such Holder and the Company, and to any transferee thereafter.

 

     

     

    

 

“Piggyback Registration”
shall have the meaning given in subsection 2.2.1.

 

“Private Placement Lock-up Period”
shall mean, with respect to Private Placement Warrants that are held by the initial purchasers of such Private Placement Warrants
or their Permitted Transferees, the Private Placement Warrants and any shares of Common Stock issued or issuable upon the exercise
or conversion of the Private Placement Warrants and that are held by the initial purchasers of the Private Placement Warrants or
their Permitted Transferees, the period ending 30 days after the completion of the Company’s initial Business Combination.

 

“Private Placement Warrants”
shall have the meaning given in the Recitals hereto.

 

“Prospectus” shall mean
the prospectus included in any Registration Statement, as supplemented by any and all prospectus supplements and as amended by
any and all post-effective amendments and including all material incorporated by reference in such prospectus.

 

“Registrable Security”
shall mean (a) the shares of Common Stock issued or issuable upon the conversion of any Founder Shares, (b) the Private
Placement Warrants (including any shares of the Common Stock issued or issuable upon the exercise of any such Private Placement
Warrants), (c) any outstanding shares of Common Stock or any other equity security (including, without limitation, the shares
of Common Stock issued or issuable upon the exercise of any other equity security, units comprising shares of Common Stock and
warrants, and warrants) of the Company held by a Holder from time to time, (d) any equity securities (including the shares
of the Common Stock issued or issuable upon the exercise of any such equity security) of the Company issuable upon conversion of
any working capital loans in an amount up to $1,500,000 made to the Company by a Holder, and (e) any other equity security
of the Company issued or issuable with respect to any such share of the Common Stock by way of a stock dividend or stock split
or in connection with a combination of shares, recapitalization, merger, consolidation or reorganization; provided, however,
that, as to any particular Registrable Security, such securities shall cease to be Registrable Securities when: (A) a Registration
Statement with respect to the sale of such securities shall have become effective under the Securities Act and such securities
shall have been sold, transferred, disposed of or exchanged in accordance with such Registration Statement; (B) such securities
shall have been otherwise transferred, new certificates for such securities not bearing a legend restricting further transfer shall
have been delivered by the Company and subsequent public distribution of such securities shall not require registration under the
Securities Act; (C) such securities shall have ceased to be outstanding; (D) such securities may be sold without registration
pursuant to Rule 144 promulgated under the Securities Act (or any successor rule promulgated by the Commission) (but
with no volume or other restrictions or limitations); or (E) such securities have been sold to, or through, a broker, dealer
or underwriter in a public distribution or other public securities transaction.

 

“Registration” shall
mean a registration effected by preparing and filing a registration statement or similar document in compliance with the requirements
of the Securities Act, and the applicable rules and regulations promulgated thereunder, and such registration statement becoming
effective.

 

“Registration Expenses”
shall mean the out-of-pocket expenses of a Registration, including, without limitation, the following:

 

(A) all registration and filing fees
(including fees with respect to filings required to be made with the Financial Industry Regulatory Authority, Inc.) and any
securities exchange on which the Common Stock is then listed;

 

(B) fees and expenses of compliance
with securities or blue sky laws (including reasonable fees and disbursements of counsel for the Underwriter(s) in connection
with blue sky qualifications of Registrable Securities);

 

(C) printing, messenger, telephone
and delivery expenses;

 

(D) reasonable fees and disbursements
of counsel for the Company;

 

     

     

    

 

(E) reasonable fees and disbursements
of all independent registered public accountants of the Company incurred specifically in connection with such Registration; and

 

(F) reasonable fees and expenses of
one (1) legal counsel selected by the majority-in-interest of the Demanding Holders initiating a Demand Registration to be
registered for offer and sale in the applicable Registration.

 

“Registration Statement”
shall mean any registration statement that covers the Registrable Securities pursuant to the provisions of this Agreement, including
the Prospectus included in such registration statement, amendments (including post-effective amendments) and supplements to such
registration statement, and all exhibits to and all material incorporated by reference in such registration statement.

 

“Requesting Holder” shall
have the meaning given in subsection 2.1.1.

 

“Securities Act” shall
mean the Securities Act of 1933, as amended from time to time.

 

“Sponsor” shall have
the meaning given in the Preamble hereto.

 

“Sponsor Warrants Purchase Agreement”
shall have the meaning given in the Recitals hereto.

 

“Underwriter” shall mean
a securities dealer who purchases any Registrable Securities as principal in an Underwritten Offering and not as part of such dealer’s
market-making activities.

 

“Underwritten Registration”
or “Underwritten Offering” shall mean a Registration in which securities of the Company are sold to one or more
Underwriters in a firm commitment underwriting for distribution to the public.

 

“Working Capital Warrants”
shall have the meaning given in the Recitals hereto.

 

ARTICLE II

REGISTRATIONS

 

2.1           Demand
Registration.

 

2.1.1            Request
for Registration. Subject to the provisions of subsection 2.1.4 and Section 2.4 hereof, at any time and
from time to time on or after the date the Company consummates the Business Combination, the Holders of at least thirty percent
(30%) in interest of the then-outstanding number of Registrable Securities (the “Demanding Holders”) may make
a written demand for Registration under the Securities Act of all or part of their Registrable Securities, which written demand
shall describe the amount and type of securities to be included in such Registration and the intended method(s) of distribution
thereof (such written demand a “Demand Registration”). The Company shall, within ten (10)  days of the
Company’s receipt of the Demand Registration, notify, in writing, all other Holders of Registrable Securities of such demand,
and each Holder of Registrable Securities who thereafter wishes to include all or a portion of such Holder’s Registrable
Securities in a Registration pursuant to a Demand Registration (each such Holder that includes all or a portion of such Holder’s
Registrable Securities in such Registration, a “Requesting Holder”) shall so notify the Company, in writing,
within five (5) day after the receipt by the Holder of the notice from the Company. Upon receipt by the Company of any such
written notification from a Requesting Holder(s) to the Company, such Requesting Holder(s) shall be entitled to have
their Registrable Securities included in a Registration pursuant to a Demand Registration and the Company shall effect, as soon
thereafter as reasonably practicable, but not more than forty five (45) days immediately after the Company’s receipt
of the Demand Registration, the Registration of all Registrable Securities requested by the Demanding Holders and Requesting Holders
pursuant to such Demand Registration. Under no circumstances shall the Company be obligated to effect more than an aggregate of
three (3) Registrations pursuant to a Demand Registration under this subsection 2.1.1 with respect to any or all Registrable
Securities; provided, however, that a Registration shall not be counted for such purposes unless a Form S-1
or any similar long-form registration statement that may be available at such time (“Form S-1”) has become
effective and all of the Registrable Securities requested by the Requesting Holders to be registered for resale on behalf of the
Requesting Holders in such Form S-1 Registration have been sold, in accordance with Section 3.1 of this Agreement.

 

     

     

    

 

2.1.2            Effective
Registration. Notwithstanding the provisions of subsection 2.1.1 above or any other part of this Agreement, a Registration
pursuant to a Demand Registration shall not count as a Registration unless and until (i) the Registration Statement filed
with the Commission with respect to a Registration pursuant to a Demand Registration has been declared effective by the Commission
and (ii) the Company has complied with all of its obligations under this Agreement with respect thereto; provided,
further, that if, after such Registration Statement has been declared effective, an offering of Registrable Securities in
a Registration pursuant to a Demand Registration is subsequently interfered with by any stop order or injunction of the Commission,
federal or state court or any other governmental agency the Registration Statement with respect to such Registration shall be deemed
not to have been declared effective, unless and until, (i) such stop order or injunction is removed, rescinded or otherwise
terminated, and (ii) a majority-in-interest of the Demanding Holders initiating such Demand Registration thereafter affirmatively
elect to continue with such Registration and accordingly notify the Company in writing, but in no event later than five (5) days,
of such election; provided, further, that the Company shall not be obligated or required to file another Registration
Statement until the Registration Statement that has been previously filed with respect to a Registration pursuant to a Demand Registration
becomes effective or is subsequently terminated.

 

2.1.3            Underwritten
Offering. Subject to the provisions of subsection 2.1.4 and Section 2.4 hereof, if a majority-in-interest
of the Demanding Holders so advise the Company as part of their Demand Registration that the offering of the Registrable Securities
pursuant to such Demand Registration shall be in the form of an Underwritten Offering, then the right of such Demanding Holder
or Requesting Holder (if any) to include its Registrable Securities in such Registration shall be conditioned upon such Holder’s
participation in such Underwritten Offering and the inclusion of such Holder’s Registrable Securities in such Underwritten
Offering to the extent provided herein. All such Holders proposing to distribute their Registrable Securities through an Underwritten
Offering under this subsection 2.1.3 shall enter into an underwriting agreement in customary form with the Underwriter(s) selected
for such Underwritten Offering by the majority-in-interest of the Demanding Holders initiating the Demand Registration.

 

2.1.4            Reduction
of Underwritten Offering. If the managing Underwriter(s) in an Underwritten Registration pursuant to a Demand Registration,
in good faith, advises the Company, the Demanding Holders and the Requesting Holders (if any) in writing that the dollar amount
or number of Registrable Securities that the Demanding Holders and the Requesting Holders (if any) desire to sell, taken together
with all other Common Stock or other equity securities that the Company desires to sell for its own account and the Common Stock,
if any, as to which a Registration has been requested pursuant to separate written contractual piggy-back registration rights held
by any other stockholders who desire to sell, exceeds the maximum dollar amount or maximum number of equity securities that can
be sold in the Underwritten Offering without adversely affecting the proposed offering price, the timing, the distribution method,
or the probability of success of such offering (such maximum dollar amount or maximum number of such securities, as applicable,
the “Maximum Number of Securities”), then the Company shall include in such Underwritten Offering, as follows:
(i) first, the Registrable Securities of the Demanding Holders and the Requesting Holders (if any) (pro rata based on the
respective number of Registrable Securities that each Demanding Holder and Requesting Holder (if any) has requested be included
in such Underwritten Registration and the aggregate number of Registrable Securities that the Demanding Holders and Requesting
Holders have requested be included in such Underwritten Registration (such proportion is referred to herein as “Pro Rata”))
that can be sold without exceeding the Maximum Number of Securities; (ii) second, to the extent that the Maximum Number of
Securities has not been reached under the foregoing clause (i), the Common Stock or other equity securities that the Company desires
to sell for its own account, which can be sold without exceeding the Maximum Number of Securities; and (iii) third, to the
extent that the Maximum Number of Securities has not been reached under the foregoing clauses (i) and (ii), the Common Stock
or other equity securities of other persons or entities that the Company is obligated to register for resale in a Registration
pursuant to separate written contractual arrangements with such persons and that can be sold without exceeding the Maximum Number
of Securities.

 

2.1.5            Demand
Registration Withdrawal. A majority-in-interest of the Demanding Holders initiating a Demand Registration or a majority-in-interest
of the Requesting Holders (if any), pursuant to a Registration under subsection 2.1.1 shall have the right to withdraw from
a Registration pursuant to such Demand Registration for any or no reason whatsoever upon written notification to the Company and
the Underwriter(s) (if any) of their intention to withdraw from such Registration prior to the effectiveness of the Registration
Statement filed with the Commission with respect to the Registration of their Registrable Securities pursuant to such Demand Registration.
Notwithstanding anything to the contrary in this Agreement, (i) the Company may effect any Underwritten Registration pursuant
to any then effective Registration Statement, including a Form S-3, that is then available for such offering and (ii) the
Company shall be responsible for the Registration Expenses incurred in connection with a Registration pursuant to a Demand Registration
prior to its withdrawal under this subsection 2.1.5.

 

     

     

    

 

2.2           Piggyback
Registration.

 

2.2.1            Piggyback
Rights. If, at any time on or after the date the Company consummates a Business Combination, the Company proposes to file a
Registration Statement under the Securities Act with respect to an offering of equity securities, or securities or other obligations
exercisable or exchangeable for, or convertible into equity securities, for its own account or for the account of stockholders
of the Company (or by the Company and by the stockholders of the Company including, without limitation, pursuant to Section 2.1
hereof), other than a Registration Statement (i) filed in connection with any employee stock option or other benefit plan,
(ii) for an exchange offer or offering of securities solely to the Company’s existing stockholders, (iii) for an
offering of debt that is convertible into equity securities of the Company or (iv) for a dividend reinvestment plan, then
the Company shall give written notice of such proposed filing to all of the Holders of Registrable Securities as soon as reasonably
practicable but not less than ten (10) days before the anticipated filing date of such Registration Statement, which notice
shall (A) describe the amount and type of securities to be included in such offering, the intended method(s) of distribution,
and the name of the proposed managing Underwriter(s), if any, in such offering, and (B) offer to all of the Holders of Registrable
Securities the opportunity to register the resale of such number of Registrable Securities as such Holders may request in writing
within five (5) days after receipt of such written notice (such Registration a “Piggyback Registration”).
The Company shall, in good faith, cause such Registrable Securities to be included in such Piggyback Registration and shall use
its best efforts to cause the managing Underwriter(s) of a proposed Underwritten Offering to permit the Registrable Securities
requested by the Holders pursuant to this subsection 2.2.1 to be included in a Piggyback Registration on the same terms
and conditions as any similar securities of the Company included in such Registration and to permit the sale or other disposition
of such Registrable Securities in accordance with the intended method(s) of distribution thereof. All such Holders proposing
to distribute their Registrable Securities through an Underwritten Offering under this subsection 2.2.1 shall enter into
an underwriting agreement in customary form with the Underwriter(s) selected for such Underwritten Offering by the Company.

 

2.2.2            Reduction
of Piggyback Registration. If the managing Underwriter(s) in an Underwritten Registration that is to be a Piggyback Registration,
in good faith, advises the Company and the Holders of Registrable Securities participating in the Piggyback Registration in writing
that the dollar amount or number of the Common Stock that the Company desires to sell, taken together with (i) the Common
Stock, if any, as to which Registration has been demanded pursuant to separate written contractual arrangements with persons or
entities other than the Holders of Registrable Securities hereunder (ii) the Registrable Securities as to which registration
has been requested pursuant Section 2.2 hereof, and (iii) the Common Stock, if any, as to which Registration has
been requested pursuant to separate written contractual piggy-back registration rights of other stockholders of the Company, exceeds
the Maximum Number of Securities, then:

 

    (a) If the Registration is undertaken
for the Company’s account, the Company shall include in any such Registration (A) first, the Common Stock or other equity
securities that the Company desires to sell for its own account, which can be sold without exceeding the Maximum Number of Securities;
(B) second, to the extent that the Maximum Number of Securities has not been reached under the foregoing clause (A), the Registrable
Securities of Holders exercising their rights to register the resale of their Registrable Securities pursuant to subsection
2.2.1 hereof, Pro Rata, which can be sold without exceeding the Maximum Number of Securities; and (C) third, to the extent
that the Maximum Number of Securities has not been reached under the foregoing clauses (A) and (B), the Common Stock, if any,
as to which Registration has been requested pursuant to written contractual piggy-back registration rights of other stockholders
of the Company, which can be sold without exceeding the Maximum Number of Securities;

 

    (b) If the Registration is pursuant
to a request by persons or entities other than the Holders of Registrable Securities, then the Company shall include in any such
Registration (A) first, the Common Stock or other equity securities, if any, of such requesting persons or entities, other
than the Holders of Registrable Securities, which can be sold without exceeding the Maximum Number of Securities; (B) second,
to the extent that the Maximum Number of Securities has not been reached under the foregoing clause (A), the Registrable Securities
of Holders exercising their rights to register the resale of their Registrable Securities pursuant to subsection 2.2.1,
pro rata based on the number of Registrable Securities that each Holder has requested be included in such Underwritten Registration
and the aggregate number of Registrable Securities that the Holders have requested to be included in such Underwritten Registration,
which can be sold without exceeding the Maximum Number of Securities; (C) third, to the extent that the Maximum Number of
Securities has not been reached under the foregoing clauses (A) and (B), the Common Stock or other equity securities that
the Company desires to sell for its own account, which can be sold without exceeding the Maximum Number of Securities; and (D) fourth,
to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (A), (B) and (C), the
Common Stock or other equity securities for the account of other persons or entities that the Company is obligated to register
for resale pursuant to separate written contractual arrangements with such persons or entities, which can be sold without exceeding
the Maximum Number of Securities.

 

     

     

    

 

2.2.3            Piggyback
Registration Withdrawal. Any Holder of Registrable Securities shall have the right to withdraw from a Piggyback Registration
for any or no reason whatsoever upon written notification to the Company and the Underwriter(s) (if any) of his, her or its
intention to withdraw from such Piggyback Registration prior to the effectiveness of the Registration Statement filed with the
Commission with respect to such Piggyback Registration (or in the case of an Underwritten Registration pursuant to Rule 415
under the Securities Act, at least two business days prior to the time of pricing of the applicable offering). The Company (whether
on its own good faith determination or as the result of a request for withdrawal by persons pursuant to separate written contractual
obligations) may withdraw a Registration Statement filed with the Commission in connection with a Piggyback Registration at any
time prior to the effectiveness of such Registration Statement. Notwithstanding anything to the contrary in this Agreement, the
Company shall be responsible for the Registration Expenses incurred in connection with the Piggyback Registration prior to its
withdrawal under this subsection 2.2.3.

 

2.2.4            Unlimited
Piggyback Registration Rights. For purposes of clarity, any Registration effected pursuant to Section 2.2 hereof
shall not be counted as a Registration pursuant to a Demand Registration effected under Section 2.1 hereof.

 

2.3           Registrations
on Form S-3. The Holders of Registrable Securities may at any time, and from time to time, request in writing that the
Company, pursuant to Rule 415 under the Securities Act (or any successor rule promulgated thereafter by the Commission),
register the resale of any or all of their Registrable Securities on Form S-3 or any similar short form registration statement
that may be available at such time (“Form S-3”), or if the Company is ineligible to use Form S-3,
on Form S-1; provided, however, that the Company shall not be obligated to effect such request through an Underwritten
Offering. Within five (5) days of the Company’s receipt of a written request from a Holder or Holders of Registrable
Securities for a Registration on Form S-3, the Company shall promptly give written notice of the proposed Registration on
Form S-3 to all other Holders of Registrable Securities, and each Holder of Registrable Securities who thereafter wishes
to include all or a portion of such Holder’s Registrable Securities in such Registration on Form S-3 shall so notify
the Company, in writing, within ten (10) days after the receipt by the Holder of the notice from the Company. As soon as
reasonably practicable thereafter, but not more than twelve (12) days after the Company’s initial receipt of such written
request for a Registration on Form S-3, the Company shall register the resale of all or such portion of such Holder’s
Registrable Securities as are specified in such written request, together with all or such portion of Registrable Securities of
any other Holder or Holders joining in such request as are specified in the written notification given by such Holder or Holders;
provided, however, that the Company shall not be obligated to effect any such Registration pursuant to Section 2.3
hereof if the Holders of Registrable Securities, together with the Holders of any other equity securities of the Company entitled
to inclusion in such Registration, propose to sell the Registrable Securities and such other equity securities (if any) at any
aggregate price to the public of less than $10,000,000. The Company shall maintain each registration statement pursuant to this
Section 2.3 (a “Shelf”) in accordance with the terms hereof, and shall prepare and file with the
SEC such amendments, including post-effective amendments, and supplements as may be necessary to keep such Shelf continuously
effective, available for use and in compliance with the provisions of the Securities Act until such time as there are no longer
any Registrable Securities included on such Shelf. In the event the Company files a Shelf on Form S-1, the Company shall
use its commercially reasonable efforts to convert the Form S-1 to a Form S-3 as soon as reasonably practicable after
the Company is eligible to use Form S-3. Registrations effected pursuant to this Section 2.3 shall not be counted
as Demand Registrations effected pursuant to Section 2.1.

 

2.4           Restrictions
on Registration Rights. If (A) during the period starting with the date sixty (60) days prior to the Company’s
good faith estimate of the date of the filing of, and ending on a date one hundred and twenty (120) days after the effective
date of, a Company initiated Registration and provided that the Company has delivered written notice to the Holders prior to receipt
of a Demand Registration pursuant to subsection 2.1.1 and it continues to actively employ, in good faith, all reasonable
efforts to cause the applicable Registration Statement to become effective; (B) the Holders have requested an Underwritten
Registration and the Company and the Holders are unable to obtain the commitment of underwriters to firmly underwrite the offer;
or (C) in the good faith judgment of the Board such Registration would be materially detrimental to the Company and the Board
concludes as a result that it is essential to defer the filing of such Registration Statement at such time, then in each case
the Company shall furnish to such Holders a certificate signed by the Chairman of the Board stating that in the good faith judgment
of the Board it would be materially detrimental to the Company for such Registration Statement to be filed in the near future
and that it is therefore essential to defer the filing of such Registration Statement. In such event, the Company shall have the
right to defer such filing for a period of not more than thirty (30) days; provided, however, that the Company
shall not defer its obligation in this manner more than once in any 12-month period. Notwithstanding anything to the contrary
contained in this Agreement, no Registration shall be effected or permitted and no Registration Statement shall become effective,
with respect to any Registrable Securities held by any Holder, until after the expiration of the Founder Shares Lock-Up Period
or the Private Placement Lock-Up Period, as the case may be.

 

     

     

    

 

ARTICLE III

COMPANY PROCEDURES

 

3.1           General
Procedures. If at any time on or after the date the Company consummates a Business Combination the Company is required to
effect the Registration of Registrable Securities, the Company shall use its best efforts to effect such Registration to permit
the sale of such Registrable Securities in accordance with the intended plan of distribution thereof, and pursuant thereto the
Company shall, as expeditiously as possible:

 

3.1.1            prepare
and file with the Commission as soon as reasonably practicable a Registration Statement with respect to such Registrable Securities
and use its reasonable best efforts to cause such Registration Statement to become effective and remain effective until all Registrable
Securities covered by such Registration Statement have been sold;

 

3.1.2            prepare
and file with the Commission such amendments and post-effective amendments to the Registration Statement, and such supplements
to the Prospectus, as may be reasonably requested by the majority in interest of the Holders with Registrable Securities registered
for resale on such Registration Statement or any Underwriter of Registrable Securities or as may be required by the rules, regulations
or instructions applicable to the registration form used by the Company or by the Securities Act or rules and regulations
thereunder to keep the Registration Statement effective until all Registrable Securities covered by such Registration Statement
are sold in accordance with the intended plan of distribution set forth in such Registration Statement or supplement to the Prospectus;

 

3.1.3            prior
to filing a Registration Statement or Prospectus, or any amendment or supplement thereto, furnish without charge to the Underwriter(s),
if any, and the Holders of Registrable Securities included in such Registration, and such Holders’ legal counsel, copies
of such Registration Statement as proposed to be filed, each amendment and supplement to such Registration Statement (in each case
including all exhibits thereto and documents incorporated by reference therein), the Prospectus included in such Registration Statement
(including each preliminary Prospectus), and such other documents as the Underwriter(s) and the Holders of Registrable Securities
included in such Registration or the legal counsel for any such Holders may reasonably request in order to facilitate the disposition
of the Registrable Securities owned by such Holders;

 

3.1.4            prior
to any public offering of Registrable Securities, use its best efforts to (i) register or qualify the Registrable Securities
covered by the Registration Statement under such securities or “blue sky” laws of such jurisdictions in the United
States as the Holders of Registrable Securities included in such Registration Statement (in light of their intended plan of distribution)
may request and (ii) take such action necessary to cause such Registrable Securities covered by the Registration Statement
to be registered with or approved by such other governmental authorities as may be necessary by virtue of the business and operations
of the Company and do any and all other acts and things that may be necessary or advisable to enable the Holders of Registrable
Securities included in such Registration Statement to consummate the disposition of such Registrable Securities in such jurisdictions;
provided, however, that the Company shall not be required to qualify generally to do business in any jurisdiction where it would
not otherwise be required to qualify or take any action to which it would be subject to general service of process or taxation
in any such jurisdiction where it is not then otherwise so subject;

 

     

     

    

 

3.1.5            cause
all such Registrable Securities to be listed on each securities exchange or automated quotation system on which similar securities
issued by the Company are then listed;

 

3.1.6            provide
a transfer agent or warrant agent, as applicable, and registrar for all such Registrable Securities no later than the effective
date of such Registration Statement;

 

3.1.7            advise
each seller of such Registrable Securities, promptly after it shall receive notice or obtain knowledge thereof, of the issuance
of any stop order by the Commission suspending the effectiveness of such Registration Statement or the initiation or threatening
of any proceeding for such purpose and promptly use its reasonable best efforts to prevent the issuance of any stop order or to
obtain its withdrawal if such stop order should be issued;

 

3.1.8            at
least five (5) days prior to the filing of any Registration Statement or Prospectus or any amendment or supplement to such
Registration Statement or Prospectus, furnish a copy thereof to each seller of such Registrable Securities or its counsel;

 

3.1.9            notify
the Holders at any time when a Prospectus relating to such Registration Statement is required to be delivered under the Securities
Act, of the happening of any event as a result of which the Prospectus included in such Registration Statement, as then in effect,
includes a Misstatement, and then to correct such Misstatement as set forth in Section 3.4 hereof;

 

3.1.10          permit
a representative of the Holders, the Underwriter(s), if any, and any attorney or accountant retained by such Holders or Underwriter(s) to
participate, at each such person’s own expense, in the preparation of the Registration Statement, and cause the Company’s
officers, directors and employees to supply all information reasonably requested by any such representative, Underwriter, attorney
or accountant in connection with the Registration; provided, however, that such representatives or Underwriter(s) enter into
a confidentiality agreement, in form and substance reasonably satisfactory to the Company, prior to the release or disclosure of
any such information;

 

3.1.11          obtain
a “cold comfort” letter from the Company’s independent registered public accountants in the event of an Underwritten
Registration, in customary form and covering such matters of the type customarily covered by “cold comfort” letters
as the managing Underwriter(s) may reasonably request, and reasonably satisfactory to a majority-in-interest of the participating
Holders;

 

3.1.12          on
the date the Registrable Securities are delivered for sale pursuant to such Registration, obtain an opinion, dated such date, of
counsel representing the Company for the purposes of such Registration, addressed to the Holders, the placement agent or sales
agent, if any, and the Underwriter(s), if any, covering such legal matters with respect to the Registration in respect of which
such opinion is being given as the participating Holders, placement agent, sales agent, or Underwriter may reasonably request and
as are customarily included in such opinions and negative assurance letters, and reasonably satisfactory to a majority in interest
of the participating Holders;

 

3.1.13          in
the event of any Underwritten Offering, enter into and perform its obligations under an underwriting agreement, in usual and customary
form, with the managing Underwriter(s) of such offering;

 

3.1.14          make
available to its security holders, as soon as reasonably practicable, an earnings statement covering the period of at least twelve
(12) months beginning with the first day of the Company’s first full calendar quarter after the effective date of the
Registration Statement which satisfies the provisions of Section 11(a) of the Securities Act and Rule 158 thereunder
(or any successor rule promulgated thereafter by the Commission);

 

3.1.15          if
the Registration involves the Registration of the resale of the Registrable Securities involving gross proceeds in excess of $25,000,000,
use its reasonable efforts to make available senior executives of the Company to participate in customary “road show”
presentations that may be reasonably requested by the Underwriter(s) in any Underwritten Offering; and

 

3.1.16          otherwise,
in good faith, cooperate reasonably with, and take such customary actions as may reasonably be requested by the participating Holders,
in connection with such Registration.

 

     

     

    

 

3.2           Registration
Expenses. The Registration Expenses of all Registrations shall be borne by the Company. It is acknowledged by the Holders
that the Holders shall bear all incremental selling expenses relating to the sale of Registrable Securities, such as Underwriters’
commissions and discounts, brokerage fees, Underwriter marketing costs and, other than as set forth in the definition of “Registration
Expenses,” all reasonable fees and expenses of any legal counsel representing the Holders.

 

3.3           Requirements
for Participation in Underwritten Offerings. No person may participate in any Underwritten Offering for equity securities
of the Company pursuant to a Registration initiated by the Company hereunder unless such person (i) agrees to sell such person’s
securities on the basis provided in any underwriting arrangements approved by the Company and (ii) completes and executes
all customary questionnaires, powers of attorney, indemnities, lock-up agreements, underwriting agreements and other customary
documents as may be reasonably required under the terms of such underwriting arrangements.

 

3.4           Suspension
of Sales; Adverse Disclosure. Upon receipt of written notice from the Company that a Registration Statement or Prospectus contains
a Misstatement, each of the Holders shall forthwith discontinue disposition of Registrable Securities until it has received copies
of a supplemented or amended Prospectus correcting the Misstatement (it being understood that the Company hereby covenants to prepare
and file such supplement or amendment as soon as reasonably practicable after the time of such notice), or until it is advised
in writing by the Company that the use of the Prospectus may be resumed. If the filing, initial effectiveness or continued use
of a Registration Statement in respect of any Registration at any time would require the Company to make an Adverse Disclosure
or would require the inclusion in such Registration Statement of financial statements that are unavailable to the Company for reasons
beyond the Company’s control, the Company may, upon giving prompt written notice of such action to the Holders, delay the
filing or initial effectiveness of, or suspend use of, such Registration Statement for the shortest period of time, but in no event
more than thirty (30) days, determined in good faith by the Company to be necessary for such purpose. In the event the Company
exercises its rights under the preceding sentence, the Holders agree to suspend, immediately upon their receipt of the notice referred
to above, their use of the Prospectus relating to any Registration in connection with any sale or offer to sell Registrable Securities.
The Company shall immediately notify the Holders of the expiration of any period during which it exercised its rights under this
Section 3.4.

 

3.5           Reporting
Obligations. As long as any Holder shall own Registrable Securities, the Company, at all times while it shall be a reporting
company under the Exchange Act, covenants to file timely (or obtain extensions in respect thereof and file within the applicable
grace period) all reports required to be filed by the Company after the date hereof pursuant to Sections 13(a) or 15(d) of
the Exchange Act and to promptly furnish the Holders with true and complete copies of all such filings. The Company further covenants
that it shall take such further action as any Holder may reasonably request, all to the extent required from time to time to enable
such Holder to sell shares of the Common Stock held by such Holder without registration under the Securities Act within the limitation
of the exemptions provided by Rule 144 promulgated under the Securities Act (or any successor rule promulgated thereafter
by the Commission), including providing any legal opinions. Upon the request of any Holder, the Company shall deliver to such Holder
a written certification of a duly authorized officer as to whether it has complied with such requirements.

 

ARTICLE IV

INDEMNIFICATION AND CONTRIBUTION

 

4.1           Indemnification.

 

4.1.1            The
Company agrees to indemnify, to the extent permitted by law, each Holder of Registrable Securities, its officers, directors, agents
and each person who controls such Holder (within the meaning of the Securities Act) against all losses, claims, damages, liabilities
and out-of-pocket expenses (including, without limitation, reasonable attorneys’ fees) resulting from any untrue or alleged
untrue statement of material fact contained in any Registration Statement, Prospectus or preliminary Prospectus or any amendment
thereof or supplement thereto or any omission or alleged omission of a material fact required to be stated therein or necessary
to make the statements therein not misleading, except insofar as the same are caused by or contained in any information furnished
in writing to the Company by such Holder expressly for use therein. The Company shall indemnify the Underwriter(s), their officers
and directors and each person who controls such Underwriter(s) (within the meaning of the Securities Act) to the same extent
as provided in the foregoing with respect to the indemnification of the Holder.

 

     

     

    

 

4.1.2            In
connection with any Registration Statement in which a Holder of Registrable Securities is participating, such Holder shall furnish
to the Company in writing such information and affidavits as the Company reasonably requests for use in connection with any such
Registration Statement or Prospectus and, to the extent permitted by law, shall indemnify the Company, its directors and officers
and agents and each person who controls the Company (within the meaning of the Securities Act) against any losses, claims, damages,
liabilities and out-of-pocket expenses (including, without limitation, reasonable attorneys’ fees) resulting from any untrue
statement of material fact contained in the Registration Statement, Prospectus or preliminary Prospectus or any amendment thereof
or supplement thereto or any omission of a material fact required to be stated therein or necessary to make the statements therein
not misleading, but only to the extent that such untrue statement or omission is contained in any information or affidavit so furnished
in writing by such Holder expressly for use therein; provided, however, that the obligation to indemnify shall be
several, not joint and several, among such Holders of Registrable Securities, and the liability of each such Holder of Registrable
Securities shall be in proportion to and limited to the net proceeds received by such Holder from the sale of Registrable Securities
pursuant to such Registration Statement. The Holders of Registrable Securities shall indemnify the Underwriter(s), their officers,
directors and each person who controls such Underwriter(s) (within the meaning of the Securities Act) to the same extent as
provided in the foregoing with respect to indemnification of the Company.

 

4.1.3            Any
person entitled to indemnification herein shall (i) give prompt written notice to the indemnifying party of any claim with
respect to which it seeks indemnification (provided that the failure to give prompt notice shall not impair any person’s
right to indemnification hereunder to the extent such failure has not materially prejudiced the indemnifying party) and (ii) unless
in such indemnified party’s reasonable judgment a conflict of interest between such indemnified and indemnifying parties
may exist with respect to such claim, permit such indemnifying party to assume the defense of such claim with counsel reasonably
satisfactory to the indemnified party. If such defense is assumed, the indemnifying party shall not be subject to any liability
for any settlement made by the indemnified party without its consent (but such consent shall not be unreasonably withheld). An
indemnifying party who is not entitled to, or elects not to, assume the defense of a claim shall not be obligated to pay the fees
and expenses of more than one counsel for all parties indemnified by such indemnifying party with respect to such claim, unless
in the reasonable judgment of any indemnified party a conflict of interest may exist between such indemnified party and any other
of such indemnified parties with respect to such claim. No indemnifying party shall, without the consent of the indemnified party,
consent to the entry of any judgment or enter into any settlement which cannot be settled in all respects by the payment of money
(and such money is so paid by the indemnifying party pursuant to the terms of such settlement) or which settlement does not include
as an unconditional term thereof the giving by the claimant or plaintiff to such indemnified party of a release from all liability
in respect to such claim or litigation.

 

4.1.4            The
indemnification provided for under this Agreement shall remain in full force and effect regardless of any investigation made by
or on behalf of the indemnified party or any officer, director or controlling person of such indemnified party and shall survive
the transfer of securities. The Company and each Holder of Registrable Securities participating in an offering also agrees to make
such provisions as are reasonably requested by any indemnified party for contribution to such party in the event the Company’s
or such Holder’s indemnification is unavailable for any reason.

 

4.1.5            If
the indemnification provided under Section 4.1 hereof from the indemnifying party is unavailable or insufficient to
hold harmless an indemnified party in respect of any losses, claims, damages, liabilities and expenses referred to herein, then
the indemnifying party, in lieu of indemnifying the indemnified party, shall contribute to the amount paid or payable by the indemnified
party as a result of such losses, claims, damages, liabilities and expenses in such proportion as is appropriate to reflect the
relative fault of the indemnifying party and the indemnified party, as well as any other relevant equitable considerations. The
relative fault of the indemnifying party and indemnified party shall be determined by reference to, among other things, whether
any action in question, including any untrue or alleged untrue statement of a material fact or omission or alleged omission to
state a material fact, was made by, or relates to information supplied by, such indemnifying party or indemnified party, and the
indemnifying party’s and indemnified party’s relative intent, knowledge, access to information and opportunity to correct
or prevent such action; provided, however, that the liability of any Holder under this subsection 4.1.5 shall
be limited to the amount of the net proceeds received by such Holder in such offering giving rise to such liability. The amount
paid or payable by a party as a result of the losses or other liabilities referred to above shall be deemed to include, subject
to the limitations set forth in subsections 4.1.1, 4.1.2, and 4.1.3 above, any legal or other fees, charges
or expenses reasonably incurred by such party in connection with any investigation or proceeding. The parties hereto agree that
it would not be just and equitable if contribution pursuant to this subsection 4.1.5 were determined by pro rata allocation
or by any other method of allocation, which does not take account of the equitable considerations referred to in this subsection
4.1.5. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities
Act) shall be entitled to contribution pursuant to this subsection 4.1.5 from any person who was not guilty of such fraudulent
misrepresentation.

 

     

     

    

 

ARTICLE V

MISCELLANEOUS

 

5.1           Notices.
Any notice or communication under this Agreement must be in writing and given by (i) deposit in the United States mail, addressed
to the party to be notified, postage prepaid and registered or certified with return receipt requested, (ii) delivery in person
or by courier service providing evidence of delivery, or (iii) transmission by hand delivery, electronic mail, telecopy, telegram
or facsimile. Each notice or communication that is mailed, delivered, or transmitted in the manner described above shall be deemed
sufficiently given, served, sent, and received, in the case of mailed notices, on the third Business Day following the date on
which it is mailed and, in the case of notices delivered by courier service, hand delivery, electronic mail, telecopy, telegram
or facsimile, at such time as it is delivered to the addressee (with the delivery receipt or the affidavit of messenger) or at
such time as delivery is refused by the addressee upon presentation. Any notice or communication under this Agreement must be addressed,
if to the Company, to: Science Strategic Acquisition Corp. Alpha, 147 2nd Street, Santa Monica, CA 90401, Attention:
[●], and, if to any Holder, at such Holder’s address or facsimile number as set forth in the Company’s books
and records. Any party may change its address for notice at any time and from time to time by written notice to the other parties
hereto, and such change of address shall become effective thirty (30) calendar days after delivery of such notice as provided
in this Section 5.1.

 

5.2           Assignment;
No Third Party Beneficiaries.

 

5.2.1            This
Agreement and the rights, duties and obligations of the Company hereunder may not be assigned or delegated by the Company in whole
or in part.

 

5.2.2            Prior
to the expiration of the Founder Shares Lock-up Period or the Private Placement Lock-up Period, as the case may be, no Holder may
assign or delegate such Holder’s rights, duties or obligations under this Agreement, in whole or in part, except in connection
with a transfer of Registrable Securities by such Holder to a Permitted Transferee.

 

5.2.3            This
Agreement and the provisions hereof shall be binding upon and shall inure to the benefit of each of the parties and its successors
and the permitted assigns of the Holders, which shall include Permitted Transferees.

 

5.2.4            This
Agreement shall not confer any rights or benefits on any persons that are not parties hereto, other than as expressly set forth
in this Agreement and Section 5.2 hereof.

 

5.2.5            No
assignment by any party hereto of such party’s rights, duties and obligations hereunder shall be binding upon or obligate
the Company unless and until the Company shall have received (i) written notice of such assignment as provided in Section 5.1
hereof and (ii) the written agreement of the assignee, in a form reasonably satisfactory to the Company, to be bound by
the terms and provisions of this Agreement (which may be accomplished by an addendum or certificate of joinder to this Agreement).
Any transfer or assignment made other than as provided in this Section 5.2 shall be null and void.

 

5.3            Counterparts.
This Agreement may be executed in multiple counterparts (including facsimile or PDF counterparts), each of which shall be deemed
an original, and all of which together shall constitute the same instrument, but only one of which need be produced.

 

     

     

    

 

5.4           Governing
Law; Venue. NOTWITHSTANDING THE PLACE WHERE THIS AGREEMENT MAY BE EXECUTED BY ANY OF THE PARTIES HERETO, THE PARTIES
EXPRESSLY AGREE THAT THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED UNDER THE LAWS OF THE STATE OF NEW YORK AS APPLIED TO AGREEMENTS
AMONG NEW YORK RESIDENTS ENTERED INTO AND TO BE PERFORMED ENTIRELY WITHIN NEW YORK, WITHOUT REGARD TO THE CONFLICT OF LAW PROVISIONS
OF SUCH JURISDICTION.

 

5.5           Amendments
and Modifications. Upon the written consent of the Company and the Holders of at least a majority in interest of the Registrable
Securities at the time in question, compliance with any of the provisions, covenants and conditions set forth in this Agreement
may be waived, or any of such provisions, covenants or conditions may be amended or modified; provided, however,
that notwithstanding the foregoing, any amendment hereto or waiver hereof that adversely affects one Holder, solely in its capacity
as a holder of the shares of capital stock of the Company, in a manner that is materially different from the other Holders (in
such capacity) shall require the consent of the Holder so affected. No course of dealing between any Holder or the Company and
any other party hereto or any failure or delay on the part of a Holder or the Company in exercising any rights or remedies under
this Agreement shall operate as a waiver of any rights or remedies of any Holder or the Company. No single or partial exercise
of any rights or remedies under this Agreement by a party shall operate as a waiver or preclude the exercise of any other rights
or remedies hereunder or thereunder by such party.

 

5.6           Other
Registration Rights. The Company represents and warrants that no person, other than a Holder of Registrable Securities, has
any right to require the Company to register the offer, sale or resale of any securities of the Company for sale or to include
such securities of the Company in any Registration filed by the Company for the sale of securities for its own account or for
the account of any other person. Further, the Company represents and warrants that this Agreement supersedes any other registration
rights agreement or agreement with similar terms and conditions and in the event of a conflict between any such agreement or agreements
and this Agreement, the terms of this Agreement shall prevail.

 

5.7           Term.
This Agreement shall terminate with respect to any Holder on the date that such Holder no longer holds any Registrable Securities.
The provisions of Section 3.5 and Article IV shall survive any termination.

 

[SIGNATURE PAGES FOLLOW]

 

     

     

    

 

IN WITNESS WHEREOF, the undersigned have caused this
Agreement to be executed as of the date first written above.

 

	 	COMPANY:
	 	 
	 	SCIENCE STRATEGIC ACQUISITION CORP. ALPHA,
	 	a Delaware corporation
	 	 
	 	By:	 
	 	 	Name:
	 	 	Title:
	 	 
	 	HOLDERS:
	 	 
	 	SSAC ALPHA SPONSOR LLC,
	 	a Delaware limited liability company
	 	 
	 	By:	 
	 	 	Name:
	 	 	Title:

 

[Signature Page to Registration Rights
Agreement]Exhibit 10.5

Science Strategic Acquisition Corp. Alpha

1447 2nd Street

Santa Monica, CA 90401

 

October 29, 2020

 

SSAC Alpha Sponsor, LLC

1447 2nd Street

Santa Monica, CA 90401

 

RE:          Securities
Subscription Agreement

 

Ladies and Gentlemen:

 

Science Strategic Acquisition Corp. Alpha,
a Delaware corporation (the “Company”), is pleased to accept the offer SSAC Alpha Sponsor, LLC, a Delaware limited
liability company (the “Subscriber” or “you”), has made to purchase 6,468,750 of the Company’s
Class B common stock (the “Shares”), $0.0001 par value per share (the “Class B Common Stock”),
up to 843,750 Shares of which are subject to complete or partial forfeiture by you if the underwriters of the initial public offering
(“IPO”) of the Company, do not fully exercise their over-allotment option (the “Over-allotment Option”).
For the purposes of this Agreement, references to “Common Stock,” are to, collectively, the Class B Common
Stock and the Company’s Class A common stock, $0.0001 par value per share (the “Class A Common Stock”).
Pursuant to the Company’s certificate of incorporation, as amended to the date hereof (the “Charter”),
shares of Class B Common Stock will convert into shares of Class A Common Stock on a one-for-one basis, subject to adjustment,
upon the terms and conditions set forth in the Charter. Unless the context otherwise requires, as used herein “Securities”
shall refer to the Shares and shall be deemed to include any shares of Class A Common Stock issued upon conversion of the
Shares. The terms (this “Agreement”) on which the Company is willing to sell the Shares to the Subscriber, and
the Company and the Subscriber’s agreements regarding such Shares, are as follows:

 

1.            Purchase
of Shares. For the sum of $25,000 (the “Purchase Price”), which the Company acknowledges receiving in cash,
the Company hereby sells and issues the Shares to the Subscriber, and the Subscriber hereby purchases the Shares from the Company,
subject to the forfeiture provisions of Section 3 below, 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 Securities 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 Securities.

 

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 (i) the formation and governing documents
of the Subscriber, (ii) any agreement, indenture or instrument to which the Subscriber is a party, (iii) any law, statute,
rule or regulation to which the Subscriber is subject, or (iv) 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 will be 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. Subscriber is: (i) sophisticated in financial matters and is able to evaluate the
risks and benefits of the investment in the Securities and (ii) able to bear the economic risk of its investment in the Securities
for an indefinite period of time because the Securities have not been registered under the Securities Act (as defined below) 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. Subscriber must bear the economic risk of this investment until the Securities 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 Securities and to afford a complete loss of Subscriber’s
investment in the Securities.

 

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 

     

    

 

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 under the Securities Act of 1933, as amended (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 under the Securities Act or similar exemptions under applicable state law.

 

2.1.7            Investment
Purposes. The Subscriber is subscribing for and purchasing the Securities 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. Neither the Subscriber nor any of its officers, managers, employees, agents or members has either directly or indirectly,
including through a broker or finder (i) to its knowledge, engaged in any general solicitation, or (ii) published any
general advertisement in connection with the offer and sale of the Securities.

 

2.1.8            Restrictions
on Transfer; Shell Company. Subscriber understands the Securities are being offered in a transaction not involving a public
offering within the meaning of the Securities Act. Subscriber understands the Securities will be “restricted securities”
within the meaning of Rule 144(a)(3) under the Securities Act and Subscriber understands that the certificates or book-entries
representing the Securities will contain a legend in respect of such restrictions. If in the future the Subscriber decides to offer,
resell, pledge or otherwise transfer the Securities, such Securities may be offered, resold, pledged or otherwise transferred only
pursuant to: (i) registration under the Securities Act, or (ii) an available exemption from registration. Subscriber
agrees that if any transfer of its Securities 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 offer, resell, pledge or otherwise transfer the Securities. Subscriber further acknowledges
that because the Company is a shell company, Rule 144 may not be available to the Subscriber for the resale of the Securities
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            Company’s
Representations, Warranties and Agreements. To induce the Subscriber to purchase the Securities, 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.

 

    3 

     

    

 

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 (i) the Charter or bylaws of the Company,
(ii) any agreement, indenture or instrument to which the Company is a party, (iii) any law, statute, rule or regulation
to which the Company is subject, or (iv) 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 and the Charter, the Securities
will be duly and validly issued, fully paid and nonassessable. Upon issuance in accordance with, and payment pursuant to, the terms
hereof and the Charter, the Subscriber will have or receive good title to the Securities, free and clear of all liens, claims and
encumbrances of any kind, other than (a) transfer restrictions hereunder and under the other agreements to which the Securities
may be subject, (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
General Solicitation. Neither the Company, nor any of its officers, directors, employees, agents or stockholders has either
directly or indirectly, including, through a broker or finder (i) engaged in any general solicitation, or (ii) published
any general advertisement in connection with the offer and sale of the Securities.

 

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

 

2.2.6            Authorization.
The shares of Class A Common Stock issuable upon conversion of the Shares have been duly authorized and reserved for issuance
upon such conversion.

 

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 Shares)
shall forfeit any and all rights to such number of Shares (up to an aggregate of 843,750 Shares and pro rata based upon the percentage
of the Over-allotment Option exercised) such that immediately following such forfeiture, the Subscriber (and any such transferees)
will own an aggregate number of Shares (not including Shares issuable upon exercise of any warrants or any Common Stock purchased
by the Subscriber in the IPO or in the aftermarket) equal to 20% of the issued and outstanding Common Stock immediately following
the IPO.

 

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 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.

 

    4 

     

    

 

3.3            Share
Certificates. In the event an adjustment to 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 from the Company advising Subscriber of such adjustment, following which a new certificate (the “New
Certificate”), if any, shall be issued in such amount representing the adjusted number of Shares held by the Subscriber.
The New Certificate 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 securities in the IPO or in the aftermarket, any Class A 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 of Common Stock held by it 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”) to be dated on or prior to the closing date of the IPO by and between Subscriber and the Company, Subscriber
agrees not to sell, transfer, pledge, hypothecate or otherwise dispose of all or any part of the Securities unless, prior thereto
(a) a registration statement on the appropriate form under the Securities Act and applicable state securities laws with respect
to the Securities 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
under the Securities Act and the rules promulgated by the Securities and Exchange Commission thereunder and with all applicable
state securities laws.

 

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

 

5.3            Restrictive
Legends. All certificates representing the Securities shall have endorsed thereon legends substantially as follows:

 

“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
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.”

 

    5 

     

    

 

“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 stock dividend, the declaration of a special dividend
payable in a form other than Common Stock, a spin-off, a stock split, an adjustment in conversion ratio, a recapitalization or
a similar transaction affecting the Company’s outstanding 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 Securities subject
to this Section 5 or into which such Securities 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 Securities subject to this Section 5 and Section 3.

 

5.5            Registration
Rights. The 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 they are registered pursuant to
a registration rights agreement to be entered into with the Company in connection with the closing of the IPO (the “Registration
Rights Agreement”).

 

6.            Other
Agreements.

 

6.1            Further
Assurances. The 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, statements or other documents which are required or contemplated by this Agreement shall be in writing and delivered:
(i) personally or sent by first class registered or certified mail, overnight courier service or facsimile or electronic transmission
to the address designated in writing, (ii) by facsimile to the number most recently provided to such party or such other address
or fax number as may be designated in writing by such party and (iii) by electronic mail, to the electronic mail address most
recently provided to such party or such other electronic mail address as may be designated in writing by such party. Any notice
or other communication so transmitted shall be deemed to have been given on the day of delivery, if delivered personally, on the
business day following receipt of written confirmation, if sent by facsimile or electronic transmission, one (1) business
day after delivery to an overnight courier service or five (5) days after mailing if sent by mail.

 

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, 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.

 

    6 

     

    

 

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            Waivers
and Consents. The terms and provisions of this Agreement may be waived, or consent for the departure therefrom granted, only
by written document executed by the party entitled to the benefits of such terms or provisions. No such waiver or consent shall
be deemed to be or shall constitute a waiver or consent with respect to any other terms or provisions of this Agreement, whether
or not similar. Each such waiver or consent shall be effective only in the specific instance and for the purpose for which it was
given, and shall not constitute a continuing waiver or consent.

 

6.6            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.

 

6.7            Benefit.
All statements, representations, warranties, covenants and agreements in this Agreement shall be binding on the parties hereto
and shall inure to the benefit of the respective successors and permitted assigns of each party hereto. Nothing in this Agreement
shall be construed to create any rights or obligations except among the parties hereto, and no person or entity shall be regarded
as a third-party beneficiary of this Agreement.

 

6.8            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.

 

6.9            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.

 

6.10            No
Waiver of Rights, Powers and Remedies. No failure or delay by a party hereto in exercising any right, power or remedy under
this Agreement, and no course of dealing between the parties hereto, shall operate as a waiver of any such right, power or remedy
of such party. No single or partial exercise of any right, power or remedy under this Agreement by a party hereto, nor any abandonment
or discontinuance of steps to enforce any such right, power or remedy, shall preclude such party from any other or further exercise
thereof or the exercise of any other right, power or remedy hereunder. The election of any remedy by a party hereto shall not constitute
a waiver of the right of such party to pursue other available remedies. No notice to or demand on a party not expressly required
under this Agreement shall entitle the party receiving such notice or demand to any other or further notice or demand in similar
or other circumstances or constitute a waiver of the rights of the party giving such notice or demand to any other or further action
in any circumstances without such notice or demand.

 

    7 

     

    

 

6.11            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.

 

6.12            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 hold 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.

 

6.13            Headings
and Captions. The headings and captions of the various sections 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.

 

6.14            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.

 

6.15            Construction.
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.

 

6.16            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 shall not seek redemption with respect to any of the
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 

     

    

 

8.            Indemnification.
Each party shall indemnify (such party, the “Indemnifying Party”) the other party (such party, the “Indemnified
Party”) and its respective officers, employees, and controlling persons to the fullest extent permitted by law from and
against any and all losses, damages, expenses (including reasonable attorneys’ fees and expenses) or other liabilities resulting
from or arising out of such party’s breach of any representation, warranty, covenant or agreement in this Agreement. The
foregoing indemnification rights apply so long as the action or failure to act by the Indemnified Party does not constitute fraud,
bad faith, willful misconduct or gross negligence. Notwithstanding any of the foregoing to the contrary, indemnification protections
will not be construed so as to relieve (or attempt to relieve) any Indemnified Party of any liability (including liability under
federal securities laws which, under certain circumstances, impose liability even on persons that act in good faith), to the extent
(but only to the extent) that such liability may not be waived, modified or limited under applicable law, but will only be construed
so as to effectuate the indemnification protections to the fullest extent permitted by law.

 

[Signature Page Follows]

 

    9 

     

    

 

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,
	 	 
	 	SCIENCE STRATEGIC ACQUISITION CORP. ALPHA
	 	 
	 	By:	/s/ Thomas Dare
	 	Name:	Thomas Dare
	 	Title:	Chief Financial Officer

 

	Accepted and agreed this 29th day of October, 2020	 
	 	 
	SSAC ALPHA SPONSOR, LLC	 
	 	 
	By:	/s/ Greg Gilman	 
	Name:	Greg Gilman	 
	Title:	Secretary	 

 

[Signature Page to Subscription Agreement]

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