Document:

Exhibit 10.2.1

 

Option No.________

 

SERA PROGNOSTICS, INC.

 

Stock Option Grant Notice

Stock Option Grant under the Company’s

2011 Employee, Director and Consultant Equity Incentive
Plan

 

	1.	Name
and Address of Participant:	 
	 	 	 
	 	 	 
	 	 	 
	2.	Date
of Option Grant:	 
	 	 	 
	3.	Type of Grant:	 
	 	 	 
	4.	Maximum
Number of Shares for which this Option is exercisable:	 
	 	 	 
	5.	Exercise
(purchase) price per share:	 
	 	 	 
	6.	Option Expiration
Date:	 
	 	 	 
	7.	Vesting Start
Date1:	 

 

	8.	Vesting Schedule: This Option shall become exercisable (and the Shares issued upon exercise shall be vested)
as follows provided the Participant is an Employee, director or Consultant of the Company or of an Affiliate on the applicable vesting
date:

 

[Insert Vesting Schedule - sample below]

 

	[On the first anniversary of the Vesting Start Date	 	up
to ____________ Shares2

 

 

1 This date is only necessary if a company has decided to trigger vesting from a date that is different
from the date of option grant such as a hire date and is to be used a point of reference for future vesting only.

2 If the agreement does not set forth a vesting schedule as to a specific number of shares and a % is
used instead consider adding the following to the end of the vesting schedule to address the potential vesting of fractional shares:

“provided that the number of shares vesting on each date shall be rounded down to the nearest whole number, whilst the number of
shares vesting on the final date shall be the remaining unvested balance of the Shares.”

 

     

     

    

 

	On the second anniversary of the Vesting Start Date	 	an additional __________ Shares
	 	 	 
	On
the third anniversary of the Vesting Start Date		an additional __________ Shares]

 

The foregoing rights are cumulative
and are subject to the other terms and conditions of this Agreement and the Plan.

 

The Company and the Participant
acknowledge receipt of this Stock Option Grant Notice and agree to the terms of the Stock Option Agreement attached hereto and incorporated
by reference herein, the Company’s 2011 Employee, Director and Consultant Equity Incentive Plan and the terms of this Option Grant
as set forth above.

 

	 	SERA PROGNOSTICS, INC.

 

		By:	 

		Name:	 

		Title:	 

 

 

	 	 
	 	Participant

 

    2 

     

    

 

SERA PROGNOSTICS, INC.

 

STOCK OPTION AGREEMENT - INCORPORATED TERMS
AND CONDITIONS

 

AGREEMENT made as of the date
of grant set forth in the Stock Option Grant Notice by and between Sera Prognostics, Inc. (the “Company”), a Delaware
corporation, and the individual whose name appears on the Stock Option Grant Notice (the “Participant”).

 

WHEREAS, the Company desires
to grant to the Participant an Option to purchase shares of its common stock, $0.0001 par value per share (the “Shares”),
under and for the purposes set forth in the Company’s 2011 Employee, Director and Consultant Equity Incentive Plan (the “Plan”);

 

WHEREAS, the Company and the
Participant understand and agree that any terms used and not defined herein have the same meanings as in the Plan; and

 

WHEREAS, the Company and the
Participant each intend that the Option granted herein shall be of the type set forth in the Stock Option Grant Notice.

 

NOW, THEREFORE, in consideration
of the mutual covenants hereinafter set forth and for other good and valuable consideration, the parties hereto agree as follows:

 

1.             GRANT
OF OPTION.

 

The Company hereby grants to
the Participant the right and option to purchase all or any part of an aggregate of the number of Shares set forth in the Stock Option
Grant Notice, on the terms and conditions and subject to all the limitations set forth herein, under United States securities and tax
laws, and in the Plan, which is incorporated herein by reference. The Participant acknowledges receipt of a copy of the Plan.

 

2.             EXERCISE
PRICE.

 

The exercise price of the Shares
covered by the Option shall be the amount per Share set forth in the Stock Option Grant Notice, subject to adjustment, as provided in
the Plan, in the event of a stock split, reverse stock split or other events affecting the holders of Shares after the date hereof (the
 “Exercise Price”). Payment shall be made in accordance with Paragraph 9 of the Plan.

 

3.             EXERCISABILITY
OF OPTION.

 

Subject to the terms and conditions
set forth in this Agreement and the Plan, the Option granted hereby shall become vested and exercisable as set forth in the Stock Option
Grant Notice and is subject to the other terms and conditions of this Agreement and the Plan.

 

     

     

    

 

4.             TERM
OF OPTION.

 

This Option shall terminate
on the Option Expiration Date as specified in the Stock Option Grant Notice and, if this Option is designated in the Stock Option Grant
Notice as an ISO and the Participant owns as of the date hereof more than 10% of the total combined voting power of all classes of capital
stock of the Company or an Affiliate, such date may not be more than five years from the date of this Agreement, but shall be subject
to earlier termination as provided herein or in the Plan.

 

If the Participant ceases to
be an Employee, director or Consultant of the Company or of an Affiliate for any reason other than the death or Disability of the Participant,
or termination of the Participant for Cause (the “Termination Date”), the Option to the extent then vested and exercisable
pursuant to Section 3 hereof as of the Termination Date, and not previously terminated in accordance with this Agreement, may be
exercised within three months after the Termination Date, or on or prior to the Option Expiration Date as specified in the Stock Option
Grant Notice, whichever is earlier, but may not be exercised thereafter except as set forth below. In such event, the unvested portion
of the Option shall not be exercisable and shall expire and be cancelled on the Termination Date.

 

If
this Option is designated in the Stock Option Grant Notice as an ISO and the Participant ceases to be an Employee of the Company
or of an Affiliate but continues after termination of employment to provide service to the Company or an Affiliate as a director or Consultant,
this Option shall continue to vest in accordance with Section 3 above as if this Option had not terminated until the Participant
is no longer providing services to the Company. In such case, this Option shall automatically convert and be deemed a Non-Qualified Option
as of the date that is three months from termination of the Participant's employment and this Option shall continue on the same terms
and conditions set forth herein until such Participant is no longer providing service to the Company or an Affiliate.

 

Notwithstanding the foregoing,
in the event of the Participant’s Disability or death within three months after the Termination Date, the Participant or the Participant’s
Survivors may exercise the Option within one year after the Termination Date, but in no event after the Option Expiration Date as specified
in the Stock Option Grant Notice.

 

In the event the Participant’s
service is terminated by the Company or an Affiliate for Cause, the Participant’s right to exercise any unexercised portion of this
Option even if vested shall cease immediately as of the time the Participant is notified his or her service is terminated for Cause, and
this Option shall thereupon terminate. Notwithstanding anything herein to the contrary, if subsequent to the Participant’s termination,
but prior to the exercise of the Option, the Administrator determines that, either prior or subsequent to the Participant’s termination,
the Participant engaged in conduct which would constitute Cause, then the Participant shall immediately cease to have any right to exercise
the Option and this Option shall thereupon terminate.

 

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In the event of the Disability
of the Participant, as determined in accordance with the Plan, the Option shall be exercisable within one year after the Participant’s
termination of service due to Disability or, if earlier, on or prior to the Option Expiration Date as specified in the Stock Option Grant
Notice. In such event, the Option shall be exercisable:

 

		(a)	to the extent that the Option has become exercisable but has not been exercised as of the date of the
Participant’s termination of service due to Disability; and

 

		(b)	in the event rights to exercise the Option accrue periodically, to the extent of a pro rata portion through
the date of the Participant’s termination of service due to Disability of any additional vesting rights that would have accrued
on the next vesting date had the Participant not become Disabled. The proration shall be based upon the number of days accrued in the
current vesting period prior to the date of the Participant’s termination of service due to Disability.

 

In the event of the death of
the Participant while an Employee, director or Consultant of the Company or of an Affiliate, the Option shall be exercisable by the Participant’s
Survivors within one year after the date of death of the Participant or, if earlier, on or prior to the Option Expiration Date as specified
in the Stock Option Grant Notice. In such event, the Option shall be exercisable:

 

		(x)	to the extent that the Option has become exercisable but has not been exercised as of the date of death;
and

 

		(y)	in the event rights to exercise the Option accrue periodically, to the extent of a pro rata portion through
the date of death of any additional vesting rights that would have accrued on the next vesting date had the Participant not died. The
proration shall be based upon the number of days accrued in the current vesting period prior to the Participant’s date of death.

 

5.             METHOD
OF EXERCISING OPTION.

 

Subject to the terms and conditions
of this Agreement, the Option may be exercised by written notice to the Company or its designee, in substantially the form of Exhibit A
attached hereto (or in such other form acceptable to the Company, which may include electronic notice). Such notice shall state the number
of Shares with respect to which the Option is being exercised and shall be signed by the person exercising the Option (which signature
may be provided electronically in a form acceptable to the Company). Payment of the Exercise Price for such Shares shall be made in accordance
with Paragraph 9 of the Plan. The Company shall deliver such Shares as soon as practicable after the notice shall be received, provided,
however, that the Company may delay issuance of such Shares until completion of any action or obtaining of any consent, which the Company
deems necessary under any applicable law (including, without limitation, state securities or “blue sky” laws). The Shares
as to which the Option shall have been so exercised shall be registered in the Company’s share register in the name of the person
so exercising the Option (or, if the Option shall be exercised by the Participant and if the Participant shall so request in the notice
exercising the Option, shall be registered in the Company’s share register in the name of the Participant and another person jointly,
with right of survivorship) and shall be delivered as provided above to or upon the written order of the person exercising the Option.
In the event the Option shall be exercised, pursuant to Section 4 hereof, by any person other than the Participant, such notice shall
be accompanied by appropriate proof of the right of such person to exercise the Option. All Shares that shall be purchased upon the exercise
of the Option as provided herein shall be fully paid and nonassessable.

 

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		6.	PARTIAL EXERCISE.

 

Exercise of this Option to the
extent above stated may be made in part at any time and from time to time within the above limits, except that no fractional share shall
be issued pursuant to this Option.

 

		7.	NON-ASSIGNABILITY.

 

The Option shall not be transferable
by the Participant otherwise than by will or by the laws of descent and distribution. For California Participants, the Option shall not
be transferable other than by will, by the laws of descent and distribution, to a revocable trust or as permitted by Rule 701 of
the Securities Act of 1933. If this Option is a Non-Qualified Option then it may also be transferred pursuant to a qualified domestic
relations order as defined by the Code or Title I of the Employee Retirement Income Security Act or the rules thereunder. Except
as provided above in this paragraph, the Option shall be exercisable, during the Participant’s lifetime, only by the Participant
(or, in the event of legal incapacity or incompetency, by the Participant’s guardian or representative) and shall not be assigned,
pledged or hypothecated in any way (whether by operation of law or otherwise) and shall not be subject to execution, attachment or similar
process. Any attempted transfer, assignment, pledge, hypothecation or other disposition of the Option or of any rights granted hereunder
contrary to the provisions of this Section 7, or the levy of any attachment or similar process upon the Option shall be null and
void.

 

		8.	NO RIGHTS AS STOCKHOLDER UNTIL EXERCISE.

 

The Participant shall have no
rights as a stockholder with respect to Shares subject to this Agreement until registration of the Shares in the Company’s share
register in the name of the Participant. Except as is expressly provided in the Plan with respect to certain changes in the capitalization
of the Company, no adjustment shall be made for dividends or similar rights for which the record date is prior to the date of such registration.

 

		9.	ADJUSTMENTS.

 

The Plan contains provisions
covering the treatment of Options in a number of contingencies such as stock splits and mergers. Provisions in the Plan for adjustment
with respect to stock subject to Options and the related provisions with respect to successors to the business of the Company are hereby
made applicable hereunder and are incorporated herein by reference.

 

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		10.	TAXES.

 

The Participant acknowledges
and agrees that (i) any income or other taxes due from the Participant with respect to this Option or the Shares issuable upon exercise
of this Option shall be the Participant’s responsibility; (ii) the Participant was free to use professional advisors of his
or her choice in connection with this Agreement, has received advice from his or her professional advisors in connection with this Agreement,
understands its meaning and import, and is entering into this Agreement freely and without coercion or duress; (iii) the Participant
has not received and is not relying upon any advice, representations or assurances made by or on behalf of the Company or any Affiliate
or any Employee of or counsel to the Company or any Affiliate regarding any tax or other effects or implications of the Option, the Shares
or other matters contemplated by this Agreement and (iv) neither the Administrator, the Company, its Affiliates, nor any of its officers
or directors, shall be held liable for any applicable costs, taxes, or penalties associated with the Option if, in fact, the Internal
Revenue Service were to determine that the Option constitutes deferred compensation under Section 409A of the Code.

 

If this Option is designated
in the Stock Option Grant Notice as a Non-Qualified Option or if the Option is an ISO and is converted into a Non-Qualified Option and
such Non-Qualified Option is exercised, the Participant agrees that the Company may withhold from the Participant’s remuneration,
if any, the minimum statutory amount of federal, state and local withholding taxes attributable to such amount that is considered compensation
includable in such person’s gross income. At the Company’s discretion, the amount required to be withheld may be withheld
in cash from such remuneration, or in kind from the Shares otherwise deliverable to the Participant on exercise of the Option. The Participant
further agrees that, if the Company does not withhold an amount from the Participant’s remuneration sufficient to satisfy the Company’s
income tax withholding obligation, the Participant will reimburse the Company on demand, in cash, for the amount under-withheld.

 

		11.	PURCHASE FOR INVESTMENT.

 

Unless the offering and sale
of the Shares to be issued upon the particular exercise of the Option shall have been effectively registered under the Securities Act
of 1933, as now in force or hereafter amended (the “1933 Act”), the Company shall be under no obligation to issue the Shares
covered by such exercise unless the Company has determined that such exercise and issuance would be exempt from the registration requirements
of the 1933 Act and until the following conditions have been fulfilled:

 

		(a)	The person(s) who exercise the Option shall warrant to the Company, at the time of such exercise,
that such person(s) are acquiring such Shares for their own respective accounts, for investment, and not with a view to, or for sale
in connection with, the distribution of any such Shares, in which event the person(s) acquiring such Shares shall be bound by the
provisions of the following legend which shall be endorsed upon any certificate(s) evidencing the Shares issued pursuant to such
exercise:

 

“The shares represented by this
certificate have been taken for investment and they may not be sold or otherwise transferred by any person, including a pledgee, unless
(1) either (a) a Registration Statement with respect to such shares shall be effective under the Securities Act of 1933, as
amended, or (b) the Company shall have received an opinion of counsel satisfactory to it that an exemption from registration under
such Act is then available, and (2) there shall have been compliance with all applicable state securities laws;” and

 

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(b)            If
the Company so requires, the Company shall have received an opinion of its counsel that the Shares may be issued upon such particular
exercise in compliance with the 1933 Act without registration thereunder. Without limiting the generality of the foregoing, the Company
may delay issuance of the Shares until completion of any action or obtaining of any consent, which the Company deems necessary under any
applicable law (including without limitation state securities or “blue sky” laws).

 

		12.	RESTRICTIONS ON TRANSFER OF SHARES.

 

12.1         The
Shares acquired by the Participant pursuant to the exercise of the Option granted hereby shall not be transferred by the Participant
except as permitted herein and, if the Participant becomes a party thereto, as set forth in the Right of First Refusal and Co-Sale Agreement,
by and among the Company, the Investors and the Key Holders (each as defined therein) dated November 8, 2011, as may be amended
from time to time (the “Co-Sale Agreement”). If the Participant becomes a party to the Co-Sale Agreement by executing a signature
page thereto and the terms of this Agreement and the Co-Sale Agreement conflict, the terms contained in the Co-Sale Agreement shall
govern and supersede any conflicting provision contained in this Section 12.

 

12.2         In
the event of the Participant’s termination of service for any reason, the Company shall have the option, but not the obligation,
to repurchase all or any part of the Shares issued pursuant to this Agreement (including, without limitation, Shares purchased after
termination of service, Disability or death in accordance with Section 4 hereof). In the event the Company does not, upon the termination
of service of the Participant (as described above), exercise its option pursuant to this Section 12.2, the restrictions set forth
in the balance of this Agreement shall not thereby lapse, and the Participant for himself or herself, his or her heirs, legatees, executors,
administrators and other successors in interest, agrees that the Shares shall remain subject to such restrictions. The following provisions
shall apply to a repurchase under this Section 12.2:

 

		(i)	The per share repurchase price of the Shares to be sold to the Company upon exercise of its option under
this Section 12.2 shall be equal to the Fair Market Value of each such Share determined in accordance with the Plan as of the date
of repurchase provided, however, in the event of a termination by the Company for Cause, the per share repurchase price of the Shares
to be sold to the Company upon exercise of its option under this Section 12.2 shall be equal to the lesser of the Exercise Price
and the Fair Market Value on the date of the repurchase.

 

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		(ii)	The Company’s option to repurchase the Participant’s Shares in the event of termination of
service shall be valid for a period of 12 months commencing with the date of such termination of service.

 

		(iii)	In the event the Company shall be entitled to and shall elect to exercise its option to repurchase the
Participant’s Shares under this Section 12.2, the Company shall notify the Participant, or in case of death, his or her Survivor,
in writing of its intent to repurchase the Shares. Such written notice may be mailed by the Company up to and including the last day of
the time period provided for in Section 12.2(ii) for exercise of the Company’s option to repurchase.

 

		(iv)	The written notice to the Participant shall specify the address at, and the time and date on, which payment
of the repurchase price is to be made (the “Closing”). The date specified shall not be less than ten days nor more than 60
days from the date of the mailing of the notice, and the Participant or his or her successor in interest with respect to the Shares shall
have no further rights as the owner thereof from and after the date specified in the notice. At the Closing, the repurchase price shall
be delivered to the Participant or his or her successor in interest and the Shares being purchased, duly endorsed for transfer, shall,
to the extent that they are not then in the possession of the Company, be delivered to the Company by the Participant or his or her successor
in interest.

 

12.3         As
a condition precedent to the exercise of the Option, the Participant agrees that the Shares acquired pursuant to the exercise of the Option
may be subject to the Co-Sale Agreement and that certain Voting Agreement, by and among the Company, the Investors and the Key Holders
(each as defined therein), dated November 8, 2011, as may be amended from time to time (the “Voting Agreement”) and agrees
to sign a counterpart signature page to the Co-Sale Agreement and the Voting Agreement if so requested by the Company. In addition,
it shall be a condition precedent to the validity of any sale or other transfer of any Shares by the Participant that the following restrictions
be complied with (except as otherwise set forth in this Section 12):

 

		(i)	No Shares owned by the Participant may be sold, pledged or otherwise transferred (including by gift or
devise) to any person or entity, voluntarily, or by operation of law, except in accordance with the terms and conditions hereinafter set
forth.

 

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		(ii)	Before selling or otherwise transferring all or part of the Shares, the Participant shall give written
notice of such intention to the Company, which notice shall include the name of the proposed transferee, the proposed purchase price per
share, the terms of payment of such purchase price and all other matters relating to such sale or transfer and shall be accompanied by
a copy of the binding written agreement of the proposed transferee to purchase the Shares of the Participant. Such notice shall constitute
a binding offer by the Participant to sell to the Company such number of the Shares then held by the Participant as are proposed to be
sold in the notice at the monetary price per share designated in such notice, payable on the terms offered to the Participant by the proposed
transferee (provided, however, that the Company shall not be required to meet any non-monetary terms of the proposed transfer, including,
without limitation, delivery of other securities in exchange for the Shares proposed to be sold). The Company shall give written notice
to the Participant as to whether such offer has been accepted in whole by the Company within 60 days after its receipt of written notice
from the Participant. The Company may only accept such offer in whole and may not accept such offer in part. Such acceptance notice shall
fix a time, location and date for the Closing on such purchase (“Closing Date”) which shall not be less than ten nor more
than sixty days after the giving of the acceptance notice, provided, however, if any of the Shares to be sold pursuant to this Section 12.3
have been held by the Participant for less than six months, then the Closing Date may be extended by the Company until no more than ten
days after such Shares have been held by the Participant for six months if required under applicable accounting rules in effect at
the time. The place for such Closing shall be at the Company’s principal office. At such Closing, the Participant shall accept payment
as set forth herein and shall deliver to the Company in exchange therefor certificates for the number of Shares stated in the notice accompanied
by duly executed instruments of transfer.

 

		(iii)	If the Company shall fail to accept any such offer, the Participant shall be free to sell all, but not
less than all, of the Shares set forth in his or her notice to the designated transferee at the price and terms designated in the Participant’s
notice, provided that (i) such sale is consummated within six months after the giving of notice by the Participant to the Company
as aforesaid, and (ii) the transferee first agrees in writing to be bound by the provisions of this Section 12 so that such
transferee (and all subsequent transferees) shall thereafter only be permitted to sell or transfer the Shares in accordance with the terms
hereof. After the expiration of such six months, the provisions of this Section 12.3 shall again apply with respect to any proposed
voluntary transfer of the Participant’s Shares.

 

		(iv)	The restrictions on transfer contained in this Section 12.3 shall not apply to (a) transfers
by the Participant to his or her spouse or children or to a trust for the benefit of his or her spouse or children, (b) transfers
by the Participant to his or her guardian or conservator, and (c) transfers by the Participant, in the event of his or her death,
to his or her executor(s) or administrator(s) or to trustee(s) under his or her will (collectively, “Permitted Transferees”);
provided however, that in any such event the Shares so transferred in the hands of each such Permitted Transferee shall remain subject
to this Agreement, and each such Permitted Transferee shall so acknowledge in writing as a condition precedent to the effectiveness of
such transfer.

 

		(v)	The provisions of this Section 12.3 may be waived by the Company. Any such waiver may be unconditional
or based upon such conditions as the Company may impose.

 

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12.4         In
the event that the Participant or his or her successor in interest fails to deliver the Shares to be repurchased by the Company under
this Agreement, the Company may elect (a) to establish a segregated account in the amount of the repurchase price, such account to
be turned over to the Participant or his or her successor in interest upon delivery of such Shares, and (b) immediately to take such
action as is appropriate to transfer record title of such Shares from the Participant to the Company and to treat the Participant and
such Shares in all respects as if delivery of such Shares had been made as required by this Agreement. The Participant hereby irrevocably
grants the Company a power of attorney which shall be coupled with an interest for the purpose of effectuating the preceding sentence.

 

12.5         If
the Company shall pay a stock dividend or declare a stock split on or with respect to any of its Common Stock, or otherwise distribute
securities of the Company to the holders of its Common Stock, the number of shares of stock or other securities of the Company issued
with respect to the shares then subject to the restrictions contained in this Agreement shall be added to the Shares subject to the Company’s
rights to repurchase pursuant to this Agreement. If the Company shall distribute to its stockholders shares of stock of another corporation,
the shares of stock of such other corporation, distributed with respect to the Shares then subject to the restrictions contained in this
Agreement, shall be added to the Shares subject to the Company’s rights to repurchase pursuant to this Agreement.

 

12.6         If
the outstanding shares of Common Stock of the Company shall be subdivided into a greater number of shares or combined into a smaller number
of shares, or in the event of a reclassification of the outstanding shares of Common Stock of the Company, or if the Company shall be
a party to a merger, consolidation or capital reorganization, there shall be substituted for the Shares then subject to the restrictions
contained in this Agreement such amount and kind of securities as are issued in such subdivision, combination, reclassification, merger,
consolidation or capital reorganization in respect of the Shares subject immediately prior thereto to the Company’s rights to repurchase
pursuant to this Agreement.

 

12.7         The
Company shall not be required to transfer any Shares on its books which shall have been sold, assigned or otherwise transferred in violation
of this Agreement, or to treat as owner of such Shares, or to accord the right to vote as such owner or to pay dividends to, any person
or organization to which any such Shares shall have been so sold, assigned or otherwise transferred, in violation of this Agreement.

 

12.8         The
provisions of Sections 12.1, 12.2 and 12.3 shall terminate upon the effective date of the registration of the Shares pursuant to the Securities
Exchange Act of 1934.

 

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12.9         The
Participant agrees that in the event the Company proposes to offer for sale to the public any of its equity securities and such Participant
is requested by the Company and any underwriter engaged by the Company in connection with such offering to sign an agreement restricting
the sale or other transfer of Shares, then it will promptly sign such agreement and will not transfer, whether in privately negotiated
transactions or to the public in open market transactions or otherwise, any Shares or other securities of the Company held by him or her
during such period as is determined by the Company and the underwriters, not to exceed 180 days following the closing of the offering,
plus such additional period of time as may be required to comply with NASD Rule 2711 or similar rules thereto (such period,
the “Lock-Up Period”). Such agreement shall be in writing and in form and substance reasonably satisfactory to the Company
and such underwriter and pursuant to customary and prevailing terms and conditions. Notwithstanding whether the Participant has signed
such an agreement, the Company may impose stop-transfer instructions with respect to the Shares or other securities of the Company subject
to the foregoing restrictions until the end of the Lock-Up Period.

 

12.10       The
Participant acknowledges and agrees that neither the Company, its shareholders nor its directors and officers, has any duty or obligation
to disclose to the Participant any material information regarding the business of the Company or affecting the value of the Shares before,
at the time of, or following a termination of the service of the Participant by the Company, including, without limitation, any information
concerning plans for the Company to make a public offering of its securities or to be acquired by or merged with or into another firm
or entity.

 

12.11       All
certificates representing the Shares to be issued to the Participant pursuant to this Agreement shall have endorsed thereon a legend substantially
as follows: “The shares represented by this certificate are subject to restrictions set forth in a Stock Option Agreement dated
_________, 201__ with this Company, a copy of which Agreement is available for inspection at the offices of the Company or will be made
available upon request.”

 

		13.	NO OBLIGATION TO MAINTAIN RELATIONSHIP.

 

The Participant acknowledges
that: (i) the Company is not by the Plan or this Option obligated to continue the Participant as an Employee, director or Consultant
of the Company or an Affiliate; (ii) the Plan is discretionary in nature and may be suspended or terminated by the Company at any
time; (iii) the grant of the Option is a one-time benefit which does not create any contractual or other right to receive future
grants of options, or benefits in lieu of options; (iv) all determinations with respect to any such future grants, including, but
not limited to, the times when options shall be granted, the number of shares subject to each option, the option price, and the time or
times when each option shall be exercisable, will be at the sole discretion of the Company; (v) the Participant’s participation
in the Plan is voluntary; (vi) the value of the Option is an extraordinary item of compensation which is outside the scope of the
Participant’s employment or consulting contract, if any; and (vii) the Option is not part of normal or expected compensation
for purposes of calculating any severance, resignation, redundancy, end of service payments, bonuses, long-service awards, pension or
retirement benefits or similar payments.

 

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		14.	IF OPTION IS INTENDED TO BE AN ISO.

 

If this Option is designated
in the Stock Option Grant Notice as an ISO so that the Participant (or the Participant’s Survivors) may qualify for the favorable
tax treatment provided to holders of Options that meet the standards of Section 422 of the Code then any provision of this Agreement
or the Plan which conflicts with the Code so that this Option would not be deemed an ISO is null and void and any ambiguities shall be
resolved so that the Option qualifies as an ISO. The Participant should consult with the Participant’s own tax advisors regarding
the tax effects of the Option and the requirements necessary to obtain favorable tax treatment under Section 422 of the Code, including,
but not limited to, holding period requirements.

 

Notwithstanding
the foregoing, to the extent that the Option is designated in the Stock Option Grant Notice as an ISO and is not deemed to be
an ISO pursuant to Section 422(d) of the Code because the aggregate Fair Market Value (determined as of the Date of Option
Grant) of any of the Shares with respect to which this ISO is granted becomes exercisable for the first time during any calendar year
in excess of $100,000, the portion of the Option representing such excess value shall be treated as a Non-Qualified Option and the Participant
shall be deemed to have taxable income measured by the difference between the then Fair Market Value of the Shares received upon exercise
and the price paid for such Shares pursuant to this Agreement.

 

Neither the Company nor any
Affiliate shall have any liability to the Participant, or any other party, if the Option (or any part thereof) that is intended to be
an ISO is not an ISO or for any action taken by the Administrator, including without limitation the conversion of an ISO to a Non-Qualified
Option.

 

		15.	NOTICE TO COMPANY OF DISQUALIFYING DISPOSITION OF AN ISO.

 

If this Option is designated
in the Stock Option Grant Notice as an ISO then the Participant agrees to notify the Company in writing immediately after the Participant
makes a Disqualifying Disposition of any of the Shares acquired pursuant to the exercise of the ISO. A Disqualifying Disposition is defined
in Section 424(c) of the Code and includes any disposition (including any sale) of such Shares before the later of (a) two
years after the date the Participant was granted the ISO or (b) one year after the date the Participant acquired Shares by exercising
the ISO, except as otherwise provided in Section 424(c) of the Code. If the Participant has died before the Shares are sold,
these holding period requirements do not apply and no Disqualifying Disposition can occur thereafter.

 

     11

     

    

 

		16.	NOTICES.

 

Any notices required or permitted
by the terms of this Agreement or the Plan shall be given by recognized courier service, facsimile, registered or certified mail, return
receipt requested, addressed as follows:

 

If to the Company:

 

Sera Prognostics, Inc.

417 Wakara Way, Suite 3510

Salt Lake City, UT 84108

 

Attention: Chief Financial Officer

 

If to the Participant at the address set forth on the Stock
Option Grant Notice or to such other address or addresses of which notice in the same manner has previously been given. Any such
notice shall be deemed to have been given upon the earlier of receipt, one business day following delivery to a recognized courier
service or three business days following mailing by registered or certified mail.

 

		17.	GOVERNING LAW.

 

This
Agreement shall be governed by and construed in accordance with the laws of the State of Delaware, without giving effect to the conflict
of law principles thereof. For the purpose of litigating any dispute that arises under this Agreement, the parties hereby consent to exclusive
jurisdiction in Utah and agree that such litigation shall be conducted in the state courts of Salt Lake City, Utah or the federal
courts of the United States for the District of Utah.

 

		18.	BENEFIT OF AGREEMENT.

 

Subject to the provisions of
the Plan and the other provisions hereof, this Agreement shall be for the benefit of and shall be binding upon the heirs, executors, administrators,
successors and assigns of the parties hereto.

 

		19.	ENTIRE AGREEMENT.

 

This Agreement, together with
the Plan, embodies the entire agreement and understanding between the parties hereto with respect to the subject matter hereof and supersedes
all prior oral or written agreements and understandings relating to the subject matter hereof. No statement, representation, warranty,
covenant or agreement not expressly set forth in this Agreement shall affect or be used to interpret, change or restrict, the express
terms and provisions of this Agreement, provided, however, in any event, this Agreement shall be subject to and governed by the Plan.

 

		20.	MODIFICATIONS AND AMENDMENTS.

 

The terms and provisions of
this Agreement may be modified or amended as provided in the Plan.

 

		21.	WAIVERS AND CONSENTS.

 

Except as provided in the Plan,
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.

 

     12

     

    

 

		22.	DATA PRIVACY.

 

By entering into this Agreement,
the Participant: (i) authorizes the Company and each Affiliate, and any agent of the Company or any Affiliate administering the Plan
or providing Plan recordkeeping services, to disclose to the Company or any of its Affiliates such information and data as the Company
or any such Affiliate shall request in order to facilitate the grant of options and the administration of the Plan; and (ii) authorizes
the Company and each Affiliate to store and transmit such information in electronic form for the purposes set forth in this Agreement.

 

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

 

     13

     

    

 

Exhibit A

 

NOTICE OF EXERCISE OF STOCK OPTION

 

[Form for Unregistered Shares]

 

To:      Sera
Prognostics, Inc.

 

Ladies and Gentlemen:

 

I hereby exercise my Stock
Option to purchase __________ shares (the “Shares”) of the common stock, $0.0001 par value, of Sera Prognostics, Inc.
(the “Company”), at the exercise price of $_____ per share, pursuant to and subject to the terms of that certain Stock Option
Agreement between the undersigned and the Company dated ________, 201_.

 

I am aware that the Shares
have not been registered under the Securities Act of 1933, as amended (the “1933 Act”), or any state securities laws. I understand
that the reliance by the Company on exemptions under the 1933 Act is predicated in part upon the truth and accuracy of the statements
by me in this Notice of Exercise.

 

I hereby represent and warrant
that (1) I have been furnished with all information which I deem necessary to evaluate the merits and risks of the purchase of the
Shares; (2) I have had the opportunity to ask questions concerning the Shares and the Company and all questions posed have been answered
to my satisfaction; (3) I have been given the opportunity to obtain any additional information I deem necessary to verify the accuracy
of any information obtained concerning the Shares and the Company; and (4) I have such knowledge and experience in financial and
business matters that I am able to evaluate the merits and risks of purchasing the Shares and to make an informed investment decision
relating thereto.

 

I hereby represent and warrant
that I am purchasing the Shares for my own personal account for investment and not with a view to the sale or distribution of all or any
part of the Shares.

 

I understand that because
the Shares have not been registered under the 1933 Act, I must continue to bear the economic risk of the investment for an indefinite
time and the Shares cannot be sold unless the Shares are subsequently registered under applicable federal and state securities laws or
an exemption from such registration requirements is available.

 

I agree that I will in no
event sell or distribute or otherwise dispose of all or any part of the Shares unless (1) there is an effective registration statement
under the 1933 Act and applicable state securities laws covering any such transaction involving the Shares or (2) the Company receives
an opinion of my legal counsel (concurred in by legal counsel for the Company) stating that such transaction is exempt from registration
or the Company otherwise satisfies itself that such transaction is exempt from registration.

 

    Exhibit A-1

     

    

 

I consent to the placing of
a legend on my certificate for the Shares stating that the Shares have not been registered and setting forth the restriction on transfer
contemplated hereby and to the placing of a stop transfer order on the books of the Company and with any transfer agents against the Shares
until the Shares may be legally resold or distributed without restriction.

 

I understand that at the present
time Rule 144 of the Securities and Exchange Commission (the “SEC”) may not be relied on for the resale or distribution
of the Shares by me. I understand that the Company has no obligation to me to register the sale of the Shares with the SEC and has not
represented to me that it will register the sale of the Shares.

 

I understand the terms and
restrictions on the right to dispose of the Shares set forth in the 2011 Employee, Director and Consultant Equity Incentive Plan and the
Stock Option Agreement, both of which I have carefully reviewed. I consent to the placing of a legend on my certificate for the Shares
referring to such restriction and the placing of stop transfer orders until the Shares may be transferred in accordance with the terms
of such restrictions.

 

I
understand and agree that the Shares may be subject to that certain Voting Agreement, by and among the Company, the Investors
and the Key Holders (each as defined therein), dated November 8, 2011, as may be amended from time to time (the “Voting Agreement”)
and that certain Right of First Refusal and Co-Sale Agreement, by and among the Company, the Investors and the Key Holders (each as defined
therein) dated November 8, 2011, as may be amended from time to time (the “Co-Sale Agreement”),
and if I am not already a party to the Voting Agreement and or the Co-Sale Agreement and if the Company so requests, I agree to
become a party to such agreements by execution of the counterpart signature pages enclosed herewith. I acknowledge that I have read
and understand the Voting Agreement and the Co-Sale Agreement which sets forth certain restrictions and limitations on the Shares, including
the ability to transfer or sell them in the future. I further acknowledge and agree that to the extent the terms of Section 12 of
the Option Agreement conflict with the Co-Sale Agreement, the terms contained in the Co-Sale Agreement shall govern.

 

I have considered the Federal,
state and local income tax implications of the exercise of my Option and the purchase and subsequent sale of the Shares.

 

I am paying the option exercise price for the Shares
as follows:

 

	 	 	 

 

Please issue the Shares (check one):

 

 ̈
to me; or

 

 ̈
to me and ________________, as joint tenants with right of survivorship

 

and mail the certificate to me at the following address:

 

	 	 

	 	 

	 	 

 

    Exhibit A-2

     

    

 

My mailing address for shareholder communications,
if different from the address listed above is:

 

 

	 	 

	 	 

	 	 

 

 

	 	Very truly yours,

 

	 	Participant (signature)

 

	 	Print Name

 

	 	Date

 

	 	Social Security Number

 

    Exhibit A-3

     

    

 

Exhibit B

 

NOTICE OF EXERCISE OF STOCK OPTION

 

[Form for Shares Registered in the
United States]

 

To:      Sera
Prognostics, Inc.

 

IMPORTANT NOTICE: This form of Notice of Exercise may only be used
at such time as the Company has filed a Registration Statement with the Securities and Exchange Commission under which the issuance of
the Shares for which this exercise is being made is registered and such Registration Statement remains effective.

 

Ladies and Gentlemen:

 

I hereby exercise my Stock
Option to purchase _________ shares (the “Shares”) of the common stock, $0.0001 par value, of Sera Prognostics, Inc.
(the “Company”), at the exercise price of $________ per share, pursuant to and subject to the terms of that Stock Option Grant
Notice dated _______________, 201_.

 

I understand the nature of
the investment I am making and the financial risks thereof. I am aware that it is my responsibility to have consulted with competent tax
and legal advisors about the relevant national, state and local income tax and securities laws affecting the exercise of the Option and
the purchase and subsequent sale of the Shares.

 

I am paying the option exercise
price for the Shares as follows:

 

	 	 	 

 

Please issue the Shares (check one):

 

 ̈ to me;
or

 

 ̈
to me and ____________________________, as joint tenants with right of survivorship,

 

at the following address:

 

	 	 	 

	 	 	 

	 	 	 

 

    Exhibit B-1

     

    

 

My mailing address for shareholder
communications, if different from the address listed above, is:

 

	 	 	 

	 	 	 

	 	 	 

 

 

	 	Very truly yours,

 

	 	             Participant (signature)

 

	 	             Print Name

 

	 	             Date

 

	 	             Social Security Number

 

    Exhibit B-2Exhibit 10.3

 

SERA PROGNOSTICS, INC.

 

2021 EQUITY INCENTIVE PLAN

 

1.                 
DEFINITIONS. Unless otherwise specified or unless the context otherwise requires, the following terms, as used in this Sera
Prognostics, Inc. 2021 Equity Incentive Plan, have the following meanings:

 

“Administrator” means the Board
of Directors, unless it has delegated power to act on its behalf to the Committee, in which case the term “Administrator”
means the Committee.

 

“Affiliate” means a corporation
or other entity, which, for purposes of Section 424 of the Code, is a parent or subsidiary of the Company, direct or indirect.

 

“Agreement” means a written
or electronic document setting forth the terms of a Stock Right delivered pursuant to the Plan, in such form as the Administrator shall
approve.

 

“Board of Directors” means
the Board of Directors of the Company.

 

“Cause” means, with respect
to a Participant (a) dishonesty with respect to the Company or any Affiliate, (b) insubordination, substantial malfeasance or non-feasance
of duty, (c) unauthorized disclosure of confidential information, (d) breach by a Participant of any provision of any employment,
consulting, advisory, nondisclosure, non-competition or similar agreement between the Participant and the Company or any Affiliate, and
(e) conduct substantially prejudicial to the business of the Company or any Affiliate; provided, however, that any provision in an agreement
between a Participant and the Company or an Affiliate, which contains a conflicting definition of Cause for termination and which is in
effect at the time of such termination, shall supersede this definition with respect to that Participant. The determination of the Administrator
as to the existence of Cause will be conclusive on the Participant and the Company.

 

“Code” means the United States
Internal Revenue Code of 1986, as amended including any successor statute, regulation and guidance thereto.

 

“Committee” means the committee
of the Board of Directors, if any, to which the Board of Directors has delegated power to act under or pursuant to the provisions of the
Plan.

 

“Common Stock” means shares
of the Company’s class A common stock, $0.0001 par value per share.

 

“Company” means Sera Prognostics,
Inc., a Delaware corporation.

 

“Consultant” means any natural
person who is an advisor or consultant who provides bona fide services to the Company or its Affiliates, provided that such services are
not in connection with the offer or sale of securities in a capital raising transaction, and do not directly or indirectly promote or
maintain a market for the Company’s or its Affiliates’ securities.

 

     

     

    

 

“Corporate Transaction” means
a merger, consolidation, or sale of all or substantially all of the Company’s assets or the acquisition of all of the outstanding
voting stock of the Company in a single transaction or a series of related transactions by a single entity other than a transaction in
which the Company is the surviving corporation. Where a Corporate Transaction involves a tender offer that is reasonably expected to be
followed by a merger (as determined by the Administrator), the Corporate Transaction will be deemed to have occurred upon consummation
of the tender offer

 

“Disability” or “Disabled”
means permanent and total disability as defined in Section 22(e)(3) of the Code.

 

“Employee” means any employee
of the Company or of an Affiliate (including, without limitation, an employee who is also serving as an officer or director of the Company
or of an Affiliate), designated by the Administrator to be eligible to be granted one or more Stock Rights under the Plan.

 

“Exchange Act” means the United
States Securities Exchange Act of 1934, as amended.

 

“Fair Market Value” of a Share
of Common Stock means:

 

If the Common Stock is listed on a national securities
exchange or traded in the over-the-counter market and sales prices are regularly reported for the Common Stock, the closing or, if not
applicable, the last price of the Common Stock on the composite tape or other comparable reporting system for the trading day on the applicable
date and if such applicable date is not a trading day, the last market trading day prior to such date;

 

If the Common Stock is not traded on a national
securities exchange but is traded on the over-the-counter market, if sales prices are not regularly reported for the Common Stock for
the trading day referred to in clause (1), and if bid and asked prices for the Common Stock are regularly reported, the mean between
the bid and the asked price for the Common Stock at the close of trading in the over-the-counter market for the most recent trading day
on which Common Stock was traded on the applicable date and if such applicable date is not a trading day, the last market trading day
prior to such date; and

 

If the Common Stock is neither listed on a national
securities exchange nor traded in the over-the-counter market, such value as the Administrator, in good faith, shall determine in compliance
with applicable laws.

 

“ISO” means a stock option
intended to qualify as an incentive stock option under Section 422.

 

“Non-Qualified Option” means
a stock option which is not intended to qualify as an ISO.

 

“Option” means an ISO or Non-Qualified
Option granted under the Plan.

 

    2

     

    

 

“Participant” means an Employee,
director or Consultant of the Company or an Affiliate to whom one or more Stock Rights are granted under the Plan. As used herein, “Participant”
shall include “Participant’s Survivors” where the context requires.

 

“Performance-Based Award” means
a Stock Grant or Stock-Based Award which vests based on the attainment of written Performance Goals as set forth in Paragraph 9 hereof.

 

“Performance Goals” means performance
goals determined by the Committee in its sole discretion and set forth in an Agreement. The satisfaction of Performance Goals shall be
subject to certification by the Committee. The Committee has the authority to take appropriate action with respect to the Performance
Goals (including, without limitation, making adjustments to the Performance Goals or determining the satisfaction of the Performance Goals
in connection with a Corporate Transaction) provided that any such action does not otherwise violate the terms of the Plan.

 

“Plan” means this Sera Prognostics,
Inc. 2021 Equity Incentive Plan.

 

“SAR” means a stock appreciation
right.

 

“Section 409A” means Section
409A of the Code.

 

“Section 422” means Section
422 of the Code.

 

“Securities Act” means the
United States Securities Act of 1933, as amended.

 

“Shares” means shares of the
Common Stock as to which Stock Rights have been or may be granted under the Plan or any shares of capital stock into which the Shares
are changed or for which they are exchanged within the provisions of Paragraph 3 of the Plan. The Shares issued under the Plan may
be authorized and unissued shares or shares held by the Company in its treasury, or both.

 

“Stock-Based Award” means a
grant by the Company under the Plan of an equity award or an equity based award, which is not an Option or a Stock Grant.

 

“Stock Grant” means a grant
by the Company of Shares under the Plan.

 

“Stock Right” means an ISO,
a Non-Qualified Option, a Stock Grant or a Stock-Based Award or a right to Shares or the value of Shares of the Company granted pursuant
to the Plan.

 

“Substitute Award” means an
award issued under the Plan in substitution for one or more equity awards of an acquired company that are converted, replaced or adjusted
in connection with the acquisition.

 

“Survivor” means a deceased
Participant’s legal representatives and/or any person or persons who acquired the Participant’s rights to a Stock Right by
will or by the laws of descent and distribution.

 

    3

     

    

 

2.                 
PURPOSES OF THE PLAN. The Plan is intended to encourage ownership of Shares by Employees and directors of and certain Consultants
to the Company and its Affiliates in order to attract and retain such people, to induce them to work for the benefit of the Company or
of an Affiliate and to provide additional incentive for them to promote the success of the Company or of an Affiliate. The Plan provides
for the granting of ISOs, Non-Qualified Options, Stock Grants and Stock-Based Awards.

 

3.                 
SHARES SUBJECT TO THE PLAN.

 

(a)                The
number of Shares which may be issued from time to time pursuant to this Plan shall be the sum of: (i) 3,966,162
shares of Common Stock and (ii) any shares of Common Stock that are attributable to awards granted under the Company’s 2011
Employee, Director and Consultant Equity Incentive Plan that are forfeited, expire or are cancelled without delivery of shares of
Common Stock or which result in the forfeiture of shares of Common Stock back to the Company on or after July
7, 2021, or the equivalent of such number of Shares after the Administrator, in its sole discretion, has interpreted the
effect of any stock split, stock dividend, combination, recapitalization or similar transaction in accordance with Paragraph 25 of
this Plan, all of which Shares are eligible to be issued as ISOs; provided, however, that no more than 11,828,903 Shares shall be
added to the Plan pursuant to subsection (ii).

 

(b)              
Notwithstanding Subparagraph (a) above, on the first day of each fiscal year of the Company during the period beginning in fiscal
year 2022, and ending on the second day of fiscal year 2031, the number of Shares that may be issued from time to time pursuant to the
Plan, shall be increased by an amount equal to the lesser of (i) 4% of the number of outstanding shares of Common Stock on such date and
(ii) an amount determined by the Administrator.

 

(c)               
If an Option ceases to be “outstanding”, in whole or in part (other than by exercise), or if the Company shall reacquire
(at not more than its original issuance price) any Shares issued pursuant to a Stock Grant or Stock-Based Award, or if any Stock Right
expires or is forfeited, cancelled, or otherwise terminated or results in any Shares not being issued, the unissued or reacquired Shares
which were subject to such Stock Right shall again be available for issuance from time to time pursuant to this Plan; provided, however,
that the number of Shares underlying any awards under the Plan that are retained or repurchased on the exercise of an Option or the vesting
or issuance of any Stock Right to cover the exercise price and/or tax withholding required by the Company in connection with vesting shall
not be added back to the Shares available for issuance under the Plan; and provided, further that, in the case of ISOs, the foregoing
provisions shall be subject to any limitations under the Code. In addition, any Shares repurchased using exercise price proceeds will
not be available for issuance under the Plan.

 

    4

     

    

 

(d)              
The maximum number of Shares available for grant under the Plan as ISOs will be 80 million shares. The limits set forth in this
Paragraph 3 will be construed to comply with the applicable requirements of Section 422.

 

(e)              
The Administrator may grant Substitute Awards under the Plan. To the extent consistent with the requirements of Section 422 and
the regulations thereunder and other applicable legal requirements (including applicable stock exchange requirements), Shares issued in
respect of Substitute Awards will be in addition to and will not reduce the shares available under the Plan. Notwithstanding the foregoing,
if any Substitute Award is settled in cash or expires, becomes unexercisable, terminates or is forfeited to or repurchased by the Company
without the issuance or retention of Shares, the Shares previously subject to such award will not be available for future issuance under
the Plan. The Administrator will determine the extent to which the terms and conditions of the Plan apply to Substitute Awards, if at
all; provided, however, that Substitute Awards will not be subject to the limits described in Paragraph 4(c) below.

 

4.                 
ADMINISTRATION OF THE PLAN. The Administrator of the Plan will be the Board of Directors, except to the extent the Board
of Directors delegates its authority to the Committee, in which case the Committee shall be the Administrator. Subject to the provisions
of the Plan, the Administrator is authorized to:

 

(a)               
Interpret the provisions of the Plan and all Stock Rights and to make all rules and determinations which it deems necessary or
advisable for the administration of the Plan;

 

(b)               
Determine which Employees, directors and Consultants shall be granted Stock Rights;

 

(c)               
Determine the number of Shares for which a Stock Right or Stock Rights shall be granted; provided, however, that in no event
shall the aggregate grant date fair value (determined in accordance with ASC 718) of Stock Rights to be granted and any other cash compensation
paid to any non-employee director in any calendar year, exceed $750,000, increased to $1,000,000 in the year in which such non-employee
director initially joins the Board of Directors;

 

(d)              
Specify the terms and conditions upon which a Stock Right or Stock Rights may be granted provided that no dividends or dividend
equivalents shall be paid on any Stock Right prior to the vesting of the underlying Shares;

 

(e)              
Amend any term or condition of any outstanding Stock Right, provided that (i) such term or condition as amended is not prohibited
by the Plan; and (ii) any such amendment shall not impair the rights of a Participant under any Stock Right previously granted without
such Participant’s consent or in the event of death of the Participant the Participant’s Survivors;

 

    5

     

    

 

(f)                
Determine and make any adjustments in the Performance Goals included in any Performance-Based Awards; and

 

(g)               
Adopt any sub-plans applicable to residents of any specified jurisdiction as it deems necessary or appropriate in order to comply
with or take advantage of any tax or other laws applicable to the Company, any Affiliate or to Participants or to otherwise facilitate
the administration of the Plan, which sub-plans may include additional restrictions or conditions applicable to Stock Rights or Shares
issuable pursuant to a Stock Right;

 

(h)              
Subject to the foregoing, the interpretation and construction by the Administrator of any provisions of the Plan or of any Stock
Right granted under it shall be final, unless otherwise determined by the Board of Directors, if the Administrator is the Committee. In
addition, if the Administrator is the Committee, the Board of Directors may take any action under the Plan that would otherwise be the
responsibility of the Committee.

 

To the extent permitted under
applicable law, the Board of Directors or the Committee may allocate all or any portion of its responsibilities and powers to any one
or more of its members and may delegate all or any portion of its responsibilities and powers to any other person selected by it. The
Board of Directors or the Committee may revoke any such allocation or delegation at any time. Notwithstanding the foregoing, only the
Board of Directors or the Committee shall be authorized to grant a Stock Right to any director of the Company or to any “officer”
of the Company as defined by Rule 16a-1 under the Exchange Act.

 

5.                 
ELIGIBILITY FOR PARTICIPATION. The Administrator will, in its sole discretion, name the Participants in the Plan; provided,
however, that each Participant must be an Employee, director or Consultant of the Company or of an Affiliate at the time a Stock Right
is granted. Notwithstanding the foregoing, the Administrator may authorize the grant of a Stock Right to a person in anticipation of such
person becoming an Employee, director or Consultant of the Company or of an Affiliate; provided, that the actual grant of such Stock Right
shall be conditioned upon such person becoming eligible to become a Participant at or prior to the time of the execution of the Agreement
evidencing such Stock Right. ISOs may be granted only to Employees. Non-Qualified Options, Stock Grants and Stock-Based Awards may be
granted to any Employee, director or Consultant of the Company or an Affiliate. The granting of any Stock Right to any individual shall
neither entitle that individual to, nor disqualify that individual from, participation in any other grant of Stock Rights or any grant
under any other benefit plan established by the Company or any Affiliate for Employees, directors or Consultants.

 

6.                 
TERMS AND CONDITIONS OF OPTIONS. Each Option shall be set forth in an Option Agreement, duly executed by the Company and,
to the extent required by law or requested by the Company, by the Participant. The Administrator may provide that Options be granted subject
to such terms and conditions, consistent with the terms and conditions specifically required under this Plan, as the Administrator may
deem appropriate including, without limitation, subsequent approval by the shareholders of the Company of this Plan or any amendments
thereto. The Option Agreements shall be subject to at least the following terms and conditions:

 

    6

     

    

 

(a)               
Non-Qualified Options: Each Option intended to be a Non-Qualified Option shall be subject to the terms and conditions which
the Administrator determines to be appropriate and in the best interest of the Company, subject to the following minimum standards for
any such Non-Qualified Option:

 

		(i)	Exercise Price: Each Option Agreement shall state the exercise price (per share) of the Shares
covered by each Option, which exercise price shall be determined by the Administrator and shall be at least equal to the Fair Market Value
per share of the Common Stock on the date of grant of the Option.

 

		(ii)	Number of Shares: Each Option Agreement shall state the number of Shares to which it pertains.

 

		(iii)	Vesting: Each Option Agreement shall state the date or dates on which it first is exercisable and
the date after which it may no longer be exercised, and may provide that the Option rights accrue or become exercisable in installments
over a period of months or years, or upon the occurrence of certain performance conditions or the attainment of stated goals or events.

 

		(iv)	Additional Conditions: Exercise of any Option may be conditioned upon the Participant’s execution
of a shareholders agreement in a form satisfactory to the Administrator providing for certain protections for the Company and its other
shareholders, including requirements that:

 

		(A)	The Participant’s or the Participant’s Survivors’ right to sell or transfer the Shares
may be restricted; and

 

		(B)	The Participant or the Participant’s Survivors may be required to execute letters of investment
intent and must also acknowledge that the Shares will bear legends noting any applicable restrictions.

 

		(v)	Term of Option: Each Option shall terminate not more than ten years from the date of the grant
or at such earlier time as the Option Agreement may provide.

 

(b)              
ISOs: Each Option intended to be an ISO shall be issued only to an Employee who is deemed to be a resident of the United
States for tax purposes, and shall be subject to the following terms and conditions, with such additional restrictions or changes as the
Administrator determines are appropriate but not in conflict with Section 422 and relevant regulations and rulings of the Internal Revenue
Service:

 

		(i)	Minimum Standards: The ISO shall meet the minimum standards required of Non-Qualified Options,
as described in Paragraph 6(a) above, except clause (i) and (v) thereunder.

 

		(ii)	Exercise Price: Immediately before the ISO is granted, if the Participant owns, directly or by
reason of the applicable attribution rules in Section 424(d) of the Code:

 

    7

     

    

 

		(A)	10% or less of the total combined voting power of all classes of stock of the Company or an Affiliate,
the exercise price per share of the Shares covered by each ISO shall not be less than 100% of the Fair Market Value per share of the Common
Stock on the date of grant of the Option; or

 

		(B)	More than 10% of the total combined voting power of all classes of stock of the Company or an Affiliate,
the exercise price per share of the Shares covered by each ISO shall not be less than 110% of the Fair Market Value per share of the Common
Stock on the date of grant of the Option.

 

		(iii)	Term of Option: For Participants who own:

 

		(A)	10% or less of the total combined voting power of all classes of stock of the Company or an Affiliate,
each ISO shall terminate not more than ten years from the date of the grant or at such earlier time as the Option Agreement may provide;
or

 

		(B)	More than 10% of the total combined voting power of all classes of stock of the Company or an Affiliate,
each ISO shall terminate not more than five years from the date of the grant or at such earlier time as the Option Agreement may provide.

 

		(iv)	Limitation on Yearly Exercise: To the extent that aggregate Fair Market Value (determined on the
date each ISO is granted) of the Shares with respect to which ISOs are exercisable for the first time by the Participant in any calendar
year exceeds $100,000, such Options shall be treated as Non-Qualified Options even if denominated ISOs at grant.

 

		(A)	Except in connection with a corporate transaction involving the Company (which term includes, without
limitation, any stock dividend, stock split, extraordinary cash dividend, recapitalization, reorganization, merger, consolidation, split-up,
spin-off, combination or exchange of shares) or as otherwise contemplated by Paragraph 24 below, the Company may not, without obtaining
stockholder approval, (i) amend the terms of outstanding Options to reduce the exercise price of such Options, (ii) cancel outstanding
Options in exchange for Options that have an exercise price that is less than the exercise price value of the original Options, or (iii)
cancel outstanding Options that have an exercise price greater than the Fair Market Value of a Share on the date of such cancellation
in exchange for cash or other consideration.

 

7.                 
TERMS AND CONDITIONS OF STOCK GRANTS. Each Stock Grant to a Participant shall state the principal terms in an Agreement
duly executed by the Company and, to the extent required by law or requested by the Company, by the Participant. The Agreement shall be
in a form approved by the Administrator and shall contain terms and conditions which the Administrator determines to be appropriate and
in the best interest of the Company, subject to the following minimum standards:

 

    8

     

    

 

(a)               
Each Agreement shall state the purchase price per share, if any, of the Shares covered by each Stock Grant, which purchase price
shall be determined by the Administrator but shall not be less than the minimum consideration required by the Delaware General Corporation
Law, on the date of the grant of the Stock Grant;

 

(b)              
Each Agreement shall state the number of Shares to which the Stock Grant pertains;

 

(c)               
Each Agreement shall include the terms of any right of the Company to restrict or reacquire the Shares subject to the Stock Grant,
including the time period or attainment of Performance Goals or such other performance criteria upon which such rights shall accrue and
the purchase price therefor, if any; and

 

(d)              
Dividends (other than stock dividends to be issued pursuant to Section 25 of the Plan) may accrue but shall not be paid prior
to the time, and may be paid only to the extent that the restrictions or rights to reacquire the Shares subject to the Stock Grant lapse.
Any entitlement to dividend equivalents or similar entitlements will be established and administered either consistent with an exemption
from, or in compliance with the applicable requirements of Section 409A.

 

8.                 
TERMS AND CONDITIONS OF OTHER STOCK-BASED AWARDS. The Administrator shall have the right to grant other Stock-Based Awards
based upon the Common Stock having such terms and conditions as the Administrator may determine, including, without limitation, the grant
of Shares based upon certain conditions, the grant of securities convertible into Shares and the grant of SARs, phantom stock awards or
stock units. The principal terms of each Stock-Based Award shall be set forth in an Agreement, duly executed by the Company and, to the
extent required by law or requested by the Company, by the Participant. The Agreement shall be in a form approved by the Administrator
and shall contain terms and conditions which the Administrator determines to be appropriate and in the best interest of the Company. Each
Agreement shall include the terms of any right of the Company including the right to terminate the Stock-Based Award without the issuance
of Shares, the terms of any vesting conditions, Performance Goals or events upon which Shares shall be issued, provided that dividends
(other than stock dividends to be issued pursuant to Section 25 of the Plan) or dividend equivalents may accrue but shall not be paid
prior to and may be paid only to the extent that the Shares subject to the Stock-Based Award vest. Under no circumstances may the Agreement
covering SARs (a) have an exercise or base price (per share) that is less than the Fair Market Value per share of Common Stock on
the date of grant or (b) expire more than ten years following the date of grant.

 

9.                 
PERFORMANCE-BASED AWARDS. The Committee shall determine whether, with respect to a performance period, the applicable Performance
Goals have been met with respect to a given Participant and, if they have, to so certify and ascertain the amount of the applicable Performance-Based
Award. No Performance-Based Awards will be issued for such performance period until such certification is made by the Committee. The number
of Shares issued in respect of a Performance-Based Award determined by the Committee for a performance period shall be paid to the Participant
at such time as determined by the Committee in its sole discretion after the end of such performance period, and any dividends (other
than stock dividends to be issued pursuant to Section 25 of the Plan) or dividend equivalents that accrue shall only be paid in respect
of the number of Shares earned in respect of such Performance-Based Award.

 

    9

     

    

 

10.             
EXERCISE OF OPTIONS AND ISSUE OF SHARES. An Option (or any part or installment thereof) shall be exercised by giving
written notice to the Company or its designee (in a form acceptable to the Administrator, which may include electronic notice), together
with provision for payment of the aggregate exercise price in accordance with this Paragraph for the Shares as to which the Option is
being exercised, and upon compliance with any other condition(s) set forth in the Option Agreement. Such notice shall be signed by the
person exercising the Option (which signature may be provided electronically in a form acceptable to the Administrator), shall state the
number of Shares with respect to which the Option is being exercised and shall contain any representation required by the Plan or the
Option Agreement. Payment of the exercise price for the Shares as to which such Option is being exercised shall be made (a) in United
States dollars in cash or by check; or (b) at the discretion of the Administrator, through delivery of shares of Common Stock held
for at least six months (if required to avoid negative accounting treatment) having a Fair Market Value equal as of the date of the exercise
to the aggregate cash exercise price for the number of Shares as to which the Option is being exercised; or (c) at the discretion
of the Administrator, by having the Company retain from the Shares otherwise issuable upon exercise of the Option, a number of Shares
having a Fair Market Value equal as of the date of exercise to the aggregate exercise price for the number of Shares as to which the Option
is being exercised; or (d) at the discretion of the Administrator, in accordance with a cashless exercise program established with a securities
brokerage firm, and approved by the Administrator; or (e) at the discretion of the Administrator, by any combination of (a), (b), (c)
and (d) above or (f) at the discretion of the Administrator, by payment of such other lawful consideration as the Administrator may determine.
Notwithstanding the foregoing, the Administrator shall accept only such payment on exercise of an ISO as is permitted by Section 422.

 

The Company shall then reasonably
promptly deliver the Shares as to which such Option was exercised to the Participant (or to the Participant’s Survivors, as the
case may be). In determining what constitutes “reasonably promptly,” it is expressly understood that the issuance and delivery
of the Shares may be delayed by the Company if the Administrator determines it is necessary to comply with any law or regulation (including,
without limitation, federal securities laws) that requires the Company to take any action with respect to the Shares prior to their issuance.
The Shares shall, upon delivery, be fully paid, non-assessable Shares.

 

11.             
PAYMENT IN CONNECTION WITH THE ISSUANCE OF STOCK GRANTS AND STOCK-BASED AWARDS AND ISSUE OF SHARES. Any Stock Grant or Stock-Based
Award requiring payment of a purchase price for the Shares as to which such Stock Grant or Stock-Based Award is being granted shall be
made (a) in United States dollars in cash or by check; or (b) at the discretion of the Administrator, through delivery of shares of Common
Stock held for at least six months (if required to avoid negative accounting treatment) and having a Fair Market Value equal as of the
date of payment to the purchase price of the Stock Grant or Stock-Based Award; or (c) by delivery of a promissory note, if the Board of
Directors has expressly authorized the loan of funds to the Participant for the purpose of enabling or assisting the Participant to effect
such purchase; (d) at the discretion of the Administrator, by any combination of (a) through (c) above; or (e) at the discretion of the
Administrator, by payment of such other lawful consideration as the Administrator may determine.

 

    10

     

    

 

The Company shall when required
by the applicable Agreement, reasonably promptly deliver the Shares as to which such Stock Grant or Stock-Based Award was made to the
Participant (or to the Participant’s Survivors, as the case may be), subject to any escrow provision set forth in the applicable
Agreement. In determining what constitutes “reasonably promptly,” it is expressly understood that the issuance and delivery
of the Shares may be delayed by the Company if the Administrator determines it is necessary to comply with any law or regulation (including,
without limitation, federal securities laws) which requires the Company to take any action with respect to the Shares prior to their issuance.

 

12.             
RIGHTS AS A SHAREHOLDER. No Participant to whom a Stock Right has been granted shall have rights as a shareholder with respect
to any Shares covered by such Stock Right except after due exercise of an Option or issuance of Shares as set forth in any Agreement,
tender of the aggregate exercise or purchase price, if any, for the Shares being purchased and registration of the Shares in the Company’s
share register in the name of the Participant. In addition, at the discretion of the Administrator, the Company shall have received an
opinion of its counsel that the Shares may be issued in compliance with the Securities Act without registration thereunder.

 

13.             
ASSIGNABILITY AND TRANSFERABILITY OF STOCK RIGHTS. By its terms, a Stock Right granted to a Participant shall not be transferable
by the Participant other than (i) by will or by the laws of descent and distribution, or (ii) as approved by the Administrator in its
discretion and set forth in the applicable Agreement provided that no Stock Right may be transferred by a Participant for value. Notwithstanding
the foregoing, an ISO transferred except in compliance with clause (i) above shall no longer qualify as an ISO. The designation of a beneficiary
of a Stock Right by a Participant, with the prior approval of the Administrator and in such form as the Administrator shall prescribe,
shall not be deemed a transfer prohibited by this Paragraph. Except as provided above during the Participant’s lifetime a Stock
Right shall only be exercisable by or issued to such Participant (or such Participant’s legal representative) and shall not be assigned,
pledged or hypothecated in any way (whether by operation of law or otherwise) and shall not be subject to execution, attachment or similar
process. Any attempted transfer, assignment, pledge, hypothecation or other disposition of any Stock Right or of any rights granted thereunder
contrary to the provisions of this Plan, or the levy of any attachment or similar process upon a Stock Right, shall be null and void.

 

14.             
EFFECT ON OPTIONS OF TERMINATION OF SERVICE OTHER THAN FOR CAUSE OR DEATH OR DISABILITY. Except as otherwise provided in
a Participant’s Option Agreement, in the event of a termination of service (whether as an Employee, director or Consultant) with
the Company or an Affiliate before the Participant has exercised an Option, the following rules apply:

 

    11

     

    

 

 

(a)               
A Participant who ceases to be an Employee, director or Consultant of the Company or of an Affiliate (for any reason other than
termination for Cause, Disability, or death for which events there are special rules in Paragraphs 15, 16, and 17, respectively), may
exercise any Option granted to such Participant to the extent that the Option is exercisable on the date of such termination of service,
but only within such term as the Administrator has designated in a Participant’s Option Agreement.

 

(b)              
Except as provided in Subparagraph (c) below, or Paragraph 16 or 17, in no event may an Option intended to be an ISO, be exercised
later than three months after the Participant’s termination of employment.

 

(c)               
The provisions of this Paragraph, and not the provisions of Paragraph 16 or 17, shall apply to a Participant who subsequently becomes
Disabled or dies after the termination of employment, director status or consultancy; provided, however, in the case of a Participant’s
Disability or death within three months after the termination of employment, director status or consultancy, the Participant or the Participant’s
Survivors may exercise the Option within one year after the date of the Participant’s termination of service, but in no event after
the date of expiration of the term of the Option.

 

(d)              
Notwithstanding anything herein to the contrary, if subsequent to a Participant’s termination of employment, termination
of director status or termination of consultancy, but prior to the exercise of an Option, the Administrator determines that, either prior
or subsequent to the Participant’s termination, the Participant engaged in conduct which would constitute Cause, then such Participant
shall forthwith cease to have any right to exercise any Option.

 

(e)              
A Participant to whom an Option has been granted under the Plan who is absent from the Company or an Affiliate because of temporary
disability (any disability other than a Disability as defined in Paragraph 1 hereof), or who is on leave of absence for any purpose, shall
not, during the period of any such absence, be deemed, by virtue of such absence alone, to have terminated such Participant’s employment,
director status or consultancy with the Company or with an Affiliate, except as the Administrator may otherwise expressly provide; provided,
however, that, for ISOs, any leave of absence granted by the Administrator of greater than three months, unless pursuant to a contract
or statute that guarantees the right to reemployment, shall cause such ISO to become a Non-Qualified Option on the date that is six months
following the commencement of such leave of absence.

 

(f)                
Except as required by law or as set forth in a Participant’s Option Agreement, Options granted under the Plan shall not be
affected by any change of a Participant’s status within or among the Company and any Affiliates, so long as the Participant continues
to be an Employee, director or Consultant of the Company or any Affiliate.

 

    12

     

    

 

15.             
EFFECT ON OPTIONS OF TERMINATION OF SERVICE FOR CAUSE. Except as otherwise provided in a Participant’s Option Agreement,
the following rules apply if the Participant’s service (whether as an Employee, director or Consultant) with the Company or an Affiliate
is terminated for Cause prior to the time that all such Participant’s outstanding Options have been exercised:

 

(a)               
All outstanding and unexercised Options as of the time the Participant is notified such Participant’s service is terminated
for Cause will immediately be forfeited.

 

(b)              
Cause is not limited to events which have occurred prior to a Participant’s termination of service, nor is it necessary that
the Administrator’s finding of Cause occur prior to termination. If the Administrator determines, subsequent to a Participant’s
termination of service but prior to the exercise of an Option, that either prior or subsequent to the Participant’s termination
the Participant engaged in conduct which would constitute Cause, then the right to exercise any Option is forfeited.

 

16.           EFFECT
ON OPTIONS OF TERMINATION OF SERVICE FOR DISABILITY. Except as otherwise provided in a Participant’s Option Agreement:

 

(a)               
A Participant who ceases to be an Employee, director or Consultant of the Company or of an Affiliate by reason of Disability may
exercise any Option granted to such Participant to the extent that the Option has become exercisable but has not been exercised on the
date of the Participant’s termination of service due to Disability; and in the event rights to exercise the Option accrue periodically,
to the extent of a pro rata portion through the date of the Participant’s termination of service due to Disability of any additional
vesting rights that would have accrued on the next vesting date had the Participant not become Disabled. The proration shall be based
upon the number of days accrued in the current vesting period prior to the date of the Participant’s termination of service due
to Disability.

 

(b)              
A Disabled Participant may exercise the Option only within the period ending one year after the date of the Participant’s
termination of service due to Disability, notwithstanding that the Participant might have been able to exercise the Option as to some
or all of the Shares on a later date if the Participant had not been terminated due to Disability and had continued to be an Employee,
director or Consultant or, if earlier, within the originally prescribed term of the Option.

 

(c)               
The Administrator shall make the determination both of whether Disability has occurred and the date of its occurrence (unless a
procedure for such determination is set forth in another agreement between the Company and such Participant, in which case such procedure
shall be used for such determination). If requested, the Participant shall be examined by a physician selected or approved by the Administrator,
the cost of which examination shall be paid for by the Company.

 

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17.           EFFECT
ON OPTIONS OF DEATH WHILE AN EMPLOYEE, DIRECTOR OR CONSULTANT. Except as otherwise provided in a Participant’s Option Agreement:

 

(a)               
In the event of the death of a Participant while the Participant is an Employee, director or Consultant of the Company or of an
Affiliate, such Option may be exercised by the Participant’s Survivors to the extent that the Option has become exercisable but
has not been exercised on the date of death; and in the event rights to exercise the Option accrue periodically, to the extent of a pro
rata portion through the date of death of any additional vesting rights that would have accrued on the next vesting date had the Participant
not died. The proration shall be based upon the number of days accrued in the current vesting period prior to the Participant’s
date of death.

 

(b)              
If the Participant’s Survivors wish to exercise the Option, they must take all necessary steps to exercise the Option within
one year after the date of death of such Participant, notwithstanding that the decedent might have been able to exercise the Option as
to some or all of the Shares on a later date if he or she had not died and had continued to be an Employee, director or Consultant or,
if earlier, within the originally prescribed term of the Option.

 

18.           EFFECT
OF TERMINATION OF SERVICE ON UNACCEPTED STOCK GRANTS AND STOCK-BASED AWARDS. In the event of a termination of service (whether as
an Employee, director or Consultant) with the Company or an Affiliate for any reason before the Participant has accepted a Stock Grant
or a Stock-Based Award and paid the purchase price, if required, such grant shall terminate.

 

For purposes of this Paragraph
18 and Paragraph 19 below, a Participant to whom a Stock Grant or a Stock-Based Award has been issued under the Plan who is absent from
work with the Company or with an Affiliate because of temporary disability (any disability other than a Disability as defined in Paragraph
1 hereof), or who is on leave of absence for any purpose, shall not, during the period of any such absence, be deemed, by virtue of such
absence alone, to have terminated such Participant’s employment, director status or consultancy with the Company or with an Affiliate,
except as the Administrator may otherwise expressly provide.

 

In addition, for purposes
of this Paragraph 18 and Paragraph 19 below, any change of employment or other service within or among the Company and any Affiliates
shall not be treated as a termination of employment, director status or consultancy so long as the Participant continues to be an Employee,
director or Consultant of the Company or any Affiliate.

 

19.           EFFECT
ON STOCK GRANTS AND STOCK-BASED AWARDS OF TERMINATION OF SERVICE OTHER THAN FOR CAUSE, DEATH or DISABILITY. Except as otherwise provided
in a Participant’s Agreement, in the event of a termination of service for any reason (whether as an Employee, director or Consultant),
other than termination for Cause, death or Disability for which there are special rules in Paragraphs 20, 21, and 22 below, before all
forfeiture provisions or Company rights of repurchase shall have lapsed, then the Company shall have the right to cancel or repurchase
that number of Shares subject to a Stock Grant or Stock-Based Award as to which the Company’s forfeiture or repurchase rights have
not lapsed.

 

    14

     

    

 

20.           EFFECT
ON STOCK GRANTS AND STOCK-BASED AWARDS OF TERMINATION OF SERVICE FOR CAUSE. Except as otherwise provided in a Participant’s
Agreement, the following rules apply if the Participant’s service (whether as an Employee, director or Consultant) with the Company
or an Affiliate is terminated for Cause:

 

(a)               
All Shares subject to any Stock Grant or Stock-Based Award that remain subject to forfeiture provisions or as to which the Company
shall have a repurchase right shall be immediately forfeited to the Company as of the time the Participant is notified that such Participant’s
service is terminated for Cause.

 

(b)              
Cause is not limited to events which have occurred prior to a Participant’s termination of service, nor is it necessary that
the Administrator’s finding of Cause occur prior to termination. If the Administrator determines, subsequent to a Participant’s
termination of service, that either prior or subsequent to the Participant’s termination the Participant engaged in conduct which
would constitute Cause, then all Shares subject to any Stock Grant or Stock-Based Award that remained subject to forfeiture provisions
or as to which the Company had a repurchase right on the date of termination shall be immediately forfeited to the Company.

 

21.           EFFECT
ON STOCK GRANTS AND STOCK-BASED AWARDS OF TERMINATION OF SERVICE FOR DISABILITY. Except as otherwise provided in a Participant’s
Agreement, the following rules apply if a Participant ceases to be an Employee, director or Consultant of the Company or of an Affiliate
by reason of Disability: to the extent the forfeiture provisions or the Company’s rights of repurchase have not lapsed on the date
of Disability, they shall be exercisable; provided, however, that in the event such forfeiture provisions or rights of repurchase lapse
periodically, such provisions or rights shall lapse to the extent of a pro rata portion of the Shares subject to such Stock Grant or
Stock-Based Award through the date of Disability as would have lapsed had the Participant not become Disabled. The proration shall be
based upon the number of days accrued prior to the date of Disability.

 

The Administrator shall make
the determination both as to whether Disability has occurred and the date of its occurrence (unless a procedure for such determination
is set forth in another agreement between the Company and such Participant, in which case such procedure shall be used for such determination).
If requested, the Participant shall be examined by a physician selected or approved by the Administrator, the cost of which examination
shall be paid for by the Company.

 

22.           EFFECT
ON STOCK GRANTS AND STOCK-BASED AWARDS OF DEATH WHILE AN EMPLOYEE, DIRECTOR OR CONSULTANT. Except as otherwise provided in a Participant’s
Agreement, the following rules apply in the event of the death of a Participant while the Participant is an Employee, director or Consultant
of the Company or of an Affiliate: to the extent the forfeiture provisions or the Company’s rights of repurchase have not lapsed
on the date of death, they shall be exercisable; provided, however, that in the event such forfeiture provisions or rights of repurchase
lapse periodically, such provisions or rights shall lapse to the extent of a pro rata portion of the Shares subject to such Stock Grant
or Stock-Based Award through the date of death as would have lapsed had the Participant not died. The proration shall be based upon the
number of days accrued prior to the Participant’s date of death.

 

    15

     

    

 

23.           PURCHASE
FOR INVESTMENT.

 

(a)               
Unless the offering and sale of the Shares shall have been effectively registered under the Securities Act, the Company shall be
under no obligation to issue Shares under the Plan unless and until the following conditions have been fulfilled:

 

(b)              
The person who receives a Stock Right shall warrant to the Company, prior to the receipt of Shares, that such person is acquiring
such Shares for such person’s own account, for investment, and not with a view to, or for sale in connection with, the distribution
of any such Shares, in which event the person acquiring such Shares shall be bound by the provisions of the following legend (or a legend
in substantially similar form) which shall be endorsed upon the certificate evidencing the Shares issued pursuant to such exercise or
such grant of a Stock Right:

 

“The shares
represented by this certificate have been taken for investment and they may not be sold or otherwise transferred by any person, including
a pledgee, unless (1) either (a) a Registration Statement with respect to such shares shall be effective under the Securities Act
of 1933, as amended, or (b) the Company shall have received an opinion of counsel satisfactory to it that an exemption from registration
under such Act is then available, and (2) there shall have been compliance with all applicable state securities laws.”

 

24.           DISSOLUTION OR LIQUIDATION OF THE COMPANY. Upon the dissolution or liquidation of the Company, all Options granted under
this Plan which as of such date shall not have been exercised and all Stock Grants and Stock-Based Awards which have not been accepted,
to the extent required under the applicable Agreement, will terminate and become null and void; provided, however, that if the rights
of a Participant or a Participant’s Survivors have not otherwise terminated and expired, the Participant or the Participant’s
Survivors will have the right immediately prior to such dissolution or liquidation to exercise or accept any Stock Right to the extent
that the Stock Right is exercisable or subject to acceptance as of the date immediately prior to such dissolution or liquidation. Upon
the dissolution or liquidation of the Company, any outstanding Stock-Based Awards shall immediately terminate unless otherwise determined
by the Administrator or specifically provided in the applicable Agreement.

 

25.           ADJUSTMENTS.
Upon the occurrence of any of the following events, a Participant’s rights with respect to any Stock Right granted to such Participant
hereunder shall be adjusted as hereinafter provided, unless otherwise specifically provided in a Participant’s Agreement.

 

(a)               
Stock Dividends and Stock Splits.

 

	(i)	If (1) the shares of Common Stock shall be subdivided or combined into a greater or smaller number
of shares or if the Company shall issue any shares of Common Stock as a stock dividend on its outstanding Common Stock, or (2) additional
shares or new or different shares or other securities of the Company or other non-cash assets are distributed with respect to such shares
of Common Stock, each Stock Right and the number of shares of Common Stock deliverable thereunder shall be appropriately increased or
decreased proportionately, and appropriate adjustments shall be made including, in the exercise, base or purchase price per share and
in the Performance Goals applicable to outstanding Performance-Based Awards to reflect such events. The number of Shares subject to the
limitations in Paragraphs 3(a) and 4(c) shall also be proportionately adjusted upon the occurrence of such events.

 

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	(ii)	The Administrator may also make adjustments of the type described in Paragraph 25(a) above to take into
account distributions to stockholders other than those provided for in Paragraphs 25(b) below, or any other event, if the Administrator
determines that adjustments are appropriate to avoid distortion in the operation of the Plan or any award, having due regard for the qualification
of ISOs under Section 422, the requirements of Section 409A, to the extent applicable.

 

	(iii)	References in the Plan to Shares will be construed to include any stock or securities resulting from an
adjustment pursuant to this Paragraph 25(a).

 

(b)              
Corporate Transactions. If the Company is to be consolidated with or acquired by another entity in a Corporate Transaction,
the Administrator or the board of directors of any entity assuming the obligations of the Company hereunder (the “Successor Board”),
may, as to outstanding Options, take any of the following actions: (i) make appropriate provision for the continuation of such Options
by substituting on an equitable basis for the Shares then subject to such Options either the consideration payable with respect to the
outstanding shares of Common Stock in connection with the Corporate Transaction or securities of any successor or acquiring entity; or
(ii) upon written notice to the Participants, provide that such Options must be exercised (either (A) to the extent then exercisable or
(B) at the discretion of the Administrator, any such Options being made partially or fully exercisable for purposes of this Subparagraph),
within a specified number of days of the date of such notice, at the end of which period such Options which have not been exercised shall
terminate; or (iii) terminate such Options in exchange for payment of an amount equal to the consideration payable upon consummation of
such Corporate Transaction to a holder of the number of shares of Common Stock into which such Option would have been exercisable (either
(A) to the extent then exercisable or, (B) at the discretion of the Administrator, any such Options being made partially or fully exercisable
for purposes of this Subparagraph) less the aggregate exercise price thereof. For purposes of determining the payments to be made
pursuant to Subclause (iii) above, in the case of a Corporate Transaction the consideration for which, in whole or in part, is other than
cash, the consideration other than cash shall be valued at the fair value thereof as determined in good faith by the Board of Directors.
For the avoidance of doubt, if the per share exercise price of an Option or portion thereof is equal to or greater than the Fair Market
Value of one Share of Common Stock, such Option may be cancelled with no payment due hereunder or otherwise in respect thereof.

 

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With respect to outstanding
Stock Grants or Stock-Based Awards, the Administrator or the Successor Board, shall make appropriate provision for the continuation of
such Stock Grants or Stock-Based Awards on the same terms and conditions by substituting on an equitable basis for the Shares then subject
to such Stock Grants or Stock-Based Awards either the consideration payable with respect to the outstanding Shares of Common Stock in
connection with the Corporate Transaction or securities of any successor or acquiring entity. In lieu of the foregoing, in connection
with any Corporate Transaction, the Administrator may provide that each outstanding Stock Grant or Stock-Based Award shall be terminated
in exchange for payment of an amount equal to the consideration payable upon consummation of such Corporate Transaction to a holder of
the number of shares of Common Stock comprising such Stock Grant or Stock-Based Award (to the extent such Stock Grant or Stock-Based Award
is no longer subject to any forfeiture or repurchase rights then in effect or, at the discretion of the Administrator, all forfeiture
and repurchase rights being waived). For the avoidance of doubt, if the purchase or base price of a Stock Grant or Stock-Based Award or
portion thereof is equal to or greater than the Fair Market Value of one Share of Common Stock, such Stock Grant or Stock-Based Award,
as applicable, may be cancelled with no payment due hereunder or otherwise in respect thereof.

 

In taking any of the actions
permitted under this Paragraph 25(b), the Administrator shall not be obligated by the Plan to treat all Stock Rights, all Stock Rights
held by a Participant, or all Stock Rights of the same type, identically.

 

A Stock Right may be subject
to additional acceleration of vesting and exercisability upon or after a Change of Control as may be provided in the Agreement for such
Stock Right, in any other written agreement between the Company or any Affiliate and the Participant or in any director compensation policy
of the Company.

 

(c)               
Recapitalization or Reorganization. In the event of a recapitalization or reorganization of the Company other than a Corporate
Transaction pursuant to which securities of the Company or of another corporation are issued with respect to the outstanding shares of
Common Stock, a Participant upon exercising an Option or accepting a Stock Grant after the recapitalization or reorganization shall be
entitled to receive for the price paid upon such exercise or acceptance if any, the number of replacement securities which would have
been received if such Option had been exercised or Stock Grant accepted prior to such recapitalization or reorganization.

 

(d)              
Adjustments to Stock-Based Awards. Upon the happening of any of the events described in Subparagraphs (a), (b) or (c) above,
any outstanding Stock-Based Award shall be appropriately adjusted to reflect the events described in such Subparagraphs. The Administrator
or the Successor Board shall determine the specific adjustments to be made under this Paragraph 25, including, but not limited to the
effect of any, Corporate Transaction and, subject to Paragraph 4, its determination shall be conclusive.

 

(e)              
Termination of Awards upon Consummation of Corporate Transaction. Except as the Administrator may otherwise determine, each
Stock Right will automatically terminate (and in the case of outstanding Shares of restricted Common Stock, will automatically be forfeited)
immediately upon the consummation of a Corporate Transaction, other than (i) any award that is assumed, continued or substituted pursuant
to Paragraph 25(b) above, and (ii) any cash award that by its terms, or as a result of action taken by the Administrator, continues following
the consummation of the Corporate Transaction.

 

    18

     

    

 

26.           ISSUANCES OF SECURITIES.

 

(a)               
Except as expressly provided herein, no issuance by the Company of shares of stock of any class, or securities convertible into
shares of stock of any class, shall affect, and no adjustment by reason thereof shall be made with respect to, the number or price of
shares subject to Stock Rights. Except as expressly provided herein, no adjustments shall be made for dividends paid in cash or in property
(including without limitation, securities) of the Company prior to any issuance of Shares pursuant to a Stock Right.

 

(b)              
The Company will not be obligated to issue any Shares pursuant to the Plan or to remove any restriction from Shares previously
issued under the Plan until: (i) the Company is satisfied that all legal matters in connection with the issuance of such Shares have been
addressed and resolved; (ii) if the outstanding Shares is at the time of issuance listed on any stock exchange or national market system,
the Shares to be issued have been listed or authorized to be listed on such exchange or system upon official notice of issuance; and (iii)
all conditions of the award have been satisfied or waived. The Company may require, as a condition to the exercise of an award or the
issuance of Shares under an award, such representations or agreements as counsel for the Company may consider appropriate to avoid violation
of the Securities Act, as amended, or any applicable state or non-U.S. securities law. Any Shares issued under the Plan will be evidenced
in such manner as the Administrator determines appropriate, including book-entry registration or delivery of stock certificates. In the
event that the Administrator determines that stock certificates will be issued in connection with Shares issued under the Plan, the Administrator
may require that such certificates bear an appropriate legend reflecting any restriction on transfer applicable to such Stock, and the
Company may hold the certificates pending the lapse of the applicable restrictions.

 

27.           FRACTIONAL SHARES. No fractional shares shall be issued under the Plan and the person exercising a Stock Right shall receive
from the Company cash in lieu of such fractional shares equal to the Fair Market Value thereof.

 

28.           WITHHOLDING.
In the event that any federal, state, or local income taxes, employment taxes, Federal Insurance Contributions Act withholdings or other
amounts are required by applicable law or governmental regulation to be withheld from the Participant’s salary, wages or other
remuneration in connection with the issuance of a Stock Right or Shares under the Plan or for any other reason required by law, the Company
may withhold from the Participant’s compensation, if any, or may require that the Participant advance in cash to the Company, or
to any Affiliate of the Company which employs or employed the Participant, the statutory minimum amount of such withholdings unless a
different withholding arrangement, including the use of shares of the Company’s Common Stock or a promissory note, is authorized
by the Administrator (and permitted by law). For purposes hereof, the fair market value of the shares withheld for purposes of payroll
withholding shall be determined in the manner set forth under the definition of Fair Market Value provided in Paragraph 1 above, as of
the most recent practicable date. If the Fair Market Value of the shares withheld is less than the amount of payroll withholdings required,
the Participant may be required to advance the difference in cash to the Company or the Affiliate employer.

 

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29.           TERMINATION OF THE PLAN. The Plan will terminate on July 7, 2031, the date
which is ten years from the earlier of the date of its adoption by the Board of Directors and the date of its approval by the shareholders
of the Company. The Plan may be terminated at an earlier date by vote of the shareholders or the Board of Directors of the Company; provided,
however, that any such earlier termination shall not affect any Agreements executed prior to the effective date of such termination. Termination
of the Plan shall not affect any Stock Rights theretofore granted.

 

30.           AMENDMENT
OF THE PLAN AND AGREEMENTS. The Plan may be amended by the shareholders of the Company. The Plan may also be amended by the Administrator;
provided that any amendment approved by the Administrator which the Administrator determines is of a scope that requires shareholder
approval shall be subject to obtaining such shareholder approval including, without limitation, to the extent necessary to qualify any
or all outstanding Stock Rights granted under the Plan or Stock Rights to be granted under the Plan for favorable federal income tax
treatment as may be afforded ISOs under Section 422 and to the extent necessary to qualify the Shares issuable under the Plan for listing
on any national securities exchange or quotation in any national automated quotation system of securities dealers. Any modification or
amendment of the Plan shall not, without the consent of a Participant, adversely affect such Participant’s rights under a Stock
Right previously granted to such Participant, unless such amendment is required by applicable law or necessary to preserve the economic
value of such Stock Right. With the consent of such Participant affected, the Administrator may amend outstanding Agreements in a manner
which may be adverse to the Participant but which is not inconsistent with the Plan. In the discretion of the Administrator, outstanding
Agreements may be amended by the Administrator in a manner which is not adverse to the Participant. Nothing in this Paragraph 30 shall
limit the Administrator’s authority to take any action permitted pursuant to Paragraph 25.

 

31.           EMPLOYMENT OR OTHER RELATIONSHIP. Nothing in this Plan or any Agreement shall be deemed to prevent the Company or an Affiliate
from terminating the employment, consultancy or director status of a Participant, nor to prevent a Participant from terminating such Participant’s
own employment, consultancy or director status or to give any Participant a right to be retained in employment or other service by the
Company or any Affiliate for any period of time.

 

32.           SECTION
409A AND SECTION 422. The Company intends that the Plan and any Stock Rights granted hereunder be exempt from or comply with Section
409A, to the extent applicable. The Company intends that ISOs comply with Section 422, to the extent applicable. Any ambiguities in the
Plan or any Stock Right shall be construed to effect the intent as described in this Paragraph 32.

 

    20

     

    

 

If a Participant is a “specified
employee” as defined in Section 409A (and as applied according to procedures of the Company and its Affiliates) as of such Participant’s
separation from service, to the extent any payment under this Plan or pursuant to a Stock Right constitutes non-exempt deferred compensation
under Section 409A that is being paid by reason of the separation from service, no payments due under this Plan or pursuant to a Stock
Right may be made until the earlier of: (i) the first day of the seventh month following the Participant’s separation from service,
or (ii) the Participant’s date of death; provided, however, that any payments delayed during this six-month period shall be paid
in the aggregate in a lump sum, without interest, on the first day of the seventh month following the Participant’s separation from
service.

 

The Administrator shall administer
the Plan with a view toward ensuring that Stock Rights under the Plan that are subject to Section 409A or Section 422, as applicable,
comply with the requirements thereof and that Options under the Plan be exempt from the requirements of Section 409A or compliant with
Section 422, as applicable, but neither the Administrator nor any member of the Board of Directors, nor the Company nor any of its Affiliates,
nor any other person acting hereunder on behalf of the Company, the Administrator or the Board of Directors shall be liable to a Participant
or any Survivor by reason of the acceleration of any income, or the imposition of any additional tax or penalty, with respect to a Stock
Right, whether by reason of a failure to satisfy the requirements of Section 409A or Section 422 or otherwise.

 

33.           INDEMNITY. Neither the Board of Directors nor the Administrator, nor any members of either, nor any employees of the Company
or any parent, subsidiary, or other Affiliate, shall be liable for any act, omission, interpretation, construction or determination made
in good faith in connection with their responsibilities with respect to this Plan, and the Company hereby agrees to indemnify the members
of the Board or Directors, the members of the Committee, and the employees of the Company and its parent or subsidiaries in respect of
any claim, loss, damage, or expense (including reasonable counsel fees) arising from any such act, omission, interpretation, construction
or determination to the full extent permitted by law.

 

34.           CLAWBACK.
Notwithstanding anything to the contrary contained in this Plan, the Company may recover from a Participant any compensation received
from any Stock Right (whether or not settled) or cause a Participant to forfeit any Stock Right (whether or not vested) in the event
that the Company’s Clawback Policy as then in effect is triggered.

 

35.           GOVERNING LAW. This Plan shall be construed and enforced in accordance with the law of the State of Delaware.

 

36.           WAIVER OF JURY TRIAL. By accepting or being deemed to have accepted an award under the Plan, each Participant waives (or
will be deemed to have waived), to the maximum extent permitted under applicable law, any right to a trial by jury in any action, proceeding
or counterclaim concerning any rights under the Plan or any award, or under any amendment, waiver, consent, instrument, document or other
agreement delivered or which in the future may be delivered in connection therewith, and agrees (or will be deemed to have agreed) that
any such action, proceedings or counterclaim will be tried before a court and not before a jury. By accepting or being deemed to have
accepted an award under the Plan, each Participant certifies that no officer, representative, or attorney of the Company has represented,
expressly or otherwise, that the Company would not, in the event of any action, proceeding or counterclaim, seek to enforce the foregoing
waivers. Notwithstanding anything to the contrary in the Plan, nothing herein is to be construed as limiting the ability of the Company
and a Participant to agree to submit any dispute arising under the terms of the Plan or any ward to binding arbitration or as limiting
the ability of the Company to require any individual to agree to submit such disputes to binding arbitration as a condition of receiving
an award hereunder.

 

    21

     

    

 

37.           UNFUNDED
OBLIGATIONS. The Company’s obligations under the Plan are unfunded, and no Participant will have any right to specific assets
of the Company in respect of any award under the Plan. Participants will be general unsecured creditors of the Company with respect to
any amounts due or payable under the Plan.

 

    22

     

    

 

  

SERA PROGNOSTICS,
INC.

 

Stock Option Grant Notice

Stock Option Grant under the Company’s

2021 Equity Incentive Plan

  

	1.	Name and Address of Participant:

   

	2.	Date of Option Grant:

 

	3.	Type of Grant:

 

	4. 	Maximum Number of Shares for which this Option is
  exercisable:

 

	5.	Exercise (purchase) price per share:

 

	6.	Option Expiration Date:

 

7.          Vesting
Schedule: This Option shall become exercisable (and the Shares issued upon exercise shall be vested) as follows provided the Participant
is an Employee, director or Consultant of the Company or of an Affiliate on the applicable vesting date:

 

[INSERT VESTING PROVISIONS]

 

The foregoing rights are cumulative
and are subject to the other terms and conditions of this Agreement and the Plan.

 

The Company and the Participant
acknowledge receipt of this Stock Option Grant Notice and agree to the terms of the Stock Option Agreement attached hereto and incorporated
by reference herein, the Company’s 2021 Equity Incentive Plan and the terms of this Option Grant as set forth above.

 

	 	SERA PROGNOSTICS, INC.
	 	 
	 	By:	 
	 	 	Name:       
	 	 	Title:
	 	 
	 	 
	 	Participant

 

    

     

    

 

SERA PROGNOSTICS,
INC. 

 

STOCK OPTION AGREEMENT - INCORPORATED TERMS
AND CONDITIONS

  

AGREEMENT
(this “Agreement”) made as of the date of grant set forth in the Stock Option Grant Notice by and between Sera Prognostics,
Inc. (the “Company”), a Delaware corporation, and the individual whose name appears on the Stock Option Grant Notice (the
 “Participant”).

 

WHEREAS, the Company desires
to grant to the Participant an Option to purchase shares of its class A common stock, $0.0001 par value per share (the “Shares”),
under and for the purposes set forth in the Company’s 2021 Equity Incentive Plan (the “Plan”);

 

WHEREAS, the Company and the
Participant understand and agree that any terms used and not defined herein have the same meanings as in the Plan; and

 

WHEREAS, the Company and the
Participant each intend that the Option granted herein shall be of the type set forth in the Stock Option Grant Notice.

 

NOW, THEREFORE, in consideration
of the mutual covenants hereinafter set forth and for other good and valuable consideration, the parties hereto agree as follows:

 

1.                 
GRANT OF OPTION. The Company hereby grants to the Participant the right and option to purchase all or any part of an aggregate
of the number of Shares set forth in the Stock Option Grant Notice, on the terms and conditions and subject to all the limitations set
forth herein, under United States securities and tax laws, and in the Plan, which is incorporated herein by reference. The Participant
acknowledges receipt of a copy of the Plan.

 

2.                 
EXERCISE PRICE. The exercise price of the Shares covered by the Option shall be the amount per Share set forth in the Stock
Option Grant Notice, subject to adjustment, as provided in the Plan, in the event of a stock split, reverse stock split or other events
affecting the holders of Shares after the date hereof (the “Exercise Price”). Payment shall be made in accordance with Paragraph
10 of the Plan.

 

3.                 
EXERCISABILITY OF OPTION. Subject to the terms and conditions set forth in this Agreement and the Plan, the Option granted
hereby shall become vested and exercisable as set forth in the Stock Option Grant Notice and is subject to the other terms and conditions
of this Agreement and the Plan.

 

4.                 
TERM OF OPTION. This Option shall terminate on the Option Expiration Date as specified in the Stock Option Grant Notice
and, if this Option is designated in the Stock Option Grant Notice as an ISO and the Participant owns as of the date hereof more than
10% of the total combined voting power of all classes of capital stock of the Company or an Affiliate, such date may not be more than
five years from the date of this Agreement, but shall be subject to earlier termination as provided herein or in the Plan.

 

    

     

    

 

If the Participant ceases to
be an Employee, director or Consultant of the Company or of an Affiliate for any reason other than the death or Disability of the Participant,
or termination of the Participant for Cause (the “Termination Date”), the Option to the extent then vested and exercisable
pursuant to Section 3 hereof as of the Termination Date, and not previously terminated in accordance with this Agreement, may be exercised
within three months after the Termination Date, or on or prior to the Option Expiration Date as specified in the Stock Option Grant Notice,
whichever is earlier, but may not be exercised thereafter except as set forth below. In such event, the unvested portion of the Option
shall not be exercisable and shall expire and be cancelled on the Termination Date.

 

If
this Option is designated in the Stock Option Grant Notice as an ISO and the Participant ceases to be an Employee of the Company
or of an Affiliate but continues after termination of employment to provide service to the Company or an Affiliate as a director or Consultant,
this Option shall continue to vest in accordance with Section 3 above as if this Option had not terminated until the Participant is no
longer providing services to the Company. In such case, this Option shall automatically convert and be deemed a Non-Qualified Option as
of the date that is three months from termination of the Participant's employment and this Option shall continue on the same terms and
conditions set forth herein until such Participant is no longer providing service to the Company or an Affiliate.

 

Notwithstanding the foregoing,
in the event of the Participant’s Disability or death within three months after the Termination Date, the Participant or the Participant’s
Survivors may exercise the Option within one year after the Termination Date, but in no event after the Option Expiration Date as specified
in the Stock Option Grant Notice.

 

In the event the Participant’s
service is terminated by the Company or an Affiliate for Cause, the Participant’s right to exercise any unexercised portion of this
Option even if vested shall cease immediately as of the time the Participant is notified his or her service is terminated for Cause, and
this Option shall thereupon terminate. Notwithstanding anything herein to the contrary, if subsequent to the Participant’s termination,
but prior to the exercise of the Option, the Administrator determines that, either prior or subsequent to the Participant’s termination,
the Participant engaged in conduct which would constitute Cause, then the Participant shall immediately cease to have any right to exercise
the Option and this Option shall thereupon terminate.

 

In the event of the Disability
of the Participant, as determined in accordance with the Plan, the Option shall be exercisable within one year after the Participant’s
termination of service due to Disability or, if earlier, on or prior to the Option Expiration Date as specified in the Stock Option Grant
Notice. In such event, the Option shall be exercisable:

 

		(a)	to the extent that the Option has become exercisable but has not been exercised as of the date of the
Participant’s termination of service due to Disability; and

 

    2

     

    

 

		(b)	in the event rights to exercise the Option accrue periodically, to the extent of a pro rata portion through
the date of the Participant’s termination of service due to Disability of any additional vesting rights that would have accrued
on the next vesting date had the Participant not become Disabled. The proration shall be based upon the number of days accrued in the
current vesting period prior to the date of the Participant’s termination of service due to Disability.

 

In the event of the death of
the Participant while an Employee, director or Consultant of the Company or of an Affiliate, the Option shall be exercisable by the Participant’s
Survivors within one year after the date of death of the Participant or, if earlier, on or prior to the Option Expiration Date as specified
in the Stock Option Grant Notice. In such event, the Option shall be exercisable:

 

		(x)	to the extent that the Option has become exercisable but has not been exercised as of the date of death;
and

 

		(y)	in the event rights to exercise the Option accrue periodically, to the extent of a pro rata portion through
the date of death of any additional vesting rights that would have accrued on the next vesting date had the Participant not died. The
proration shall be based upon the number of days accrued in the current vesting period prior to the Participant’s date of death.

 

5.                 
METHOD OF EXERCISING OPTION. Subject to the terms and conditions of this Agreement, the Option may be exercised by written
notice to the Company or its designee, in substantially the form of Exhibit A attached hereto (or in such other form acceptable
to the Company, which may include electronic notice). Such notice shall state the number of Shares with respect to which the Option is
being exercised and shall be signed by the person exercising the Option (which signature may be provided electronically in a form acceptable
to the Company). Payment of the Exercise Price for such Shares shall be made in accordance with Paragraph 10 of the Plan. The Company
shall deliver such Shares as soon as practicable after the notice shall be received, provided, however, that the Company may delay issuance
of such Shares until completion of any action or obtaining of any consent, which the Company deems necessary under any applicable law
(including, without limitation, state securities or “blue sky” laws). The Shares as to which the Option shall have been so
exercised shall be registered in the Company’s share register in the name of the person so exercising the Option (or, if the Option
shall be exercised by the Participant and if the Participant shall so request in the notice exercising the Option, shall be registered
in the Company’s share register in the name of the Participant and another person jointly, with right of survivorship) and shall
be delivered as provided above to or upon the written order of the person exercising the Option. In the event the Option shall be exercised,
pursuant to Section 4 hereof, by any person other than the Participant, such notice shall be accompanied by appropriate proof of the right
of such person to exercise the Option. All Shares that shall be purchased upon the exercise of the Option as provided herein shall be
fully paid and nonassessable.

 

    3

     

    

 

6.                 
PARTIAL EXERCISE. Exercise of this Option to the extent above stated may be made in part at any time and from time to time
within the above limits, except that no fractional share shall be issued pursuant to this Option.

 

7.                 
NON-ASSIGNABILITY. The Option shall not be transferable by the Participant otherwise than by will or by the laws of descent
and distribution. If this Option is a Non-Qualified Option then it may also be transferred pursuant to a qualified domestic relations
order as defined by the Code or Title I of the Employee Retirement Income Security Act or the rules thereunder. Except as provided
above in this paragraph, the Option shall be exercisable, during the Participant’s lifetime, only by the Participant (or, in the
event of legal incapacity or incompetency, by the Participant’s guardian or representative) and shall not be assigned, pledged or
hypothecated in any way (whether by operation of law or otherwise) and shall not be subject to execution, attachment or similar process.
Any attempted transfer, assignment, pledge, hypothecation or other disposition of the Option or of any rights granted hereunder contrary
to the provisions of this Section 7, or the levy of any attachment or similar process upon the Option shall be null and void.

 

8.                 
NO RIGHTS AS STOCKHOLDER UNTIL EXERCISE. The Participant shall have no rights as a stockholder with respect to Shares subject
to this Agreement until registration of the Shares in the Company’s share register in the name of the Participant. Except as is
expressly provided in the Plan with respect to certain changes in the capitalization of the Company, no adjustment shall be made for dividends
or similar rights for which the record date is prior to the date of such registration.

 

9.                 
ADJUSTMENTS. The Plan contains provisions covering the treatment of Options in a number of contingencies such as stock splits
and mergers. Provisions in the Plan for adjustment with respect to stock subject to Options and the related provisions with respect to
successors to the business of the Company are hereby made applicable hereunder and are incorporated herein by reference.

 

10.             
TAXES. The Participant acknowledges and agrees that (i) any income or other taxes due from the Participant with respect
to this Option or the Shares issuable pursuant to this Option shall be the Participant’s responsibility; (ii) the Participant was
free to use professional advisors of his or her choice in connection with this Agreement, has received advice from his or her professional
advisors in connection with this Agreement, understands its meaning and import, and is entering into this Agreement freely and without
coercion or duress; (iii) the Participant has not received and is not relying upon any advice, representations or assurances made by or
on behalf of the Company or any Affiliate or any employee of or counsel to the Company or any Affiliate regarding any tax or other effects
or implications of the Option, the Shares or other matters contemplated by this Agreement; and (iv) neither the Administrator, the Company,
its Affiliates, nor any of its officers or directors, shall be held liable for any applicable costs, taxes, or penalties associated with
the Option if, in fact, the Internal Revenue Service were to determine that the Option constitutes deferred compensation under Section
409A of the Code.

 

    4

     

    

 

If this Option is designated
in the Stock Option Grant Notice as a Non-Qualified Option or if the Option is an ISO and is converted into a Non-Qualified Option and
such Non-Qualified Option is exercised, the Participant agrees that the Company may withhold from the Participant’s remuneration,
if any, the minimum statutory amount of federal, state and local withholding taxes attributable to such amount that is considered compensation
includable in such person’s gross income. At the Company’s discretion, the amount required to be withheld may be withheld
in cash from such remuneration, or in kind from the Shares otherwise deliverable to the Participant on exercise of the Option. The Participant
further agrees that, if the Company does not withhold an amount from the Participant’s remuneration sufficient to satisfy the Company’s
income tax withholding obligation, the Participant will reimburse the Company on demand, in cash, for the amount under-withheld.

 

11.             
PURCHASE FOR INVESTMENT. Unless the offering and sale of the Shares to be issued upon the particular exercise of the Option
shall have been effectively registered under the Securities Act, the Company shall be under no obligation to issue the Shares covered
by such exercise unless the Company has determined that such exercise and issuance would be exempt from the registration requirements
of the Securities Act and until the following conditions have been fulfilled:

 

(a)               
The person(s) who exercise the Option shall warrant to the Company, at the time of such exercise, that such person(s) are acquiring
such Shares for their own respective accounts, for investment, and not with a view to, or for sale in connection with, the distribution
of any such Shares, in which event the person(s) acquiring such Shares shall be bound by the provisions of the following legend which
shall be endorsed upon any certificate(s) evidencing the Shares issued pursuant to such exercise:

 

“The shares represented by this
certificate have been taken for investment and they may not be sold or otherwise transferred by any person, including a pledgee, unless
(1) either (a) a Registration Statement with respect to such shares shall be effective under the Securities Act of 1933, as amended, or
(b) the Company shall have received an opinion of counsel satisfactory to it that an exemption from registration under such Act is then
available, and (2) there shall have been compliance with all applicable state securities laws;” and

 

(b)              
If the Company so requires, the Company shall have received an opinion of its counsel that the Shares may be issued upon such particular
exercise in compliance with the Securities Act without registration thereunder. Without limiting the generality of the foregoing, the
Company may delay issuance of the Shares until completion of any action or obtaining of any consent, which the Company deems necessary
or advisable (including without limitation state securities or “blue sky” laws).

 

    5

     

    

 

12.             
RESTRICTIONS ON TRANSFER OF SHARES.

 

(a)               
The Participant agrees that in the event the Company proposes to offer for sale to the public any of its equity securities and
such Participant is requested by the Company and any underwriter engaged by the Company in connection with such offering to sign an agreement
restricting the sale or other transfer of Shares, then it will promptly sign such agreement and will not transfer, whether in privately
negotiated transactions or to the public in open market transactions or otherwise, any Shares or other securities of the Company held
by him or her during such period as is determined by the Company and the underwriters, not to exceed 180 days following the closing of
the offering, plus such additional period of time as may be required to comply with FINRA rules or similar rules thereto promulgated by
another regulatory authority (such period, the “Lock-Up Period”). Such agreement shall be in writing and in form and substance
reasonably satisfactory to the Company and such underwriter and pursuant to customary and prevailing terms and conditions. Notwithstanding
whether the Participant has signed such an agreement, the Company may impose stop-transfer instructions with respect to the Shares or
other securities of the Company subject to the foregoing restrictions until the end of the Lock-Up Period.

 

(b)              
The Participant acknowledges and agrees that neither the Company, its stockholders nor its directors and officers, has any duty
or obligation to disclose to the Participant any material information regarding the business of the Company or affecting the value of
the Shares before, at the time of, or following a termination of the service of the Participant by the Company, including, without limitation,
any information concerning plans for the Company to make a public offering of its securities or to be acquired by or merged with or into
another firm or entity.

 

13.             
NO OBLIGATION TO MAINTAIN RELATIONSHIP. The Participant acknowledges that: (i) the Company is not by the Plan or this Option
obligated to continue the Participant as an employee, director or Consultant of the Company or an Affiliate; (ii) the Plan is discretionary
in nature and may be suspended or terminated by the Company at any time; (iii) the grant of the Option is a one-time benefit which does
not create any contractual or other right to receive future grants of options, or benefits in lieu of options; (iv) all determinations
with respect to any such future grants, including, but not limited to, the times when options shall be granted, the number of shares subject
to each option, the option price, and the time or times when each option shall be exercisable, will be at the sole discretion of the Company;
(v) the Participant’s participation in the Plan is voluntary; (vi) the value of the Option is an extraordinary item of compensation
which is outside the scope of the Participant’s employment or consulting contract, if any; and (vii) the Option is not part of normal
or expected compensation for purposes of calculating any severance, resignation, redundancy, end of service payments, bonuses, long-service
awards, pension or retirement benefits or similar payments.

 

14.             
IF OPTION IS INTENDED TO BE AN ISO. If this Option is designated in the Stock Option Grant Notice as an ISO so that the
Participant (or the Participant’s Survivors) may qualify for the favorable tax treatment provided to holders of Options that meet
the standards of Section 422 of the Code then any provision of this Agreement or the Plan which conflicts with the Code so that this Option
would not be deemed an ISO is null and void and any ambiguities shall be resolved so that the Option qualifies as an ISO. The Participant
should consult with the Participant’s own tax advisors regarding the tax effects of the Option and the requirements necessary to
obtain favorable tax treatment under Section 422 of the Code, including, but not limited to, holding period requirements.

 

    6

     

    

 

Notwithstanding
the foregoing, to the extent that the Option is designated in the Stock Option Grant Notice as an ISO and
is not deemed to be an ISO pursuant to Section 422(d) of the Code because the aggregate Fair Market Value (determined as of the Date
of Option Grant) of any of the Shares with respect to which this ISO is granted becomes exercisable for the first time during any calendar
year in excess of $100,000, the portion of the Option representing such excess value shall be treated as a Non-Qualified Option and the
Participant shall be deemed to have taxable income measured by the difference between the then Fair Market Value of the Shares received
upon exercise and the price paid for such Shares pursuant to this Agreement. 

 

Neither the Company nor any
Affiliate shall have any liability to the Participant, or any other party, if the Option (or any part thereof) that is intended to be
an ISO is not an ISO or for any action taken by the Administrator, including without limitation the conversion of an ISO to a Non-Qualified
Option.

 

15.             
NOTICE TO COMPANY OF DISQUALIFYING DISPOSITION OF AN ISO. If this Option is designated in the Stock Option Grant Notice
as an ISO then the Participant agrees to notify the Company in writing immediately after the Participant makes a Disqualifying Disposition
of any of the Shares acquired pursuant to the exercise of the ISO. A Disqualifying Disposition is defined in Section 424(c) of the Code
and includes any disposition (including any sale) of such Shares before the later of (a) two years after the date the Participant was
granted the ISO or (b) one year after the date the Participant acquired Shares by exercising the ISO, except as otherwise provided in
Section 424(c) of the Code. If the Participant has died before the Shares are sold, these holding period requirements do not apply and
no Disqualifying Disposition can occur thereafter.

 

16.             
NOTICES. Any notices required or permitted by the terms of this Agreement or the Plan shall be given by recognized courier
service, facsimile, registered or certified mail, return receipt requested, addressed as follows:

 

If to the Company:

 

Sera Prognostics, Inc.

2749 East Parleys Way Suite 200

Salt Lake City, UT 84109

Attention: President

 

If to the Participant at the address set forth
on the Stock Option Grant Notice or to such other address or addresses of which notice in the same manner has previously been given. Any
such notice shall be deemed to have been given upon the earlier of receipt, one business day following delivery to a recognized courier
service or three business days following mailing by registered or certified mail.

 

    7

     

    

 

17.             
GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the laws of the State of Delaware,
without giving effect to the conflict of law principles thereof. For the purpose of litigating any dispute that arises under this Agreement,
the parties hereby consent to exclusive jurisdiction in Delaware and agree that such litigation shall be conducted in the state courts
of Delaware or the federal courts of the United States for the District of Delaware.

 

18.             
BENEFIT OF AGREEMENT. Subject to the provisions of the Plan and the other provisions hereof, this Agreement shall be for
the benefit of and shall be binding upon the heirs, executors, administrators, successors and assigns of the parties hereto.

 

19.             
ENTIRE AGREEMENT. This Agreement, together with the Plan, embodies the entire agreement and understanding between the parties
hereto with respect to the subject matter hereof and supersedes all prior oral or written agreements and understandings relating to the
subject matter hereof (with the exception of acceleration of vesting provisions contained in any other agreement with the Company). No
statement, representation, warranty, covenant or agreement not expressly set forth in this Agreement shall affect or be used to interpret,
change or restrict, the express terms and provisions of this Agreement. Notwithstanding the foregoing in all events, this Agreement shall
be subject to and governed by the Plan.

 

20.             
MODIFICATIONS AND AMENDMENTS. The terms and provisions of this Agreement may be modified or amended as provided in the Plan.

 

21.             
WAIVERS AND CONSENTS. Except as provided in the Plan, 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.

 

22.             
DATA PRIVACY. By entering into this Agreement, the Participant: (i) authorizes the Company and each Affiliate, and any agent
of the Company or any Affiliate administering the Plan or providing Plan recordkeeping services, to disclose to the Company or any of
its Affiliates such information and data as the Company or any such Affiliate shall request in order to facilitate the grant of options
and the administration of the Plan; (ii) to the extent permitted by applicable law waives any data privacy rights he or she may have with
respect to such information, and (iii) authorizes the Company and each Affiliate to store and transmit such information in electronic
form for the purposes set forth in this Agreement.

 

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    8

     

    

 

Exhibit A

 

NOTICE OF EXERCISE OF STOCK OPTION

 

Form for Shares registered in the United
States

 

	To:	Sera Prognostics, Inc.

 

IMPORTANT NOTICE: This form of Notice of Exercise may only be used
at such time as the Company has filed a Registration Statement with the Securities and Exchange Commission under which the issuance of
the Shares for which this exercise is being made is registered and such Registration Statement remains effective.

 

Ladies and Gentlemen:

 

I hereby exercise my Stock
Option to purchase _________ shares (the “Shares”) of the class A common stock, $0.0001 par value, of Sera Prognostics, Inc.
(the “Company”), at the exercise price of $________ per share, pursuant to and subject to the terms of that Stock Option Grant
Notice dated _______________, 20__.

 

I understand the nature of
the investment I am making and the financial risks thereof. I am aware that it is my responsibility to have consulted with competent tax
and legal advisors about the relevant national, state and local income tax and securities laws affecting the exercise of the Option and
the purchase and subsequent sale of the Shares.

 

I am paying the option exercise
price for the Shares as follows:

 

_________________________________________

 

Please issue the Shares (check one):

 

 ̈ to me; or

 

 ̈ to me and ____________________________,
as joint tenants with right of survivorship,

 

at the following address:

 

	 	 	 
	 	 	 
	 	 	 

 

    Exhibit A-1

     

    

  

My mailing address for stockholder
communications, if different from the address listed above, is:

 

	 	 	 
	 	 	 
	 	 	 

  

	 	Very truly yours,
	 	  
	 	 
	 	Participant (signature)
	 	  
	 	 
	 	Print Name
	 	  
	 	 
	 	Date

 

    Exhibit A-2

     

    

 

 

SERA PROGNOSTICS, INC.

 

Restricted Stock Unit Award Grant Notice

Restricted Stock Unit Award Grant under the Company’s

2021 Equity Incentive Plan

 

		1.	Name and Address of Participant:

 

		2.	Date of Grant of 

Restricted Stock Unit Award:

 

		3.	Maximum Number of Shares underlying

Restricted Stock Unit Award:

 

		4.	Vesting of Award: This Restricted Stock Unit Award shall vest as follows provided the Participant is an
Employee, director or Consultant of the Company or of an Affiliate on the applicable vesting:

 

	Number of Restricted Stock Units	Vesting Date

 

[INSERT VESTING PROVISIONS]

 

The Company and the Participant
acknowledge receipt of this Restricted Stock Unit Award Grant Notice and agree to the terms of the Restricted Stock Unit Agreement attached
hereto and incorporated by reference herein, the Company’s 2021 Equity Incentive Plan and the terms of this Restricted Stock Unit
Award as set forth above.

 

	 	SERA PROGNOSTICS, INC.
	 	 	 
	 	By:	 
	 	 	Name:
	 	 	Title:

		 
	 	 
	 	Participant

 

     

     

    

 

SERA PROGNOSTICS, INC.

 

RESTRICTED STOCK UNIT AGREEMENT –

 

INCORPORATED TERMS AND CONDITIONS

 

AGREEMENT
made as of the date of grant set forth in the Restricted Stock Unit Award Grant Notice between Sera Prognostics, Inc. (the “Company”),
a Delaware corporation, and the individual whose name appears on the Restricted Stock Unit Award Grant Notice (the “Participant”).

 

WHEREAS, the Company has adopted
the 2021 Equity Incentive Plan (the “Plan”), to promote the interests of the Company by providing an incentive for Employees,
directors and Consultants of the Company and its Affiliates;

 

WHEREAS, pursuant to the provisions
of the Plan, the Company desires to grant to the Participant restricted stock units (“RSUs”) related to the Company’s
class A common stock, $0.0001 par value per share (“Common Stock”), in accordance with the provisions of the Plan, all on
the terms and conditions hereinafter set forth; and

 

WHEREAS, the Company and the
Participant understand and agree that any terms used and not defined herein have the meanings ascribed to such terms in the Plan.

 

NOW, THEREFORE, in consideration
of the promises and the mutual covenants contained herein and for other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, the parties hereto hereby agree as follows:

 

1.               
Grant of Award. The Company hereby grants to the Participant an award for the number of RSUs set forth in the Restricted
Stock Unit Award Grant Notice (the “Award”). Each RSU represents a contingent entitlement of the Participant to receive one
share of Common Stock, on the terms and conditions and subject to all the limitations set forth herein and in the Plan, which is incorporated
herein by reference. The Participant acknowledges receipt of a copy of the Plan.

 

2.              
Vesting of Award.

 

(a)               
Subject to the terms and conditions set forth in this Agreement and the Plan, the Award granted hereby shall vest as set forth
in the Restricted Stock Unit Award Grant Notice and is subject to the other terms and conditions of this Agreement and the Plan. On each
vesting date set forth in the Restricted Stock Unit Award Grant Notice, the Participant shall be entitled to receive such number of shares
of Common Stock equivalent to the number of RSUs as set forth in the Restricted Stock Unit Award Grant Notice provided that the Participant
is providing service to the Company or an Affiliate on such vesting date. Such shares of Common Stock shall thereafter be delivered by
the Company to the Participant within five days of the applicable vesting date and in accordance with this Agreement and the Plan.

 

     

     

    

 

(b)              
Except as otherwise set forth in this Agreement, if the Participant ceases to be providing services for any reason by the Company
or by an Affiliate (the “Termination”) prior to a vesting date set forth in the Restricted Stock Unit Award Grant Notice,
then as of the date on which the Participant’s employment or service terminates, all unvested RSUs shall immediately be forfeited
to the Company and this Agreement shall terminate and be of no further force or effect.

 

3.               
Prohibitions on Transfer and Sale. This Award (including any additional RSUs received by the Participant as a result of
stock dividends, stock splits or any other similar transaction affecting the Company’s securities without receipt of consideration)
shall not be transferable by the Participant otherwise than (i) by will or by the laws of descent and distribution, or (ii) pursuant to
a qualified domestic relations order as defined by the Internal Revenue Code or Title I of the Employee Retirement Income Security Act
or the rules thereunder. Except as provided in the previous sentence, the shares of Common Stock to be issued pursuant to this Agreement
shall be issued, during the Participant’s lifetime, only to the Participant (or, in the event of legal incapacity or incompetence,
to the Participant’s guardian or representative). This Award shall not be assigned, pledged or hypothecated in any way (whether
by operation of law or otherwise) and shall not be subject to execution, attachment or similar process. Any attempted transfer, assignment,
pledge, hypothecation or other disposition of this Award or of any rights granted hereunder contrary to the provisions of this Section
3, or the levy of any attachment or similar process upon this Award shall be null and void.

 

4.               
Adjustments. The Plan contains provisions covering the treatment of RSUs and shares of Common Stock in a number of contingencies
such as stock splits. Provisions in the Plan for adjustment with respect to this Award and the related provisions with respect to successors
to the business of the Company are hereby made applicable hereunder and are incorporated herein by reference.

 

5.               
Securities Law Compliance. The Participant specifically acknowledges and agrees that any sales of shares of Common Stock
shall be made in accordance with the requirements of the Securities Act of 1933, as amended. The Company currently has an effective registration
statement on file with the Securities and Exchange Commission with respect to the Common Stock to be granted hereunder. The Company intends
to maintain this registration statement but has no obligation to do so. If the registration statement ceases to be effective for any reason,
Participant will not be able to transfer or sell any of the shares of Common Stock issued to the Participant pursuant to this Agreement
unless exemptions from registration or filings under applicable securities laws are available. Furthermore, despite registration, applicable
securities laws may restrict the ability of the Participant to sell his or her Common Stock, including due to the Participant’s
affiliation with the Company. The Company shall not be obligated to either issue the Common Stock or permit the resale of any shares of
Common Stock if such issuance or resale would violate any applicable securities law, rule or regulation.

 

6.               
Rights as a Stockholder. The Participant shall have no right as a stockholder, including voting and dividend rights, with
respect to the RSUs subject to this Agreement.

 

    2 

     

    

 

7.               
Incorporation of the Plan. The Participant specifically understands and agrees that the RSUs and the shares of Common Stock
to be issued under the Plan will be issued to the Participant pursuant to the Plan, a copy of which Plan the Participant acknowledges
he or she has read and understands and by which Plan he or she agrees to be bound. The provisions of the Plan are incorporated herein
by reference.

 

8.              
Tax Liability of the Participant and Payment of Taxes. The Participant acknowledges and agrees that any income or other
taxes due from the Participant with respect to this Award or the shares of Common Stock to be issued pursuant to this Agreement or otherwise
sold shall be the Participant’s responsibility. Without limiting the foregoing, the Participant agrees that if under applicable
law the Participant will owe taxes at each vesting date on the portion of the Award then vested the Company shall be entitled to immediate
payment from the Participant of the amount of any tax or other amounts required to be withheld by the Company by applicable law or regulation.
Any taxes or other amounts due shall be paid, at the option of the Administrator as follows:

 

(a)               
through reducing the number of shares of Common Stock entitled to be issued to the Participant on the applicable vesting date in
an amount equal to the statutory minimum of the Participant’s total tax and other withholding obligations due and payable by the
Company. Fractional shares will not be retained to satisfy any portion of the Company’s withholding obligation. Accordingly, the
Participant agrees that in the event that the amount of withholding required would result in a fraction of a share being owed, that amount
will be satisfied by withholding the fractional amount from the Participant’s paycheck;

 

(b)              
requiring the Participant to deposit with the Company an amount of cash equal to the amount determined by the Company to be required
to be withheld with respect to the statutory minimum amount of the Participant’s total tax and other withholding obligations due
and payable by the Company or otherwise withholding from the Participant’s paycheck an amount equal to such amounts due and payable
by the Company; or

 

(c)               
if the Company believes that the sale of shares can be made in compliance with applicable securities laws, authorizing, at a time
when the Participant is not in possession of material nonpublic information, the sale by the Participant on the applicable vesting date
of such number of shares of Common Stock as the Company instructs a registered broker to sell to satisfy the Company’s withholding
obligation, after deduction of the broker’s commission, and the broker shall be required to remit to the Company the cash necessary
in order for the Company to satisfy its withholding obligation. To the extent the proceeds of such sale exceed the Company’s withholding
obligation the Company agrees to pay such excess cash to the Participant as soon as practicable. In addition, if such sale is not sufficient
to pay the Company’s withholding obligation the Participant agrees to pay to the Company as soon as practicable, including through
additional payroll withholding, the amount of any withholding obligation that is not satisfied by the sale of shares of Common Stock.
The Participant agrees to hold the Company and the broker harmless from all costs, damages or expenses relating to any such sale. The
Participant acknowledges that the Company and the broker are under no obligation to arrange for such sale at any particular price. In
connection with such sale of shares of Common Stock, the Participant shall execute any such documents requested by the broker in order
to effectuate the sale of shares of Common Stock and payment of the withholding obligation to the Company. The Participant acknowledges
that this paragraph is intended to comply with Section 10b5-1(c)(1)(i)(B) under the Exchange Act.

 

    3 

     

    

 

[It is the Company’s
intention that the Participant’s tax obligations under this Section 8 shall be satisfied through the procedure of Subsection (c)
above, unless the Company provides notice of an alternate procedure under this Section, in its discretion.] The Company shall not deliver
any shares of Common Stock to the Participant until it is satisfied that all required withholdings have been made.

 

9.               
Participant Acknowledgements and Authorizations.

 

The Participant acknowledges the following:

 

(a)               
The Company is not by the Plan or this Award obligated to continue the Participant as an employee, director or consultant of the
Company or an Affiliate.

 

(b)              
The Plan is discretionary in nature and may be suspended or terminated by the Company at any time.

 

(c)               
The grant of this Award is considered a one-time benefit and does not create a contractual or other right to receive any other
award under the Plan, benefits in lieu of awards or any other benefits in the future.

 

(d)              
The Plan is a voluntary program of the Company and future awards, if any, will be at the sole discretion of the Company, including,
but not limited to, the timing of any grant, the amount of any award, vesting provisions and the purchase price, if any.

 

(e)              
The value of this Award is an extraordinary item of compensation outside of the scope of the Participant’s employment or
consulting contract, if any. As such the Award is not part of normal or expected compensation for purposes of calculating any severance,
resignation, redundancy, end of service payments, bonuses, long-service awards, pension or retirement benefits or similar payments. The
future value of the shares of Common Stock is unknown and cannot be predicted with certainty.

 

(f)                
The Participant (i) authorizes the Company and each Affiliate and any agent of the Company or any Affiliate administering the Plan
or providing Plan recordkeeping services, to disclose to the Company or any of its Affiliates such information and data as the Company
or any such Affiliate shall request in order to facilitate the grant of the Award and the administration of the Plan; and (ii) authorizes
the Company and each Affiliate to store and transmit such information in electronic form for the purposes set forth in this Agreement.

 

    4 

     

    

 

10.             
Notices. Any notices required or permitted by the terms of this Agreement or the Plan shall be given by recognized courier
service, facsimile, registered or certified mail, return receipt requested, addressed as follows:

 

If to the Company:

 

Sera Prognostics, Inc.

2749 East Parleys Way Suite 200

Salt Lake City, UT 84109

Attention: President

 

If to the Participant at the
address set forth on the Restricted Stock Unit Award Grant Notice or to such other address or addresses of which notice in the same manner
has previously been given. Any such notice shall be deemed to have been given on the earliest of receipt, one business day following delivery
by the sender to a recognized courier service, or three business days following mailing by registered or certified mail.

 

11.             
Assignment and Successors.

 

(a)               
This Agreement is personal to the Participant and without the prior written consent of the Company shall not be assignable by the
Participant otherwise than by will or the laws of descent and distribution. This Agreement shall inure to the benefit of and be enforceable
by the Participant’s legal representatives.

 

(b)              
This Agreement shall inure to the benefit of and be binding upon the Company and its successors and assigns.

 

12.             
Governing Law. This Agreement shall be construed and enforced in accordance with the laws of the State of Delaware, without
giving effect to the conflict of law principles thereof. For the purpose of litigating any dispute that arises under this Agreement, whether
at law or in equity, the parties hereby consent to exclusive jurisdiction in Delaware and agree that such litigation will be conducted
in the state courts of Delaware or the federal courts of the United States for the District of Delaware.

 

13.             
Severability. If any provision of this Agreement is held to be invalid or unenforceable by a court of competent jurisdiction,
then such provision or provisions shall be modified to the extent necessary to make such provision valid and enforceable, and to the extent
that this is impossible, then such provision shall be deemed to be excised from this Agreement, and the validity, legality and enforceability
of the rest of this Agreement shall not be affected thereby.

 

14.             
Entire Agreement. This Agreement, together with the Plan, constitutes the entire agreement and understanding between the
parties hereto with respect to the subject matter hereof and supersedes all prior oral or written agreements and understandings relating
to the subject matter hereof. No statement, representation, warranty, covenant or agreement not expressly set forth in this Agreement
shall affect or be used to interpret, change or restrict the express terms and provisions of this Agreement provided, however, in any
event, this Agreement shall be subject to and governed by the Plan.

 

    5 

     

    

 

15.             
Modifications and Amendments; Waivers and Consents. The terms and provisions of this Agreement may be modified or amended
as provided in the Plan. Except as provided in the Plan, 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.

 

16.             
Section 409A. The Award of RSUs evidenced by this Agreement is intended to be exempt from the nonqualified deferred compensation
rules of Section 409A of the Code as a “short term deferral” (as that term is used in the final regulations and other guidance
issued under Section 409A of the Code, including Treasury Regulation Section 1.409A-1(b)(4)(i)), and shall be construed accordingly.

 

17.             
Data Privacy. By entering into this Agreement, the Participant: (i) authorizes the Company and each Affiliate, and any agent
of the Company or any Affiliate administering the Plan or providing Plan recordkeeping services, to disclose to the Company or any of
its Affiliates such information and data as the Company or any such Affiliate shall request in order to facilitate the grant of options
and the administration of the Plan; (ii) to the extent permitted by applicable law waives any data privacy rights he or she may have with
respect to such information, and (iii) authorizes the Company and each Affiliate to store and transmit such information in electronic
form for the purposes set forth in this Agreement.

 

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    6

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