Sera Prognostics grants RSUs and options to counsel

Sera Prognostics, Inc. reported that its General Counsel, Benjamin Jackson, received new equity compensation awards.

Rhea-AI Filing Summary

Sera Prognostics, Inc. reported that its General Counsel, Benjamin Jackson, received new equity compensation awards. He was granted 44,215 shares of Class A common stock, represented by restricted stock units, and 68,550 stock options with an exercise price of $1.9900 per share.

The RSUs vest over four years, with 1/16 of the original grant vesting in quarterly installments starting on March 10, 2026, contingent on continued service. The stock options also vest over four years, with 1/48 of the grant vesting in monthly installments beginning on March 10, 2026. Following these awards, Jackson directly holds 158,935 shares of Class A common stock and 68,550 stock options.

Insider Trade Summary

Grant/Award: 112,765 shares

Grant/Award 2 txns

Insider Jackson Benjamin

Role General Counsel

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (right to buy)	68,550	$0.00	$0.00
Grant/Award	Class A Common Stock	44,215	$0.00	$0.00

Holdings After Transaction: Stock Option (right to buy) — 68,550 contracts (Direct); Class A Common Stock — 158,935 shares (Direct)

Footnotes (2)

1. F1. Each share is represented by a restricted stock unit ("RSU"). These RSUs vest over four years as follows: 1/16 of the original grant amount vests in quarterly installments for four years following the vesting commencement date, which is March 10, 2026, subject to the Reporting Person continuing to provide services to the issuer.
2. F2. These stock options vest over four years as follows: 1/48 of the original grant amount vests in monthly installments for four years following the vesting commencement date, which is March 10, 2026, subject to the Reporting Person continuing to provide services to the issuer.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did SERA General Counsel Benjamin Jackson report?

Benjamin Jackson reported two equity grants: 44,215 Class A common shares via RSUs and 68,550 stock options. Both awards were granted at $0.0000 cost as compensation and are subject to multi-year vesting tied to his continued service.

How many SERA stock options were granted to Benjamin Jackson and at what price?

Benjamin Jackson received 68,550 stock options with an exercise price of $1.9900 per share. These options vest in 1/48 monthly installments over four years starting on March 10, 2026, assuming he continues providing services to Sera Prognostics.

What are the vesting terms of Benjamin Jackson’s RSU grant at SERA?

Jackson’s 44,215-share RSU award vests over four years. Specifically, 1/16 of the original grant vests in quarterly installments beginning on March 10, 2026, provided he continues to provide services to Sera Prognostics throughout the vesting period.

What are Benjamin Jackson’s SERA share holdings after these Form 4 transactions?

After the reported grants, Benjamin Jackson directly holds 158,935 shares of Sera Prognostics Class A common stock. He also holds 68,550 stock options, all from the newly granted option award, which are subject to four-year monthly vesting beginning in March 2026.

Do the reported SERA transactions reflect open-market buying or selling?

The transactions reflect compensation-related grants, not open-market trades. Both the RSUs and stock options were coded as “A” for grant or award acquisitions, with a transaction price of $0.0000 per share, indicating no market purchase or sale occurred.

When do Benjamin Jackson’s SERA equity awards start vesting?

Both awards start vesting on March 10, 2026. RSUs vest quarterly, with 1/16 of the original grant each quarter, while stock options vest monthly, with 1/48 of the grant each month, all conditioned on continued service to Sera Prognostics.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/13/2026 - 06:28 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Jackson Benjamin

(Last) (First) (Middle)

C/O SERA PROGNOSTICS, INC.

2749 EAST PARLEYS WAY, SUITE 200

(Street)

SALT LAKE CITY UT 84109

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
SERA PROGNOSTICS, INC. [ SERA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	General Counsel

3. Date of Earliest Transaction (Month/Day/Year)
03/12/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	03/12/2026		A		44,215(1)	A	$0	158,935	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	$1.99	03/12/2026		A		68,550		(2)	03/12/2036	Class A Common Stock	68,550	$0	68,550	D

Explanation of Responses:

1. Each share is represented by a restricted stock unit ("RSU"). These RSUs vest over four years as follows: 1/16 of the original grant amount vests in quarterly installments for four years following the vesting commencement date, which is March 10, 2026, subject to the Reporting Person continuing to provide services to the issuer.

2. These stock options vest over four years as follows: 1/48 of the original grant amount vests in monthly installments for four years following the vesting commencement date, which is March 10, 2026, subject to the Reporting Person continuing to provide services to the issuer.

	/s/ Benjamin G. Jackson	03/13/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.