SERA director sells 1,560 shares under 10b5-1 plan

SERA PROGNOSTICS, INC. director Sandra AJ Lawrence reported an open-market sale of 1,560 shares of Class A common stock at a weighted average price of $1.95 per share.

Rhea-AI Filing Summary

SERA PROGNOSTICS, INC. director Sandra AJ Lawrence reported an open-market sale of 1,560 shares of Class A common stock at a weighted average price of $1.95 per share. The sale was made under a Rule 10b5-1 trading plan adopted on June 10, 2025. After this transaction, she directly holds 18,033 shares.

Insider Trade Summary

Net Seller: 1,560 shares

Net Sell 1 txn

Insider Lawrence Sandra AJ

Role Director

Sold 1,560 shs ($3K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	1,560	$1.95	$3K

Holdings After Transaction: Class A Common Stock — 18,033 shares (Direct)

Footnotes (2)

1. F1. The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 10, 2025.
2. F2. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.90 to $2.00, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price.

FAQ

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

What insider transaction did SERA director Sandra AJ Lawrence report?

Sandra AJ Lawrence reported selling 1,560 shares of SERA Class A common stock. The sale was an open-market transaction at a weighted average price of $1.95 per share, leaving her with 18,033 directly held shares after the trade.

At what price did Sandra AJ Lawrence sell SERA shares?

The weighted average sale price was $1.95 per share. According to the disclosure, shares were sold in multiple transactions at prices ranging from $1.90 to $2.00, and detailed price breakdowns are available from the reporting person upon request.

How many SERA shares does Sandra AJ Lawrence own after this Form 4 sale?

After selling 1,560 shares, Sandra AJ Lawrence directly holds 18,033 shares of SERA Class A common stock. The filing classifies her ownership as direct, reflecting her share balance immediately following the reported transaction.

Was the SERA insider sale made under a Rule 10b5-1 trading plan?

Yes. The reported transaction was effected under a Rule 10b5-1 trading plan adopted by Sandra AJ Lawrence on June 10, 2025. Such plans allow pre-arranged trading based on predetermined instructions, helping separate trading decisions from later market information.

How many SERA shares in total did Sandra AJ Lawrence sell in this transaction?

She sold 1,560 shares of Class A common stock. The filing notes this as a single reported transaction code “S” for a sale in the open market or a private transaction, with a net reduction of 1,560 shares in her direct holdings.

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

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Accepted by SEC EDGAR 03/06/2026 - 07:25 PM EST 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).

X

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^*

Lawrence Sandra AJ

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
03/06/2026

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	03/06/2026		S(1)		1,560	D	$1.95(2)	18,033	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

Explanation of Responses:

1. The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 10, 2025.

2. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.90 to $2.00, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price.

	/s/ Benjamin G. Jackson, Attorney-in-fact	03/06/2026
	** 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.