Sera Prognostics (SERA) CEO sells 25,612 shares for tax withholding

Rhea-AI Filing Summary

Sera Prognostics, Inc. Chief Executive Officer Zhenya Lindgardt reported selling a total of 25,612 shares of Class A common stock in two open-market transactions on March 10 and March 11, 2026 at weighted average prices of $1.90 and $2.04 per share.

According to the disclosure, these sales were mandated "sell to cover" transactions to satisfy tax withholding obligations from vesting restricted stock units, and are not discretionary trades. After the transactions, Lindgardt directly holds 738,314 shares. The trades were executed as block trades within disclosed price ranges.

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

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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^*

Lindgardt Zhenya

(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
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/10/2026

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	03/10/2026		S		22,639(1)	D	$1.9(2)	741,287	D
Class A Common Stock	03/11/2026		S		2,973(1)	D	$2.04(3)	738,314	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. Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units ("RSUs"). The sale is mandated by the Issuer's election to require the satisfaction of tax withholding obligations to be funded by "sell to cover" transactions and does not represent a discretionary transaction by the Reporting Person.

2. The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $1.77 to $2.36, 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 with regard to the block trade.

3. The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $1.90 to $2.30, 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 with regard to the block trade.

	/s/ Benjamin G. Jackson, Attorney-in-fact	03/12/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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FAQ

What insider transaction did SERA Prognostics (SERA) disclose on this Form 4?

Sera Prognostics reported CEO Zhenya Lindgardt selling 25,612 shares of Class A common stock in two block trades. The weighted average prices were $1.90 and $2.04 per share, and the sales were tied to restricted stock unit tax withholding.

Why did SERA CEO Zhenya Lindgardt sell 25,612 shares of SERA stock?

The shares were sold to cover tax withholding obligations from vesting restricted stock units. The company elected to satisfy these tax obligations through mandatory “sell to cover” transactions, so the sales are characterized as non-discretionary for the reporting person.

How many SERA shares does the CEO hold after the reported Form 4 sales?

After the reported transactions, CEO Zhenya Lindgardt directly holds 738,314 shares of Sera Prognostics Class A common stock. This post-transaction ownership reflects the remaining position after selling 25,612 shares to satisfy tax withholding obligations related to restricted stock unit vesting.

At what prices were the SERA shares sold in the CEO’s Form 4 filing?

The filing reports weighted average sales prices of $1.90 and $2.04 per share. Footnotes explain these were block trades executed in multiple transactions within price ranges of $1.77–$2.36 and $1.90–$2.30, with detailed breakdowns available on request.

Are the insider SERA share sales by the CEO considered discretionary trades?

The filing states these sales are not discretionary trades by the CEO. They were mandated “sell to cover” transactions required by the company’s tax withholding election for vesting restricted stock units, rather than voluntary open-market sales for portfolio or valuation reasons.