SERA (NASDAQ: SERA) CIO files Form 4 showing no insider trades

Rhea-AI Filing Summary

SERA PROGNOSTICS, INC. executive Harrison Robert Gardner, the Chief Information Officer, filed a Form 4 insider report. The provided data shows no reported purchases, sales, gifts, exercises, or other share transactions, and no derivative positions or holdings are listed in this filing.

Key Figures

Buy transactions: 0 Sell transactions: 0 Net shares bought/sold: 0 shares +2 more

5 metrics

Buy transactions 0 Form 4 transaction summary buyCount

Sell transactions 0 Form 4 transaction summary sellCount

Net shares bought/sold 0 shares Form 4 transaction summary netBuySellShares

Derivative transactions 0 Form 4 derivativeTransactionCount

Holding entries 0 Form 4 holdingEntries

Key Terms

Form 4, reporting person, Chief Information Officer, derivative positions

4 terms

Form 4 regulatory

"filed a Form 4 insider report"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

reporting person regulatory

"lists Harrison Robert Gardner as the reporting person"

Chief Information Officer financial

"Harrison Robert Gardner, the Chief Information Officer"

A chief information officer (CIO) is a senior executive responsible for managing a company's technology and information systems. They ensure that technology supports the organization’s goals, much like a conductor coordinating an orchestra to create harmonious music. Investors care about CIOs because their decisions and strategies can influence a company's efficiency, security, and ability to adapt to new digital opportunities.

derivative positions financial

"no derivative positions or holdings are listed"

Derivative positions are contracts that derive their value from an underlying asset—such as a stock, bond, currency or commodity—and include instruments like options, futures and swaps. Think of them as bets or insurance tied to an asset’s future price: they let investors amplify returns, hedge risk or take exposure without owning the asset directly, which can meaningfully increase potential gains, losses and volatility in a portfolio.

Form 4 Insider Transactions: What Each Field Means →

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

X

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^*

Harrison Robert Gardner

(Last) (First) (Middle)

C/O SERA PROGNOSTICS, INC.

2749 EAST PARLEYS WAY, SUITE 200

(Street)

SALT LAKE CITY UTAH 84109

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	Chief Information Officer

2a. Foreign Trading Symbol

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

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

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

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

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

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:

Remarks:

Exit Form 4 filed solely to report that, as of March 12, 2026, the Reporting Person is no longer designated as an officer of the Issuer within the meaning of Rule 16a-1 of the Securities Exchange Act of 1934, as amended.

	/s/ Benjamin G. Jackson, Attorney-in-fact	05/06/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What does the SERA Form 4 filed by Harrison Robert Gardner show?

The Form 4 for SERA lists Harrison Robert Gardner, Chief Information Officer, as the reporting person. The provided data shows no reported stock transactions or derivative positions during the covered period.

Were any SERA shares bought or sold in this Form 4 filing?

No. The summary data for this Form 4 indicates zero buy transactions, zero sell transactions, and no net change in share ownership for the reporting person.

Does the SERA Form 4 show any option exercises or derivatives activity?

No. The derivative-related fields report zero exercises, zero derivative transactions, and an empty derivative position list, indicating no options or similar instruments were reported as exercised or traded.

What role does the reporting person have at SERA PROGNOSTICS, INC.?

The reporting person on this Form 4, Harrison Robert Gardner, is identified as an officer of SERA PROGNOSTICS, INC. with the title of Chief Information Officer, and is not listed as a director or 10% owner.

Does this SERA Form 4 indicate any changes in insider ownership?

The transaction summary shows zero buys, zero sells, and netBuySellShares of 0, suggesting no reported change in share ownership for the reporting person in this filing’s data.