Tiffany Eul Davis Inglis - 15 Oct 2025 Form 4 Insider Report for SERA PROGNOSTICS, INC. (SERA)

Role: Chief Medical Officer
Signature: /s/ Benjamin G. Jackson, Attorney-in-fact
Issuer symbol: SERA
Transactions as of: 15 Oct 2025
Net transactions value: $0
Form type: 4
Filing time: 15 Oct 2025, 19:12:12 UTC
Previous filing: 15 Oct 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Inglis Tiffany Eul Davis	Chief Medical Officer	C/O SERA PROGNOSTICS, INC., 2749 EAST PARLEYS WAY, SUITE 200, SALT LAKE CITY	/s/ Benjamin G. Jackson, Attorney-in-fact	15 Oct 2025	0002091798

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SERA	Class A Common Stock	Award	$0	+75,000		$0.000000	75,000	15 Oct 2025	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	SERA	Stock Option (right to buy)	Award	$0	+107,000		$0.000000	107,000	15 Oct 2025	Class A Common Stock	107,000	$3.13	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each share is represented by a restricted stock unit ("RSU"). These RSUs vest over four years as follows: 25% of the original grant amount vests on the first anniversary of the vesting commencement date, which is October 10, 2025, and 1/12 of the remaining amount vests in quarterly installments for three years thereafter, subject to the Reporting Person continuing to provide services to the issuer.
F2	These stock options vest over four years as follows: 25% of the original grant amount vests on the first anniversary of the vesting commencement date, which is October 10, 2025, and 1/36 of the remaining amount vests in monthly installments for three years thereafter, subject to the Reporting Person continuing to provide services to the issuer.

Content

Each share is represented by a restricted stock unit ("RSU"). These RSUs vest over four years as follows: 25% of the original grant amount vests on the first anniversary of the vesting commencement date, which is October 10, 2025, and 1/12 of the remaining amount vests in quarterly installments for three years thereafter, subject to the Reporting Person continuing to provide services to the issuer.

These stock options vest over four years as follows: 25% of the original grant amount vests on the first anniversary of the vesting commencement date, which is October 10, 2025, and 1/36 of the remaining amount vests in monthly installments for three years thereafter, subject to the Reporting Person continuing to provide services to the issuer.