Sera Prognostics officer sells 8,024 shares

The reported transaction funded tax withholding through sell-to-cover transactions required by the issuer, rather than a discretionary sale by the officer.

Rhea-AI Filing Summary

Sera Prognostics, Inc. officer Tiffany Inglis reported a sale of 8,024 Class A common shares associated with restricted stock unit vesting on October 12, 2026. The remarks state that the issuer required sell-to-cover transactions to fund tax withholding and that the sale was not discretionary. The notice lists an aggregate market value of $16,294 for the shares.

Key Figures

Shares reported sold: 8,024 shares Aggregate market value: $16,294 Class A shares outstanding: 39,449,466 shares +2 more

5 metrics

Shares reported sold 8,024 shares Class A common shares associated with restricted stock unit vesting on October 12, 2026

Aggregate market value $16,294 Class A common shares covered by the notice

Class A shares outstanding 39,449,466 shares Securities information

Prior-period shares sold 486 shares Class A common shares sold on September 10, 2026

Gross proceeds from prior-period sale $972 486 shares sold on September 10, 2026

Key Terms

sell to cover transactions, Restricted Stock Unit Vesting, Rule 144

3 terms

sell to cover transactions financial

"satisfaction of tax withholding obligations to be funded by sell to cover transactions"

Restricted Stock Unit Vesting financial

"Restricted Stock Unit Vesting"

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

FAQ

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

How many SERA shares did Tiffany Inglis report selling?

Tiffany Inglis, an officer of Sera Prognostics, reported selling 8,024 Class A common shares on October 12, 2026, in connection with restricted stock unit vesting. The remarks state that the issuer required the sell-to-cover transaction to fund tax withholding.

How many SERA shares had Tiffany Inglis sold in the prior three months?

The notice lists 486 Class A common shares sold on September 10, 2026, for gross proceeds of $972.

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

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Available on EDGAR 10/13/2026 - 05:04 PM EDT Accepted by SEC EDGAR 10/13/2026 - 05:04 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002091798
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Sera Prognostics, Inc.
SEC File Number	001-40606
Address of Issuer	2749 East Parleys Way Suite 200 Salt Lake City UTAH 84109
Phone	(801)-990-0520
Name of Person for Whose Account the Securities are To Be Sold	Inglis Tiffany Eul Davis
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A Common	Morgan Stanley Smith Barney LLC 1 New York Plaza 38th Floor New York NY 10004	8024	16294	39449466	10/12/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A Common	10/12/2026	Restricted Stock Unit Vesting	Issuer			8024	10/12/2026	Not Applicable

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Tiffany Inglis 2749 E. Parleys Way Suite 200 Salt Lake City UT 84109	Class A Common	09/10/2026	486	972

144: Remarks and Signature

Remarks	The sale on this form represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. 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.
Date of Notice	10/13/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Tiffany Inglis
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)