SERA files Form 144 for Class A Common tied to RSU vesting

SERA submitted a Form 144 notifying a proposed sale of Class A Common shares in connection with restricted stock unit vesting.

Rhea-AI Filing Summary

SERA submitted a Form 144 notifying a proposed sale of Class A Common shares in connection with restricted stock unit vesting. The filing references a vesting date of 03/10/2026 and lists prior sales of 4,155 shares on 12/10/2025.

Insights

Securities Compliance Counsel

Form 144 reports a proposed resale tied to RSU vesting; procedural, not a corporate action.

The notice lists Class A Common and a vesting date of 03/10/2026, indicating the holder intends to sell shares that become vested. The filing includes a prior sale of 4,155 shares on 12/10/2025.

Timing and sale mechanics are not shown; subsequent Form 4 or broker reports will disclose actual transactions and proceeds.

FAQ

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

What does SERA's Form 144 filing mean?

It indicates a proposed resale of Class A Common shares tied to RSU vesting on 03/10/2026. The filing notifies the SEC and market intermediaries of an intention to sell vested shares, rather than confirming completed trades or proceeds.

How many shares does the Form 144 reference for SERA?

The excerpt lists a prior sale of 4,155 shares on 12/10/2025 and references Class A Common connected to RSU vesting on 03/10/2026. The filing excerpt does not state an aggregate offered amount for the proposed sale.

Who is listed as the broker or counterparty in the Form 144?

The filing names Morgan Stanley Smith Barney LLC with an address at 1 New York Plaza, suggesting that broker-dealer involvement is planned. Specific sale methods or settlement details are not provided in the excerpt.

Does this Form 144 confirm that SERA received proceeds?

No. The Form 144 notice reports a proposed resale by a holder upon RSU vesting and does not state any proceeds received by the issuer. It is a disclosure of intent to sell, not confirmation of completed sales.

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

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Accepted by SEC EDGAR 03/12/2026 - 08:07 PM 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	0001891299
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	Lindgardt Zhenya
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
Relationship to Issuer	Director

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	22639	43028	38594793	03/10/2026	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	03/10/2026	Restricted Stock Unit Vesting	Issuer			22639	03/10/2026	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
Zhenya Lindgardt 2749 E. Parleys Way Suite 200 Salt Lake City UT 84109	Class A Common	12/10/2025	4155	13741

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	03/12/2026
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/ Zhenya Lindgardt
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)