SERA files Rule 144 notice for Class A Common

SERA submitted a Rule 144 notice relating to Class A Common stock.

Rhea-AI Filing Summary

SERA submitted a Rule 144 notice relating to Class A Common stock. The filing lists 6,990 shares tied to Restricted Stock Unit Vesting scheduled 06/11/2026 and records recent dispositions by Zhenya Lindgardt of 2,973 shares on 03/11/2026 and 20,755 shares on 06/09/2026.

Insights

Securities Compliance Counsel

Rule 144 notice records planned RSU vesting and prior insider dispositions.

The filing lists 6,990 Class A Common shares associated with Restricted Stock Unit vesting on 06/11/2026. It also records prior sales by Zhenya Lindgardt of 2,973 shares (03/11/2026) and 20,755 shares (06/09/2026).

These entries are procedural disclosures under Rule 144; timing and cash‑flow treatment are not stated in the excerpt. Subsequent filings or broker confirmations would show settlement and proceeds details.

Key Figures

RSU vesting: 6,990 shares Insider sale: 2,973 shares Insider sale: 20,755 shares

3 metrics

RSU vesting 6,990 shares Restricted Stock Unit Vesting on 06/11/2026

Insider sale 2,973 shares Sale by Zhenya Lindgardt on 03/11/2026

Insider sale 20,755 shares Sale by Zhenya Lindgardt on 06/09/2026

Key Terms

Rule 144, Restricted Stock Unit Vesting, Securities Sold During The Past 3 Months

3 terms

Rule 144 regulatory

"144: Securities To Be Sold"

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.

Restricted Stock Unit Vesting financial

"Class A Common | 06/11/2026 | Restricted Stock Unit Vesting"

Securities Sold During The Past 3 Months regulatory

"144: Securities Sold During The Past 3 Months"

FAQ

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

What does SERA's Rule 144 filing report?

The filing reports 6,990 Class A Common shares tied to Restricted Stock Unit vesting on 06/11/2026, plus prior insider sales of 2,973 and 20,755 shares on 03/11/2026 and 06/09/2026 respectively.

Who is the insider named in the SERA Rule 144 notice?

The notice names Zhenya Lindgardt as a reporting person, showing sales of 2,973 shares on 03/11/2026 and 20,755 shares on 06/09/2026, and an RSU vesting event of 6,990 shares on 06/11/2026.

Does the filing state how proceeds will be used?

The excerpt does not state any use of proceeds or cash‑flow recipients. It lists the securities and dates (including 06/11/2026 vesting) but does not disclose proceeds, purchasers, or allocation details.

Are the listed shares being registered or offered for sale by SERA?

The filing is a Rule 144 notice reporting resale/vesting events for Class A Common stock, including 6,990 RSU shares vesting on 06/11/2026; it does not describe an offering or registration statement in the provided excerpt.

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

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Accepted by SEC EDGAR 06/15/2026 - 04:05 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	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	6990	14016	39158725	06/11/2026	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	06/11/2026	Restricted Stock Unit Vesting	Issuer			6990	06/11/2026	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	03/11/2026	2973	6068
Zhenya Lindgardt 2749 E. Parleys Way Suite 200 Salt Lake City UT 84109	Class A Common	06/09/2026	20755	43204

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	06/15/2026
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)