SERA Form 144: RSU Vesting and Insider Sales Listed

SERA filed a Form 144 notice reporting sales and vesting-related activity in Class A Common stock.

Rhea-AI Filing Summary

SERA filed a Form 144 notice reporting sales and vesting-related activity in Class A Common stock. The excerpt lists a Restricted Stock Unit Vesting event dated 06/09/2026 and two sales reported for the three months ended in 03/10/2026 and 03/11/2026, showing 22,639 and 2,973 shares respectively. The filing names Zhenya Lindgardt as a seller and lists Morgan Stanley Smith Barney LLC as a broker on the record.

Insights

Compliance Counsel

Form 144 notice records brokered sales and an RSU vesting date; this is a transfer/disposition disclosure.

The excerpt lists a Restricted Stock Unit Vesting event dated 06/09/2026 and two reported dispositions of 22,639 and 2,973 Class A Common shares on 03/10/2026 and 03/11/2026. It names the selling person and a brokerage firm.

These disclosures satisfy resale-reporting mechanics; subsequent filings may show settlement or additional broker confirmations if required by transfer rules.

Key Figures

RSU vesting date: 06/09/2026 Shares sold on 03/10/2026: 22,639 shares Shares sold on 03/11/2026: 2,973 shares +1 more

4 metrics

RSU vesting date 06/09/2026 Restricted Stock Unit Vesting

Shares sold on 03/10/2026 22,639 shares Securities sold during the past 3 months

Shares sold on 03/11/2026 2,973 shares Securities sold during the past 3 months

Broker on record Morgan Stanley Smith Barney LLC Listed in filer/broker information

Key Terms

Restricted Stock Unit Vesting, Form 144, Class A Common

3 terms

Restricted Stock Unit Vesting financial

"Class A Common | 06/09/2026 | Restricted Stock Unit Vesting"

Form 144 regulatory

"CONTENT METADATA: "form_type": "144""

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Class A Common financial

"Class A Common | Morgan Stanley Smith Barney LLC"

FAQ

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

What does SERA's Form 144 show about recent share activity?

The Form 144 lists a Restricted Stock Unit vesting dated 06/09/2026 and two reported dispositions of 22,639 and 2,973 Class A Common shares on 03/10/2026 and 03/11/2026. It names the selling person and broker.

Who is the seller named in the SERA Form 144 excerpt?

The excerpt names Zhenya Lindgardt as the selling person associated with the reported transactions and provides an address in Salt Lake City, Utah.

Was a broker identified on the SERA Form 144 filing?

Yes; the excerpt lists Morgan Stanley Smith Barney LLC with an address at 1 New York Plaza, New York, NY, as the broker associated with the reported Class A Common transactions.

What securities are referenced in the SERA Form 144 excerpt?

The filing references Class A Common stock and specifically notes a Restricted Stock Unit Vesting event dated 06/09/2026, along with reported sales of Class A Common shares.

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

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Accepted by SEC EDGAR 06/10/2026 - 04:06 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	20755	43204	39158725	06/09/2026	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	06/09/2026	Restricted Stock Unit Vesting	Issuer			20755	06/09/2026	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	03/10/2026	22639	43028
Zhenya Lindgardt 2749 E. Parleys Way Suite 200 Salt Lake City UT 84109	Class A Common	03/11/2026	2973	6068

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	06/10/2026
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)