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

SERA submitted a Form 144 notice reporting proposed sales of Class A Common stock tied to restricted stock unit vesting.

Rhea-AI Filing Summary

SERA submitted a Form 144 notice reporting proposed sales of Class A Common stock tied to restricted stock unit vesting. The filing lists a sale method tied to Restricted Stock Unit Vesting with an effective date of 06/11/2026. It also discloses prior sales by Austin Aerts on 03/11/2026 and 06/09/2026.

Insights

Securities Counsel

Form 144 notifies the market of intended resale under Rule 144 procedures.

Form 144 is a statutory notice used when restricted or control securities are proposed to be sold in reliance on Rule 144. The excerpt lists Class A Common shares tied to Restricted Stock Unit Vesting with an indicated date of 06/11/2026.

Cash‑flow treatment and aggregate proceeds are not stated in the excerpt; subsequent Form 4 or transaction reports may show actual dispositions and prices.

Key Figures

Form date / vesting date: 06/11/2026 Numeric entry: 2,037 Numeric entry: 4,085 +3 more

6 metrics

Form date / vesting date 06/11/2026 Restricted Stock Unit Vesting date shown

Numeric entry 2,037 Number appearing near securities lines in the excerpt

Numeric entry 4,085 Number appearing near securities lines in the excerpt

Numeric entry 39,158,725 Large numeric entry shown near securities information

Prior sale - 03/11/2026 1,019 shares Austin Aerts sale listed on 03/11/2026

Prior sale - 06/09/2026 5,440 shares Austin Aerts sale listed on 06/09/2026

Key Terms

Form 144, Restricted Stock Unit Vesting, Class A Common

3 terms

Form 144 regulatory

"Class A Common | Morgan Stanley Smith Barney LLC ... | 06/11/2026"

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.

Restricted Stock Unit Vesting financial

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

Class A Common financial

"Class A Common | Morgan Stanley Smith Barney LLC ... | NASDAQ"

FAQ

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

What does SERA's Form 144 filing mean?

It notifies the SEC and market of proposed sales of restricted Class A Common stock tied to vesting. The filing lists Restricted Stock Unit Vesting with a 06/11/2026 date and example prior sales by Austin Aerts.

How many shares are mentioned in the SERA excerpt?

The excerpt includes numeric entries such as 2037, 4085, and 39,158,725 shown near securities lines. The filing also lists prior sale quantities associated with Austin Aerts on two dates.

Who is the reported seller in the prior transactions?

The excerpt identifies Austin Aerts as the party with sales on 03/11/2026 and 06/09/2026, listing associated numeric entries (e.g., 1019 and 5440 in the table).

Does the Form 144 show proceeds or sale prices for SERA?

No sale prices or proceeds are provided in the provided excerpt. The filing lists dates and share counts related to vesting and past sales but does not state dollar proceeds or trade prices.

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	0001979974
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	Aerts Austin
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	2037	4085	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			2037	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
Austin Aerts 2749 E. Parleys Way Suite 200 Salt Lake City UT 84109	Class A Common	03/11/2026	1019	2080
Austin Aerts 2749 E. Parleys Way Suite 200 Salt Lake City UT 84109	Class A Common	06/09/2026	5440	11324

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/ Austin Aerts
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)