Aura Biosciences (AURA) files Form 144 to resell 37,500 RSU shares

Rhea-AI Filing Summary

Aura Biosciences, Inc. reports a proposed sale of 37,500 shares of Common Stock represented by a restricted stock unit award granted under the company's 2021 Stock Option and Incentive Plan. The RSU award is dated 06/02/2025 and the Form 144 filing entry is dated 06/16/2026.

The entry lists the securities to be sold as Common Stock on Nasdaq and identifies the award as subject to vesting requirements under the 2021 plan.

Insights

Securities Counsel

Form 144 notifies the SEC of a proposed resale of restricted shares.

The entry shows 37,500 shares tied to an RSU grant under the 2021 Stock Option and Incentive Plan, dated 06/02/2025. Form 144 is a notice of intent to sell under Rule 144; it does not itself effect a sale.

Cash‑flow treatment and whether the RSUs have satisfied vesting conditions are not stated in the excerpt; subsequent filings or broker records would show completed transactions.

Key Figures

Form date: 06/16/2026 Award date: 06/02/2025 Shares proposed for resale: 37,500 shares +1 more

4 metrics

Form date 06/16/2026 Form 144 entry date

Award date 06/02/2025 Restricted stock unit award date

Shares proposed for resale 37,500 shares Common Stock represented by RSU

Trading venue Nasdaq Listed market for the Common Stock

Key Terms

Restricted Stock Unit (RSU), Form 144, 2021 Stock Option and Incentive Plan

3 terms

Restricted Stock Unit (RSU) financial

"Restricted Stock unit award granted pursuant to the Issuer's 2021 Stock Option and Incentive Plan"

A restricted stock unit (RSU) is a promise from a company to give an employee company shares (or cash equal to their value) at a future date if certain conditions are met, such as staying with the company or hitting performance targets. For investors, RSUs matter because when they convert into actual shares they increase the number of shares available and can create selling pressure as employees cash out—think of them as a future paycheck paid in company stock.

Form 144 regulatory

"144: Securities To Be Sold"

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.

2021 Stock Option and Incentive Plan financial

"granted pursuant to the Issuer's 2021 Stock Option and Incentive Plan"

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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
Common Stock	Morgan Stanley Smith Barney LLC Drive 200 West Civic Center 4th Floor Sandy UT 84070	12824	82330.08	103386558	06/16/2026	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 *
Common Stock	06/02/2025	Restricted Stock unit award granted pursuant to the Issuer's 2021 Stock Option and Incentive Plan, subject to vesting requirements.	Aura Biosciences, Inc.			37500	06/02/2025	N/A

* 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

Nothing to Report

144: Remarks and Signature

Remarks

Date of Notice

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

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

FAQ

What does Aura Biosciences' Form 144 for AURA report?

It reports a proposed resale of 37,500 shares represented by an RSU award. The RSU is dated 06/02/2025 under the 2021 Stock Option and Incentive Plan, and the filing entry is dated 06/16/2026.

Does the Form 144 entry show the shares were sold?

No — it notifies an intent to sell rather than confirming a sale. Form 144 is a notice under resale rules; the excerpt lists the RSU and proposed shares but does not report a completed transaction or proceeds.

What type of award is tied to the 37,500 shares in the filing?

The shares are tied to a Restricted Stock Unit (RSU) award. The RSU was granted pursuant to Aura Biosciences' 2021 Stock Option and Incentive Plan and is described as subject to vesting requirements.

Where are the shares listed for sale in the Form 144 excerpt?

The securities are identified as Common Stock on Nasdaq. The filing lines show the security class as Common Stock and reference Nasdaq as the trading market in the excerpt.