Aura Biosciences CEO sells 9,049 shares to cover RSU taxes

Aura Biosciences (AURA) Form 4: President and Chief Executive Officer (also a Director) reported an automatic sale tied to tax withholding from RSU vesting.

Rhea-AI Filing Summary

Aura Biosciences (AURA) Form 4: President and Chief Executive Officer (also a Director) reported an automatic sale tied to tax withholding from RSU vesting. On 10/29/2025, the reporting person sold 9,049 shares of common stock at $6.35 per share (Transaction Code S).

Following the transaction, beneficial ownership was 474,391 shares held directly and 127,763 shares held indirectly through the Elisabet de los Pinos Revocable Trust U/D/T dated April 8, 2016. The filing notes the sale was executed solely to satisfy tax obligations and not at the reporting person’s discretion.

Insider Trade Summary

Net Seller: 9,049 shares

Net Sell 2 txns

Insider de los Pinos Elisabet

Role See Remarks

Sold 9,049 shs ($57K)

Type	Security	Shares	Price	Value
Sale	Common Stock	9,049	$6.35	$57K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 474,391 shares (Direct); Common Stock — 127,763 shares (Indirect, By EdIP Revocable Trust)

Footnotes (2)

1. F1. The sales reported on this Form 4 represent the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. Such sales were automatic and not at the discretion of the Reporting Person.
2. F2. The shares are held by the Elisabet de los Pinos Revocable Trust U/D/T dated April 8, 2016, of which the Reporting Person is a trustee.

FAQ

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

What did AURA’s insider report on Form 4?

A sale of 9,049 shares of Aura Biosciences common stock at $6.35 on 10/29/2025 to cover RSU tax withholding.

Who is the reporting person in AURA’s Form 4?

Aura’s President and Chief Executive Officer, who also serves as a Director.

How many AURA shares does the insider own after the transaction?

474,391 shares directly and 127,763 shares indirectly via the Elisabet de los Pinos Revocable Trust.

What does Transaction Code S indicate?

Code S denotes an open-market or private sale of non-derivative securities.

Was the AURA sale discretionary?

No. The filing states the sale was automatic to satisfy tax withholding on RSU vesting.

Does the Form 4 mention a trading plan?

The form includes a 10b5-1(c) checkbox instruction, but the excerpt only specifies a tax withholding-driven sale.

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

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Accepted by SEC EDGAR 10/29/2025 - 05:05 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

de los Pinos Elisabet

(Last) (First) (Middle)

C/O AURA BIOSCIENCES, INC.

80 GUEST STREET

(Street)

BOSTON MA 02135

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Aura Biosciences, Inc. [ AURA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	See Remarks

3. Date of Earliest Transaction (Month/Day/Year)
10/29/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/29/2025		S(1)		9,049	D	$6.35	474,391	D
Common Stock								127,763	I	By EdIP Revocable Trust(2)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sales reported on this Form 4 represent the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. Such sales were automatic and not at the discretion of the Reporting Person.

2. The shares are held by the Elisabet de los Pinos Revocable Trust U/D/T dated April 8, 2016, of which the Reporting Person is a trustee.

Remarks:

President and Chief Executive Officer

	/s/ Conor Kilroy, as Attorney-in-Fact	10/29/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.