Tax-related Aura Biosciences (AURA) insider sale covers RSU withholding

Rhea-AI Filing Summary

Aura Biosciences, Inc. officer Anthony S. Gibney reported an automatic sale of common stock tied to tax withholding. On June 16, 2026, 12,824 shares were sold at $6.42 per share to cover tax obligations from vesting restricted stock units, leaving him with 265,354 directly held shares. The footnote states these sales were executed automatically and not at his discretion.

Insider Trade Summary

Net Seller: 12,824 shares ($82,330)

Net Sell 1 txn

Insider Gibney Anthony S

Role See Remarks

Sold 12,824 shs ($82K)

Type	Security	Shares	Price	Value
Sale	Common Stock	12,824	$6.42	$82K

Holdings After Transaction: Common Stock — 265,354 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 12,824 shares Sale price: $6.42 per share Shares held after sale: 265,354 shares

3 metrics

Shares sold 12,824 shares Open-market sale on June 16, 2026

Sale price $6.42 per share Price for common stock sold to cover tax withholding

Shares held after sale 265,354 shares Direct ownership following the June 16, 2026 transaction

Key Terms

restricted stock units, tax withholding obligations, open-market sale

3 terms

restricted stock units financial

"in connection with the vesting of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

tax withholding obligations financial

"required to be sold by the Reporting Person to cover tax withholding obligations"

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

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Form 4 Insider Transactions: What Each Field Means →

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^*

Gibney Anthony S

(Last) (First) (Middle)

C/O AURA BIOSCIENCES, INC.

80 GUEST STREET

(Street)

BOSTON MASSACHUSETTS 02135

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/16/2026

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

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

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

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	06/16/2026		S(1)		12,824	D	$6.42	265,354	D

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.

Remarks:

Chief Financial and Business Officer.

	/s/ Conor Kilroy, as Attorney-in-Fact	06/16/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Aura Biosciences (AURA) report for Anthony S. Gibney?

Aura Biosciences reported that officer Anthony S. Gibney sold 12,824 shares of common stock at $6.42 per share. The sale was made to cover tax withholding obligations related to vesting restricted stock units and was executed automatically, not at his discretion.

Was the Aura Biosciences (AURA) insider sale a discretionary trade?

No. The filing states the shares sold by Anthony S. Gibney were required to cover tax withholding obligations from vesting restricted stock units. The transactions were automatic and not executed at the reporting person’s discretion, indicating a routine tax-related event rather than a voluntary sale.

How many Aura Biosciences (AURA) shares does Anthony S. Gibney hold after the transaction?

After selling 12,824 shares to cover tax obligations, Anthony S. Gibney holds 265,354 Aura Biosciences common shares directly. This remaining stake, reported in the Form 4, helps investors gauge the size of the transaction relative to his ongoing ownership position.

At what price were the Aura Biosciences (AURA) shares sold in this Form 4?

The reported sale occurred at $6.42 per share for 12,824 Aura Biosciences common shares. This price reflects the transaction used to satisfy tax withholding obligations resulting from the vesting of restricted stock units awarded to the reporting officer.

What does the Form 4 footnote say about Aura Biosciences (AURA) insider sales?

The footnote explains that the reported sales represent shares required to be sold to cover tax withholding obligations from vesting restricted stock units. It further clarifies that these sales were automatic and not made at the discretion of the reporting person, Anthony S. Gibney.