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[Form 4] Aura Biosciences, Inc. Insider Trading Activity

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4
Rhea-AI Filing Summary

Form 4 overview: On 17 June 2025, Aura Biosciences (AURA) director Antony C. Mattessich reported equity-based awards that increase his direct ownership in the company.

  • Restricted stock units: 13,000 RSUs were granted at no cost. The units convert 1-for-1 into common shares and vest in full on the earlier of 17 June 2026 or the next annual shareholder meeting, contingent on continued service.
  • Stock options: 17,000 options with a US$6.18 exercise price were awarded on the same date. The options vest in full on the same schedule and expire 17 June 2035.
  • Post-transaction holding: Mattessich now directly owns 23,500 common shares (includes previously held shares plus the new RSUs).

No open-market purchases or sales occurred; the filing reflects routine director equity compensation aligned with Aura’s 2021 Stock Option and Incentive Plan.

Panoramica del Modulo 4: Il 17 giugno 2025, Antony C. Mattessich, direttore di Aura Biosciences (AURA), ha segnalato premi azionari che aumentano la sua partecipazione diretta nella società.

  • Unità azionarie vincolate: Sono state assegnate 13.000 RSU senza alcun costo. Le unità si convertono 1 a 1 in azioni ordinarie e maturano completamente il 17 giugno 2026 o alla prossima assemblea annuale degli azionisti, a condizione che il servizio continui.
  • Opzioni azionarie: Il medesimo giorno sono state assegnate 17.000 opzioni con un prezzo di esercizio di 6,18 USD. Le opzioni maturano secondo lo stesso calendario e scadono il 17 giugno 2035.
  • Detenzione post-transazione: Mattessich possiede ora direttamente 23.500 azioni ordinarie (comprendendo le azioni precedentemente detenute più le nuove RSU).

Non sono avvenuti acquisti o vendite sul mercato aperto; la comunicazione riflette una normale compensazione azionaria per i dirigenti, in linea con il Piano Stock Option e Incentivi 2021 di Aura.

Resumen del Formulario 4: El 17 de junio de 2025, Antony C. Mattessich, director de Aura Biosciences (AURA), reportó premios basados en acciones que incrementan su propiedad directa en la empresa.

  • Unidades de acciones restringidas: Se otorgaron 13,000 RSU sin costo alguno. Las unidades se convierten 1 a 1 en acciones comunes y se consolidan completamente el 17 de junio de 2026 o en la próxima junta anual de accionistas, condicionado a la continuidad del servicio.
  • Opciones sobre acciones: El mismo día se otorgaron 17,000 opciones con un precio de ejercicio de 6.18 USD. Las opciones se consolidan según el mismo calendario y vencen el 17 de junio de 2035.
  • Participación después de la transacción: Mattessich ahora posee directamente 23,500 acciones comunes (incluye acciones previamente poseídas más las nuevas RSU).

No se realizaron compras ni ventas en el mercado abierto; el informe refleja una compensación accionaria rutinaria para directores conforme al Plan de Opciones sobre Acciones e Incentivos 2021 de Aura.

Form 4 개요: 2025ë…� 6ì›� 17ì�, Aura Biosciences(AURA) ì´ì‚¬ì� Antony C. Mattessichê°€ 회사 ë‚� ì§ì ‘ ì§€ë¶„ì„ ëŠ˜ë¦¬ëŠ� ì£¼ì‹ ê¸°ë°˜ ë³´ìƒì� 보고했습니다.

  • 제한 ì£¼ì‹ ë‹¨ìœ„(RSU): 비용 ì—†ì´ 13,000 RSUê°€ 부여ë˜ì—ˆìŠµë‹ˆë‹¤. ì� ë‹¨ìœ„ë“¤ì€ 1대1ë¡� 보통주로 전환ë˜ë©°, 2026ë…� 6ì›� 17ì� ë˜ëŠ” ë‹¤ìŒ ì—°ë¡€ 주주ì´íšŒ ì¤� 빠른 시ì ì—� ì „ì•¡ 베스팅ë˜ë©�, ê³„ì† ê·¼ë¬´ ì¡°ê±´ì� 붙어 있습니다.
  • ì£¼ì‹ ë§¤ìˆ˜ì„ íƒê¶�: ê°™ì€ ë‚ ì§œì—� 행사가 6.18달러ì� 17,000ê°œì˜ ì˜µì…˜ì� 부여ë˜ì—ˆìŠµë‹ˆë‹¤. ì˜µì…˜ì€ ë™ì¼í•� ì¼ì •ì—� ë”°ë¼ ì „ì•¡ 베스팅ë˜ë©�, 2035ë…� 6ì›� 17ì¼ì— 만료ë©ë‹ˆë‹�.
  • 거래 í›� 보유 ì§€ë¶�: MattessichëŠ� 현재 ì§ì ‘ 23,500ì£¼ì˜ ë³´í†µì£¼ë¥¼ 보유하고 있습니다(기존 보유 주ì‹ê³� ì‹ ê·œ RSU í¬í•¨).

공개 시장ì—서ì� 매매ëŠ� 없었으며, ì´ë²ˆ ë³´ê³ ëŠ� Auraì� 2021ë…� 스톡옵션 ë°� ì¸ì„¼í‹°ë¸Œ 계íšì—� 따른 ì´ì‚¬ ì£¼ì‹ ë³´ìƒì—� ê´€í•� ì¼ìƒì ì¸ 보고입니ë‹�.

Présentation du formulaire 4 : Le 17 juin 2025, Antony C. Mattessich, administrateur d'Aura Biosciences (AURA), a déclaré des attributions d'actions augmentant sa participation directe dans la société.

  • Unités d’actions restreintes : 13 000 RSU ont été attribuées sans frais. Ces unités se convertissent à raison de 1 pour 1 en actions ordinaires et sont entièrement acquises au plus tôt le 17 juin 2026 ou lors de la prochaine assemblée annuelle des actionnaires, sous condition de maintien du service.
  • Options d’achat d’actions : Le même jour, 17 000 options avec un prix d’exercice de 6,18 USD ont été accordées. Les options sont acquises selon le même calendrier et expirent le 17 juin 2035.
  • Détention après la transaction : Mattessich détient désormais directement 23 500 actions ordinaires (comprenant les actions précédemment détenues ainsi que les nouvelles RSU).

Aucun achat ou vente sur le marché ouvert n’a eu lieu ; le dépôt reflète une rémunération en actions habituelle des administrateurs, conforme au Plan d’Options d’Achat d’Actions et d’Incitations 2021 d’Aura.

Übersicht Formular 4: Am 17. Juni 2025 meldete Antony C. Mattessich, Direktor von Aura Biosciences (AURA), aktienbasierte Vergütungen, die seinen direkten Anteil am Unternehmen erhöhen.

  • Restricted Stock Units (RSUs): 13.000 RSUs wurden ohne Kosten gewährt. Die Einheiten werden 1:1 in Stammaktien umgewandelt und sind vollständig am 17. Juni 2026 oder bei der nächsten jährlichen Hauptversammlung fällig, vorausgesetzt die Dienstzeit wird fortgesetzt.
  • Aktienoptionen: Am selben Tag wurden 17.000 Optionen mit einem Ausübungspreis von 6,18 USD gewährt. Die Optionen werden nach dem gleichen Zeitplan vollständig fällig und verfallen am 17. Juni 2035.
  • Bestand nach der Transaktion: Mattessich besitzt nun direkt 23.500 Stammaktien (einschließlich zuvor gehaltener Aktien plus der neuen RSUs).

Es gab keine Käufe oder Verkäufe am offenen Markt; die Meldung spiegelt die routinemäßige Aktienvergütung für Direktoren gemäß dem Aktienoptions- und Anreizplan von Aura aus dem Jahr 2021 wider.

Positive
  • None.
Negative
  • None.

Insights

TL;DR: Routine equity grants; modest alignment of director incentives, low immediate market impact.

The awards enlarge Mattessich’s ownership stake but are standard board compensation rather than discretionary buying. Because no cash changed hands and the exercise price roughly matches recent trading ranges, dilution effects are immaterial. Investors can view the grants as strengthening incentive alignment, yet the transaction does not signal management’s valuation view the way an open-market purchase might. Overall, the filing is informational with limited valuation implications.

TL;DR: Grants follow plan terms; governance appears compliant, no red flags detected.

The RSU and option awards are issued under the 2021 plan, vest on a one-year schedule, and include service-based conditions—standard practice for small-cap biotech boards. The one-year vesting aligns director focus with near-term milestones while limiting excessive dilution. Presence of a power-of-attorney signature indicates proper delegation for timely reporting. There are no indications of 10b5-1 defensive use or transactions during blackout periods, supporting a neutral governance assessment.

Panoramica del Modulo 4: Il 17 giugno 2025, Antony C. Mattessich, direttore di Aura Biosciences (AURA), ha segnalato premi azionari che aumentano la sua partecipazione diretta nella società.

  • Unità azionarie vincolate: Sono state assegnate 13.000 RSU senza alcun costo. Le unità si convertono 1 a 1 in azioni ordinarie e maturano completamente il 17 giugno 2026 o alla prossima assemblea annuale degli azionisti, a condizione che il servizio continui.
  • Opzioni azionarie: Il medesimo giorno sono state assegnate 17.000 opzioni con un prezzo di esercizio di 6,18 USD. Le opzioni maturano secondo lo stesso calendario e scadono il 17 giugno 2035.
  • Detenzione post-transazione: Mattessich possiede ora direttamente 23.500 azioni ordinarie (comprendendo le azioni precedentemente detenute più le nuove RSU).

Non sono avvenuti acquisti o vendite sul mercato aperto; la comunicazione riflette una normale compensazione azionaria per i dirigenti, in linea con il Piano Stock Option e Incentivi 2021 di Aura.

Resumen del Formulario 4: El 17 de junio de 2025, Antony C. Mattessich, director de Aura Biosciences (AURA), reportó premios basados en acciones que incrementan su propiedad directa en la empresa.

  • Unidades de acciones restringidas: Se otorgaron 13,000 RSU sin costo alguno. Las unidades se convierten 1 a 1 en acciones comunes y se consolidan completamente el 17 de junio de 2026 o en la próxima junta anual de accionistas, condicionado a la continuidad del servicio.
  • Opciones sobre acciones: El mismo día se otorgaron 17,000 opciones con un precio de ejercicio de 6.18 USD. Las opciones se consolidan según el mismo calendario y vencen el 17 de junio de 2035.
  • Participación después de la transacción: Mattessich ahora posee directamente 23,500 acciones comunes (incluye acciones previamente poseídas más las nuevas RSU).

No se realizaron compras ni ventas en el mercado abierto; el informe refleja una compensación accionaria rutinaria para directores conforme al Plan de Opciones sobre Acciones e Incentivos 2021 de Aura.

Form 4 개요: 2025ë…� 6ì›� 17ì�, Aura Biosciences(AURA) ì´ì‚¬ì� Antony C. Mattessichê°€ 회사 ë‚� ì§ì ‘ ì§€ë¶„ì„ ëŠ˜ë¦¬ëŠ� ì£¼ì‹ ê¸°ë°˜ ë³´ìƒì� 보고했습니다.

  • 제한 ì£¼ì‹ ë‹¨ìœ„(RSU): 비용 ì—†ì´ 13,000 RSUê°€ 부여ë˜ì—ˆìŠµë‹ˆë‹¤. ì� ë‹¨ìœ„ë“¤ì€ 1대1ë¡� 보통주로 전환ë˜ë©°, 2026ë…� 6ì›� 17ì� ë˜ëŠ” ë‹¤ìŒ ì—°ë¡€ 주주ì´íšŒ ì¤� 빠른 시ì ì—� ì „ì•¡ 베스팅ë˜ë©�, ê³„ì† ê·¼ë¬´ ì¡°ê±´ì� 붙어 있습니다.
  • ì£¼ì‹ ë§¤ìˆ˜ì„ íƒê¶�: ê°™ì€ ë‚ ì§œì—� 행사가 6.18달러ì� 17,000ê°œì˜ ì˜µì…˜ì� 부여ë˜ì—ˆìŠµë‹ˆë‹¤. ì˜µì…˜ì€ ë™ì¼í•� ì¼ì •ì—� ë”°ë¼ ì „ì•¡ 베스팅ë˜ë©�, 2035ë…� 6ì›� 17ì¼ì— 만료ë©ë‹ˆë‹�.
  • 거래 í›� 보유 ì§€ë¶�: MattessichëŠ� 현재 ì§ì ‘ 23,500ì£¼ì˜ ë³´í†µì£¼ë¥¼ 보유하고 있습니다(기존 보유 주ì‹ê³� ì‹ ê·œ RSU í¬í•¨).

공개 시장ì—서ì� 매매ëŠ� 없었으며, ì´ë²ˆ ë³´ê³ ëŠ� Auraì� 2021ë…� 스톡옵션 ë°� ì¸ì„¼í‹°ë¸Œ 계íšì—� 따른 ì´ì‚¬ ì£¼ì‹ ë³´ìƒì—� ê´€í•� ì¼ìƒì ì¸ 보고입니ë‹�.

Présentation du formulaire 4 : Le 17 juin 2025, Antony C. Mattessich, administrateur d'Aura Biosciences (AURA), a déclaré des attributions d'actions augmentant sa participation directe dans la société.

  • Unités d’actions restreintes : 13 000 RSU ont été attribuées sans frais. Ces unités se convertissent à raison de 1 pour 1 en actions ordinaires et sont entièrement acquises au plus tôt le 17 juin 2026 ou lors de la prochaine assemblée annuelle des actionnaires, sous condition de maintien du service.
  • Options d’achat d’actions : Le même jour, 17 000 options avec un prix d’exercice de 6,18 USD ont été accordées. Les options sont acquises selon le même calendrier et expirent le 17 juin 2035.
  • Détention après la transaction : Mattessich détient désormais directement 23 500 actions ordinaires (comprenant les actions précédemment détenues ainsi que les nouvelles RSU).

Aucun achat ou vente sur le marché ouvert n’a eu lieu ; le dépôt reflète une rémunération en actions habituelle des administrateurs, conforme au Plan d’Options d’Achat d’Actions et d’Incitations 2021 d’Aura.

Übersicht Formular 4: Am 17. Juni 2025 meldete Antony C. Mattessich, Direktor von Aura Biosciences (AURA), aktienbasierte Vergütungen, die seinen direkten Anteil am Unternehmen erhöhen.

  • Restricted Stock Units (RSUs): 13.000 RSUs wurden ohne Kosten gewährt. Die Einheiten werden 1:1 in Stammaktien umgewandelt und sind vollständig am 17. Juni 2026 oder bei der nächsten jährlichen Hauptversammlung fällig, vorausgesetzt die Dienstzeit wird fortgesetzt.
  • Aktienoptionen: Am selben Tag wurden 17.000 Optionen mit einem Ausübungspreis von 6,18 USD gewährt. Die Optionen werden nach dem gleichen Zeitplan vollständig fällig und verfallen am 17. Juni 2035.
  • Bestand nach der Transaktion: Mattessich besitzt nun direkt 23.500 Stammaktien (einschließlich zuvor gehaltener Aktien plus der neuen RSUs).

Es gab keine Käufe oder Verkäufe am offenen Markt; die Meldung spiegelt die routinemäßige Aktienvergütung für Direktoren gemäß dem Aktienoptions- und Anreizplan von Aura aus dem Jahr 2021 wider.

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*
Mattessich Antony C.

(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
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
06/17/2025
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 06/17/2025 A 13,000(1) A $0 23,500 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
Stock Option (Right to Buy) $6.18 06/17/2025 A 17,000 (2) 06/17/2035 Common Stock 17,000 $0 17,000 D
Explanation of Responses:
1. These shares were acquired pursuant to a restricted stock unit ("RSU") award under the Issuer's 2021 Stock Option and Incentive Plan. Each RSU represents the right to receive one share of the Issuer's Common Stock. These RSUs vest in full upon the earlier to occur of (a) June 17, 2026 or (b) the next annual meeting of the Issuer's stockholders, subject to the Reporting Person's continued service as of such vesting date.
2. This stock option will vest and become exercisable in full upon the earlier to occur of (a) June 17, 2026 or (b) the next annual meeting of the Issuer's stockholders, subject to the Reporting Person's continued service as of such vesting date.
Remarks:
Exhibit 24.1 - Power of Attorney.
/s/ Conor Kilroy, as Attorney-in-Fact 06/18/2025
** 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.

FAQ

How many Aura Biosciences (AURA) shares did Antony C. Mattessich acquire?

He received 13,000 restricted stock units, each convertible into one common share.

What is the exercise price of the new stock options granted to the AURA director?

The 17,000 stock options carry a US$6.18 exercise price.

When do the RSUs and options granted on 17 June 2025 vest?

Both the RSUs and options vest in full on the earlier of 17 June 2026 or the next annual shareholder meeting.

What is Antony C. Mattessich’s total direct share ownership after these grants?

Following the awards, he directly owns 23,500 AURA common shares.

Does the Form 4 indicate any open-market purchases or sales?

No. The filing only reports equity grants; no cash purchases or dispositions occurred.
Aura Biosciences, Inc.

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421.63M
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Biotechnology
Biological Products, (no Disgnostic Substances)
United States
BOSTON