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[Form 4] Biogen Inc. Insider Trading Activity

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

Biogen Inc. (BIIB) � Form 4 insider transaction

Director Eric K. Rowinsky reported the acquisition of 2,370 shares of Biogen common stock on 06/17/2025. The filing lists the transaction code “A,� indicating the shares were acquired rather than sold; the stated price is $0.00, suggesting a board-related equity grant or similar stock-based award. Following the transaction, Rowinsky’s direct beneficial ownership increased to 24,339 shares, up from 21,969 shares—an increase of roughly 11%.

No derivative securities were reported, and there were no dispositions. The filing was signed on 06/18/2025 by an attorney-in-fact.

From an investment perspective, the event is routine and low-impact: it reflects standard director compensation and modestly tightens alignment between the board member and shareholders without affecting Biogen’s capital structure or cash flows.

Biogen Inc. (BIIB) � Transazione interna Form 4

Il direttore Eric K. Rowinsky ha comunicato l'acquisto di 2.370 azioni ordinarie di Biogen il 17/06/2025. Il modulo riporta il codice transazione “A�, che indica che le azioni sono state acquisite e non vendute; il prezzo indicato è $0,00, suggerendo un premio azionario legato al consiglio di amministrazione o un simile riconoscimento basato su azioni. Dopo la transazione, la proprietà diretta di Rowinsky è salita a 24.339 azioni, rispetto alle 21.969 precedenti, con un aumento di circa l'11%.

Non sono stati segnalati strumenti derivati né disposizioni. Il modulo è stato firmato il 18/06/2025 da un procuratore legale.

Dal punto di vista dell'investimento, l'evento è ordinario e di scarso impatto: riflette una normale remunerazione del direttore e rafforza leggermente l'allineamento tra il membro del consiglio e gli azionisti senza influire sulla struttura del capitale o sui flussi di cassa di Biogen.

Biogen Inc. (BIIB) � Transacción interna Formulario 4

El director Eric K. Rowinsky reportó la adquisición de 2,370 acciones ordinarias de Biogen el 17/06/2025. El formulario indica el código de transacción “A�, lo que significa que las acciones fueron adquiridas y no vendidas; el precio declarado es $0.00, lo que sugiere una concesión de acciones relacionada con el consejo o una recompensa similar basada en acciones. Tras la transacción, la propiedad directa de Rowinsky aumentó a 24,339 acciones, desde 21,969, un incremento de aproximadamente el 11%.

No se reportaron valores derivados ni disposiciones. El formulario fue firmado el 18/06/2025 por un apoderado.

Desde una perspectiva de inversión, el evento es rutinario y de bajo impacto: refleja una compensación estándar para directores y alinea modestamente al miembro del consejo con los accionistas sin afectar la estructura de capital ni los flujos de efectivo de Biogen.

Biogen Inc. (BIIB) � 내부� 거래 신고� Form 4

이사 Eric K. Rowinsky2025� 6� 17�� Biogen 보통� 2,370�� 취득했다� 보고했습니다. 신고서에� 거래 코드 “A”갶� 기재되어 있어 주식� 매도하지 않고 취득� �임을 나타냅니�; 명시� 갶격은 $0.00으로, 이사� 관� 주식 부� 또는 유사� 주식 기반 보상� 의미합니�. 거래 � Rowinsky� 직접 보유 주식은 21,969주에� 24,339�� � 11% 증갶했습니�.

파생상품 증권이나 처분 내역은 없었으며, 신고서는 2025� 6� 18� 대리인� 서명했습니다.

투자 관점에� � 사건은 일상적이� 영향� 적은 사항으로, 이사� 표준 보상이며 이사� 구성원과 주주 간의 연계� 다소 강화하지� Biogen� 자본 구조� 현금 흐름에는 영향� 미치지 않습니다.

Biogen Inc. (BIIB) � Transaction d’initié Formulaire 4

Le directeur Eric K. Rowinsky a déclaré l’acquisition de 2 370 actions ordinaires de Biogen le 17/06/2025. Le formulaire indique le code de transaction « A », signifiant que les actions ont été achetées et non vendues ; le prix indiqué est de 0,00 $, ce qui suggère une attribution d’actions liée au conseil d’administration ou une récompense similaire basée sur des actions. Après la transaction, la détention directe de Rowinsky est passée à 24 339 actions, contre 21 969 auparavant, soit une augmentation d’environ 11 %.

Aucun instrument dérivé ni cession n’a été signalé. Le formulaire a été signé le 18/06/2025 par un mandataire.

Du point de vue de l’investissement, l’événement est routinier et à faible impact : il reflète une rémunération standard des administrateurs et renforce légèrement l’alignement entre le membre du conseil et les actionnaires sans affecter la structure du capital ou les flux de trésorerie de Biogen.

Biogen Inc. (BIIB) � Form 4 Insider-Transaktion

Direktor Eric K. Rowinsky meldete den Erwerb von 2.370 Aktien der Biogen-Stammaktien am 17.06.2025. Die Meldung enthält den Transaktionscode „A�, was darauf hinweist, dass die Aktien erworben und nicht verkauft wurden; der angegebene Preis beträgt 0,00 $, was auf eine aktienbasierte Zuwendung im Zusammenhang mit dem Vorstand oder eine ähnliche Aktienprämie hindeutet. Nach der Transaktion erhöhte sich Rowinskys direkte Beteiligung auf 24.339 Aktien, von zuvor 21.969 Aktien � eine Steigerung von etwa 11 %.

Es wurden keine Derivate gemeldet, und es gab keine Veräußerungen. Die Meldung wurde am 18.06.2025 von einem Bevollmächtigten unterschrieben.

Aus Anlegersicht ist das Ereignis routine und von geringer Auswirkung: Es spiegelt eine übliche Vergütung des Direktors wider und stärkt die Ausrichtung zwischen Vorstandsmitglied und Aktionären leicht, ohne die Kapitalstruktur oder den Cashflow von Biogen zu beeinflussen.

Positive
  • Increased insider ownership: Director’s stake rose by 2,370 shares, aligning governance interests with shareholders.
Negative
  • None.

Insights

TL;DR: Director granted 2,370 free shares; no sales, minimal market impact.

The Form 4 shows Eric K. Rowinsky, a director, received 2,370 Biogen shares at a zero stated cost on 06/17/2025, raising his direct stake to 24,339 shares. The “A� code and $0 price point to a routine equity award, not an open-market purchase. There were no derivative positions reported. Such grants marginally improve insider alignment but do not signal a trading view or alter share count materially. For investors, the disclosure is informational rather than catalytic.

Biogen Inc. (BIIB) � Transazione interna Form 4

Il direttore Eric K. Rowinsky ha comunicato l'acquisto di 2.370 azioni ordinarie di Biogen il 17/06/2025. Il modulo riporta il codice transazione “A�, che indica che le azioni sono state acquisite e non vendute; il prezzo indicato è $0,00, suggerendo un premio azionario legato al consiglio di amministrazione o un simile riconoscimento basato su azioni. Dopo la transazione, la proprietà diretta di Rowinsky è salita a 24.339 azioni, rispetto alle 21.969 precedenti, con un aumento di circa l'11%.

Non sono stati segnalati strumenti derivati né disposizioni. Il modulo è stato firmato il 18/06/2025 da un procuratore legale.

Dal punto di vista dell'investimento, l'evento è ordinario e di scarso impatto: riflette una normale remunerazione del direttore e rafforza leggermente l'allineamento tra il membro del consiglio e gli azionisti senza influire sulla struttura del capitale o sui flussi di cassa di Biogen.

Biogen Inc. (BIIB) � Transacción interna Formulario 4

El director Eric K. Rowinsky reportó la adquisición de 2,370 acciones ordinarias de Biogen el 17/06/2025. El formulario indica el código de transacción “A�, lo que significa que las acciones fueron adquiridas y no vendidas; el precio declarado es $0.00, lo que sugiere una concesión de acciones relacionada con el consejo o una recompensa similar basada en acciones. Tras la transacción, la propiedad directa de Rowinsky aumentó a 24,339 acciones, desde 21,969, un incremento de aproximadamente el 11%.

No se reportaron valores derivados ni disposiciones. El formulario fue firmado el 18/06/2025 por un apoderado.

Desde una perspectiva de inversión, el evento es rutinario y de bajo impacto: refleja una compensación estándar para directores y alinea modestamente al miembro del consejo con los accionistas sin afectar la estructura de capital ni los flujos de efectivo de Biogen.

Biogen Inc. (BIIB) � 내부� 거래 신고� Form 4

이사 Eric K. Rowinsky2025� 6� 17�� Biogen 보통� 2,370�� 취득했다� 보고했습니다. 신고서에� 거래 코드 “A”갶� 기재되어 있어 주식� 매도하지 않고 취득� �임을 나타냅니�; 명시� 갶격은 $0.00으로, 이사� 관� 주식 부� 또는 유사� 주식 기반 보상� 의미합니�. 거래 � Rowinsky� 직접 보유 주식은 21,969주에� 24,339�� � 11% 증갶했습니�.

파생상품 증권이나 처분 내역은 없었으며, 신고서는 2025� 6� 18� 대리인� 서명했습니다.

투자 관점에� � 사건은 일상적이� 영향� 적은 사항으로, 이사� 표준 보상이며 이사� 구성원과 주주 간의 연계� 다소 강화하지� Biogen� 자본 구조� 현금 흐름에는 영향� 미치지 않습니다.

Biogen Inc. (BIIB) � Transaction d’initié Formulaire 4

Le directeur Eric K. Rowinsky a déclaré l’acquisition de 2 370 actions ordinaires de Biogen le 17/06/2025. Le formulaire indique le code de transaction « A », signifiant que les actions ont été achetées et non vendues ; le prix indiqué est de 0,00 $, ce qui suggère une attribution d’actions liée au conseil d’administration ou une récompense similaire basée sur des actions. Après la transaction, la détention directe de Rowinsky est passée à 24 339 actions, contre 21 969 auparavant, soit une augmentation d’environ 11 %.

Aucun instrument dérivé ni cession n’a été signalé. Le formulaire a été signé le 18/06/2025 par un mandataire.

Du point de vue de l’investissement, l’événement est routinier et à faible impact : il reflète une rémunération standard des administrateurs et renforce légèrement l’alignement entre le membre du conseil et les actionnaires sans affecter la structure du capital ou les flux de trésorerie de Biogen.

Biogen Inc. (BIIB) � Form 4 Insider-Transaktion

Direktor Eric K. Rowinsky meldete den Erwerb von 2.370 Aktien der Biogen-Stammaktien am 17.06.2025. Die Meldung enthält den Transaktionscode „A�, was darauf hinweist, dass die Aktien erworben und nicht verkauft wurden; der angegebene Preis beträgt 0,00 $, was auf eine aktienbasierte Zuwendung im Zusammenhang mit dem Vorstand oder eine ähnliche Aktienprämie hindeutet. Nach der Transaktion erhöhte sich Rowinskys direkte Beteiligung auf 24.339 Aktien, von zuvor 21.969 Aktien � eine Steigerung von etwa 11 %.

Es wurden keine Derivate gemeldet, und es gab keine Veräußerungen. Die Meldung wurde am 18.06.2025 von einem Bevollmächtigten unterschrieben.

Aus Anlegersicht ist das Ereignis routine und von geringer Auswirkung: Es spiegelt eine übliche Vergütung des Direktors wider und stärkt die Ausrichtung zwischen Vorstandsmitglied und Aktionären leicht, ohne die Kapitalstruktur oder den Cashflow von Biogen zu beeinflussen.

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*
Rowinsky Eric K

(Last) (First) (Middle)
BIOGEN INC.
225 BINNEY STREET

(Street)
CAMBRIDGE MA 02142

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
BIOGEN INC. [ BIIB ]
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 2,370 A $0 24,339 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:
/s/ Wendell Taylor, Attorney in Fact for Eric K. Rowinsky 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 Biogen (BIIB) shares did Director Eric K. Rowinsky acquire?

The Form 4 reports an acquisition of 2,370 common shares.

Was the transaction a purchase or an award?

The filing lists transaction code "A" and a $0.00 price, indicating an equity award rather than a market purchase.

What is Rowinsky’s total direct ownership after the transaction?

Following the award, he directly beneficially owns 24,339 Biogen shares.

Did the Form 4 include any sales or derivative security activity?

No. The filing shows no dispositions and no derivative securities were reported.

Does this insider transaction materially impact Biogen’s share count or earnings?

No. The award is immaterial relative to Biogen’s outstanding shares and has no effect on earnings or cash flow.
Biogen Inc

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