BIOGEN INC. Insider Trading Activity

Biogen Inc. executive Ginger Gregory, EVP of Human Resources, reported multiple equity award transactions dated 02/06/2026.

Accepted by SEC EDGAR 02/10/2026 - 04:58 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Biogen Inc. executive Ginger Gregory, EVP of Human Resources, reported multiple equity award transactions dated 02/06/2026. The filing shows restricted stock units converting into common stock at an exercise price of $0 and related dispositions of common shares at $201.18 per share.

Individual conversions include 1,635, 1,802, and 3,746 restricted stock units, each linked to previously granted awards scheduled to vest in three equal annual installments beginning one year after their respective grant dates in 2023, 2024, and 2025. Following these transactions, Gregory directly holds 22,358.7673 shares of Biogen common stock and 7,494 restricted stock units.

Insider Trade Summary

7,183 shares exercised/converted

Exercise 9 txns

Insider Gregory Ginger

Role EVP, Human Resources

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit	1,635	$0.00	$0.00
Exercise	Restricted Stock Unit	1,802	$0.00	$0.00
Exercise	Restricted Stock Unit	3,746	$0.00	$0.00
Exercise	Common Stock	1,635	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	791	$201.18	$159K
Exercise	Common Stock	1,802	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	666	$201.18	$134K
Exercise	Common Stock	3,746	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	1,132	$201.18	$228K

Holdings After Transaction: Restricted Stock Unit — 9,296 contracts (Direct); Common Stock — 22,358.7673 shares (Direct)

Holdings Before and After: Restricted Stock Unit, 16,479 to 9,296 contracts (Direct); Common Stock, 17,764.7673 to 22,358.7673 shares (Direct)

Footnotes (4)

1. F1. Includes 166.6667 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2025.
2. F2. The restricted stock units vest in three (3) equal annual installments commencing one year after the grant date of 02/08/2023.
3. F3. The restricted stock units vest in three (3) equal annual installments, commencing one year after the grant date of 02/07/2024.
4. F4. The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 6, 2025.

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Form 4 Insider Transactions: What Each Field Means →

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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^*

Gregory Ginger

(Last) (First) (Middle)

BIOGEN INC.

225 BINNEY ST.

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, Human Resources

3. Date of Earliest Transaction (Month/Day/Year)
02/06/2026

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	02/06/2026		M		1,635	A	$0	19,399.7673(1)	D
Common Stock	02/06/2026		F		791	D	$201.18	18,608.7673	D
Common Stock	02/06/2026		M		1,802	A	$0	20,410.7673	D
Common Stock	02/06/2026		F		666	D	$201.18	19,744.7673	D
Common Stock	02/06/2026		M		3,746	A	$0	23,490.7673	D
Common Stock	02/06/2026		F		1,132	D	$201.18	22,358.7673	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
Restricted Stock Unit	$0	02/06/2026		M			1,635	(2)	02/08/2026	Common Stock	1,635	$0	0	D
Restricted Stock Unit	$0	02/06/2026		M			1,802	(3)	02/07/2027	Common Stock	1,802	$0	1,802	D
Restricted Stock Unit	$0	02/06/2026		M			3,746	(4)	02/06/2028	Common Stock	3,746	$0	7,494	D

Explanation of Responses:

1. Includes 166.6667 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2025.

2. The restricted stock units vest in three (3) equal annual installments commencing one year after the grant date of 02/08/2023.

3. The restricted stock units vest in three (3) equal annual installments, commencing one year after the grant date of 02/07/2024.

4. The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 6, 2025.

	/s/ Wendell Taylor, attorney in fact for Ginger Gregory	02/10/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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