SEC FORM 3SEC Form 3
| FORM 3 | UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES
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: | 3235-0104 | | Estimated average burden | | hours per response: | 0.5 |
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1. Name and Address of Reporting Person*
(Street)
| 2. Date of Event Requiring Statement
(Month/Day/Year)
08/03/2026 | 3. Issuer Name and Ticker or Trading Symbol
BIOGEN INC.
[ BIIB ]
Foreign Trading Symbol
|
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable) | Director | | 10% Owner |  | Officer (give title below) | | Other (specify below) | | Chief Legal Officer |
| 5. If Amendment, Date of Original Filed
(Month/Day/Year)
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6. Individual or Joint/Group Filing (Check Applicable Line)
| Form filed by One Reporting Person | | Form filed by More than One Reporting Person |
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| Table I - Non-Derivative Securities Beneficially Owned |
|---|
| 1. Title of Security (Instr.
4)
| 2.
Amount of Securities Beneficially Owned (Instr.
4)
| 3. Ownership Form: Direct (D) or Indirect (I) (Instr.
5)
| 4. Nature of Indirect Beneficial Ownership (Instr.
5)
|
|---|
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities) |
|---|
| 1. Title of Derivative Security (Instr.
4)
| 2. Date Exercisable and Expiration Date
(Month/Day/Year) | 3. Title and Amount of Securities Underlying Derivative Security (Instr.
4)
| 4. Conversion or Exercise Price of Derivative Security
| 5. Ownership Form: Direct (D) or Indirect (I) (Instr.
5)
| 6. Nature of Indirect Beneficial Ownership (Instr.
5)
|
|---|
| Date Exercisable | Expiration Date | Title | Amount or Number of Shares |
|---|
| Explanation of Responses: |
| Remarks: |
|
| No securities are beneficially owned. |
| /s/ Wendell Taylor, attorney-in-fact for Mr. Parini | 08/12/2026 |
| ** 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
5
(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. |
LIMITED POWER OF ATTORNEY FOR
SECTION 16 REPORTING OBLIGATIONS
Know all by these presents, that the undersigned hereby makes, constitutes and
appoints Wendell Taylor and Bryan Keighery as the undersigned's true and lawful
attorney-in-fact, with full power and authority as hereinafter described on
behalf of and in the name, place and stead of the undersigned to: (1) prepare,
execute in the undersigned?s name and on the undersigned?s behalf, and submit
to the U.S. Securities and Exchange Commission (the ?SEC?) a Form ID, including
amendments thereto, and any other documents necessary or appropriate to obtain
codes and passwords enabling the undersigned to make electronic filings with
the SEC of reports required by Section 16(a) of the Securities Exchange Act of
1934 and the rules and regulations promulgated thereunder, as amended from time
to time (the ?Exchange Act?), or any rule or regulation of the SEC;
(2) prepare, execute, acknowledge, deliver and file Forms 3, 4, and 5
(including any amendments thereto) with respect to the securities of Biogen
Inc., a Delaware corporation (the ?Company?), with the SEC, any national
securities exchanges and the Company, as considered necessary or advisable
under Section 16(a) of the Exchange Act; (3) seek or obtain, as the
undersigned?s representative and on the undersigned?s behalf, information on
transactions in the Company?s securities from any third party, including
brokers, employee benefit plan administrators and trustees, and the undersigned
hereby authorizes any such person to release any such information to the
undersigned and approves and ratifies any such release of information; and
(4) perform any and all other acts which in the discretion of such
attorney-in-fact are necessary or desirable for and on behalf of the
undersigned in connection with the foregoing. The undersigned acknowledges
that: (A) this Limited Power of Attorney authorizes, but does not require, such
attorney-in-fact to act in their discretion on information provided to such
attorney-in-fact without independent verification of such information; (B) any
documents prepared and/or executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Limited Power of Attorney will be in such form and
will contain such information and disclosure as such attorney-in-fact, in his
or her discretion, deems necessary or desirable; (C) neither the Company nor
such attorney-in-fact assumes (i) any liability for the undersigned?s
responsibility to comply with the requirement of the Exchange Act, (ii) any
liability of the undersigned for any failure to comply with such requirements,
or (iii) any obligation or liability of the undersigned for profit disgorgement
under Section 16(b) of the Exchange Act; and (D) this Limited Power of Attorney
does not relieve the undersigned from responsibility for compliance with the
undersigned?s obligations under the Exchange Act, including without limitation
the reporting requirements under Section 16 of the Exchange Act. The
undersigned hereby gives and grants the foregoing attorney-in-fact full power
and authority to do and perform all and every act and thing whatsoever
requisite, necessary or appropriate to be done in and about the foregoing
matters as fully to all intents and purposes as the undersigned might or could
do if present, hereby ratifying all that such attorney-in-fact of, for and on
behalf of the undersigned, shall lawfully do or cause to be done by virtue of
this Limited Power of Attorney. This Limited Power of Attorney shall remain in
full force and effect until revoked by the undersigned in a signed writing
delivered to such attorney-in-fact. This Power of Attorney revokes all previous
powers of attorney with respect to the subject matter of this Power of
Attorney. IN WITNESS WHEREOF, the undersigned has caused this Limited Power of
Attorney to be executed as of this 11th day of August, 2026. /s/ Michael
Parini Name: Michael Parini
