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Disclosery

BIIB BIOGEN INC

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Stock (common), issuer CIK 875045

851 managers (868 13F filers) reported a position in BIIB shares at 2025-06-30, 130,117,541 shares in all. 81 filers opened a position and 101 filers sold out during the quarter.

Managers
851
13F filers
868
New
81
Added
343
Reduced
265
Sold out
101
Shares held by filers
130,117,541

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2025

Filers in the available 13F reports with a share position at 2025-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Darwin Wealth Management, LLC16$2.01K<0.01%013F-HRTimeline
Fortis Group Advisors, LLC15$1.88K<0.01%013F-HRTimeline
Accredited Wealth Management, LLC15$1.88K<0.01%013F-HRTimeline
Stone House Investment Management, LLC14$1.76K<0.01%-1513F-HRTimeline
NVWM, LLC14$1.76K<0.01%+113F-HRTimeline
HOLLENCREST CAPITAL MANAGEMENT13$1.63K<0.01%013F-HRTimeline
New England Capital Financial Advisors …13$1.63K<0.01%013F-HRTimeline
Park Place Capital Corp11$1.43K<0.01%013F-HRTimeline
Bernard Wealth Management Corp.11$1.38K<0.01%013F-HRTimeline
1 NORTH WEALTH SERVICES LLC10$1.26K<0.01%013F-HRTimeline
Strategic Investment Solutions, Inc. /IL10$1.26K<0.01%013F-HRTimeline
KAYNE ANDERSON RUDNICK INVESTMENT MANAG…9$1.13K<0.01%new13F-HRTimeline
AdvisorNet Financial, Inc9$1.13K<0.01%-613F-HRTimeline
Cape Investment Advisory, Inc.9$1.13K<0.01%+213F-HRTimeline
Wealth Preservation Advisors, LLC9$1.13K<0.01%013F-HRTimeline
IMG Wealth Management, Inc.9$1.13K<0.01%new13F-HRTimeline
American Capital Advisory, LLC8$1.01K<0.01%+613F-HRTimeline
EVOLUTION WEALTH MANAGEMENT INC.8$1K<0.01%13F-HRTimeline
SIERRA OCEAN, LLC8$1K<0.01%-3113F-HRTimeline
Penserra Capital Management LLCin group Penserra Capital Management L…12$1K<0.01%013F-HRTimelineGroup
HAZLETT, BURT & WATSON, INC.10$1K<0.01%new13F-HRTimeline
WealthTrak Capital Management LLC7$880<0.01%-113F-HRTimeline
Clark Wealth Partners7$879<0.01%new13F-HRTimeline
ALBION FINANCIAL GROUP /UT6$754<0.01%013F-HRTimeline
WestEnd Advisors, LLC6$754<0.01%013F-HRTimeline
Quaker Wealth Management, LLC6$754<0.01%new13F-HRTimeline
Fairman Group, LLC6$754<0.01%013F-HRTimeline
LRI Investments, LLC6$754<0.01%013F-HRTimeline
Parkworth Wealth Management, Inc.6$754<0.01%new13F-HRTimeline
Rialto Wealth Management, LLC6$754<0.01%-1013F-HRTimeline
ATWOOD & PALMER INC5$628<0.01%013F-HRTimeline
EVERMAY WEALTH MANAGEMENT LLC5$628<0.01%013F-HRTimeline
JFS WEALTH ADVISORS, LLC5$628<0.01%+213F-HRTimeline
WOLFF WIESE MAGANA LLC5$628<0.01%-1113F-HRTimeline
Dunhill Financial, LLC4$627<0.01%-613F-HRTimeline
Riggs Asset Managment Co. Inc.4$503<0.01%new13F-HRTimeline
Stephens Consulting, LLC4$503<0.01%new13F-HRTimeline
DecisionPoint Financial, LLC3$391<0.01%new13F-HRTimeline
WPG Advisers, LLC3$377<0.01%013F-HRTimeline
DiNuzzo Private Wealth, Inc.2$252<0.01%-3013F-HRTimeline
Ancora Advisors LLCin group Ancora Advisors LLC2$251<0.01%new13F-HRTimelineGroup
CURIO WEALTH, LLC2$251<0.01%+113F-HRTimeline
HFM Investment Advisors, LLC2$251<0.01%+113F-HRTimeline
CREATIVE FINANCIAL DESIGNS INC /ADV1$126<0.01%new13F-HRTimeline
TFC Financial Management, Inc.1$126<0.01%new13F-HRTimeline
Valued Wealth Advisors LLC1$126<0.01%013F-HRTimeline
ROSS\JOHNSON & Associates LLC1$126<0.01%013F-HRTimeline
Bay Harbor Wealth Management, LLC1$125<0.01%new13F-HRTimeline
Quest 10 Wealth Builders, Inc.1$98<0.01%013F-HRTimeline
West Oak Capital, LLC45$57<0.01%013F-HRTimeline
CONCOURSE FINANCIAL GROUP SECURITIES, I…0$0013F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.