13F

Stock

Biogen Inc.

BIIB · held by 18 managers

Reported value

$235M

Holders

18

+2 new · −1 exited

Holders’ est. mark

−$19.4M

Price effect on 13 books still in the name

Largest holder

$100.2M

BARCLAYS PLC

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
BARCLAYS PLC797.7K$100.2M−$8.97MCut−$25.5M
Employees Provident Fund Board704.2K$88.4M−$7.92MCut−$7.92M
Leonteq Securities AG108.9K$13.7M−$827.2KAdded$2.59M
Cresset Asset Management, LLC86K$10.8MHeld
Swiss Life Asset Management Ltd62.4K$7.84M−$661KCut−$201.7K
DANSKE BANK A/S55.4K$6.96M−$623.2KCut−$1.79M
OP Asset Management Ltd20.8K$2.62M−$225.4KCut−$123.6K
PEAK6 LLC17.3K$2.17MHeld
ONTARIO TEACHERS PENSION PLAN BOARD5.79K$726.7K−$65.1KCut−$757.9K
Essential Partners LLC5.34K$671.3KHeld
Sanctuary Advisors, LLC3.18K$399.5K−$25.2KAdded$93.1K
Savant Capital, LLC3.01K$377.9K−$33.9KCut−$68.1K
Aventura Private Wealth, LLC402$50.5K−$4.52KCut−$23.4K
ELEVATION POINT WEALTH PARTNERS, LLC200$25.1KNew
Medallion Wealth Advisors, LLC115$14.4K−$1.29KCut−$1.29K
BROADWATER CAPITAL MANAGEMENT LLC12.6K$12.6K−$13.6KCut−$1.13K
Prestige Wealth Management Group LLC38$4.77K−$394Cut−$17
Clark Wealth Partners7$879New

Who left

Positions as of Q2 2025. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.