13F

Stock

Biogen Inc.

BIIB · held by 16 managers

Reported value

$550.5M

Holders

16

+1 new · −0 exited

Holders’ est. mark

−$28.2M

Price effect on 11 books still in the name

Largest holder

$294.7M

NORGES BANK

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
NORGES BANK2.15M$294.7MHeld
BARCLAYS PLC918.4K$125.7M−$13.5MCut−$2.53M
Employees Provident Fund Board704.2K$96.4M−$11.3MCut−$11.3M
Leonteq Securities AG81.7K$11.1M−$1.4MCut−$6.41M
DANSKE BANK A/S63.9K$8.75M−$1.03MCut−$3.45M
Swiss Life Asset Management Ltd58.8K$8.04M−$829.4KAdded$120.4K
OP Asset Management Ltd20K$2.74MHeld
ONTARIO TEACHERS PENSION PLAN BOARD10.8K$1.48MNew
Savant Capital, LLC3.26K$446KHeld
Marex Group plc3.08K$421.6K−$49.5KCut−$724.1K
Ramiah Investment Group3.07K$420.5K−$40.1KAdded$39.1K
Sanctuary Advisors, LLC2.24K$306.4KHeld
Aventura Private Wealth, LLC540$73.9K−$8.68KCut−$17.7K
Medallion Wealth Advisors, LLC115$15.7K$0Held
BROADWATER CAPITAL MANAGEMENT LLC100$13.7K−$1.61KCut−$1.61K
Prestige Wealth Management Group LLC35$4.79K−$563Cut−$563

Positions as of Q1 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.