Flagship Pioneering, Llc
Institutional manager — quarterly 13F holdings, Q ending 2026-03-31
Reported value
$1.16B
Q ending 2026-03-31
Prior quarter
$324.0M
Q ending 2025-12-31
Change
+258.5% QoQ · +392.7% YoY
Positions
5
reported holdings
Largest positions
All 5 reported positions, Q ending 2026-03-31. A manager can hold shares, calls and puts on the same security at once — such positions are listed as separate rows. Type: Shares = common stock, Put/Call = option positions (valued at the underlying), Principal = debt. Tickers link to stock pages where covered.
Values as reported in public regulatory filings (USD); holdings are reported quarterly, up to 45 days after quarter end, and may contain reporting errors. Nothing here is investment advice.