Follow-The-Filings

Security

Day One Biopharmaceuticals I · COM

Equity holders as of 2026 Q1 (each manager’s latest book)

11 owners 2 new 1 exit max 0.4% (George Soros - Soros Fund...)

owners 11
max % 0.4%
tracked value $237M
qoq N 2 A 4 R 4 E 1

holders

sorted by % of portfolio · long equity only · exits show last held size

manager % port activity shares value history
George Soros - Soros Fund Management LLC 2026 Q1 0.4% New 0.4% 1,539,100 $33M hist
Dmitry Balyasny - Balyasny Asset Management L.P. 2026 Q1 0.1% Add +0.06 pp 2,625,235 $56M hist
Renaissance Technologies LLC 2026 Q1 0.0% Reduce +0.02 pp 1,296,984 $28M hist
Israel Englander - Millennium Management LLC 2026 Q1 0.0% Add +0.01 pp 1,927,557 $41M hist
Marshall Wace - Marshall Wace, LLP 2026 Q1 0.0% New 0.0% 328,638 $7M hist
Vanguard Group Inc. 2025 Q4 stale 0.0% Add 0.00 pp 6,282,376 $59M hist
Cliff Asness - Aqr Capital Management LLC 2026 Q1 0.0% Add 0.00 pp 444,467 $10M hist
Norges Bank 2025 Q4 stale 0.0% Exit 0.00 pp 169,000 $2M hist
Ken Fisher - Fisher Asset Management, LLC 2026 Q1 0.0% Reduce 0.00 pp 43,698 $937 hist
Steve Cohen - Point72 Asset Management, L.P. 2026 Q1 0.0% Reduce 0.00 pp 31,938 $685 hist
D. E. Shaw & Co., Inc. 2026 Q1 0.0% Reduce 0.00 pp 21,626 $464 hist
Ken Griffin - Citadel Advisors LLC exited 2026 Q1 last 2025 Q4 0.0% Exit 0.00 pp 1,359,613 $13M hist

ownership over time

filing count by report period · click a bar for that quarter’s holders