Boundless Bio Inc

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Boundless Bio Inc
TickerBOLD
CIK #0001782303
CUSIP10170A100
SectorLife Sciences - Pharmaceutical Preparations
Address9880 Campus Point Drive Suite 120, San Diego, CA 92121
Source [EDGAR]
CIK Filing 2011 - 2025
[0001782303] 10-K
[0001782303] 10-Q
[0001782303] 3
[0001782303] 4
[0001782303] 8-K
[0001782303] D
[0001782303] SC 13D
[0001782303] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Arch Venture Fund IX LP Boundless Bio Inc [2024-10-29] 12.1
RA Capital Management LP Boundless Bio Inc [2024-04-12] 0.8
Nextech VI GP SARL Boundless Bio Inc [2024-04-12] 5.5
FMR LLC Boundless Bio Inc [2024-04-10] 0.0
Bayer Healthcare LLC Boundless Bio Inc [2024-04-09] 7.3
Form 3/4/5 Filer 2011 - 2025
Boundless Bio, Inc.
Whiting Nancy
Brennan Christine
Christensen James
Lew Jennifer
Lim Jonathan E
Burow Kristina
Doebele Robert
Oien Jessica
Hinkle David A
Hassig Christian
Hornby Zachary
Rubin Jami
Abdollahian Neil
Wagner Klaus W.
Crandell Keith
Gillis Steven
Nelsen Robert
Bybee Clinton
ARCH Venture Fund X Overage, L.P.
ARCH Venture Partners X, LLC
ARCH Venture Partners IX Overage, L.P.
ARCH Venture Partners IX, L.P.
ARCH Venture Fund IX, L.P.
ARCH Venture Partners X Overage, L.P.
ARCH Venture Partners IX, LLC
ARCH Venture Fund IX Overage, L.P.
RA Capital Management LP
Kolchinsky Peter
RA Capital Healthcare Fund LP
RA Capital Nexus Fund II, L.P.
Shah Rajeev M.
Wellington Biomedical Innovation Master Investors (Cayman) I
Form 13F Holdings
Firm Period DFND Voting Shares
FMR LLC [2025-06-30] DFND 3,117,047 3,125,103
Nextech Invest Ltd [2025-06-30] SOLE 1,228,069 1,228,069
Citadel Advisors LLC [2025-06-30] DFND 830,936 830,936
Sectoral Asset Management Inc [2025-06-30] SOLE 678,574 678,574
Redmile Group LLC [2025-06-30] SOLE 589,034 589,034
Wellington Management Group LLP [2025-06-30] DFND 0 556,233
Vanguard Group Inc [2025-06-30] SOLE 0 480,838
Alyeska Investment Group LP [2025-06-30] SOLE 300,000 300,000
Almitas Capital LLC [2025-06-30] SOLE 235,505 235,505
Millennium Management LLC [2025-06-30] SOLE 213,561 213,561
Northern Trust Corp [2025-06-30] DFND 207,500 207,500
RBF Capital, LLC [2025-06-30] SOLE 200,000 200,000
Ensign Peak Advisors, Inc [2025-06-30] SOLE 187,500 187,500
SIO Capital Management LLC [2025-06-30] SOLE 163,679 163,679
Renaissance Technologies LLC [2025-06-30] SOLE 121,000 121,000
Stonepine Capital Management LLC [2025-06-30] SOLE 106,175 106,175
Goldman Sachs Group Inc [2025-06-30] DFND 70,304 70,304
BlackRock, Inc. [2025-06-30] SOLE 64,258 64,258
Geode Capital Management LLC [2025-06-30] DFND 58,903 58,903
Y-Intercept (Hong Kong) Ltd [2025-06-30] SOLE 55,242 55,242
Bridgeway Capital Management LLC [2025-06-30] SOLE 50,500 50,500
XTX Topco Ltd [2025-06-30] DFND 40,064 40,064
Walleye Capital LLC [2025-06-30] SOLE 39,624 39,624
Susquehanna International Group LLP [2025-06-30] OTR 32,211 32,211
HRT Financial LP [2025-06-30] DFND 27,509 27,509
Qube Research & Technologies Ltd [2025-06-30] SOLE 21,542 21,542
Squarepoint Ops LLC [2025-06-30] DFND 0 18,399
Morgan Stanley [2025-06-30] DFND 2,239 16,739
State Street Corp [2025-06-30] DFND 15,962 15,962
Abel Hall LLC [2025-06-30] SOLE 0 14,399
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