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Disclosery

BOLD BOUNDLESS BIO INC

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COM (common), issuer CIK 1782303

39 managers (40 13F filers) reported a position in BOLD shares at 2026-06-30, 15,301,033 shares in all. 13 filers opened a position and 8 filers sold out during the quarter.

Managers
39
13F filers
40
New
13
Added
10
Reduced
9
Sold out
8
Shares held by filers
15,301,033

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
ARCH Venture Management, LLC2,694,095$6.74M0.61%new13F-HRTimeline
FMR LLCin group FMR LLC2,581,055$6.45M<0.01%-114,40013F-HRTimelineGroup
TANG CAPITAL MANAGEMENT LLCin group TANG CAPITAL MANAGEMENT LLC2,559,875$6.4M0.29%new13F-HRTimelineGroup
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC1,968,216$4.92M0.23%new13F-HRTimelineGroup
Cormorant Asset Management, LP1,000,000$2.5M0.13%new13F-HRTimeline
VANGUARD GROUP INCgroup of 3 filers holding680,059$1.7M+17,302Timeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…556,233$1.39M<0.01%013F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC478,639$1.2M<0.01%+378,76413F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC471,570$1.18M<0.01%+72,57013F-HRTimeline
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.300,000$750K<0.01%013F-HRTimelineGroup
Affinity Asset Advisors, LLC250,000$625K0.03%new13F-HRTimeline
RBF Capital, LLC200,000$500K0.02%013F-HRTimeline
Ensign Peak Advisors, Inc159,835$400K<0.01%-27,66513F-HRTimeline
Stonepine Capital Management, LLC154,595$386K0.29%-443,08713F-HR/ATimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC146,757$365K<0.01%+134,14713F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC145,049$363K<0.01%-1,197,08213F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC128,000$320K0.01%+77,50013F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC116,736$292K<0.01%-10,84013F-HRTimelineGroup
HRT FINANCIAL LP116,288$290K<0.01%new13F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.88,495$221K<0.01%+17,82013F-HRTimelineGroup
PRELUDE CAPITAL MANAGEMENT, LLC83,998$210K0.02%new13F-HRTimeline
Rangeley Capital, LLC74,000$185K0.17%new13F-HRTimeline
GSA CAPITAL PARTNERS LLP72,353$181K0.01%-24,47113F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC64,323$161K<0.01%new13F-HRTimelineGroup
SUPERSTRING CAPITAL MANAGEMENT LP55,356$138K0.09%new13F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP34,824$87.1K<0.01%new13F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd33,361$83.4K<0.01%-1,31013F-HRTimelineGroup
Qube Research & Technologies Ltd20,207$50.5K<0.01%+2,71513F-HRTimeline
China Universal Asset Management Co., L…16,900$42.2K<0.01%new13F-HRTimeline
STATE STREET CORPin group STATE STREET CORP15,962$39.9K<0.01%013F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY13,000$32.5K<0.01%013F-HRTimelineGroup
Caitong International Asset Management …10,443$26.1K<0.01%+10,44013F-HRTimeline
Pure Financial Advisors, LLC10,100$25.2K<0.01%013F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…348$870<0.01%-2,02313F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS176$440<0.01%-213F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO179$439<0.01%+1013F-HRTimelineGroup
Financial Management Professionals, Inc.2$5<0.01%new13F-HRTimeline
UBS Group AGin group UBS Group AG2$5<0.01%013F-HRTimelineGroup
SBI Securities Co., Ltd.2$5<0.01%+113F-HRTimeline