Boundless BIO Inc (BOLD)

CUSIP: 10170A100 | NYSE | Healthcare · Biotechnology | Micro Cap | 119 institutional holders

Compare Detailed Historical Funds Options 13D/13G Peers Targeting Trading Summary Profile

Beneficial Ownership — 13D / 13G

5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.

Holder	Shares	% of Class	Change	Event Date	vs 13F
13GAdar1 Capital Management, LLC	1,968,216	8.8%	New 5%+ stake	Jun 30, 2026	No 13F filer matched
13G/ACitadel Securities Group LP with Citadel Securities LLC, Citadel GP LLC, Citadel Advisors LLC, +1 more

Institutional Holders — Q3 2026

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China Universal Asset Management Co., Ltd.233,300

0.0% of portfolio$597.2K

Caitong International Asset Management Co., Ltd8,170

0.0% of portfolio$20.5K

SBI Securities Co., Ltd.2

0.0% of portfolio$5

				Style	Turnover	Location	Filed
China Universal Asset Management Co., Ltd.	233,300	$597.2K	0.0%	Growth	Medium	Shanghai, France	2026-10-28
Caitong International Asset Management Co., Ltd	8,170	$20.5K	0.0%	Growth	Very High	Hong Kong, South Korea	2026-10-29
SBI Securities Co., Ltd.	2	$5	0.0%	Agg Growth	Low	Tokyo, Mexico	2026-10-22

13GAdar1 Capital Management, LLC1,968,216

8.8% of class · Jun 30, 2026New 5%+ stake

No 13F filer matched

13G/ACitadel Securities Group LP145,118

0.6% of class · Jun 30, 2026Newly reported

with Citadel Securities LLC, Citadel GP LLC, Citadel Advisors LLC, +1 more

No 13F filer matched

13GZachary Hornby2,426,857

9.8% of class · Oct 14, 2025New 5%+ stake

No 13F filer matched