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DaveManuel.com · Institutional Ownership · Who Owns It

BOUNDLESS BIO INC COM (BOLD)

Institutional ownership reported to the SEC as of Q2 2026, across 16 quarters.

40
Reporting holders
$38.3M
Reported value
67.3%
Of shares outstanding
0.0%
Calls
0.0%
Puts
+4
Holder change

Institutions report 15,301,033 shares against 22,747,985 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.

Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.

Holders

Download these holders as CSV

FilerValueShares Their book Held Change
ARCH Venture Management, LLC$6.7M2,694,0950.61%newNEW
FMR LLC$6.5M2,581,0550.00%10q-4.2%-$286.0K
TANG CAPITAL MANAGEMENT LLC$6.4M2,559,8750.29%newNEW
ADAR1 Capital Management, LLC$4.9M1,968,2160.23%newNEW
Cormorant Asset Management, LP$2.5M1,000,0000.13%newNEW
VANGUARD CAPITAL MANAGEMENT LLC$1.5M614,9230.00%2q+3.0%+$44.3K
WELLINGTON MANAGEMENT GROUP LLP$1.4M556,2330.00%10qHELD
MILLENNIUM MANAGEMENT LLC$1.2M478,6390.00%5q+379.2%+$946.9K
RENAISSANCE TECHNOLOGIES LLC$1.2M471,5700.00%6q+18.2%+$181.4K
Alyeska Investment Group, L.P.$750.0K300,0000.00%10qHELD
Affinity Asset Advisors, LLC$625.0K250,0000.03%newNEW
RBF Capital, LLC$500.0K200,0000.02%5qHELD
Ensign Peak Advisors, Inc$399.6K159,8350.00%10q-14.8%-$69.2K
Stonepine Capital Management, LLC$386.5K154,5950.22%5q-74.1%-$1.1M
ACADIAN ASSET MANAGEMENT LLC$365.0K146,7570.00%7q+1063.8%+$333.6K
CITADEL ADVISORS LLC$362.6K145,0490.00%10q-89.2%-$3.0M
BRIDGEWAY CAPITAL MANAGEMENT, LLC$320.0K128,0000.01%5q+153.5%+$193.8K
GEODE CAPITAL MANAGEMENT, LLC$291.8K116,7360.00%9q-8.5%-$27.1K
HRT FINANCIAL LP$290.0K116,2880.00%newNEW
BlackRock, Inc.$221.2K88,4950.00%8q+25.2%+$44.6K
PRELUDE CAPITAL MANAGEMENT, LLC$210.0K83,9980.02%newNEW
Rangeley Capital, LLC$185.0K74,0000.17%newNEW
GSA CAPITAL PARTNERS LLP$181.0K72,3530.01%3q-25.3%-$61.2K
VANGUARD FIDUCIARY TRUST CO$162.8K65,1360.00%2qHELD
JANE STREET GROUP, LLC$160.8K64,3230.00%newNEW
SUPERSTRING CAPITAL MANAGEMENT LP$138.4K55,3560.09%newNEW
NORTHERN TRUST CORP$87.1K34,8240.00%newNEW
XTX Topco Ltd$83.4K33,3610.00%6q-3.8%-$3.3K
Qube Research & Technologies Ltd$50.5K20,2070.00%5q+15.5%+$6.8K
China Universal Asset Management Co., Ltd.$42.2K16,9000.00%newNEW
STATE STREET CORP$39.9K15,9620.00%9qHELD
MORGAN STANLEY$32.5K13,0000.00%9qHELD
Caitong International Asset Management Co., Ltd$26.1K10,4430.00%2q+348000.0%+$26.1K
Pure Financial Advisors, LLC$25.2K10,1000.00%2qHELD
Tower Research Capital LLC (TRC)$8703480.00%9q-85.3%-$5.1K
BNP PARIBAS FINANCIAL MARKETS$4401760.00%9q-1.1%
JPMORGAN CHASE & CO$4391790.00%3q+5.9%
Financial Management Professionals, Inc.$520.00%newNEW
UBS Group AG$520.00%9qHELD
SBI Securities Co., Ltd.$520.00%2q+100.0%

What the company announced

Form 8-K filings from the last 120 days, showing only the items worth a reader's attention. Earnings releases, exhibit attachments and general disclosures are filed constantly and are left out. Filed is when the SEC received it; event is the date the company says the thing happened.

FiledEvent dateWhatSource
2026-08-282026-08-28Material agreement enteredfiling

What the insiders did

Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.

Ten percent owners and entities

Usually an institution that crossed a reporting threshold, or a company taking a strategic stake, rather than an individual with a view.

DateInsiderRoleSideSharesValue
2026-06-25TANG KEVIN10% ownerBought146,390$363.1K ×2
2026-10-16TANG KEVIN10% ownerBought118,185$276.6K
2026-06-26TANG KEVIN10% ownerBought75,181$191.7K ×2
2026-07-01TANG KEVIN10% ownerBought71,612$178.3K
2026-06-29TANG KEVIN10% ownerBought64,762$160.0K ×2
2026-07-13TANG KEVIN10% ownerBought48,211$116.7K

Quarter by quarter

Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.

QuarterHoldersValue SharesNewAdded TrimmedOptions
Q3 20263$617.8K241,4720110.0%
Q2 202640$38.3M15,301,033131090.0%
Q1 202636$9.3M8,485,82355100.0%
Q4 202535$10.8M8,980,93651070.0%
Q3 202534$11.9M9,708,13317130.0%
Q2 202543$9.9M9,787,225116180.0%
Q1 202552$19.6M13,012,498811150.0%
Q4 202454$37.6M12,962,44882730.0%
Q3 202454$46.1M13,285,5141111140.0%
Q2 202447$53.5M13,844,899201280.0%
Q1 202443$208.8M14,582,56342000.0%
Q4 2019187$26.7B445,386,8598144410.4%
Q3 2019145$48.9B1,741,921,5911959350.0%
Q2 2019143$66.2B1,749,556,0343061320.0%
Q1 2019138$34.1B875,526,2962747390.0%
Q4 2018123$26.8B1,259,217,1972600.0%