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Public ownership evidence

Boundless Bio, Inc. Common Stock (BOLD) Ownership Disclosures

Read BOLD insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-11-07T14:03:26.246Z

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2026-11-052026-11-05TANG CAPITAL MANAGEMENT LLC, TANG KEVINP8,390Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-11-05 and its public availability date is 2026-11-05. Subtracting those calendar dates gives 0 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code P: a purchase. A purchase code is only one eligibility check. Confirm reporting-owner role, amendment lineage and coverage before treating it as a strategy input.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC 0001178579-26-000023 ↗SEC 0001178579-26-000023 ↗SEC 0001178579-26-000023 ↗

Recent Form 4 activity

Inspect all 12 displayed rows: Recent Form 4 activity

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2026-11-052026-11-05TANG CAPITAL MANAGEMENT LLC, TANG KEVINP8,390Not reported
2026-11-052026-11-04TANG CAPITAL MANAGEMENT LLC, TANG KEVINP517Not reported
2026-11-052026-11-03TANG CAPITAL MANAGEMENT LLC, TANG KEVINP2,255Not reported
2026-10-292026-10-27TANG CAPITAL MANAGEMENT LLC, TANG KEVINP10,707Not reported
2026-10-262026-10-26TANG CAPITAL MANAGEMENT LLC, TANG KEVINP9,606Not reported
2026-10-262026-10-23TANG CAPITAL MANAGEMENT LLC, TANG KEVINP6,234Not reported
2026-10-262026-10-22TANG CAPITAL MANAGEMENT LLC, TANG KEVINP5,800Not reported
2026-10-202026-10-20TANG CAPITAL MANAGEMENT LLC, TANG KEVINP220Not reported
2026-10-202026-10-19TANG CAPITAL MANAGEMENT LLC, TANG KEVINP18,279Not reported
2026-10-202026-10-19TANG CAPITAL MANAGEMENT LLC, TANG KEVINP12,790Not reported
2026-10-202026-10-16TANG CAPITAL MANAGEMENT LLC, TANG KEVINP118,185Not reported
2026-08-292026-08-26TANG CAPITAL MANAGEMENT LLC, TANG KEVINS18,300Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 43 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Ensign Peak Advisors, Inc2026-03-312026-08-19187,500$206,250None
Ensign Peak Advisors, Inc2025-12-312026-08-19187,500$225,000None
Ensign Peak Advisors, Inc2025-09-302026-08-19187,500$230,625None
Pure Financial Advisors, LLC2026-06-302026-08-1810,100$25,250None
Stonepine Capital Management, LLC2026-06-302026-08-18154,595$386,488None
ADAR1 Capital Management, LLC2026-06-302026-08-151,968,216$4,920,540None
SUPERSTRING CAPITAL MANAGEMENT LP2026-06-302026-08-1555,356$138,390None
Rangeley Capital, LLC2026-06-302026-08-1574,000$185,000None
XTX Topco Ltd2026-06-302026-08-1533,361$83,403None
Qube Research & Technologies Ltd2026-06-302026-08-1520,207$50,518None
JANE STREET GROUP, LLC2026-06-302026-08-1518,453$46,132None
JANE STREET GROUP, LLC2026-06-302026-08-1545,870$114,675None
Cormorant Asset Management, LP2026-06-302026-08-151,000,000$2,500,000None
HRT FINANCIAL LP2026-06-302026-08-15116,288$290,000None
Ensign Peak Advisors, Inc2026-06-302026-08-15159,835$399,588None
Stonepine Capital Management, LLC2026-06-302026-08-15154,595$386,488None
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-15478,639$1,196,598None
TANG CAPITAL MANAGEMENT LLC2026-06-302026-08-152,559,875$6,399,688None
Alyeska Investment Group, L.P.2026-06-302026-08-15300,000$750,000None
BRIDGEWAY CAPITAL MANAGEMENT, LLC2026-06-302026-08-15128,000$320,000None
CITADEL ADVISORS LLC2026-06-302026-08-15145,049$362,623None
RBF Capital, LLC2026-06-302026-08-15200,000$500,000None
ARCH Venture Management, LLC2026-06-302026-08-152,694,095$6,735,238None
PRELUDE CAPITAL MANAGEMENT, LLC2026-06-302026-08-1583,998$209,995None
WELLINGTON MANAGEMENT GROUP LLP2026-06-302026-08-15556,233$1,390,583None
VANGUARD CAPITAL MANAGEMENT LLC2026-06-302026-08-14614,923$1,537,308None
UBS Group AG2026-06-302026-08-142$5None
BNP PARIBAS FINANCIAL MARKETS2026-06-302026-08-14176$440None
ACADIAN ASSET MANAGEMENT LLC2026-06-302026-08-14146,757$365,000None
RENAISSANCE TECHNOLOGIES LLC2026-06-302026-08-14471,570$1,178,925None
Affinity Asset Advisors, LLC2026-06-302026-08-14250,000$625,000None
VANGUARD FIDUCIARY TRUST CO2026-06-302026-08-1465,136$162,840None
MORGAN STANLEY2026-06-302026-08-1413,000$32,500None
FMR LLC2026-06-302026-08-144,992$12,480None
FMR LLC2026-06-302026-08-141,243,083$3,107,708None
FMR LLC2026-06-302026-08-141,332,980$3,332,450None
NORTHERN TRUST CORP2026-06-302026-08-1434,824$87,060None
GEODE CAPITAL MANAGEMENT, LLC2026-06-302026-08-1320,683$51,707None
GEODE CAPITAL MANAGEMENT, LLC2026-06-302026-08-1396,053$240,132None
JPMORGAN CHASE & CO2026-06-302026-08-13169$414None
JPMORGAN CHASE & CO2026-06-302026-08-1310$25None
Tower Research Capital LLC (TRC)2026-06-302026-08-12348$870None
MERCER GLOBAL ADVISORS INC /ADV2026-06-302026-08-1250$125None

90-day public filing window, up to 50 source positions.

Ensign Peak Advisors, Inc ↗Ensign Peak Advisors, Inc ↗Ensign Peak Advisors, Inc ↗Pure Financial Advisors, LLC ↗Stonepine Capital Management, LLC ↗ADAR1 Capital Management, LLC ↗SUPERSTRING CAPITAL MANAGEMENT LP ↗Rangeley Capital, LLC ↗XTX Topco Ltd ↗Qube Research & Technologies Ltd ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.