Boundless Bio, Inc. (BOLD) Insider Trading
Over the last 3 months, BOLD insiders made 6 open-market buys and 0 sales, a net purchase of $715K (SEC Form 4). Over the last 6 months, 20 institutions increased and 21 reduced their position (13F).
Insider Activity
Sentiment
100/100
Buys (3m)
6
Sells (3m)
0
Net (3m)
$714.8K
Insiders buying
Insider trades by month Buys Sells
Sep
Oct
Feb
Aug
Nov
Jun
Context3-month price +127.3%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 29, 2026 | TANG KEVIN10 percent owner | Buy | 510 | $2.56 |
| Jun 29, 2026 | TANG KEVIN10 percent owner | Buy | 63,985 | $2.47 |
| Jun 29, 2026 | TANG KEVIN10 percent owner | Buy | 777 | $2.48 |
| Jun 29, 2026 | TANG KEVIN10 percent owner | Buy | 145,880 | $2.48 |
| Jun 29, 2026 | TANG KEVIN10 percent owner | Buy | 75,047 | $2.55 |
| Jun 29, 2026 | TANG KEVIN10 percent owner | Buy | 134 | $2.54 |
| Jun 15, 2026 | Lim Jonathan Edirector | Grant | 48,000 | $1.40 |
| Jun 15, 2026 | Whiting Nancydirector | Grant | 32,000 | $1.40 |
| Jun 15, 2026 | Lew Jenniferdirector | Grant | 32,000 | $1.40 |
| Jun 15, 2026 | Christensen Jamesdirector | Grant | 32,000 | $1.40 |
| Jan 26, 2026 | Hornby Zacharydirector, officer: President & CEO | Grant | 600,000 | $1.26 |
| Jan 26, 2026 | Hassig Christianofficer: Chief Scientific Officer | Grant | 230,000 | $1.26 |
| Jan 26, 2026 | Oien Jessicaofficer: See Remarks | Grant | 220,000 | $1.26 |
| Jan 26, 2026 | HINKLE DAVID Aofficer: See Remarks | Grant | 140,000 | $1.26 |
| Jan 26, 2026 | Doebele Robertofficer: Chief Medical Officer | Grant | 230,000 | $1.26 |
| Jun 23, 2025 | Burow Kristinadirector, 10 percent owner: | Grant | 16,000 | $1.03 |
| Jun 23, 2025 | Lim Jonathan Edirector | Grant | 24,000 | $1.03 |
| Jun 23, 2025 | Whiting Nancydirector | Grant | 16,000 | $1.03 |
| Jun 23, 2025 | Brennan Christinedirector | Grant | 16,000 | $1.03 |
| Jun 23, 2025 | Christensen Jamesdirector | Grant | 16,000 | $1.03 |
| Jun 23, 2025 | Lew Jenniferdirector | Grant | 16,000 | $1.03 |
| Jan 10, 2020 | Patterson Matthew Rdirector, officer: Chief Executive Officer | Option | 74,297 | $2.19 |
| Jan 10, 2020 | Patterson Matthew Rdirector, officer: Chief Executive Officer | Option | 64,751 | $0.78 |
| Jan 10, 2020 | Soloway Thomas Pofficer: Executive Vice President, CFO | Option | 144,669 | $2.76 |
| Jan 10, 2020 | Soloway Thomas Pofficer: Executive Vice President, CFO | Option | 6,219 | $15.26 |
| Jan 10, 2020 | Patterson Matthew Rdirector, officer: Chief Executive Officer | Option | 11,666 | $15.26 |
| Jan 10, 2020 | Patterson Matthew Rdirector, officer: Chief Executive Officer | Option | 11,824 | $9.50 |
| Dec 16, 2019 | Conner Edward R.officer: SVP, Chief Medical Officer | Tax | 5,416 | $59.37 |
| Dec 16, 2019 | Holles Natalie C.officer: President and COO | Option | 6,891 | $27.39 |
| Dec 16, 2019 | Holles Natalie C.officer: President and COO | Option | 74,117 | $15.26 |
Source: BOLD SEC Form 4 filings, latest Jun 29, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their BOLD positions over the last 6 months (SEC Form 13F).
Increased
20
New positions
11
Reduced
21
Sold out
12
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| FMR LLC | Increased | 2.7M | May 15, 2026 |
| FMR LLC | Reduced | 2.7M | Feb 17, 2026 |
| CITADEL ADVISORS LLC | Increased | 1.4M | Feb 17, 2026 |
| CITADEL ADVISORS LLC | Reduced | 1.3M | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 1.2M | May 15, 2026 |
| STONEPINE CAPITAL MANAGEMENT, LLC | Increased | 710K | Feb 13, 2026 |
| SECTORAL ASSET MANAGEMENT INC | Unchanged | 679K | May 15, 2026 |
| SECTORAL ASSET MANAGEMENT INC | Unchanged | 679K | Feb 9, 2026 |
| VANGUARD GROUP INC | Increased | 663K | Jan 29, 2026 |
| STONEPINE CAPITAL MANAGEMENT, LLC | Reduced | 598K | May 14, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | Unchanged | 556K | May 15, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | Unchanged | 556K | Feb 17, 2026 |
| RBF CAPITAL, LLC | Unchanged | 400K | May 18, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 399K | May 14, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 341K | Feb 12, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.