BOLD insider transaction filings
Boundless Bio, Inc. — 24 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-07-21. Screen BOLD transaction legs live →
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-07-21 | 4 | TANG KEVIN — 10% owner TANG CAPITAL MANAGEMENT LLC — 10% owner | Purchase (P): 265 @ $2.44 · Purchase (P): 1,623 @ $2.44 · Purchase (P): 2,975 @ $2.44 | EDGAR |
| 2026-07-16 | 4 | TANG KEVIN — 10% owner TANG CAPITAL MANAGEMENT LLC — 10% owner | Purchase (P): 43,878 @ $2.43 · Purchase (P): 1,600 @ $2.44 · Purchase (P): 18,491 @ $2.44 | EDGAR |
| 2026-07-13 | 4 | TANG KEVIN — 10% owner TANG CAPITAL MANAGEMENT LLC — 10% owner | Purchase (P): 7 @ $2.48 · Purchase (P): 43,367 @ $2.43 · Purchase (P): 48,211 @ $2.42 | EDGAR |
| 2026-07-08 | 4 | TANG KEVIN — 10% owner TANG CAPITAL MANAGEMENT LLC — 10% owner | Purchase (P): 27,062 @ $2.49 · Purchase (P): 15,810 @ $2.48 · Purchase (P): 14,338 @ $2.46 | EDGAR |
| 2026-07-06 | 4 | ARCH Venture Fund IX, L.P. — 10% owner ARCH Venture Fund IX Overage, L.P. — 10% owner ARCH Venture Fund X Overage, L.P. — 10% owner ARCH Venture Partners IX, L.P. — 10% owner ARCH Venture Partners IX Overage, L.P. — 10% owner ARCH Venture Partners X Overage, L.P. — 10% owner ARCH Venture Partners IX, LLC — 10% owner ARCH Venture Partners X, LLC — 10% owner | Option exercise (M): 16,000 @ $1.03 · Sale (S): 16,000 @ $2.49 · Option exercise (M): 16,000 (derivative) @ $0 | EDGAR |
| 2026-07-06 | 4 | CRANDELL KEITH — 10% owner BYBEE CLINTON — 10% owner NELSEN ROBERT — 10% owner GILLIS STEVEN — 10% owner Burow Kristina — 10% owner | Option exercise (M): 16,000 @ $1.03 · Sale (S): 16,000 @ $2.49 · Option exercise (M): 16,000 (derivative) @ $0 | EDGAR |
| 2026-07-02 | 4 | TANG KEVIN — 10% owner TANG CAPITAL MANAGEMENT LLC — 10% owner | Purchase (P): 25,930 @ $2.54 · Purchase (P): 100 @ $2.50 · Purchase (P): 71,612 @ $2.49 · Purchase (P): 9,821 @ $2.49 | EDGAR |
| 2026-06-29 | 4 | TANG KEVIN — 10% owner TANG CAPITAL MANAGEMENT LLC — 10% owner | Purchase (P): 145,880 @ $2.48 · Purchase (P): 510 @ $2.56 · Purchase (P): 75,047 @ $2.55 · Purchase (P): 134 @ $2.54 · Purchase (P): 63,985 @ $2.47 · Purchase (P): 777 @ $2.48 | EDGAR |
| 2026-06-15 | 4 | Whiting Nancy — Director | Grant/award (A): 32,000 (derivative) @ $0 | EDGAR |
| 2026-06-15 | 4 | Christensen James — Director | Grant/award (A): 32,000 (derivative) @ $0 | EDGAR |
| 2026-06-15 | 4 | Lew Jennifer — Director | Grant/award (A): 32,000 (derivative) @ $0 | EDGAR |
| 2026-06-15 | 4 | Lim Jonathan E — Director | Grant/award (A): 48,000 (derivative) @ $0 | EDGAR |
| 2026-01-26 | 4 | Doebele Robert — Chief Medical Officer | Grant/award (A): 230,000 (derivative) @ $0 | EDGAR |
| 2026-01-26 | 4 | Oien Jessica — See Remarks | Grant/award (A): 220,000 (derivative) @ $0 | EDGAR |
| 2026-01-26 | 4 | Hassig Christian — Chief Scientific Officer | Grant/award (A): 230,000 (derivative) @ $0 | EDGAR |
| 2026-01-26 | 4 | Hornby Zachary — President & CEO, Director | Grant/award (A): 600,000 (derivative) @ $0 | EDGAR |
| 2026-01-26 | 4 | HINKLE DAVID A — See Remarks | Grant/award (A): 140,000 (derivative) @ $0 | EDGAR |
| 2025-06-23 | 4 | Brennan Christine — Director | Grant/award (A): 16,000 (derivative) @ $0 | EDGAR |
| 2025-06-23 | 4 | Christensen James — Director | Grant/award (A): 16,000 (derivative) @ $0 | EDGAR |
| 2025-06-23 | 4 | Whiting Nancy — Director | Grant/award (A): 16,000 (derivative) @ $0 | EDGAR |
| 2025-06-23 | 4 | Burow Kristina — Director, 10% owner | Grant/award (A): 16,000 (derivative) @ $0 | EDGAR |
| 2025-06-23 | 4 | Lew Jennifer — Director | Grant/award (A): 16,000 (derivative) @ $0 | EDGAR |
| 2025-06-23 | 4 | Lim Jonathan E — Director | Grant/award (A): 24,000 (derivative) @ $0 | EDGAR |
| 2025-02-03 | 4 | Doebele Robert — Chief Medical Officer | Grant/award (A): 180,000 (derivative) @ $0 | EDGAR |
Recent 8-K events — Boundless Bio, Inc.
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-06-23 | 8-K | 1.01 — Entry into a Material Definitive Agreement ? 3.02 — Unregistered Sales of Equity Securities 5.01 — Changes in Control of Registrant 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 7.01 — Regulation FD Disclosure 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-06-17 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2026-05-08 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-04-13 | 8-K | 1.02 — Termination of a Material Definitive Agreement 2.03 — Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant | EDGAR |
| 2026-03-09 | 8-K | 2.02 — Results of Operations and Financial Condition 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-11-05 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-08-05 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-06-23 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2025-05-23 | 8-K | ? 8.01 — Other Events | EDGAR |
| 2025-05-09 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
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