Boundless Bio, Inc. (BOLD)

Latest Insider Confidence Score

2026Q1

50.0
Bullish

Company insider confidence (by quarter)

2024Q1 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Burow Kristina Director 366,301 Apr 4, 2024
Nelsen Robert 10% Owner 366,301 Apr 4, 2024
Crandell Keith 10% Owner 366,301 Apr 4, 2024
Bybee Clinton 10% Owner 366,301 Apr 4, 2024
Gillis Steven 10% Owner 366,301 Apr 4, 2024

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Jan 23, 2026 Jan 26, 2026 Oien Jessica Officer Neutral 52.5 - 0.00% ✗ -
Jan 23, 2026 Jan 26, 2026 Hassig Christian Chief Scientific Officer Neutral 52.5 - 0.00% ✗ -
Jan 23, 2026 Jan 26, 2026 Doebele Robert Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Jan 23, 2026 Jan 26, 2026 Hornby Zachary CEO Neutral 52.5 - 0.00% ✗ -
Jan 23, 2026 Jan 26, 2026 HINKLE DAVID A Officer Neutral 52.5 - 0.00% ✗ -
Jun 23, 2025 Jun 23, 2025 Brennan Christine Director Neutral 52.5 - 0.00% ✗ -
Jun 23, 2025 Jun 23, 2025 Christensen James Director Neutral 52.5 - 0.00% ✗ -
Jun 23, 2025 Jun 23, 2025 Lew Jennifer Director Neutral 52.5 - 0.00% ✗ -
Jun 23, 2025 Jun 23, 2025 Lim Jonathan E Director Neutral 52.5 - 0.00% ✗ -
Jun 23, 2025 Jun 23, 2025 Burow Kristina Director Neutral 52.5 - 0.00% ✗ -
Jun 23, 2025 Jun 23, 2025 Whiting Nancy Director Neutral 52.5 - 0.00% ✗ -
Feb 3, 2025 Feb 3, 2025 Doebele Robert Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Feb 3, 2025 Doebele Robert Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Jan 22, 2025 Jan 23, 2025 HINKLE DAVID A Officer Neutral 52.5 - 0.00% ✗ -
Jan 22, 2025 Jan 23, 2025 Hassig Christian Chief Scientific Officer Neutral 52.5 - 0.00% ✗ -
Jan 22, 2025 Jan 23, 2025 Hornby Zachary CEO Neutral 52.5 - 0.00% ✗ -
Jan 22, 2025 Jan 23, 2025 Oien Jessica Officer Neutral 52.5 - 0.00% ✗ -
Oct 15, 2024 HINKLE DAVID A Officer Neutral 52.5 - 0.00% ✗ -
Aug 19, 2024 Aug 20, 2024 Hassig Christian Chief Scientific Officer Neutral 52.5 - 0.00% ✗ -
Aug 19, 2024 Aug 20, 2024 Oien Jessica Officer Neutral 52.5 - 0.00% ✗ -
Aug 19, 2024 Aug 20, 2024 Hornby Zachary CEO Neutral 52.5 - 0.00% ✗ -
Aug 19, 2024 Aug 20, 2024 Abdollahian Neil Chief Business Officer Neutral 52.5 - 0.00% ✗ -
Aug 19, 2024 Aug 20, 2024 Wagner Klaus W. Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Aug 19, 2024 Aug 20, 2024 Rubin Jami CFO Neutral 52.5 - 0.00% ✗ -
Jun 20, 2024 Jun 20, 2024 Lim Jonathan E Director Neutral 52.5 - 0.00% ✗ -
Apr 2, 2024 Apr 4, 2024 Burow Kristina Director Buy 100.0 +200,000 12.01% ✗ $3.2M
Apr 2, 2024 Apr 4, 2024 Lim Jonathan E Director Neutral 52.5 - 0.00% ✗ -
Apr 2, 2024 Apr 4, 2024 CRANDELL KEITH 10% Owner Buy 100.0 +200,000 12.01% ✗ $3.2M
Apr 2, 2024 Apr 4, 2024 ARCH Venture Fund IX, L.P. 10% Owner Buy 100.0 +200,000 12.01% ✗ $3.2M
Apr 2, 2024 Apr 4, 2024 RA CAPITAL MANAGEMENT, L.P. 10% Owner Buy 100.0 +312,500 16.73% ✗ $5M
Apr 2, 2024 Apr 2, 2024 Wellington Biomedical Innovation Master Investors (Cayman) I L.P. 10% Owner Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Mar 29, 2024 Lim Jonathan E Director Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Mar 29, 2024 Lew Jennifer Director Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Mar 29, 2024 Brennan Christine Director Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Mar 29, 2024 Burow Kristina Director Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Mar 29, 2024 Rubin Jami CFO Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Mar 29, 2024 Hornby Zachary CEO Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Mar 29, 2024 Christensen James Director Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Mar 29, 2024 Oien Jessica Officer Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Mar 29, 2024 Abdollahian Neil Chief Business Officer Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Mar 29, 2024 Wagner Klaus W. Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Mar 29, 2024 Whiting Nancy Director Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Mar 29, 2024 Hassig Christian Chief Scientific Officer Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Wellington Biomedical Innovation Master Investors (Cayman) I L.P. 10% Owner Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 RA CAPITAL MANAGEMENT, L.P. 10% Owner Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Abdollahian Neil Chief Business Officer Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Brennan Christine Director Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Burow Kristina Director Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Christensen James Director Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Hassig Christian Chief Scientific Officer Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Lew Jennifer Director Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Hornby Zachary CEO Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Lim Jonathan E Director Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Rubin Jami CFO Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Oien Jessica Officer Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 CRANDELL KEITH 10% Owner Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Wagner Klaus W. Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 ARCH Venture Fund IX, L.P. 10% Owner Neutral 52.5 - 0.00% ✗ -
Mar 27, 2024 Whiting Nancy Director Neutral 52.5 - 0.00% ✗ -