Boundless Bio, Inc. ($BOLD) Insider Transactions

Last updated: 2026-03-14 11:45 UTC | Total transactions: 139

In the last 12 months, insiders at Boundless Bio, Inc. ($BOLD) filed 139 transactions with the SEC: 8 open-market purchases totaling $14,600,000 and 0 sales totaling $0. Net insider sentiment: net buying.

Boundless Bio, Inc. operates in the Pharmaceutical preparations industry (Life sciences sector).

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View all SEC Filings for Boundless Bio, Inc. (BOLD).

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Recent Insider Transactions

Transaction Date Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
Jan. 23, 2026 Hassig Christian Chief Scientific Officer A Stock Option (right to buy) 230000 $0.00 230,000.0000 22,386,000 9999.99% 1.03%
Jan. 23, 2026 Oien Jessica See Remarks A Stock Option (right to buy) 220000 $0.00 220,000.0000 22,386,000 9999.99% 0.98%
Jan. 23, 2026 Doebele Robert Chief Medical Officer A Stock Option (right to buy) 230000 $0.00 230,000.0000 22,386,000 9999.99% 1.03%
Jan. 23, 2026 Hornby Zachary President & CEO A Stock Option (right to buy) 600000 $0.00 600,000.0000 22,386,000 9999.99% 2.68%
Jan. 23, 2026 HINKLE DAVID A See Remarks A Stock Option (right to buy) 140000 $0.00 140,000.0000 22,386,000 9999.99% 0.63%
June 23, 2025 Whiting Nancy Not found A Stock Option (right to buy) 16000 $0.00 16,000.0000 22,300,000 9999.99% 0.07%
June 23, 2025 Christensen James Not found A Stock Option (right to buy) 16000 $0.00 16,000.0000 22,300,000 9999.99% 0.07%
June 23, 2025 Lew Jennifer Not found A Stock Option (right to buy) 16000 $0.00 16,000.0000 22,300,000 9999.99% 0.07%
June 23, 2025 Lim Jonathan E Not found A Stock Option (right to buy) 24000 $0.00 24,000.0000 22,300,000 9999.99% 0.11%
June 23, 2025 Burow Kristina Not found A Stock Option (right to buy) 16000 $0.00 16,000.0000 22,300,000 9999.99% 0.07%
June 23, 2025 Brennan Christine Not found A Stock Option (right to buy) 16000 $0.00 16,000.0000 22,300,000 9999.99% 0.07%
Feb. 3, 2025 Doebele Robert Chief Medical Officer A Stock Option 180000 $0.00 180,000.0000 22,300,000 9999.99% 0.81%
Jan. 22, 2025 Hornby Zachary President & CEO A Stock Option 295000 $0.00 295,000.0000 22,300,000 9999.99% 1.32%
Jan. 22, 2025 Hassig Christian Chief Scientific Officer A Stock Option 95000 $0.00 95,000.0000 22,300,000 9999.99% 0.43%
Jan. 22, 2025 Oien Jessica See Remarks A Stock Option 90000 $0.00 90,000.0000 22,300,000 9999.99% 0.40%
Jan. 22, 2025 HINKLE DAVID A See Remarks A Stock Option 65000 $0.00 65,000.0000 22,300,000 9999.99% 0.29%
Aug. 19, 2024 Oien Jessica See Remarks D Stock Option 26090 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Oien Jessica See Remarks D Stock Option 16234 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Oien Jessica See Remarks A Stock Option 32051 $0.00 32,051.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Oien Jessica See Remarks A Stock Option 29148 $0.00 29,148.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Oien Jessica See Remarks A Stock Option 10200 $0.00 10,200.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Oien Jessica See Remarks A Stock Option 42051 $0.00 42,051.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Oien Jessica See Remarks A Stock Option 35897 $0.00 35,897.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Oien Jessica See Remarks A Stock Option 26090 $0.00 26,090.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Oien Jessica See Remarks A Stock Option 16234 $0.00 16,234.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Hornby Zachary President & CEO D Stock Option 256410 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Hornby Zachary President & CEO D Stock Option 471282 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Hornby Zachary President & CEO D Stock Option 257207 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Hornby Zachary President & CEO D Stock Option 162343 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Hornby Zachary President & CEO A Stock Option 256410 $0.00 256,410.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Hornby Zachary President & CEO A Stock Option 471282 $0.00 471,282.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Hornby Zachary President & CEO A Stock Option 257207 $0.00 257,207.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Hornby Zachary President & CEO A Stock Option 162343 $0.00 162,343.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Abdollahian Neil Chief Business Officer D Stock Option 82051 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Abdollahian Neil Chief Business Officer D Stock Option 19948 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Abdollahian Neil Chief Business Officer D Stock Option 54871 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Abdollahian Neil Chief Business Officer D Stock Option 36852 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Abdollahian Neil Chief Business Officer D Stock Option 23191 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Abdollahian Neil Chief Business Officer A Stock Option 82051 $0.00 82,051.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Abdollahian Neil Chief Business Officer A Stock Option 19948 $0.00 19,948.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Abdollahian Neil Chief Business Officer A Stock Option 54871 $0.00 54,871.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Abdollahian Neil Chief Business Officer A Stock Option 36852 $0.00 36,852.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Abdollahian Neil Chief Business Officer A Stock Option 23191 $0.00 23,191.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Wagner Klaus W. Chief Medical Officer D Stock Option 102564 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Wagner Klaus W. Chief Medical Officer D Stock Option 9635 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Wagner Klaus W. Chief Medical Officer D Stock Option 94871 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Wagner Klaus W. Chief Medical Officer D Stock Option 68080 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Wagner Klaus W. Chief Medical Officer D Stock Option 41745 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Wagner Klaus W. Chief Medical Officer A Stock Option 102564 $0.00 102,564.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Wagner Klaus W. Chief Medical Officer A Stock Option 9635 $0.00 9,635.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Wagner Klaus W. Chief Medical Officer A Stock Option 94871 $0.00 94,871.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Wagner Klaus W. Chief Medical Officer A Stock Option 68080 $0.00 68,080.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Wagner Klaus W. Chief Medical Officer A Stock Option 41745 $0.00 41,745.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Rubin Jami Chief Financial Officer D Stock Option 196666 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Rubin Jami Chief Financial Officer D Stock Option 32468 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Rubin Jami Chief Financial Officer A Stock Option 196666 $0.00 196,666.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Rubin Jami Chief Financial Officer A Stock Option 51420 $0.00 51,420.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Rubin Jami Chief Financial Officer A Stock Option 32468 $0.00 32,468.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Rubin Jami Chief Financial Officer D Stock Option 51420 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Hassig Christian Chief Scientific Officer D Stock Option 10256 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Hassig Christian Chief Scientific Officer D Stock Option 62820 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Hassig Christian Chief Scientific Officer D Stock Option 94871 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Hassig Christian Chief Scientific Officer D Stock Option 76173 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Hassig Christian Chief Scientific Officer D Stock Option 48703 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Hassig Christian Chief Scientific Officer A Stock Option 10256 $0.00 10,256.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Hassig Christian Chief Scientific Officer A Stock Option 62820 $0.00 62,820.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Hassig Christian Chief Scientific Officer A Stock Option 94871 $0.00 94,871.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Hassig Christian Chief Scientific Officer A Stock Option 76173 $0.00 76,173.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Hassig Christian Chief Scientific Officer A Stock Option 48703 $0.00 48,703.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Oien Jessica See Remarks D Stock Option 32051 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Oien Jessica See Remarks D Stock Option 29148 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Oien Jessica See Remarks D Stock Option 10200 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Oien Jessica See Remarks D Stock Option 42051 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Oien Jessica See Remarks D Stock Option 35897 $0.00 0.0000 1,248 100.00% 100.00%
June 20, 2024 Lim Jonathan E Not found A Stock Option (Right to Buy) 6610 $0.00 6,610.0000 1,248 9999.99% 100.00%
April 2, 2024 CRANDELL KEITH Not found C Series A Convertible Preferred Stock 424908 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 Burow Kristina Not found C Series A Convertible Preferred Stock 586080 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 Burow Kristina Not found C Series A Convertible Preferred Stock 454212 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 Burow Kristina Not found C Series B Convertible Preferred Stock 227920 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 Burow Kristina Not found C Series C Convertible Preferred Stock 164835 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 Burow Kristina Not found C Series C Convertible Preferred Stock 201465 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 Burow Kristina Not found C Series C Convertible Preferred Stock 366301 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 Lim Jonathan E Not found C Common Stock 525274 $0.00 653,479.0000 1,248 409.71% 100.00%
April 2, 2024 Lim Jonathan E Not found C Series A Convertible Preferred Stock 512820 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 Lim Jonathan E Not found C Series B Convertible Preferred Stock 5128 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 Lim Jonathan E Not found C Series C Convertible Preferred Stock 7326 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 CRANDELL KEITH Not found C Common Stock 589743 $0.00 617,092.0000 1,248 2156.36% 100.00%
April 2, 2024 CRANDELL KEITH Not found C Common Stock 787545 $0.00 828,570.0000 1,248 1919.67% 100.00%
April 2, 2024 CRANDELL KEITH Not found C Common Stock 1048433 $0.00 1,048,433.0000 1,248 9999.99% 100.00%
April 2, 2024 CRANDELL KEITH Not found P Common Stock 66667 $16.00 683,759.0000 1,248 10.80% 100.00%
April 2, 2024 CRANDELL KEITH Not found P Common Stock 133333 $16.00 1,181,766.0000 1,248 12.72% 100.00%
April 2, 2024 Burow Kristina Not found C Series A Convertible Preferred Stock 424908 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 CRANDELL KEITH Not found C Series A Convertible Preferred Stock 586080 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 CRANDELL KEITH Not found C Series A Convertible Preferred Stock 454212 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 CRANDELL KEITH Not found C Series B Convertible Preferred Stock 227920 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 CRANDELL KEITH Not found C Series C Convertible Preferred Stock 164835 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 CRANDELL KEITH Not found C Series C Convertible Preferred Stock 201465 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 CRANDELL KEITH Not found C Series C Convertible Preferred Stock 366301 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 ARCH Venture Fund IX, L.P. Not found C Common Stock 589743 $0.00 617,092.0000 1,248 2156.36% 100.00%
April 2, 2024 ARCH Venture Fund IX, L.P. Not found C Common Stock 787545 $0.00 828,570.0000 1,248 1919.67% 100.00%
April 2, 2024 ARCH Venture Fund IX, L.P. Not found C Common Stock 1048433 $0.00 1,048,433.0000 1,248 9999.99% 100.00%
April 2, 2024 ARCH Venture Fund IX, L.P. Not found P Common Stock 66667 $16.00 683,759.0000 1,248 10.80% 100.00%
April 2, 2024 ARCH Venture Fund IX, L.P. Not found P Common Stock 133333 $16.00 1,181,766.0000 1,248 12.72% 100.00%
April 2, 2024 ARCH Venture Fund IX, L.P. Not found C Series A Convertible Preferred Stock 424908 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 ARCH Venture Fund IX, L.P. Not found C Series A Convertible Preferred Stock 586080 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 ARCH Venture Fund IX, L.P. Not found C Series A Convertible Preferred Stock 454212 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 ARCH Venture Fund IX, L.P. Not found C Series B Convertible Preferred Stock 227920 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 ARCH Venture Fund IX, L.P. Not found C Series C Convertible Preferred Stock 164835 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 ARCH Venture Fund IX, L.P. Not found C Series C Convertible Preferred Stock 201465 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 ARCH Venture Fund IX, L.P. Not found C Series C Convertible Preferred Stock 366301 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 RA CAPITAL MANAGEMENT, L.P. Not found C Common Stock 1587912 $0.00 1,587,912.0000 1,248 9999.99% 100.00%
April 2, 2024 RA CAPITAL MANAGEMENT, L.P. Not found P Common Stock 296875 $16.00 1,884,787.0000 1,248 18.70% 100.00%
April 2, 2024 RA CAPITAL MANAGEMENT, L.P. Not found C Common Stock 280219 $0.00 280,219.0000 1,248 9999.99% 100.00%
April 2, 2024 RA CAPITAL MANAGEMENT, L.P. Not found P Common Stock 15625 $16.00 295,844.0000 1,248 5.58% 100.00%
April 2, 2024 RA CAPITAL MANAGEMENT, L.P. Not found C Series B Preferred Stock 17000000 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 RA CAPITAL MANAGEMENT, L.P. Not found C Series B Preferred Stock 3000000 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 RA CAPITAL MANAGEMENT, L.P. Not found C Series C Preferred Stock 13964285 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 RA CAPITAL MANAGEMENT, L.P. Not found C Series C Preferred Stock 2464286 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 Burow Kristina Not found P Common Stock 133333 $16.00 1,181,766.0000 1,248 12.72% 100.00%
April 2, 2024 Burow Kristina Not found P Common Stock 66667 $16.00 683,759.0000 1,248 10.80% 100.00%
April 2, 2024 Burow Kristina Not found C Common Stock 1048433 $0.00 1,048,433.0000 1,248 9999.99% 100.00%
April 2, 2024 Burow Kristina Not found C Common Stock 787545 $0.00 828,570.0000 1,248 1919.67% 100.00%
April 2, 2024 Burow Kristina Not found C Common Stock 589743 $0.00 617,092.0000 1,248 2156.36% 100.00%
April 2, 2024 Wellington Biomedical Innovation Master Investors (Cayman) I L.P. Not found C Common Stock 366300 $0.00 556,233.0000 1,248 192.86% 100.00%
April 2, 2024 Wellington Biomedical Innovation Master Investors (Cayman) I L.P. Not found C Series B Preferred Stock 3703704 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 Wellington Biomedical Innovation Master Investors (Cayman) I L.P. Not found C Series C Preferred Stock 7142857 $0.00 0.0000 1,248 100.00% 100.00%
April 2, 2024 Wellington Biomedical Innovation Master Investors (Cayman) I L.P. Not found C Common Stock 189933 $0.00 189,933.0000 1,248 9999.99% 100.00%
March 27, 2024 Hornby Zachary President & CEO A Stock Option 162343 $0.00 162,343.0000 1,248 9999.99% 100.00%
March 27, 2024 Christensen James Not found A Stock Option 13219 $0.00 13,219.0000 1,248 9999.99% 100.00%
March 27, 2024 Oien Jessica See Remarks A Stock Option 16234 $0.00 16,234.0000 1,248 9999.99% 100.00%
March 27, 2024 Abdollahian Neil Chief Business Officer A Stock Option 23191 $0.00 23,191.0000 1,248 9999.99% 100.00%
March 27, 2024 Wagner Klaus W. Chief Medical Officer A Stock Option 41745 $0.00 41,745.0000 1,248 9999.99% 100.00%
March 27, 2024 Whiting Nancy Not found A Stock Option 13219 $0.00 13,219.0000 1,248 9999.99% 100.00%
March 27, 2024 Hassig Christian Chief Scientific Officer A Stock Option 48703 $0.00 48,703.0000 1,248 9999.99% 100.00%
March 27, 2024 Lew Jennifer Not found A Stock Option 13219 $0.00 13,219.0000 1,248 9999.99% 100.00%
March 27, 2024 Lim Jonathan E Not found A Stock Option 13219 $0.00 13,219.0000 1,248 9999.99% 100.00%
March 27, 2024 Brennan Christine Not found A Stock Option 26438 $0.00 26,438.0000 1,248 9999.99% 100.00%
March 27, 2024 Burow Kristina Not found A Stock Option 26438 $0.00 26,438.0000 1,248 9999.99% 100.00%
March 27, 2024 Rubin Jami Chief Financial Officer A Stock Option 32468 $0.00 32,468.0000 1,248 9999.99% 100.00%