Form 4 Tracker
Boundless Bio, Inc.
BOLD

17 insider filings · Latest: Jul 17, 2026

Common Stock Transactions
Txn DateAcceptedInsiderTypeSharesAvg PriceValueShares OwnedFiling
Jul 21, 2026Jul 21 11:38 PMKevin Tang10% Owner
Purchase
2,975$2.44$7.3K2,858,935(I)

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Jul 20, 2026Jul 21 11:38 PMKevin Tang10% Owner
Purchase
1,623$2.44$4.0K2,855,960(I)

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Jul 17, 2026Jul 21 11:38 PMKevin Tang10% Owner
Purchase
265$2.44$6472,854,337(I)

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Jul 16, 2026Jul 17 12:10 AMKevin Tang10% Owner
Purchase
18,491$2.44$45.1K2,854,072(I)

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Jul 15, 2026Jul 17 12:10 AMKevin Tang10% Owner
Purchase
1,600$2.44$3.9K2,835,581(I)

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Jul 14, 2026Jul 17 12:10 AMKevin Tang10% Owner
Purchase
43,878$2.43$106.6K2,833,981(I)

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Jul 13, 2026Jul 13 11:06 PMKevin Tang10% Owner
Purchase
48,211$2.42$116.7K2,790,103(I)

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Jul 10, 2026Jul 13 11:06 PMKevin Tang10% Owner
Purchase
43,367$2.43$105.4K2,741,892(I)

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Jul 9, 2026Jul 13 11:06 PMKevin Tang10% Owner
Purchase
7$2.48$172,698,525(I)

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Jul 8, 2026Jul 9 12:06 AMKevin Tang10% Owner
Purchase
14,338$2.46$35.3K2,698,518(I)

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Jul 7, 2026Jul 9 12:06 AMKevin Tang10% Owner
Purchase
15,810$2.48$39.2K2,684,180(I)

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Jul 6, 2026Jul 9 12:06 AMKevin Tang10% Owner
Purchase
27,062$2.49$67.4K2,668,370(I)

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Jul 1, 2026Jul 6 9:44 PMKeith Crandell10% Owner
Sale
16,000$2.49$39.8K0(I)

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Jul 1, 2026Jul 6 9:43 PMARCH Venture Fund IX, L.P.10% Owner
Sale
16,000$2.49$39.8K0(I)

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Jul 2, 2026Jul 2 11:45 PMKevin Tang10% Owner
Purchase
9,821$2.49$24.5K2,641,308(I)

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Jul 1, 2026Jul 2 11:45 PMKevin Tang10% Owner
Purchase
71,612$2.49$178.3K2,631,487(I)

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Jun 30, 2026Jul 2 11:45 PMKevin Tang10% Owner
Purchase
26,030$2.54$66.1K2,559,875(I)

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Jun 29, 2026Jun 29 11:56 PMKevin Tang10% Owner
Purchase
64,762$2.47$160.0K2,533,845(I)

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Jun 26, 2026Jun 29 11:56 PMKevin Tang10% Owner
Purchase
75,181$2.55$191.7K2,469,083(I)

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Jun 25, 2026Jun 29 11:56 PMKevin Tang10% Owner
Purchase
146,390$2.48$363.1K2,393,902(I)

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Stock Options & Derivatives
Txn DateAcceptedInsiderTypeSharesExercise PriceShares OwnedFiling
Jul 1, 2026Jul 6 9:44 PMKeith Crandell10% Owner
Option Exercise
16,000$1.030(I)

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Jul 1, 2026Jul 6 9:43 PMARCH Venture Fund IX, L.P.10% Owner
Option Exercise
16,000$1.030(I)

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Jun 15, 2026Jun 15 11:40 PMNancy WhitingDirector
Grant/Award
32,000$1.4032,000(D)

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Jun 15, 2026Jun 15 11:36 PMJonathan E LimDirector
Grant/Award
48,000$1.4048,000(D)

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Jun 15, 2026Jun 15 11:31 PMJames ChristensenDirector
Grant/Award
32,000$1.4032,000(D)

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Jun 15, 2026Jun 15 11:28 PMJennifer LewDirector
Grant/Award
32,000$1.4032,000(D)

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Jan 23, 2026Jan 26 12:00 PMJessica OienChief Legal Officer and Corporate Secretary
Grant/Award
220,000$1.26220,000(D)

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Jan 23, 2026Jan 26 12:00 PMChristian HassigChief Scientific Officer
Grant/Award
230,000$1.26230,000(D)

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Jan 23, 2026Jan 26 12:00 PMRobert DoebeleChief Medical Officer
Grant/Award
230,000$1.26230,000(D)

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Jan 23, 2026Jan 26 12:00 PMZachary HornbyDirector, President & CEO
Grant/Award
600,000$1.26600,000(D)

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Jan 23, 2026Jan 26 12:00 PMDavid A HinkleSenior VP, Finance, Controller and Treasurer
Grant/Award
140,000$1.26140,000(D)

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