SEC Insider Transactions from Hornby Zachary.

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

Hornby Zachary has filed 11 insider transactions across 1 company since March 2024.

Most recent transaction: a grant/award of 600000 shares of Boundless Bio, Inc. ($BOLD) on January 23, 2026.

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Transaction Date Company Ticker Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
Jan. 23, 2026 Boundless Bio, Inc. $BOLD Hornby Zachary President & CEO A Stock Option (right to buy) 600000 $0.00 600,000.0000 22,386,000 9999.99% 2.68%
Jan. 22, 2025 Boundless Bio, Inc. $BOLD Hornby Zachary President & CEO A Stock Option 295000 $0.00 295,000.0000 22,300,000 9999.99% 1.32%
Aug. 19, 2024 Boundless Bio, Inc. $BOLD Hornby Zachary President & CEO D Stock Option 256410 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Boundless Bio, Inc. $BOLD Hornby Zachary President & CEO D Stock Option 257207 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Boundless Bio, Inc. $BOLD Hornby Zachary President & CEO D Stock Option 162343 $0.00 0.0000 1,248 100.00% 100.00%
Aug. 19, 2024 Boundless Bio, Inc. $BOLD Hornby Zachary President & CEO A Stock Option 256410 $0.00 256,410.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Boundless Bio, Inc. $BOLD Hornby Zachary President & CEO A Stock Option 471282 $0.00 471,282.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Boundless Bio, Inc. $BOLD Hornby Zachary President & CEO A Stock Option 257207 $0.00 257,207.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Boundless Bio, Inc. $BOLD Hornby Zachary President & CEO A Stock Option 162343 $0.00 162,343.0000 1,248 9999.99% 100.00%
Aug. 19, 2024 Boundless Bio, Inc. $BOLD Hornby Zachary President & CEO D Stock Option 471282 $0.00 0.0000 1,248 100.00% 100.00%
March 27, 2024 Boundless Bio, Inc. $BOLD Hornby Zachary President & CEO A Stock Option 162343 $0.00 162,343.0000 1,248 9999.99% 100.00%