SEC Insider Transactions from Byrnes Michael.

Last updated: 2026-03-14 11:44 UTC | Total transactions: 8

Byrnes Michael has filed 8 insider transactions across 2 companies since February 2024.

Most recent transaction: a grant/award of 690900 shares of CERO THERAPEUTICS HOLDINGS, INC. ($CERO) on January 07, 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. 7, 2026 CERO THERAPEUTICS HOLDINGS, INC. $CERO Byrnes Michael Director A Stock Option (Right to Buy) 690900 $0.00 690,900.0000 1,264,884 9999.99% 54.62%
May 30, 2025 CERO THERAPEUTICS HOLDINGS, INC. $CERO Byrnes Michael Director A Stock Option (Right to Buy) 9326 $0.00 9,326.0000 3,427,616 9999.99% 0.27%
March 4, 2025 CERO THERAPEUTICS HOLDINGS, INC. $CERO Byrnes Michael Director A Stock Option (Right to Buy) 17923 $0.00 17,923.0000 579,432 9999.99% 3.09%
Feb. 24, 2025 CERO THERAPEUTICS HOLDINGS, INC. $CERO Byrnes Michael Director A Stock Option (Right to Buy) 127500 $0.00 255,000.0000 579,432 100.00% 22.00%
Dec. 2, 2024 CERO THERAPEUTICS HOLDINGS, INC. $CERO Byrnes Michael Director A Stock Option (Right to Buy) 127500 $0.00 127,500.0000 24,838 9999.99% 100.00%
May 15, 2024 eFFECTOR Therapeutics, Inc. $EFTR Byrnes Michael Chief Financial Officer A Common Stock 1387 $1.68 3,117.0000 4,704,409 80.17% 0.03%
March 25, 2024 CERO THERAPEUTICS HOLDINGS, INC. $CERO Byrnes Michael Director A Stock Option (Right to Buy) 112500 $0.00 112,500.0000 292 9999.99% 100.00%
Feb. 19, 2024 eFFECTOR Therapeutics, Inc. $EFTR Byrnes Michael Chief Financial Officer A Stock Option (Right to Buy) 40000 $0.00 40,000.0000 0 9999.99% 0.00%