SEC Insider Transactions from HENDERSON JOHN T.

Last updated: 2026-03-14 11:45 UTC | Total transactions: 42

John T. Henderson, a director at Cytokinetics Inc. ($CYTK), made two open market sales of common shares in the last year, totaling about $682 thousand. His most recent sale occurred on December 2, 2025. These sales rank 5,801st among 11,678 individual insiders, trailing the average of $8.6 million per seller across about 6.4 transactions. Henderson recorded no open market purchases during this period.

Set Up your own filters →
Transaction Date Company Ticker Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
Jan. 15, 2026 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 334 $63.44 74,995.0000 122,264,929 0.45% 0.00%
Dec. 2, 2025 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director S Common Stock 8750 $63.90 74,661.0000 122,264,929 10.49% 0.01%
Dec. 2, 2025 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Common Stock 8750 $10.00 83,411.0000 122,264,929 11.72% 0.01%
Dec. 2, 2025 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Non-Qualified Stock Option (Right to Buy) 8750 $0.00 0.0000 122,264,929 100.00% 0.01%
Oct. 15, 2025 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 338 $62.80 74,661.0000 118,410,689 0.45% 0.00%
July 15, 2025 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 559 $38.01 74,323.0000 118,410,689 0.76% 0.00%
May 14, 2025 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 7333 $0.00 73,764.0000 118,410,689 11.04% 0.01%
May 14, 2025 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Non-Qualified Stock Option (Right to Buy) 10880 $0.00 10,880.0000 118,410,689 9999.99% 0.01%
April 15, 2025 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Stock Option (Right to Buy) 20000 $0.00 0.0000 118,410,689 100.00% 0.02%
April 15, 2025 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 551 $38.56 66,431.0000 118,410,689 0.84% 0.00%
April 15, 2025 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director S Common Stock 3190 $38.66 66,431.0000 118,410,689 4.58% 0.00%
April 15, 2025 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Common Stock 20000 $6.21 69,621.0000 118,410,689 40.31% 0.02%
Jan. 2, 2025 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 434 $48.93 49,070.0000 0 0.89% 0.00%
Dec. 11, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Non-Qualified Stock Option (Right to Buy) 10092 $0.00 0.0000 0 100.00% 0.00%
Dec. 11, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director S Common Stock 1780 $50.42 38,544.0000 0 4.41% 0.00%
Dec. 11, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Common Stock 1780 $7.37 40,324.0000 0 4.62% 0.00%
Dec. 11, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Common Stock 10092 $7.37 48,636.0000 0 26.18% 0.00%
Dec. 11, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Non-Qualified Stock Option (Right to Buy) 1780 $0.00 10,092.0000 0 14.99% 0.00%
Oct. 1, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 403 $52.60 38,544.0000 0 1.06% 0.00%
July 1, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 388 $0.00 38,141.0000 0 1.03% 0.00%
May 15, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Non-Qualified Stock Option (Right to Buy) 3636 $0.00 3,636.0000 0 9999.99% 0.00%
May 15, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 5600 $0.00 37,753.0000 0 17.42% 0.00%
April 25, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director S Common Stock 10562 $64.54 32,153.0000 0 24.73% 0.00%
Feb. 14, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Non-Qualified Stock Option (Right to Buy) 5000 $0.00 0.0000 0 100.00% 0.00%
Feb. 14, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director S Common Stock 5000 $76.48 42,715.0000 0 10.48% 0.00%
Feb. 14, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Common Stock 5000 $4.44 47,715.0000 0 11.71% 0.00%
Jan. 12, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Common Stock 5000 $4.44 47,715.0000 0 11.71% 0.00%
Jan. 12, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director S Common Stock 5000 $85.14 42,715.0000 0 10.48% 0.00%
Jan. 12, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Non-Qualified Stock Option (Right to Buy) 5000 $0.00 5,000.0000 0 50.00% 0.00%
Jan. 2, 2024 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 252 $84.12 42,715.0000 0 0.59% 0.00%
Dec. 18, 2023 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Non-Qualified Stock Option (Right to Buy) 13020 $0.00 0.0000 0 100.00% 0.00%
Dec. 18, 2023 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Common Stock 13020 $6.72 44,921.0000 0 40.81% 0.00%
Dec. 18, 2023 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director S Common Stock 2458 $36.34 42,463.0000 0 5.47% 0.00%
Oct. 2, 2023 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 762 $27.88 31,901.0000 0 2.45% 0.00%
July 3, 2023 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 636 $33.36 31,139.0000 0 2.09% 0.00%
May 10, 2023 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 5000 $0.00 30,503.0000 0 19.61% 0.00%
May 10, 2023 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Non-Qualified Stock Option (Right to Buy) 10000 $0.00 10,000.0000 0 9999.99% 0.00%
May 15, 2023 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Common Stock 4166 $6.78 29,669.0000 0 16.34% 0.00%
May 15, 2023 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director M Non-Qualified Stock Option (Right to Buy) 4166 $0.00 0.0000 0 100.00% 0.00%
May 15, 2023 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director S Common Stock 4166 $37.77 25,503.0000 0 14.04% 0.00%
April 3, 2023 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 530 $37.71 25,503.0000 0 2.12% 0.00%
Jan. 3, 2023 CYTOKINETICS INC $CYTK HENDERSON JOHN T Director A Common Stock 450 $44.35 24,973.0000 0 1.84% 0.00%