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Person · CIK 1923988

Robert Arthur Harrington

Director at Cytokinetics

Source: Forms 3, 4, 5 and 144 on SEC EDGAR

Sold on Form 4$395K
Noticed on Form 144$300K
Bought on Form 4$0
Companies1

Holdings now

As reported after the latest Form 3, 4 or 5 at each company.

How these figures work

Options and RSUs are from the latest filing that lists them; earlier grants may also be held. Holdings can be out of date when a person stops filing.

CompanySecurityHeldShares or unitsAs of
Cytokinetics CYTKCommon StockDirectly22,127Oct 16, 2026 · Filing · EDGAR
Cytokinetics CYTKNon-Qualified Stock Option (Right to Buy)
exercise $77.15, expires May 26, 2036, into Common Stock
Directly4,301May 27, 2026 · Filing · EDGAR

Sold and noticed by quarter

Robert Arthur Harrington: dollars sold on Form 4 and noticed on Form 144 per quarter, Q2 2024 to Q4 2026$152K$0Q2 2024: $77K noticed on Form 144Q2 2024: $77K sold on Form 4Q3 2024: $14K noticed on Form 144Q3 2024: $14K sold on Form 4Q4 2024: $0 noticed on Form 144Q4 2024: $0 sold on Form 4Q1 2025: $58K noticed on Form 144Q1 2025: $38K sold on Form 4Q2 2025: $0 noticed on Form 144Q2 2025: $18K sold on Form 4Q3 2025: $152K noticed on Form 144Q3 2025: $105K sold on Form 4Q4 2025: $0 noticed on Form 144Q4 2025: $144K sold on Form 4Q1 2026: $0 noticed on Form 144Q1 2026: $0 sold on Form 4Q2 2026: $0 noticed on Form 144Q2 2026: $0 sold on Form 4Q3 2026: $0 noticed on Form 144Q3 2026: $0 sold on Form 4Q4 2026: $0 noticed on Form 144Q4 2026: $0 sold on Form 4Q2 2024Q1 2025Q4 2025Q3 2026

Sold (Form 4) Noticed (Form 144) Bought (Form 4)

Quarterly totals as a table
QuarterSold (Form 4)Noticed (Form 144)
Q4 2025$144K—
Q3 2025$105K$152K
Q2 2025$18K—
Q1 2025$38K$58K
Q3 2024$14K$14K
Q2 2024$77K$77K

Planned sales (Form 144) and the sales that followed

Each Form 144 notice of a planned sale, grouped by broker and 10b5-1 plan, with the Form 4 sales we matched to it.

How we match

A Form 144 is a notice of a planned sale by an affiliate. SEC Tracker matches each notice to Form 4 sales by the same person at the same company within 90 days of the notice, up to the shares noticed. The match is our inference, not something either filing states.

Notice dateNoticedPlanned saleOutcomeLinks
Cytokinetics CYTK · Morgan Stanley Smith Barney · 10b5-1 plan adopted May 9, 2025 · 1 notice
Sep 2, 20254,300 · ~$152KSep 2, 2025Sold as noticed Sold 4,300 in 2 sales, Sep 2 to Dec 1 · $248K Form 4 (1) · Form 4 (2)Filing · EDGAR
Cytokinetics CYTK · Morgan Stanley Smith Barney · 10b5-1 plan adopted Nov 8, 2024 · 1 notice
Mar 4, 20251,350 · ~$58KMar 4, 2025Sold as noticed Sold 1,350 in 2 sales, Mar 4 to Apr 3 · $56K Form 4 (1) · Form 4 (2)Filing · EDGAR
Cytokinetics CYTK · Morgan Stanley Smith Barney · 10b5-1 plan adopted Mar 4, 2024 · 2 notices
Jul 5, 2024253 · ~$14KJul 5, 2024Sold as noticed Sold 253 at $54.61 on Jul 5 · $14K Form 4Filing · EDGAR
Jun 3, 20241,580 · ~$77KJun 3, 2024Sold as noticed Sold 1,580 at $48.64 on Jun 3 · $77K Form 4Filing · EDGAR

Every transaction, by company

Each Form 3, 4 and 5 transaction in plain words, newest first.

How these figures work

Values are shares times the price each filing states; grants, exercises and gifts usually state no price. Held after is what the filing reports was held once the transaction was done, directly or through the named holder.

Cytokinetics CYTK Director · filings 2022 to 2026 · sold $395K · $300K noticed on Form 144

DateTransactionSharesPriceValueHeld afterSource
Oct 16, 2026Grant or award from the company+195$63.92$12K22,127 directFiling · EDGAR
Jul 15, 2026Grant or award from the company+151$82.62$12K21,932 directFiling · EDGAR
May 27, 2026Grant or award from the company+2,85121,781 directFiling · EDGAR
May 27, 2026Grant or award from the company
Non-Qualified Stock Option (Right to Buy)
+4,3014,301 directFiling · EDGAR
Apr 15, 2026Grant or award from the company+191$65.37$12K18,930 directFiling · EDGAR
Jan 15, 2026Grant or award from the company+197$63.44$12K18,739 directFiling · EDGAR
Dec 1, 2025Sale under a 10b5-1 plan−2,150$66.80$144K18,542 directFiling · EDGAR
Oct 15, 2025Grant or award from the company+199$62.80$12K20,692 directFiling · EDGAR
Sep 2, 2025Sale under a 10b5-1 plan−2,150$48.67$105K20,493 directFiling · EDGAR
Jul 15, 2025Grant or award from the company+328$38.01$12K22,643 directFiling · EDGAR
May 14, 2025Grant or award from the company+7,33322,315 directFiling · EDGAR
May 14, 2025Grant or award from the company
Non-Qualified Stock Option (Right to Buy)
+10,88010,880 directFiling · EDGAR
Apr 15, 2025Grant or award from the company+324$38.56$12K14,982 directFiling · EDGAR
Apr 3, 2025Sale under a 10b5-1 plan−450$39.43$18K14,658 directFiling · EDGAR
Mar 4, 2025Sale under a 10b5-1 plan−900$42.50$38K15,108 directFiling · EDGAR
Jan 2, 2025Grant or award from the company+255$48.93$12K16,008 directFiling · EDGAR
Oct 1, 2024Grant or award from the company+237$52.60$12K15,753 directFiling · EDGAR
Jul 5, 2024Sale under a 10b5-1 plan−253$54.61$14K15,516 directFiling · EDGAR
Jul 1, 2024Grant or award from the company+22815,769 directFiling · EDGAR
Jun 3, 2024Sale under a 10b5-1 plan−1,580$48.64$77K15,541 directFiling · EDGAR
May 15, 2024Grant or award from the company+5,60017,121 directFiling · EDGAR
May 15, 2024Grant or award from the company
Non-Qualified Stock Option (Right to Buy)
+3,6363,636 directFiling · EDGAR
Jan 2, 2024Grant or award from the company+148$84.12$12K11,521 directFiling · EDGAR
Oct 2, 2023Grant or award from the company+448$27.88$12K11,373 directFiling · EDGAR
Jul 3, 2023Grant or award from the company+374$33.36$12K10,925 directFiling · EDGAR
May 10, 2023Grant or award from the company+5,00010,551 directFiling · EDGAR
May 10, 2023Grant or award from the company
Non-Qualified Stock Option (Right to Buy)
+10,00010,000 directFiling · EDGAR
Apr 3, 2023Grant or award from the company+298$37.71$11K5,551 directFiling · EDGAR
Jan 3, 2023Grant or award from the company+253$44.35$11K5,253 directFiling · EDGAR
May 10, 2022Grant or award from the company+5,0005,000 directFiling · EDGAR
May 10, 2022Grant or award from the company
Non-Qualified Stock Option (right to buy)
+10,00010,000 directFiling · EDGAR
Apr 8, 2022Grant or award from the company
Non-Qualified Stock Option (right to buy)
+35,000$41.69$1.5M35,000 directFiling · EDGAR
All 32 Forms 3, 4, 5 and 144
FiledFormCompanyLinks
Oct 20, 2026Form 4Cytokinetics CYTKFiling · EDGAR
Jul 16, 2026Form 4Cytokinetics CYTKFiling · EDGAR
May 27, 2026Form 4Cytokinetics CYTKFiling · EDGAR
Apr 15, 2026Form 4Cytokinetics CYTKFiling · EDGAR
Jan 16, 2026Form 4Cytokinetics CYTKFiling · EDGAR
Dec 2, 2025Form 4Cytokinetics CYTKFiling · EDGAR
Oct 16, 2025Form 4Cytokinetics CYTKFiling · EDGAR
Sep 2, 2025Form 144Cytokinetics CYTKFiling · EDGAR
Sep 2, 2025Form 4Cytokinetics CYTKFiling · EDGAR
Jul 16, 2025Form 4Cytokinetics CYTKFiling · EDGAR
May 19, 2025Form 4Cytokinetics CYTKFiling · EDGAR
Apr 16, 2025Form 4Cytokinetics CYTKFiling · EDGAR
Apr 4, 2025Form 4Cytokinetics CYTKFiling · EDGAR
Mar 4, 2025Form 144Cytokinetics CYTKFiling · EDGAR
Mar 4, 2025Form 4Cytokinetics CYTKFiling · EDGAR
Jan 6, 2025Form 4Cytokinetics CYTKFiling · EDGAR
Oct 3, 2024Form 4Cytokinetics CYTKFiling · EDGAR
Jul 8, 2024Form 4Cytokinetics CYTKFiling · EDGAR
Jul 5, 2024Form 144Cytokinetics CYTKFiling · EDGAR
Jul 3, 2024Form 4Cytokinetics CYTKFiling · EDGAR
Jun 5, 2024Form 4Cytokinetics CYTKFiling · EDGAR
Jun 3, 2024Form 144Cytokinetics CYTKFiling · EDGAR
May 16, 2024Form 4Cytokinetics CYTKFiling · EDGAR
Jan 3, 2024Form 4Cytokinetics CYTKFiling · EDGAR
Oct 3, 2023Form 4Cytokinetics CYTKFiling · EDGAR
Jul 5, 2023Form 4Cytokinetics CYTKFiling · EDGAR
May 18, 2023Form 4Cytokinetics CYTKFiling · EDGAR
Apr 5, 2023Form 4Cytokinetics CYTKFiling · EDGAR
Jan 4, 2023Form 4Cytokinetics CYTKFiling · EDGAR
May 11, 2022Form 4Cytokinetics CYTKFiling · EDGAR
Apr 18, 2022Form 4Cytokinetics CYTKFiling · EDGAR
Apr 18, 2022Form 3Cytokinetics CYTKFiling · EDGAR

Every figure is as filed with the SEC on Forms 3, 4, 5 and 144. Holdings are the amounts reported after each person's latest filing at each company and can be out of date. Matching a Form 144 notice to Form 4 sales is SEC Tracker's inference from owner, company, dates and share counts, not something the filings state. Not investment advice. Not affiliated with the U.S. SEC.

Data on this page was fetched . The filing on SEC.gov is the record.