Insider · CIK 0001923988
Robert Arthur Harrington
Files at CYTK (CYTOKINETICS INC). First filing Mar 4, 2025, latest Dec 2, 2025.
In brief
Robert Arthur Harrington files SEC Form 4 as director at CYTK (CYTOKINETICS INC). Since Mar 4, 2025, Robert Arthur Harrington has reported 0 open-market buys worth $0 and 4 open-market sells worth $304k, the latest filed on Dec 2, 2025.
A track record needs three past buys with six months of prices behind them; Robert Arthur Harrington has 0, so none is measured yet.
The newest scored trade: sold $144k of CYTK on Dec 1, 2025, filed Dec 2, 2025, scored 26 (weak), under a 10b5-1 plan. In the last 12 months: 0 buys worth $0 and 1 sell worth $144k.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
CYTK: CYTOKINETICS INC
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 26Weak | CYTOKINETICS INC | $144k 2,150 shares | -10% | +121% from low-3% from high | |
| 20Weak | CYTOKINETICS INC | $105k 2,150 shares | -9% | +66% from low-15% from high | |
| 10Weak | CYTOKINETICS INC | $18k 450 shares | -3% | +8% from low-31% from high | |
| 16Weak | CYTOKINETICS INC | $38k 900 shares | -6% | - |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Sep 2, 2025 | CYTK CYTOKINETICS, INCORPORATED | 4,300 0.00% of outstanding | $152k | Sep 2, 2025 | none |
| Mar 4, 2025 | CYTK CYTOKINETICS, INCORPORATED | 1,350 0.00% of outstanding | $58k | Mar 4, 2025 | none |
Transactions
Every row this insider has filed, 15 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Jul 15, 2026 | CYTK CYTOKINETICS INC | AGrant or award Common Stock | +151 | $82.62 | $12k | 21,932 | Jul 16, 2026 |
| May 27, 2026 | CYTK CYTOKINETICS INC | AGrant or award Common Stock | +2,851 | $0.00 | $0 | 21,781 | May 27, 2026 |
| May 27, 2026 | CYTK CYTOKINETICS INC | AGrant or award Non-Qualified Stock Option (Right to Buy)derivative | +4,301 | $0.00 | $0 | 4,301 | May 27, 2026 |
| Apr 15, 2026 | CYTK CYTOKINETICS INC | AGrant or award Common Stock | +191 | $65.37 | $12k | 18,930 | Apr 15, 2026 |
| Jan 15, 2026 | CYTK CYTOKINETICS INC | AGrant or award Common Stock | +197 | $63.44 | $12k | 18,739 | Jan 16, 2026 |
| Dec 1, 2025 | CYTK CYTOKINETICS INC | SOpen-market sale Common Stock10b5-1 | -2,150 | $66.80 | $144k | 18,542 | Dec 2, 2025 |
| Oct 15, 2025 | CYTK CYTOKINETICS INC | AGrant or award Common Stock | +199 | $62.80 | $12k | 20,692 | Oct 16, 2025 |
| Sep 2, 2025 | CYTK CYTOKINETICS INC | SOpen-market sale Common Stock10b5-1 | -2,150 | $48.67 | $105k | 20,493 | Sep 2, 2025 |
| Jul 15, 2025 | CYTK CYTOKINETICS INC | AGrant or award Common Stock | +328 | $38.01 | $12k | 22,643 | Jul 16, 2025 |
| May 14, 2025 | CYTK CYTOKINETICS INC | AGrant or award Common Stock | +7,333 | $0.00 | $0 | 22,315 | May 19, 2025 |
| May 14, 2025 | CYTK CYTOKINETICS INC | AGrant or award Non-Qualified Stock Option (Right to Buy)derivative | +10,880 | $0.00 | $0 | 10,880 | May 19, 2025 |
| Apr 15, 2025 | CYTK CYTOKINETICS INC | AGrant or award Common Stock | +324 | $38.56 | $12k | 14,982 | Apr 16, 2025 |
| Apr 3, 2025 | CYTK CYTOKINETICS INC | SOpen-market sale Common Stock10b5-1 | -450 | $39.43 | $18k | 14,658 | Apr 4, 2025 |
| Mar 4, 2025 | CYTK CYTOKINETICS INC | SOpen-market sale Common Stock10b5-1 | -900 | $42.50 | $38k | 15,108 | Mar 4, 2025 |
| Jan 2, 2025 | CYTK CYTOKINETICS INC | AGrant or award Common Stock | +255 | $48.93 | $12k | 16,008 | Jan 6, 2025 |
Questions about Robert Arthur Harrington
Answered from the filings on this page, as of the latest one.
Is Robert Arthur Harrington buying or selling?
In the last 12 months Robert Arthur Harrington reported 0 open-market buys worth $0 and 1 open-market sell worth $144k on SEC Form 4; the latest was sold $144k of CYTK on Dec 1, 2025. Grants, option exercises and tax withholding are not counted.
How did Robert Arthur Harrington's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Robert Arthur Harrington has 0.
Where does Robert Arthur Harrington file Form 4?
Robert Arthur Harrington has filed Form 4 at CYTK (CYTOKINETICS INC). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.