John T. Henderson is Director at CYTOKINETICS INC (CYTK). They have made 17 open-market trades across 2 companies since 2009, most recently 2026-07-15.
CIK 0001226488
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
4 open-market purchases totalling $337K since 2009, against 13 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CYTK | 78,360 | $4.9M |
| MYGN | 76,040 | $302K |
| MYRX | 8,500 | — |
| Total | $5.2M |
Shares reported on the most recent Form 4, priced at the 2026-07-16 close. 1 holding could not be priced and is excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CYTK | SELL | 2026-05-05 | 2026-05-05 | $75.97 | $1.5M | -3.1% | -7.6% | -2.3% |
| CYTK | SELL · 10b5-1 | 2025-12-02 | 2025-12-02 | $63.90 | $559K | -0.5% | -3.1% | -3.5% |
| CYTK | SELL | 2025-04-15 | 2025-04-16 | $38.66 | $247K | +6.5% | -20.0% | -2.0% |
| CYTK | SELL | 2024-12-11 | 2024-12-12 | $50.42 | $179K | -3.1% | -6.8% | -12.2% |
| CYTK | SELL · 10b5-1 | 2024-04-25 | 2024-04-25 | $64.54 | $1.4M | +0.4% | -25.8% | -12.6% |
| CYTK | SELL · 10b5-1 | 2024-02-14 | 2024-02-14 | $76.48 | $382K | +5.4% | -15.1% | -22.7% |
| CYTK | SELL · 10b5-1 | 2024-01-12 | 2024-01-12 | $85.14 | $426K | +0.5% | -3.9% | -11.3% |
| CYTK | SELL · 10b5-1 | 2023-12-18 | 2023-12-19 | $36.34 | $179K | +128.1% | +124.3% | +72.9% |
| CYTK | SELL · 10b5-1 | 2023-05-15 | 2023-05-15 | $37.77 | $315K | -2.0% | -8.6% | -16.2% |
| CYTK | SELL | 2022-09-12 | 2022-09-12 | $54.94 | $2.0M | -2.4% | -9.2% | -27.4% |
| CYTK | SELL | 2021-11-05 | 2021-11-05 | $40.00 | $340K | -5.0% | -12.6% | -22.4% |
| CYTK | SELL · 10b5-1 | 2021-04-01 | 2021-04-05 | $23.66 | $53K | +0.2% | -5.0% | -21.3% |
| CYTK | SELL · 10b5-1 | 2020-12-31 | 2020-12-31 | $20.31 | $17K | -7.3% | -2.9% | +11.9% |
| CYTK | SELL · 10b5-1 | 2020-10-05 | 2020-10-05 | $29.00 | $87K | -44.1% | -39.1% | -32.6% |
| CYTK | BUY | 2019-11-19 | 2020-01-02 | $8.57 | $51K | +20.5% | +23.0% | +5.9% |
| MYGN | BUY | 2019-11-07 | 2019-11-07 | $23.46 | $164K | +7.2% | +6.7% | +25.9% |
| MYGN | SELL | 2018-07-11 | 2018-07-13 | $42.06 | $1.3M | +2.6% | -1.2% | +2.9% |
| MYGN | SELL | 2017-09-01 | 2017-09-05 | $30.31 | $606K | +4.9% | +16.6% | +7.1% |
| MYGN | BUY | 2017-02-22 | 2017-02-23 | $18.66 | $112K | +0.7% | +1.4% | +7.8% |
| MYGN | SELL | 2016-09-09 | 2016-09-13 | $20.50 | $1.2M | +3.2% | -11.3% | -15.9% |
| MYGN | SELL | 2014-06-05 | 2014-06-06 | $35.70 | $179K | -0.5% | +0.9% | +0.9% |
| MYGN | SELL | 2014-03-07 | 2014-03-11 | $37.86 | $757K | -0.5% | +0.9% | +0.9% |
| MYGN | SELL | 2014-03-05 | 2014-03-07 | $37.59 | $188K | -0.5% | +0.9% | +0.9% |
| MYGN | SELL | 2012-12-10 | 2012-12-11 | $27.66 | $1.1M | -0.5% | +0.9% | +0.9% |
| MYGN | BUY | 2009-05-13 | 2009-05-14 | $32.73 | $10K | -0.5% | +0.9% | +0.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.