Joseph Douglas Lyon is CAO at CORCEPT THERAPEUTICS INC (CORT). They have made 11 open-market trades across 1 company since 2020, most recently 2026-10-02.
CIK 0001817838
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.
0 open-market purchases, against 11 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CORT | 5,683 | $450K |
Shares reported on the most recent Form 4, priced at the 2026-10-05 close.
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 |
|---|---|---|---|---|---|---|---|---|
| CORT | SELL · 10b5-1 | 2026-10-01 | 2026-10-05 | $116.07 | $1.2M | -6.2% | -34.4% | — |
| CORT | SELL · 10b5-1 | 2026-09-14 | 2026-09-16 | $113.49 | $1.1M | +2.3% | -2.7% | — |
| CORT | SELL | 2026-08-03 | 2026-08-05 | $114.16 | $176K | +6.1% | +1.0% | -25.8% |
| CORT | SELL | 2026-05-27 | 2026-05-29 | $65.00 | $325K | +12.9% | +27.0% | +69.0% |
| CORT | SELL · 10b5-1 | 2025-12-01 | 2025-12-03 | $79.53 | $398K | +3.5% | -54.7% | -58.2% |
| CORT | SELL · 10b5-1 | 2025-11-03 | 2025-11-05 | $73.65 | $368K | -1.8% | +12.5% | -46.8% |
| CORT | SELL · 10b5-1 | 2025-10-01 | 2025-10-03 | $84.71 | $796K | -13.1% | -16.0% | -56.8% |
| CORT | SELL · 10b5-1 | 2025-09-02 | 2025-09-04 | $70.25 | $695K | +2.4% | +29.0% | +20.2% |
| CORT | SELL · 10b5-1 | 2025-08-01 | 2025-08-05 | $67.51 | $786K | +3.2% | -0.2% | +6.7% |
| CORT | SELL · 10b5-1 | 2025-07-17 | 2025-07-21 | $73.48 | $584K | -4.2% | +0.4% | +12.1% |
| CORT | SELL · 10b5-1 | 2025-07-01 | 2025-07-03 | $73.51 | $7K | +1.8% | +0.3% | +17.8% |
| CORT | SELL · 10b5-1 | 2025-06-02 | 2025-06-04 | $78.01 | $736K | +2.1% | -2.8% | +2.8% |
| CORT | SELL · 10b5-1 | 2025-05-01 | 2025-05-05 | $71.96 | $1.3M | +9.1% | +4.1% | +6.7% |
| CORT | SELL · 10b5-1 | 2025-03-31 | 2025-04-02 | $100.49 | $39.8M | -14.8% | -8.1% | -12.4% |
| CORT | SELL · 10b5-1 | 2025-03-24 | 2025-03-26 | $60.58 | $26K | +31.4% | +26.2% | +35.1% |
| CORT | SELL · 10b5-1 | 2025-03-03 | 2025-03-04 | $60.69 | $556K | -0.0% | +41.7% | +28.0% |
| CORT | SELL · 10b5-1 | 2025-02-03 | 2025-02-05 | $66.92 | $335K | +6.6% | -18.7% | +3.9% |
| CORT | SELL · 10b5-1 | 2025-01-02 | 2025-01-06 | $50.39 | $252K | +7.4% | +32.9% | +45.0% |
| CORT | SELL | 2024-11-22 | 2024-11-26 | $56.72 | $160K | +0.7% | -8.9% | +5.0% |
| CORT | SELL · 10b5-1 | 2024-07-01 | 2024-07-03 | $32.49 | $162K | +9.9% | +16.3% | +54.1% |
| CORT | SELL · 10b5-1 | 2024-06-03 | 2024-06-05 | $30.18 | $151K | -16.6% | -12.3% | -0.1% |
| CORT | SELL · 10b5-1 | 2024-05-09 | 2024-05-13 | $26.00 | $188K | -0.1% | +17.1% | +22.4% |
| CORT | SELL · 10b5-1 | 2024-05-02 | 2024-05-06 | $26.00 | $282K | +13.9% | +42.5% | +42.8% |
| CORT | SELL · 10b5-1 | 2024-04-04 | 2024-04-08 | $26.00 | $142K | -6.8% | +4.4% | +21.3% |
| CORT | SELL · 10b5-1 | 2024-04-01 | 2024-04-03 | $26.01 | $13K | -10.4% | -5.1% | +22.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.