David L. Mahoney is Director at CORCEPT THERAPEUTICS INC (CORT). They have made 15 open-market trades across 2 companies since 2006, most recently 2026-08-18.
CIK 0001224091
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.
7 open-market purchases totalling $1.3M since 2006, against 8 sales. Across 7 scored buys the stock is down 3.9% at ninety days, and 4.2 points behind the S&P over the same stretch.
7 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| CORT | 1,133,539 | $124.6M |
| ADMS | 115,153 | $947K |
| SYMC | 16,959 | $403K |
| TRCA | 3,333 | $26K |
| Total | $125.9M |
Shares reported on the most recent Form 4, priced at the 2026-08-20 close.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 0% | 0% | 0% |
| Avg Move | -27.4% | -3.9% | -3.9% |
| Alpha | -21.6% | -4.2% | -4.2% |
| Scored | 7 | 7 | 7 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CORT | SELL · 10b5-1 | 2026-08-18 | 2026-08-20 | $118.25 | $12.3M | -6.8% | -6.6% | — |
| CORT | SELL | 2026-06-17 | 2026-06-18 | $84.53 | $1.7M | +8.8% | +12.4% | +37.4% |
| CORT | SELL | 2025-05-16 | 2025-05-20 | $74.23 | $4.1M | -4.5% | -4.9% | -4.4% |
| CORT | SELL · 10b5-1 | 2023-08-14 | 2023-08-16 | $30.95 | $774K | +5.1% | +9.2% | -17.0% |
| CORT | SELL | 2017-07-18 | 2017-07-20 | $12.50 | $575K | -5.4% | +10.5% | +42.1% |
| CORT | SELL | 2017-07-12 | 2017-07-20 | $12.50 | $87K | -5.4% | +10.5% | +42.1% |
| CORT | SELL | 2016-11-11 | 2016-11-14 | $9.35 | $281K | -5.6% | -14.9% | -13.0% |
| CORT | SELL | 2015-07-08 | 2015-07-09 | $5.74 | $194K | -27.4% | -3.9% | -3.9% |
| CORT | SELL | 2015-03-20 | 2015-03-24 | $5.85 | $182K | -27.4% | -3.9% | -3.9% |
| SYMC | SELL · 10b5-1 | 2014-12-15 | 2014-12-17 | $25.33 | $304K | -1.5% | +1.4% | +1.4% |
| CORT | BUY | 2014-05-09 | 2014-05-12 | $1.85 | $185K | -27.4% | -3.9% | -3.9% |
| SYMC | SELL | 2012-11-02 | 2012-11-06 | $18.79 | $984K | -1.5% | +1.4% | +1.4% |
| CORT | BUY | 2010-04-21 | 2010-04-23 | $1.66 | $81K | -27.4% | -3.9% | -3.9% |
| CORT | BUY | 2009-10-16 | 2009-10-20 | $1.38 | $193K | -27.4% | -3.9% | -3.9% |
| CORT | BUY | 2008-03-25 | 2008-03-27 | $2.77 | $196K | -27.4% | -3.9% | -3.9% |
| CORT | BUY | 2007-08-16 | 2007-08-20 | $2.10 | $200K | -27.4% | -3.9% | -3.9% |
| CORT | BUY | 2007-03-30 | 2007-04-03 | $1.00 | $200K | -27.4% | -3.9% | -3.9% |
| CORT | BUY | 2006-03-01 | 2006-03-03 | $5.05 | $101K | -27.4% | -3.9% | -3.9% |
| CORT | BUY | 2006-02-17 | 2006-02-22 | $5.03 | $104K | -27.4% | -3.9% | -3.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.