Sean A. McCarthy is CEO & President at CytomX Therapeutics, Inc. (CTMX). They have made 35 open-market trades across 1 company since 2017, most recently 2026-03-17.
CIK 0001654058
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 35 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CTMX | 1,089,684 | $2.5M |
Shares reported on the most recent Form 4, priced at the 2026-10-16 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 |
|---|---|---|---|---|---|---|---|---|
| CTMX | SELL | 2026-03-17 | 2026-03-19 | $6.42 | $1.5M | +1.7% | +6.0% | -36.0% |
| CTMX | SELL · 10b5-1 | 2025-11-06 | 2025-11-10 | $4.54 | $924K | -10.0% | -6.9% | +36.0% |
| CTMX | SELL · 10b5-1 | 2025-11-06 | 2026-10-16 | $4.54 | $462K | N/A | N/A | N/A |
| CTMX | SELL | 2025-06-16 | 2025-06-17 | $2.69 | $299K | -5.0% | -0.4% | -16.7% |
| CTMX | SELL | 2025-03-18 | 2025-03-20 | $0.60 | $23K | -10.1% | +16.3% | +227.1% |
| CTMX | SELL | 2024-08-20 | 2024-08-22 | $1.23 | $17K | +5.0% | -3.4% | -26.9% |
| CTMX | SELL | 2024-03-19 | 2024-03-21 | $2.09 | $42K | -2.7% | -24.4% | -42.1% |
| CTMX | SELL | 2023-12-20 | 2023-12-22 | $1.38 | $19K | +3.4% | +11.6% | +53.4% |
| CTMX | SELL | 2023-09-22 | 2023-09-22 | $1.30 | $19K | -3.2% | +1.6% | +11.9% |
| CTMX | SELL | 2023-03-16 | 2023-03-20 | $1.88 | $13K | -20.0% | -8.1% | -17.3% |
| CTMX | SELL | 2022-07-20 | 2022-07-21 | $1.42 | $21K | +5.5% | +6.2% | -8.9% |
| CTMX | SELL | 2021-06-16 | 2021-06-21 | $7.04 | $704K | -8.1% | -15.9% | -25.9% |
| CTMX | SELL | 2021-03-31 | 2021-04-02 | $7.49 | $749K | -8.8% | +19.9% | -18.8% |
| CTMX | SELL | 2020-05-12 | 2020-05-14 | $15.00 | $540K | -3.1% | -13.8% | -24.2% |
| CTMX | SELL | 2018-11-01 | 2018-11-05 | $15.00 | $98K | +0.9% | -1.3% | +36.2% |
| CTMX | SELL | 2018-09-04 | 2018-09-06 | $21.86 | $571K | -6.3% | -18.2% | -31.3% |
| CTMX | SELL | 2018-07-05 | 2018-07-09 | $25.06 | $225K | -2.2% | +1.4% | -34.3% |
| CTMX | SELL | 2018-07-03 | 2018-07-06 | $25.09 | $102K | -2.5% | -3.1% | -30.9% |
| CTMX | SELL | 2018-07-02 | 2018-07-03 | $23.42 | $611K | -7.0% | +2.6% | -25.5% |
| CTMX | SELL | 2018-05-01 | 2018-05-02 | $26.55 | $1.0M | -11.9% | -3.6% | -0.5% |
| CTMX | SELL | 2018-03-01 | 2018-03-05 | $29.43 | $1.2M | +4.4% | -10.0% | -34.5% |
| CTMX | SELL | 2018-01-05 | 2018-01-09 | $25.01 | $326K | +5.4% | +8.1% | +13.9% |
| CTMX | SELL | 2018-01-02 | 2018-01-04 | $21.04 | $549K | +9.3% | +14.0% | +25.3% |
| CTMX | SELL | 2017-12-01 | 2017-12-05 | $20.60 | $295K | +5.0% | +11.3% | +58.9% |
| CTMX | SELL | 2017-11-01 | 2017-11-03 | $19.86 | $570K | -1.4% | +2.6% | +35.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.