William F. Feehery is CEO at Certara, Inc. (CERT). They have made 16 open-market trades across 1 company since 2021, most recently 2026-05-04.
CIK 0001543193
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.
1 open-market purchase totalling $400K since 2025, against 15 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CERT | 2,360,769 | $22.1M |
| WST | 32,519 | $12.5M |
| Total | $34.6M |
Shares reported on the most recent Form 4, priced at the 2026-05-06 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 |
|---|---|---|---|---|---|---|---|---|
| CERT | BUY | 2025-11-11 | 2025-11-12 | $8.30 | $400K | +7.3% | +3.9% | -15.3% |
| CERT | SELL | 2022-03-16 | 2022-03-17 | $20.17 | $2.5M | +10.7% | +0.3% | -7.8% |
| CERT | SELL | 2022-03-11 | 2022-03-14 | $20.29 | $1.1M | +21.6% | +18.3% | -0.8% |
| CERT | SELL | 2022-02-18 | 2022-02-22 | $23.35 | $3.5M | -15.6% | -6.4% | -15.9% |
| CERT | SELL | 2022-02-17 | 2022-02-22 | $24.32 | $4.4M | -15.6% | -6.4% | -15.9% |
| CERT | SELL | 2022-01-26 | 2022-01-27 | $25.37 | $3.8M | +12.4% | +6.6% | -21.0% |
| CERT | SELL | 2021-12-22 | 2021-12-23 | $28.58 | $2.1M | -13.5% | -7.8% | -26.6% |
| CERT | SELL | 2021-12-07 | 2021-12-08 | $27.77 | $3.9M | -3.5% | -10.6% | -34.0% |
| CERT | SELL | 2021-12-03 | 2021-12-06 | $26.02 | $1.8M | -1.9% | -6.2% | -29.4% |
| CERT | SELL | 2021-11-24 | 2021-11-26 | $28.43 | $8.2M | +2.6% | +6.0% | -16.7% |
| CERT | SELL | 2021-11-19 | 2021-11-22 | $30.31 | $2.1M | -7.9% | +2.4% | -18.0% |
| CERT | SELL | 2021-10-27 | 2021-10-28 | $39.24 | $2.9M | +2.3% | -30.8% | -39.4% |
| CERT | SELL | 2021-09-22 | 2021-09-23 | $36.37 | $5.5M | -6.9% | +10.8% | -19.1% |
| CERT | SELL | 2021-08-25 | 2021-08-26 | $31.28 | $4.7M | +11.8% | +12.0% | -9.4% |
| CERT | SELL | 2021-07-28 | 2021-07-30 | $26.16 | $2.0M | +3.2% | +20.9% | +51.4% |
| CERT | SELL | 2021-06-23 | 2021-06-24 | $26.53 | $2.0M | -2.7% | -1.2% | +33.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.