Sean Brynjelsen is CEO & President at Eton Pharmaceuticals, Inc. (ETON). They have made 9 open-market trades across 1 company since 2018, most recently 2026-08-20.
CIK 0001669976
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.
6 open-market purchases totalling $264K since 2018, against 3 sales. Across 6 scored buys the stock is down 1.0% at ninety days, and 5.5 points behind the S&P over the same stretch.
6 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| ETON | 961,194 | $48.3M |
| SGNT | 9,844 | — |
| Total | $48.3M |
Shares reported on the most recent Form 4, priced at the 2026-08-20 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.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 83% | 50% | 33% |
| Avg Move | +5.6% | -0.6% | -1.0% |
| Alpha | +4.9% | -1.6% | -5.5% |
| Scored | 6 | 6 | 6 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ETON | SELL | 2026-08-19 | 2026-08-20 | $60.88 | $6.1M | +0.4% | -8.0% | — |
| ETON | SELL | 2026-05-28 | 2026-05-29 | $31.88 | $3.8M | +2.3% | +21.3% | +107.0% |
| ETON | SELL | 2025-06-03 | 2025-06-05 | $17.21 | $4.8M | -20.5% | -15.9% | +2.0% |
| ETON | BUY | 2022-09-22 | 2022-09-23 | $2.10 | $21K | +3.7% | -4.6% | +38.0% |
| ETON | BUY | 2021-08-20 | 2021-08-20 | $4.32 | $43K | +15.9% | +7.5% | -0.2% |
| ETON | BUY | 2021-06-03 | 2021-06-03 | $5.96 | $30K | +8.4% | -10.5% | -16.7% |
| ETON | BUY | 2019-08-13 | 2019-08-13 | $6.15 | $31K | -5.1% | +2.8% | -7.5% |
| ETON | BUY | 2019-05-20 | 2019-05-22 | $7.93 | $79K | +2.1% | -6.4% | -28.4% |
| ETON | BUY | 2018-11-15 | 2018-11-15 | $6.00 | $60K | +8.6% | +7.4% | +8.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.