Donald Arthur Seibel Jr. is Director at ACNB CORP (ACNB). They have made 9 open-market trades across 1 company since 2017, most recently 2026-09-15.
CIK 0001710898
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.
5 open-market purchases totalling $12K since 2017, against 4 sales. Across 5 scored buys the stock is up 6.4% at ninety days, and 5.9 points ahead of the S&P over the same stretch.
5 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| ACNB | 5,524 | $351K |
Shares reported on the most recent Form 4, priced at the 2026-09-17 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 40% | 80% | 80% |
| Avg Move | -0.8% | +0.7% | +6.4% |
| Alpha | -0.3% | +0.2% | +5.9% |
| Scored | 5 | 5 | 5 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ACNB | SELL | 2025-12-11 | 2025-12-12 | $51.00 | $255K | -4.4% | -7.7% | -10.6% |
| ACNB | SELL | 2022-11-23 | 2022-11-28 | $38.95 | $924K | -2.1% | +3.6% | -2.4% |
| ACNB | SELL | 2019-02-25 | 2019-02-27 | $41.00 | $13K | -7.3% | -5.8% | -5.0% |
| ACNB | SELL | 2018-12-19 | 2018-12-28 | $38.08 | $484K | -3.2% | -5.6% | -7.5% |
| ACNB | BUY | 2018-09-14 | 2018-09-20 | $39.48 | $2K | -7.1% | -5.7% | +0.7% |
| ACNB | BUY | 2018-06-15 | 2018-06-21 | $31.70 | $2K | +6.4% | +6.4% | +17.5% |
| ACNB | BUY | 2018-03-15 | 2018-03-21 | $29.61 | $2K | -2.7% | +0.7% | +7.1% |
| ACNB | BUY | 2017-12-15 | 2017-12-20 | $29.23 | $2K | -1.2% | +1.5% | -0.5% |
| ACNB | BUY | 2017-09-15 | 2017-09-21 | $27.22 | $3K | +0.5% | +0.5% | +7.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.