Mari Doerfler is President & VP +1 at Owens Corning (OC). They have made 5 open-market trades across 1 company since 2023, most recently 2026-05-08.
CIK 0001957375
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 5 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| OC | 3,093 | $349K |
Shares reported on the most recent Form 4, priced at the 2026-05-12 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 |
|---|---|---|---|---|---|---|---|---|
| OC | SELL | 2026-05-08 | 2026-05-12 | $120.92 | $233K | -1.1% | +2.2% | +29.3% |
| OC | SELL | 2025-08-12 | 2025-08-14 | $149.00 | $66K | +0.1% | -0.3% | -32.6% |
| OC | SELL | 2024-06-12 | 2024-06-17 | $182.05 | $44K | -1.6% | -2.0% | -5.0% |
| OC | SELL | 2023-12-12 | 2023-12-14 | $143.81 | $101K | -2.5% | -3.0% | +6.4% |
| OC | SELL | 2023-06-07 | 2023-06-09 | $117.91 | $35K | +5.1% | +9.2% | +21.3% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.