Robert P. Mauch is President & VP at AMERISOURCEBERGEN CORP (ABC). They have made 27 open-market trades across 2 companies since 2015, most recently 2026-02-20.
CIK 0001633897
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 27 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| COR | 69,155 | $23.6M |
| ABC | 44,389 | $8.0M |
| Total | $31.6M |
Shares reported on the most recent Form 4, priced at the 2026-02-24 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 |
|---|---|---|---|---|---|---|---|---|
| COR | SELL | 2026-02-20 | 2026-02-24 | $358.94 | $1.4M | -1.8% | -12.9% | -25.8% |
| COR | SELL | 2026-02-18 | 2026-02-20 | $359.46 | $479K | +2.2% | -11.0% | -26.3% |
| COR | SELL | 2026-01-20 | 2026-01-22 | $354.73 | $1.8M | +2.9% | +4.2% | -12.3% |
| COR | SELL | 2025-12-18 | 2025-12-22 | $343.45 | $3.5M | +1.0% | +4.2% | -5.0% |
| COR | SELL · 10b5-1 | 2025-11-18 | 2025-11-19 | $366.64 | $3.7M | -2.7% | -5.4% | -0.2% |
| COR | SELL · 10b5-1 | 2025-10-20 | 2025-10-21 | $326.80 | $3.3M | +2.6% | +10.0% | +6.5% |
| COR | SELL · 10b5-1 | 2025-09-18 | 2025-09-22 | $290.00 | $1.5M | +6.3% | +13.9% | +17.1% |
| COR | SELL · 10b5-1 | 2025-08-18 | 2025-08-20 | $293.53 | $2.9M | -3.0% | -4.6% | +19.0% |
| COR | SELL · 10b5-1 | 2025-07-18 | 2025-07-22 | $294.11 | $2.9M | -1.7% | +3.4% | +11.6% |
| COR | SELL · 10b5-1 | 2025-06-18 | 2025-06-20 | $295.30 | $2.9M | -1.6% | -1.1% | -1.7% |
| COR | SELL · 10b5-1 | 2025-05-19 | 2025-05-21 | $291.43 | $2.9M | +0.2% | +0.9% | +1.3% |
| COR | SELL · 10b5-1 | 2025-04-21 | 2025-04-22 | $289.33 | $2.9M | +2.6% | +1.9% | +2.8% |
| COR | SELL · 10b5-1 | 2025-03-18 | 2025-03-19 | $260.93 | $2.6M | +4.4% | +5.6% | +10.1% |
| COR | SELL · 10b5-1 | 2025-03-03 | 2025-03-04 | $255.00 | $1.3M | +2.4% | +14.8% | +15.9% |
| COR | SELL | 2024-04-15 | 2024-04-17 | $235.09 | $27.1M | +0.2% | -7.2% | -5.9% |
| COR | SELL · 10b5-1 | 2023-09-25 | 2023-09-27 | $185.00 | $3.7M | +0.3% | +1.1% | +10.0% |
| ABC | SELL | 2022-11-04 | 2022-11-04 | $160.00 | $3.5M | -3.8% | +5.8% | -2.1% |
| ABC | SELL | 2022-02-01 | 2022-02-02 | $137.04 | $12.2M | +2.3% | +7.4% | +10.0% |
| ABC | SELL | 2021-11-02 | 2021-11-03 | $125.34 | $10.3M | -1.3% | -7.3% | +9.3% |
| ABC | SELL | 2021-01-06 | 2021-01-07 | $105.06 | $3.5M | -5.8% | -1.5% | +5.8% |
| ABC | SELL | 2020-12-14 | 2020-12-16 | $98.02 | $15.2M | -1.8% | +8.0% | +14.1% |
| ABC | SELL | 2020-08-20 | 2020-08-21 | $101.72 | $1.1M | -1.0% | -3.5% | +2.6% |
| ABC | SELL | 2020-07-20 | 2020-07-21 | $104.40 | $1.1M | -3.5% | -4.6% | -5.8% |
| ABC | SELL | 2020-06-19 | 2020-06-22 | $102.00 | $537K | -2.1% | +1.5% | -6.3% |
| ABC | SELL | 2020-05-20 | 2020-05-21 | $90.00 | $474K | +8.0% | +10.4% | +10.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.