Reuben Jeffery III is Director at AFFILIATED MANAGERS GROUP, INC. (AMG). They have made 9 open-market trades across 3 companies since 2010, most recently 2026-06-04.
CIK 0001492280
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.
9 open-market purchases totalling $6.2M since 2010, never a sale. Across 8 scored buys the stock is up 3.1% at ninety days, and 2.0 points behind the S&P over the same stretch.
8 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| AMG | 34,274 | $13.2M |
| DRS | 25,649 | $908K |
| TRH | 500 | — |
| Total | $14.1M |
Shares reported on the most recent Form 4, priced at the 2026-06-05 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 | 38% | 63% | 63% |
| Avg Move | -2.3% | +1.7% | +3.1% |
| Alpha | -2.2% | -0.5% | -2.0% |
| Scored | 8 | 8 | 8 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| DRS | BUY | 2026-05-19 | 2026-05-19 | $42.77 | $1.1M | +10.8% | +6.4% | +4.7% |
| AMG | BUY | 2023-03-16 | 2023-03-17 | $137.21 | $1.0M | +2.2% | +5.5% | +11.9% |
| AMG | BUY | 2022-02-15 | 2022-02-16 | $143.96 | $504K | -10.7% | -1.9% | -11.3% |
| AMG | BUY | 2021-11-02 | 2021-11-03 | $188.39 | $1.0M | -3.7% | -12.8% | -22.3% |
| AMG | BUY | 2021-05-04 | 2021-05-06 | $160.49 | $401K | -8.5% | -6.7% | -7.4% |
| AMG | BUY | 2021-02-10 | 2021-02-11 | $145.53 | $364K | +1.5% | +2.7% | +9.2% |
| AMG | BUY | 2020-09-04 | 2020-09-08 | $70.16 | $351K | -1.0% | +11.4% | +39.6% |
| AMG | BUY | 2020-05-01 | 2020-05-04 | $65.21 | $1.3M | -8.9% | +9.1% | +0.0% |
| TRH | BUY | 2010-08-09 | 2010-08-09 | $47.78 | $191K | N/A | N/A | N/A |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.