Spencer Davidson is Director at GENERAL AMERICAN INVESTORS CO INC (GAM). They have made 79 open-market trades across 2 companies since 2008, most recently 2026-09-23.
CIK 0001215920
11 open-market purchases totalling $1.6M since 2008, against 68 sales. Across 10 scored buys the stock is up 0.4% at ninety days, and 0.7 points behind the S&P over the same stretch.
11 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| GAM | 189,387 | $12.2M |
| MRX | 9,722 | $685K |
| Total | $12.8M |
Shares reported on the most recent Form 4, priced at the 2026-09-24 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 55% | 50% | 50% |
| Avg Move | -3.1% | +1.7% | +0.4% |
| Alpha | -23.0% | -0.3% | -0.7% |
| Scored | 11 | 10 | 10 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| GAM | BUY | 2026-09-23 | 2026-09-24 | $22.75 | $228K | +0.3% | — | — |
| GAM | SELL | 2018-04-23 | 2018-04-25 | $33.96 | $48K | +0.2% | +2.0% | +5.1% |
| GAM | SELL | 2018-04-20 | 2018-04-23 | $33.85 | $34K | -1.6% | +1.9% | +4.2% |
| GAM | SELL | 2018-04-18 | 2018-04-19 | $34.25 | $140K | -1.2% | +1.9% | +3.9% |
| GAM | BUY | 2017-12-20 | 2017-12-21 | $34.13 | $44K | +1.6% | +5.7% | +0.6% |
| GAM | BUY | 2017-12-15 | 2017-12-18 | $34.14 | $198K | +0.5% | +4.3% | +0.1% |
| GAM | BUY | 2017-12-14 | 2017-12-14 | $33.70 | $121K | +1.5% | +5.7% | +3.5% |
| GAM | BUY | 2017-12-13 | 2017-12-14 | $33.83 | $14K | +1.5% | +5.7% | +3.5% |
| GAM | SELL | 2017-04-05 | 2017-04-07 | $33.53 | $292K | -0.3% | +2.0% | +2.1% |
| GAM | SELL | 2017-04-03 | 2017-04-05 | $33.42 | $260K | -0.1% | +2.4% | +3.3% |
| GAM | SELL | 2017-03-30 | 2017-03-31 | $33.51 | $1.5M | +0.5% | +2.2% | +2.4% |
| GAM | SELL | 2017-03-28 | 2017-03-30 | $33.60 | $241K | +0.7% | +2.3% | +3.3% |
| GAM | SELL | 2017-03-27 | 2017-03-28 | $33.20 | $82K | +1.4% | +2.6% | +3.4% |
| GAM | SELL | 2017-03-17 | 2017-03-20 | $33.60 | $77K | -0.4% | -0.6% | +2.1% |
| GAM | SELL | 2017-03-15 | 2017-03-17 | $33.48 | $633K | -0.6% | -0.2% | +1.0% |
| GAM | SELL | 2017-03-13 | 2017-03-14 | $33.37 | $400K | -0.3% | +0.2% | +2.0% |
| GAM | SELL | 2017-02-02 | 2017-02-03 | $32.50 | $13K | +3.1% | +2.9% | +4.9% |
| GAM | SELL | 2016-10-26 | 2016-10-27 | $31.77 | $64K | +2.1% | -2.9% | +2.6% |
| GAM | SELL | 2016-10-24 | 2016-10-26 | $31.90 | $191K | +0.3% | -2.8% | +0.7% |
| GAM | SELL | 2016-10-10 | 2016-10-12 | $32.59 | $692K | -0.1% | -6.6% | +0.0% |
| GAM | SELL | 2016-09-22 | 2016-09-26 | $32.91 | $405K | +0.7% | -2.1% | -2.7% |
| GAM | SELL | 2016-09-16 | 2016-09-20 | $32.30 | $123K | +0.9% | -1.7% | -2.7% |
| GAM | SELL | 2016-08-18 | 2016-08-19 | $33.02 | $1.3M | +0.2% | -2.0% | -7.7% |
| GAM | SELL | 2016-06-22 | 2016-06-24 | $31.26 | $800K | +3.3% | +7.7% | +9.6% |
| GAM | SELL | 2016-06-13 | 2016-06-14 | $31.11 | $100K | -1.8% | +4.0% | +5.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.