Alfred P. West Jr. is Chairman at SEI INVESTMENTS CO (SEIC). They have made 167 open-market trades across 3 companies since 2006, most recently 2026-09-30.
CIK 0001059374
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 167 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| SEI | 11,441,864 | $717.7M |
| SEIC | 6,784,574 | $708.1M |
| SECI | 12,106,314 | — |
| Total | $1.4B |
Shares reported on the most recent Form 4, priced at the 2026-10-01 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 | 82% | 79% | 81% |
| Avg Move | -7.5% | -0.4% | +0.2% |
| Scored | 149 | 149 | 149 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| SEIC | SELL | 2026-09-29 | 2026-10-01 | $103.36 | $3.5M | +0.8% | — | — |
| SEIC | SELL | 2026-06-26 | 2026-06-29 | $87.26 | $5.0M | +10.0% | +18.5% | +20.9% |
| SEIC | SELL | 2026-03-10 | 2026-03-12 | $80.12 | $5.0M | -1.8% | -1.2% | +11.3% |
| SEIC | SELL | 2025-12-03 | 2025-12-05 | $80.87 | $4.0M | +2.6% | +7.4% | +1.3% |
| SEIC | SELL | 2025-05-28 | 2025-05-30 | $84.82 | $17.6M | -1.9% | +6.1% | +4.9% |
| SEIC | SELL | 2025-03-05 | 2025-03-07 | $76.28 | $209K | +0.6% | -10.3% | +12.6% |
| SEIC | SELL | 2025-03-03 | 2025-03-05 | $77.91 | $22.7M | -1.8% | -9.5% | +11.4% |
| SEIC | SELL | 2024-12-13 | 2024-12-17 | $85.55 | $25.0M | -2.9% | -2.5% | -11.9% |
| SEIC | SELL | 2024-12-04 | 2024-12-06 | $82.91 | $4.1M | -4.3% | -3.0% | -9.9% |
| SEIC | SELL | 2024-11-07 | 2024-11-12 | $80.29 | $19.6M | -0.1% | +7.0% | +4.2% |
| SEIC | SELL | 2024-08-29 | 2024-08-30 | $67.50 | $383K | -1.1% | +2.8% | +22.8% |
| SEIC | SELL | 2024-08-27 | 2024-08-28 | $67.10 | $9.5M | -1.1% | +2.6% | +22.0% |
| SEIC | SELL | 2024-08-23 | 2024-08-27 | $67.52 | $9.7M | -1.5% | +2.4% | +21.2% |
| SEIC | SELL | 2024-05-13 | 2024-05-14 | $68.09 | $3.3M | +0.3% | -4.4% | -5.4% |
| SEIC | SELL | 2024-05-09 | 2024-05-13 | $68.61 | $9.6M | -0.4% | -3.8% | -5.5% |
| SEIC | SELL | 2024-03-28 | 2024-04-01 | $72.14 | $2.8M | -2.7% | -6.4% | -8.7% |
| SEIC | SELL | 2024-03-26 | 2024-03-28 | $70.75 | $10.6M | -3.8% | -7.4% | -9.8% |
| SEIC | SELL | 2023-12-01 | 2023-12-04 | $59.79 | $3.8M | +5.1% | +3.9% | +13.9% |
| SEIC | SELL | 2023-11-22 | 2023-11-22 | $57.91 | $2.1M | +3.5% | +12.2% | +15.1% |
| SEIC | SELL | 2023-11-17 | 2023-11-21 | $57.99 | $19.1M | +4.2% | +11.7% | +14.9% |
| SEIC | SELL | 2023-09-11 | 2023-09-13 | $60.45 | $16.0M | -0.2% | -7.3% | -0.5% |
| SEIC | SELL | 2023-06-23 | 2023-06-26 | $56.96 | $6.9M | +3.0% | +11.1% | +5.7% |
| SEIC | SELL | 2023-06-20 | 2023-06-22 | $58.50 | $17.2M | +3.0% | +11.6% | +6.7% |
| SEIC | SELL | 2023-03-29 | 2023-03-29 | $56.06 | $1.8M | +1.2% | +3.6% | +3.3% |
| SEIC | SELL | 2023-02-09 | 2023-02-09 | $62.99 | $3.7M | -3.8% | -11.4% | -6.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.