SEIC: SEI Investments Co insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 3 sales totaling $3.75M in the last 180 days.
Insider sales
| Trade date | Insider | Role | Value | 10b5-1 plan |
|---|---|---|---|---|
| 2026-09-30 | West Alfred P Jr | Other | $566K | |
| 2026-09-29 | West Alfred P Jr | Other | $2.94M | |
| 2026-09-22 | Lane Michael | President | $247K |
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-08-14 | 13G amendment | Loomis, Sayles & Co., L.P. | 7.04% | SEC |
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