🕵️ SEI Investments Co ($SEIC)
SEC insider & ownership activity, last 12 months · CIK 350894 · every row links its SEC filing
Over the last 12 months insiders sold $38.0M with no open-market buying against it. Alfred P. West Jr. sold $12.0M (Dec–Jun). 3 planned sales are pending, the largest $2.6M (Peterson Michael). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 10 sellers, $38.0M (33 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Alfred P. West Jr. | 0 | – | 10 | $12.0M | Jun 29, 2026 |
| Hicke Ryan | 0 | – | 4 | $10.1M | Jan 29, 2026 |
| Sharma Sanjay | 0 | – | 3 | $4.2M | Jul 24, 2026 |
| Peterson Michael | 0 | – | 5 | $4.1M | Apr 23, 2026 |
| Philip Mc Cabe | 0 | – | 2 | $2.4M | Apr 23, 2026 |
| McCarthy Kathryn | 0 | – | 2 | $1.8M | May 4, 2026 |
| Warner Mark Andrew | 0 | – | 3 | $1.1M | Apr 28, 2026 |
| William M Doran | 0 | – | 2 | $1.0M | Jun 9, 2026 |
| Guarino Carl | 0 | – | 1 | $864K | Sep 23, 2025 |
| Romeo Carmen | 0 | – | 1 | $420K | Nov 11, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Loomis, Sayles & Co., L.P. | 7.1% | 13G | May 14, 2026 | filing ↗ | |
| Blackrock, Inc. | 6.8% | 13G | Jul 16, 2025 | filing ↗ | |
| Vanguard Portfolio Management | 5.0% | 13G | Apr 29, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Warner Mark Andrew | $1.5M | Jul 28, 2026 | filing ↗ |
| Peterson Michael | $2.6M | Jul 28, 2026 | filing ↗ |
| Guarino Carl | $1.0M | Jul 28, 2026 | filing ↗ |
| Sharma Sanjay | $2.0M | Jul 24, 2026 | filing ↗ |
| Alfred P. West, JR. | $5.2M | Jun 26, 2026 | filing ↗ |
| William M Doran | $453K | Jun 9, 2026 | filing ↗ |
| McCarthy Kathryn | $911K | May 4, 2026 | filing ↗ |
| Warner Mark Andrew | $365K | Apr 28, 2026 | filing ↗ |
| Philip Mc Cabe | $1.8M | Apr 23, 2026 | filing ↗ |
| Peterson Michael | $900K | Apr 23, 2026 | filing ↗ |
| Sharma Sanjay | $2.3M | Apr 23, 2026 | filing ↗ |
| Alfred Paul West Jr. | $5.4M | Mar 10, 2026 | filing ↗ |
| Warner Mark Andrew | $327K | Feb 25, 2026 | filing ↗ |
| Hicke Ryan | $7.0M | Jan 29, 2026 | filing ↗ |
| Doran William | $587K | Dec 22, 2025 | filing ↗ |
| McCabe Philip | $973K | Dec 4, 2025 | filing ↗ |
| Alfred P. West Jr. | $2.0M | Dec 3, 2025 | filing ↗ |
| Peterson Michael | $2.1M | Nov 12, 2025 | filing ↗ |
| Romeo Carmen | $420K | Nov 11, 2025 | filing ↗ |
| McCarthy Kathryn | $857K | Sep 29, 2025 | filing ↗ |
| Guarino Carl | $864K | Sep 23, 2025 | filing ↗ |
| Stephanie D. Miller | $647K | Sep 22, 2025 | filing ↗ |
| Hicke Ryan | $3.1M | Aug 19, 2025 | filing ↗ |
| Peterson Michael | $1.1M | Jul 31, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Jul 22, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jul 22, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 22, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 27, 2026 | filing ↗ |
| Other events (8.01) | May 27, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 27, 2026 | filing ↗ |
| Earnings (2.02) | Apr 22, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 22, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 22, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 2, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 2, 2026 | filing ↗ |
| Earnings (2.02) | Jan 28, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 28, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 13, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 13, 2026 | filing ↗ |
| Officer/director changes (5.02) | Dec 12, 2025 | filing ↗ |
| Other events (8.01) | Dec 12, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 12, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 3, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 3, 2025 | filing ↗ |
| Earnings (2.02) | Oct 22, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 22, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 22, 2025 | filing ↗ |
| Other events (8.01) | Oct 20, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 18, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 18, 2025 | filing ↗ |
| Material agreement (1.01) | Aug 18, 2025 | filing ↗ |
| New financial obligation (2.03) | Aug 18, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 18, 2025 | filing ↗ |