SEI Investments Company (SEIC) — insider trading
Financials · NASDAQ
SEI Investments Company (SEIC) has 83 reported SEC Form 4 insider transactions in our data, including 31 open-market sales among the most recent 83 (latest 2026-09-30).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-30 | WEST ALFRED P JR | Other | Open-market sale | 5,483 | $103.16 | $565.6K | Form 4 |
| 2026-09-29 | WEST ALFRED P JR | Other | Open-market sale | 28,394 | $103.40 | $2.94M | Form 4 |
| 2026-09-22 | LANE MICHAEL | Officer (Executive Vice President) | Open-market sale | 2,400 | $102.78 | $246.7K | Form 4 |
| 2026-09-03 | Hicke Ryan | Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 20,000 | — | — | Form 4 |
| 2026-09-03 | Hicke Ryan | Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 17,500 | — | — | Form 4 |
| 2026-09-03 | Hicke Ryan | Officer (Chief Executive Officer) | Open-market sale | 37,500 | $110.71 | $4.15M | Form 4 |
| 2026-09-03 | Hicke Ryan | Officer (Chief Executive Officer) | Option exercise / conversion | 20,000 | $64.43 | $1.29M | Form 4 |
| 2026-09-03 | Hicke Ryan | Officer (Chief Executive Officer) | Option exercise / conversion | 17,500 | $48.47 | $848.2K | Form 4 |
| 2026-09-01 | ROMEO CARMEN | Director | Option exercise / conversion (derivative) | 5,000 | — | — | Form 4 |
| 2026-09-01 | ROMEO CARMEN | Director | Open-market sale | 5,000 | $109.70 | $548.5K | Form 4 |
| 2026-09-01 | ROMEO CARMEN | Director | Option exercise / conversion | 5,000 | $49.63 | $248.2K | Form 4 |
| 2026-08-28 | Peterson Michael | Officer (Executive Vice President) | Option exercise / conversion (derivative) | 37,500 | — | — | Form 4 |
| 2026-08-28 | Peterson Michael | Officer (Executive Vice President) | Open-market sale | 37,500 | $111.51 | $4.18M | Form 4 |
| 2026-08-28 | Peterson Michael | Officer (Executive Vice President) | Option exercise / conversion | 37,500 | $56.54 | $2.12M | Form 4 |
| 2026-08-05 | McCabe Philip | Officer (See Remarks) | Option exercise / conversion (derivative) | 5,043 | — | — | Form 4 |
| 2026-08-05 | McCabe Philip | Officer (See Remarks) | Open-market sale | 5,043 | $105.50 | $532.0K | Form 4 |
| 2026-08-05 | McCabe Philip | Officer (See Remarks) | Option exercise / conversion | 5,043 | $49.63 | $250.3K | Form 4 |
| 2026-08-04 | McCabe Philip | Officer (See Remarks) | Option exercise / conversion (derivative) | 15,000 | — | — | Form 4 |
| 2026-08-04 | McCabe Philip | Officer (See Remarks) | Option exercise / conversion (derivative) | 9,957 | — | — | Form 4 |
| 2026-08-04 | McCabe Philip | Officer (See Remarks) | Open-market sale | 24,957 | $105.04 | $2.62M | Form 4 |
| 2026-08-04 | McCabe Philip | Officer (See Remarks) | Option exercise / conversion | 15,000 | $49.63 | $744.5K | Form 4 |
| 2026-08-04 | McCabe Philip | Officer (See Remarks) | Option exercise / conversion | 9,957 | $49.63 | $494.2K | Form 4 |
| 2026-08-03 | MCCARTHY KATHRYN | Director | Option exercise / conversion (derivative) | 5,000 | — | — | Form 4 |
| 2026-08-03 | MCCARTHY KATHRYN | Director | Option exercise / conversion (derivative) | 5,000 | — | — | Form 4 |
| 2026-08-03 | MCCARTHY KATHRYN | Director | Open-market sale | 10,000 | $103.54 | $1.04M | Form 4 |
| 2026-08-03 | MCCARTHY KATHRYN | Director | Option exercise / conversion | 5,000 | $71.12 | $355.6K | Form 4 |
| 2026-08-03 | MCCARTHY KATHRYN | Director | Option exercise / conversion | 5,000 | $71.12 | $355.6K | Form 4 |
| 2026-07-28 | GUARINO CARL | Director | Option exercise / conversion (derivative) | 5,000 | — | — | Form 4 |
| 2026-07-28 | GUARINO CARL | Director | Option exercise / conversion (derivative) | 5,000 | — | — | Form 4 |
| 2026-07-28 | GUARINO CARL | Director | Open-market sale | 10,000 | $103.20 | $1.03M | Form 4 |
| 2026-07-28 | GUARINO CARL | Director | Option exercise / conversion | 5,000 | $49.63 | $248.2K | Form 4 |
| 2026-07-28 | GUARINO CARL | Director | Option exercise / conversion | 5,000 | $49.63 | $248.2K | Form 4 |
| 2026-07-28 | Peterson Michael | Officer (Executive Vice President) | Option exercise / conversion (derivative) | 25,000 | — | — | Form 4 |
| 2026-07-28 | Peterson Michael | Officer (Executive Vice President) | Open-market sale | 25,000 | $102.05 | $2.55M | Form 4 |
| 2026-07-28 | Peterson Michael | Officer (Executive Vice President) | Option exercise / conversion | 25,000 | $55.73 | $1.39M | Form 4 |
| 2026-07-28 | Warner Mark Andrew | Officer (See Remarks*) | Option exercise / conversion (derivative) | 5,000 | — | — | Form 4 |
| 2026-07-28 | Warner Mark Andrew | Officer (See Remarks*) | Option exercise / conversion (derivative) | 5,000 | — | — | Form 4 |
| 2026-07-28 | Warner Mark Andrew | Officer (See Remarks*) | Option exercise / conversion (derivative) | 2,500 | — | — | Form 4 |
| 2026-07-28 | Warner Mark Andrew | Officer (See Remarks*) | Option exercise / conversion (derivative) | 2,500 | — | — | Form 4 |
| 2026-07-28 | Warner Mark Andrew | Officer (See Remarks*) | Open-market sale | 7,400 | $102.97 | $762.0K | Form 4 |
| 2026-07-28 | Warner Mark Andrew | Officer (See Remarks*) | Open-market sale | 5,300 | $102.01 | $540.7K | Form 4 |
| 2026-07-28 | Warner Mark Andrew | Officer (See Remarks*) | Open-market sale | 2,300 | $101.11 | $232.5K | Form 4 |
| 2026-07-28 | Warner Mark Andrew | Officer (See Remarks*) | Option exercise / conversion | 5,000 | $56.54 | $282.7K | Form 4 |
| 2026-07-28 | Warner Mark Andrew | Officer (See Remarks*) | Option exercise / conversion | 5,000 | $56.54 | $282.7K | Form 4 |
| 2026-07-28 | Warner Mark Andrew | Officer (See Remarks*) | Option exercise / conversion | 2,500 | $64.43 | $161.1K | Form 4 |
| 2026-07-28 | Warner Mark Andrew | Officer (See Remarks*) | Option exercise / conversion | 2,500 | $64.43 | $161.1K | Form 4 |
| 2026-07-24 | Shah Sneha S. | Officer (See Remarks*) | Shares withheld for taxes / exercise cost | 3,746 | $96.73 | $362.4K | Form 4 |
| 2026-07-24 | Sharma Sanjay | Officer (See Remarks*) | Option exercise / conversion (derivative) | 10,000 | — | — | Form 4 |
| 2026-07-24 | Sharma Sanjay | Officer (See Remarks*) | Option exercise / conversion (derivative) | 10,000 | — | — | Form 4 |
| 2026-07-24 | Sharma Sanjay | Officer (See Remarks*) | Open-market sale | 20,000 | $99.33 | $1.99M | Form 4 |
| 2026-07-24 | Sharma Sanjay | Officer (See Remarks*) | Option exercise / conversion | 10,000 | $71.12 | $711.2K | Form 4 |
| 2026-07-24 | Sharma Sanjay | Officer (See Remarks*) | Option exercise / conversion | 10,000 | $71.12 | $711.2K | Form 4 |
| 2026-06-29 | WEST ALFRED P JR | Other | Open-market sale | 1,680 | $88.09 | $148.0K | Form 4 |
| 2026-06-29 | WEST ALFRED P JR | Other | Open-market sale | 5,652 | $87.18 | $492.7K | Form 4 |
| 2026-06-26 | WEST ALFRED P JR | Other | Open-market sale | 3,838 | $87.67 | $336.5K | Form 4 |
| 2026-06-26 | WEST ALFRED P JR | Other | Open-market sale | 46,162 | $87.21 | $4.03M | Form 4 |
| 2026-06-09 | DORAN WILLIAM | Director | Open-market sale | 5,000 | $90.50 | $452.5K | Form 4 |
| 2026-05-04 | MCCARTHY KATHRYN | Director | Option exercise / conversion (derivative) | 5,000 | — | — | Form 4 |
| 2026-05-04 | MCCARTHY KATHRYN | Director | Option exercise / conversion (derivative) | 5,000 | — | — | Form 4 |
| 2026-05-04 | MCCARTHY KATHRYN | Director | Open-market sale | 10,000 | $91.07 | $910.7K | Form 4 |
| 2026-05-04 | MCCARTHY KATHRYN | Director | Option exercise / conversion | 5,000 | $49.63 | $248.2K | Form 4 |
| 2026-05-04 | MCCARTHY KATHRYN | Director | Option exercise / conversion | 5,000 | $49.63 | $248.2K | Form 4 |
| 2026-04-28 | Warner Mark Andrew | Officer (In Remarks) | Option exercise / conversion (derivative) | 2,000 | — | — | Form 4 |
| 2026-04-28 | Warner Mark Andrew | Officer (In Remarks) | Option exercise / conversion (derivative) | 2,000 | — | — | Form 4 |
| 2026-04-28 | Warner Mark Andrew | Officer (In Remarks) | Open-market sale | 4,000 | $91.16 | $364.6K | Form 4 |
| 2026-04-28 | Warner Mark Andrew | Officer (In Remarks) | Option exercise / conversion | 4,000 | $48.47 | $193.9K | Form 4 |
| 2026-04-23 | McCabe Philip | Officer (See Remarks) | Open-market sale | 15,000 | $91.82 | $1.38M | Form 4 |
| 2026-04-23 | Peterson Michael | Officer (EXECUTIVE VICE PRESIDENT) | Option exercise / conversion (derivative) | 10,000 | — | — | Form 4 |
| 2026-04-23 | Peterson Michael | Officer (EXECUTIVE VICE PRESIDENT) | Open-market sale | 10,000 | $90.00 | $900.0K | Form 4 |
| 2026-04-23 | Peterson Michael | Officer (EXECUTIVE VICE PRESIDENT) | Option exercise / conversion | 10,000 | $48.47 | $484.7K | Form 4 |
| 2026-04-23 | Sharma Sanjay | Officer (See Remarks*) | Option exercise / conversion (derivative) | 12,500 | — | — | Form 4 |
| 2026-04-23 | Sharma Sanjay | Officer (See Remarks*) | Option exercise / conversion (derivative) | 12,500 | — | — | Form 4 |
| 2026-04-23 | Sharma Sanjay | Officer (See Remarks*) | Open-market sale | 1,559 | $90.73 | $141.4K | Form 4 |
| 2026-04-23 | Sharma Sanjay | Officer (See Remarks*) | Open-market sale | 23,441 | $90.08 | $2.11M | Form 4 |
| 2026-04-23 | Sharma Sanjay | Officer (See Remarks*) | Option exercise / conversion | 12,500 | $49.63 | $620.4K | Form 4 |
| 2026-04-23 | Sharma Sanjay | Officer (See Remarks*) | Option exercise / conversion | 12,500 | $49.63 | $620.4K | Form 4 |
| 2026-03-31 | Hicke Ryan | Director, Officer (CHIEF EXECUTIVE OFFICER) | Shares withheld for taxes / exercise cost | 4,349 | $77.21 | $335.8K | Form 4 |
| 2026-03-18 | Denham Sean | Officer (Executive VP, CFO, COO) | Shares withheld for taxes / exercise cost | 7,673 | $78.77 | $604.4K | Form 4 |
| 2026-03-11 | WEST ALFRED P JR | Other | Open-market sale | 1,371 | $79.94 | $109.6K | Form 4 |
| 2026-03-11 | WEST ALFRED P JR | Other | Open-market sale | 6,076 | $79.11 | $480.7K | Form 4 |
| 2026-03-10 | WEST ALFRED P JR | Other | Open-market sale | 29,431 | $80.47 | $2.37M | Form 4 |
| 2026-03-10 | WEST ALFRED P JR | Other | Open-market sale | 25,391 | $79.97 | $2.03M | Form 4 |
| 2026-03-10 | WEST ALFRED P JR | Other | Open-market sale | 178 | $78.88 | $14.0K | Form 4 |
Ask the chat about SEIC's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: SEI Investments Company (SEIC).
Last updated 2026-09-30 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.