SEC Form 4 · Updated Daily
SEIC
— SEI INVESTMENTS COMPANY OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| WEST ALFRED P JR | Reporting Owner | 6,790,057 | 2026-09-29 | S |
| SMITH THOMAS W | Director | 4,157,886 | 2008-06-24 | D |
| ROMEO CARMEN | Director | 1,565,293 | 2026-09-01 | M |
| MCGONIGLE DENNIS | Officer | 624,163 | 2023-08-30 | M |
| DORAN WILLIAM | Director | 618,802 | 2026-06-09 | S |
| PORTER HENRY | Director | 328,775 | 2009-11-24 | M |
| Hicke Ryan | Officer | 230,314.77 | 2026-09-03 | M |
| Barr Kevin | Officer | 204,741 | 2022-12-09 | M |
| CRUDUP ROBERT | Officer | 190,000 | 2018-03-05 | M |
| Meyer Stephen | Officer | 186,224 | 2021-11-26 | M |
| LIEB RICHARD | Director | 139,628 | 2015-12-23 | M |
| LOUGHLIN EDWARD | Officer | 136,000 | 2015-04-29 | M |
| MCCARTHY KATHRYN | Director | 87,883 | 2026-08-03 | M |
| Dasher Karl | Officer | 87,140 | 2008-04-02 | M |
| McCabe Philip | Officer | 79,841.45 | 2026-08-04 | M |
| WITHROW WAYNE | Officer | 70,399 | 2024-02-07 | M |
| Sharma Sanjay | Officer | 59,828.992 | 2026-07-24 | M |
| Denham Sean | Officer | 57,758 | 2026-03-18 | F |
| Peterson Michael | Officer | 57,648 | 2026-08-28 | M |
| KLAUDER N JEFFREY | Officer | 45,831 | 2018-03-13 | P |
| LANE MICHAEL | Officer | 39,581 | 2026-09-22 | S |
| Ross Howard D | Director | 32,000 | 2008-08-15 | M |
| GUARINO CARL | Director | 28,308 | 2026-07-28 | M |
| Ujobai Joseph P | Officer | 27,540 | 2018-09-12 | M |
| KLAUDER PAUL | Officer | 22,752 | 2024-03-08 | M |
| CIPRIANO JAMES | Officer | 17,297 | 2024-02-29 | — |
| BLUMENSTEIN SARAH | Director | 16,993 | 2023-02-21 | M |
| Warner Mark Andrew | Reporting Owner | 15,921 | 2026-07-28 | M |
| HEILIG KATHY | Officer | 14,291 | 2022-11-18 | M |
| Shah Sneha S. | Officer | 14,092 | 2026-07-24 | F |
| Brassington Jonathan | Director | 6,207 | 2025-12-12 | A |
| Naratil Thomas C. | Director | 4,342 | 2025-12-12 | A |
| Risi Karin A. | Director | 4,342 | 2025-12-12 | A |
| MILLER STEPHANIE D. | Director | 3,941 | 2024-12-12 | A |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-30 | WEST ALFRED P JR | Open-market sale | 5,483 | $103.16 | 6,784,574 |
| 2026-09-29 | WEST ALFRED P JR | Open-market sale | 28,394 | $103.40 | 6,790,057 |
| 2026-09-22 | LANE MICHAEL | Open-market sale | 2,400 | $102.78 | 39,581 |
| 2026-09-03 | Hicke Ryan | Option exercise (derivative) | 17,500 | — | 0 |
| 2026-09-03 | Hicke Ryan | Open-market sale | 37,500 | $110.71 | 192,814.77 |
| 2026-09-03 | Hicke Ryan | Option exercise | 20,000 | $64.43 | 230,314.77 |
| 2026-09-03 | Hicke Ryan | Option exercise | 17,500 | $48.47 | 210,314.77 |
| 2026-09-01 | ROMEO CARMEN | Option exercise (derivative) | 5,000 | — | 0 |
| 2026-09-01 | ROMEO CARMEN | Open-market sale | 5,000 | $109.70 | 1,560,293 |
| 2026-09-01 | ROMEO CARMEN | Option exercise | 5,000 | $49.63 | 1,565,293 |
| 2026-08-28 | Peterson Michael | Option exercise (derivative) | 37,500 | — | 0 |
| 2026-08-28 | Peterson Michael | Open-market sale | 37,500 | $111.51 | 20,148 |
| 2026-08-28 | Peterson Michael | Option exercise | 37,500 | $56.54 | 57,648 |
| 2026-08-05 | McCabe Philip | Option exercise (derivative) | 5,043 | — | 0 |
| 2026-08-05 | McCabe Philip | Open-market sale | 5,043 | $105.50 | 54,884.45 |
| 2026-08-05 | McCabe Philip | Option exercise | 5,043 | $49.63 | 59,927.45 |
| 2026-08-04 | McCabe Philip | Option exercise (derivative) | 15,000 | — | 0 |
| 2026-08-04 | McCabe Philip | Option exercise (derivative) | 9,957 | — | 5,043 |
| 2026-08-04 | McCabe Philip | Open-market sale | 24,957 | $105.04 | 54,884.45 |
| 2026-08-04 | McCabe Philip | Option exercise | 15,000 | $49.63 | 79,841.45 |
| 2026-08-04 | McCabe Philip | Option exercise | 9,957 | $49.63 | 64,841.45 |
| 2026-08-03 | MCCARTHY KATHRYN | Option exercise (derivative) | 5,000 | — | 0 |
| 2026-08-03 | MCCARTHY KATHRYN | Open-market sale | 10,000 | $103.53 | 77,883 |
| 2026-08-03 | MCCARTHY KATHRYN | Option exercise | 5,000 | $71.12 | 87,883 |
| 2026-08-03 | MCCARTHY KATHRYN | Option exercise | 5,000 | $71.12 | 82,883 |
| 2026-07-28 | GUARINO CARL | Option exercise (derivative) | 5,000 | — | 0 |
| 2026-07-28 | GUARINO CARL | Open-market sale | 10,000 | $103.19 | 18,308 |
| 2026-07-28 | GUARINO CARL | Option exercise | 5,000 | $49.63 | 28,308 |
| 2026-07-28 | GUARINO CARL | Option exercise | 5,000 | $49.63 | 23,308 |
| 2026-07-28 | Peterson Michael | Option exercise (derivative) | 25,000 | — | 0 |
| 2026-07-28 | Peterson Michael | Open-market sale | 25,000 | $102.05 | 20,148 |
| 2026-07-28 | Peterson Michael | Option exercise | 25,000 | $55.73 | 45,148 |
| 2026-07-28 | Warner Mark Andrew | Option exercise (derivative) | 2,500 | — | 0 |
| 2026-07-28 | Warner Mark Andrew | Open-market sale | 7,400 | $102.97 | 921 |
| 2026-07-28 | Warner Mark Andrew | Open-market sale | 5,300 | $102.01 | 8,321 |
| 2026-07-28 | Warner Mark Andrew | Open-market sale | 2,300 | $101.11 | 13,621 |
| 2026-07-28 | Warner Mark Andrew | Option exercise | 5,000 | $56.54 | 15,921 |
| 2026-07-28 | Warner Mark Andrew | Option exercise | 5,000 | $56.54 | 10,921 |
| 2026-07-28 | Warner Mark Andrew | Option exercise | 2,500 | $64.43 | 5,921 |
| 2026-07-28 | Warner Mark Andrew | Option exercise | 2,500 | $64.43 | 3,421 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.