SEIC's three largest insider shareholders as of September 12, 2026 are Alfred P Jr West (TenPercentOwner, 9.35Mn shares), Alfred P Jr West (TenPercentOwner, 9.35Mn shares), Alfred P Jr West (TenPercentOwner, 9.35Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Alfred P Jr West | Executive Chairman | 25,232,766 | 0 | 25,232,766 | 77.4% | 29 Jun, 2026 |
| 2 | Carmen Romeo | Executive Vice President | 3,120,586 | 0 | 3,120,586 | 9.6% | 03 Sep, 2026 |
| 3 | Dennis Mcgonigle | Evp, Cfo | 2,376,652 | 0 | 2,376,652 | 7.3% | 01 Sep, 2023 |
| 4 | William Doran | Director | 618,802 | 0 | 618,802 | 1.9% | 11 Jun, 2026 |
| 5 | Kevin Barr | Executive Vice President | 329,482 | 0 | 329,482 | 1.0% | 02 Dec, 2021 |
| 6 | Ryan Hicke | Chief Executive Officer | 192,815 | 0 | 192,815 | 0.6% | 08 Sep, 2026 |
| 7 | Stephen Meyer | Executive Vice President | 186,224 | 0 | 186,224 | 0.6% | 29 Nov, 2021 |
| 8 | Wayne Withrow | Executive Vice President | 147,777 | 0 | 147,777 | 0.5% | 09 Feb, 2024 |
| 9 | Sean Denham | Executive Vp, Cfo, Coo | 102,758 | 0 | 102,758 | 0.3% | 19 Mar, 2026 |
| 10 | Kathryn Mccarthy | Director | 77,883 | 0 | 77,883 | 0.2% | 04 Aug, 2026 |
| 11 | Philip Mccabe | Evp Head Of Investment Mgmt | 54,884 | 0 | 54,884 | 0.2% | 06 Aug, 2026 |
| 12 | Michael Lane | Executive Vice President | 41,981 | 0 | 41,981 | 0.1% | 16 Dec, 2025 |
| 13 | Sanjay Sharma | Evp (*Remarks) | 39,829 | 0 | 39,829 | 0.1% | 28 Jul, 2026 |
| 14 | Paul Klauder | Executive Vice President | 20,752 | 0 | 20,752 | 0.1% | 28 Mar, 2024 |
| 15 | Michael Peterson | Executive Vice President | 20,148 | 0 | 20,148 | 0.1% | 01 Sep, 2026 |
| 16 | Carl Guarino | Director | 18,308 | 0 | 18,308 | 0.1% | 30 Jul, 2026 |
| 17 | Sneha S. Shah | Officer | 14,092 | 0 | 14,092 | 0.0% | 28 Jul, 2026 |
| 18 | Jonathan Brassington | Director | 6,207 | 0 | 6,207 | 0.0% | 16 Dec, 2025 |
| 19 | Thomas C. Naratil | Director | 4,342 | 0 | 4,342 | 0.0% | 16 Dec, 2025 |
| 20 | Karin A. Risi | Director | 4,342 | 0 | 4,342 | 0.0% | 16 Dec, 2025 |
| 21 | Stephanie D. Miller | Director | 3,941 | 0 | 3,941 | 0.0% | 16 Dec, 2024 |
| 22 | Kathy Heilig | Treasurer | 1,891 | 0 | 1,891 | 0.0% | 21 Nov, 2022 |
| 23 | Mark Andrew Warner | In Remarks | 921 | 0 | 921 | 0.0% | 30 Jul, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 03 Sep, 2026 | Ryan Hicke | Chief Executive Officer | Acquired M | 17,500 | $48.47 | $848.23K | 210,315 | Direct |
| 03 Sep, 2026 | Ryan Hicke | Chief Executive Officer | Acquired M | 20,000 | $64.43 | $1.29Mn | 230,315 | Direct |
| 03 Sep, 2026 | Ryan Hicke | Chief Executive Officer | Disposed S | 37,500 | $110.71 | $4.15Mn | 192,815 | Direct |
| 03 Sep, 2026 | Ryan Hicke | Chief Executive Officer | Disposed M | 17,500 | — | — | 0 | Direct |
| 03 Sep, 2026 | Ryan Hicke | Chief Executive Officer | Disposed M | 20,000 | — | — | 0 | Direct |
| 28 Aug, 2026 | Michael Peterson | Executive Vice President | Acquired M | 37,500 | $56.54 | $2.12Mn | 57,648 | Direct |
| 28 Aug, 2026 | Michael Peterson | Executive Vice President | Disposed S | 37,500 | $111.51 | $4.18Mn | 20,148 | Direct |
| 28 Aug, 2026 | Michael Peterson | Executive Vice President | Disposed M | 37,500 | — | — | 0 | Direct |
| 04 Aug, 2026 | Philip Mccabe | Officer | Acquired M | 9,957 | $49.63 | $494.17K | 64,841 | Direct |
| 04 Aug, 2026 | Philip Mccabe | Officer | Acquired M | 15,000 | $49.63 | $744.45K | 79,841 | Direct |
| 04 Aug, 2026 | Philip Mccabe | Officer | Disposed S | 24,957 | $105.04 | $2.62Mn | 54,884 | Direct |
| 05 Aug, 2026 | Philip Mccabe | Officer | Acquired M | 5,043 | $49.63 | $250.28K | 59,927 | Direct |
| 05 Aug, 2026 | Philip Mccabe | Officer | Disposed S | 5,043 | $105.50 | $532.04K | 54,884 | Direct |
| 04 Aug, 2026 | Philip Mccabe | Officer | Disposed M | 9,957 | — | — | 5,043 | Direct |
| 04 Aug, 2026 | Philip Mccabe | Officer | Disposed M | 15,000 | — | — | 0 | Direct |
| 05 Aug, 2026 | Philip Mccabe | Officer | Disposed M | 5,043 | — | — | 0 | Direct |
| 03 Aug, 2026 | Kathryn Mccarthy | Director | Acquired M | 5,000 | $71.12 | $355.60K | 82,883 | Direct |
| 03 Aug, 2026 | Kathryn Mccarthy | Director | Acquired M | 5,000 | $71.12 | $355.60K | 87,883 | Direct |
| 03 Aug, 2026 | Kathryn Mccarthy | Director | Disposed S | 10,000 | $103.54 | $1.04Mn | 77,883 | Direct |
| 03 Aug, 2026 | Kathryn Mccarthy | Director | Disposed M | 5,000 | — | — | 0 | Direct |