Sei Investments Co (SEIC) Insider Ownership

Historic Insider Ownership Trends

SEIC's three largest insider shareholders as of May 14, 2026 are Alfred P Jr West (TenPercentOwner, 9.35Mn shares), Alfred P Jr West (TenPercentOwner, 9.35Mn shares), Alfred P Jr West (TenPercentOwner, 9.06Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Alfred P Jr West - 9,352,523 0 08 Dec, 2021
Alfred P Jr West - 9,352,523 0 08 Dec, 2021
Alfred P Jr West - 9,061,792 0 16 Sep, 2022
Alfred P Jr West - 9,061,792 0 16 Sep, 2022
Alfred P Jr West Executive Chairman 6,875,783 0 12 Mar, 2026
Alfred P Jr West Executive Chairman 6,875,783 0 12 Mar, 2026
Carmen Romeo Executive Vice President 1,579,827 0 16 Dec, 2024
Carmen Romeo - 1,560,293 0 30 Dec, 2025
William Doran - 623,802 0 23 Dec, 2025
Dennis Mcgonigle Executive President 611,663 0 01 Aug, 2022
Dennis Mcgonigle Executive Vice President 594,163 0 04 Nov, 2021
Dennis Mcgonigle Evp, Cfo 594,163 0 01 Sep, 2023
Dennis Mcgonigle Executive President 576,663 0 01 Aug, 2022
Ryan Hicke Chief Executive Officer 192,815 0 01 Apr, 2026
Stephen Meyer Executive Vice President 186,224 0 29 Nov, 2021
Kevin Barr Executive Vice President 184,741 0 02 Dec, 2021
Kevin Barr Executive Vice President 144,741 0 02 Dec, 2021
Kathryn Mccarthy - 77,907 0 16 Dec, 2025
Sean Denham Executive Vp, Cfo, Coo 57,758 0 19 Mar, 2026
Wayne Withrow Executive Vice President 55,399 0 09 Feb, 2024
Wayne Withrow Executive Vice President 55,399 0 09 Feb, 2024
Philip Mccabe Evp Head Of Investment Mgmt 54,884 0 24 Apr, 2026
Wayne Withrow Executive Vice President 53,579 0 01 Nov, 2022
Wayne Withrow Executive Vice President 53,579 0 01 Nov, 2022
Sean Denham Executive Vice President 45,000 0 18 Mar, 2024
Michael Lane Executive Vice President 41,981 0 16 Dec, 2025
Sanjay Sharma Evp (*Remarks) 39,829 0 23 Apr, 2026
Sanjay Sharma Evp (*Remarks) 39,829 0 16 Dec, 2025
Wayne Withrow Executive Vice President 38,799 0 01 Nov, 2022
Wayne Withrow Executive Vice President 38,799 0 01 Nov, 2022
Paul Klauder Executive Vice President 20,752 0 28 Mar, 2024
Michael Peterson Executive Vice President 20,148 0 23 Apr, 2026
Carl Guarino - 18,308 0 16 Dec, 2025
Jonathan Brassington - 6,207 0 16 Dec, 2025
Thomas C. Naratil - 4,342 0 16 Dec, 2025
Karin A. Risi - 4,342 0 16 Dec, 2025
Stephanie D. Miller - 3,941 0 16 Dec, 2024
Kathy Heilig Treasurer 1,891 0 21 Nov, 2022
Mark Andrew Warner - 921 0 26 Feb, 2026
Mark Andrew Warner - 921 0 26 Feb, 2026

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
23 Apr, 2026 Philip Mccabe Common Stock D 15,000 $91.82 54,884 D S
23 Apr, 2026 Philip Mccabe Common Stock D 15,000 $91.82 54,884 D S
23 Apr, 2026 Philip Mccabe Common Stock D 15,000 $91.82 54,884 D S
23 Apr, 2026 Philip Mccabe Common Stock D 15,000 $91.82 54,884 D S
23 Apr, 2026 Philip Mccabe Common Stock D 15,000 $91.82 54,884 D S
23 Apr, 2026 Sanjay Sharma Common Stock A 12,500 $49.63 52,329 D M
23 Apr, 2026 Michael Peterson Common Stock A 10,000 $48.47 30,148 D M
23 Apr, 2026 Michael Peterson Common Stock A 10,000 $48.47 30,148 D M
23 Apr, 2026 Sanjay Sharma Common Stock A 12,500 $49.63 52,329 D M
23 Apr, 2026 Sanjay Sharma Common Stock A 12,500 $49.63 52,329 D M
23 Apr, 2026 Michael Peterson Common Stock A 10,000 $48.47 30,148 D M
23 Apr, 2026 Sanjay Sharma Common Stock A 12,500 $49.63 52,329 D M
23 Apr, 2026 Michael Peterson Common Stock A 10,000 $48.47 30,148 D M
23 Apr, 2026 Michael Peterson Common Stock A 10,000 $48.47 30,148 D M
23 Apr, 2026 Sanjay Sharma Common Stock A 12,500 $49.63 52,329 D M
23 Apr, 2026 Michael Peterson Common Stock D 10,000 $90.00 20,148 D S
23 Apr, 2026 Michael Peterson Common Stock D 10,000 $90.00 20,148 D S
23 Apr, 2026 Sanjay Sharma Common Stock A 12,500 $49.63 64,829 D M
23 Apr, 2026 Michael Peterson Common Stock D 10,000 $90.00 20,148 D S
23 Apr, 2026 Sanjay Sharma Common Stock A 12,500 $49.63 64,829 D M