In Remarks
Mark Andrew Warner is the Vice President, Controller, and Chief Accounting Officer (CAO) at SEI Investments Co (SEIC), a financial services firm specializing in asset management.[[1]](https://www.gurufocus.com/insider/228964/mark-andrew-warner)[[2]](https://ca.investing.com/news/insider-trading-news/sei-investments-officer-warner-sells-326960-in-shares-93CH-4482225)[[3]](https://www.fidelity.co.uk/factsheet-data/factsheet/US7841171033USD-sei-investment-co/profile) In this role, he oversees key accounting and financial reporting functions for the company, which is headquartered in Oaks, Pennsylvania.[[1]](https://www.gurufocus.com/insider/228964/mark-andrew-warner)[[3]](https://www.fidelity.co.uk/factsheet-data/factsheet/US7841171033USD-sei-investment-co/profile)
Warner has engaged in recent insider transactions at SEIC, including selling 5,000 shares on March 3, 2025, for approximately $401,950, and on February 25, 2026, selling 4,000 shares for $326,960 while exercising options to acquire 4,000 shares as compensation.[[1]](https://www.gurufocus.com/insider/228964/mark-andrew-warner)[[2]](https://ca.investing.com/news/insider-trading-news/sei-investments-officer-warner-sells-326960-in-shares-93CH-4482225) As of early 2025, he owned 1,300 shares valued at around $110,201.[[1]](https://www.gurufocus.com/insider/228964/mark-andrew-warner) At age 57, Warner holds a significant position among SEIC's key executives, contributing to the company's operations with over 5,000 employees.[[3]](https://www.fidelity.co.uk/factsheet-data/factsheet/US7841171033USD-sei-investment-co/profile)[[5]](https://www.morningstar.com/stocks/xmex/seic/executive)
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