As of March 23, 2026, Sei Investments's top three insider holders are Alfred P Jr West (Other, 6.94Mn shares), Carmen Romeo (Director, 1.56Mn shares), William Doran (Director, 623.80K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Alfred P Jr West | 6,875,783 | 0 | 12 Mar, 2026 | |
| Sean Denham | Executive Vp, Cfo, Coo | 57,758 | 0 | 19 Mar, 2026 |
| Wayne Withrow | Executive Vice President | 55,399 | 0 | 09 Feb, 2024 |
| Sanjay Sharma | See Remarks* | 39,829 | 0 | 16 Dec, 2025 |
| 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.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 18 Mar, 2026 | Sean Denham | Common Stock | D | 7,673 | $78.77 | 57,758 | D | F |
| 10 Mar, 2026 | Alfred P Jr West | Common Stock | D | 178 | $78.88 | 6,938,052 | D | S |
| 10 Mar, 2026 | Alfred P Jr West | Common Stock | D | 25,391 | $79.97 | 6,912,661 | D | S |
| 10 Mar, 2026 | Alfred P Jr West | Common Stock | D | 29,431 | $80.47 | 6,883,230 | D | S |
| 11 Mar, 2026 | Alfred P Jr West | Common Stock | D | 6,076 | $79.11 | 6,877,154 | D | S |
| 11 Mar, 2026 | Alfred P Jr West | Common Stock | D | 1,371 | $79.94 | 6,875,783 | D | S |
| 25 Feb, 2026 | Mark Andrew Warner | Common Stock | A | 2,000 | $71.12 | 2,921 | D | A |
| 25 Feb, 2026 | Mark Andrew Warner | Common Stock | A | 2,000 | $71.12 | 4,921 | D | A |
| 25 Feb, 2026 | Mark Andrew Warner | Common Stock | D | 4,000 | $81.74 | 921 | D | S |
| 25 Feb, 2026 | Mark Andrew Warner | STOCK OPTION RIGHT TO PURCHASE | D | 2,000 | - | 0 | D | M |
| 25 Feb, 2026 | Mark Andrew Warner | STOCK OPTION RIGHT TO PURCHASE | D | 2,000 | - | 0 | D | M |
| 01 Jan, 2026 | Alfred P Jr West | Common Stock | D | 3,482 | $82.02 | 6,938,230 | D | F |
| 05 Dec, 2025 | Mark Andrew Warner | Common Stock | D | 379 | $81.25 | 921 | D | F |
| 05 Dec, 2025 | Alfred P Jr West | Common Stock | D | 1,100 | $81.25 | 6,941,712 | D | F |
| 12 Dec, 2025 | Sean Denham | Common Stock | A | 13,254 | - | 65,431 | D | A |
| 12 Dec, 2025 | Sanjay Sharma | Common Stock | A | 8,434 | - | 32,329 | D | A |
| 12 Dec, 2025 | Sanjay Sharma | Common Stock | A | 7,500 | - | 39,829 | D | A |
| 12 Dec, 2025 | Sean Denham | Option to Purchase Common Stock | A | 49,000 | - | 49,000 | D | A |
| 12 Dec, 2025 | Sanjay Sharma | Option to Purchase Common Stock | A | 47,000 | - | 47,000 | D | A |
| 03 Dec, 2025 | Alfred P Jr West | Common Stock | A | 30,000 | $53.34 | 6,967,582 | D | M |