SEIC

Sei Investments Co

Company with tickers: SEIC

CIK

350894

CUSIP

784117103

Shares Outstanding

120,272,976

Website

https://seic.com

Investor Relations

https://ir.seic.com/

13F Activity (30d)

53 filings 8 filers

Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 3, 4 and 5. Form 4 must be filed within two business days of the trade.

Insider Sentiment Score

Peer-relative 0–100 rank of how aggressively insiders accumulated over the trailing 90 days. See the full ranking.

Net buyers

-6

Net shares bought

-0.06%

Net buy value

-$6,258,153

Date	Insider	Role	Type	Shares	Price	Value	After
2026-06-09	DORAN WILLIAM	Director	Sell	5,000	$90.50	$452,500	618,802
2026-05-04	MCCARTHY KATHRYN	Director	Convert	5,000	$49.63	$248,150	82,883
2026-05-04	MCCARTHY KATHRYN	Director	Sell	10,000	$91.07	$910,700	77,883
2026-05-04	MCCARTHY KATHRYN	Director	Convert	5,000	—	—	0
2026-05-04	MCCARTHY KATHRYN	Director	Convert	5,000	—	—	0
2026-05-04	MCCARTHY KATHRYN	Director	Convert	5,000	$49.63	$248,150	87,883
2026-04-28	Warner Mark Andrew	Insider	Convert	4,000	$48.47	$193,880	4,921
2026-04-28	Warner Mark Andrew	Insider	Convert	2,000	—	—	0
2026-04-28	Warner Mark Andrew	Insider	Sell	4,000	$91.16	$364,640	921
2026-04-28	Warner Mark Andrew	Insider	Convert	2,000	—	—	0
2026-04-23	Sharma Sanjay	See Remarks*	Convert	12,500	—	—	0
2026-04-23	Sharma Sanjay	See Remarks*	Sell	23,441	$90.08	$2,111,565	41,387
2026-04-23	McCabe Philip	See Remarks	Sell	15,000	$91.82	$1,377,300	54,884
2026-04-23	Peterson Michael	EXECUTIVE VICE PRESIDENT	Convert	10,000	$48.47	$484,700	30,148
2026-04-23	Sharma Sanjay	See Remarks*	Convert	12,500	—	—	0
2026-04-23	Peterson Michael	EXECUTIVE VICE PRESIDENT	Sell	10,000	$90.00	$900,000	20,148
2026-04-23	Sharma Sanjay	See Remarks*	Convert	12,500	$49.63	$620,375	64,828
2026-04-23	Sharma Sanjay	See Remarks*	Sell	1,559	$90.73	$141,448	39,828
2026-04-23	Sharma Sanjay	See Remarks*	Convert	12,500	$49.63	$620,375	52,328
2026-04-23	Peterson Michael	EXECUTIVE VICE PRESIDENT	Convert	10,000	—	—	0
2026-03-31	Hicke Ryan	Director, CHIEF EXECUTIVE OFFICER	Tax	4,349	$77.21	$335,786	192,814
2026-03-18	Denham Sean	Executive VP, CFO, COO	Tax	7,673	$78.77	$604,402	57,758
2026-03-11	WEST ALFRED P JR	Insider	Sell	1,371	$79.94	$109,598	6,875,783
2026-03-11	WEST ALFRED P JR	Insider	Sell	6,076	$79.11	$480,672	6,877,154
2026-03-10	WEST ALFRED P JR	Insider	Sell	25,391	$79.97	$2,030,518	6,912,661
2026-03-10	WEST ALFRED P JR	Insider	Sell	178	$78.88	$14,041	6,938,052
2026-03-10	WEST ALFRED P JR	Insider	Sell	29,431	$80.47	$2,368,313	6,883,230
2026-02-25	Warner Mark Andrew	Insider	Convert	2,000	—	—	0
2026-02-25	Warner Mark Andrew	Insider	Convert	2,000	—	—	0
2026-02-25	Warner Mark Andrew	Insider	Sell	4,000	$81.74	$326,960	921
2026-02-25	Warner Mark Andrew	Insider	Award	2,000	$71.12	$142,240	2,921
2026-02-25	Warner Mark Andrew	Insider	Award	2,000	$71.12	$142,240	4,921
2026-01-29	Hicke Ryan	Director, CHIEF EXECUTIVE OFFICER	Convert	17,500	—	—	57,500
2026-01-29	Hicke Ryan	Director, CHIEF EXECUTIVE OFFICER	Convert	17,500	$56.54	$989,450	277,163
2026-01-29	Hicke Ryan	Director, CHIEF EXECUTIVE OFFICER	Sell	17,009	$86.75	$1,475,531	260,154
2026-01-29	Hicke Ryan	Director, CHIEF EXECUTIVE OFFICER	Convert	12,500	$71.12	$889,000	222,163
2026-01-29	Hicke Ryan	Director, CHIEF EXECUTIVE OFFICER	Sell	13,054	$88.06	$1,149,535	197,163
2026-01-29	Hicke Ryan	Director, CHIEF EXECUTIVE OFFICER	Convert	20,000	—	—	0
2026-01-29	Hicke Ryan	Director, CHIEF EXECUTIVE OFFICER	Convert	12,500	—	—	0
2026-01-29	Hicke Ryan	Director, CHIEF EXECUTIVE OFFICER	Convert	17,500	$48.47	$848,225	239,663
2026-01-29	Hicke Ryan	Director, CHIEF EXECUTIVE OFFICER	Convert	20,000	$64.43	$1,288,600	259,663
2026-01-29	Hicke Ryan	Director, CHIEF EXECUTIVE OFFICER	Convert	12,500	$71.12	$889,000	209,663
2026-01-29	Hicke Ryan	Director, CHIEF EXECUTIVE OFFICER	Sell	49,937	$87.39	$4,363,994	210,217
2026-01-29	Hicke Ryan	Director, CHIEF EXECUTIVE OFFICER	Convert	17,500	—	—	0
2026-01-29	Hicke Ryan	Director, CHIEF EXECUTIVE OFFICER	Convert	12,500	—	—	0
2026-01-01	WEST ALFRED P JR	Insider	Tax	3,482	$82.02	$285,594	6,938,230
2025-12-30	ROMEO CARMEN	Director	Gift	15,500	—	—	1,560,293
2025-12-22	DORAN WILLIAM	Director	Sell	7,000	$83.85	$586,950	623,802
2025-12-12	Risi Karin A.	Director	Award	2,266	—	—	4,342
2025-12-12	Naratil Thomas C.	Director	Award	2,266	—	—	4,342

Showing 1–50 of 606 transactions