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United States Investment Banking & Investment Services

SEI Investments Co (SEIC)

Track

Over the last 90 days, SEI Investments Co. has seen significant insider selling, with a net value of -$5.8 million. Executives contributed -$4.9 million to this net sell-off. Notably, there were 12 transactions, all of which were sales, indicating a bearish sentiment among insiders.
Stock chart
Ticker: SEIC Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
DORAN WILLIAM
1 sale — total 100,000 USD
Sale 9 Jun 2026
Value US$887,191.46 | Price 231.01 | Shares 31,660
Proposed sale 9 Jun 2026
Value US$139,900.19 | Price 417.51 | Shares 51,917
Sale 4 May 2026
Value US$910,700.00 | Price 91.07 | Shares 10,000
Proposed sale 4 May 2026
Value US$910,747.00 | Price 91.07 | Shares 10,000
Sale 28 Apr 2026
Value US$364,640.00 | Price 91.16 | Shares 4,000
Proposed sale 28 Apr 2026
Value US$364,640.00 | Price 91.16 | Shares 4,000
Sale 23 Apr 2026
Value US$1,377,300.00 | Price 91.82 | Shares 15,000
Sale 23 Apr 2026
Value US$141,448.07 | Price 90.73 | Shares 1,559
Sale 23 Apr 2026
Value US$2,111,565.28 | Price 90.08 | Shares 23,441
Proposed sale 23 Apr 2026
Value US$2,252,914.00 | Price 90.12 | Shares 25,000
Sale 23 Apr 2026
Value US$900,000.00 | Price 90.00 | Shares 10,000
Proposed sale 23 Apr 2026
Value US$900,000.00 | Price 90.00 | Shares 10,000
Proposed sale 23 Apr 2026
Value US$1,834,646.00 | Price 91.73 | Shares 20,000
Sale 11 Mar 2026
Value US$109,597.74 | Price 79.94 | Shares 1,371
Sale 11 Mar 2026
Value US$480,672.36 | Price 79.11 | Shares 6,076
Sale 10 Mar 2026
Value US$2,368,312.57 | Price 80.47 | Shares 29,431
Sale 10 Mar 2026
Value US$2,030,518.27 | Price 79.97 | Shares 25,391
Sale 10 Mar 2026
Value US$14,040.64 | Price 78.88 | Shares 178
Proposed sale 10 Mar 2026
Value US$5,437,720.00 | Price 81.16 | Shares 67,000
Sale 25 Feb 2026
Value US$326,960.00 | Price 81.74 | Shares 4,000
Proposed sale 25 Feb 2026
Value US$326,964.00 | Price 81.74 | Shares 4,000
Sale 29 Jan 2026
Value US$1,149,535.24 | Price 88.06 | Shares 13,054
Sale 29 Jan 2026
Value US$4,363,994.43 | Price 87.39 | Shares 49,937
Sale 29 Jan 2026
Value US$1,475,530.75 | Price 86.75 | Shares 17,009
Proposed sale 29 Jan 2026
Value US$6,988,815.00 | Price 87.36 | Shares 80,000
Sale 22 Dec 2025
Value US$586,950.00 | Price 83.85 | Shares 7,000
Proposed sale 22 Dec 2025
Value US$586,950.00 | Price 83.85 | Shares 7,000
Sale 4 Dec 2025
Value US$973,320.00 | Price 81.11 | Shares 12,000
Proposed sale 4 Dec 2025
Value US$973,372.00 | Price 81.11 | Shares 12,000
Sale 3 Dec 2025
Value US$2,003,149.90 | Price 80.87 | Shares 24,770
Proposed sale 3 Dec 2025
Value US$2,003,217.00 | Price 80.87 | Shares 24,770
Sale 12 Nov 2025
Value US$2,105,250.00 | Price 84.21 | Shares 25,000
Proposed sale 12 Nov 2025
Value US$2,105,362.00 | Price 84.21 | Shares 25,000
Proposed sale 11 Nov 2025
Value US$420,026.00 | Price 84.01 | Shares 5,000
Sale 11 Nov 2025
Value US$420,050.00 | Price 84.01 | Shares 5,000
Proposed sale 29 Sep 2025
Value US$856,555.00 | Price 85.66 | Shares 10,000
Sale 29 Sep 2025
Value US$856,600.00 | Price 85.66 | Shares 10,000
Sale 23 Sep 2025
Value US$864,100.00 | Price 86.41 | Shares 10,000
Proposed sale 23 Sep 2025
Value US$864,120.00 | Price 86.41 | Shares 10,000
Proposed sale 22 Sep 2025
Value US$647,473.00 | Price 86.33 | Shares 7,500
Sale 19 Aug 2025
Value US$3,090,500.00 | Price 88.30 | Shares 35,000
Proposed sale 19 Aug 2025
Value US$3,090,362.00 | Price 88.30 | Shares 35,000
Sale 7 Aug 2025
Value US$627,730.95 | Price 88.55 | Shares 7,089
Sale 5 Aug 2025
Value US$60,663.96 | Price 88.69 | Shares 684
Sale 31 Jul 2025
Value US$418,386.77 | Price 88.51 | Shares 4,727
Proposed sale 31 Jul 2025
Value US$1,106,317.00 | Price 88.51 | Shares 12,500
Sale 29 Jul 2025
Value US$443,750.00 | Price 88.75 | Shares 5,000
Proposed sale 29 Jul 2025
Value US$443,759.00 | Price 88.75 | Shares 5,000
Sale 29 May 2025
Value US$138,721.88 | Price 85.21 | Shares 1,628
Sale 29 May 2025
Value US$5,434,601.48 | Price 84.26 | Shares 64,498
Sale 28 May 2025
Value US$6,433,500.00 | Price 85.78 | Shares 75,000
Proposed sale 28 May 2025
Value US$12,981,470.00 | Price 85.97 | Shares 151,000
Sale 15 May 2025
Value US$4,213,500.00 | Price 84.27 | Shares 50,000
Proposed sale 15 May 2025
Value US$4,213,390.00 | Price 84.27 | Shares 50,000
Sale 14 May 2025
Value US$1,750,560.00 | Price 83.36 | Shares 21,000
Proposed sale 14 May 2025
Value US$1,750,642.00 | Price 83.36 | Shares 21,000
Sale 14 May 2025
Value US$1,668,000.00 | Price 83.40 | Shares 20,000
Proposed sale 14 May 2025
Value US$1,668,033.00 | Price 83.40 | Shares 20,000
Sale 5 Mar 2025
Value US$104,656.16 | Price 76.28 | Shares 1,372
Sale 4 Mar 2025
Value US$1,069,606.00 | Price 77.20 | Shares 13,855
Sale 4 Mar 2025
Value US$3,649,949.82 | Price 76.49 | Shares 47,718
Sale 4 Mar 2025
Value US$1,396,213.79 | Price 75.77 | Shares 18,427
Sale 3 Mar 2025
Value US$1,735,764.80 | Price 80.30 | Shares 21,616
Sale 3 Mar 2025
Value US$1,543,667.75 | Price 79.55 | Shares 19,405
Sale 3 Mar 2025
Value US$2,508,131.22 | Price 78.82 | Shares 31,821
Sale 3 Mar 2025
Value US$401,950.00 | Price 80.39 | Shares 5,000
Proposed sale 3 Mar 2025
Value US$401,959.00 | Price 80.39 | Shares 5,000
Proposed sale 3 Mar 2025
Value US$12,835,200.00 | Price 80.22 | Shares 160,000
Sale 16 Dec 2024
Value US$321,804.42 | Price 86.09 | Shares 3,738
Sale 16 Dec 2024
Value US$2,958,908.48 | Price 85.34 | Shares 34,672
Sale 16 Dec 2024
Value US$1,154,903.04 | Price 84.72 | Shares 13,632
Sale 13 Dec 2024
Value US$43,625.00 | Price 87.25 | Shares 500
Sale 13 Dec 2024
Value US$1,095,252.66 | Price 86.22 | Shares 12,703
Sale 13 Dec 2024
Value US$6,932,986.20 | Price 85.64 | Shares 80,955
Proposed sale 13 Dec 2024
Value US$12,987,000.00 | Price 86.58 | Shares 150,000
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-11 2026-06-09 S Sale
3.0
DORAN WILLIAM
Non-Executive Director
31,660 +48.9%
231.01
US$887,191 		31,660 +48.9% 231.01 US$887,191
2026-06-09 2026-06-09 PrS Proposed sale
3.0
William M Doran

Director

Non-Executive Director
51,917
417.51
US$139,900 		51,917 417.51 US$139,900
2026-05-05 2026-05-04 S Sale
3.1
MCCARTHY KATHRYN
Non-Executive Director
50,423 +38.4%
189.32
US$4,608,580 		50,423 +38.4% 189.32 US$4,608,580
2026-05-04 2026-05-04 PrS Proposed sale
3.1
MCCARTHY KATHRYN

Director

Non-Executive Director
10,000
91.07
US$910,747 		10,000 91.07 US$910,747
2026-04-30 2026-04-28 S Sale
2.8
Warner Mark Andrew

In Remarks

Officer
4,000 -81.3%
91.16
US$364,640 		4,000 -81.3% 91.16 US$364,640
2026-04-28 2026-04-28 PrS Proposed sale
2.8
Warner Mark Andrew

Officer

Officer
4,000
91.16
US$364,640 		4,000 91.16 US$364,640
2026-04-24 2026-04-23 S Sale
2.0
McCabe Philip

See Remarks

Officer
15,000 -21.5%
91.82
US$1,377,300 		15,000 -21.5% 91.82 US$1,377,300
2026-04-23 2026-04-23 S Sale
2.4
Sharma Sanjay

See Remarks*

Officer
1,559 -3.8%
90.73
US$141,448 		1,559 -3.8% 90.73 US$141,448
2026-04-23 2026-04-23 S Sale
2.4
Sharma Sanjay

See Remarks*

Officer
23,441 -36.2%
90.08
US$2,111,565 		23,441 -36.2% 90.08 US$2,111,565
2026-04-23 2026-04-23 S Sale
2.8
Peterson Michael

EXECUTIVE VICE PRESIDENT

Officer
10,000 -33.2%
90.00
US$900,000 		10,000 -33.2% 90.00 US$900,000
2026-04-23 2026-04-23 PrS Proposed sale
2.0
PHILIP MC CABE

Officer

Officer
20,000
91.73
US$1,834,646 		20,000 91.73 US$1,834,646
2026-04-23 2026-04-23 PrS Proposed sale
2.4
Sharma Sanjay

Officer

Officer
25,000
90.12
US$2,252,914 		25,000 90.12 US$2,252,914
2026-04-23 2026-04-23 PrS Proposed sale
2.8
Peterson Michael

Officer

Officer
10,000
90.00
US$900,000 		10,000 90.00 US$900,000
2026-03-12 2026-03-11 S Sale
3.2
WEST ALFRED P JR

Chairman Emeritus
1,371 -0.0%
79.94
US$109,598 		1,371 -0.0% 79.94 US$109,598
2026-03-12 2026-03-11 S Sale
3.2
WEST ALFRED P JR

Chairman Emeritus
6,076 -0.1%
79.11
US$480,672 		6,076 -0.1% 79.11 US$480,672
2026-03-12 2026-03-10 S Sale
3.2
WEST ALFRED P JR

Chairman Emeritus
29,431 -0.4%
80.47
US$2,368,313 		29,431 -0.4% 80.47 US$2,368,313
2026-03-12 2026-03-10 S Sale
3.2
WEST ALFRED P JR

Chairman Emeritus
25,391 -0.4%
79.97
US$2,030,518 		25,391 -0.4% 79.97 US$2,030,518
2026-03-12 2026-03-10 S Sale
3.2
WEST ALFRED P JR

Chairman Emeritus
178 -0.0%
78.88
US$14,041 		178 -0.0% 78.88 US$14,041
2026-03-10 2026-03-10 PrS Proposed sale
3.2
Alfred Paul West Jr

Affiliate
67,000
81.16
US$5,437,720 		67,000 81.16 US$5,437,720
2026-02-26 2026-02-25 S Sale
2.8
Warner Mark Andrew

See Remarks
4,000 -81.3%
81.74
US$326,960 		4,000 -81.3% 81.74 US$326,960
2026-02-25 2026-02-25 PrS Proposed sale
2.8
Warner Mark Andrew

Officer

Officer
4,000
81.74
US$326,964 		4,000 81.74 US$326,964
2026-02-02 2026-01-29 S Sale
2.9
Hicke Ryan

CHIEF EXECUTIVE OFFICER

Executive Director
13,054 -6.2%
88.06
US$1,149,535 		13,054 -6.2% 88.06 US$1,149,535
2026-02-02 2026-01-29 S Sale
2.9
Hicke Ryan

CHIEF EXECUTIVE OFFICER

Executive Director
49,937 -19.2%
87.39
US$4,363,994 		49,937 -19.2% 87.39 US$4,363,994
2026-02-02 2026-01-29 S Sale
2.9
Hicke Ryan

CHIEF EXECUTIVE OFFICER

Executive Director
17,009 -6.1%
86.75
US$1,475,531 		17,009 -6.1% 86.75 US$1,475,531
2026-01-29 2026-01-29 PrS Proposed sale
2.9
Hicke Ryan

Officer; Director

Executive Director
80,000
87.36
US$6,988,815 		80,000 87.36 US$6,988,815
2025-12-23 2025-12-22 S Sale
3.0
DORAN WILLIAM
Non-Executive Director
7,000 -1.1%
83.85
US$586,950 		7,000 -1.1% 83.85 US$586,950
2025-12-22 2025-12-22 PrS Proposed sale
3.0
DORAN WILLIAM

Director

Non-Executive Director
7,000
83.85
US$586,950 		7,000 83.85 US$586,950
2025-12-08 2025-12-04 S Sale
2.0
McCabe Philip

See Remarks

Officer
12,000 -16.1%
81.11
US$973,320 		12,000 -16.1% 81.11 US$973,320
2025-12-04 2025-12-04 PrS Proposed sale
2.0
McCabe Philip

Officer

Officer
12,000
81.11
US$973,372 		12,000 81.11 US$973,372
2025-12-05 2025-12-03 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
24,770 -0.4%
80.87
US$2,003,150 		24,770 -0.4% 80.87 US$2,003,150
2025-12-03 2025-12-03 PrS Proposed sale
3.2
WEST ALFRED P JR

Officer; Director

Executive Director
24,770
80.87
US$2,003,217 		24,770 80.87 US$2,003,217
2025-11-13 2025-11-12 S Sale
2.8
Peterson Michael

EXECUTIVE VICE PRESIDENT

Officer
25,000 -64.9%
84.21
US$2,105,250 		25,000 -64.9% 84.21 US$2,105,250
2025-11-12 2025-11-12 PrS Proposed sale
2.8
Peterson Michael

Officer

Officer
25,000
84.21
US$2,105,362 		25,000 84.21 US$2,105,362
2025-11-12 2025-11-11 PrS Proposed sale
2.1
ROMEO CARMEN

Director

Non-Executive Director
5,000
84.01
US$420,026 		5,000 84.01 US$420,026
2025-11-12 2025-11-11 S Sale
2.1
ROMEO CARMEN
Non-Executive Director
5,000 -0.3%
84.01
US$420,050 		5,000 -0.3% 84.01 US$420,050
2025-09-29 2025-09-29 PrS Proposed sale
3.1
MCCARTHY KATHRYN

Director

Non-Executive Director
10,000
85.66
US$856,555 		10,000 85.66 US$856,555
2025-09-29 2025-09-29 S Sale
3.1
MCCARTHY KATHRYN
Non-Executive Director
10,000 -11.7%
85.66
US$856,600 		10,000 -11.7% 85.66 US$856,600
2025-09-24 2025-09-23 S Sale
2.1
GUARINO CARL
Non-Executive Director
10,000 -38.4%
86.41
US$864,100 		10,000 -38.4% 86.41 US$864,100
2025-09-23 2025-09-23 PrS Proposed sale
2.1
GUARINO CARL

Director

Non-Executive Director
10,000
86.41
US$864,120 		10,000 86.41 US$864,120
2025-09-22 2025-09-22 PrS Proposed sale
MILLER STEPHANIE D.

Former Director

Non-Executive Director
7,500
86.33
US$647,473 		7,500 86.33 US$647,473
2025-08-20 2025-08-19 S Sale
2.9
Hicke Ryan

CHIEF EXECUTIVE OFFICER

Executive Director
35,000 -17.0%
88.30
US$3,090,500 		35,000 -17.0% 88.30 US$3,090,500
2025-08-19 2025-08-19 PrS Proposed sale
2.9
Hicke Ryan

Officer

Officer
35,000
88.30
US$3,090,362 		35,000 88.30 US$3,090,362
2025-08-08 2025-08-07 S Sale
2.8
Peterson Michael

EXECUTIVE VICE PRESIDENT

Officer
7,089 -34.4%
88.55
US$627,731 		7,089 -34.4% 88.55 US$627,731
2025-08-06 2025-08-05 S Sale
2.8
Peterson Michael

EXECUTIVE VICE PRESIDENT

Officer
684 -4.8%
88.69
US$60,664 		684 -4.8% 88.69 US$60,664
2025-08-04 2025-07-31 S Sale
2.8
Peterson Michael

EXECUTIVE VICE PRESIDENT

Officer
4,727 -25.9%
88.51
US$418,387 		4,727 -25.9% 88.51 US$418,387
2025-07-31 2025-07-31 PrS Proposed sale
2.8
Peterson Michael

Officer

Officer
12,500
88.51
US$1,106,317 		12,500 88.51 US$1,106,317
2025-07-30 2025-07-29 S Sale
2.8
Warner Mark Andrew

See Remarks
5,000 -79.4%
88.75
US$443,750 		5,000 -79.4% 88.75 US$443,750
2025-07-29 2025-07-29 PrS Proposed sale
2.8
Warner Mark Andrew

Officer

Officer
5,000
88.75
US$443,759 		5,000 88.75 US$443,759
2025-05-30 2025-05-29 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
1,628 -0.0%
85.21
US$138,722 		1,628 -0.0% 85.21 US$138,722
2025-05-30 2025-05-29 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
64,498 -0.9%
84.26
US$5,434,601 		64,498 -0.9% 84.26 US$5,434,601
2025-05-30 2025-05-28 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
75,000 -1.1%
85.78
US$6,433,500 		75,000 -1.1% 85.78 US$6,433,500
2025-05-28 2025-05-28 PrS Proposed sale
3.2
Alfred P. West, Jr.

Executive Chairman
151,000
85.97
US$12,981,470 		151,000 85.97 US$12,981,470
2025-05-16 2025-05-15 S Sale
2.8
Peterson Michael

EXECUTIVE VICE PRESIDENT

Officer
50,000 -78.7%
84.27
US$4,213,500 		50,000 -78.7% 84.27 US$4,213,500
2025-05-15 2025-05-15 PrS Proposed sale
2.8
Peterson Michael

Officer

Officer
50,000
84.27
US$4,213,390 		50,000 84.27 US$4,213,390
2025-05-16 2025-05-14 S Sale
2.9
Hicke Ryan

CHIEF EXECUTIVE OFFICER

Officer
21,000 -10.9%
83.36
US$1,750,560 		21,000 -10.9% 83.36 US$1,750,560
2025-05-16 2025-05-14 S Sale
2.4
Sharma Sanjay

See Remarks*

Officer
20,000 -45.6%
83.40
US$1,668,000 		20,000 -45.6% 83.40 US$1,668,000
2025-05-14 2025-05-14 PrS Proposed sale
2.4
Sharma Sanjay

Officer

Officer
20,000
83.40
US$1,668,033 		20,000 83.40 US$1,668,033
2025-05-14 2025-05-14 PrS Proposed sale
2.9
Hicke Ryan

Officer

Officer
21,000
83.36
US$1,750,642 		21,000 83.36 US$1,750,642
2025-03-07 2025-03-05 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
1,372 -0.0%
76.28
US$104,656 		1,372 -0.0% 76.28 US$104,656
2025-03-05 2025-03-04 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
13,855 -0.2%
77.20
US$1,069,606 		13,855 -0.2% 77.20 US$1,069,606
2025-03-05 2025-03-04 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
47,718 -0.7%
76.49
US$3,649,950 		47,718 -0.7% 76.49 US$3,649,950
2025-03-05 2025-03-04 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
18,427 -0.3%
75.77
US$1,396,214 		18,427 -0.3% 75.77 US$1,396,214
2025-03-05 2025-03-03 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
21,616 -0.3%
80.30
US$1,735,765 		21,616 -0.3% 80.30 US$1,735,765
2025-03-05 2025-03-03 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
19,405 -0.3%
79.55
US$1,543,668 		19,405 -0.3% 79.55 US$1,543,668
2025-03-05 2025-03-03 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
31,821 -0.4%
78.82
US$2,508,131 		31,821 -0.4% 78.82 US$2,508,131
2025-03-05 2025-03-03 S Sale
2.8
Warner Mark Andrew

See Remarks
5,000 -79.4%
80.39
US$401,950 		5,000 -79.4% 80.39 US$401,950
2025-03-03 2025-03-03 PrS Proposed sale
3.2
Alfred Paul West Jr

Affiliate
160,000
80.22
US$12,835,200 		160,000 80.22 US$12,835,200
2025-03-03 2025-03-03 PrS Proposed sale
2.8
Warner Mark Andrew

Officer

Officer
5,000
80.39
US$401,959 		5,000 80.39 US$401,959
2024-12-17 2024-12-16 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
3,738 -0.1%
86.09
US$321,804 		3,738 -0.1% 86.09 US$321,804
2024-12-17 2024-12-16 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
34,672 -0.5%
85.34
US$2,958,908 		34,672 -0.5% 85.34 US$2,958,908
2024-12-17 2024-12-16 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
13,632 -0.2%
84.72
US$1,154,903 		13,632 -0.2% 84.72 US$1,154,903
2024-12-17 2024-12-13 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
500 -0.0%
87.25
US$43,625 		500 -0.0% 87.25 US$43,625
2024-12-17 2024-12-13 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
12,703 -0.2%
86.22
US$1,095,253 		12,703 -0.2% 86.22 US$1,095,253
2024-12-17 2024-12-13 S Sale
3.2
WEST ALFRED P JR

Executive Chairman

Executive Director
80,955 -1.1%
85.64
US$6,932,986 		80,955 -1.1% 85.64 US$6,932,986
2024-12-13 2024-12-13 PrS Proposed sale
3.2
Alfred Paul West Jr

Affiliate
150,000
86.58
US$12,987,000 		150,000 86.58 US$12,987,000
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