SEICNasdaq

SEI INVESTMENTS CO

Alert me on SEIC

Insider buys, 6 months

Congress trades, 6 months

Signals, 6 months

Six months

After each filing

Oct 2 Sale WEST ALFRED P JR Insider

1 week

+2.2%S&P +1.2%

1 month

Result in6 trading days

3 months

Result in48 trading days

6 months

Result in111 trading days

Sep 25 Sale LANE MICHAEL Insider

1 week

−3.0%S&P −0.2%

1 month

Result in1 trading day

3 months

Result in43 trading days

6 months

Result in106 trading days

Sep 9 Sale Hicke Ryan Insider

1 week

−2.4%S&P −1.1%

1 month

−3.7%S&P +1.8%

3 months

Result in31 trading days

6 months

Result in94 trading days

Sep 4 Sale ROMEO CARMEN Insider

1 week

−4.4%S&P −1.2%

1 month

−6.8%S&P +1.4%

3 months

Result in29 trading days

6 months

Result in92 trading days

Sep 2 Sale Peterson Michael Insider

1 week

−2.2%S&P −1.0%

1 month

−6.1%S&P +0.8%

3 months

Result in27 trading days

6 months

Result in90 trading days

Show all 28

Aug 7 Sale McCabe Philip Insider

1 week

+1.6%S&P +0.4%

1 month

+3.7%S&P −0.9%

3 months

Result in9 trading days

6 months

Result in72 trading days

Aug 5 Sale MCCARTHY KATHRYN Insider

1 week

+0.7%S&P +0.4%

1 month

+6.4%S&P +0.4%

3 months

Result in7 trading days

6 months

Result in70 trading days

Jul 31 Sale GUARINO CARL Insider

1 week

+1.7%S&P +3.5%

1 month

+7.8%S&P +2.7%

3 months

Result in4 trading days

6 months

Result in67 trading days

Jul 31 Sale Warner Mark Andrew Insider

1 week

+1.7%S&P +3.5%

1 month

+7.8%S&P +2.7%

3 months

Result in4 trading days

6 months

Result in67 trading days

Jul 31 Sale Peterson Michael Insider

1 week

+1.7%S&P +3.5%

1 month

+7.8%S&P +2.7%

3 months

Result in4 trading days

6 months

Result in67 trading days

Jul 29 Sale Sharma Sanjay Insider

1 week

+1.8%S&P +5.5%

1 month

+8.2%S&P +5.7%

3 months

Result in2 trading days

6 months

Result in65 trading days

Jun 29 Sale WEST ALFRED P JR Insider

1 week

+10.9%S&P +0.9%

1 month

+19.0%S&P −1.6%

3 months

+21.2%S&P +3.6%

6 months

Result in44 trading days

Jun 11 Sale DORAN WILLIAM Insider

1 week

+1.5%S&P +1.5%

1 month

+7.6%S&P +2.2%

3 months

+21.3%S&P +3.9%

6 months

Result in33 trading days

May 5 Sale MCCARTHY KATHRYN Insider

1 week

+1.7%S&P +2.0%

1 month

−2.4%S&P +4.6%

3 months

+16.1%S&P +6.6%

6 months

Result in7 trading days

Apr 30 Sale Warner Mark Andrew Insider

1 week

−0.9%S&P +1.8%

1 month

−2.6%S&P +5.5%

3 months

+14.2%S&P +4.2%

6 months

Result in4 trading days

Apr 24 Sale Sharma Sanjay Insider

1 week

+1.6%S&P +0.9%

1 month

+2.2%S&P +5.1%

3 months

+14.9%S&P +3.8%

6 months

+15.8%S&P +7.0%

Apr 24 Sale McCabe Philip Insider

1 week

+1.6%S&P +0.9%

1 month

+2.2%S&P +5.1%

3 months

+14.9%S&P +3.8%

6 months

+15.8%S&P +7.0%

Apr 24 Sale Peterson Michael Insider

1 week

+1.6%S&P +0.9%

1 month

+2.2%S&P +5.1%

3 months

+14.9%S&P +3.8%

6 months

+15.8%S&P +7.0%

Mar 12 Sale WEST ALFRED P JR Insider

1 week

−1.6%S&P −0.9%

1 month

−0.4%S&P +3.3%

3 months

+12.0%S&P +11.1%

6 months

+35.9%S&P +15.4%

Feb 26 Sale Warner Mark Andrew Insider

1 week

−1.5%S&P −1.2%

1 month

−9.1%S&P −7.8%

3 months

+6.4%S&P +9.8%

6 months

+34.4%S&P +12.5%

Feb 2 Sale Hicke Ryan Insider

1 week

−3.7%S&P −0.2%

1 month

−7.8%S&P −1.5%

3 months

+2.9%S&P +3.5%

6 months

+18.8%S&P +11.5%

Dec 23, 2025 Sale DORAN WILLIAM Insider

1 week

−4.2%S&P −0.9%

1 month

−0.3%S&P +0.7%

3 months

−10.1%S&P −6.0%

6 months

+2.5%S&P +6.5%

Dec 9, 2025 Sale McCabe Philip Insider

1 week

+1.7%S&P −0.6%

1 month

+7.0%S&P +1.9%

3 months

−2.4%S&P −2.2%

6 months

+9.4%S&P +8.6%

Dec 6, 2025 Sale WEST ALFRED P JR Insider

1 week

+1.3%S&P −0.4%

1 month

+8.5%S&P +1.2%

3 months

−0.9%S&P −0.8%

6 months

+11.1%S&P +6.7%

Nov 13, 2025 Sale Peterson Michael Insider

1 week

−4.2%S&P −2.9%

1 month

−0.3%S&P +1.3%

3 months

−3.4%S&P +1.9%

6 months

+12.5%S&P +10.5%

Nov 12, 2025 Sale ROMEO CARMEN Insider

1 week

−6.3%S&P −3.0%

1 month

−0.8%S&P −0.2%

3 months

−5.5%S&P +0.1%

6 months

+8.9%S&P +8.8%

Sep 30, 2025 Sale MCCARTHY KATHRYN Insider

1 week

−0.1%S&P +0.4%

1 month

−5.0%S&P +3.2%

3 months

−1.4%S&P +3.4%

6 months

−7.5%S&P −1.1%

Sep 25, 2025 Sale GUARINO CARL Insider

1 week

−0.3%S&P +1.7%

1 month

−3.7%S&P +2.9%

3 months

+0.3%S&P +5.2%

6 months

−10.5%S&P −3.1%

Every purchase and sale on this ticker reported by a member of Congress or an insider, measured from the close of the first trading day after it became public to the close 1 week, 1 month, 3 months and 6 months later, each beside the S&P over the same days.

Filings for SEIC

91 held · newest 591 held · newest 2

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See all 91 filings for SEIC

Aeon news and offers by email

New sources, new features and offers like our founding price. A few times a month at most. Stop any time.

Signal history

No signal for this ticker yet. A signal is written when insider buying here scores one dot or more.

Stakes

Jun 30, 2026 Schedule 13G, amended

Loomis, Sayles & Co., L.P.: 7%, 8,462,121 shares

Mar 31, 2026 Schedule 13G, amended

Loomis, Sayles & Co., L.P.: 7.1%, 8,683,520 shares

Mar 31, 2026 Schedule 13G

Vanguard Portfolio Management: 5%, 6,138,027 shares

Mar 13, 2026 Schedule 13G, amended

The Vanguard Group: 0%, 0 shares

Dec 31, 2025 Schedule 13G, amended

Loomis, Sayles & Co., L.P.: 7.2%, 8,808,845 shares

Sep 30, 2025 Schedule 13G, amended

Loomis, Sayles & Co., L.P.: 7.3%, 8,976,122 shares

Schedule 13D is filed within 5 business days of crossing 5 percent by an investor who may seek to influence the company. Schedule 13G is filed by a passive holder, and a large institution has up to 45 days after the quarter end.

Government contracts, last 12 months

Awards of $10M and up, from USAspending · context, not a signal

No contracts of $10M or more in the last 12 months.

Lobbying

Last four quarters

No lobbying reports on file.