SEI Investments Company (SEIC) Insider Trading
Over the last 3 months, SEIC insiders made 0 open-market buys and 14 sales, a net sale of -$16.7M (SEC Form 4). Over the last 6 months, 384 institutions increased and 412 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
14
Net (3m)
-$16.7M
Insider trades by month Buys Sells
Mar
Apr
May
Jun
Jul
Aug
Context3-month price +26.9%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 6, 2026 | McCabe Philipofficer: See Remarks | Option | 5,043 | $49.63 |
| Aug 6, 2026 | McCabe Philipofficer: See Remarks | Option | 15,000 | $49.63 |
| Aug 6, 2026 | McCabe Philipofficer: See Remarks | Sell | 24,957 | $105.04 |
| Aug 6, 2026 | McCabe Philipofficer: See Remarks | Option | 9,957 | $49.63 |
| Aug 6, 2026 | McCabe Philipofficer: See Remarks | Sell | 5,043 | $105.50 |
| Aug 4, 2026 | MCCARTHY KATHRYNdirector | Sell | 10,000 | $103.53 |
| Aug 4, 2026 | MCCARTHY KATHRYNdirector | Option | 5,000 | $71.12 |
| Jul 30, 2026 | GUARINO CARLdirector | Sell | 10,000 | $103.19 |
| Jul 30, 2026 | Peterson Michaelofficer: Executive Vice President | Sell | 25,000 | $102.05 |
| Jul 30, 2026 | Peterson Michaelofficer: Executive Vice President | Option | 25,000 | $55.73 |
| Jul 30, 2026 | Warner Mark Andrewofficer: See Remarks* | Sell | 7,400 | $102.97 |
| Jul 30, 2026 | GUARINO CARLdirector | Option | 5,000 | $49.63 |
| Jul 30, 2026 | Warner Mark Andrewofficer: See Remarks* | Option | 2,500 | $64.43 |
| Jul 30, 2026 | Warner Mark Andrewofficer: See Remarks* | Sell | 2,300 | $101.11 |
| Jul 30, 2026 | Warner Mark Andrewofficer: See Remarks* | Option | 5,000 | $56.54 |
| Jul 30, 2026 | Warner Mark Andrewofficer: See Remarks* | Sell | 5,300 | $102.01 |
| Jul 28, 2026 | Sharma Sanjayofficer: See Remarks* | Option | 10,000 | $71.12 |
| Jul 28, 2026 | Sharma Sanjayofficer: See Remarks* | Sell | 20,000 | $99.33 |
| Jul 28, 2026 | Shah Sneha S.officer: See Remarks* | Tax | 3,746 | $96.73 |
| Jun 29, 2026 | WEST ALFRED P JRother: Chairman Emeritus | Sell | 46,162 | $87.21 |
| Jun 29, 2026 | WEST ALFRED P JRother: Chairman Emeritus | Sell | 5,652 | $87.18 |
| Jun 29, 2026 | WEST ALFRED P JRother: Chairman Emeritus | Sell | 3,838 | $87.67 |
| Jun 29, 2026 | WEST ALFRED P JRother: Chairman Emeritus | Sell | 1,680 | $88.09 |
| Jun 11, 2026 | DORAN WILLIAMdirector | Sell | 5,000 | $90.50 |
| May 5, 2026 | MCCARTHY KATHRYNdirector | Sell | 10,000 | $91.07 |
| May 5, 2026 | MCCARTHY KATHRYNdirector | Option | 5,000 | $49.63 |
| Apr 30, 2026 | Warner Mark Andrewofficer: In Remarks | Option | 2,000 | $48.47 |
| Apr 30, 2026 | Warner Mark Andrewofficer: In Remarks | Sell | 4,000 | $91.16 |
| Apr 30, 2026 | Warner Mark Andrewofficer: In Remarks | Option | 4,000 | $48.47 |
| Apr 24, 2026 | McCabe Philipofficer: See Remarks | Sell | 15,000 | $91.82 |
Source: SEIC SEC Form 4 filings, latest Aug 6, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their SEIC positions over the last 6 months (SEC Form 13F).
Increased
384
New positions
155
Reduced
412
Sold out
63
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BLACKROCK, INC. | Increased | 10.1M | May 13, 2026 |
| BlackRock, Inc. | Reduced | 9.9M | Aug 7, 2026 |
| LOOMIS SAYLES & CO L P | Reduced | 8.6M | May 14, 2026 |
| LOOMIS SAYLES & CO L P | Reduced | 8.5M | Aug 14, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 6.1M | Aug 13, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 6.1M | May 8, 2026 |
| MORGAN STANLEY | Reduced | 4.8M | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 4.7M | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 4.7M | Aug 13, 2026 |
| STATE STREET CORP | Increased | 4.3M | Aug 7, 2026 |
| STATE STREET CORP | Reduced | 4.2M | May 15, 2026 |
| MORGAN STANLEY | Reduced | 4.1M | Aug 13, 2026 |
| Boston Partners | Increased | 3.1M | Aug 4, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 3.0M | Aug 12, 2026 |
| BANK OF AMERICA CORP /DE/ | Reduced | 2.9M | May 18, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.