SEI INVESTMENTS CO insider trading
SEIC$103.26+0.83 (+0.81% today)
“Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise.”
Insider Trading vs Stock Price
Insider Trading vs Stock Price data
Showing the 1Y range: Oct 6, 2025 to Oct 5, 2026. Price (+21.0%). 0 insider transactions plotted in this window as 0 markers; nearby trades of the same kind are grouped.
| Date | Category | Person | Role | Action | Amount | Change in holding |
|---|
Open market purchase
Open market sellNet dollar flow · Buy / Sell balance
PremiumQ2 '25Q3 '25Q4 '25Q1 '26Q2 '26Q3 '26
Unlock quarterly net flowKey players
- APAlfred P. West Jr.5.6529%
- CRCarmen Romeo1.3%
- WDWilliam Doran0.5156%
- RHRyan Hicke0.1733%
- KMKathryn McCarthy0.0649%
- SDSean Denham0.0486%
- PMPhilip McCabe0.048%
- SSSanjay Sharma0.0354%
- MLMichael Lane0.0333%
- MPMichael Peterson0.0172%
AI Activity Analysis
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Insider activity
Fromto
| Company | Insider / role | Action | ΔOwn | Avg price | Amount | ||
|---|---|---|---|---|---|---|---|
| SEIC | Alfred P. West Jr. | Open market sell$566K | -0.1% | $103.16 | $566K | Sep 30, 2026 | Oct 1, 2026 |
| SEIC | Alfred P. West Jr. | Open market sell$2.94M | -0.4% | $103.40 | $2.94M | Sep 29, 2026 | Oct 1, 2026 |
| SEIC | Michael Lane | Open market sell$247K | -5.7% | $102.78 | $247K | Sep 22, 2026 | Sep 24, 2026 |
| SEIC | Alfred P. West Jr. | Open market sell$148K | 0.0% | $88.09 | $148K | Jun 29, 2026 | Jun 29, 2026 |
| SEIC | Alfred P. West Jr. | Open market sell$493K | -0.1% | $87.18 | $493K | Jun 29, 2026 | Jun 29, 2026 |
| SEIC | Alfred P. West Jr. | Open market sell$336K | -0.1% | $87.67 | $336K | Jun 26, 2026 | Jun 29, 2026 |
| SEIC | Alfred P. West Jr. | Open market sell$4.03M | -0.7% | $87.21 | $4.03M | Jun 26, 2026 | Jun 29, 2026 |
| SEIC | William Doran | Open market sell$453K | -0.8% | $90.50 | $453K | Jun 9, 2026 | Jun 11, 2026 |
| SEIC | Philip McCabe | Open market sell$1.38M | -20.7% | $91.82 | $1.38M | Apr 23, 2026 | Apr 24, 2026 |
| SEIC | Alfred P. West Jr. | Open market sell$110K | 0.0% | $79.94 | $110K | Mar 11, 2026 | Mar 12, 2026 |
| SEIC | Alfred P. West Jr. | Open market sell$481K | -0.1% | $79.11 | $481K | Mar 11, 2026 | Mar 12, 2026 |
| SEIC | Alfred P. West Jr. | Open market sell$2.37M | -0.4% | $80.47 | $2.37M | Mar 10, 2026 | Mar 12, 2026 |
| SEIC | Alfred P. West Jr. | Open market sell$2.03M | -0.4% | $79.97 | $2.03M | Mar 10, 2026 | Mar 12, 2026 |
| SEIC | Alfred P. West Jr. | Open market sell$14K | 0.0% | $78.88 | $14K | Mar 10, 2026 | Mar 12, 2026 |
| SEIC | William Doran | Open market sell$587K | -1.1% | $83.85 | $587K | Dec 22, 2025 | Dec 23, 2025 |