Alfred P. West Jr. - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Alfred P. West Jr. has filed 1 SEC Form 4 filing across 1 company in the last 90 days - selling. Lifetime open-market sales: $49.60M.
Profile
Alfred P. West Jr. is Executive Chairman at SEI INVESTMENTS CO (SEIC). West has reported 8 insider filings with the SEC since 2024. The most recent filing was in June 2026.
| Role | Insider |
|---|---|
| Notability | 40/100 |
Board memberships
- SEI INVESTMENTS CO
Reported roles
- Executive Chairman
Trading Pattern
InsiderAlpha's records for Alfred P. West Jr. go back to 2024: 8 primary Form 4 filings, an average of 2.7 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Career & Filing History
Every role Alfred P. West Jr. has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Insider at SEI INVESTMENTS CO (SEIC) - 2 filings, 2026
- Executive Chairman at SEI INVESTMENTS CO (SEIC) - 2 filings, 2024 to 2025
- Executive Chairman, Director at SEI INVESTMENTS CO (SEIC) - 4 filings, 2024 to 2025
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-06-29 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 1.7K | $88.09 | $148K |
| 2026-06-29 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 5.7K | $87.18 | $493K |
| 2026-06-29 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 3.8K | $87.67 | $336K |
| 2026-06-29 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 46.2K | $87.21 | $4.03M |
| 2026-03-12 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 1.4K | $79.94 | $110K |
| 2026-03-12 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 6.1K | $79.11 | $481K |
| 2026-03-12 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 29.4K | $80.47 | $2.37M |
| 2026-03-12 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 25.4K | $79.97 | $2.03M |
| 2026-03-12 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 178 | $78.88 | $14K |
| 2025-12-05 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 24.8K | $80.87 | $2.00M |
| 2025-12-05 | SEIC | SEI INVESTMENTS CO | M - Option exercise | 30.0K | $53.34 | $1.60M |
| 2025-05-28 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 1.6K | $85.21 | $139K |
| 2025-05-28 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 64.5K | $84.26 | $5.43M |
| 2025-05-28 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 75.0K | $85.78 | $6.43M |
| 2024-12-17 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 3.7K | $86.09 | $322K |
| 2024-12-17 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 34.7K | $85.34 | $2.96M |
| 2024-12-17 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 13.6K | $84.72 | $1.15M |
| 2024-12-17 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 500 | $87.25 | $44K |
| 2024-12-17 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 12.7K | $86.22 | $1.10M |
| 2024-12-17 | SEIC | SEI INVESTMENTS CO | S - Open-market sale | 81.0K | $85.64 | $6.93M |
Companies - Last 90 Days
- SEI INVESTMENTS CO (SEIC) - 1 filing, last 2026-06-29
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Alfred P. West Jr. has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Ryan Hicke - $10.08M of SEIC open-market activity in the last 12 months
- Michael Peterson - $6.24M of SEIC open-market activity in the last 12 months
- Sanjay Sharma - $4.24M of SEIC open-market activity in the last 12 months
- Carl Guarino - $1.90M of SEIC open-market activity in the last 12 months
- Mark Andrew Warner - $1.86M of SEIC open-market activity in the last 12 months
- Kathryn McCarthy - $1.77M of SEIC open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Amwal Investments LLC
- Apollo Principal Holdings B GP, LLC
- Apollo Principal Holdings B, L.P.
- ARCH Venture Partners XII, LLC
- ARCH Venture Partners XIII, LLC
- Audax Private Credit Business, LP
- Milton C. Ault III
- BAIN CAPITAL INVESTORS LLC
Frequently Asked Questions
Who is Alfred P. West Jr.?
Alfred P. West Jr. is Executive Chairman at SEI INVESTMENTS CO (SEIC). West has reported 8 insider filings with the SEC since 2024. The most recent filing was in June 2026.…
How many SEC Form 4 filings has Alfred P. West Jr. submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Alfred P. West Jr. been buying or selling stock?
Recorded transactions: 0 open-market purchases and 24 open-market sales ($49.60M) across all tracked filings.
Where can I see all of Alfred P. West Jr.'s SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Open the live Alfred P. West Jr. profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.