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About SEI INVESTMENTS CO (SEIC)
SEI INVESTMENTS CO files with the SEC under CIK 0000350894 and is classified as security brokers, dealers and flotation companies. It is grouped with Financials companies on this site.
SEIC Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 8 | 146,277 | $15.78M |
| Option exercise | 14 | 220,000 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
SEIC insider transactions (Form 4)
3876 Form 4 filings on record, the earliest from Oct 29, 2024, newest first. Filing history page 3 of 3.
| Traded | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Michael Peterson - Officer | Grant or award | Common Stock | 7,000 | - | - | |
| Michael Peterson - Officer | Grant or award | Option to Purchase Common Stock | 36,000 | - | - | |
| Carmen Romeo - Director | Grant or award | Common Stock | 2,175 | - | - | |
 Carl Guarino - Director | Grant or award | Common Stock | 2,175 | - | - | |
| William Doran - Director | Grant or award | Common Stock | 2,175 | - | - | |
 Kathryn McCarthy - Director | Grant or award | Common Stock | 2,175 | - | - | |
| Alfred P. West Jr. - Officer | Grant or award | Common Stock | 7,600 | - | - | |
| Alfred P. West Jr. - Officer | Option exercise | Common Stock | 35,000 | $40.64 | $1.42M | |
| Alfred P. West Jr. - Officer | Open-market sale | Common Stock | 19,010 | $82.49 | $1.57M | |
| Alfred P. West Jr. - Officer | Open-market sale | Common Stock | 5,984 | $84.23 | $504K | |
| Alfred P. West Jr. - Officer | Option exercise | Option to Purchase Common Stock | 35,000 | - | - | |
| William Doran - Director | Open-market sale | Common Stock | 5,000 | $81.80 | $409K | |
| William Doran - Director | Option exercise | Common Stock | 5,000 | $40.64 | $203K | |
| William Doran - Director | Option exercise | Common Stock | 5,000 | $40.64 | $203K | |
| William Doran - Director | Option exercise | Option to Purchase Common Stock | 5,000 | - | - | |
| William Doran - Director | Option exercise | Option to Purchase Common Stock | 5,000 | - | - | |
| Alfred P. West Jr. - Officer | Open-market sale | Common Stock | 30,000 | $80.24 | $2.41M | |
| Alfred P. West Jr. - Officer | Open-market sale | Common Stock | 100,000 | $80.26 | $8.03M | |
| Alfred P. West Jr. - Officer | Open-market sale | Common Stock | 7,099 | $80.81 | $574K | |
| Michael Peterson - Officer | Option exercise | Common Stock | 10,000 | $64.43 | $644K | |
| Michael Peterson - Officer | Open-market sale | Common Stock | 10,000 | $79.14 | $791K | |
| Michael Peterson - Officer | Option exercise | Option to Purchase Common Stock | 10,000 | - | - | |
| Carmen Romeo - Director | Option exercise | COMMON STOCK | 5,000 | $40.64 | $203K | |
| Carmen Romeo - Director | Open-market sale | COMMON STOCK | 5,000 | $79.64 | $398K | |
| Carmen Romeo - Director | Option exercise | Option to Purchase Common Stock | 5,000 | - | - | |
| Philip McCabe - Officer | Option exercise | Common Stock | 10,500 | $40.64 | $427K | |
| Philip McCabe - Officer | Open-market sale | Common Stock | 10,500 | $75.91 | $797K | |
| Philip McCabe - Officer | Option exercise | Option to Purchase Common Stock | 10,500 | - | - | |
| Ryan Hicke - Officer | Option exercise | Common Stock | 10,000 | $40.64 | $406K | |
| Ryan Hicke - Officer | Open-market sale | Common Stock | 10,000 | $74.90 | $749K | |
| Ryan Hicke - Officer | Option exercise | Option to Purchase Common Stock | 10,000 | - | - | |
| Michael Peterson - Officer | Option exercise | Common Stock | 25,000 | $55.73 | $1.39M | |
| Michael Peterson - Officer | Open-market sale | Common Stock | 20,438 | $74.49 | $1.52M | |
| Michael Peterson - Officer | Open-market sale | Common Stock | 4,562 | $75.04 | $342K | |
| Michael Peterson - Officer | Option exercise | Option to Purchase Common Stock | 25,000 | - | - | |
| Carl Guarino - Director | Option exercise | Common Stock | 10,000 | $40.64 | $406K | |
| Carl Guarino - Director | Open-market sale | Common Stock | 7,564 | $75.77 | $573K | |
| Carl Guarino - Director | Option exercise | Option to Purchase Common Stock | 10,000 | - | - |
Recent SEIC Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Alfred P. West Jr. | Affiliate | 35,000 | $3.67M | View on EDGAR | |
| Michael Lane | Officer | 2,400 |
SEIC insider trading FAQ
What is the latest insider trade for SEIC?
SEI INVESTMENTS CO (SEIC) had 6 insider filings in the last 90 days, with the most recent on 1 October 2026. The full record for SEIC runs to 76 Form 4 filings, the earliest from 29 October 2024. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying SEIC stock?
No insider purchases of SEIC were filed in the last 90 days.
How many insiders are selling SEIC stock?
8 insider sales of SEIC were filed in the last 90 days, totaling $15.78M.
Where can I see SEIC SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects SEIC Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Financials companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Alfred P. West Jr. view on EDGAR
- - Michael Lane view on EDGAR
- - Ryan Hicke view on EDGAR
- - Carmen Romeo view on EDGAR
- - Michael Peterson view on EDGAR
- - Philip McCabe view on EDGAR
- - Kathryn McCarthy view on EDGAR
- - Mark Andrew Warner view on EDGAR
- - Michael Peterson view on EDGAR
Related companies with recent insider activity
Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Financials
- Where SEIC's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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- Up to 3 months of SEIC price history
- The daily trading plan of ranked insider buys, on a delay, with the plan archive
