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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)
10976 Form 4 filings on record, the earliest from Oct 29, 2024, newest first. Filing history page 1 of 3.
| Traded | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Alfred P. West Jr. | Open-market sale | Common Stock | 28,394 | $103.40 footnote F1 | $2.94M | |
| Alfred P. West Jr. | Open-market sale | Common Stock | 5,483 | $103.16 footnote F2 | $566K | |
| ||||||
| Michael Lane - Officer | Open-market sale | Common Stock | 2,400 | $102.78 footnote F1 | $247K | |
| ||||||
| Ryan Hicke - Officer | Option exercise | Common Stock | 17,500 | $48.47 | $848K | |
| Ryan Hicke - Officer | Option exercise | Common Stock | 20,000 | $64.43 | $1.29M | |
| Ryan Hicke - Officer | Open-market sale | Common Stock | 37,500 | $110.71 footnote F1 | $4.15M | |
| Ryan Hicke - Officer | Option exercise | Option to Purchase Common Stock | 17,500 | - footnote F2 | - | |
| Ryan Hicke - Officer | Option exercise | Option to Purchase Common Stock | 20,000 | - footnote F2 | - | |
| ||||||
| Carmen Romeo - Director | Option exercise | Common Stock | 5,000 | $49.63 | $248K | |
| Carmen Romeo - Director | Open-market sale | Common Stock | 5,000 | $109.70 footnote F1 | $549K | |
| Carmen Romeo - Director | Option exercise | Option to Purchase Common Stock | 5,000 | - footnote F2 | - | |
| ||||||
| Michael Peterson - Officer | Option exercise | Common Stock | 37,500 | $56.54 | $2.12M | |
| Michael Peterson - Officer | Open-market sale | Common Stock | 37,500 | $111.51 footnote F1 | $4.18M | |
| Michael Peterson - Officer | Option exercise | Option to Purchase Common Stock | 37,500 | - footnote F3 | - | |
| ||||||
| Philip McCabe - Officer | Option exercise | Common Stock | 9,957 | $49.63 | $494K | |
| Philip McCabe - Officer | Option exercise | Common Stock | 15,000 | $49.63 | $744K | |
| Philip McCabe - Officer | Open-market sale | Common Stock | 24,957 | $105.04 footnote F1 | $2.62M | |
| Philip McCabe - Officer | Option exercise | Common Stock | 5,043 | $49.63 | $250K | |
| Philip McCabe - Officer | Open-market sale | Common Stock | 5,043 | $105.50 | $532K | |
| Philip McCabe - Officer | Option exercise | Option to Purchase Common Stock | 9,957 | - footnote F2 | - | |
| Philip McCabe - Officer | Option exercise | Option to Purchase Common Stock | 15,000 | - footnote F2 | - | |
| Philip McCabe - Officer | Option exercise | Option to Purchase Common Stock | 5,043 | - footnote F2 | - | |
| ||||||
 Kathryn McCarthy - Director | Option exercise | Common Stock | 5,000 | $71.12 | $356K | |
| Kathryn McCarthy - Director | Option exercise | Common Stock | 5,000 | $71.12 | $356K | |
| Kathryn McCarthy - Director | Open-market sale | Common Stock | 10,000 | $103.54 footnote F1 | $1.04M | |
| Kathryn McCarthy - Director | Option exercise | Option to Purchase Common Stock | 5,000 | - footnote F2 | - | |
| Kathryn McCarthy - Director | Option exercise | Option to Purchase Common Stock | 5,000 | - footnote F2 | - | |
| ||||||
| Mark Andrew Warner - Officer | Option exercise | Common Stock | 2,500 | $64.43 | $161K | |
| Mark Andrew Warner - Officer | Option exercise | Common Stock | 2,500 | $64.43 | $161K | |
| Mark Andrew Warner - Officer | Option exercise | Common Stock | 5,000 | $56.54 | $283K | |
| Mark Andrew Warner - Officer | Option exercise | Common Stock | 5,000 | $56.54 | $283K | |
| Mark Andrew Warner - Officer | Open-market sale | Common Stock | 2,300 | $101.11 footnote F1 | $233K | |
| Mark Andrew Warner - Officer | Open-market sale | Common Stock | 5,300 | $102.01 footnote F2 | $541K | |
| Mark Andrew Warner - Officer | Open-market sale | Common Stock | 7,400 | $102.97 footnote F3 | $762K | |
| Mark Andrew Warner - Officer | Option exercise | Option to Purchase Common Stock | 2,500 | - footnote F4 | - | |
| Mark Andrew Warner - Officer | Option exercise | Option to Purchase Common Stock | 2,500 | - footnote F4 | - | |
| Mark Andrew Warner - Officer | Option exercise | Option to Purchase Common Stock | 5,000 | - footnote F4 | - | |
| Mark Andrew Warner - Officer | Option exercise | Option to Purchase Common Stock | 5,000 | - footnote F4 | - | |
| ||||||
| Michael Peterson - Officer | Option exercise | Common Stock | 25,000 | $55.73 | $1.39M | |
| Michael Peterson - Officer | Open-market sale | Common Stock | 25,000 | $102.05 footnote F1 | $2.55M | |
| Michael Peterson - Officer | Option exercise | Option to Purchase Common Stock | 25,000 | - footnote F2 | - | |
| ||||||
 Carl Guarino - Director | Option exercise | Common Stock | 5,000 | $49.63 | $248K | |
| Carl Guarino - Director | Option exercise | Common Stock | 5,000 | $49.63 | $248K | |
| Carl Guarino - Director | Open-market sale | Common Stock | 10,000 | $103.20 footnote F1 | $1.03M | |
| Carl Guarino - Director | Option exercise | Option to Purchase Common Stock | 5,000 | - footnote F2 | - | |
| Carl Guarino - Director | Option exercise | Option to Purchase Common Stock | 5,000 | - footnote F2 | - | |
| ||||||
| Sanjay Sharma - Officer | Option exercise | Common Stock | 10,000 | $71.12 | $711K | |
| Sanjay Sharma - Officer | Option exercise | Common Stock | 10,000 | $71.12 | $711K | |
| Sanjay Sharma - Officer | Open-market sale | Common Stock | 20,000 | $99.33 footnote F1 | $1.99M | |
| Sanjay Sharma - Officer | Option exercise | Option to Purchase Common Stock | 10,000 | - footnote F2 | - | |
| Sanjay Sharma - Officer | Option exercise | Option to Purchase Common Stock | 10,000 | - footnote F2 | - | |
| ||||||
| Sneha S. Shah - Officer | Tax withholding / forfeiture | Common Stock | 3,746 | $96.73 | $362K | |
| Alfred P. West Jr. | Open-market sale | Common Stock | 1,680 | $88.09 footnote F4 | $148K | |
| Alfred P. West Jr. | Open-market sale | Common Stock | 46,162 | $87.21 footnote F1 | $4.03M | |
| Alfred P. West Jr. | Open-market sale | Common Stock | 3,838 | $87.67 footnote F2 | $336K | |
| Alfred P. West Jr. | Open-market sale | Common Stock | 5,652 | $87.18 footnote F3 | $493K | |
| ||||||
| William Doran - Director | Open-market sale | Common Stock | 5,000 | $90.50 | $453K | |
| Kathryn McCarthy - Director | Option exercise | Common Stock | 5,000 | $49.63 | $248K | |
| Kathryn McCarthy - Director | Option exercise | Common Stock | 5,000 | $49.63 | $248K | |
| Kathryn McCarthy - Director | Open-market sale | Common Stock | 10,000 | $91.07 footnote F1 | $911K | |
| Kathryn McCarthy - Director | Option exercise | STOCK OPTION (RIGHT TO PURCHASE) | 5,000 | - footnote F2 | - | |
| Kathryn McCarthy - Director | Option exercise | STOCK OPTION (RIGHT TO PURCHASE) | 5,000 | - footnote F2 | - | |
| ||||||
| Philip McCabe - Officer | Open-market sale | Common Stock | 15,000 | $91.82 footnote F1 | $1.38M | |
| ||||||
| Sanjay Sharma - Officer | Option exercise | Common Stock | 12,500 | $49.63 | $620K | |
| Sanjay Sharma - Officer | Option exercise | Common Stock | 12,500 | $49.63 | $620K | |
| Sanjay Sharma - Officer | Open-market sale | Common Stock | 23,441 | $90.08 footnote F1 | $2.11M | |
| Sanjay Sharma - Officer | Open-market sale | Common Stock | 1,559 | $90.73 footnote F2 | $141K | |
| Sanjay Sharma - Officer | Option exercise | Option to Purchase Common Stock | 12,500 | - footnote F4 | - | |
| Sanjay Sharma - Officer | Option exercise | Option to Purchase Common Stock | 12,500 | - footnote F4 | - | |
| ||||||
| Michael Peterson - Officer | Option exercise | Common Stock | 10,000 | $48.47 | $485K | |
| Michael Peterson - Officer | Open-market sale | Common Stock | 10,000 | $90.00 | $900K | |
| Michael Peterson - Officer | Option exercise | Option to Purchase Common Stock | 10,000 | - footnote F2 | - | |
| ||||||
| Ryan Hicke - Officer | Tax withholding / forfeiture | Common Stock | 4,349 | $77.21 | $336K | |
| Sean Denham - Officer | Tax withholding / forfeiture | Common Stock | 7,673 | $78.77 | $604K | |
| Alfred P. West Jr. | Open-market sale | Common Stock | 25,391 | $79.97 footnote F2 | $2.03M | |
| Alfred P. West Jr. | Open-market sale | Common Stock | 29,431 | $80.47 footnote F3 | $2.37M | |
| Alfred P. West Jr. | Open-market sale | Common Stock | 6,076 | $79.11 footnote F4 | $481K | |
| Alfred P. West Jr. | Open-market sale | Common Stock | 1,371 | $79.94 footnote F5 | $110K | |
| Alfred P. West Jr. | Open-market sale | Common Stock | 178 | $78.88 footnote F1 | $14K | |
| ||||||
| Mark Andrew Warner | Grant or award | Common Stock | 2,000 | $71.12 | $142K | |
| Mark Andrew Warner | Grant or award | Common Stock | 2,000 | $71.12 | $142K | |
| Mark Andrew Warner | Open-market sale | Common Stock | 4,000 | $81.74 footnote F1 | $327K | |
| Mark Andrew Warner | Option exercise | STOCK OPTION RIGHT TO PURCHASE | 2,000 | - footnote F2 | - | |
| Mark Andrew Warner | Option exercise | STOCK OPTION RIGHT TO PURCHASE | 2,000 | - footnote F2 | - | |
| ||||||
| Ryan Hicke - Officer | Option exercise | Common Stock | 12,500 | $71.12 | $889K | |
| Ryan Hicke - Officer | Option exercise | Common Stock | 12,500 | $71.12 | $889K | |
| Ryan Hicke - Officer | Option exercise | Common Stock | 17,500 | $48.47 | $848K | |
| Ryan Hicke - Officer | Option exercise | Common Stock | 20,000 | $64.43 | $1.29M | |
| Ryan Hicke - Officer | Option exercise | Common Stock | 17,500 | $56.54 | $989K | |
| Ryan Hicke - Officer | Open-market sale | Common Stock | 17,009 | $86.75 footnote F1 | $1.48M | |
| Ryan Hicke - Officer | Open-market sale | Common Stock | 49,937 | $87.39 footnote F2 | $4.36M | |
| Ryan Hicke - Officer | Open-market sale | Common Stock | 13,054 | $88.06 footnote F3 | $1.15M | |
| Ryan Hicke - Officer | Option exercise | Option to Purchase Common Stock | 12,500 | - footnote F4 | - | |
| Ryan Hicke - Officer | Option exercise | Option to Purchase Common Stock | 12,500 | - footnote F4 | - | |
| Ryan Hicke - Officer | Option exercise | Option to Purchase Common Stock | 17,500 | - footnote F4 | - | |
| Ryan Hicke - Officer | Option exercise | Option to Purchase Common Stock | 17,500 | - footnote F4 | - | |
| Ryan Hicke - Officer | Option exercise | Option to Purchase Common Stock | 20,000 | - footnote F4 | - | |
| ||||||
| Karin A. Risi - Director | Grant or award | Common Stock | 2,266 footnote F1 | - footnote F2 | - | |
| ||||||
| Michael Lane - Officer | Grant or award | Common Stock | 8,916 footnote F1 | - footnote F2 | - | |
| Michael Lane - Officer | Grant or award | Option to Purchase Common Stock | 49,650 | - footnote F2 | - | |
| ||||||
| Sean Denham - Officer | Grant or award | Common Stock | 13,254 footnote F1 | - footnote F2 | - | |
| Sean Denham - Officer | Grant or award | Option to Purchase Common Stock | 49,000 | - footnote F2 | - | |
| ||||||
| Thomas C. Naratil - Director | Grant or award | Common Stock | 2,266 footnote F1 | - footnote F2 | - | |
| ||||||
| Jonathan Brassington - Director | Grant or award | Common Stock | 2,266 footnote F1 | - footnote F2 | - | |
| ||||||
| Philip McCabe - Officer | Grant or award | Common Stock | 8,434 footnote F1 | - footnote F2 | - | |
| Philip McCabe - Officer | Grant or award | Option to Purchase Common Stock | 47,000 | - footnote F2 | - | |
| ||||||
| Sanjay Sharma - Officer | Grant or award | Common Stock | 8,434 footnote F1 | - footnote F2 | - | |
| Sanjay Sharma - Officer | Grant or award | Common Stock | 7,500 footnote F1 | - footnote F2 | - | |
| Sanjay Sharma - Officer | Grant or award | Option to Purchase Common Stock | 47,000 | - footnote F2 | - | |
| ||||||
Item 2.02, 7.01, 8.01, 9.01
Item 2.02, 7.01, 9.01
Item 5.07, 8.01, 9.01
Item 2.02, 7.01, 9.01
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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