SEC Form 4
SEI Investments Co (SEIC) insider trading
In the 12 months to Oct 23, 2026, 11 SEIC insiders reported open-market sales of $53.6M across 26 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $53.6M
- 26 filings · 11 insiders
- Open-market purchases
- $0
- 0 filings
Who traded SEIC, and when
- Sale
SEIC daily close from Oct 23, 2025 to Oct 23, 2026, between $75.18 and $111.63, last $103.07. 26 sale and 0 purchase filings by 11 insiders, marked at their filing dates. Alfred P. West Jr., Executive Chairman → Other: sold $15.5M across 4 filings, first filed Dec 5, 2025, last Oct 1, 2026. Ryan Hicke, CHIEF EXECUTIVE OFFICER → Chief Executive Officer: sold $11.1M across 2 filings, first filed Feb 2, 2026, last Sep 8, 2026. Michael Peterson, EXECUTIVE VICE PRESIDENT → Executive Vice President: sold $9.7M across 4 filings, first filed Nov 13, 2025, last Sep 1, 2026. Philip McCabe, Officer (see filing): sold $5.5M across 3 filings, first filed Dec 8, 2025, last Aug 6, 2026. Sanjay Sharma, See Remarks*: sold $4.2M across 2 filings, first filed Apr 23, 2026, last Jul 28, 2026. Mark Andrew Warner, Other → In Remarks → See Remarks*: sold $2.2M across 3 filings, first filed Feb 26, 2026, last Jul 30, 2026. 5 others: sold $5.2M across 8 filings, first filed Nov 12, 2025, last Sep 24, 2026.
Largest mark · tap a row for others
Ryan Hicke · CHIEF EXECUTIVE OFFICER
Sale $6,989,060
80,000 shares at $87.36 avg
Filed Feb 2, 2026 · traded Jan 29
Close on filing date $88.69
Alfred P. West Jr. · Executive Chairman → Other
Executive Chairman → Other
$15.5M soldRyan Hicke · CHIEF EXECUTIVE OFFICER → Chief Executive Officer
CHIEF EXECUTIVE OFFICER → Chief Executive Officer
$11.1M soldMichael Peterson · EXECUTIVE VICE PRESIDENT → Executive Vice President
EXECUTIVE VICE PRESIDENT → Executive Vice President
$9.7M soldPhilip McCabe · Officer (see filing)
Officer (see filing)
$5.5M soldSanjay Sharma · See Remarks*
See Remarks*
$4.2M soldMark Andrew Warner · Other → In Remarks → See Remarks*
Other → In Remarks → See Remarks*
$2.2M sold5 others
Combined, one mark per week
$5.2M soldHas SEI Investments Co's CEO sold stock?
Yes. Ryan Hicke (CEO) sold 117,500 shares ($11.1M) between Feb 2026 and Sep 2026.
Open-market trades
26 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Alfred P. West Jr. | Executive Chairman → Other | $15.5M | — | 4 | — | |
| Ryan Hicke | CHIEF EXECUTIVE OFFICER → Chief Executive Officer | $11.1M | — | 2 | — | |
| Michael Peterson | EXECUTIVE VICE PRESIDENT → Executive Vice President | $9.7M | — | 4 | — | |
| Philip McCabe | Officer (see filing) | $5.5M | — | 3 | — | |
| Sanjay Sharma | See Remarks* | $4.2M | — | 2 | — | |
| Mark Andrew Warner | Other → In Remarks → See Remarks* | $2.2M | — | 3 | — | |
| Kathryn Mccarthy | Director | $1.9M | — | 2 | — | |
| William Doran | Director | $1.0M | — | 2 | — | |
| Carl Guarino | Director | $1.0M | — | 1 | — | |
| Carmen Romeo | Director | $968.6K | — | 2 | — | |
| Michael Lane | Executive Vice President | $246.7K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Alfred P. West Jr. Other | Sale | 33,877 | $103.36 | $3.5M | 6,784,574 | |
traded | Michael Lane Executive Vice President | Sale | 2,400 | $102.78 | $246.7K | 39,581 | |
traded | Ryan Hicke Chief Executive Officer | Sale | 37,500 | $110.71 | $4.2M | 192,815 | |
traded | Carmen Romeo Director | Sale | 5,000 | $109.70 | $548.5K | 1,560,293 | |
traded | Michael Peterson Executive Vice President | Sale | 37,500 | $111.51 | $4.2M | 20,148 | |
traded | Philip McCabe Officer (see filing) | Sale | 30,000 | $105.12 | $3.2M | 54,884 | |
traded | Kathryn Mccarthy Director | Sale | 10,000 | $103.54 | $1.0M | 77,883 | |
traded | Carl Guarino Director | Sale | 10,000 | $103.20 | $1.0M | 18,308 | |
traded | Michael Peterson Executive Vice President | Sale | 25,000 | $102.05 | $2.6M | 20,148 | |
traded | Mark Andrew Warner See Remarks* | Sale | 15,000 | $102.35 | $1.5M | 921 | |
traded | Sanjay Sharma See Remarks* | Sale | 20,000 | $99.33 | $2.0M | 39,829 | |
traded | Alfred P. West Jr. Other | Sale | 57,332 | $87.26 | $5.0M | 6,820,131 | |
traded | William Doran Director | Sale | 5,000 | $90.50 | $452.5K | 618,802 | |
traded | Kathryn Mccarthy Director | Sale | 10,000 | $91.07 | $910.7K | 77,883 | |
traded | Mark Andrew Warner In Remarks | Sale | 4,000 | $91.16 | $364.6K | 921 | |
traded | Philip McCabe Officer (see filing) | Sale | 15,000 | $91.82 | $1.4M | 54,884 | |
traded | Michael Peterson EXECUTIVE VICE PRESIDENT | Sale | 10,000 | $90.00 | $900.0K | 20,148 | |
traded | Sanjay Sharma See Remarks* | Sale | 25,000 | $90.12 | $2.3M | 41,388 | |
traded | Alfred P. West Jr. Other | Sale | 62,447 | $80.12 | $5.0M | 6,877,154 | |
traded | Mark Andrew Warner Other | Sale | 4,000 | $81.74 | $327.0K | 921 | |
traded | Ryan Hicke CHIEF EXECUTIVE OFFICER | Sale | 80,000 | $87.36 | $7.0M | 260,155 | |
traded | William Doran Director | Sale | 7,000 | $83.85 | $587.0K | 623,802 | |
traded | Philip McCabe Officer (see filing) | Sale | 12,000 | $81.11 | $973.3K | 62,544 | |
traded | Alfred P. West Jr. Executive Chairman | Sale | 24,770 | $80.87 | $2.0M | 6,942,812 | |
traded | Michael Peterson EXECUTIVE VICE PRESIDENT | Sale | 25,000 | $84.21 | $2.1M | 13,500 | |
traded | Carmen Romeo Director | Sale | 5,000 | $84.01 | $420.1K | 1,573,527 |
GET /stocks/filings/vX/form-4?tickers=SEIC&filing_date.gte=2025-10-23&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"SEIC"
],
"issuer_cik": "0000350894",
"owner_cik": "0001059374",
"accession_number": "0000929638-26-003767",
"form_type": "4",
"filing_date": "2026-10-01",
"period_of_report": "2026-09-29",
"issuer_name": "SEI INVESTMENTS CO",
"issuer_trading_symbol": "SEIC",
"owner_name": "WEST ALFRED P JR",
"is_other": true,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-09-29",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 28394,
"transaction_price_per_share": 103.403,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 6790057,
"transaction_value": 2936024.782,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "Represents the weighted average of a range of sale prices from $103.17 to $103.67. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price."
}
]
},
{
"tickers": [
"SEIC"
],
"issuer_cik": "0000350894",
"owner_cik": "0001059374",
"accession_number": "0000929638-26-003767",
"form_type": "4",
"filing_date": "2026-10-01",
"period_of_report": "2026-09-29",
"issuer_name": "SEI INVESTMENTS CO",
"issuer_trading_symbol": "SEIC",
"owner_name": "WEST ALFRED P JR",
"is_other": true,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-09-30",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 5483,
"transaction_price_per_share": 103.162,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 6784574,
"transaction_value": 565637.246,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F2",
"description": "Represents the weighted average of a range of sale prices from $102.96 to $103.89. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 61 records
- Option exercises35 records
- Tax withholding9 records
- Grants and awards16 records
- Gifts1 record
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for SEIC every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Role
- The title on each filing. Someone whose title changed shows more than one.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.