Stocks › SEIC
SEI INVESTMENTS CO
SEIC·Nasdaq·
United States·USD
United States·USD$102.86
-0.40 (-0.39%)
Close · Oct 6, 2026 · Close Prices from Tiingo.com
SEIC
SEI INVESTMENTS CO · Nasdaq
Nasdaq 100S&P 500
Filings
Default90D1Y5YALL
SEICS&P 500 (rebased)
Congress BuyCongress SellInsider BuyInsider SellForm 1448-K ResultsLobbying
Loading price history…
Daily closes, adjusted for splits and dividends · Close Prices from Tiingo.comHover a marker, every one is a filing · move across the line for the crosshair
Congressional Trades
Recent trades of SEIC by members of U.S. Congress · 5 on record
| Politician | Stock | Type | Filed | Traded | |
|---|---|---|---|---|---|
 Tommy TubervilleSenate · R · AL |
SEICSEI INVESTMENTS CO · Stock |
Sale $1,001 - $15,000 |
Nov 10, 2022 | Oct 5, 2022 | Filing ↗ |
| Tommy TubervilleSenate · R · AL |
SEICSEI INVESTMENTS CO · Stock |
Purchase $1,001 - $15,000 |
Jul 23, 2021 | Mar 29, 2021 | Filing ↗ |
 Mikie SherrillHouse · D · NJ |
SEICSEI INVESTMENTS CO · Stock |
Sale $1,001 - $15,000 |
Apr 5, 2020 | Feb 20, 2020 | Filing ↗ |
| Mikie SherrillHouse · D · NJ |
SEICSEI INVESTMENTS CO · Stock |
Purchase $1,001 - $15,000 |
Feb 19, 2020 | Jan 15, 2020 | Filing ↗ |
| Mikie SherrillHouse · D · NJ |
SEICSEI INVESTMENTS CO · Stock |
Sale $1,001 - $15,000 |
Jan 10, 2020 | Dec 12, 2019 | Filing ↗ |
Whale Activity
Position changes in SEIC reported for 2026-06-30 by 3 tracked institutional filers
- Increased0
- New0
- Held0
- Decreased0
- Closed1
- No prior filing2
| Filer | Shares | Value | Change |
|---|---|---|---|
| LOOMIS SAYLES & CO L P | 8.5M | $744.0M | — |
| Foyston, Gordon & Payne Inc | 158.0K | $13.9M | — |
| Point72 Asset Management | 0 | $0 | closed |
KeyVex tracks a curated set of large 13F filers plus the largest positions in recent filings, so this is a sample of institutional activity, not the whole market.
Insider Trading
Net shares bought (+) or sold (−) on the open market by SEIC insiders, by quarter · Form 4
Recent Insider Transactions
2,820 transactions on record · newest first
| Insider | Type | Shares | Price | Value | Date | |
|---|---|---|---|---|---|---|
| WEST ALFRED P JR | Sale | −5,483 | $103.16 | $566K | Sep 30, 2026 | Form 4 ↗ |
| WEST ALFRED P JR | Sale | −28.4K | $103.40 | $2.9M | Sep 29, 2026 | Form 4 ↗ |
| LANE MICHAELExecutive Vice President | Sale | −2,400 | $102.78 | $247K | Sep 22, 2026 | Form 4 ↗ |
| Hicke RyanChief Executive Officer | Sale | −37.5K | $110.71 | $4.2M | Sep 3, 2026 | Form 4 ↗ |
| ROMEO CARMENDirector · Director | Sale | −5,000 | $109.70 | $549K | Sep 1, 2026 | Form 4 ↗ |
| Peterson MichaelExecutive Vice President | Sale | −37.5K | $111.51 | $4.2M | Aug 28, 2026 | Form 4 ↗ |
| McCabe PhilipSee Remarks | Sale | −5,043 | $105.50 | $532K | Aug 5, 2026 | Form 4 ↗ |
| McCabe PhilipSee Remarks | Sale | −25.0K | $105.04 | $2.6M | Aug 4, 2026 | Form 4 ↗ |
| MCCARTHY KATHRYNDirector · Director | Sale | −10.0K | $103.53 | $1.0M | Aug 3, 2026 | Form 4 ↗ |
| Warner Mark AndrewSee Remarks* | Sale | −7,400 | $102.97 | $762K | Jul 28, 2026 | Form 4 ↗ |
| Warner Mark AndrewSee Remarks* | Sale | −5,300 | $102.01 | $541K | Jul 28, 2026 | Form 4 ↗ |
| Warner Mark AndrewSee Remarks* | Sale | −2,300 | $101.11 | $233K | Jul 28, 2026 | Form 4 ↗ |
| Peterson MichaelExecutive Vice President | Sale | −25.0K | $102.05 | $2.6M | Jul 28, 2026 | Form 4 ↗ |
| GUARINO CARLDirector · Director | Sale | −10.0K | $103.19 | $1.0M | Jul 28, 2026 | Form 4 ↗ |
| Sharma SanjaySee Remarks* | Sale | −20.0K | $99.33 | $2.0M | Jul 24, 2026 | Form 4 ↗ |
| WEST ALFRED P JR | Sale | −1,680 | $88.09 | $148K | Jun 29, 2026 | Form 4 ↗ |
| WEST ALFRED P JR | Sale | −5,652 | $87.18 | $493K | Jun 29, 2026 | Form 4 ↗ |
| WEST ALFRED P JR | Sale | −3,838 | $87.67 | $336K | Jun 26, 2026 | Form 4 ↗ |
| WEST ALFRED P JR | Sale | −46.2K | $87.21 | $4.0M | Jun 26, 2026 | Form 4 ↗ |
| DORAN WILLIAMDirector | Sale | −5,000 | $90.50 | $453K | Jun 9, 2026 | Form 4 ↗ |
Fund Holders
Mutual funds and ETFs holding SEIC · SEC Form N-PORT
| Fund | Shares | Value | % of fund | As of |
|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS | 3.4M | $301.3M | 0.01% | Jun 30, 2026 |
| iShares Core S&P Mid-Cap ETF iShares Trust | 3.1M | $274.4M | 0.22% | Jun 30, 2026 |
| Eaton Vance Atlanta Capital SMID-Cap Fund Eaton Vance Growth Trust | 2.7M | $238.0M | 2.71% | Jun 30, 2026 |
| VANGUARD SMALL-CAP INDEX FUND VANGUARD INDEX FUNDS | 2.5M | $217.8M | 0.12% | Jun 30, 2026 |
| Loomis Sayles Growth Fund LOOMIS SAYLES FUNDS II | 2.1M | $187.6M | 1.14% | Jun 30, 2026 |
| Disciplined Value Mid Cap Fund John Hancock Funds III | 2.0M | $178.9M | 0.77% | Jun 30, 2026 |
| VANGUARD SMALL-CAP VALUE INDEX FUND VANGUARD INDEX FUNDS | 1.6M | $137.9M | 0.20% | Jun 30, 2026 |
| LORD ABBETT AFFILIATED FUND INC | 1.0M | $106.8M | 1.56% | Jul 31, 2026 |
| VANGUARD EXTENDED MARKET INDEX FUND VANGUARD INDEX FUNDS | 1.0M | $91.9M | 0.09% | Jun 30, 2026 |
| Fidelity Low-Priced Stock Fund Fidelity Puritan Trust | 892.0K | $91.9M | 0.37% | Jul 31, 2026 |
Mutual funds and ETFs whose N-PORT filings list SEIC's shares (CUSIP 784117103), each fund at its latest report since Mar 7, 2026, largest positions first. Bonds, options and short positions are left out.
Activist & Passive Stakes
Schedule 13D / 13G beneficial-ownership filings
Corporate Lobbying
Estimated quarterly lobbying spending reported under the LDA, filings naming SEI INVESTMENTS CO as client
No lobbying filings found naming SEI INVESTMENTS CO as the client.
Government Contracts
Federal awards to SEI INVESTMENTS CO · USAspending
No federal contract awards found for SEI INVESTMENTS CO.
U.S. Patents
Recent USPTO applications naming SEI INVESTMENTS CO
No USPTO patent applications found for SEI INVESTMENTS CO.
Annual Financials
From SEIC's 10-K filings · XBRL
No annual XBRL figures on record for SEIC. KeyVex's fundamentals cover about 130 large companies so far.
Stock Splits
Every split and reverse split in the price history
- 2-for-1Stock splitJun 22, 2007
- 2-for-1Stock splitMar 1, 2001
- 3-for-1Stock splitJun 20, 2000
- 2-for-1Stock splitJul 7, 1993
Split dates and ratios from the price history · Close Prices from Tiingo.com
About SEI INVESTMENTS CO
From SEC EDGAR company records
Industry (SIC 6211)Security Brokers, Dealers & Flotation Companies
SectorFinancials
HeadquartersOAKS, PA
IncorporatedPA
SEC CIK0000350894 ↗
Former namesSEI CORP