SEI Investments Co
SEIC- Exchange
- Nasdaq
- Industry
- Security Brokers, Dealers & Flotation Companies
- SEC CIK
- 0000350894
In the last 90 days, SEI Investments Co insiders filed 0 open-market purchases and 6 sales; 580 institutions reported holding it in 13F filings for Q2 2026, worth $7.95B in total; Markel Group is the only superinvestor holding it.
Key figures
- Market capClose on Nov 11, 2026
- $13.1B
- Insider buysOpen market, last 90 days
- 0
- Insider sellsLast 90 days, $13.5M in total
- 6
- 13F holdersQ2 2026, +15 vs. previous quarter
- 580
- 13F valueReported value at the end of Q2 2026
- $7.95B
- Superinvestors holdingAt the end of Q2 2026
- 1
Price chart
Financials
See financial statementsFrom SEC filings, in USD.
- Revenue, FY2025
- $2.30B
- +8.1% year over year
- Net income, FY2025
- $715.3M
- +23.1% year over year
- Free cash flow, FY2025
- $585.0M
- −0.9% year over year
- Revenue, Q3 FY2026
- $662.0M
- +14.4% year over year
Revenue flow, FY2025
Green is profit; orange is costs, expenses and taxes. Percentages are shares of revenue.
Short interest
See short dataFrom FINRA, settlement date Oct 30, 2026.
- Short interest
- 4.04M
- Shares sold short
- Change
- +627.4K
- +18.4% vs. previous
- Days to cover
- 4.91
- At average daily volume
Superinvestors holding SEIC, Q2 2026
Go to the superinvestors tab1 superinvestor reports holding SEI Investments Co on Form 13F. Percentages are the stock's share of each portfolio.
Latest insider trades
See all insider tradesOpen-market purchases and sales by SEI Investments Co insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Nov 12, 2026 (view filing)8:16 AM ET | Nov 10 | 2 days | Doran WilliamDirector | SSale | −8.00K | $110.30 | −$882.4K | −1.3%630.8K after | |
| Oct 1, 2026 (view filing)4:05 PM ET | Sep 29-30 | 2 days | West Alfred P JrOther: Chairman Emeritus | SSale | −33.9K | $103.36 | −$3.50M | −0.5%6.78M after | 2 lots |
| Sep 24, 2026 (view filing)4:15 PM ET | Sep 22 | 2 days | Lane MichaelExecutive Vice President | SSale | −2.40K | $102.78 | −$246.7K | −5.7%39.6K after | |
| Sep 8, 2026 (view filing)4:05 PM ET | Sep 3 | 5 days | Hicke RyanChief Executive Officer | SSale | −37.5K | $110.71 | −$4.15M | −16.3%192.8K after | |
| Sep 3, 2026 (view filing)4:09 PM ET | Sep 1 | 2 days | Romeo CarmenDirector | SSale | −5.00K | $109.70 | −$548.5K | −0.3%1.56M after | |
| Sep 1, 2026 (view filing)4:05 PM ET | Aug 28 | 4 days | Peterson MichaelExecutive Vice President | SSale | −37.5K | $111.51 | −$4.18M | −65.0%20.1K after | |
| Aug 6, 2026 (view filing)4:23 PM ET | Aug 4-5 | 2 days | McCabe PhilipSee Remarks | SSale | −30.0K | $105.12 | −$3.15M | −35.3%54.9K after | 2 lots |
| Aug 4, 2026 (view filing)4:24 PM ET | Aug 3 | 1 day | McCarthy KathrynDirector | SSale | −10.0K | $103.54 | −$1.04M | −11.4%77.9K after | |
| Jul 30, 2026 (view filing)4:06 PM ET | Jul 28 | 2 days | Warner Mark AndrewSee Remarks* | SSale | −15.0K | $102.35 | −$1.54M | −94.2%921 after | 3 lots |
| Jul 30, 2026 (view filing)4:06 PM ET | Jul 28 | 2 days | Peterson MichaelExecutive Vice President | SSale | −25.0K | $102.05 | −$2.55M | −55.4%20.1K after |
Top 10 13F holders, Q2 2026
See all 580 holdersThe largest institutional positions in SEI Investments Co at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 9,927,545 | $870.7M | 0.01% | −182,792−1.8% | Reduced |
| Loomis Sayles & Co L P | 8,482,052 | $744.0M | 0.93% | −146,827−1.7% | Reduced |
| Vanguard Portfolio Management LLC | 6,140,822 | $538.6M | 0.02% | +15,179+0.2% | Added |
| Vanguard Capital Management LLC | 4,686,241 | $411.0M | 0.01% | −55,475−1.2% | Reduced |
| State Street Corp | 4,251,584 | $372.9M | 0.01% | +66,406+1.6% | Added |
| Morgan Stanley | 4,119,203 | $361.3M | 0.02% | −673,076−14.0% | Reduced |
| Boston Partners | 3,093,791 | $271.4M | 0.24% | +1,323,752+74.8% | Added |
| Geode Capital Management, LLC | 2,953,161 | $259.1M | 0.01% | +122,829+4.3% | Added |
| Bank of America Corp | 2,908,071 | $255.1M | 0.02% | −12,435−0.4% | Reduced |
| FMR LLC | 2,510,218 | $220.2M | 0.01% | +417,719+20.0% | Added |
Holders of 5% or more of SEIC
See all 3 holders and filingsHolders whose latest Schedule 13D or 13G filing reports 5% or more of SEI Investments Co.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 7.90%9.45M shares | +1.10 ppfrom 6.80% | Jul 16, 20252 filings | Oct 27, 2026 | SEC |
| Loomis Sayles & Co L P | 13G/A | 6.50%7.80M shares | −0.54 ppfrom 7.04% | Feb 12, 202114 filings | Nov 12, 2026 | SEC |
| Vanguard Portfolio Management LLC | 13G | 5.02%6.14M shares | New | Apr 29, 20261 filing | Apr 29, 2026 | SEC |
Politician trades
All politician trades in SEIC2 members of Congress reported 5 trades in SEI Investments Co since 2020. Newest filings:
| Filed | Politician | Type | Amount |
|---|---|---|---|
| Nov 10, 2022 |  Tommy Tuberville Senate · AL | Sell (full) | $1K-$15K |
| Jul 23, 2021 | Tommy Tuberville Senate · AL | Buy | $1K-$15K |
| Apr 5, 2020 |  Mikie Sherrill House · NJ | Sell | $1K-$15K |
| Feb 19, 2020 | Mikie Sherrill House · NJ | Buy | $1K-$15K |
| Jan 10, 2020 | Mikie Sherrill House · NJ | Sell | $1K-$15K |
Senate · AL · Nov 10, 2022
Sell (full)$1K-$15K
Senate · AL · Jul 23, 2021
Buy$1K-$15K
House · NJ · Apr 5, 2020
Sell$1K-$15K
House · NJ · Feb 19, 2020
Buy$1K-$15K
House · NJ · Jan 10, 2020
Sell$1K-$15K