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 10 sales; 575 institutions reported holding it in 13F filings for Q2 2026, worth $7.94B in total; Markel Group is the only superinvestor holding it.
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsLast 90 days, $20.4M in total
- 10
- 13F holdersQ2 2026, +16 vs. previous quarter
- 575
- 13F valueReported value at the end of Q2 2026
- $7.94B
- Superinvestors holdingAt the end of Q2 2026
- 1
Price chart
Superinvestors holding SEIC, Q2 2026
1 superinvestor reports holding SEI Investments Co on Form 13F. Percentages are the stock's share of each portfolio.
Latest insider trades
Open-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 |
|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| Jul 30, 2026 (view filing)4:05 PM ET | Jul 28 | 2 days | Guarino CarlDirector | SSale | −10.0K | $103.20 | −$1.03M | −35.3%18.3K after | |
| Jul 28, 2026 (view filing)4:08 PM ET | Jul 24 | 4 days | Sharma SanjaySee Remarks* | SSale | −20.0K | $99.33 | −$1.99M | −33.4%39.8K after |
Top 10 13F holders, Q2 2026
The 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 |