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.
Superinvestors holding SEIC, Q2 2026
1 superinvestor reports holding SEI Investments Co on Form 13F, worth $15.2M in total. Weight is SEI Investments Co's share of each 13F portfolio; actions compare shares with Q1 2026.
| Superinvestor | % of portfolio | Shares | Value | vs. previous quarter |
|---|---|---|---|---|
| Markel GroupTom Gayner | 0.1% | 173,200 | $15.2M | Unchanged |
Moves by quarter
Superinvestors that opened, added to, trimmed or sold out of SEIC each quarter, comparing shares with the quarter before. A superinvestor that didn't file for a quarter isn't listed, and isn't counted as selling.
Q1 2024
1 superinvestor holding at quarter end
- Sold out
- Maverick Capital
Q4 2023
2 superinvestors holding at quarter end
Q2 2023
1 superinvestor holding at quarter end
- Reduced
- Markel Group (−70.6%)
Q4 2022
1 superinvestor holding at quarter end
- Added
- Markel Group (+5.4%)
Q2 2022
1 superinvestor holding at quarter end
- Added
- Markel Group (+25.6%)
Q1 2022
1 superinvestor holding at quarter end
- Added
- Markel Group (+3.2%)
Q4 2021
1 superinvestor holding at quarter end
- Sold out
- Maverick Capital
Q3 2021
2 superinvestors holding at quarter end
- Added
- Markel Group (+0.9%), Maverick Capital (+326.8%)
Q2 2021
2 superinvestors holding at quarter end