Tom Gayner's SEIC Position Overview
Tom Gayner (via Markel Group Inc.) currently holds 173.2K shares of SEI Investments Company (SEIC) worth $14.7 M, representing 0.12% of the portfolio. First purchased in 2013-Q2, this long-term strategic position has been held for 50 quarters.
Based on 13F filings since 2013, Tom Gayner has maintained a long-term strategic position in SEIC, representing a significant commitment to this investment thesis. Largest addition occurred in Q2 2022, adding 114.0K shares. Largest reduction occurred in Q2 2023, reducing 416.0K shares.
Analysis based on 13F filings available since 2013 Q2
Tom Gayner's SEI Investments Company (SEIC) Holding Value Over Time
Track share changes against reported price movement
Quarterly SEI Investments Company (SEIC) Trades by Tom Gayner
| Period | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q2 2013 | +130,001 | Add 0.00% | 130,000 | $28.43 |
| Q4 2013 | +70,000 | Add 53.85% | 200,000 | $34.73 |
| Q1 2014 | +27,000 | Add 13.50% | 227,000 | $33.61 |
| Q2 2014 | +10,000 | Add 4.41% | 237,000 | $32.77 |
| Q1 2016 | +3,000 | Add 1.27% | 240,000 | $43.05 |
| Q2 2016 | +6,800 | Add 2.83% | 246,800 | $48.11 |
| Q3 2016 | +25,400 | Add 10.29% | 272,200 | $45.61 |
| Q4 2016 | +18,000 | Add 6.61% | 290,200 | $49.36 |
| Q1 2017 | +14,000 | Add 4.82% | 304,200 | $50.44 |
| Q2 2017 | +2,000 | Add 0.66% | 306,200 | $53.78 |
| Q3 2018 | +23,000 | Add 7.51% | 329,200 | $61.10 |
| Q4 2018 | +34,000 | Add 10.33% | 363,200 | $46.20 |
| Q1 2019 | +20,000 | Add 5.51% | 383,200 | $52.25 |
| Q4 2020 | +43,000 | Add 11.22% | 426,200 | $57.47 |
| Q1 2021 | +1,000 | Add 0.23% | 427,200 | $60.93 |
| Q3 2021 | +4,000 | Add 0.94% | 431,200 | $59.30 |
| Q1 2022 | +14,000 | Add 3.25% | 445,200 | $60.21 |
| Q2 2022 | +114,000 | Add 25.61% | 559,200 | $54.02 |
| Q4 2022 | +30,000 | Add 5.36% | 589,200 | $58.30 |
| Q2 2023 | -416,000 | Reduce 70.60% | 173,200 | $59.62 |
Tom Gayner's SEI Investments Company Investment FAQs
Tom Gayner first purchased SEI Investments Company (SEIC) in Q2 2013, acquiring 130,000 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Tom Gayner has held SEI Investments Company (SEIC) for 50 quarters since Q2 2013. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Tom Gayner's largest addition to SEI Investments Company (SEIC) was in Q2 2013, adding 130,000 shares worth $3.7 M. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
According to the latest 13F filing for Q3 2025, Tom Gayner's firm, Markel Group Inc., owns 173,200 shares of SEI Investments Company (SEIC), valued at approximately $14.7 M. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
As of the Q3 2025 filing, SEI Investments Company (SEIC) represents approximately 0.12% of Tom Gayner's publicly disclosed stock portfolio, making it one of their key holdings. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Tom Gayner's peak holding in SEI Investments Company (SEIC) was 589,200 shares, as reported at the end of Q4 2022. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.