SEIC · Sei Investments Company · Form 13F filings for Q2 2026
Sei Investments Company
3 of 76 investors hold it
Together they reported $17 million of it. In Q2 2026, 0 added and 1 reduced.
20 of 83 tracked investors have filed for Q3 2026 so far. The sheet and every stock page stay on Q2 2026 until most have filed, so each count is taken from one group of investors.
Who added and who reduced
Q2 2026 against Q1 2026, among 74 filings that can be compared. An investor counts as adding or reducing when reported shares change by 20% or more, or when a position is opened or closed.
0added or opened
1reduced or sold out
Who holds it
| Investor | Share of their portfolio | Reported value | This quarter |
|---|---|---|---|
| Thomas Gayner | 0.12% | $15M | No change of 20% |
| Kahn Brothers Group | 0.09% | $579K | No change of 20% |
| Joel Greenblatt | 0.00% | $1M | No change of 20% |
Holders over time
How many of the same 76 investors reported a position at each quarter end, up to Q2 2026.
Where to next
Source: SEC Form 13F filings for Q2 2026, the quarter ended Jun 30, 2026, from the 76 investors on the homepage sheet · CUSIP 784117103 · data as of Nov 12, 2026. Weight is the share of the investor’s disclosed portfolio. Filings list long US-listed positions at quarter end. They are not live holdings, omit shorts, can be amended and give no reasons for a change.
Each investor’s filing
- Thomas Gayner · filed Jul 31, 2026 Filing in the portfolio
- Kahn Brothers Group · filed Aug 17, 2026 Form 13F 0001039565-26-000004 ↗Form 13F 0001039565-26-000006 ↗
- Joel Greenblatt · filed Aug 14, 2026 Form 13F 0001398344-26-014644 ↗