SEI Investments Company
US ˙ NasdaqGS ˙ US7841171033

SecuritySEIC / SEI Investments Company
InstitutionQube Research & Technologies Ltd
Latest Disclosed Ownership124,992 shares
Latest Disclosed Value $ 9,808,122
Qube Research & Technologies Ltd reports 77.81% decrease in ownership of SEIC / SEI Investments Company

On May 15, 2026 - Qube Research & Technologies Ltd filed a 13F-HR form disclosing ownership of 124,992 shares of SEI Investments Company (US:SEIC) valued at $9,808,122 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 563,212 shares of SEI Investments Company. This represents a change in shares of -77.81% during the quarter. The current value of the position is $11,071,791 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F SEI INVTS COM 784117103 124,992 -438,220 -77.81 9,808 -78.77 0.0109
2026-02-17 2025-12-31 13F SEI INVTS COM 784117103 563,212 -203,563 -26.55 46,195 -29.00 0.0469
2025-11-14 2025-09-30 13F SEI INVTS COM 784117103 766,775 346,696 82.53 65,061 72.35 0.0672
2025-08-14 2025-06-30 13F SEI INVTS COM 784117103 420,079 181,586 76.14 37,748 103.89 0.0384
2025-05-15 2025-03-31 13F SEI INVTS COM 784117103 238,493 -33,009 -12.16 18,514 -17.32 0.0215
2025-02-14 2024-12-31 13F SEI INVTS COM 784117103 271,502 -120,430 -30.73 22,393 -17.42 0.0294
2024-11-14 2024-09-30 13F SEI INVTS COM 784117103 391,932 240,484 158.79 27,118 176.79 0.0400
2024-08-14 2024-06-30 13F SEI INVTS COM 784117103 151,448 -168,842 -52.72 9,797 -57.46 0.0155
2024-05-14 2024-03-31 13F SEI INVTS COM 784117103 320,290 -145,949 -31.30 23,029 -22.28 0.0365
2024-02-13 2023-12-31 13F SEI INVTS COM 784117103 466,239 62,225 15.40 29,629 21.76 0.0577
2023-11-13 2023-09-30 13F SEI INVTS COM 784117103 404,014 55,304 15.86 24,334 17.04 0.0636
2023-08-14 2023-06-30 13F SEI INVTS COM 784117103 348,710 236,297 210.20 20,790 221.38 0.0756
2023-05-15 2023-03-31 13F SEI INVTS COM 784117103 112,413 -17,322 -13.35 6,469 -14.47 0.0278
2023-02-14 2022-12-31 13F SEI INVTS COM 784117103 129,735 24,938 23.80 7,564 47.14 0.0405
2022-11-14 2022-09-30 13F SEI INVTS COM 784117103 104,797 101,054 2,699.81 5,140 2,444.55 0.0306
2022-08-15 2022-06-30 13F SEI INVTS COM 784117103 3,743 -4,314 -53.54 202 -58.35 0.0015
2022-05-09 2022-03-31 13F SEI INVTS COM 784117103 8,057 -178,544 -95.68 485 -95.73 0.0041
2022-02-10 2021-12-31 13F/A-1 SEI INVTS COM 784117103 186,601 186,601 11,371 0.0878
2022-02-01 2021-12-31 13F SEI INVTS COM 784117103 186,601 186,601 11,371 0.0879
2021-11-12 2021-09-30 13F SEI INVTS COM 784117103 0 -53,395 -100.00 0 -100.00
2021-08-13 2021-06-30 13F SEI INVTS COM 784117103 53,395 23,985 81.55 3,309 84.65 0.0377
2021-05-14 2021-03-31 13F SEI INVTS COM 784117103 29,410 -34,439 -53.94 1,792 -51.16 0.0284
2021-02-16 2020-12-31 13F SEI INVTS COM 784117103 63,849 42,080 193.30 3,669 232.34 0.0522
2020-11-12 2020-09-30 13F SEI INVTS COM 784117103 21,769 -46,025 -67.89 1,104 -70.38 0.0158
2020-08-14 2020-06-30 13F SEI INVTS COM 784117103 67,794 67,794 3,727 0.0547
2020-05-15 2020-03-31 13F SEI INVESTMENTS COM 784117103 0 -4,019 -100.00 0 -100.00
2020-02-13 2019-12-31 13F SEI INVESTMENTS COM 784117103 4,019 4,019 263 0.0083
2019-11-13 2019-09-30 13F SEI INVESTMENTS COM 784117103 0 -5,723 -100.00 0 -100.00
2019-08-02 2019-06-30 13F SEI INVESTMENTS COM 784117103 5,723 5,723 321 0.0764
2019-02-14 2018-12-31 13F SEI INVESTMENTS COM 784117103 0 -5,065 -100.00 0 -100.00
2018-11-14 2018-09-30 13F SEI INVESTMENTS COM 784117103 5,065 1,386 37.67 309 34.35 0.0411
2018-08-15 2018-06-30 13F/A-1 SEI INVESTMENTS COM 784117103 3,679 3,679 230 0.1451
2018-08-14 2018-06-30 13F SEI INVESTMENTS COM 784117103 3,679 230 0.1451
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.