SEI Investments Company
US ˙ NasdaqGS ˙ US7841171033

SecuritySEIC / SEI Investments Company
InstitutionKBC Group NV
Latest Disclosed Ownership39,715 shares
Latest Disclosed Value $ 3,116
KBC Group NV reports 14.82% decrease in ownership of SEIC / SEI Investments Company

On May 7, 2026 - KBC Group NV filed a 13F-HR form disclosing ownership of 39,715 shares of SEI Investments Company (US:SEIC) valued at $3,116,436 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 46,627 shares of SEI Investments Company. This represents a change in shares of -14.82% during the quarter. The current value of the position is $3,455,602 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)
2026-05-07 2026-03-31 13F SEI INVTS COM 784117103 39,715 -6,912 -14.82 3 0.00 0.0040
2026-01-26 2025-12-31 13F SEI INVTS COM 784117103 46,627 -1,258 -2.63 4 -25.00 0.0087
2026-01-20 2025-09-30 13F SEI INVTS COM 784117103 47,885 1,884 4.10 4 0.00 0.0097
2025-08-08 2025-06-30 13F SEI INVTS COM 784117103 46,001 -227,205 -83.16 4 -80.95 0.0112
2025-04-25 2025-03-31 13F SEI INVTS COM 784117103 273,206 -94,097 -25.62 21 -30.00 0.0658
2025-01-22 2024-12-31 13F SEI INVTS COM 784117103 367,303 1,495 0.41 30 20.00 0.0835
2024-11-06 2024-09-30 13F SEI INVTS COM 784117103 365,808 -21,932 -5.66 25 0.00 0.0765
2024-07-17 2024-06-30 13F SEI INVTS COM 784117103 387,740 3,320 0.86 25 -7.41 0.0758
2024-05-08 2024-03-31 13F SEI INVTS COM 784117103 384,420 124,610 47.96 28 68.75 0.0878
2024-02-13 2023-12-31 13F SEI INVTS COM 784117103 259,810 33,357 14.73 17 23.08 0.0585
2024-02-15 2023-09-30 13F/A-1 SEI INVTS COM 784117103 226,453 -41,775 -15.57 14 -13.33 0.0557
2023-11-22 2023-09-30 13F SEI INVTS COM 784117103 268,228 0 16 0.0666
2024-02-15 2023-06-30 13F/A-1 SEI INVTS COM 784117103 268,228 124,278 86.33 16 87.50 0.0658
2023-07-28 2023-06-30 13F SEI INVTS COM 784117103 268,228 124,278 16 0.0666
2024-02-14 2023-03-31 13F/A-1 SEI INVTS COM 784117103 143,950 -11,182 -7.21 8 -11.11 0.0352
2023-05-04 2023-03-31 13F SEI INVTS COM 784117103 143,950 -25,261 8 0.0390
2024-02-14 2022-12-31 13F/A-1 SEI INVTS COM 784117103 155,132 -14,079 -8.32 9 12.50 0.0439
2023-02-13 2022-12-31 13F SEI INVTS COM 784117103 169,211 0 8 0.0000
2024-02-15 2022-09-30 13F/A-1 SEI INVTS COM 784117103 169,211 28,518 20.27 8 14.29 0.0431
2022-11-08 2022-09-30 13F SEI INVTS COM 784117103 169,211 28,518 8,300 0.0434
2024-02-14 2022-06-30 13F/A-1 SEI INVTS COM 784117103 140,693 4,232 3.10 8 -12.50 0.0379
2022-07-26 2022-06-30 13F SEI INVTS COM 784117103 137,017 556 7,402 0.0373
2024-02-14 2022-03-31 13F/A-1 SEI INVTS COM 784117103 136,461 -43,081 -23.99 8 -20.00 0.0325
2022-05-06 2022-03-31 13F SEI INVTS COM 784117103 136,461 -43,081 8,216 0.0303
2024-02-14 2021-12-31 13F/A-1 SEI INVTS COM 784117103 179,542 115,405 179.94 11 -99.74 0.0361
2022-02-03 2021-12-31 13F SEI INVTS COM 784117103 179,542 115,405 10,941 0.0343
2021-11-10 2021-09-30 13F SEI INVTS COM 784117103 64,137 1,992 3.21 3,803 -1.25 0.0139
2022-02-15 2021-06-30 13F/A-1 SEI INVTS COM 784117103 62,145 -282 -0.45 3,851 1.24 0.0139
2021-08-11 2021-06-30 13F SEI INVTS COM 784117103 62,145 -282 3,851 0.0139
2022-02-14 2021-03-31 13F/A-1 SEI INVTS COM 784117103 62,427 -18,726 -23.07 3,804 -91.84 0.0154
2021-04-26 2021-03-31 13F SEI INVESTMENTS COM 784117103 62,427 -18,726 3,804 0.0154
2022-02-14 2020-12-31 13F/A-1 SEI INVTS COM 784117103 81,153 0 0.00 46,639 1,033.11 0.0219
2021-02-10 2020-12-31 13F SEI INVTS COM 784117103 81,153 0 4,664 0.0215
2022-02-14 2020-09-30 13F/A-1 SEI INVTS COM 784117103 81,153 -1,849 -2.23 4,116 -9.80 0.0242
2020-10-28 2020-09-30 13F SEI INVTS COM 784117103 81,153 -1,849 4,116 0.0243
2022-02-14 2020-06-30 13F/A-1 SEI INVTS COM 784117103 83,002 15,381 22.75 4,563 45.60 0.0302
2020-08-10 2020-06-30 13F SEI INVTS COM 784117103 83,002 15,381 4,563 0.0305
2020-05-04 2020-03-31 13F SEI INVESTMENTS COM 784117103 67,621 23,312 52.61 3,134 8.03 0.0262
2020-02-11 2019-12-31 13F SEI INVESTMENTS COM 784117103 44,309 30,285 215.95 2,901 249.10 0.0183
2019-11-07 2019-09-30 13F SEI INVESTMENTS COM 784117103 14,024 0 0.00 831 5.59 0.0061
2019-08-08 2019-06-30 13F/A-1 SEI INVESTMENTS COM 784117103 14,024 0 0.00 787 7.37 0.0061
2019-07-30 2019-06-30 13F SEI INVESTMENTS COM 784117103 14,024 0 787
2019-08-07 2019-03-31 13F/A-1 SEI INVESTMENTS COM 784117103 14,024 0 0.00 733 13.12 0.0060
2019-05-10 2019-03-31 13F SEI INVESTMENTS COM 784117103 14,024 0 733
2019-01-31 2018-12-31 13F SEI INVESTMENTS COM 784117103 14,024 2,436 21.02 648 -8.47 0.0072
2018-11-14 2018-09-30 13F SEI INVESTMENTS COM 784117103 11,588 -2,548 -18.02 708 -19.91 0.0054
2018-08-03 2018-06-30 13F SEI INVESTMENTS COM 784117103 14,136 0 0.00 884 -16.53 0.0077
2018-08-03 2018-03-31 13F/A-1 SEI INVESTMENTS COM 784117103 14,136 0 0.00 1,059 4.23 0.0098
2018-05-09 2018-03-31 13F SEI INVESTMENTS COM 784117103 14,136 0 1,059
2018-08-03 2017-12-31 13F/A-1 SEI INVESTMENTS COM 784117103 14,136 -1,861 -11.63 1,016 3.99 0.0087
2018-02-07 2017-12-31 13F SEI INVESTMENTS COM 784117103 14,136 -1,861 1,016
2017-11-13 2017-09-30 13F SEI INVESTMENTS COM 784117103 15,997 0 0.00 977 13.60 0.0089
2017-08-04 2017-06-30 13F SEI INVESTMENTS COM 784117103 15,997 0 0.00 860 6.57 0.0083
2017-05-10 2017-03-31 13F SEI INVESTMENTS COM 784117103 15,997 2,036 14.58 807 17.13 0.0073
2017-02-16 2016-12-31 13F SEI INVESTMENTS COM 784117103 13,961 4,165 42.52 689 54.14 0.0068
2016-11-03 2016-09-30 13F SEI INVESTMENTS COM 784117103 9,796 0 0.00 447 -5.10 0.0053
2016-08-03 2016-06-30 13F SEI INVESTMENTS COM 784117103 9,796 0 0.00 471 11.61 0.0067
2016-05-11 2016-03-31 13F SEI INVESTMENTS COM 784117103 9,796 452 4.84 422 -13.88 0.0070
2016-02-11 2015-12-31 13F SEI INVESTMENTS COM 784117103 9,344 -1,655 -15.05 490 -7.72 0.0090
2015-11-12 2015-09-30 13F SEI INVESTMENTS COM 784117103 10,999 -2,107 -16.08 531 -17.29 0.0107
2015-12-16 2015-06-30 13F/A-1 SEI INVESTMENTS COM 784117103 13,106 1,879 16.74 642 29.70 0.0083
2015-07-31 2015-06-30 13F SEI INVESTMENTS COM 784117103 13,106 642
2015-12-16 2015-03-31 13F/A-1 SEI INVESTMENTS COM 784117103 11,227 -34,525 -75.46 495 -72.98 0.0063
2015-04-30 2015-03-31 13F SEI INVESTMENTS COM 784117103 11,227 495
2015-12-15 2014-12-31 13F/A-1 SEI INVESTMENTS COM 784117103 45,752 -231 -0.50 1,832 10.23 0.0218
2015-02-12 2014-12-31 13F SEI INVESTMENTS COM 784117103 45,752 1,832
2014-10-16 2014-09-30 13F SEI INVESTMENTS COM 784117103 45,983 39,721 634.32 1,662 710.73 0.0580
2014-08-01 2014-06-30 13F SEI INVESTMENTS COM 784117103 6,262 -38,386 -85.97 205 -86.33 0.0023
2014-04-30 2014-03-31 13F SEI INVESTMENTS COM 784117103 44,648 -2,085 -4.46 1,500 -7.58 0.0237
2014-01-21 2013-12-31 13F SEI INVESTMENTS COM 784117103 46,733 -2,872 -5.79 1,623 5.87 0.0246
2013-11-06 2013-09-30 13F SEI INVESTMENTS COM 784117103 49,605 -3,113 -5.91 1,533 2.27 0.0247
2013-07-29 2013-06-30 13F SEI INVESTMENTS COM 784117103 52,718 52,718 1,499 0.0278
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.