SEI Investments Company
MX ˙ BMV ˙ US7841171033
SecurityMX:SEIC / SEI Investments Company
InstitutionVictory Capital Management Inc
Latest Disclosed Ownership427,591 shares
Latest Disclosed Value $ 33,553,066
Victory Capital Management Inc reports 11.69% increase in ownership of SEIC / SEI Investments Company

On May 15, 2026 - Victory Capital Management Inc filed a 13F-HR form disclosing ownership of 427,591 shares of SEI Investments Company (MX:SEIC) valued at $33,553,066 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 382,841 shares of SEI Investments Company. This represents a change in shares of 11.69% during the quarter.

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 427,591 44,750 11.69 33,553 6.86 0.0161
2026-02-13 2025-12-31 13F SEI INVTS COM 784117103 382,841 247,679 183.25 31,401 173.81 0.0177
2025-11-12 2025-09-30 13F SEI INVTS COM 784117103 135,162 -18,374 -11.97 11,468 -16.87 0.0067
2025-08-13 2025-06-30 13F SEI INVTS COM 784117103 153,536 -21,115 -12.09 13,797 1.76 0.0089
2025-05-02 2025-03-31 13F SEI INVTS COM 784117103 174,651 10,603 6.46 13,558 0.21 0.0139
2025-02-06 2024-12-31 13F SEI INVTS COM 784117103 164,048 2,800 1.74 13,531 21.28 0.0133
2024-11-05 2024-09-30 13F SEI INVTS COM 784117103 161,248 973 0.61 11,157 7.60 0.0107
2024-08-05 2024-06-30 13F SEI INVTS COM 784117103 160,275 13,903 9.50 10,368 -1.48 0.0104
2024-05-03 2024-03-31 13F SEI INVTS COM 784117103 146,372 18,929 14.85 10,524 29.94 0.0103
2024-02-05 2023-12-31 13F SEI INVTS COM 784117103 127,443 2,934 2.36 8,099 8.00 0.0085
2023-11-06 2023-09-30 13F SEI INVTS COM 784117103 124,509 -75,229 -37.66 7,499 -37.03 0.0086
2023-07-27 2023-06-30 13F SEI INVTS COM 784117103 199,738 -2,448 -1.21 11,908 2.35 0.0131
2023-05-02 2023-03-31 13F SEI INVTS COM 784117103 202,186 -10,451 -4.91 11,636 -6.14 0.0131
2023-04-25 2022-12-31 13F/A-3 SEI INVTS COM 784117103 212,637 -92,931 -30.41 12,397 -17.29 0.0143
2023-03-10 2022-12-31 13F/A-2 SEI INVTS COM 784117103 212,637 -92,931 12,397 0.0135
2023-02-10 2022-12-31 13F/A-1 SEI INVTS COM 784117103 212,637 -92,931 12,397 0.0086
2023-02-09 2022-12-31 13F SEI INVTS COM 784117103 212,524 -93,044 13,268 0.0090
2022-11-02 2022-09-30 13F SEI INVTS COM 784117103 305,568 23,641 8.39 14,988 -1.59 0.0175
2022-08-01 2022-06-30 13F SEI INVTS COM 784117103 281,927 30,473 12.12 15,230 8.70 0.0174
2022-05-04 2022-03-31 13F SEI INVTS COM 784117103 251,454 60,271 31.53 14,011 20.26 0.0140
2022-02-07 2021-12-31 13F SEI INVTS COM 784117103 191,183 -14,676 -7.13 11,651 -4.55 0.0107
2021-11-02 2021-09-30 13F SEI INVTS COM 784117103 205,859 -34,805 -14.46 12,207 -18.15 0.0120
2021-08-03 2021-06-30 13F SEI INVTS COM 784117103 240,664 18,234 8.20 14,914 10.04 0.0143
2021-05-04 2021-03-31 13F SEI INVTS COM 784117103 222,430 6,033 2.79 13,553 8.98 0.0139
2021-02-01 2020-12-31 13F SEI INVTS COM 784117103 216,397 5,094 2.41 12,436 16.04 0.0139
2020-11-09 2020-09-30 13F SEI Investments COM 784117103 211,303 27,308 14.84 10,717 5.94 0.0138
2020-08-07 2020-06-30 13F SEI INVTS COM 784117103 183,995 62,965 52.02 10,116 80.35 0.0137
2020-05-12 2020-03-31 13F/A-1 SEI INVESTMENTS COM 784117103 121,030 -22,795 -15.85 5,609 -40.44 0.0094
2020-05-04 2020-03-31 13F SEI INVESTMENTS COM 784117103 121,030 -22,795 5,609 6,138.4805
2020-02-06 2019-12-31 13F/A-1 SEI INVESTMENTS COM 784117103 143,825 14,867 11.53 9,418 23.26 0.0114
2020-02-04 2019-12-31 13F SEI INVESTMENTS COM 784117103 142,225 13,267 9,282 11,126.2466
2019-11-12 2019-09-30 13F SEI INVESTMENTS COM 784117103 128,958 38,313 42.27 7,641 50.27 0.0098
2019-08-15 2019-06-30 13F SEI INVESTMENTS COM 784117103 90,645 18,958 26.45 5,085 35.74 0.0103
2019-05-03 2019-03-31 13F SEI INVESTMENTS CS 784117103 71,687 7,868 12.33 3,746 27.07 0.0085
2019-05-02 2018-12-31 13F/A-1 SEI INVESTMENTS COM 784117103 63,819 482 0.76 2,948 -23.82 0.0074
2019-02-05 2018-12-31 13F SEI INVESTMENTS COM 784117103 63,819 482 2,948
2018-11-01 2018-09-30 13F SEI INVESTMENTS COM 784117103 63,337 3,596 6.02 3,870 3.61 0.0080
2018-08-02 2018-06-30 13F SEI INVESTMENTS COM 784117103 59,741 7,667 14.72 3,735 -4.26 0.0079
2018-05-04 2018-03-31 13F SEI INVESTMENTS COM 784117103 52,074 5,729 12.36 3,901 17.15 0.0085
2018-02-01 2017-12-31 13F SEI INVESTMENTS COM 784117103 46,345 5,228 12.71 3,330 32.62 0.0070
2017-10-27 2017-09-30 13F SEI INVESTMENTS COM 784117103 41,117 13,735 50.16 2,511 70.47 0.0056
2017-08-07 2017-06-30 13F SEI INVESTMENTS COM 784117103 27,382 4,808 21.30 1,473 29.32 0.0034
2017-05-10 2017-03-31 13F SEI INVESTMENTS COM 784117103 22,574 8,903 65.12 1,139 68.74 0.0027
2017-02-09 2016-12-31 13F SEI INVESTMENTS COM 784117103 13,671 1,583 13.10 675 22.50 0.0017
2016-11-02 2016-09-30 13F SEI INVESTMENTS COM 784117103 12,088 -3,664 -23.26 551 -27.31 0.0015
2016-08-09 2016-06-30 13F SEI INVESTMENTS COM 784117103 15,752 835 5.60 758 18.07 0.0030
2016-05-17 2016-03-31 13F/A-2 SEI INVESTMENTS COM 784117103 14,917 -587 -3.79 642 -20.94 0.0027
2016-05-12 2016-03-31 13F/A-1 SEI INVESTMENTS COM 784117103 14,917 0 642 0.0026
2016-05-12 2016-03-31 13F SEI INVESTMENTS COM 784117103 14,917 642
2016-02-10 2015-12-31 13F SEI INVESTMENTS COM 784117103 15,504 362 2.39 812 11.23 0.0034
2015-11-06 2015-09-30 13F SEI INVESTMENTS COM 784117103 15,142 -64,122 -80.90 730 -81.24 0.0030
2015-08-14 2015-06-30 13F/A-01 SEI Investments COM 784117103 79,264 -18,306 -18.76 3,891 -9.55 0.0144
2015-08-07 2015-06-30 13F SEI Investments COM 784117103 79,264 3,891
2015-05-07 2015-03-31 13F SEI Investments COM 784117103 97,570 -2,950 -2.93 4,302 6.88 0.0155
2015-02-11 2014-12-31 13F SEI Investments COM 784117103 100,520 100,520 4,025 0.0148
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.