SEI Investments Company
MX ˙ BMV ˙ US7841171033
SecurityMX:SEIC / SEI Investments Company
InstitutionAllianz Asset Management GmbH
Latest Disclosed Ownership45,291 shares
Latest Disclosed Value $ 3,553,985
Allianz Asset Management GmbH reports 41.18% decrease in ownership of SEIC / SEI Investments Company

On May 11, 2026 - Allianz Asset Management GmbH filed a 13F-HR form disclosing ownership of 45,291 shares of SEI Investments Company (MX:SEIC) valued at $3,553,985 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 77,002 shares of SEI Investments Company. This represents a change in shares of -41.18% 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)
2026-05-11 2026-03-31 13F SEI INVTS COM 784117103 45,291 -31,711 -41.18 3,554 -43.74 0.0014
2026-02-11 2025-12-31 13F SEI INVTS COM 784117103 77,002 -97,264 -55.81 6,316 -57.29 0.0064
2025-11-04 2025-09-30 13F SEI INVTS COM 784117103 174,266 30,411 21.14 14,786 14.39 0.0165
2025-07-28 2025-06-30 13F SEI INVTS COM 784117103 143,855 -49,898 -25.75 12,927 -14.06 0.0155
2025-05-05 2025-03-31 13F SEI INVTS COM 784117103 193,753 -36,748 -15.94 15,041 -20.88 0.0197
2025-02-03 2024-12-31 13F SEI INVTS COM 784117103 230,501 68,176 42.00 19,012 69.27 0.0254
2024-11-13 2024-09-30 13F SEI INVTS COM 784117103 162,325 12,273 8.18 11,231 15.71 0.0157
2024-08-13 2024-06-30 13F SEI INVTS COM 784117103 150,052 34,554 29.92 9,707 16.88 0.0144
2024-05-14 2024-03-31 13F SEI INVTS COM 784117103 115,498 3,740 3.35 8,304 16.92 0.0128
2024-02-12 2023-12-31 13F SEI INVTS COM 784117103 111,758 5,337 5.01 7,102 10.81 0.0116
2023-11-13 2023-09-30 13F SEI INVTS COM 784117103 106,421 47,584 80.87 6,410 82.75 0.0108
2023-08-14 2023-06-30 13F SEI INVTS COM 784117103 58,837 5,180 9.65 3,508 13.61 0.0063
2023-05-11 2023-03-31 13F SEI INVTS COM 784117103 53,657 2,335 4.55 3,088 3.18 0.0055
2023-02-13 2022-12-31 13F SEI INVTS COM 784117103 51,322 28,947 129.37 2,992 172.74 0.0058
2022-11-08 2022-09-30 13F SEI INVTS COM 784117103 22,375 1,928 9.43 1,097 -0.72 0.0022
2022-08-12 2022-06-30 13F SEI INVTS COM 784117103 20,447 20,447 1,105 0.0010
2022-05-13 2022-03-31 13F SEI INVTS COM 784117103 0 -4,797 -100.00 0 -100.00
2022-02-11 2021-12-31 13F SEI INVTS COM 784117103 4,797 1,074 28.85 292 32.13 0.0002
2021-11-10 2021-09-30 13F SEI INVTS COM 784117103 3,723 -2,799 -42.92 221 -45.30 0.0002
2021-08-16 2021-06-30 13F SEI INVTS COM 784117103 6,522 848 14.95 404 17.10 0.0003
2021-05-13 2021-03-31 13F SEI INVTS COM 784117103 5,674 0 0.00 345 5.83 0.0003
2021-02-16 2020-12-31 13F SEI INVTS COM 784117103 5,674 0 0.00 326 13.19 0.0003
2020-11-13 2020-09-30 13F SEI INVTS COM 784117103 5,674 -1,811 -24.20 288 -29.93 0.0003
2020-08-14 2020-06-30 13F SEI INVTS COM 784117103 7,485 -1,271 -14.52 411 1.23 0.0005
2020-05-14 2020-03-31 13F SEI INVESTMENTS COM 784117103 8,756 -226,296 -96.27 406 -97.36 0.0005
2020-02-13 2019-12-31 13F SEI INVESTMENTS COM 784117103 235,052 7,349 3.23 15,391 14.07 0.0141
2019-11-13 2019-09-30 13F SEI INVESTMENTS COM 784117103 227,703 221,822 3,771.84 13,493 3,988.79 0.0133
2019-08-08 2019-06-30 13F SEI INVESTMENTS COM 784117103 5,881 20 0.34 330 7.84 0.0003
2019-05-13 2019-03-31 13F SEI INVESTMENTS COM 784117103 5,861 5,861 306 0.0003
2019-04-02 2018-12-31 13F/A-1 SEI INVESTMENTS COM 784117103 0 -15,545 -100.00 0 -100.00
2019-04-09 2018-09-30 13F/A-1 SEI INVESTMENTS COM 784117103 15,545 -94,253 -85.84 950 -86.16 0.0009
2018-11-13 2018-09-30 13F SEI INVESTMENTS COM 784117103 15,545 -94,253 950
2019-04-09 2018-06-30 13F/A-1 SEI INVESTMENTS COM 784117103 109,798 -291,902 -72.67 6,864 -77.19 0.0067
2018-08-13 2018-06-30 13F SEI INVESTMENTS COM 784117103 109,798 -291,902 6,864
2019-04-09 2018-03-31 13F/A-2 SEI INVESTMENTS COM 784117103 401,700 121,735 43.48 30,091 49.57 0.0288
2018-05-23 2018-03-31 13F/A-1 SEI INVESTMENTS COM 784117103 401,700 0 30,091 0.0287
2018-05-14 2018-03-31 13F SEI INVESTMENTS COM 784117103 401,700 121,735 30,091
2019-04-17 2017-12-31 13F/A-1 SEI INVESTMENTS COM 784117103 279,965 129,089 85.56 20,118 118.39 0.0159
2018-02-13 2017-12-31 13F SEI INVESTMENTS COM 784117103 279,965 129,089 20,118
2019-04-17 2017-09-30 13F/A-1 SEI INVESTMENTS COM 784117103 150,876 -10,175 -6.32 9,212 6.36 0.0080
2017-11-13 2017-09-30 13F SEI INVESTMENTS COM 784117103 150,876 -10,175 9,212
2019-04-17 2017-06-30 13F/A-1 SEI INVESTMENTS COM 784117103 161,051 -10,366 -6.05 8,661 0.17 0.0084
2017-08-14 2017-06-30 13F SEI INVESTMENTS COM 784117103 161,051 -10,366 8,661
2019-04-17 2017-03-31 13F/A-1 SEI INVESTMENTS COM 784117103 171,417 -77,229 -31.06 8,646 -29.55 0.0085
2017-05-15 2017-03-31 13F SEI INVESTMENTS COM 784117103 171,417 -77,229 8,646
2019-04-17 2016-12-31 13F/A-2 SEI INVESTMENTS COM 784117103 248,646 -5,425 -2.14 12,273 5.92 0.0110
2017-03-14 2016-12-31 13F/A-1 SEI INVESTMENTS COM 784117103 248,646 0 12,273 0.0110
2017-02-13 2016-12-31 13F SEI INVESTMENTS COM 784117103 248,646 12,273
2019-04-17 2016-09-30 13F/A-1 SEI INVESTMENTS COM 784117103 254,071 5,670 2.28 11,587 -3.05 0.0113
2016-11-14 2016-09-30 13F SEI INVESTMENTS COM 784117103 254,071 5,670 11,587
2017-01-24 2016-06-30 13F/A-1 SEI INVESTMENTS COM 784117103 248,401 -24,875 -9.10 11,951 1.58 0.0128
2016-08-12 2016-06-30 13F SEI INVESTMENTS COM 784117103 248,401 11,951
2016-05-13 2016-03-31 13F SEI INVESTMENTS COM 784117103 273,276 16,577 6.46 11,765 -12.59 0.0135
2017-01-24 2015-12-31 13F/A-1 SEI INVESTMENTS COM 784117103 256,699 -67,717 -20.87 13,459 -13.98 0.0152
2016-02-16 2015-12-31 13F SEI INVESTMENTS COM 784117103 256,699 13,459
2017-01-24 2015-09-30 13F/A-2 SEI INVESTMENTS COM 784117103 324,416 -3,188 -0.97 15,647 -2.58 0.0186
2015-11-20 2015-09-30 13F/A-1 SEI INVESTMENTS COM 784117103 324,416 0 15,647 0.0163
2015-11-13 2015-09-30 13F SEI INVESTMENTS COM 784117103 324,416 15,647
2015-09-22 2015-06-30 13F/A-1 SEI INVESTMENTS COM 784117103 327,604 -503,442 -60.58 16,062 -56.16 0.0172
2015-08-14 2015-06-30 13F SEI INVESTMENTS COM 784117103 327,604 16,062
2017-01-24 2015-03-31 13F/A-1 SEI INVESTMENTS COM 784117103 831,046 -38,705 -4.45 36,641 5.21 0.0418
2015-05-15 2015-03-31 13F SEI INVESTMENTS COM 784117103 831,046 36,640,818
2015-02-17 2014-12-31 13F SEI INVESTMENTS COM 784117103 869,751 -46,390 -5.06 34,825 5.13 0.0387
2014-11-14 2014-09-30 13F SEI INVESTMENTS COM 784117103 916,141 -56,016 -5.76 33,127 3.98 0.0399
2014-08-13 2014-06-30 13F SEI INVESTMENTS COM 784117103 972,157 -110,854 -10.24 31,858 -12.48 0.0400
2014-05-28 2014-03-31 13F/A-1 SEI INVESTMENTS COM 784117103 1,083,011 -22,940 -2.07 36,400 -5.23 0.0437
2014-05-14 2014-03-31 13F SEI INVESTMENTS COM 784117103 1,083,011 36,400
2014-02-13 2013-12-31 13F SEI INVESTMENTS COM 784117103 1,105,951 -1,128,351 -50.50 38,409 -44.38 0.0489
2013-11-14 2013-09-30 13F SEI INVESTMENTS COM 784117103 2,234,302 -299,338 -11.81 69,062 -4.12 0.0914
2013-08-14 2013-06-30 13F SEI INVESTMENTS COM 784117103 2,533,640 2,533,640 72,031 0.1022
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.