SEI Investments Company
MX ˙ BMV ˙ US7841171033
SecurityMX:SEIC / SEI Investments Company
InstitutionJpmorgan Chase & Co
Latest Disclosed Ownership461,660 shares
Latest Disclosed Value $ 35,644,775
Jpmorgan Chase & Co reports 6.50% increase in ownership of SEIC / SEI Investments Company

On May 13, 2026 - Jpmorgan Chase & Co filed a 13F-HR/A form disclosing ownership of 461,660 shares of SEI Investments Company (MX:SEIC) valued at $35,644,775 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 433,470 shares of SEI Investments Company. This represents a change in shares of 6.50% 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)
2026-05-13 2026-03-31 13F/A-1 SEI INVTS COMMON 784117103 461,660 28,190 6.50 35,645 0.26 0.0002
2026-02-11 2025-12-31 13F SEI INVTS COMMON 784117103 433,470 52,336 13.73 35,553 9.94 0.0022
2025-11-26 2025-09-30 13F/A-1 SEI INVTS COMMON 784117103 381,134 9,106 2.45 32,339 -3.26 0.0019
2025-11-07 2025-09-30 13F SEI INVTS COMMON 784117103 381,134 9,106 32,339 0.0019
2025-08-12 2025-06-30 13F SEI INVTS COMMON 784117103 372,028 -116,251 -23.81 33,430 -11.81 0.0022
2025-05-12 2025-03-31 13F SEI INVTS COMMON 784117103 488,279 29,398 6.41 37,905 0.15 0.0028
2025-02-12 2024-12-31 13F SEI INVTS COMMON 784117103 458,881 -49,035 -9.65 37,849 7.70 0.0028
2024-12-26 2024-09-30 13F/A-1 SEI INVTS COMMON 784117103 507,916 60,824 13.60 35,143 21.51 0.0027
2024-11-08 2024-09-30 13F SEI INVTS COMMON 784117103 507,916 60,824 35,143 0.0027
2024-12-26 2024-06-30 13F/A-1 SEI INVTS COMMON 784117103 447,092 10,707 2.45 28,922 -7.82 0.0024
2024-08-12 2024-06-30 13F SEI INVTS COMMON 784117103 447,092 10,707 28,922 0.0024
2024-12-26 2024-03-31 13F/A-1 SEI INVTS COMMON 784117103 436,385 2,928 0.68 31,376 13.90 0.0027
2024-05-10 2024-03-31 13F SEI INVTS COMMON 784117103 436,385 2,928 31,376 0.0027
2024-12-26 2023-12-31 13F/A-1 SEI INVTS COMMON 784117103 433,457 138,417 46.91 27,546 55.01 0.0026
2024-02-12 2023-12-31 13F SEI INVTS COMMON 784117103 433,457 138,417 27,546 0.0026
2023-11-14 2023-09-30 13F SEI INVTS COMMON 784117103 295,040 -62,254 -17.42 17,770 -16.58 0.0020
2023-08-11 2023-06-30 13F Sei Inv COM 784117103 357,294 48,958 15.88 21,302 20.05 0.0023
2023-05-18 2023-03-31 13F/A-1 SEI INVTS COMMON 784117103 308,336 70,448 29.61 17,744 136,392.31 0.0022
2023-05-11 2023-03-31 13F SEI INVTS COMMON 784117103 185,879 -52,009 17,744 0.0003
2023-02-13 2022-12-31 13F SEI INVTS COMMON 784117103 237,888 -211,576 -47.07 14 -99.94 0.0018
2022-11-14 2022-09-30 13F SEI INVTS COMMON 784117103 449,464 117,156 35.26 22,045 22.81 0.0032
2022-08-11 2022-06-30 13F SEI INVTS COMMON 784117103 332,308 -76,344 -18.68 17,951 -27.04 0.0025
2022-05-11 2022-03-31 13F SEI INVTS COMMON 784117103 408,652 145,432 55.25 24,605 53.39 0.0030
2022-02-11 2021-12-31 13F/A-1 SEI INVTS COMMON 784117103 263,220 66,382 33.72 16,041 37.42 0.0019
2022-02-10 2021-12-31 13F SEI INVTS COMMON 784117103 263,220 66,382 16,041 0.0018
2021-11-12 2021-09-30 13F SEI INVTS COMMON 784117103 196,838 -126,384 -39.10 11,673 -41.72 0.0014
2021-08-12 2021-06-30 13F SEI INVTS COMMON 784117103 323,222 34,679 12.02 20,030 13.92 0.0024
2021-05-12 2021-03-31 13F SEI INVTS COMMON 784117103 288,543 14,681 5.36 17,582 11.70 0.0023
2021-02-19 2020-12-31 13F/A-1 SEI INVTS COMMON 784117103 273,862 -74,249 -21.33 15,740 -11.46 0.0023
2021-02-11 2020-12-31 13F SEI INVTS COMMON 784117103 273,862 -74,249 15,740 389.2614
2020-11-12 2020-09-30 13F/A-1 SEI INVTS COMMON 784117103 348,111 45,802 15.15 17,778 6.97 0.0030
2020-11-12 2020-09-30 13F SEI INVTS COMMON 784117103 348,111 17,778
2020-08-11 2020-06-30 13F SEI INVTS COMMON 784117103 302,309 2,091 0.70 16,620 19.47 0.0032
2020-05-12 2020-03-31 13F SEI INVESTMENTS COMMON 784117103 300,218 63,543 26.85 13,912 -10.24 0.0033
2020-02-11 2019-12-31 13F SEI INVESTMENTS COMMON 784117103 236,675 -80,365 -25.35 15,499 -17.50 0.0029
2019-11-12 2019-09-30 13F SEI INVESTMENTS COMMON 784117103 317,040 84,580 36.38 18,787 45.98 0.0037
2019-08-07 2019-06-30 13F SEI INVESTMENTS COMMON 784117103 232,460 50,710 27.90 12,870 35.52 0.0025
2019-05-07 2019-03-31 13F SEI INVESTMENTS COMMON 784117103 181,750 -19,110 -9.51 9,497 2.33 0.0019
2019-02-11 2018-12-31 13F SEI INVESTMENTS COMMON 784117103 200,860 -88,824 -30.66 9,281 -47.56 0.0021
2018-11-13 2018-09-30 13F/A-1 SEI INVESTMENTS COMMON 784117103 289,684 -142,997 -33.05 17,699 -34.58 0.0034
2018-11-07 2018-09-30 13F SEI INVESTMENTS COMMON 784117103 289,684 -142,997 17,699
2018-08-14 2018-06-30 13F SEI INVESTMENTS COMMON 784117103 432,681 -98,780 -18.59 27,053 -32.04 0.0056
2018-05-10 2018-03-31 13F SEI INVESTMENTS COMMON 784117103 531,461 64,353 13.78 39,810 18.60 0.0085
2018-02-13 2017-12-31 13F SEI INVESTMENTS COMMON 784117103 467,108 160,669 52.43 33,567 78.09 0.0071
2017-11-09 2017-09-30 13F SEI INVESTMENTS COMMON 784117103 306,439 -8,904 -2.82 18,848 11.14 0.0042
2017-08-09 2017-06-30 13F SEI INVESTMENTS COMMON 784117103 315,343 -5,344 -1.67 16,959 4.84 0.0039
2017-05-10 2017-03-31 13F SEI INVESTMENTS COMMON 784117103 320,687 78,158 32.23 16,176 35.14 0.0037
2017-02-06 2016-12-31 13F SEI INVESTMENTS COMMON 784117103 242,529 -58,737 -19.50 11,970 -12.89 0.0029
2016-11-04 2016-09-30 13F SEI INVESTMENTS COMMON 784117103 301,266 -155,981 -34.11 13,741 -37.53 0.0034
2016-08-08 2016-06-30 13F SEI INVESTMENTS COMMON 784117103 457,247 -129,286 -22.04 21,997 -12.89 0.0055
2016-05-10 2016-03-31 13F SEI INVESTMENTS COMMON 784117103 586,533 241,599 70.04 25,251 39.69 0.0065
2016-02-12 2015-12-31 13F SEI INVESTMENTS COMMON 784117103 344,934 -16,510 -4.57 18,076 3.69 0.0045
2015-11-13 2015-09-30 13F SEI INVESTMENTS COMMON 784117103 361,444 -116,515 -24.38 17,432 -25.62 0.0047
2015-08-14 2015-06-30 13F SEI INVESTMENTS COMMON 784117103 477,959 30,287 6.77 23,435 18.74 0.0055
2015-05-15 2015-03-31 13F SEI INVESTMENTS COMMON 784117103 447,672 62,082 16.10 19,737 27.84 0.0045
2015-02-13 2014-12-31 13F SEI INVESTMENTS COMMON 784117103 385,590 -34,384 -8.19 15,439 1.67 0.0035
2014-12-08 2014-09-30 13F/A-1 SEI INVESTMENTS COMMON 784117103 419,974 -48,027 -10.26 15,186 -0.98 0.0036
2014-11-14 2014-09-30 13F SEI INVESTMENTS COMMON 784117103 419,974 15,186
2014-09-03 2014-06-30 13F/A-1 SEI INVESTMENTS COMMON 784117103 468,001 69,683 17.49 15,336 14.56 0.0039
2014-08-14 2014-06-30 13F SEI INVESTMENTS COMMON 784117103 468,001 15,336
2014-05-15 2014-03-31 13F SEI INVESTMENTS COMMON 784117103 398,318 7,803 2.00 13,387 -1.30 0.0037
2014-02-26 2013-12-31 13F/A-1 SEI INVESTMENTS COMMON 784117103 390,515 -30,993 -7.35 13,563 4.10 0.0038
2014-02-13 2013-12-31 13F SEI INVESTMENTS COMMON 784117103 390,515 13,563
2013-10-31 2013-09-30 13F SEI INVESTMENTS COMMON 784117103 421,508 9,273 2.25 13,029 11.16 0.0039
2013-08-13 2013-06-30 13F SEI INVESTMENTS COMMON 784117103 412,235 412,235 11,721 0.0037
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.