SEI投資公司
MX ˙ BMV ˙ US7841171033
SecurityMX:SEIC / SEI Investments Company
InstitutionJlb & Associates Inc
Latest Disclosed Ownership259,183 shares
Latest Disclosed Value $ 20,338,090
Jlb & Associates Inc reports 0.39% decrease in ownership of SEIC / SEI Investments Company

On May 4, 2026 - Jlb & Associates Inc filed a 13F-HR form disclosing ownership of 259,183 shares of SEI Investments Company (MX:SEIC) valued at $20,338,090 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 260,197 shares of SEI Investments Company. This represents a change in shares of -0.39% 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)
2026-05-04 2026-03-31 13F SEI INVESTMENTS COM 784117103 259,183 -1,014 -0.39 20,338 -4.70 2.9203
2026-02-03 2025-12-31 13F S E I INVESTMENTS COM 784117103 260,197 -6,347 -2.38 21,341 -5.64 2.8791
2025-10-30 2025-09-30 13F S E I INVESTMENTS COM 784117103 266,544 -1,717 -0.64 22,616 -6.18 2.9743
2025-07-17 2025-06-30 13F S E I INVESTMENTS COM 784117103 268,261 -8,343 -3.02 24,106 12.26 3.3615
2025-04-17 2025-03-31 13F S E I INVESTMENTS COM 784117103 276,604 -4,582 -1.63 21,473 -7.42 2.9945
2025-02-03 2024-12-31 13F S E I INVESTMENTS COM 784117103 281,186 -7,338 -2.54 23,192 16.18 3.1485
2024-10-02 2024-09-30 13F S E I INVESTMENTS COM 784117103 288,524 2,722 0.95 19,963 7.97 2.5687
2024-07-18 2024-06-30 13F S E I INVESTMENTS COM 784117103 285,802 -641 -0.22 18,489 -10.23 2.4961
2024-04-30 2024-03-31 13F S E I INVESTMENTS COM 784117103 286,443 -2,707 -0.94 20,595 12.08 2.7389
2024-01-22 2023-12-31 13F S E I INVESTMENTS COM 784117103 289,150 1,834 0.64 18,375 6.18 2.6409
2023-11-01 2023-09-30 13F S E I INVESTMENTS COM 784117103 287,316 -14,200 -4.71 17,305 -3.73 2.7131
2023-07-20 2023-06-30 13F S E I INVESTMENTS COM 784117103 301,516 6,002 2.03 17,976 5.70 2.5608
2023-04-25 2023-03-31 13F S E I INVESTMENTS COM 784117103 295,514 9,671 3.38 17,007 106,187.50 2.5591
2023-01-26 2022-12-31 13F S E I INVESTMENTS COM 784117103 285,843 -7,943 -2.70 17 -99.89 2.6554
2022-10-19 2022-09-30 13F S E I INVESTMENTS COM 784117103 293,786 1,816 0.62 14,410 -8.64 2.5561
2022-07-19 2022-06-30 13F/A-1 S E I INVESTMENTS COM 784117103 291,970 -934 -0.32 15,772 -10.56 2.6873
2022-07-19 2022-06-30 13F S E I INVESTMENTS COM 784117103 291,970 -934 15,772 2.6873
2022-04-08 2022-03-31 13F S E I INVESTMENTS COM 784117103 292,904 2,686 0.93 17,635 -0.28 2.6365
2022-01-26 2021-12-31 13F S E I INVESTMENTS COM 784117103 290,218 3,498 1.22 17,685 4.02 2.5094
2021-11-10 2021-09-30 13F S E I INVESTMENTS COM 784117103 286,720 -2,079 -0.72 17,002 -5.00 2.6994
2021-07-29 2021-06-30 13F S E I INVESTMENTS COM 784117103 288,799 1,475 0.51 17,896 2.23 2.7876
2021-05-13 2021-03-31 13F S E I INVESTMENTS COM 784117103 287,324 1,381 0.48 17,506 6.53 2.8798
2021-01-28 2020-12-31 13F S E I INVESTMENTS COM 784117103 285,943 18,354 6.86 16,433 21.08 2.7267
2020-10-16 2020-09-30 13F S E I INVESTMENTS COM 784117103 267,589 19,591 7.90 13,572 -0.45 2.4954
2020-07-13 2020-06-30 13F S E I INVESTMENTS COM 784117103 247,998 3,957 1.62 13,634 20.57 2.7218
2020-05-19 2020-03-31 13F S E I INVESTMENTS COM 784117103 244,041 -4,993 -2.00 11,308 -30.65 2.6824
2020-02-10 2019-12-31 13F S E I INVESTMENTS COM 784117103 249,034 -1,339 -0.53 16,306 9.92 2.9958
2019-10-29 2019-09-30 13F S E I INVESTMENTS COM 784117103 250,373 4,527 1.84 14,835 7.57 2.9388
2019-08-05 2019-06-30 13F S E I INVESTMENTS COM 784117103 245,846 5,962 2.49 13,791 10.04 2.7887
2019-04-30 2019-03-31 13F S E I INVESTMENTS COM 784117103 239,884 16,186 7.24 12,533 21.28 2.6431
2019-01-11 2018-12-31 13F S E I INVESTMENTS COM 784117103 223,698 2,089 0.94 10,334 -23.68 2.5188
2018-10-10 2018-09-30 13F S E I INVESTMENTS COM 784117103 221,609 -8,955 -3.88 13,540 -6.06 2.8994
2018-07-09 2018-06-30 13F S E I INVESTMENTS COM 784117103 230,564 11,936 5.46 14,414 -11.99 3.0682
2018-04-23 2018-03-31 13F S E I INVESTMENTS COM 784117103 218,628 2,967 1.38 16,377 5.68 3.5247
2018-01-24 2017-12-31 13F S E I INVESTMENTS COM 784117103 215,661 1,934 0.90 15,497 18.75 3.3689
2017-10-12 2017-09-30 13F S E I INVESTMENTS COM 784117103 213,727 -2,547 -1.18 13,050 12.20 3.1872
2017-07-31 2017-06-30 13F S E I INVESTMENTS COM 784117103 216,274 15,787 7.87 11,631 17.53 2.9521
2017-01-18 2016-12-31 13F S E I INVESTMENTS COM 784117103 200,487 1,165 0.58 9,896 8.85 2.6762
2016-10-26 2016-09-30 13F S E I INVESTMENTS COM 784117103 199,322 2,416 1.23 9,091 -4.03 2.5061
2016-07-21 2016-06-30 13F S E I INVESTMENTS COM 784117103 196,906 2,866 1.48 9,473 13.41 2.6845
2016-04-08 2016-03-31 13F S E I INVESTMENTS COM 784117103 194,040 3,813 2.00 8,353 -16.19 2.4448
2016-02-01 2015-12-31 13F S E I INVESTMENTS COM 784117103 190,227 -1,379 -0.72 9,967 7.86 3.0793
2015-10-19 2015-09-30 13F S E I INVESTMENTS COM 784117103 191,606 -1,811 -0.94 9,241 -2.55 2.9793
2015-07-21 2015-06-30 13F S E I INVESTMENTS COM 784117103 193,417 3,260 1.71 9,483 13.11 2.9372
2015-04-09 2015-03-31 13F S E I INVESTMENTS COM 784117103 190,157 190,157 0.00 8,384 2.6209
2015-01-28 2014-12-31 13F S E I INVESTMENTS COM 784117103 0 -185,253 -100.00 0 -100.00
2014-10-07 2014-09-30 13F S E I INVESTMENTS COM 784117103 185,253 1,800 0.98 6,698 11.43 2.4012
2014-07-11 2014-06-30 13F S E I INVESTMENTS COM 784117103 183,453 23,531 14.71 6,011 11.85 2.1825
2014-04-04 2014-03-31 13F S E I INVESTMENTS COM 784117103 159,922 423 0.27 5,374 -2.98 2.0029
2014-01-17 2013-12-31 13F S E I INVESTMENTS COM 784117103 159,499 -1,725 -1.07 5,539 11.16 2.1094
2013-10-07 2013-09-30 13F S E I INVESTMENTS COM 784117103 161,224 -2,720 -1.66 4,983 6.93 2.1009
2013-08-12 2013-06-30 13F S E I INVESTMENTS COM 784117103 163,944 163,944 4,660 2.1254
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.