SEI Investments Company
MX ˙ BMV ˙ US7841171033
SecurityMX:SEIC / SEI Investments Company
InstitutionLPL Financial LLC
Latest Disclosed Ownership166,815 shares
Latest Disclosed Value $ 13,089,907
LPL Financial LLC reports 12.62% increase in ownership of SEIC / SEI Investments Company

On May 6, 2026 - LPL Financial LLC filed a 13F-HR form disclosing ownership of 166,815 shares of SEI Investments Company (MX:SEIC) valued at $13,089,907 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 148,123 shares of SEI Investments Company. This represents a change in shares of 12.62% 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)
2026-05-06 2026-03-31 13F SEI INVTS COM 784117103 166,815 18,692 12.62 13,090 7.74 0.0035
2026-02-11 2025-12-31 13F SEI INVTS COM 784117103 148,123 35,568 31.60 12,149 27.21 0.0033
2025-11-12 2025-09-30 13F SEI INVTS COM 784117103 112,555 13,500 13.63 9,550 7.29 0.0028
2025-08-12 2025-06-30 13F SEI INVTS COM 784117103 99,055 5,600 5.99 8,901 22.70 0.0030
2025-05-07 2025-03-31 13F SEI INVTS COM 784117103 93,455 5,291 6.00 7,255 -0.23 0.0028
2025-02-11 2024-12-31 13F SEI INVTS COM 784117103 88,164 9,607 12.23 7,272 33.78 0.0030
2024-11-08 2024-09-30 13F SEI INVTS COM 784117103 78,557 3,491 4.65 5,435 11.92 0.0024
2024-08-07 2024-06-30 13F SEI INVTS COM 784117103 75,066 9,189 13.95 4,856 2.53 0.0024
2024-05-10 2024-03-31 13F SEI INVTS COM 784117103 65,877 -5,674 -7.93 4,737 4.16 0.0025
2024-02-14 2023-12-31 13F SEI INVTS COM 784117103 71,551 9,375 15.08 4,547 21.45 0.0028
2023-11-13 2023-09-30 13F SEI INVTS COM 784117103 62,176 14,722 31.02 3,745 32.34 0.0026
2023-07-31 2023-06-30 13F SEI INVTS COM 784117103 47,454 3,890 8.93 2,829 12.84 0.0020
2023-05-10 2023-03-31 13F SEI INVTS COM 784117103 43,564 -2,049 -4.49 2,507 -5.72 0.0020
2023-02-07 2022-12-31 13F SEI INVTS COM 784117103 45,613 -134 -0.29 2,659 18.49 0.0023
2022-11-14 2022-09-30 13F SEI INVTS COM 784117103 45,747 -1,233 -2.62 2,244 -11.58 0.0022
2022-08-12 2022-06-30 13F SEI INVTS COM 784117103 46,980 -4,803 -9.28 2,538 -18.60 0.0024
2022-05-16 2022-03-31 13F SEI INVTS COM 784117103 51,783 -287 -0.55 3,118 -1.73 0.0027
2022-02-14 2021-12-31 13F SEI INVTS COM 784117103 52,070 1,698 3.37 3,173 6.23 0.0027
2021-11-15 2021-09-30 13F SEI INVTS COM 784117103 50,372 6,000 13.52 2,987 8.62 0.0028
2021-08-13 2021-06-30 13F SEI INVTS COM 784117103 44,372 -15,300 -25.64 2,750 -24.37 0.0028
2021-05-14 2021-03-31 13F SEI INVTS COM 784117103 59,672 -4,653 -7.23 3,636 -1.65 0.0042
2021-02-12 2020-12-31 13F SEI INVTS COM 784117103 64,325 4,741 7.96 3,697 22.34 0.0048
2020-11-09 2020-09-30 13F SEI INVTS COM 784117103 59,584 22 0.04 3,022 -7.73 0.0047
2020-08-13 2020-06-30 13F SEI INVTS COM 784117103 59,562 4,114 7.42 3,275 27.48 0.0057
2020-05-14 2020-03-31 13F SEI INVESTMENTS COM 784117103 55,448 -263 -0.47 2,569 -29.58 0.0055
2020-02-14 2019-12-31 13F SEI INVESTMENTS COM 784117103 55,711 4,957 9.77 3,648 21.32 0.0066
2019-11-13 2019-09-30 13F SEI INVESTMENTS COM 784117103 50,754 -2,054 -3.89 3,007 1.48 0.0061
2019-08-09 2019-06-30 13F SEI INVESTMENTS COM 784117103 52,808 803 1.54 2,963 9.05 0.0063
2019-05-08 2019-03-31 13F SEI INVESTMENTS COM 784117103 52,005 9,627 22.72 2,717 38.76 0.0062
2019-02-07 2018-12-31 13F SEI INVESTMENTS COM 784117103 42,378 1,682 4.13 1,958 -21.27 0.0052
2018-11-14 2018-09-30 13F SEI INVESTMENTS COM 784117103 40,696 815 2.04 2,487 -0.24 0.0060
2018-08-14 2018-06-30 13F SEI INVESTMENTS COM 784117103 39,881 -4,964 -11.07 2,493 -25.78 0.0065
2018-05-15 2018-03-31 13F SEI INVESTMENTS COM 784117103 44,845 17,221 62.34 3,359 69.22 0.0092
2018-02-14 2017-12-31 13F SEI INVESTMENTS COM 784117103 27,624 2,916 11.80 1,985 31.54 0.0060
2017-11-14 2017-09-30 13F SEI INVESTMENTS COM 784117103 24,708 11,521 87.37 1,509 112.83 0.0053
2017-08-14 2017-06-30 13F SEI INVESTMENTS COM 784117103 13,187 -15,796 -54.50 709 -50.93 0.0027
2017-05-15 2017-03-31 13F SEI INVESTMENTS COM 784117103 28,983 444 1.56 1,445 0.77 0.0098
2017-02-13 2016-12-31 13F SEI INVESTMENTS COM 784117103 28,539 -1,930 -6.33 1,434 5.52 0.0109
2016-11-16 2016-09-30 13F SEI INVESTMENTS COM 784117103 30,469 13,465 79.19 1,359 66.54 0.0129
2016-08-15 2016-06-30 13F SEI INVESTMENTS COM 784117103 17,004 -17,776 -51.11 816 -44.75 0.0069
2016-05-16 2016-03-31 13F SEI INVESTMENTS COM 784117103 34,780 -940 -2.63 1,477 -19.77 0.0041
2016-02-12 2015-12-31 13F SEI INVESTMENTS COM 784117103 35,720 35,720 0.00 1,841 0.0051
2015-11-13 2015-09-30 13F SEI INVESTMENTS COM 784117103 0 -21,343 -100.00 0 -100.00
2015-08-14 2015-06-30 13F SEI INVESTMENTS COM 784117103 21,343 1,286 6.41 1,049 18.53 0.0053
2015-05-14 2015-03-31 13F SEI INVESTMENTS COM 784117103 20,057 2,895 16.87 885 28.82 0.0045
2015-02-13 2014-12-31 13F SEI INVESTMENTS COM 784117103 17,162 17,162 687 0.0038
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.