SEI Investments Company
MX ˙ BMV ˙ US7841171033
SecurityMX:SEIC / SEI Investments Company
InstitutionLegacy Financial Advisors, Inc.
Latest Disclosed Ownership4,512 shares
Latest Disclosed Value $ 354,084
Legacy Financial Advisors, Inc. reports 1.76% increase in ownership of SEIC / SEI Investments Company

On April 30, 2026 - Legacy Financial Advisors, Inc. filed a 13F-HR form disclosing ownership of 4,512 shares of SEI Investments Company (MX:SEIC) valued at $354,084 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 4,434 shares of SEI Investments Company. This represents a change in shares of 1.76% 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)
2026-04-30 2026-03-31 13F SEI INVESTMENTS Stock 784117103 4,512 78 1.76 354 -2.48 0.0495
2026-02-04 2025-12-31 13F SEI INVESTMENTS Stock 784117103 4,434 -112 -2.46 364 -5.71 0.0503
2025-11-10 2025-09-30 13F SEI INVESTMENTS Stock 784117103 4,546 -58 -1.26 386 -6.78 0.0531
2025-08-07 2025-06-30 13F SEI INVESTMENTS Stock 784117103 4,604 -45 -0.97 414 14.72 0.0646
2025-05-14 2025-03-31 13F SEI INVESTMENTS Stock 784117103 4,649 -3 -0.06 361 -6.01 0.0603
2025-02-13 2024-12-31 13F SEI INVESTMENTS Stock 784117103 4,652 93 2.04 384 21.59 0.0634
2024-11-14 2024-09-30 13F SEI INVESTMENTS Stock 784117103 4,559 17 0.37 315 7.51 0.0530
2024-08-13 2024-06-30 13F SEI INVESTMENTS Stock 784117103 4,542 352 8.40 294 -2.66 0.0523
2024-05-14 2024-03-31 13F SEI INVESTMENTS Stock 784117103 4,190 312 8.05 301 22.36 0.0540
2024-02-13 2023-12-31 13F/A-1 SEI INVESTMENTS Stock 784117103 3,878 391 11.21 246 17.14 0.0473
2024-02-06 2023-12-31 13F SEI INVESTMENTS Stock 784117103 3,878 391 246 0.0475
2023-11-13 2023-09-30 13F SEI INVESTMENTS Stock 784117103 3,487 3,487 210 0.0420
2019-08-07 2019-06-30 13F SEI INVESTMENTS Stock 784117103 0 -293 -100.00 0 -100.00
2019-05-14 2019-03-31 13F SEI INVESTMENTS Stock 784117103 293 0 0.00 15 7.14 0.0051
2019-01-16 2018-12-31 13F SEI INVESTMENTS Stock 784117103 293 204 229.21 14 180.00 0.0054
2018-10-30 2018-09-30 13F SEI INVESTMENTS Stock 784117103 89 0 0.00 5 -16.67 0.0018
2018-07-17 2018-06-30 13F SEI INVESTMENTS Stock 784117103 89 0 0.00 6 0.00 0.0023
2018-04-12 2018-03-31 13F SEI INVESTMENTS Stock 784117103 89 0 0.00 6 0.00 0.0024
2018-02-09 2017-12-31 13F SEI INVESTMENTS CO COM Stock 784117103 89 89 6 0.0025
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.