SEI Investments Company
MX ˙ BMV ˙ US7841171033
SecurityMX:SEIC / SEI Investments Company
InstitutionBridgewater Associates, LP
ManagerRay Dalio, Bob Prince
Latest Disclosed Ownership232,675 shares
Latest Disclosed Value $ 18,258,007
Bridgewater Associates, LP reports 32.73% decrease in ownership of SEIC / SEI Investments Company

On May 15, 2026 - Bridgewater Associates, LP filed a 13F-HR form disclosing ownership of 232,675 shares of SEI Investments Company (MX:SEIC) valued at $18,258,007 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 345,877 shares of SEI Investments Company. This represents a change in shares of -32.73% 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)
2026-05-15 2026-03-31 13F SEI INVTS COM 784117103 232,675 -113,202 -32.73 18,258 -35.64 0.0815
2026-02-13 2025-12-31 13F SEI INVTS COM 784117103 345,877 83,375 31.76 28,369 27.36 0.1035
2025-11-13 2025-09-30 13F SEI INVTS COM 784117103 262,502 132,915 102.57 22,273 91.28 0.0873
2025-08-13 2025-06-30 13F SEI INVTS COM 784117103 129,587 -16,993 -11.59 11,645 2.33 0.0470
2025-05-14 2025-03-31 13F SEI INVTS COM 784117103 146,580 103,660 241.52 11,379 221.44 0.0528
2025-02-13 2024-12-31 13F SEI INVTS COM 784117103 42,920 -10,166 -19.15 3,540 -3.62 0.0162
2024-11-13 2024-09-30 13F SEI INVTS COM 784117103 53,086 23,604 80.06 3,673 92.61 0.0208
2024-08-14 2024-06-30 13F SEI INVTS COM 784117103 29,482 -59,913 -67.02 1,907 -70.33 0.0100
2024-05-14 2024-03-31 13F SEI INVTS COM 784117103 89,395 -43,441 -32.70 6,428 -23.86 0.0325
2024-02-14 2023-12-31 13F SEI INVTS COM 784117103 132,836 -66,215 -33.27 8,442 -29.59 0.0473
2023-11-13 2023-09-30 13F SEI INVTS COM 784117103 199,051 167,622 533.34 11,989 540.04 0.0725
2023-08-11 2023-06-30 13F SEI INVTS COM 784117103 31,429 -26,410 -45.66 1,874 -43.72 0.0116
2023-05-12 2023-03-31 13F SEI INVTS COM 784117103 57,839 -21,897 -27.46 3,329 -28.40 0.0203
2023-02-13 2022-12-31 13F SEI INVTS COM 784117103 79,736 -11,501 -12.61 4,649 3.87 0.0254
2022-11-10 2022-09-30 13F SEI INVTS COM 784117103 91,237 -5,920 -6.09 4,475 -14.73 0.0227
2022-08-11 2022-06-30 13F SEI INVTS COM 784117103 97,157 75,460 347.79 5,248 301.84 0.0222
2022-05-13 2022-03-31 13F SEI INVTS COM 784117103 21,697 -5,448 -20.07 1,306 -21.04 0.0053
2022-02-14 2021-12-31 13F SEI INVTS COM 784117103 27,145 -31,237 -53.50 1,654 -52.22 0.0096
2021-11-12 2021-09-30 13F SEI INVTS COM 784117103 58,382 -1,382 -2.31 3,462 -6.53 0.0190
2021-08-13 2021-06-30 13F SEI INVTS COM 784117103 59,764 4,409 7.96 3,704 9.81 0.0238
2021-05-14 2021-03-31 13F SEI INVTS COM 784117103 55,355 36,745 197.45 3,373 215.23 0.0297
2021-02-12 2020-12-31 13F SEI INVTS COM 784117103 18,610 18,610 1,070 0.0093
2020-05-14 2020-03-31 13F SEI INVESTMENTS COM 784117103 0 -31,026 -100.00 0 -100.00
2020-02-13 2019-12-31 13F SEI INVESTMENTS COM 784117103 31,026 31,026 2,032 0.0207
2019-05-14 2019-03-31 13F SEI INVESTMENTS COM 784117103 0 -56,169 -100.00 0 -100.00
2019-02-13 2018-12-31 13F SEI INVESTMENTS COM 784117103 56,169 50,653 918.29 2,595 670.03 0.0237
2018-11-13 2018-09-30 13F SEI INVESTMENTS COM 784117103 5,516 -477 -7.96 337 -10.13 0.0035
2018-08-13 2018-06-30 13F SEI INVESTMENTS COM 784117103 5,993 5,993 375 0.0037
2016-11-09 2016-09-30 13F SEI INVESTMENTS COM 784117103 0 -25,000 -100.00 0 -100.00
2016-08-10 2016-06-30 13F SEI INVESTMENTS COM 784117103 25,000 25,000 0.00 1,203 0.0151
2016-02-11 2015-12-31 13F SEI INVESTMENTS COM 784117103 0 -18,196 -100.00 0 -100.00
2015-11-12 2015-09-30 13F SEI INVESTMENTS COM 784117103 18,196 18,196 878 0.0118
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.