SEI 투자 회사
MX ˙ BMV ˙ US7841171033
SecurityMX:SEIC / SEI Investments Company
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership399,826 shares
Latest Disclosed Value $ 31,374,346
Renaissance Technologies Llc reports 0.65% increase in ownership of SEIC / SEI Investments Company

On May 14, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 399,826 shares of SEI Investments Company (MX:SEIC) valued at $31,374,346 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 397,226 shares of SEI Investments Company. This represents a change in shares of 0.65% 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)
2026-05-14 2026-03-31 13F SEI INVTS COM 784117103 399,826 2,600 0.65 31,374 -3.70 0.0491
2026-02-12 2025-12-31 13F SEI INVTS COM 784117103 397,226 10,300 2.66 32,580 -0.76 0.0505
2025-11-13 2025-09-30 13F SEI INVTS COM 784117103 386,926 -35,000 -8.30 32,831 -13.41 0.0433
2025-08-13 2025-06-30 13F SEI INVTS COM 784117103 421,926 224,100 113.28 37,914 146.88 0.0504
2025-05-14 2025-03-31 13F SEI INVTS COM 784117103 197,826 127,400 180.90 15,357 164.41 0.0232
2025-02-13 2024-12-31 13F SEI INVTS COM 784117103 70,426 -120,900 -63.19 5,809 -56.12 0.0086
2024-11-13 2024-09-30 13F SEI INVTS COM 784117103 191,326 -5,100 -2.60 13,238 4.18 0.0199
2024-08-09 2024-06-30 13F SEI INVTS COM 784117103 196,426 -78,100 -28.45 12,707 66,773.68 0.0216
2024-05-13 2024-03-31 13F SEI INVTS COM 784117103 274,526 49,400 21.94 20 35.71 0.0310
2024-02-13 2023-12-31 13F SEI INVTS COM 784117103 225,126 -13,800 -5.78 14 0.00 0.0221
2023-11-14 2023-09-30 13F SEI INVTS COM 784117103 238,926 -90,500 -27.47 14 -26.32 0.0245
2023-08-11 2023-06-30 13F SEI INVTS COM 784117103 329,426 50,800 18.23 20 18.75 0.0283
2023-05-12 2023-03-31 13F SEI INVTS COM 784117103 278,626 -92,900 -25.00 16 -23.81 0.0213
2023-02-13 2022-12-31 13F SEI INVTS COM 784117103 371,526 -31,600 -7.84 22 -99.89 0.0296
2022-11-14 2022-09-30 13F SEI INVTS COM 784117103 403,126 60,800 17.76 19,773 6.93 0.0280
2022-08-12 2022-06-30 13F SEI INVTS COM 784117103 342,326 318,626 1,344.41 18,492 1,195.87 0.0219
2022-05-13 2022-03-31 13F SEI INVTS COM 784117103 23,700 -86,526 -78.50 1,427 -78.76 0.0017
2022-02-11 2021-12-31 13F SEI INVTS COM 784117103 110,226 -66,300 -37.56 6,717 -35.83 0.0084
2021-11-12 2021-09-30 13F SEI INVTS COM 784117103 176,526 129,500 275.38 10,468 259.23 0.0135
2021-08-13 2021-06-30 13F SEI INVTS COM 784117103 47,026 -148,700 -75.97 2,914 -75.57 0.0036
2021-05-13 2021-03-31 13F SEI INVTS COM 784117103 195,726 50,400 34.68 11,926 42.79 0.0148
2021-02-10 2020-12-31 13F SEI INVTS COM 784117103 145,326 -177,600 -55.00 8,352 -49.01 0.0091
2020-11-13 2020-09-30 13F SEI INVTS COM 784117103 322,926 28,000 9.49 16,379 1.01 0.0164
2020-08-13 2020-06-30 13F SEI INVTS COM 784117103 294,926 -601,500 -67.10 16,215 -60.97 0.0140
2020-05-14 2020-03-31 13F SEI INVESTMENTS COM 784117103 896,426 41,026 4.80 41,540 -25.84 0.0403
2020-02-13 2019-12-31 13F SEI INVESTMENTS COM 784117103 855,400 -124,026 -12.66 56,012 -3.49 0.0430
2019-11-13 2019-09-30 13F SEI INVESTMENTS COM 784117103 979,426 -140,800 -12.57 58,036 -7.65 0.0491
2019-08-12 2019-06-30 13F SEI INVESTMENTS COM 784117103 1,120,226 149,900 15.45 62,845 23.95 0.0553
2019-05-14 2019-03-31 13F SEI INVESTMENTS COM 784117103 970,326 376,317 63.35 50,700 84.75 0.0461
2019-02-12 2018-12-31 13F SEI INVESTMENTS COM 784117103 594,009 385,083 184.32 27,443 114.99 0.0300
2018-11-13 2018-09-30 13F SEI INVESTMENTS COM 784117103 208,926 89,300 74.65 12,765 70.68 0.0131
2018-08-13 2018-06-30 13F/A-1 SEI INVESTMENTS COM 784117103 119,626 90,000 303.79 7,479 237.04 0.0082
2018-08-13 2018-06-30 13F SEI INVESTMENTS COM 784117103 29,626 2,219
2018-05-14 2018-03-31 13F SEI INVESTMENTS COM 784117103 29,626 -43,674 -59.58 2,219 -57.87 0.0024
2018-02-13 2017-12-31 13F SEI INVESTMENTS COM 784117103 73,300 -19,726 -21.20 5,267 -7.27 0.0058
2017-11-13 2017-09-30 13F SEI INVESTMENTS COM 784117103 93,026 16,400 21.40 5,680 37.83 0.0067
2017-08-11 2017-06-30 13F SEI INVESTMENTS COM 784117103 76,626 76,626 -17.63 4,121 -27.45 0.0053
2017-05-12 2017-03-31 13F SEI INVESTMENTS COM 784117103 0 -59,426 -100.00 0 -100.00
2017-02-13 2016-12-31 13F SEI INVESTMENTS COM 784117103 59,426 59,426 2,933 0.0046
2016-08-12 2016-06-30 13F SEI INVESTMENTS COM 784117103 0 -239,326 -100.00 0 -100.00
2016-05-13 2016-03-31 13F SEI INVESTMENTS COM 784117103 239,326 -160,874 -40.20 10,303 -50.87 0.0196
2016-02-11 2015-12-31 13F SEI INVESTMENTS COM 784117103 400,200 -210,100 -34.43 20,970 -28.76 0.0457
2015-11-12 2015-09-30 13F SEI INVESTMENTS COM 784117103 610,300 -292,900 -32.43 29,435 -33.53 0.0702
2015-08-14 2015-06-30 13F SEI INVESTMENTS COM 784117103 903,200 -265,526 -22.72 44,284 -14.06 0.1009
2015-05-13 2015-03-31 13F SEI INVESTMENTS COM 784117103 1,168,726 -527,000 -31.08 51,529 -24.11 0.1097
2015-02-13 2014-12-31 13F SEI INVESTMENTS COM 784117103 1,695,726 -116,000 -6.40 67,897 3.64 0.1639
2014-11-12 2014-09-30 13F SEI INVESTMENTS COM 784117103 1,811,726 14,400 0.80 65,512 11.23 0.1794
2014-08-13 2014-06-30 13F SEI INVESTMENTS COM 784117103 1,797,326 301,900 20.19 58,898 17.18 0.1373
2014-05-14 2014-03-31 13F SEI INVESTMENTS COM 784117103 1,495,426 331,626 28.50 50,261 24.35 0.1205
2014-02-14 2013-12-31 13F SEI INVESTMENTS COM 784117103 1,163,800 74,074 6.80 40,419 20.00 0.0968
2013-11-13 2013-09-30 13F SEI INVESTMENTS COM 784117103 1,089,726 239,800 28.21 33,683 39.40 0.0817
2013-08-12 2013-06-30 13F SEI INVESTMENTS COM 784117103 849,926 849,926 24,163 0.0634
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.