SEI 투자 회사
MX ˙ BMV ˙ US7841171033
SecurityMX:SEIC / SEI Investments Company
InstitutionRoyce & Associates Lp
ManagerChuck Royce
Latest Disclosed Ownership996,456 shares
Latest Disclosed Value $ 78,191,902
Royce & Associates Lp reports 9.94% increase in ownership of SEIC / SEI Investments Company

On May 12, 2026 - Royce & Associates Lp filed a 13F-HR form disclosing ownership of 996,456 shares of SEI Investments Company (MX:SEIC) valued at $78,191,902 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 906,339 shares of SEI Investments Company. This represents a change in shares of 9.94% 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)
2026-05-12 2026-03-31 13F SEI INVTS COM 784117103 996,456 90,117 9.94 78,192 5.18 0.7718
2026-02-09 2025-12-31 13F SEI INVTS COM 784117103 906,339 2,756 0.31 74,338 -3.04 0.7538
2025-11-12 2025-09-30 13F SEI INVTS COM 784117103 903,583 -323,169 -26.34 76,669 -30.45 0.7644
2025-08-11 2025-06-30 13F SEI INVTS COM 784117103 1,226,752 -53,440 -4.17 110,236 10.92 1.1313
2025-05-06 2025-03-31 13F SEI INVTS COM 784117103 1,280,192 -77,047 -5.68 99,381 -11.22 1.0772
2025-02-10 2024-12-31 13F SEI INVTS COM 784117103 1,357,239 -108,167 -7.38 111,945 10.41 1.0386
2024-11-06 2024-09-30 13F SEI INVTS COM 784117103 1,465,406 1,828 0.12 101,391 7.09 0.9217
2024-08-13 2024-06-30 13F SEI INVTS COM 784117103 1,463,578 -807 -0.06 94,679 -10.08 0.8850
2024-05-13 2024-03-31 13F SEI INVTS COM 784117103 1,464,385 1,816 0.12 105,289 13.28 0.9397
2024-02-12 2023-12-31 13F SEI INVTS COM 784117103 1,462,569 34,272 2.40 92,946 8.04 0.8584
2023-11-09 2023-09-30 13F SEI INVTS COM 784117103 1,428,297 -35,060 -2.40 86,026 -1.40 0.8760
2023-08-07 2023-06-30 13F SEI INVTS COM 784117103 1,463,357 10,909 0.75 87,245 4.38 0.8470
2023-05-23 2023-03-31 13F/A-1 SEI INVTS COM 784117103 1,452,448 -341 -0.02 83,588 -1.31 0.8367
2023-05-04 2023-03-31 13F SEI INVTS COM 784117103 1,452,448 -341 84 0.8366
2023-05-23 2022-12-31 13F/A-1 SEI INVTS COM 784117103 1,452,789 -1,281 -0.09 84,698 18.75 0.8901
2023-02-13 2022-12-31 13F SEI INVTS COM 784117103 1,452,789 -1,281 85 0.8852
2022-11-03 2022-09-30 13F SEI INVTS COM 784117103 1,454,070 6,105 0.42 71,322 -8.82 0.8065
2022-08-04 2022-06-30 13F SEI INVTS COM 784117103 1,447,965 60,371 4.35 78,219 -6.38 0.8053
2022-05-05 2022-03-31 13F SEI INVTS COM 784117103 1,387,594 8,286 0.60 83,547 -0.60 0.7095
2022-02-07 2021-12-31 13F SEI INVTS COM 784117103 1,379,308 -22,061 -1.57 84,055 1.15 0.6281
2021-11-10 2021-09-30 13F SEI INVTS COM 784117103 1,401,369 93,514 7.15 83,101 2.53 0.6215
2021-08-06 2021-06-30 13F SEI INVTS COM 784117103 1,307,855 47,517 3.77 81,048 5.54 0.5570
2021-05-10 2021-03-31 13F SEI INVTS COM 784117103 1,260,338 818,919 185.52 76,792 202.71 0.5162
2021-02-08 2020-12-31 13F SEI INVTS COM 784117103 441,419 -15,850 -3.47 25,368 9.38 0.2096
2020-11-12 2020-09-30 13F SEI INVTS COM 784117103 457,269 0 0.00 23,193 -7.75 0.2503
2020-08-07 2020-06-30 13F SEI INVTS COM 784117103 457,269 15,500 3.51 25,141 22.81 0.2769
2020-05-12 2020-03-31 13F SEI INVESTMENTS COM 784117103 441,769 69,400 18.64 20,472 -16.04 0.2790
2020-02-06 2019-12-31 13F SEI INVESTMENTS COM 784117103 372,369 -42,257 -10.19 24,383 -0.76 0.2178
2019-11-13 2019-09-30 13F SEI INVESTMENTS COM 784117103 414,626 -6,700 -1.59 24,569 3.95 0.2274
2019-08-12 2019-06-30 13F SEI INVESTMENTS COM 784117103 421,326 6,400 1.54 23,636 9.02 0.2136
2019-05-09 2019-03-31 13F SEI INVESTMENTS COM 784117103 414,926 -17,450 -4.04 21,680 8.53 0.1832
2019-02-11 2018-12-31 13F SEI INVESTMENTS COM 784117103 432,376 19,776 4.79 19,976 -20.76 0.1791
2018-11-13 2018-09-30 13F SEI INVESTMENTS COM 784117103 412,600 0 0.00 25,210 -2.27 0.1739
2018-08-09 2018-06-30 13F SEI INVESTMENTS COM 784117103 412,600 -83,100 -16.76 25,796 -30.53 0.1785
2018-05-14 2018-03-31 13F SEI INVESTMENTS COM 784117103 495,700 -66,339 -11.80 37,133 -8.06 0.2600
2018-02-09 2017-12-31 13F SEI INVESTMENTS COM 784117103 562,039 -49,032 -8.02 40,388 8.24 0.2688
2017-11-13 2017-09-30 13F SEI INVESTMENTS COM 784117103 611,071 -43,379 -6.63 37,312 6.01 0.2473
2017-08-07 2017-06-30 13F SEI INVESTMENTS COM 784117103 654,450 -21,000 -3.11 35,196 3.30 0.2333
2017-05-11 2017-03-31 13F SEI INVESTMENTS COM 784117103 675,450 22,700 3.48 34,070 5.74 0.2228
2017-02-10 2016-12-31 13F SEI INVESTMENTS COM 784117103 652,750 0 0.00 32,220 8.22 0.2067
2016-11-14 2016-09-30 13F SEI INVESTMENTS COM 784117103 652,750 -8,700 -1.32 29,772 -6.44 0.1960
2016-08-08 2016-06-30 13F SEI INVESTMENTS COM 784117103 661,450 42,600 6.88 31,822 19.45 0.2103
2016-05-11 2016-03-31 13F SEI INVESTMENTS COM 784117103 618,850 -555,490 -47.30 26,641 -56.71 0.1681
2016-02-09 2015-12-31 13F SEI INVESTMENTS COM 784117103 1,174,340 -288,440 -19.72 61,535 -12.78 0.3673
2015-11-12 2015-09-30 13F SEI INVESTMENTS COM 784117103 1,462,780 -457,000 -23.80 70,550 -25.05 0.3741
2015-08-10 2015-06-30 13F SEI INVESTMENTS COM 784117103 1,919,780 -291,455 -13.18 94,127 -3.45 0.3977
2015-05-13 2015-03-31 13F SEI INVESTMENTS COM 784117103 2,211,235 -196,862 -8.18 97,493 1.11 0.3688
2015-02-09 2014-12-31 13F SEI INVESTMENTS COM 784117103 2,408,097 -852,620 -26.15 96,420 -18.22 0.3346
2014-11-12 2014-09-30 13F SEI INVESTMENTS COM 784117103 3,260,717 7,570 0.23 117,908 10.60 0.3983
2014-08-11 2014-06-30 13F SEI INVESTMENTS COM 784117103 3,253,147 83,675 2.64 106,606 0.08 0.3173
2014-05-12 2014-03-31 13F SEI INVESTMENTS COM 784117103 3,169,472 -320,276 -9.18 106,526 -12.11 0.3147
2014-02-10 2013-12-31 13F SEI INVESTMENTS COM 784117103 3,489,748 -406,900 -10.44 121,199 0.63 0.3473
2013-11-12 2013-09-30 13F SEI INVESTMENTS COM 784117103 3,896,648 -299,948 -7.15 120,445 0.95 0.3582
2013-08-07 2013-06-30 13F SEI INVESTMENTS COM 784117103 4,196,596 4,196,596 119,309 0.3686
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.