SEI Investments Company
DE ˙ DB ˙ US7841171033
73,00 € 0,00 (0,00%)
2026-06-04
CENA AKCJI
SecurityDE:SI3 / SEI Investments Company
InstitutionBrown Advisory Inc
Latest Disclosed Ownership12,490 shares
Latest Disclosed Value $ 980,083
Brown Advisory Inc reports 2.52% increase in ownership of SI3 / SEI Investments Company

On May 15, 2026 - Brown Advisory Inc filed a 13F-HR form disclosing ownership of 12,490 shares of SEI Investments Company (DE:SI3) valued at $824,340 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 12,183 shares of SEI Investments Company. This represents a change in shares of 2.52% during the quarter. The current value of the position is $911,770 USD.

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.

Upgrade to unlock premium data and export to Excel .

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 12,490 307 2.52 980 -1.90 0.0007
2026-02-13 2025-12-31 13F SEI INVTS COM 784117103 12,183 -267 -2.14 999 -5.40 0.0014
2025-11-14 2025-09-30 13F SEI INVTS COM 784117103 12,450 -279 -2.19 1,056 -7.61 0.0014
2025-08-13 2025-06-30 13F SEI INVTS COM 784117103 12,729 -2,210 -14.79 1,144 -1.38 0.0015
2025-04-30 2025-03-31 13F SEI INVTS COM 784117103 14,939 -553,088 -97.37 1,160 -97.53 0.0017
2025-02-14 2024-12-31 13F SEI INVTS COM 784117103 568,027 -237,728 -29.50 46,851 -15.96 0.0594
2024-11-13 2024-09-30 13F SEI INVTS COM 784117103 805,755 -35,199 -4.19 55,750 2.48 0.0700
2024-08-14 2024-06-30 13F SEI INVTS COM 784117103 840,954 142,228 20.36 54,401 8.29 0.0711
2024-04-24 2024-03-31 13F SEI INVTS COM 784117103 698,726 6,389 0.92 50,238 14.18 0.0672
2024-02-08 2023-12-31 13F SEI INVTS COM 784117103 692,337 10,700 1.57 43,998 7.17 0.0618
2023-10-25 2023-09-30 13F SEI INVTS COM 784117103 681,637 17,740 2.67 41,055 3.72 0.0674
2023-07-31 2023-06-30 13F SEI INVTS COM 784117103 663,897 15,054 2.32 39,582 6.00 0.0618
2023-05-08 2023-03-31 13F SEI INVTS COM 784117103 648,843 47,648 7.93 37,341 6.54 0.0632
2023-02-13 2022-12-31 13F SEI INVTS COM 784117103 601,195 98,790 19.66 35,050 42.23 0.0651
2022-11-14 2022-09-30 13F SEI INVTS COM 784117103 502,405 37,975 8.18 24,643 -1.77 0.0479
2022-11-14 2022-06-30 13F/A-2 SEI INVTS COM 784117103 464,430 30,570 7.05 25,088 -3.96 0.0472
2022-09-13 2022-06-30 13F/A-1 SEI INVTS COM 784117103 927,360 61,140 50,095 0.0866
2022-08-02 2022-06-30 13F SEI INVTS COM 784117103 616,820 0 37,579 0.0604
2022-11-14 2022-03-31 13F/A-2 SEI INVTS COM 784117103 433,860 -182,960 -29.66 26,122 -30.51 0.0389
2022-09-13 2022-03-31 13F/A-1 SEI INVTS COM 784117103 866,220 249,400 52,154 0.0732
2022-05-09 2022-03-31 13F SEI INVTS COM 784117103 616,820 0 37,588 0.0511
2022-01-27 2021-12-31 13F SEI INVTS COM 784117103 616,820 351,420 132.41 37,589 138.84 0.0466
2021-11-12 2021-09-30 13F SEI INVTS COM 784117103 265,400 107,170 67.73 15,738 60.51 0.0232
2021-07-29 2021-06-30 13F SEI INVTS COM 784117103 158,230 90,390 133.24 9,805 137.24 0.0148
2021-05-14 2021-03-31 13F SEI INVTS COM 784117103 67,840 45,505 203.74 4,133 222.14 0.0071
2021-02-12 2020-12-31 13F SEI INVTS COM 784117103 22,335 12,863 135.80 1,283 166.74 0.0023
2020-11-16 2020-09-30 13F SEI INVTS COM 784117103 9,472 -739 -7.24 481 -14.41 0.0010
2020-08-14 2020-06-30 13F SEI INVTS COM 784117103 10,211 -3,503 -25.54 562 -11.50 0.0013
2020-05-15 2020-03-31 13F SEI INVESTMENTS COM 784117103 13,714 -86 -0.62 635 -29.68 0.0019
2020-02-14 2019-12-31 13F SEI INVESTMENTS COM 784117103 13,800 0 0.00 903 10.53 0.0023
2019-11-14 2019-09-30 13F SEI INVESTMENTS COM 784117103 13,800 -78 -0.56 817 5.01 0.0023
2019-08-12 2019-06-30 13F SEI INVESTMENTS COM 784117103 13,878 -35,483 -71.88 778 -69.83 0.0022
2019-05-15 2019-03-31 13F SEI INVESTMENTS COM 784117103 49,361 -1,305 -2.58 2,579 10.21 0.0073
2019-02-13 2018-12-31 13F SEI INVESTMENTS COM 784117103 50,666 -4,834 -8.71 2,340 -30.97 0.0079
2018-11-13 2018-09-30 13F SEI INVESTMENTS COM 784117103 55,500 -1,033 -1.83 3,390 -4.07 0.0096
2018-08-10 2018-06-30 13F SEI INVESTMENTS COM 784117103 56,533 -11,262 -16.61 3,534 -30.41 0.0109
2018-06-28 2018-03-31 13F/A-1 SEI INVESTMENTS COM 784117103 67,795 -10,749 -13.69 5,078 -10.03 0.0164
2018-05-14 2018-03-31 13F SEI INVESTMENTS COM 784117103 36,694 -41,850 2,748
2018-02-12 2017-12-31 13F SEI INVESTMENTS COM 784117103 78,544 -6,910 -8.09 5,644 8.18 0.0179
2017-11-13 2017-09-30 13F SEI INVESTMENTS COM 784117103 85,454 -1,184 -1.37 5,217 11.95 0.0173
2017-08-14 2017-06-30 13F SEI INVESTMENTS COM 784117103 86,638 -4,350 -4.78 4,660 1.55 0.0142
2017-05-15 2017-03-31 13F SEI INVESTMENTS COM 784117103 90,988 3,578 4.09 4,589 6.35 0.0157
2017-02-13 2016-12-31 13F SEI INVESTMENTS COM 784117103 87,410 -7,060 -7.47 4,315 0.12 0.0154
2016-11-14 2016-09-30 13F SEI INVESTMENTS COM 784117103 94,470 17,188 22.24 4,310 15.92 0.0148
2016-08-09 2016-06-30 13F SEI INVESTMENTS COM 784117103 77,282 8,706 12.70 3,718 25.91 0.0131
2016-05-13 2016-03-31 13F SEI INVESTMENTS COM 784117103 68,576 1,104 1.64 2,953 -16.46 0.0102
2016-02-08 2015-12-31 13F SEI INVESTMENTS COM 784117103 67,472 -1,529 -2.22 3,535 6.19 0.0120
2015-11-13 2015-09-30 13F SEI INVESTMENTS COM 784117103 69,001 592 0.87 3,329 -0.75 0.0119
2015-08-11 2015-06-30 13F SEI INVESTMENTS COM 784117103 68,409 -5,000 -6.81 3,354 3.65 0.0109
2015-05-14 2015-03-31 13F SEI INVESTMENTS COM 784117103 73,409 0 0.00 3,236 10.07 0.0103
2015-02-13 2014-12-31 13F/A-1 SEI INVESTMENTS COM 784117103 73,409 1,116 1.54 2,940 12.47 0.0093
2015-02-09 2014-12-31 13F SEI INVESTMENTS COM 784117103 69,845 2,780
2014-11-10 2014-09-30 13F SEI INVESTMENTS COM 784117103 72,293 1,070 1.50 2,614 12.00 0.0084
2014-08-08 2014-06-30 13F SEI INVESTMENTS COM 784117103 71,223 -8,800 -11.00 2,334 -13.20 0.0073
2014-05-13 2014-03-31 13F SEI INVESTMENTS COM 784117103 80,023 -350 -0.44 2,689 -3.65 0.0086
2014-02-11 2013-12-31 13F SEI INVESTMENTS COM 784117103 80,373 35,626 79.62 2,791 101.81 0.0091
2013-11-08 2013-09-30 13F SEI INVESTMENTS COM 784117103 44,747 7,847 21.27 1,383 31.84 0.0049
2013-08-13 2013-06-30 13F SEI INVESTMENTS COM 784117103 36,900 36,900 1,049 0.0042
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.