SEI投資公司
MX ˙ BMV ˙ US7841171033
SecurityMX:SEIC / SEI Investments Company
InstitutionStifel Financial Corp
Latest Disclosed Ownership101,218 shares
Latest Disclosed Value $ 7,942,890
Stifel Financial Corp reports 4.69% increase in ownership of SEIC / SEI Investments Company

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 101,218 shares of SEI Investments Company (MX:SEIC) valued at $7,942,890 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 96,685 shares of SEI Investments Company. This represents a change in shares of 4.69% 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 101,218 4,533 4.69 7,943 0.15 0.0017
2026-02-13 2025-12-31 13F SEI INVTS COM 784117103 96,685 64,544 200.82 7,930 190.80 0.0071
2025-11-12 2025-09-30 13F SEI INVTS COM 784117103 32,141 -1,706 -5.04 2,727 -10.33 0.0025
2025-08-14 2025-06-30 13F SEI INVTS COM 784117103 33,847 17,305 104.61 3,042 136.84 0.0030
2025-05-14 2025-03-31 13F SEI INVTS COM 784117103 16,542 -765 -4.42 1,284 -10.02 0.0014
2025-02-13 2024-12-31 13F SEI INVTS COM 784117103 17,307 -17 -0.10 1,427 19.12 0.0015
2024-11-14 2024-09-30 13F SEI INVTS COM 784117103 17,324 -676 -3.76 1,199 2.92 0.0013
2024-08-13 2024-06-30 13F SEI INVTS COM 784117103 18,000 -147 -0.81 1,164 -10.74 0.0013
2024-05-14 2024-03-31 13F SEI INVTS COM 784117103 18,147 163 0.91 1,305 14.19 0.0015
2024-02-12 2023-12-31 13F SEI INVTS COM 784117103 17,984 10,660 145.55 1,143 158.96 0.0014
2023-11-13 2023-09-30 13F SEI INVTS COM 784117103 7,324 1,671 29.56 441 30.86 0.0006
2023-08-14 2023-06-30 13F SEI INVTS COM 784117103 5,653 -40 -0.70 337 3.06 0.0005
2023-05-12 2023-03-31 13F SEI INVTS COM 784117103 5,693 -20,175 -77.99 328 -78.32 0.0005
2023-02-13 2022-12-31 13F SEI INVTS COM 784117103 25,868 -2,574 -9.05 1,508 8.10 0.0023
2022-11-14 2022-09-30 13F SEI INVTS COM 784117103 28,442 -4,741 -14.29 1,395 -22.20 0.0023
2022-08-15 2022-06-30 13F SEI INVTS COM 784117103 33,183 -6,421 -16.21 1,793 -24.82 0.0028
2022-05-13 2022-03-31 13F SEI INVTS COM 784117103 39,604 19,633 98.31 2,385 95.97 0.0033
2022-02-14 2021-12-31 13F SEI INVTS COM 784117103 19,971 783 4.08 1,217 7.04 0.0016
2021-11-15 2021-09-30 13F SEI INVTS COM 784117103 19,188 609 3.28 1,137 -1.22 0.0017
2021-08-13 2021-06-30 13F SEI INVTS COM 784117103 18,579 97 0.52 1,151 2.22 0.0017
2021-05-14 2021-03-31 13F SEI INVTS COM 784117103 18,482 -854 -4.42 1,126 1.35 0.0019
2021-02-12 2020-12-31 13F SEI INVTS COM 784117103 19,336 7,203 59.37 1,111 80.65 0.0020
2020-11-16 2020-09-30 13F SEI INVTS COM 784117103 12,133 167 1.40 615 -6.53 0.0013
2020-08-14 2020-06-30 13F SEI INVTS COM 784117103 11,966 344 2.96 658 22.08 0.0015
2020-05-14 2020-03-31 13F SEI INVESTMENTS COM 784117103 11,622 353 3.13 539 -26.87 0.0015
2020-02-13 2019-12-31 13F SEI INVESTMENTS COM 784117103 11,269 58 0.52 737 10.99 0.0015
2019-11-19 2019-09-30 13F/A-1 SEI INVESTMENTS COM 784117103 11,211 105 0.95 664 6.41 0.0017
2019-11-13 2019-09-30 13F SEI INVESTMENTS COM 784117103 11,211 105 664 372.2053
2019-08-14 2019-06-30 13F SEI INVESTMENTS COM 784117103 11,106 -15,419 -58.13 624 -55.01 0.0016
2019-05-14 2019-03-31 13F SEI INVESTMENTS COM 784117103 26,525 -474 -1.76 1,387 11.32 0.0039
2019-02-13 2018-12-31 13F SEI INVESTMENTS COM 784117103 26,999 -15 -0.06 1,246 -24.53 0.0040
2018-11-13 2018-09-30 13F SEI INVESTMENTS COM 784117103 27,014 -558 -2.02 1,651 -4.29 0.0047
2018-08-14 2018-06-30 13F SEI INVESTMENTS COM 784117103 27,572 -1,715 -5.86 1,725 -21.38 0.0053
2018-05-11 2018-03-31 13F SEI INVESTMENTS COM 784117103 29,287 -1,149 -3.78 2,194 0.32 0.0069
2018-02-14 2017-12-31 13F SEI INVESTMENTS COM 784117103 30,436 -1,262 -3.98 2,187 13.08 0.0069
2017-11-13 2017-09-30 13F SEI INVESTMENTS COM 784117103 31,698 -153 -0.48 1,934 12.84 0.0067
2017-08-14 2017-06-30 13F SEI INVESTMENTS COM 784117103 31,851 -2,297 -6.73 1,714 -0.46 0.0064
2017-05-10 2017-03-31 13F SEI INVESTMENTS COM 784117103 34,148 1,981 6.16 1,722 8.44 0.0067
2017-02-16 2016-12-31 13F SEI INVESTMENTS COM 784117103 32,167 749 2.38 1,588 10.74 0.0067
2016-11-15 2016-09-30 13F SEI INVESTMENTS COM 784117103 31,418 -207 -0.65 1,434 -5.78 0.0064
2016-08-17 2016-06-30 13F SEI INVESTMENTS COM 784117103 31,625 -159 -0.50 1,522 11.34 0.0070
2016-05-16 2016-03-31 13F SEI INVESTMENTS COM 784117103 31,784 29 0.09 1,367 -17.85 0.0073
2016-03-21 2015-12-31 13F/A-2 SEI INVESTMENTS COM 784117103 31,755 13,202 71.16 1,664 85.92 0.0087
2016-02-26 2015-12-31 13F/A-1 SEI INVESTMENTS COM 784117103 31,755 0 1,664 0.0087
2016-02-16 2015-12-31 13F SEI INVESTMENTS COM 784117103 31,755 1,968
2015-11-16 2015-09-30 13F SEI INVESTMENTS COM 784117103 18,553 183 1.00 895 -0.67 0.0050
2015-08-17 2015-06-30 13F/A-1 SEI INVESTMENTS COM 784117103 18,370 50 0.27 901 11.65 0.0047
2015-08-17 2015-06-30 13F SEI INVESTMENTS COM 784117103 18,370 901
2015-05-14 2015-03-31 13F SEI INVESTMENTS COM 784117103 18,320 20 0.11 807 10.10 0.0044
2015-02-13 2014-12-31 13F SEI INVESTMENTS COM 784117103 18,300 5,000 37.59 733 52.39 0.0041
2014-11-13 2014-09-30 13F SEI INVESTMENTS COM 784117103 13,300 0 0.00 481 10.32 0.0042
2014-08-14 2014-06-30 13F SEI INVESTMENTS COM 784117103 13,300 6,000 82.19 436 77.96 0.0039
2014-05-15 2014-03-31 13F SEI INVESTMENTS COM 784117103 7,300 7,300 245 0.0023
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.