SEI Investments Company
US ˙ NasdaqGS ˙ US7841171033

SecuritySEIC / SEI Investments Company
InstitutionDynamic Technology Lab Private Ltd
Latest Disclosed Ownership21,518 shares
Latest Disclosed Value $ 1,215,982
Dynamic Technology Lab Private Ltd reports 63.63% increase in ownership of SEIC / SEI Investments Company

On May 15, 2026 - Dynamic Technology Lab Private Ltd filed a 13F-HR form disclosing ownership of 21,518 shares of SEI Investments Company (US:SEIC) valued at $1,688,517 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 13,150 shares of SEI Investments Company. This represents a change in shares of 63.63% during the quarter. The current value of the position is $1,906,064 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.

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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 21,518 8,368 63.63 1,216 12.60 0.1976
2026-02-13 2025-12-31 13F SEI INVTS COM 784117103 13,150 -2,635 -16.69 1,079 -19.42 0.2445
2025-11-13 2025-09-30 13F SEI INVTS COM 784117103 15,785 5,196 49.07 1,339 40.65 0.2268
2025-08-12 2025-06-30 13F SEI INVTS COM 784117103 10,589 10,589 952 0.1294
2024-11-13 2024-09-30 13F SEI INVTS COM 784117103 0 -18,040 -100.00 0 -100.00
2024-08-15 2024-06-30 13F SEI INVTS COM 784117103 18,040 18,040 1 0.1318
2024-05-14 2024-03-31 13F SEI INVTS COM 784117103 0 -22,759 -100.00 0 -100.00
2024-02-09 2023-12-31 13F SEI INVTS COM 784117103 22,759 22,759 1 0.1529
2023-11-14 2023-09-30 13F SEI INVTS COM 784117103 0 -16,730 -100.00 0 0.0000
2023-08-14 2023-06-30 13F SEI INVTS COM 784117103 16,730 16,730 1 0.1257
2022-11-14 2022-09-30 13F SEI INVTS COM 784117103 0 -6,160 -100.00 0 -100.00
2022-08-12 2022-06-30 13F SEI INVTS COM 784117103 6,160 6,160 333 0.0376
2022-05-16 2022-03-31 13F SEI INVTS COM 784117103 0 -14,540 -100.00 0 -100.00
2022-02-14 2021-12-31 13F SEI INVTS COM 784117103 14,540 8,900 157.80 886 165.27 0.0981
2021-11-15 2021-09-30 13F SEI INVTS COM 784117103 5,640 -4,473 -44.23 334 -46.73 0.0400
2021-08-13 2021-06-30 13F SEI INVTS COM 784117103 10,113 10,113 627 0.0631
2021-05-14 2021-03-31 13F SEI INVTS COM 784117103 0 -13,444 -100.00 0 -100.00
2021-02-11 2020-12-31 13F SEI INVTS COM 784117103 13,444 4,247 46.18 773 65.88 0.1249
2020-11-13 2020-09-30 13F SEI INVTS COM 784117103 9,197 9,197 -31.59 466 -39.72 0.0750
2020-08-14 2020-06-30 13F SEI INVESTMENTS COM 784117103 0 -17,729 -100.00 0 -100.00
2020-05-13 2020-03-31 13F SEI INVESTMENTS COM 784117103 17,729 17,729 822 0.1603
2020-02-14 2019-12-31 13F SEI INVESTMENTS COM 784117103 0 -19,512 -100.00 0 -100.00
2019-11-14 2019-09-30 13F SEI INVESTMENTS COM 784117103 19,512 19,512 1,156 0.2030
2019-05-13 2019-03-31 13F SEI INVESTMENTS COM 784117103 0 -24,093 -100.00 0 -100.00
2019-02-13 2018-12-31 13F SEI INVESTMENTS COM 784117103 24,093 15,651 185.39 1,113 116.12 0.1925
2018-11-14 2018-09-30 13F SEI INVESTMENTS COM 784117103 8,442 -11,761 -58.21 515 -59.22 0.0715
2018-08-14 2018-06-30 13F SEI INVESTMENTS COM 784117103 20,203 20,203 139.32 1,263 145.24 0.1902
2017-11-08 2017-09-30 13F SEI INVESTMENTS COM 784117103 0 -13,960 -100.00 0 -100.00
2017-08-17 2017-06-30 13F SEI INVESTMENTS COM 784117103 13,960 9,499 212.93 750 234.82 0.1416
2017-05-11 2017-03-31 13F SEI INVESTMENTS COM 784117103 4,461 -5,078 -53.23 224 -18.55 0.0526
2016-02-22 2013-03-31 13F/A-1 SEI INVESTMENTS COM 784117103 9,539 9,539 275 0.4949
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.