SEI Investments Company
DE ˙ DB ˙ US7841171033
73,00 € 0,00 (0,00%)
2026-06-04
AKTIENPREIS
SecurityDE:SI3 / SEI Investments Company
InstitutionHeadlands Technologies LLC
Latest Disclosed Ownership15,462 shares
Latest Disclosed Value $ 1,213,303
Headlands Technologies LLC reports 35.73% decrease in ownership of SI3 / SEI Investments Company

On May 13, 2026 - Headlands Technologies LLC filed a 13F-HR form disclosing ownership of 15,462 shares of SEI Investments Company (DE:SI3) valued at $1,020,492 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 24,059 shares of SEI Investments Company. This represents a change in shares of -35.73% during the quarter. The current value of the position is $1,144,188 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)
2026-05-13 2026-03-31 13F SEI INVTS COM 784117103 15,462 -8,597 -35.73 1,213 -38.52 0.1382
2026-02-13 2025-12-31 13F SEI INVTS COM 784117103 24,059 8,719 56.84 1,973 51.65 0.1647
2025-11-12 2025-09-30 13F SEI INVTS COM 784117103 15,340 4,263 38.49 1,302 30.75 0.1039
2025-08-14 2025-06-30 13F SEI INVTS COM 784117103 11,077 -4,204 -27.51 995 -16.10 0.1192
2025-05-09 2025-03-31 13F SEI INVTS COM 784117103 15,281 12,293 411.41 1,186 382.11 0.1352
2025-02-12 2024-12-31 13F SEI INVTS COM 784117103 2,988 -11,586 -79.50 246 -75.60 0.0248
2024-11-12 2024-09-30 13F SEI INVTS COM 784117103 14,574 6,955 91.28 1,008 104.88 0.1159
2024-08-07 2024-06-30 13F SEI INVTS COM 784117103 7,619 7,619 493 0.0523
2024-05-07 2024-03-31 13F SEI INVTS COM 784117103 0 -9 -100.00 0 0.0000
2024-02-02 2023-12-31 13F SEI INVTS COM 784117103 9 9 1 0.0002
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.