SEI Investments Company
US ˙ NasdaqGS ˙ US7841171033

SecuritySEIC / SEI Investments Company
InstitutionIngalls & Snyder Llc
Latest Disclosed Ownership39,853 shares
Latest Disclosed Value $ 3,127
Ingalls & Snyder Llc reports 1.79% increase in ownership of SEIC / SEI Investments Company

On May 13, 2026 - Ingalls & Snyder Llc filed a 13F-HR form disclosing ownership of 39,853 shares of SEI Investments Company (US:SEIC) valued at $3,127,265 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 39,153 shares of SEI Investments Company. This represents a change in shares of 1.79% during the quarter. The current value of the position is $3,563,655 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)
2026-05-13 2026-03-31 13F SEI INVTS COM 784117103 39,853 700 1.79 3 0.00 0.1107
2026-02-13 2025-12-31 13F SEI INVTS COM 784117103 39,153 870 2.27 3 0.00 0.1179
2025-11-07 2025-09-30 13F SEI INVTS COM 784117103 38,283 2,198 6.09 3 0.00 0.1062
2025-07-31 2025-06-30 13F SEI INVTS COM 784117103 36,085 -20 -0.06 3 50.00 0.1150
2025-05-12 2025-03-31 13F SEI INVTS COM 784117103 36,105 -100 -0.28 3 0.00 0.0922
2025-01-29 2024-12-31 13F SEI INVTS COM 784117103 36,205 -5,545 -13.28 3 0.00 0.1171
2024-11-14 2024-09-30 13F SEI INVTS COM 784117103 41,750 -200 -0.48 3 0.00 0.1127
2024-07-31 2024-06-30 13F SEI INVTS COM 784117103 41,950 -500 -1.18 3 -33.33 0.1167
2024-05-13 2024-03-31 13F SEI INVTS COM 784117103 42,450 -500 -1.16 3 50.00 0.1348
2024-01-29 2023-12-31 13F SEI INVTS COM 784117103 42,950 -9,750 -18.50 3 -33.33 0.1234
2023-11-02 2023-09-30 13F SEI INVTS COM 784117103 52,700 -550 -1.03 3 0.00 0.1528
2023-07-27 2023-06-30 13F SEI INVTS COM 784117103 53,250 -650 -1.21 3 0.00 0.1520
2023-05-09 2023-03-31 13F SEI INVTS COM 784117103 53,900 -550 -1.01 3 0.00 0.1594
2023-01-31 2022-12-31 13F SEI INVTS COM 784117103 54,450 0 0.00 3 -99.89 0.1726
2022-10-21 2022-09-30 13F SEI INVTS COM 784117103 54,450 -5,370 -8.98 2,671 -17.33 0.1491
2022-08-11 2022-06-30 13F SEI INVTS COM 784117103 59,820 -375 -0.62 3,231 -10.84 0.1689
2022-05-09 2022-03-31 13F SEI INVTS COM 784117103 60,195 -100 -0.17 3,624 -1.36 0.1619
2022-02-11 2021-12-31 13F SEI INVTS COM 784117103 60,295 -125 -0.21 3,674 2.54 0.1657
2021-10-27 2021-09-30 13F SEI INVTS COM 784117103 60,420 0 0.00 3,583 -4.30 0.1641
2021-08-03 2021-06-30 13F SEI INVTS COM 784117103 60,420 -800 -1.31 3,744 0.38 0.1663
2021-04-21 2021-03-31 13F SEI INVTS CO 784117103 61,220 0 0.00 3,730 6.03 0.1741
2021-01-27 2020-12-31 13F SEI INVTS COM 784117103 61,220 0 0.00 3,518 13.30 0.1737
2020-10-21 2020-09-30 13F SEI INVTS COM 784117103 61,220 0 0.00 3,105 -7.75 0.2131
2020-07-31 2020-06-30 13F SEI INVTS COM 784117103 61,220 0 0.00 3,366 18.65 0.1933
2020-04-22 2020-03-31 13F SEI INVESTMENTS COM 784117103 61,220 -3,000 -4.67 2,837 -32.53 0.1912
2020-01-15 2019-12-31 13F SEI INVESTMENTS COM 784117103 64,220 -86 -0.13 4,205 10.37 0.2276
2019-10-16 2019-09-30 13F SEI INVESTMENTS COM 784117103 64,306 86 0.13 3,810 5.75 0.1859
2019-07-11 2019-06-30 13F SEI INVESTMENTS COM 784117103 64,220 0 0.00 3,603 7.39 0.1733
2019-04-11 2019-03-31 13F SEI INVESTMENTS COM 784117103 64,220 -226 -0.35 3,355 12.70 0.1599
2019-01-24 2018-12-31 13F SEI INVESTMENTS COM 784117103 64,446 -168 -0.26 2,977 -24.59 0.1572
2018-10-24 2018-09-30 13F SEI INVESTMENTS COM 784117103 64,614 -169 -0.26 3,948 -2.52 0.1664
2018-08-10 2018-06-30 13F SEI INVESTMENTS COM 784117103 64,783 -1,000 -1.52 4,050 -17.82 0.1880
2018-04-17 2018-03-31 13F SEI INVESTMENTS COM 784117103 65,783 0 0.00 4,928 4.25 0.2404
2018-01-19 2017-12-31 13F SEI INVESTMENTS COM 784117103 65,783 -4,000 -5.73 4,727 10.94 0.2175
2017-10-20 2017-09-30 13F SEI INVESTMENTS COM 784117103 69,783 -1,000 -1.41 4,261 11.93 0.2219
2017-07-28 2017-06-30 13F SEI INVESTMENTS COM 784117103 70,783 0 0.00 3,807 6.64 0.2067
2017-05-09 2017-03-31 13F SEI INVESTMENTS COM 784117103 70,783 0 0.00 3,570 2.18 0.1904
2017-01-25 2016-12-31 13F SEI INVESTMENTS COM 784117103 70,783 -1,150 -1.60 3,494 6.49 0.1902
2016-11-03 2016-09-30 13F SEI INVESTMENTS COM 784117103 71,933 -567 -0.78 3,281 -5.93 0.1830
2016-08-11 2016-06-30 13F SEI INVESTMENTS COM 784117103 72,500 0 0.00 3,488 11.76 0.2058
2016-04-29 2016-03-31 13F SEI INVESTMENTS COMMON 078411710 72,500 -6,807 -8.58 3,121 -24.89 0.1984
2016-01-27 2015-12-31 13F SEI INVESTMENTS COMMON 078411710 79,307 -200 -0.25 4,155 8.37 0.2655
2015-10-27 2015-09-30 13F SEI INVESTMENTS COMMON 078411710 79,507 0 0.00 3,834 -1.64 0.2506
2015-07-10 2015-06-30 13F SEI INVESTMENTS COMMON 078411710 79,507 0 0.00 3,898 11.21 0.2151
2015-04-15 2015-03-31 13F SEI INVESTMENTS COMMON 078411710 79,507 79,507 3,505 0.1930
2015-01-28 2014-12-31 13F SEI INVESTMENTS COMMON 078411710 0 -82,739 -100.00 0 -100.00
2014-10-28 2014-09-30 13F SEI INVESTMENTS COMMON 078411710 82,739 0 0.00 2,991 10.33 0.1609
2014-07-30 2014-06-30 13F SEI INVESTMENTS COMMON 078411710 82,739 0 0.00 2,711 -2.48 0.1332
2014-05-02 2014-03-31 13F SEI INVESTMENTS COMMON 078411710 82,739 -835 -1.00 2,780 -4.20 0.1490
2014-01-24 2013-12-31 13F SEI INVESTMENTS COMMON 078411710 83,574 0 0.00 2,902 12.35 0.1599
2013-11-12 2013-09-30 13F SEI INVESTMENTS COMMON 078411710 83,574 0 0.00 2,583 8.71 0.1544
2013-08-09 2013-06-30 13F/A-1 SEI INVESTMENTS COMMON 078411710 83,574 83,574 2,376 0.1514
2013-08-08 2013-06-30 13F SEI INVESTMENTS COMMON 078411710 78,574 2,233
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.