시버트 파이낸셜 코퍼레이션
DE ˙ BST ˙ FR0000064271
SecurityDE:STF / Siebert Financial Corp.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership138,625 shares
Latest Disclosed Value $ 266,161
Northern Trust Corp reports 7.96% increase in ownership of STF / Siebert Financial Corp.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 138,625 shares of Siebert Financial Corp. (DE:STF) valued at $266,161 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 128,409 shares of Siebert Financial Corp.. This represents a change in shares of 7.96% 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)
2026-05-14 2026-03-31 13F SIEBERT FINL COM 826176109 138,625 10,216 7.96 266 -40.89 0.0000
2026-02-17 2025-12-31 13F SIEBERT FINL COM 826176109 128,409 -12,922 -9.14 451 9.22 0.0001
2025-11-14 2025-09-30 13F SIEBERT FINL COM 826176109 141,331 24,451 20.92 413 -20.16 0.0001
2025-08-13 2025-06-30 13F SIEBERT FINL COM 826176109 116,880 76,297 188.00 517 322.95 0.0001
2025-05-13 2025-03-31 13F SIEBERT FINL COM 826176109 40,583 0 0.00 122 -4.69 0.0000
2025-02-14 2024-12-31 13F SIEBERT FINL COM 826176109 40,583 5,323 15.10 128 43.82 0.0000
2024-11-13 2024-09-30 13F SIEBERT FINL COM 826176109 35,260 -182 -0.51 89 45.90 0.0000
2024-08-14 2024-06-30 13F SIEBERT FINL COM 826176109 35,442 -1,849 -4.96 62 -21.79 0.0000
2024-05-14 2024-03-31 13F SIEBERT FINL COM 826176109 37,291 0 0.00 79 25.81 0.0000
2024-02-13 2023-12-31 13F SIEBERT FINL COM 826176109 37,291 -2,127 -5.40 63 -18.42 0.0000
2023-11-13 2023-09-30 13F SIEBERT FINL COM 826176109 39,418 -583 -1.46 77 -23.23 0.0000
2023-08-11 2023-06-30 13F SIEBERT FINL COM 826176109 40,001 6,083 17.93 99 54.69 0.0000
2023-05-15 2023-03-31 13F SIEBERT FINL COM 826176109 33,918 -390 -1.14 65 39.13 0.0000
2023-02-13 2022-12-31 13F SIEBERT FINL COM 826176109 34,308 0 0.00 47 -8.00 0.0000
2022-11-14 2022-09-30 13F SIEBERT FINL COM 826176109 34,308 1,162 3.51 50 -1.96 0.0000
2022-08-12 2022-06-30 13F SIEBERT FINL COM 826176109 33,146 517 1.58 51 -27.14 0.0000
2022-05-13 2022-03-31 13F SIEBERT FINL COM 826176109 32,629 -421 -1.27 70 -7.89 0.0000
2022-02-08 2021-12-31 13F SIEBERT FINL COM 826176109 33,050 1,174 3.68 76 -28.97 0.0000
2021-11-15 2021-09-30 13F SIEBERT FINL COM 826176109 31,876 106 0.33 107 -30.07 0.0000
2021-08-13 2021-06-30 13F SIEBERT FINL COM 826176109 31,770 -100,662 -76.01 153 -71.51 0.0000
2021-05-12 2021-03-31 13F SIEBERT FINL COM 826176109 132,432 -9,869 -6.94 537 -10.20 0.0001
2021-02-11 2020-12-31 13F SIEBERT FINL COM 826176109 142,301 -2,853 -1.97 598 27.51 0.0001
2020-11-16 2020-09-30 13F SIEBERT FINL COM 826176109 145,154 20,524 16.47 469 -25.67 0.0001
2020-08-14 2020-06-30 13F SIEBERT FINL COM 826176109 124,630 5,609 4.71 631 -26.54 0.0001
2020-05-14 2020-03-31 13F SIEBERT FINL COM 826176109 119,021 20,131 20.36 859 0.47 0.0002
2020-02-14 2019-12-31 13F SIEBERT FINL COM 826176109 98,890 -3,937 -3.83 855 -9.62 0.0002
2019-11-13 2019-09-30 13F SIEBERT FINL COM 826176109 102,827 3,110 3.12 946 5.46 0.0002
2019-08-13 2019-06-30 13F SIEBERT FINL COM 826176109 99,717 1,913 1.96 897 -22.34 0.0002
2019-05-13 2019-03-31 13F SIEBERT FINL COM 826176109 97,804 3,106 3.28 1,155 -15.63 0.0003
2019-02-12 2018-12-31 13F SIEBERT FINL COM 826176109 94,698 0 0.00 1,369 -1.30 0.0004
2018-11-14 2018-09-30 13F SIEBERT FINL COM 826176109 94,698 52,717 125.57 1,387 217.39 0.0003
2018-09-18 2018-06-30 13F/A-1 SIEBERT FINL COM 826176109 41,981 11,602 38.19 437 70.70 0.0001
2018-08-14 2018-06-30 13F SIEBERT FINL COM 826176109 41,981 11,602 437
2018-05-09 2018-03-31 13F SIEBERT FINL COM 826176109 30,379 -241 -0.79 256 -38.01 0.0001
2018-02-14 2017-12-31 13F SIEBERT FINL COM 826176109 30,620 1,047 3.54 413 256.03 0.0001
2017-11-13 2017-09-30 13F SIEBERT FINL COM 826176109 29,573 0 0.00 116 -0.85 0.0000
2017-08-11 2017-06-30 13F SIEBERT FINL COM 826176109 29,573 2,680 9.97 117 20.62 0.0000
2017-05-12 2017-03-31 13F SIEBERT FINL COM 826176109 26,893 1,975 7.93 97 29.33 0.0000
2017-02-13 2016-12-31 13F SIEBERT FINL COM 826176109 24,918 0 0.00 75 120.59 0.0000
2016-11-09 2016-09-30 13F SIEBERT FINL COM 826176109 24,918 0 0.00 34 13.33 0.0000
2016-08-12 2016-06-30 13F SIEBERT FINL COM 826176109 24,918 0 0.00 30 -6.25 0.0000
2016-08-19 2016-03-31 13F/A-1 SIEBERT FINL COM 826176109 24,918 0 0.00 32 0.00 0.0000
2016-05-13 2016-03-31 13F SIEBERT FINL COM 826176109 24,918 32
2016-02-12 2015-12-31 13F SIEBERT FINL COM 826176109 24,918 0 0.00 32 -17.95 0.0000
2015-11-12 2015-09-30 13F SIEBERT FINL COM 826176109 24,918 24,918 0.00 39 0.0000
2015-08-13 2015-06-30 13F SIEBERT FINL COM 826176109 0 -24,418 -100.00 0 -100.00
2015-05-14 2015-03-31 13F SIEBERT FINL COM 826176109 24,418 -11,375 -31.78 43 -45.57 0.0000
2015-02-12 2014-12-31 13F SIEBERT FINL COM 826176109 35,793 236 0.66 79 2.60 0.0000
2014-11-13 2014-09-30 13F SIEBERT FINL COM 826176109 35,557 236 0.67 77 -22.22 0.0000
2014-08-14 2014-06-30 13F SIEBERT FINL COM 826176109 35,321 0 0.00 99 -9.17 0.0000
2014-05-14 2014-03-31 13F SIEBERT FINL COM 826176109 35,321 0 0.00 109 91.23 0.0000
2014-02-21 2013-12-31 13F/A-1 SIEBERT FINL COM 826176109 35,321 -80 -0.23 57 -5.00 0.0000
2014-02-12 2013-12-31 13F SIEBERT FINL COM 826176109 35,321 57
2013-11-13 2013-09-30 13F SIEBERT FINL COM 826176109 35,401 -6,587 -15.69 60 -6.25 0.0000
2013-08-09 2013-06-30 13F SIEBERT FINL COM 826176109 41,988 41,988 64 0.0000
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.