Mesabi Trust
US ˙ NYSE ˙ US5906721015

SecurityMSB / Mesabi Trust
InstitutionCitigroup Inc
Latest Disclosed Ownership829 shares
Latest Disclosed Value $ 26,114
Citigroup Inc reports 77.97% decrease in ownership of MSB / Mesabi Trust

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 829 shares of Mesabi Trust (US:MSB) valued at $26,114 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 3,763 shares of Mesabi Trust. This represents a change in shares of -77.97% during the quarter. The current value of the position is $21,156 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)
2026-05-11 2026-03-31 13F MESABI TR CTF BEN INT 590672101 829 -2,934 -77.97 26 -81.94 0.0000
2026-02-13 2025-12-31 13F MESABI TR CTF BEN INT 590672101 3,763 -23 -0.61 145 30.91 0.0001
2025-11-10 2025-09-30 13F MESABI TR CTF BEN INT 590672101 3,786 3,786 111 0.0000
2021-11-10 2021-09-30 13F MESABI TR CTF BEN INT 590672101 0 -2,500 -100.00 0 -100.00
2021-08-10 2021-06-30 13F MESABI TR CTF BEN INT 590672101 2,500 0 0.00 89 18.67 0.0001
2021-05-13 2021-03-31 13F MESABI TR CTF BEN INT 590672101 2,500 0 0.00 75 7.14 0.0000
2021-02-11 2020-12-31 13F MESABI TR CTF BEN INT 590672101 2,500 0 0.00 70 32.08 0.0000
2020-11-12 2020-09-30 13F MESABI TR CTF BEN INT 590672101 2,500 0 0.00 53 20.45 0.0000
2020-08-12 2020-06-30 13F MESABI TR CTF BEN INT 590672101 2,500 0 0.00 44 22.22 0.0000
2020-05-12 2020-03-31 13F MESABI TR CTF BEN INT 590672101 2,500 0 0.00 36 -38.98 0.0000
2020-02-12 2019-12-31 13F MESABI TR CTF BEN INT 590672101 2,500 0 0.00 59 -1.67 0.0000
2019-11-08 2019-09-30 13F MESABI TR CTF BEN INT 590672101 2,500 0 0.00 60 -18.92 0.0000
2019-08-12 2019-06-30 13F MESABI TR CTF BEN INT 590672101 2,500 0 0.00 74 1.37 0.0001
2019-05-13 2019-03-31 13F MESABI TR CTF BEN INT 590672101 2,500 0 0.00 73 23.73 0.0001
2019-02-12 2018-12-31 13F MESABI TR CTF BEN INT 590672101 2,500 0 0.00 59 -10.61 0.0001
2018-11-13 2018-09-30 13F MESABI TR CTF BEN INT 590672101 2,500 0 0.00 66 8.20 0.0001
2018-08-10 2018-06-30 13F MESABI TR CTF BEN INT 590672101 2,500 1,500 150.00 61 134.62 0.0001
2018-05-11 2018-03-31 13F MESABI TR CTF BEN INT 590672101 1,000 0 0.00 26 4.00 0.0000
2018-02-12 2017-12-31 13F MESABI TR CTF BEN INT 590672101 1,000 -200 -16.67 25 -10.71 0.0000
2017-11-13 2017-09-30 13F MESABI TR CTF BEN INT 590672101 1,200 0 0.00 28 75.00 0.0000
2017-08-11 2017-06-30 13F MESABI TR CTF BEN INT 590672101 1,200 200 20.00 16 6.67 0.0000
2017-05-12 2017-03-31 13F MESABI TR CTF BEN INT 590672101 1,000 0 0.00 15 36.36 0.0000
2017-02-10 2016-12-31 13F MESABI TR CTF BEN INT 590672101 1,000 0 0.00 11 22.22 0.0000
2016-11-10 2016-09-30 13F MESABI TR CTF BEN INT 590672101 1,000 0 0.00 9 -18.18 0.0000
2016-08-12 2016-06-30 13F MESABI TR CTF BEN INT 590672101 1,000 -30 -2.91 11 83.33 0.0000
2016-05-13 2016-03-31 13F MESABI TR CTF BEN INT 590672101 1,030 27 2.69 6 20.00 0.0000
2016-02-12 2015-12-31 13F MESABI TR CTF BEN INT 590672101 1,003 -171 -14.57 5 -64.29 0.0000
2015-11-13 2015-09-30 13F MESABI TR CTF BEN INT 590672101 1,174 -126 -9.69 14 -22.22 0.0000
2015-08-13 2015-06-30 13F MESABI TR CTF BEN INT 590672101 1,300 -42 -3.13 18 0.00 0.0000
2015-05-14 2015-03-31 13F MESABI TR CTF BEN INT 590672101 1,342 143 11.93 18 -14.29 0.0000
2015-02-17 2014-12-31 13F MESABI TR CTF BEN INT 590672101 1,199 76 6.77 21 0.00 0.0000
2014-11-14 2014-09-30 13F MESABI TR CTF BEN INT 590672101 1,123 -490 -30.38 21 -34.37 0.0000
2014-08-14 2014-06-30 13F MESABI TR CTF BEN INT 590672101 1,613 419 35.09 32 28.00 0.0000
2014-05-15 2014-03-31 13F MESABI TR CTF BEN INT 590672101 1,194 -1,446 -54.77 25 -57.63 0.0000
2014-02-14 2013-12-31 13F MESABI TR CTF BEN INT 590672101 2,640 600 29.41 59 31.11 0.0001
2013-11-14 2013-09-30 13F MESABI TR CTF BEN INT 590672101 2,040 -600 -22.73 45 -4.26 0.0000
2013-08-14 2013-06-30 13F MESABI TR CTF BEN INT 590672101 2,640 2,640 47 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.