Latest Period
Q1 2026
Security Snapshot
MESABI TRUST - Units of Beneficial Interest (MSB) Institutional Ownership
CUSIP: 590672101
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
73
Shares (Excl. Options)
6,672,128
Price
$31.50
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- Security type / class
- Equity / Units of Beneficial Interest
- Symbol
- MSB on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 6,672,128
- Total 13F value
- $210,161,164
- Portfolio coverage rank
- 0%
- Share change
- +612,936
- Value change
- +$18,748,682
- Number of holders
- 73
- Shares outstanding
- 13,142,142
- SEC-reported price per share
- $26.48
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- MSB - MESABI TRUST - Units of Beneficial Interest is tracked under CUSIP 590672101.
- 73 institutions reported positions in Q1 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 82 to 73 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $246,280,614 to $210,161,164.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 73 institutions filings for Q1 2026.
Security key
590672101
Latest holder period
Q1 2026
13F holders
73
13D/G owners
2
CIK / CUSIP context first
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 590672101:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
MSB
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| HORIZON KINETICS ASSET MANAGEMENT LLC | 24% | +4.3% | $98,940,618 | +$4,461,849 | 3,140,972 | +4.7% | HORIZON KINETICS ASSET MANAGEMENT LLC | 31 Mar 2026 |
| VALUEWORKS LLC | 5.2% | $16,631,766 | 685,846 | VALUEWORKS LLC | 30 Jun 2025 |
As of 31 Mar 2026, 73 institutional investors reported holding 6,672,128 shares of MESABI TRUST - Units of Beneficial Interest (MSB). This represents 51% of the company’s total 13,142,142 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
49%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| HORIZON KINETICS ASSET MANAGEMENT LLC | 24% | 3,140,972 | +3.7% | 1.1% | $98,940,608 |
| VALUEWORKS LLC | 4.9% | 646,582 | -2.6% | 5.6% | $20,367,323 |
| CWA Asset Management Group, LLC | 3.4% | 447,485 | +96% | 0.48% | $14,066,960 |
| MAD RIVER INVESTORS | 2.4% | 321,546 | +8.4% | 3.7% | $10,128,689 |
| FIRST MANHATTAN CO. LLC. | 2.4% | 310,060 | 0.03% | $9,766,505 | |
| Advisory Services Network, LLC | 1.4% | 184,629 | +1.7% | 0.08% | $5,815,821 |
| Moors & Cabot, Inc. | 1.4% | 180,945 | -2.7% | 0.24% | $5,699,772 |
| BANK OF AMERICA CORP /DE/ | 1.4% | 177,881 | 0% | 0% | $5,603,251 |
| EagleClaw Capital Managment, LLC | 1.3% | 169,775 | +1.5% | 0.75% | $5,347,913 |
| SEI INVESTMENTS CO | 1.3% | 167,766 | +100% | 0% | $5,284,629 |
| MORGAN STANLEY | 0.87% | 114,045 | +4.9% | 0% | $3,592,418 |
| Bank of New York Mellon Corp | 0.76% | 100,198 | +7.8% | 0% | $3,156,223 |
| Lido Advisors, LLC | 0.61% | 79,981 | 0% | 0.01% | $2,519,413 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.44% | 57,510 | -11% | 0% | $1,811,565 |
| ROYAL BANK OF CANADA | 0.39% | 51,116 | +20% | 0% | $1,611,000 |
| MSRH, LLC | 0.34% | 45,114 | 0% | 1.3% | $1,421,091 |
| JPMORGAN CHASE & CO | 0.28% | 36,304 | -1.8% | 0% | $1,169,352 |
| Redhawk Wealth Advisors, Inc. | 0.26% | 34,141 | -3.9% | 0.12% | $1,073,432 |
| PECAUT & CO. | 0.26% | 33,963 | 0% | 0.35% | $1,067,457 |
| NBC SECURITIES, INC. | 0.23% | 30,742 | -9.4% | 0.07% | $968,373 |
| HighTower Advisors, LLC | 0.2% | 26,516 | -1.2% | 0% | $835,207 |
| Steward Partners Investment Advisory, LLC | 0.18% | 24,260 | +0.45% | 0% | $764,190 |
| UBS Group AG | 0.15% | 20,304 | -11% | 0% | $639,577 |
| COMMONWEALTH EQUITY SERVICES, LLC | 0.14% | 19,011 | -38% | 0% | $598,860 |
| LPL Financial LLC | 0.14% | 18,662 | -22% | 0% | $587,845 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 6,672,128 | $210,161,164 | +$18,748,682 | $31.50 | 73 |
| 2025 Q4 | 6,412,547 | $246,280,614 | +$8,552,593 | $38.52 | 82 |
| 2025 Q3 | 6,126,333 | $179,259,381 | +$4,824,521 | $29.27 | 70 |
| 2025 Q2 | 5,957,381 | $143,707,494 | +$5,064,529 | $23.96 | 61 |
| 2025 Q1 | 5,769,618 | $156,842,285 | -$8,295,724 | $27.20 | 62 |
| 2024 Q4 | 6,071,131 | $170,651,694 | +$13,109,526 | $28.11 | 58 |
| 2024 Q3 | 5,574,366 | $126,285,588 | +$3,121,668 | $22.65 | 46 |
| 2024 Q2 | 5,473,109 | $94,249,507 | +$2,554,139 | $17.23 | 47 |
| 2024 Q1 | 5,321,740 | $94,191,827 | -$2,457,822 | $17.70 | 50 |
| 2023 Q4 | 5,452,407 | $111,608,971 | -$15,469 | $20.47 | 50 |
| 2023 Q3 | 5,452,780 | $109,432,056 | +$3,959,480 | $20.07 | 45 |
| 2023 Q2 | 5,253,202 | $106,951,688 | +$1,261,806 | $20.41 | 45 |
| 2023 Q1 | 5,178,553 | $130,396,917 | +$7,772,703 | $25.18 | 42 |
| 2022 Q4 | 4,914,009 | $88,548,356 | +$5,874,174 | $18.02 | 50 |
| 2022 Q3 | 4,561,308 | $98,106,203 | -$631,228 | $21.51 | 52 |
| 2022 Q2 | 4,574,122 | $112,224,624 | +$2,341,218 | $24.52 | 53 |
| 2022 Q1 | 4,470,461 | $119,093,379 | +$3,190,150 | $26.64 | 56 |
| 2021 Q4 | 4,354,369 | $115,034,273 | +$11,368,769 | $26.42 | 52 |
| 2021 Q3 | 3,851,946 | $115,516,498 | +$945,116 | $29.71 | 58 |
| 2021 Q2 | 3,813,896 | $135,011,223 | +$11,482,699 | $35.40 | 64 |
| 2021 Q1 | 3,494,893 | $105,176,008 | +$15,389,109 | $30.08 | 56 |
| 2020 Q4 | 2,992,708 | $83,884,067 | +$13,225,825 | $28.05 | 45 |
| 2020 Q3 | 2,533,649 | $53,777,234 | +$13,659,523 | $21.22 | 39 |
| 2020 Q2 | 1,895,147 | $33,179,839 | +$3,093,449 | $17.51 | 37 |
| 2020 Q1 | 1,730,601 | $24,716,552 | -$7,712,637 | $14.30 | 32 |