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Equibles

MSB

Mesabi Trust

Company with tickers: MSB

CIK
65172
CUSIP
590672101
Shares Outstanding
13,120,010
13F Activity (30d)
44 filings 42 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 75
Total Value: $211,709,216
Total Shares: 6,720,928

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 75 13F filers · Δ vs Dec 31, 2025
Top Holder
46.7%
Jun 2023 → Mar 2026 · range 28.6% – 55.7%
+0.0 pts
Top 5
72.4%
Jun 2023 → Mar 2026 · range 70.5% – 89.1%
+1.9 pts
Top 10
85.5%
Jun 2023 → Mar 2026 · range 83.1% – 94.9%
+2.4 pts
HHI
2,410
Jun 2023 → Mar 2026 · range 1,622 – 3,472
Moderately concentrated+19

Quarterly Activity

vs Dec 31, 2025
New
9
Increased
24
Decreased
24
Sold Out
18
Unchanged
18
Holder count: -9
Institutional value: -15.3%
Shares held: +3.6%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mid CWA Asset Management Group, LLC +219,241 447,485
Mid HORIZON KINETICS ASSET MANAGEMENT LLC +113,274 3,140,972
Large SEI INVESTMENTS CO +83,883 167,766
Mega CITADEL ADVISORS LLC +25,397 33,100
Small MAD RIVER INVESTORS +24,897 321,546

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Large O'SHAUGHNESSY ASSET MANAGEMENT, LLC −34,652 8,618
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP −18,500 15,700
Small VALUEWORKS LLC −17,589 646,582
Large COMMONWEALTH EQUITY SERVICES, LLC −11,830 19,011
Micro Verdad Advisers, LP −9,264 10,303

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Large FIRST MANHATTAN CO. LLC. 310,060 $9,766,890
Small Inspire Advisors, LLC 7,428 $233,982
Small BOURGEON CAPITAL MANAGEMENT LLC 6,999 $220,468
Mid SIMPLEX TRADING, LLC 2,483 $78,214
Large FIFTH THIRD BANCORP 550 $17,325

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Small BEDDOW CAPITAL MANAGEMENT INC 352,805 $13,590,048
Large Corient Private Wealth LLC 38,510 $1,483,405
Mega TWO SIGMA INVESTMENTS, LP 11,789 $454,112
Mid Apollon Wealth Management, LLC 11,736 $452,070
Mid RITHOLTZ WEALTH MANAGEMENT 10,459 $402,880
Filter: New 9 Increased 24 Reduced 24 Sold out 18 Unchanged 18
Showing 75 of 75
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mid HORIZON KINETICS ASSET MANAGEMENT LLC $98,940,618 46.73% 3,140,972
Small VALUEWORKS LLC $20,367,333 9.62% 646,582
Mid CWA Asset Management Group, LLC $14,095,777 6.66% 447,485
Small MAD RIVER INVESTORS $10,128,699 4.78% 321,546
Large FIRST MANHATTAN CO. LLC. $9,766,890 4.61% 310,060
Mid Advisory Services Network, LLC $5,815,813 2.75% 184,629
Mid Moors & Cabot, Inc. $5,699,767 2.69% 180,945
Mega BANK OF AMERICA CORP /DE/ Bank $5,603,251 2.65% 177,881
Small EagleClaw Capital Managment, LLC $5,347,912 2.53% 169,775
Large SEI INVESTMENTS CO $5,284,629 2.50% 167,766
Mega MORGAN STANLEY $3,592,417 1.70% 114,045
Mega Bank of New York Mellon Corp Bank $3,156,237 1.49% 100,198
Large Lido Advisors, LLC $2,519,401 1.19% 79,981
Mega GEODE CAPITAL MANAGEMENT, LLC $1,811,565 0.86% 57,510
Mega ROYAL BANK OF CANADA Bank $1,610,154 0.76% 51,116
Small MSRH, LLC $1,421,091 0.67% 45,114
Mega JPMORGAN CHASE & CO $1,143,575 0.54% 36,304
Small Redhawk Wealth Advisors, Inc. $1,075,441 0.51% 34,141
Micro PECAUT & CO. $1,069,834 0.51% 33,963
Mega CITADEL ADVISORS LLC $1,042,650 0.49% 33,100
Small NBC SECURITIES, INC. Broker-Dealer $968,373 0.46% 30,742
Large HighTower Advisors, LLC $835,254 0.39% 26,516
Large Steward Partners Investment Advisory, LLC $764,190 0.36% 24,260
Mega UBS Group AG $639,575 0.30% 20,304
Large COMMONWEALTH EQUITY SERVICES, LLC $598,846 0.28% 19,011
Mega LPL Financial LLC $587,853 0.28% 18,662
Mega WELLS FARGO & COMPANY/MN $566,748 0.27% 17,992
Small One Charles Private Wealth Services, LLC $543,784 0.26% 17,263
Large Janney Montgomery Scott LLC $538,650 0.25% 17,100
Large Russell Investments Group, Ltd. $537,925 0.25% 17,077
Small Westmount Partners, LLC $530,964 0.25% 16,856
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $495,621 0.23% 15,734
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $494,550 0.23% 15,700
Small Essex Financial Services, Inc. $438,259 0.21% 13,913
Mega RAYMOND JAMES FINANCIAL INC $396,647 0.19% 12,592
Micro Acorn Wealth Advisors, LLC $346,500 0.16% 11,000
Micro Verdad Advisers, LP $324,544 0.15% 10,303
Small STEINBERGANNA WEALTH MANAGEMENT $311,692 0.15% 9,895
Large O'SHAUGHNESSY ASSET MANAGEMENT, LLC $271,467 0.13% 8,618
Mega AMERIPRISE FINANCIAL INC $247,086 0.12% 7,844
Micro Atlas Wealth Partners, LLC $235,305 0.11% 7,470
Small Inspire Advisors, LLC $233,982 0.11% 7,428
Mega BANK OF MONTREAL /CAN/ Bank $233,131 0.11% 7,401
Small BOURGEON CAPITAL MANAGEMENT LLC $220,468 0.10% 6,999
Large OSAIC HOLDINGS, INC. $153,940 0.07% 4,887
Mid MAI Capital Management $143,010 0.07% 4,540
Small Quent Capital, LLC $95,791 0.05% 3,041
Mid SIMPLEX TRADING, LLC $78,214 0.04% 2,483
Large NewEdge Advisors, LLC $51,597 0.02% 1,638
Mid Farther Finance Advisors, LLC $47,187 0.02% 1,498
Small Medallion Wealth Advisors, LLC $39,060 0.02% 1,240
Small MARK SHEPTOFF FINANCIAL PLANNING, LLC $31,500 0.01% 1,000
Mega CITIGROUP INC $26,113 0.01% 829
Mid Colonial Trust Advisors $23,625 0.01% 750
Large CWM, LLC $21,483 0.01% 682
Large FIFTH THIRD BANCORP Bank $17,325 0.01% 550
Small Golden State Wealth Management, LLC $15,750 0.01% 500
Mid Allworth Financial LP $15,750 0.01% 500
Mid Cullen/Frost Bankers, Inc. Bank $15,750 0.01% 500
Large US BANCORP \DE\ Bank $12,600 0.01% 400
Micro Godfrey Financial Associates, Inc. $9,450 0.00% 300
Mid BEACON INVESTMENT ADVISORY SERVICES, INC. $9,450 0.00% 300
Small Bernard Wealth Management Corp. $7,843 0.00% 249
Small Anfield Capital Management, LLC $7,591 0.00% 241
Mid Tower Research Capital LLC (TRC) $6,363 0.00% 202
Small CoreCap Advisors, LLC $6,300 0.00% 200
Mid GROUP ONE TRADING LLC $4,567 0.00% 145
Small Aventura Private Wealth, LLC $4,032 0.00% 128
Small Financial Perspectives, Inc $3,150 0.00% 100
Micro WealthCollab, LLC $3,024 0.00% 96
Mid GHP Investment Advisors, Inc. $1,260 0.00% 40
Mid GAMMA Investing LLC $1,260 0.00% 40
Mega FMR LLC $1,165 0.00% 37
Large ASSETMARK, INC $567 0.00% 18
Large HUNTINGTON NATIONAL BANK Bank $31 0.00% 1

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