DOSSIER · 13F Holders · Q2 2026
MSB

MESABI TR

69 institutions still hold MESABI TR as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 590672101·69 13F holders·last filed Jun 30, 2026
Market cap
—
13F value held
$165M
visible holders
Holders
69
filers reporting
Concentration
49.45%
HORIZON KINETICS ASSET MANAGEMENT LLC #1
top holder share
AI Holders Summary · Q2 2026

69 institutions reported MSB in Q2 2026. HORIZON KINETICS ASSET MANAGEMENT LLC leads at 49.5% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
HORIZON KINETICS ASSET MANAGEMENT LLC
CIK 0001056823
$81M3.2M0.92%Q2 2026
02
VALUEWORKS LLC
CIK 0001282189
$17M670K3.54%Q2 2026
03
BEDDOW CAPITAL MANAGEMENT INC
CIK 0001278641
$14M353K5.13%Q4 2025
04
CWA Asset Management Group, LLC
CIK 0001667134
$10M518K0.30%Q3 2026
05
FIRST MANHATTAN CO. LLC.
CIK 0000728083
$10M396K0.03%Q2 2026
06
MAD RIVER INVESTORS
CIK 0001384484
$6M327K2.61%Q3 2026
07
Advisory Services Network, LLC
CIK 0001573876
$5M186K0.05%Q2 2026
08
EagleClaw Capital Managment, LLC
CIK 0001607636
$3M171K0.44%Q3 2026
09
Moors & Cabot, Inc.
CIK 0001607239
$3M170K0.13%Q3 2026
10
MORGAN STANLEY
CIK 0000895421
$3M113K0.00%Q2 2026
11
SEI INVESTMENTS CO
CIK 0000350894
$2M84K0.00%Q2 2026
12
Bank of New York Mellon Corp
CIK 0001390777
$2M102K0.00%Q3 2026
13
Lido Advisors, LLC
CIK 0001650150
$2M80K0.00%Q3 2026
14
ROYAL BANK OF CANADA
CIK 0001000275
$1M55K0.00%Q2 2026
15
BANK OF AMERICA CORP /DE/
CIK 0000070858
$1M45K0.00%Q2 2026
16
CITADEL ADVISORS LLC
CIK 0001423053
$888K35K0.00%Q2 2026
17
JPMORGAN CHASE & CO
CIK 0000019617
$873K37K0.00%Q2 2026
18
PECAUT & CO.
CIK 0001597200
$665K34K0.19%Q3 2026
19
HighTower Advisors, LLC
CIK 0001462245
$648K26K0.00%Q2 2026
20
NBC SECURITIES, INC.
CIK 0000791540
$630K32K0.04%Q3 2026
Page 1 of 4
49 more holders available. Log in →
Insiders at MESABI TR
Radke Robin M. →Ehrenberg James A →