Ticker · CUSIP 590672101

MSB

RT
MESABI TR
···Share
Holders (tracked)
2
Combined shares
19,492
Combined value
$750.8K
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
Flat over the last 8 quarters.
242024Q12025Q4

SEC event timeline

3 events
  1. Ken Griffin (Citadel Advisors) added2026-02-17
    +527 shares · 2025Q4
    Position
  2. Two Sigma Investments trimmed2026-02-17
    −4,620 shares · 2025Q4
    Position
  3. Two Sigma Investments trimmed2025-11-14
    −12,415 shares · 2025Q3
    Position

Insider activity

No insider transactions in the last 30 days.
View full insider history for MSB →

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.
New positions0
—
Added to1
Trimmed1
Exited0
—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
3
$1.5M
2022Q2
2
$569K
2022Q3
4
$1.2M
2022Q4
5
$1.9M
2023Q1
2
$745K
2023Q2
3
$649K
2023Q3
3
$441K
2023Q4
4
$1.3M
2024Q1
4
$1.5M
2024Q2
4
$1.2M
2024Q3
4
$1.2M
2024Q4
4
$1.7M
2025Q1
3
$1.3M
2025Q2
2
$980K
2025Q3
2
$690K
2025Q4
2
$751K

Who owns MSB

2 super-investors · 2025Q4
Tracked stake
19.5K
shares
Combined value
$751K
% of shares outstanding
—
shares-out unknown
Quarter action mix
Added1Trim1
#ManagerSharesValue
1Two Sigma Investments11.8K$454K
2Ken Griffin
Citadel Advisors
7.7K$297K

Recent moves

20 transactions
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