ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

Position in MSB — Mesabi Trust

CIK 1164508 BOSTON, MA

Position in MSB

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$495,621

-$55,099 QoQ

Shares Held

15,734

+10.1% QoQ

Ownership

0.120%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2025

5 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Basic Materials · as of Mar 31, 2026

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $12,805,415 across 5 Steel names. MSB ranks #5 (3.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	MT	ArcelorMittal	75,105	$3,903,957
2	TX	Ternium S.A.	97,202	$3,902,660
3	NWPX	NWPX Infrastructure, Inc.	42,886	$3,339,103
4	WS	Worthington Steel, Inc.	38,355	$1,164,074
5	MSB	Mesabi Trust This page	15,734	$495,621

5 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$495,621	15,734	+10.1%	Shares	Defined	2026-05-14
2025-12-31	$550,720	14,297	-14.3%	Shares	Defined	2026-02-13
2025-09-30	$488,516	16,690	-13.1%	Shares	Defined	2025-11-13
2025-06-30	$460,319	19,212	0.0%	Shares	Defined	2025-08-13
2025-03-31	$522,566	19,212	—	Shares	Defined	2025-05-14
No filing history on record for this holder in this stock.