FRONTIER CAPITAL MANAGEMENT CO LLC

Position in MLI — Mueller Industries Inc

CIK 351173 Boston, MA

Position in MLI

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$33,064,359

+$1,769,675 QoQ

Shares Held

537,938

-4.8% QoQ

Ownership

0.243%

of shares outstanding

% of Portfolio

0.31%

of 13F equity value

Holder Rank

#50

of 740 holders

Holding Since

Dec 2025

3 quarters on record

Voting authority Sole 93% Shared 0% None 7%

Industrials · as of Jun 30, 2026

FRONTIER CAPITAL MANAGEMENT CO LLC holds $206,916,938 across 4 Metal Fabrication names. MLI ranks #4 (16.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ATI	Ati Inc	419,968	$82,775,692
2	CRS	Carpenter Technology Corp	80,488	$49,648,217
3	RYZ	Ryerson Holding Corp	1,683,408	$41,428,670
4	MLI	Mueller Industries Inc This page	537,938	$33,064,359

3 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$33,064,359	268,969	-4.8%	Shares	Sole	2026-08-14
2026-03-31	$31,294,684	282,443	+32.2%	Shares	Sole	2026-05-15
2025-12-31	$24,534,137	213,712	—	Shares	Sole	2026-02-17
No filing history on record for this holder in this stock.