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Equibles

ACK Asset Management LLC

Position in MTRN — MATERION Corp

CIK 1510940 GREENWICH, CT
Back to MTRN Full portfolio

Position in MTRN

as of Jun 30, 2026 · filed Aug 13, 2026
Position Value
$40,147,650
-$28,532,170 QoQ
Shares Held
135,000
-71.6% QoQ
Ownership
0.648%
of shares outstanding
% of Portfolio
4.85%
of 13F equity value
Holder Rank
#34
of 405 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in MTRN Over Time

Shares Held

Position Value (USD)

Position in Other Industrial Metals & Mining

Basic Materials · as of Jun 30, 2026

ACK Asset Management LLC holds $40,147,650 across 1 Other Industrial Metals & Mining name. MTRN ranks #1 (100.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 MTRN
MATERION Corp
This page 		135,000 $40,147,650

All Filings in MTRN

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $40,147,650 135,000
2026-03-31 $68,679,820 474,800
2025-12-31 $59,027,136 474,800
2025-09-30 $63,401,088 524,800
2025-06-30 $41,653,376 524,800
2025-03-31 $37,470,720 459,200
2024-12-31 $48,925,824 494,800
2024-09-30 $56,545,230 505,500
2024-06-30 $54,659,715 505,500
2024-03-31 $63,305,875 480,500
2023-12-31 $62,527,465 480,500
2023-09-30 $48,967,755 480,500
2023-06-30 $54,873,100 480,500
2023-03-31 $55,738,000 480,500
2022-12-31 $45,111,405 515,500
2022-09-30 $33,576,000 419,700
2022-06-30 $30,944,481 419,700
2022-03-31 $35,985,078 419,700
2021-12-31 $38,155,100 415,000
2021-09-30 $23,632,752 344,300
2021-06-30 $23,358,500 310,000
2021-03-31 $17,884,800 270,000
2020-12-31 $10,918,422 171,350
2020-09-30 $9,477,264 182,150
2020-06-30 $12,224,212 198,800
2020-03-31 $1,225,350 35,000