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MTRN · MATERION Corp

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Market Cap
$5.09B
Shares
20.83M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 407
Total Value: $6,077,415,546
Total Shares: 20,443,716
Showing 1–100 of 416 holdings by value · page 1 of 5

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 407 13F filers · Δ vs Mar 31, 2026
Top Holder
17.0%
Sep 2023 → Jun 2026 · range 16.4% – 17.9%
+0.2 pts
Top 5
40.4%
Sep 2023 → Jun 2026 · range 39.2% – 51.0%
+1.2 pts
Top 10
53.8%
Sep 2023 → Jun 2026 · range 53.8% – 66.0%
−1.3 pts
HHI
502
Sep 2023 → Jun 2026 · range 502 – 704
Broadly held−7

Quarterly Activity

vs Mar 31, 2026
New
109
Increased
129
Decreased
125
Sold Out
36
Unchanged
44
Holder count: +73
Institutional value: +109.6%
Shares held: +1.9%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 416
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1104657 CUSIP 576690101 13F (30d) 273 filings 266 filers Visit website Investor relations