Materion Corporation (MTRN) ownership: Top institutional holder: BlackRock, Inc. ($487.32M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 3368946.00 | $487.32M | 2026-03-31 |
| VANGUARD GROUP INC | 2344101.00 | $291.42M | 2025-12-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1349933.00 | $195.27M | 2026-03-31 |
| STATE STREET CORP | 1328204.00 | $192.12M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 927858.00 | $134.21M | 2026-03-31 |
| DIMENSIONAL FUND ADVISORS LP | 885167.00 | $128.03M | 2026-03-31 |
| AMERICAN CENTURY COMPANIES INC | 882684.00 | $127.68M | 2026-03-31 |
| Capital Research Global Investors | 789873.00 | $114.26M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-08-10 | |
| Sell | null | 2026-08-07 | |
| Sell | null | 2026-08-07 | |
| Sell | null | 2026-08-07 | |
| Sell | null | 2026-08-07 | |
| Sell | null | 2026-08-07 | |
| Sell | null | 2026-08-07 | |
| Sell | null | 2026-08-07 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.