MATERION Corp MTRN
CIK 0001104657 · CUSIP 576690101
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | BlackRock, Inc. CIK 2012383 · View history | $395.34M 3,272,432 shares | 0.01% | -55.33K(-1.70%)Reduced | SEC filing ↗ Nov 12, 2025 | ▾ |
| 02 | VANGUARD GROUP INC CIK 102909 · View history | $284.63M 2,355,979 shares | 0.00% | -29.88K(-1.30%)Reduced | SEC filing ↗ Nov 7, 2025 | ▾ |
| 03 | Capital Research Global Investors CIK 1422848 · View history | $230.95M 1,911,665 shares | 0.04% | 0(0.00%)Unchanged | SEC filing ↗ Nov 13, 2025 | ▾ |
| 04 | STATE STREET CORP CIK 93751 · View history | $161.55M 1,337,260 shares | 0.01% | +38.30K(+2.90%)Added | SEC filing ↗ Nov 14, 2025 | ▾ |
| 05 | DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history | $121.16M 1,002,952 shares | 0.03% | -7.54K(-0.70%)Reduced | SEC filing ↗ Nov 12, 2025 | ▾ |
| 06 | BARROW HANLEY MEWHINNEY & STRAUSS LLC CIK 313028 · View history | $73.01M 604,350 shares | 0.23% | -35.85K(-5.60%)Reduced | SEC filing ↗ Nov 13, 2025 | ▾ |
| 07 | ACK Asset Management LLC CIK 1510940 · View history | $63.40M 524,800 shares | 7.93% | 0(0.00%)Unchanged | SEC filing ↗ Nov 14, 2025 | ▾ |
| 08 | Trigran Investments, Inc. CIK 1336800 · View history | $60.13M 497,729 shares | 10.90% | -301.02K(-37.70%)Reduced | SEC filing ↗ Nov 12, 2025 | ▾ |
| 09 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $59.19M 489,841 shares | 0.00% | +2.65K(+0.50%)Added | SEC filing ↗ Nov 12, 2025 | ▾ |
| 10 | MORGAN STANLEY CIK 895421 · Amended · View history | $46.25M 382,869 shares | 0.00% | +168.48K(+78.60%)Added | SEC filing ↗ May 27, 2026 | ▾ |
| 11 | Copeland Capital Management, LLC CIK 1541743 · View history | $45.04M 372,848 shares | 0.94% | -92.90K(-19.90%)Reduced | SEC filing ↗ Oct 17, 2025 | ▾ |
| 12 | AMERICAN CENTURY COMPANIES INC CIK 748054 · View history | $44.12M 365,212 shares | 0.02% | +126.79K(+53.20%)Added | SEC filing ↗ Nov 12, 2025 | ▾ |
| 13 | SEGALL BRYANT & HAMILL, LLC CIK 1006378 · View history | $42.22M 349,500 shares | 0.56% | +78.35K(+28.90%)Added | SEC filing ↗ Nov 12, 2025 | ▾ |
| 14 | Harvey Partners, LLC CIK 1406484 · View history | $38.42M 318,000 shares | 3.49% | +318.00KNew | SEC filing ↗ Nov 14, 2025 | ▾ |
| 15 | ROYAL BANK OF CANADA CIK 1000275 · View history | $37.17M 307,679 shares | 0.01% | -36.19K(-10.50%)Reduced | SEC filing ↗ Nov 14, 2025 | ▾ |
| 16 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history | $36.72M 303,950 shares | 0.01% | +14.48K(+5.00%)Added | SEC filing ↗ Nov 10, 2025 | ▾ |
| 17 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. CIK 1705339 · View history | $34.66M 286,913 shares | 0.06% | +4.47K(+1.60%)Added | SEC filing ↗ Nov 14, 2025 | ▾ |
| 18 | NORTHERN TRUST CORP CIK 73124 · View history | $32.79M 271,450 shares | 0.00% | -8.24K(-2.90%)Reduced | SEC filing ↗ Nov 14, 2025 | ▾ |
| 19 | Aberdeen Group plc CIK 1716774 · View history | $27.07M 228,353 shares | 0.04% | +13.69K(+6.40%)Added | SEC filing ↗ Nov 7, 2025 | ▾ |
| 20 | GAMCO INVESTORS, INC. ET AL CIK 807249 · View history | $23.58M 195,150 shares | 0.23% | +8.00K(+4.30%)Added | SEC filing ↗ Nov 12, 2025 | ▾ |
Showing 20 / 302 institutions. The complete set is available through the API.
Coverage & totals by quarter
Reporting institutions by quarter
Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.
Explore all 302 reporting institutions.
This page includes 20 of 302 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.
- Download CSV
- Earlier quarters
- Advanced screening & filtering
- API & AI access
＋ New accounts get free API credits to explore data beyond ownership filings.
For AI agents & developers
The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 302 reporting institutions; totals use the complete disclosed data.
Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.
MCP https://api.akkrudata.ai/mcp
akkru_institutional_holdings
{"action":"holders","cusip":"576690101","quarter":"2025Q3","type":"positions","page_size":100}Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.
- MCP endpoint
- https://api.akkrudata.ai/mcp
- API / MCP / CLI documentation
- /documents
- llms.txt
- /llms.txt
Sources, coverage & how to read this data
Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.