Who owns Materion (MTRN)
Which tracked institutional funds hold MTRN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MTRN company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on MTRN is one-sided between 2026-Q1 and 2026-Q2: 195 added or opened and 30 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
MTRN’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes MTRN more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in MTRN divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 369 tracked filers holding MTRN, 219 increased or opened the position and 173 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in MTRN between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 27
- WELLINGTON MANAGEMENT GROUP LLP$47M
- SAMLYN CAPITAL, LLC$45M
- EMERALD ADVISERS, LLC$28M
- AGF MANAGEMENT LTD$20M
- EMERALD MUTUAL FUND ADVISERS TRUST$18M
- Raiffeisen Bank International AG$18M
Full exits 25
- Capital World Investors$60M
- Ceredex Value Advisors LLC$14M
- Qube Research & Technologies Ltd$9M
- HighTower Advisors, LLC$9M
- SailingStone Capital Partners LLC$6M
- BESSEMER GROUP INC$5M
Largest adds
- BlackRock, Inc.$706M
- STATE STREET CORP$241M
- VANGUARD PORTFOLIO MANAGEMENT LLC$220M
- Capital Research Global Investors$183M
- VANGUARD CAPITAL MANAGEMENT LLC$145M
- GEODE CAPITAL MANAGEMENT, LLC$103M
Largest trims
- ACK Asset Management LLC$29M
- Blackstone Inc.$4M
- SOROS FUND MANAGEMENT LLC$3M
- Arosa Capital Management LP$2M
- CANADA PENSION PLAN INVESTMENT BOARD$370K
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 3,473,501 | $1.0B | 18.1% | 2026-Q2 |
| STATE STREET CORP added | 1,456,230 | $433M | 7.6% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 1,396,559 | $415M | 7.3% | 2026-Q2 |
| Capital Research Global Investors added | 1,000,456 | $298M | 5.2% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 937,553 | $279M | 4.9% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC trimmed | 616,020 | $183M | 3.2% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 591,006 | $176M | 3.1% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 577,952 | $172M | 3.0% | 2026-Q2 |
| Fisher Asset Management, LLC added | 495,230 | $147M | 2.6% | 2026-Q2 |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC trimmed | 446,069 | $133M | 2.3% | 2026-Q2 |
| MORGAN STANLEY trimmed | 411,140 | $122M | 2.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 329,282 | $98M | 1.7% | 2026-Q2 |
| SEGALL BRYANT & HAMILL, LLC trimmed | 313,988 | $93M | 1.6% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 281,712 | $84M | 1.5% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 270,972 | $81M | 1.4% | 2026-Q2 |
| NORTHERN TRUST CORP added | 264,657 | $79M | 1.4% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 245,405 | $73M | 1.3% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 235,842 | $70M | 1.2% | 2026-Q2 |
| Nuveen, LLC added | 228,570 | $68M | 1.2% | 2026-Q2 |
| Copeland Capital Management, LLC trimmed | 227,669 | $68M | 1.2% | 2026-Q2 |
| Harvey Partners, LLC trimmed | 220,068 | $65M | 1.1% | 2026-Q2 |
| Trigran Investments, Inc. trimmed | 219,877 | $65M | 1.1% | 2026-Q2 |
| Invesco Ltd. added | 200,119 | $60M | 1.0% | 2026-Q2 |
| GAMCO INVESTORS, INC. ET AL trimmed | 180,940 | $54M | 0.9% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 173,108 | $51M | 0.9% | 2026-Q2 |
| Bank of New York Mellon Corp added | 164,967 | $49M | 0.9% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP new | 158,335 | $47M | 0.8% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 154,353 | $46M | 0.8% | 2026-Q2 |
| SAMLYN CAPITAL, LLC new | 151,721 | $45M | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 149,106 | $44M | 0.8% | 2026-Q2 |
| KENNEDY CAPITAL MANAGEMENT LLC trimmed | 148,769 | $44M | 0.8% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC added | 147,752 | $44M | 0.8% | 2026-Q2 |
| ACK Asset Management LLC trimmed | 135,000 | $40M | 0.7% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 123,519 | $37M | 0.6% | 2026-Q2 |
| First Eagle Investment Management, LLC added | 119,300 | $35M | 0.6% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND added | 115,800 | $34M | 0.6% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 108,166 | $32M | 0.6% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP added | 103,996 | $31M | 0.5% | 2026-Q2 |
| EMERALD ADVISERS, LLC new | 92,808 | $28M | 0.5% | 2026-Q2 |
| SCHRODER INVESTMENT MANAGEMENT GROUP trimmed | 88,295 | $26M | 0.4% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 85,754 | $26M | 0.4% | 2026-Q2 |
| Aberdeen Group plc trimmed | 83,647 | $25M | 0.4% | 2026-Q2 |
| ROYCE & ASSOCIATES LP trimmed | 79,530 | $24M | 0.4% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 76,626 | $23M | 0.4% | 2026-Q2 |
| FMR LLC added | 75,705 | $23M | 0.4% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 71,497 | $21M | 0.4% | 2026-Q2 |
| GENDELL JEFFREY L | 71,296 | $21M | 0.4% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 69,840 | $21M | 0.4% | 2026-Q2 |
| Granahan Investment Management, LLC trimmed | 69,793 | $21M | 0.4% | 2026-Q2 |
| AGF MANAGEMENT LTD new | 68,093 | $20M | 0.4% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 65,217 | $19M | 0.3% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 64,753 | $19M | 0.3% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 63,136 | $19M | 0.3% | 2026-Q2 |
| Raiffeisen Bank International AG new | 62,109 | $18M | 0.3% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 61,472 | $18M | 0.3% | 2026-Q2 |
| EMERALD MUTUAL FUND ADVISERS TRUST new | 61,247 | $18M | 0.3% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 56,976 | $17M | 0.3% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 54,177 | $16M | 0.3% | 2026-Q2 |
| KING LUTHER CAPITAL MANAGEMENT CORP trimmed | 53,461 | $16M | 0.3% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 53,429 | $16M | 0.3% | 2026-Q2 |
| Lumbard & Kellner, LLC trimmed | 51,579 | $15M | 0.3% | 2026-Q2 |
| Legal & General Group Plc trimmed | 50,958 | $15M | 0.3% | 2026-Q2 |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC trimmed | 50,693 | $15M | 0.3% | 2026-Q2 |
| Phocas Financial Corp. trimmed | 46,207 | $14M | 0.2% | 2026-Q2 |
| UBS Group AG trimmed | 45,864 | $14M | 0.2% | 2026-Q2 |
| HAWK RIDGE CAPITAL MANAGEMENT LP new | 45,800 | $14M | 0.2% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 42,958 | $13M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 40,800 | $12M | 0.2% | 2026-Q2 |
| HEARTLAND ADVISORS INC trimmed | 40,550 | $12M | 0.2% | 2026-Q2 |
| Emerald Investment Advisers, LLC added | 36,480 | $11M | 0.2% | 2026-Q2 |
| Aptus Capital Advisors, LLC added | 35,821 | $11M | 0.2% | 2026-Q2 |
| Fiera Capital Corp trimmed | 34,369 | $10M | 0.2% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 33,140 | $10M | 0.2% | 2026-Q2 |
| ProShare Advisors LLC trimmed | 30,089 | $9M | 0.2% | 2026-Q2 |
| INTECH INVESTMENT MANAGEMENT LLC added | 27,704 | $8M | 0.1% | 2026-Q2 |
| CHATHAM CAPITAL GROUP, INC. trimmed | 27,575 | $8M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 27,199 | $4M | 0.1% | 2026-Q2 |
| Mawer Investment Management Ltd. new | 26,872 | $8M | 0.1% | 2026-Q2 |
| NORGES BANK added | 25,900 | $8M | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 25,354 | $8M | 0.1% | 2026-Q2 |
| Gilman Hill Asset Management, LLC trimmed | 25,140 | $7M | 0.1% | 2026-Q2 |
| Pathstone Holdings, LLC trimmed | 24,573 | $7M | 0.1% | 2026-Q2 |
| Informed Momentum Co LLC new | 24,334 | $7M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 23,942 | $7M | 0.1% | 2026-Q2 |
| STIFEL FINANCIAL CORP added | 23,739 | $7M | 0.1% | 2026-Q2 |
| MARTINGALE ASSET MANAGEMENT L P trimmed | 21,817 | $6M | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 21,248 | $6M | 0.1% | 2026-Q2 |
| Portolan Capital Management, LLC new | 20,860 | $6M | 0.1% | 2026-Q2 |
| Jupiter Topco LLC new | 17,993 | $5M | 0.1% | 2026-Q2 |
| RICE HALL JAMES & ASSOCIATES, LLC trimmed | 17,098 | $5M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 16,351 | $5M | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 16,148 | $5M | 0.1% | 2026-Q2 |
| PDT Partners, LLC new | 15,931 | $5M | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 15,929 | $5M | 0.1% | 2026-Q2 |
| Creative Planning added | 15,812 | $5M | 0.1% | 2026-Q2 |
| Advisors Asset Management, Inc. added | 15,595 | $5M | 0.1% | 2026-Q2 |
| BARCLAYS PLC added | 14,979 | $4M | 0.1% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 12,985 | $4M | 0.1% | 2026-Q2 |
| Oliver Luxxe Assets LLC trimmed | 12,671 | $4M | 0.1% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 12,224 | $4M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.