Who owns Materion Corporation (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-Q1 13F filings (latest filed 2026-05-22). 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 2025-Q4 and 2026-Q1: 106 added or opened and 34 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 2025-Q4 and 2026-Q1, across 333 tracked filers holding MTRN, 162 increased or opened the position and 143 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
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 2025-Q4 and 2026-Q1 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 26
- VANGUARD PORTFOLIO MANAGEMENT LLC$195M
- VANGUARD CAPITAL MANAGEMENT LLC$134M
- Capital World Investors$60M
- VANGUARD FIDUCIARY TRUST CO$20M
- Ceredex Value Advisors LLC$14M
- Qube Research & Technologies Ltd$9M
Full exits 9
- VANGUARD GROUP INC$271M
- F/m Investments LLC$4M
- SG Americas Securities, LLC$4M
- Jackson Creek Investment Advisors LLC$2M
- SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC$1M
- COMERICA BANK$891K
Largest adds
- AMERICAN CENTURY COMPANIES INC$63M
- Fisher Asset Management, LLC$46M
- STATE STREET CORP$42M
- Invesco Ltd.$14M
- Nuveen, LLC$12M
- GEODE CAPITAL MANAGEMENT, LLC$12M
Largest trims
- Capital Research Global Investors$121M
- BlackRock, Inc.$84M
- Trigran Investments, Inc.$9M
- INTECH INVESTMENT MANAGEMENT LLC$7M
- Concentric Capital Strategies, LP$6M
- BARCLAYS PLC$3M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 2,258,866 | $327M | 11.0% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 1,349,933 | $195M | 6.6% | 2026-Q1 |
| STATE STREET CORP added | 1,328,204 | $192M | 6.5% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 927,858 | $134M | 4.5% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 885,167 | $128M | 4.3% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 882,684 | $128M | 4.3% | 2026-Q1 |
| Capital Research Global Investors trimmed | 789,873 | $114M | 3.8% | 2026-Q1 |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC trimmed | 529,841 | $77M | 2.6% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 503,968 | $73M | 2.5% | 2026-Q1 |
| ACK Asset Management LLC | 474,800 | $69M | 2.3% | 2026-Q1 |
| Fisher Asset Management, LLC added | 442,005 | $64M | 2.2% | 2026-Q1 |
| MORGAN STANLEY trimmed | 424,478 | $61M | 2.1% | 2026-Q1 |
| Capital World Investors new | 415,000 | $60M | 2.0% | 2026-Q1 |
| SEGALL BRYANT & HAMILL, LLC trimmed | 334,337 | $48M | 1.6% | 2026-Q1 |
| Trigran Investments, Inc. trimmed | 333,985 | $48M | 1.6% | 2026-Q1 |
| Harvey Partners, LLC trimmed | 293,121 | $42M | 1.4% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 292,544 | $42M | 1.4% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 292,598 | $41M | 1.4% | 2026-Q1 |
| Copeland Capital Management, LLC trimmed | 265,247 | $38M | 1.3% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. trimmed | 260,504 | $38M | 1.3% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 247,777 | $36M | 1.2% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 219,050 | $32M | 1.1% | 2026-Q1 |
| GAMCO INVESTORS, INC. ET AL trimmed | 191,240 | $28M | 0.9% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 183,416 | $25M | 0.8% | 2026-Q1 |
| KENNEDY CAPITAL MANAGEMENT LLC added | 165,989 | $24M | 0.8% | 2026-Q1 |
| Aberdeen Group plc trimmed | 164,434 | $24M | 0.8% | 2026-Q1 |
| Invesco Ltd. added | 158,678 | $23M | 0.8% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 152,480 | $22M | 0.7% | 2026-Q1 |
| Granahan Investment Management, LLC added | 144,476 | $21M | 0.7% | 2026-Q1 |
| Nuveen, LLC added | 143,207 | $21M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 136,358 | $20M | 0.7% | 2026-Q1 |
| SCHRODER INVESTMENT MANAGEMENT GROUP trimmed | 131,748 | $18M | 0.6% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 120,164 | $17M | 0.6% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 118,569 | $17M | 0.6% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 116,842 | $17M | 0.6% | 2026-Q1 |
| ROYCE & ASSOCIATES LP trimmed | 103,540 | $15M | 0.5% | 2026-Q1 |
| First Eagle Investment Management, LLC added | 101,950 | $15M | 0.5% | 2026-Q1 |
| Ceredex Value Advisors LLC added | 97,500 | $14M | 0.5% | 2026-Q1 |
| PANAGORA ASSET MANAGEMENT INC added | 85,176 | $12M | 0.4% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 80,410 | $12M | 0.4% | 2026-Q1 |
| SEI INVESTMENTS CO added | 79,608 | $12M | 0.4% | 2026-Q1 |
| KING LUTHER CAPITAL MANAGEMENT CORP added | 78,147 | $11M | 0.4% | 2026-Q1 |
| Public Sector Pension Investment Board added | 74,230 | $11M | 0.4% | 2026-Q1 |
| GENDELL JEFFREY L | 71,296 | $10M | 0.3% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 65,468 | $9M | 0.3% | 2026-Q1 |
| HighTower Advisors, LLC added | 65,275 | $9M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 64,203 | $9M | 0.3% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 62,576 | $9M | 0.3% | 2026-Q1 |
| Fiera Capital Corp added | 58,612 | $8M | 0.3% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 57,349 | $8M | 0.3% | 2026-Q1 |
| UBS Group AG trimmed | 55,255 | $8M | 0.3% | 2026-Q1 |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC trimmed | 53,356 | $8M | 0.3% | 2026-Q1 |
| Legal & General Group Plc trimmed | 51,826 | $7M | 0.3% | 2026-Q1 |
| Lumbard & Kellner, LLC added | 51,581 | $7M | 0.3% | 2026-Q1 |
| Phocas Financial Corp. trimmed | 48,613 | $7M | 0.2% | 2026-Q1 |
| HEARTLAND ADVISORS INC trimmed | 48,352 | $7M | 0.2% | 2026-Q1 |
| ProShare Advisors LLC trimmed | 46,219 | $7M | 0.2% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 43,187 | $6M | 0.2% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 43,055 | $6M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 42,546 | $6M | 0.2% | 2026-Q1 |
| SailingStone Capital Partners LLC | 42,322 | $6M | 0.2% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 42,144 | $6M | 0.2% | 2026-Q1 |
| Swiss National Bank added | 41,000 | $6M | 0.2% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 38,073 | $6M | 0.2% | 2026-Q1 |
| Gilman Hill Asset Management, LLC trimmed | 36,940 | $5M | 0.2% | 2026-Q1 |
| Aptus Capital Advisors, LLC new | 35,624 | $5M | 0.2% | 2026-Q1 |
| Emerald Investment Advisers, LLC new | 34,813 | $5M | 0.2% | 2026-Q1 |
| BESSEMER GROUP INC trimmed | 31,410 | $5M | 0.2% | 2026-Q1 |
| Blackstone Inc. new | 31,044 | $4M | 0.2% | 2026-Q1 |
| MARTINGALE ASSET MANAGEMENT L P added | 30,818 | $4M | 0.1% | 2026-Q1 |
| ALGERT GLOBAL LLC trimmed | 29,830 | $4M | 0.1% | 2026-Q1 |
| CANADA LIFE ASSURANCE Co added | 29,708 | $4M | 0.1% | 2026-Q1 |
| CHATHAM CAPITAL GROUP, INC. trimmed | 29,506 | $4M | 0.1% | 2026-Q1 |
| Pathstone Holdings, LLC added | 25,028 | $4M | 0.1% | 2026-Q1 |
| Arosa Capital Management LP new | 25,000 | $4M | 0.1% | 2026-Q1 |
| Oliver Luxxe Assets LLC trimmed | 24,732 | $4M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 24,612 | $4M | 0.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 24,403 | $4M | 0.1% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 23,881 | $3M | 0.1% | 2026-Q1 |
| STIFEL FINANCIAL CORP trimmed | 23,180 | $3M | 0.1% | 2026-Q1 |
| SOROS FUND MANAGEMENT LLC new | 21,142 | $3M | 0.1% | 2026-Q1 |
| INTECH INVESTMENT MANAGEMENT LLC trimmed | 20,900 | $3M | 0.1% | 2026-Q1 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM trimmed | 20,763 | $3M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. added | 22,999 | $3M | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ trimmed | 19,060 | $3M | 0.1% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 18,433 | $3M | 0.1% | 2026-Q1 |
| RICE HALL JAMES & ASSOCIATES, LLC trimmed | 17,237 | $2M | 0.1% | 2026-Q1 |
| VANGUARD ASSET MANAGEMENT, Ltd new | 15,774 | $2M | 0.1% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND | 15,629 | $2M | 0.1% | 2026-Q1 |
| State of New Jersey Common Pension Fund D trimmed | 14,908 | $2M | 0.1% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed | 14,694 | $2M | 0.1% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 14,510 | $2M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 2,181,454 | $271M | 9.1% | 2025-Q4 stale |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. added | 673,007 | $55M | 1.8% | 2025-Q1 stale |
| NATIXIS ADVISORS, LLC trimmed | 110,024 | $9M | 0.3% | 2025-Q1 stale |
| F/m Investments LLC trimmed | 35,373 | $4M | 0.1% | 2025-Q4 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 50,193 | $4M | 0.1% | 2025-Q2 stale |
| SG Americas Securities, LLC added | 30,806 | $4M | 0.1% | 2025-Q4 stale |
| HWG Holdings LP new | 22,342 | $3M | 0.1% | 2025-Q3 stale |
| ICON ADVISERS INC/CO added | 19,800 | $2M | 0.1% | 2025-Q3 stale |
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.