Materion Corporation (MTRN) Ownership
MTRN ownership summary
as of October 18, 2026- Institutions
- 99.5% of shares outstanding
- Insiders
- 1.72% of shares outstanding
- Shares outstanding
- 20.8M
- Float
- 20.6M shares available to trade
- Short interest
- 4.01% 608K shares short
- Days to cover
- 2.51 short interest down 1.8% vs prior month
- Institutions 99.50%
- Insiders 1.72%
MTRN top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 16.67% | 3.5M | $852.5M | +104,555 (+3.1%) | June 30, 2026 |
| 2 | State Street Corp | 6.99% | 1.5M | $357.4M | +128,026 (+9.6%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 6.70% | 1.4M | $342.8M | +46,626 (+3.5%) | June 30, 2026 |
| 4 | Capital Research Global Investors | 4.80% | 1.0M | $245.6M | +210,583 (+26.7%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 4.50% | 938K | $230.1M | +9,695 (+1.0%) | June 30, 2026 |
| 6 | American Century Companies Inc | 2.96% | 616K | $151.2M | −266,664 (−30.2%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 2.84% | 591K | $145.1M | +87,038 (+17.3%) | June 30, 2026 |
| 8 | Dimensional Fund Advisors, Inc. | 2.77% | 578K | $141.9M | −307,215 (−34.7%) | June 30, 2026 |
| 9 | Fisher Asset Management, LLC | 2.38% | 495K | $121.5M | +53,225 (+12.0%) | June 30, 2026 |
| 10 | Barrow Hanley Mewhinney & Strauss LLC | 2.14% | 446K | $109.5M | −83,772 (−15.8%) | June 30, 2026 |
| 11 | Morgan Stanley - Brokerage Accounts | 1.97% | 411K | $100.9M | −13,338 (−3.1%) | June 30, 2026 |
| 12 | T. Rowe Price Associates, Inc. | 1.58% | 329K | $80.8M | +304,879 (+1,249.4%) | June 30, 2026 |
| 13 | Segall Bryant & Hamill | 1.51% | 314K | $77.1M | −20,349 (−6.1%) | June 30, 2026 |
| 14 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 1.35% | 282K | $69.1M | +21,208 (+8.1%) | June 30, 2026 |
| 15 | Charles Schwab Investment Management Inc | 1.30% | 271K | $66.5M | −21,572 (−7.4%) | June 30, 2026 |
| 16 | Northern Trust Corp | 1.27% | 265K | $65.0M | +16,880 (+6.8%) | June 30, 2026 |
| 17 | Arnhold & S. Bleichroeder Advisers, LLC | 1.15% | 239K | $58.6M | +136,650 (+134.0%) | June 30, 2026 |
| 18 | The Goldman Sachs Group Inc | 1.13% | 236K | $57.9M | +119,000 (+101.8%) | June 30, 2026 |
| 19 | Nuveen, LLC | 1.10% | 229K | $56.1M | +85,363 (+59.6%) | June 30, 2026 |
| 20 | Harvey Partners LLC | 1.06% | 220K | $54.0M | −73,053 (−24.9%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 13 holders added 1.3M shares and 7 cut 786K.
MTRN top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Small-Cap ETF | 5.96% | 1.2M | $304.6M | +267 (+0.0%) | September 30, 2026 |
| 2 | American Funds SMALLCAP World A | 4.68% | 974K | $239.1M | — | September 30, 2026 |
| 3 | Stt Strt®SPDR®S&P®Mtls &MngETF | 3.70% | 771K | $189.3M | +7,808 (+1.0%) | September 30, 2026 |
| 4 | Vanguard MStar Total Stk Mkt Idx Invest | 3.18% | 662K | $162.5M | −976 (−0.1%) | August 31, 2026 |
| 5 | iShares Russell 2000 ETF | 2.61% | 544K | $133.4M | −6,272 (−1.1%) | September 30, 2026 |
| 6 | Vanguard Small Cap Index | 2.25% | 469K | $115.0M | −10,331 (−2.2%) | September 30, 2026 |
| 7 | Vanguard MStar Small Cap Value Index | 1.46% | 305K | $74.9M | +1,231 (+0.4%) | September 30, 2026 |
| 8 | Fidelity Small Cap Index | 1.10% | 229K | $56.3M | +1,957 (+0.9%) | July 31, 2026 |
| 9 | iShares Russell 2000 Growth ETF | 0.94% | 196K | $48.2M | −249 (−0.1%) | September 30, 2026 |
| 10 | American Century Small Cap Growth Inv | 0.93% | 194K | $47.6M | −2,396 (−1.2%) | September 30, 2026 |
| 11 | State Street SPDR Port S&P 600 Sm CpETF | 0.91% | 190K | $46.5M | — | September 30, 2026 |
| 12 | 1290 VT GAMCO Small Company Value IB | 0.82% | 172K | $42.1M | −400 (−0.2%) | August 31, 2026 |
| 13 | Fidelity Enhanced Small Cap Core ETF | 0.63% | 132K | $32.3M | +276 (+0.2%) | September 30, 2026 |
| 14 | Vanguard Tax-Managed Small Cap Adm | 0.63% | 131K | $32.2M | — | September 30, 2026 |
| 15 | Invesco S&P SmallCap Momentum ETF | 0.62% | 130K | $31.9M | — | September 30, 2026 |
| 16 | Vanguard Russell 2000 ETF | 0.59% | 122K | $30.0M | +1,375 (+1.1%) | September 30, 2026 |
| 17 | Vanguard Dividend Appreciation ETF | 0.57% | 118K | $28.9M | +100 (+0.1%) | September 30, 2026 |
| 18 | American Beacon Small Cp Val R5 | 0.55% | 116K | $28.4M | — | August 31, 2026 |
| 19 | Schwab US Small-Cap ETF™ | 0.53% | 110K | $26.9M | +72 (+0.1%) | September 30, 2026 |
| 20 | iShares S&P Small-Cap 600 Growth ETF | 0.51% | 106K | $26.1M | — | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
MTRN insider transactions
latest 14| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-03 | Gregory R Chemnitz | Sell | $157.32 | 4,517 | $710,614 |
| 2026-03-03 | Melissa A Fashinpaur | Sell | $160.00 | 309 | $49,440 |
| 2026-03-03 | Shelly Marie Chadwick | Sell | $160.06 | 2,539 | $406,392 |
| 2026-02-23 | Shelly Marie Chadwick | Sell | $146.13 | 8,976 | $1.3M |
| 2026-02-18 | Jugal K Vijayvargiya | Sell | $156.86 | 12,245 | $1.9M |
| 2026-02-17 | Gregory R Chemnitz | Sell | $157.09 | 4,000 | $628,360 |
| 2026-02-17 | Jugal K Vijayvargiya | Sell | $148.56 | 12,963 | $1.9M |
| 2026-02-17 | Vinod M Khilnani | Sell | $148.86 | 4,000 | $595,440 |
| 2025-11-04 | Gregory R Chemnitz | Sell | $113.23 | 864 | $97,831 |
| 2025-08-11 | N Mohan Reddy | Sell | $105.45 | 1,155 | $121,795 |
| 2025-08-04 | Gregory R Chemnitz | Sell | $105.17 | 3,000 | $315,510 |
| 2025-08-04 | Melissa A. Fashinpaur | Sell | $105.34 | 1,140 | $120,088 |
| 2025-05-05 | Gregory R Chemnitz | Sell | $80.45 | 2,000 | $160,900 |
| 2025-05-05 | Gregory R Chemnitz | Sell | $80.45 | 2,000 | $160,900 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
MTRN shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns MTRN
Institutional investors own 99.5% of Materion's shares and insiders 1.72%. The largest holder is BlackRock Inc with 16.67% of the shares (3.5M), as of June 30, 2026. Among the top 20 institutions, 13 added shares and 7 reduced their stake in the latest filings. Short interest is 4.01% of the float, or 2.51 days of average trading volume. The share count rose 2.3% since 2014.
Related: MTRN analyst forecast, MTRN key metrics, MTRN dividend history. See the MTRN stock overview for the latest quote and news.
MTRN ownership FAQ
Who owns the most Materion stock?
The largest shareholders of Materion are BlackRock Inc (16.67%), State Street Corp (6.99%), Vanguard Portfolio Management, LLC (6.70%), Capital Research Global Investors (4.80%), Vanguard Capital Management, LLC (4.50%).
What percentage of Materion is owned by institutions?
Institutions hold 99.5% of Materion's shares outstanding; insiders hold 1.72%.
Which funds own Materion?
The largest fund holders of Materion are iShares Core S&P Small-Cap ETF (5.96%), American Funds SMALLCAP World A (4.68%), Stt Strt®SPDR®S&P®Mtls &MngETF (3.70%), Vanguard MStar Total Stk Mkt Idx Invest (3.18%), iShares Russell 2000 ETF (2.61%).
What is Materion's short interest?
608K shares of Materion were sold short, 4.01% of the float; at the average daily volume it would take 2.51 days to cover.
Are insiders buying or selling Materion?
Of the latest 14 reported insider transactions in Materion (since May 5, 2025), 0 were purchases and 14 were sales.
How many shares of Materion are outstanding?
Materion has 20.8M shares outstanding, of which 20.6M are in the public float.