Who owns Metallus (MTUS)
Which tracked institutional funds hold MTUS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MTUS 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
48 tracked funds added or opened MTUS while 20 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
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
MTUS’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 MTUS more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in MTUS 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 187 tracked filers holding MTUS, 97 increased or opened the position and 95 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
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 MTUS 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 3
- CastleKnight Management LP$940K
- Y-Intercept (Hong Kong) Ltd$838K
- Qube Research & Technologies Ltd$616K
Full exits 13
- CSM Advisors, LLC$5M
- JANE STREET GROUP, LLC$5M
- South Dakota Investment Council$4M
- Manatuck Hill Partners, LLC$2M
- Covestor Ltd$2M
- Bastion Asset Management Inc.$1M
Largest adds
- BlackRock, Inc.$16M
- MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.$7M
- DIMENSIONAL FUND ADVISORS LP$6M
- CITADEL ADVISORS LLC$5M
- SYSTEMATIC FINANCIAL MANAGEMENT LP$5M
- AMERICAN CENTURY COMPANIES INC$4M
Largest trims
- DONALD SMITH & CO., INC.$6M
- SEI INVESTMENTS CO$2M
- MILLENNIUM MANAGEMENT LLC$2M
- Azarias Capital Management, L.P.$1M
- STATE STREET CORP$656K
- CHARLES SCHWAB INVESTMENT MANAGEMENT INC$637K
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 | 5,828,871 | $109M | 17.2% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 2,563,222 | $48M | 7.6% | 2026-Q2 |
| STATE STREET CORP trimmed | 2,412,194 | $45M | 7.1% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 2,007,353 | $38M | 5.9% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 1,674,270 | $31M | 4.9% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 1,566,944 | $29M | 4.6% | 2026-Q2 |
| SYSTEMATIC FINANCIAL MANAGEMENT LP added | 1,431,402 | $27M | 4.2% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 1,066,248 | $20M | 3.1% | 2026-Q2 |
| ROYCE & ASSOCIATES LP added | 988,434 | $18M | 2.9% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 929,925 | $17M | 2.7% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 905,633 | $17M | 2.7% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 726,328 | $14M | 2.1% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 675,374 | $13M | 2.0% | 2026-Q2 |
| DONALD SMITH & CO., INC. trimmed | 608,595 | $11M | 1.8% | 2026-Q2 |
| OpenArc Corporate Advisory, LLC added | 566,045 | $11M | 1.7% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 536,457 | $10M | 1.6% | 2026-Q2 |
| MORGAN STANLEY added | 513,898 | $10M | 1.5% | 2026-Q2 |
| Invesco Ltd. added | 473,856 | $9M | 1.4% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 462,261 | $9M | 1.4% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 430,455 | $8M | 1.3% | 2026-Q2 |
| Azarias Capital Management, L.P. trimmed | 419,507 | $8M | 1.2% | 2026-Q2 |
| NORTHERN TRUST CORP added | 407,644 | $8M | 1.2% | 2026-Q2 |
| EMERALD ADVISERS, LLC trimmed | 366,351 | $7M | 1.1% | 2026-Q2 |
| KENNEDY CAPITAL MANAGEMENT LLC trimmed | 334,036 | $6M | 1.0% | 2026-Q2 |
| Russell Investments Group, Ltd. trimmed | 325,722 | $6M | 1.0% | 2026-Q2 |
| Ballast Asset Management, LP trimmed | 283,657 | $5M | 0.8% | 2026-Q2 |
| Nuveen, LLC added | 239,570 | $4M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 237,898 | $4M | 0.7% | 2026-Q2 |
| Bank of New York Mellon Corp added | 230,297 | $4M | 0.7% | 2026-Q2 |
| GAMCO INVESTORS, INC. ET AL | 214,500 | $4M | 0.6% | 2026-Q2 |
| EMERALD MUTUAL FUND ADVISERS TRUST trimmed | 196,964 | $4M | 0.6% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 173,037 | $3M | 0.5% | 2026-Q2 |
| Skylands Capital, LLC trimmed | 158,800 | $3M | 0.5% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 145,151 | $3M | 0.4% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 141,258 | $3M | 0.4% | 2026-Q2 |
| Orchard Capital Management, LLC added | 136,651 | $3M | 0.4% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 133,263 | $2M | 0.4% | 2026-Q2 |
| KESTREL INVESTMENT MANAGEMENT CORP | 130,000 | $2M | 0.4% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 122,950 | $2M | 0.4% | 2026-Q2 |
| UBS Group AG added | 121,261 | $2M | 0.4% | 2026-Q2 |
| WEDGE CAPITAL MANAGEMENT L L P/NC trimmed | 120,949 | $2M | 0.4% | 2026-Q2 |
| GILDER GAGNON HOWE & CO LLC trimmed | 101,394 | $2M | 0.3% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH added | 100,195 | $2M | 0.3% | 2026-Q2 |
| BARCLAYS PLC trimmed | 96,006 | $2M | 0.3% | 2026-Q2 |
| ExodusPoint Capital Management, LP added | 95,530 | $2M | 0.3% | 2026-Q2 |
| Fisher Asset Management, LLC added | 93,210 | $2M | 0.3% | 2026-Q2 |
| CAMBIAR INVESTORS LLC trimmed | 92,343 | $2M | 0.3% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 91,962 | $2M | 0.3% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 91,049 | $2M | 0.3% | 2026-Q2 |
| Legal & General Group Plc trimmed | 87,316 | $2M | 0.3% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 83,941 | $2M | 0.2% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 83,400 | $2M | 0.2% | 2026-Q2 |
| WINTON GROUP Ltd trimmed | 79,857 | $1M | 0.2% | 2026-Q2 |
| Pathstone Holdings, LLC trimmed | 79,127 | $1M | 0.2% | 2026-Q2 |
| Atom Investors LP added | 71,903 | $1M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 71,200 | $1M | 0.2% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. added | 68,846 | $1M | 0.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 67,947 | $1M | 0.2% | 2026-Q2 |
| GABELLI FUNDS LLC | 64,000 | $1M | 0.2% | 2026-Q2 |
| Orion Porfolio Solutions, LLC added | 58,880 | $1M | 0.2% | 2026-Q2 |
| Quantinno Capital Management LP added | 58,376 | $1M | 0.2% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 54,957 | $898K | 0.1% | 2026-Q2 |
| Verdence Capital Advisors LLC trimmed | 53,314 | $996K | 0.2% | 2026-Q2 |
| CastleKnight Management LP trimmed | 50,300 | $940K | 0.1% | 2026-Q2 |
| SITTNER & NELSON, LLC | 47,845 | $894K | 0.1% | 2026-Q2 |
| Squarepoint Ops LLC added | 46,404 | $867K | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 45,792 | $856K | 0.1% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 45,723 | $855K | 0.1% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 45,334 | $847K | 0.1% | 2026-Q2 |
| Y-Intercept (Hong Kong) Ltd added | 44,823 | $838K | 0.1% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 42,517 | $802K | 0.1% | 2026-Q2 |
| Unison Advisors LLC | 42,215 | $789K | 0.1% | 2026-Q2 |
| EntryPoint Capital, LLC added | 39,968 | $747K | 0.1% | 2026-Q2 |
| STRS OHIO trimmed | 38,800 | $725K | 0.1% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC added | 37,956 | $709K | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 36,681 | $686K | 0.1% | 2026-Q2 |
| Inspire Investing, LLC added | 36,266 | $678K | 0.1% | 2026-Q2 |
| Boston Partners trimmed | 35,602 | $665K | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 34,195 | $639K | 0.1% | 2026-Q2 |
| Qube Research & Technologies Ltd trimmed | 32,954 | $616K | 0.1% | 2026-Q2 |
| Creative Planning trimmed | 32,857 | $614K | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC added | 32,427 | $606K | 0.1% | 2026-Q2 |
| Mutual Advisors, LLC | 32,119 | $600K | 0.1% | 2026-Q2 |
| KEYBANK NATIONAL ASSOCIATION/OH trimmed | 30,258 | $566K | 0.1% | 2026-Q2 |
| FIFTH THIRD BANCORP trimmed | 29,867 | $558K | 0.1% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 25,673 | $480K | 0.1% | 2026-Q2 |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 25,439 | $475K | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd | 23,936 | $447K | 0.1% | 2026-Q2 |
| LPL Financial LLC added | 23,452 | $438K | 0.1% | 2026-Q2 |
| DRW Securities, LLC added | 22,641 | $423K | 0.1% | 2026-Q2 |
| Dynamic Technology Lab Private Ltd added | 21,307 | $398K | 0.1% | 2026-Q2 |
| Hodges Capital Management Inc. added | 20,910 | $391K | 0.1% | 2026-Q2 |
| Steward Partners Investment Advisory, LLC new | 20,668 | $386K | 0.1% | 2026-Q2 |
| Illinois Municipal Retirement Fund trimmed | 19,305 | $361K | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 19,050 | $356K | 0.1% | 2026-Q2 |
| FIRST CITIZENS BANK & TRUST CO added | 18,633 | $348K | 0.1% | 2026-Q2 |
| ALGERT GLOBAL LLC trimmed | 18,302 | $342K | 0.1% | 2026-Q2 |
| PNC Financial Services Group, Inc. added | 17,984 | $336K | 0.1% | 2026-Q2 |
| Envestnet Portfolio Solutions, Inc. added | 17,884 | $334K | 0.1% | 2026-Q2 |
| STIFEL FINANCIAL CORP added | 17,415 | $325K | 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.