MTUS · Metallus Inc. · Shareholders & Ownership
One customer — 10.6% of revenue (the year ended December 31, 2025)
“For the year ended December 31, 2025, one customer individually comprised greater than 10% of net sales. This customer represented 10.6% of net sales.”
Every disclosed holder of MTUS in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns MTUS
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positionsNo chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 35,438,886 | 85.50% |
| Insiders (Forms 3, 4, 5) | 6,335,240 | 15.28% |
| 13D/G-only blocks | 0 | 0.00% |
| Remaining | 324,842 | -0.78% |
| Registered funds (N-PORT, not summed) | 19,632,108 | 47.36% |
Shares outstanding: 41,449,284, the issuer's latest cover-page count restated onto today's split basis.
Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of MTUS
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
5,828,871 | ||
| 1.1 |
iShares Core S&P Small-Cap ETF
Fund
S000004313 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
2,157,337 | ||
| 1.2 |
iShares Russell 2000 ETF
Fund
S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
959,208 | ||
| 1.3 |
iShares Russell 2000 Value ETF
Fund
S000004342 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
342,357 | ||
| 1.4 |
iShares S&P Small-Cap 600 Value ETF
Fund
S000004316 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
310,266 | ||
| 1.5 |
iShares Micro-Cap ETF
Fund
S000004439 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
122,900 | ||
| 2 |
|
4,285,026 | ||
| 3 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,563,222 | ||
| 3.1 |
U.S. SMALL CAP VALUE PORTFOLIO
Fund
S000000987 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
637,342 | ||
| 3.2 |
U.S. Targeted Value Portfolio
Fund
S000000970 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
311,026 | ||
| 3.3 |
Dimensional US Small Cap Value ETF
Fund
S000075151 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
243,107 | ||
| 3.4 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
237,776 | ||
| 3.5 |
Dimensional U.S. Targeted Value ETF
Fund
S000070901 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
215,074 | ||
| 4 |
|
2,412,194 | ||
| 4.1 |
State Street(R) SPDR(R) S&P(R) Metals & Mining ETF
Fund
S000012333 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
965,321 | ||
| 4.2 |
State Street(R) SPDR(R) Portfolio S&P 600(TM) Small Cap ETF
Fund
S000041317 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
327,741 | ||
| 4.3 |
State Street(R) SPDR(R) S & P 600(TM) Small Cap Value ETF
Fund
S000006974 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
188,146 | ||
| 4.4 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
12,814 | ||
| 4.5 |
State Street(R) SPDR(R) Portfolio S&P 1500(R) Composite Stock Market ETF
Fund
S000006973 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
4,914 | ||
| 5 |
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.
13F
CIK 1705339 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,007,353 | ||
| 5.1 |
Global X U.S. Infrastructure Development ETF
Fund
S000056509 · Registered fund · May 31, 2026
GLOBAL X FUNDS, not summed
|
1,832,013 | ||
| 5.2 |
Global X Russell 2000 ETF
Fund
S000085029 · Registered fund · Jul 31, 2026
GLOBAL X FUNDS, not summed
|
17,530 | ||
| 6 |
AMERICAN CENTURY COMPANIES INC
13F
CIK 748054 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,674,270 | ||
| 7 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,566,944 | ||
| 8 |
SYSTEMATIC FINANCIAL MANAGEMENT LP
13F
CIK 1085936 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,431,402 | ||
| 9 |
Avantis U.S. Small Cap Value ETF
Fund
S000066459 · Registered fund · May 31, 2026
American Century ETF Trust, not summed
|
1,408,372 | ||
| 10 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
1,120,247 | ||
| 11 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,066,248 | ||
| 12 |
ROYCE & ASSOCIATES LP
13F
CIK 906304 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
988,434 | ||
| 12.1 |
Royce Small-Cap Opportunity Fund
Fund
S000009512 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
|
315,342 | ||
| 12.2 |
Royce Small-Cap Special Equity Fund
Fund
S000009513 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
|
290,000 | ||
| 12.3 |
Royce Small-Cap Fund
Fund
S000009507 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
|
23,765 | ||
| 13 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
929,925 | ||
| 14 |
RENAISSANCE TECHNOLOGIES LLC
13F
CIK 1037389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
905,633 | ||
| 15 |
AMERIPRISE FINANCIAL INC
13F
CIK 820027 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
726,328 | ||
| 15.1 |
Columbia Small Cap Value Discovery Fund
Fund
S000012102 · Registered fund · Jul 31, 2026
COLUMBIA FUNDS SERIES TRUST I, not summed
|
469,628 | ||
| 15.2 |
Columbia Variable Portfolio - Small Cap Value Discovery Fund
Fund
S000012561 · Registered fund · Jun 30, 2026
COLUMBIA FUNDS VARIABLE INSURANCE TRUST, not summed
|
84,978 | ||
| 15.3 |
Columbia Small Cap Index Fund
Fund
S000010827 · Registered fund · May 31, 2026
COLUMBIA FUNDS SERIES TRUST, not summed
|
53,468 | ||
| 16 |
|
709,858 | ||
| 17 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
675,374 | ||
| 17.1 |
Schwab Fundamental U.S. Small Company ETF
Fund
S000040878 · Registered fund · Aug 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
258,884 | ||
| 17.2 |
Schwab U.S. Small-Cap ETF
Fund
S000026636 · Registered fund · Aug 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
169,453 | ||
| 17.3 |
Schwab Small-Cap Index Fund
Fund
S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
88,525 | ||
| 17.4 |
Schwab Fundamental U.S. Small Company Index Fund
Fund
S000016767 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
67,584 | ||
| 17.5 |
Schwab Total Stock Market Index Fund
Fund
S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
23,743 | ||
| 18 |
OpenArc Corporate Advisory, LLC
13F
CIK 2111345 · Registered investment adviser · Sep 30, 2026
|
644,874 | ||
| 19 |
ACADIAN ASSET MANAGEMENT LLC
13F
CIK 916542 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
638,533 | ||
| 20 |
DONALD SMITH & CO., INC.
13F
CIK 814375 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
608,595 | ||
| 21 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
536,457 | ||
| 22 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
513,898 | ||
| 22.1 |
E*TRADE No Fee Total Market Index Fund
Fund
S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
|
123 | ||
| 23 |
Invesco Ltd.
13F
CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
473,856 | ||
| 23.1 |
Invesco S&P SmallCap Value with Momentum ETF
Fund
S000003025 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
245,231 | ||
| 23.2 |
Invesco S&P SmallCap 600 Revenue ETF
Fund
S000064596 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
|
80,964 | ||
| 23.3 |
Invesco S&P Smallcap 600 Pure Value ETF
Fund
S000060800 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
68,847 | ||
| 23.4 |
Invesco RAFI US 1500 Small-Mid ETF
Fund
S000013120 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
44,316 | ||
| 23.5 |
Invesco S&P SmallCap Materials ETF
Fund
S000028302 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
|
9,884 | ||
| 24 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
462,261 | ||
| 25 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
430,455 | ||
| 25.1 |
Goldman Sachs Small Cap Value Insights Fund
Fund
S000014929 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
66,244 | ||
| 25.2 |
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund
S000048296 · Registered fund · Aug 31, 2026
Goldman Sachs ETF Trust, not summed
|
23,243 | ||
| 25.3 |
Goldman Sachs Small Cap Equity Insights Fund
Fund
S000009329 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
8,435 | ||
| 25.4 |
Goldman Sachs Absolute Return Tracker Fund
Fund
S000020314 · Registered fund · Aug 31, 2026
GOLDMAN SACHS TRUST, not summed
|
7,986 | ||
| 26 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
409,839 | ||
| 27 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
407,644 | ||
| 27.1 |
Small Cap Index Fund
Fund
S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
19,047 | ||
| 28 |
CSM Advisors, LLC
13F
CIK 1863523 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
386,007 | ||
| 29 |
EMERALD ADVISERS, LLC
13F
CIK 1015083 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
366,351 | ||
| 30 |
KENNEDY CAPITAL MANAGEMENT LLC
13F
CIK 884589 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
334,036 | ||
| 31 |
Russell Investments Group, Ltd.
13F
CIK 1692234 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
325,722 | ||
| 31.1 |
U.S. Small Cap Equity Fund
Fund
S000001586 · Registered fund · Jul 31, 2026
RUSSELL INVESTMENT CO, not summed
|
84,235 | ||
| 31.2 |
Tax-Managed U.S. Mid & Small Cap Fund
Fund
S000001571 · Registered fund · Jul 31, 2026
RUSSELL INVESTMENT CO, not summed
|
22,790 | ||
| 31.3 |
U.S. Small Cap Equity Fund
Fund
S000006864 · Registered fund · Jun 30, 2026
RUSSELL INVESTMENT FUNDS, not summed
|
22,059 | ||
| 31.4 |
Russell Investments U.S. Small Cap Equity ETF
Fund
S000089990 · Registered fund · Jun 30, 2026
Russell Investments Exchange Traded Funds, not summed
|
7,095 | ||
| 32 |
Ballast Asset Management, LP
13F
CIK 1998389 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
283,657 | ||
| 33 |
VANGUARD TAX-MANAGED SMALL-CAP FUND
Fund
S000004387 · Registered fund · Jun 30, 2026
VANGUARD TAX-MANAGED FUNDS, not summed
|
276,189 | ||
| 34 |
VANGUARD STRATEGIC EQUITY FUND
Fund
S000002593 · Registered fund · Jun 30, 2026
VANGUARD HORIZON FUNDS, not summed
|
252,060 | ||
| 35 |
|
239,570 | ||
| 35.1 |
Nuveen Small Cap Blend Index Fund
Fund
S000005367 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
48,554 | ||
| 35.2 |
Nuveen Equity Index Fund
Fund
S000005360 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
33,895 | ||
| 35.3 |
Nuveen ESG Small-Cap ETF
Fund
S000055815 · Registered fund · Jul 31, 2026
NuShares ETF Trust, not summed
|
33,751 | ||
| 35.4 |
TIAA Separate Account VA-1 - Stock Index Account
Fund
S000005098 · Registered fund · Jun 30, 2026
TIAA Separate Account VA-1, not summed
|
1,535 | ||
| 35.5 |
Nuveen Life Stock Index Fund
Fund
S000005094 · Registered fund · Jun 30, 2026
TIAA-CREF Life Funds, not summed
|
717 | ||
| 36 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
237,898 | ||
| 37 |
Bank of New York Mellon Corp
13F
CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
230,297 | ||
| 38 |
GAMCO INVESTORS, INC. ET AL
13F
CIK 807249 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
214,500 | ||
| 39 |
|
214,077 | ||
| 40 |
1290 VT GAMCO Small Company Value Portfolio
Fund
S000009151 · Registered fund · Jun 30, 2026
EQ Advisors Trust, not summed
|
207,000 | ||
| 41 |
BALLAST SMALL/MID CAP ETF
Fund
S000070046 · Registered fund · Jun 30, 2026
Unified Series Trust, not summed
|
199,576 | ||
| 42 |
EMERALD MUTUAL FUND ADVISERS TRUST
13F
CIK 1352895 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
196,964 | ||
| 42.1 |
Emerald Growth Fund
Fund
S000036390 · Registered fund · Apr 30, 2026
FINANCIAL INVESTORS TRUST, not summed
|
144,547 | ||
| 43 |
VANGUARD RUSSELL 2000 INDEX FUND
Fund
S000030003 · Registered fund · May 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
|
186,790 | ||
| 44 |
South Dakota Investment Council
13F
CIK 1538846 · Pension or benefit plan · Jun 30, 2026
carried, not yet filed for the newest quarter
|
186,577 | ||
| 45 |
Azarias Capital Management, L.P.
13F
CIK 1625279 · Investment adviser · Sep 30, 2026
|
174,422 | ||
| 46 |
PRINCIPAL FINANCIAL GROUP INC
13F
CIK 1126328 · Insurance company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
173,037 | ||
| 46.1 |
SmallCap S&P 600 Index Fund
Fund
S000007203 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
|
26,376 | ||
| 46.2 |
SmallCap Value Fund II
Fund
S000007169 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
|
2,423 | ||
| 47 |
Skylands Capital, LLC
13F
CIK 1299910 · Registered investment adviser · Sep 30, 2026
|
157,800 | ||
| 48 |
|
151,818 | ||
| 49 |
SEI INVESTMENTS CO
13F
CIK 350894 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
145,151 | ||
| 49.1 |
New Covenant Growth Fund
Fund
S000024941 · Registered fund · Jun 30, 2026
NEW COVENANT FUNDS, not summed
|
5,421 | ||
| 49.2 |
SIIT EXTENDED MARKET INDEX FUND
Fund
S000035814 · Registered fund · May 31, 2026
SEI INSTITUTIONAL INVESTMENTS TRUST, not summed
|
5,104 | ||
| 50 |
D. E. Shaw & Co., Inc.
13F
CIK 1009207 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
141,258 |
36 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
Showing 1–50 of 341 holders
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