ROCK · Gibraltar Industries, Inc. · Shareholders & Ownership
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Every disclosed holder of ROCK 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 ROCK
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) | 30,869,639 | 103.92% |
| Insiders (Forms 3, 4, 5) | 424,755 | 1.43% |
| 13D/G-only blocks | 934,622 | 3.15% |
| Remaining | 2,522,602 | -8.49% |
| Registered funds (N-PORT, not summed) | 17,273,137 | 58.15% |
Shares outstanding: 29,706,414, 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 ROCK
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,919,877 | ||
| 1.1 |
iShares Core S&P Small-Cap ETF
Fund
S000004313 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
1,787,434 | ||
| 1.2 |
iShares Russell 2000 ETF
Fund
S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
782,577 | ||
| 1.3 |
iShares Russell 2000 Value ETF
Fund
S000004342 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
284,621 | ||
| 1.4 |
iShares S&P Small-Cap 600 Value ETF
Fund
S000004316 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
255,266 | ||
| 1.5 |
iShares U.S. Home Construction ETF
Fund
S000009415 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
141,957 | ||
| 2 |
FMR LLC
13F
CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,449,287 | ||
| 2.1 |
Fidelity Low-Priced Stock Fund
Fund
S000007152 · Registered fund · Jul 31, 2026
Fidelity Puritan Trust, not summed
|
1,187,805 | ||
| 2.2 |
Strategic Advisers Fidelity U.S. Total Stock Fund
Fund
S000061481 · Registered fund · Aug 31, 2026
Fidelity Rutland Square Trust II, not summed
|
708,506 | ||
| 2.3 |
Fidelity Small Cap Discovery Fund
Fund
S000055370 · Registered fund · Jul 31, 2026
Fidelity Concord Street Trust, not summed
|
336,688 | ||
| 2.4 |
Fidelity Small Cap Index Fund
Fund
S000033638 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
|
330,839 | ||
| 2.5 |
Fidelity Series Small Cap Discovery Fund
Fund
S000055368 · Registered fund · Jul 31, 2026
Fidelity Concord Street Trust, not summed
|
287,929 | ||
| 3 |
ALLIANCEBERNSTEIN L.P.
13F
CIK 1109448 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,232,832 | ||
| 3.1 |
AB Discovery Value Fund
Fund
S000010412 · Registered fund · Jun 30, 2026
AB TRUST, not summed
|
513,947 | ||
| 3.2 |
AB Discovery Value Portfolio
Fund
S000010436 · Registered fund · Jun 30, 2026
AB VARIABLE PRODUCTS SERIES FUND, INC., not summed
|
153,461 | ||
| 3.3 |
AB Small Cap Value Portfolio
Fund
S000045542 · Registered fund · Jun 30, 2026
AB CAP FUND, INC., not summed
|
104,991 | ||
| 3.4 |
Small Cap Core Portfolio
Fund
S000051867 · Registered fund · Jun 30, 2026
Bernstein Fund Inc, not summed
|
41,241 | ||
| 3.5 |
Tax-Aware Overlay A Portfolio
Fund
S000027648 · Registered fund · Jun 30, 2026
BERNSTEIN SANFORD C FUND INC, not summed
|
5,166 | ||
| 4 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Sep 30, 2026
|
1,546,893 | ||
| 4.1 |
U.S. SMALL CAP VALUE PORTFOLIO
Fund
S000000987 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
233,122 | ||
| 4.2 |
U.S. Targeted Value Portfolio
Fund
S000000970 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
225,723 | ||
| 4.3 |
Dimensional U.S. Targeted Value ETF
Fund
S000070901 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
156,740 | ||
| 4.4 |
U.S. MICRO CAP PORTFOLIO
Fund
S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
141,196 | ||
| 4.5 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
130,347 | ||
| 5 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,332,679 | ||
| 6 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,290,636 | ||
| 7 |
|
1,228,984 | ||
| 7.1 |
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
|
272,253 | ||
| 7.2 |
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
|
151,960 | ||
| 7.3 |
State Street Institutional Small-Cap Equity Fund
Fund
S000001631 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL FUNDS, not summed
|
39,872 | ||
| 7.4 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
10,500 | ||
| 7.5 |
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
|
6,384 | ||
| 8 |
BARROW HANLEY MEWHINNEY & STRAUSS LLC
13F
CIK 313028 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
984,916 | ||
| 9 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
940,382 | ||
| 10 |
FRONTIER CAPITAL MANAGEMENT CO LLC
13F
CIK 351173 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
830,272 | ||
| 11 |
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.
13F
CIK 1705339 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
805,620 | ||
| 11.1 |
Global X U.S. Infrastructure Development ETF
Fund
S000056509 · Registered fund · Aug 31, 2026
GLOBAL X FUNDS, not summed
|
959,230 | ||
| 11.2 |
Global X Russell 2000 ETF
Fund
S000085029 · Registered fund · Jul 31, 2026
GLOBAL X FUNDS, not summed
|
14,433 | ||
| 12 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Sep 30, 2026
|
788,438 | ||
| 13 |
SEGALL BRYANT & HAMILL, LLC
13F
CIK 1006378 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
587,545 | ||
| 13.1 |
SBH SMALL CAP VALUE FUND
Fund
S000065432 · Registered fund · Jun 30, 2026
Segall Bryant & Hamill Trust, not summed
|
89,982 | ||
| 14 |
WELLINGTON MANAGEMENT GROUP LLP
13G
CIK 902219 · Holding company · Jun 30, 2025
Rule 13d-1(b), qualified institution
|
529,654 | ||
| 15 |
Simcoe Capital Management, LLC
13F
CIK 1633362 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
494,365 | ||
| 16 |
Boston Partners
13F
CIK 1386060 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
464,628 | ||
| 17 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
445,326 | ||
| 17.1 |
Schwab U.S. Small-Cap ETF
Fund
S000026636 · Registered fund · Aug 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
141,775 | ||
| 17.2 |
Schwab Fundamental U.S. Small Company ETF
Fund
S000040878 · Registered fund · Aug 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
130,005 | ||
| 17.3 |
Schwab Small-Cap Index Fund
Fund
S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
73,649 | ||
| 17.4 |
Schwab Fundamental U.S. Small Company Index Fund
Fund
S000016767 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
33,929 | ||
| 17.5 |
Schwab U.S. Broad Market ETF
Fund
S000026631 · Registered fund · Aug 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
21,703 | ||
| 18 |
T. Rowe Price Investment Management, Inc.
13G
CIK 1897612 · Investment adviser · Dec 31, 2023
unconfirmed, last confirmed Dec 31, 2023
|
404,968 | ||
| 19 |
ROYCE & ASSOCIATES LP
13F
CIK 906304 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
402,365 | ||
| 19.1 |
Royce Small-Cap Opportunity Fund
Fund
S000009512 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
|
155,888 | ||
| 19.2 |
Royce Small-Cap Special Equity Fund
Fund
S000009513 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
|
32,500 | ||
| 20 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
357,210 | ||
| 20.1 |
E*TRADE No Fee Total Market Index Fund
Fund
S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
|
133 | ||
| 21 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
353,253 | ||
| 21.1 |
Small Cap Index Fund
Fund
S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
15,322 | ||
| 21.2 |
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund
S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
|
6,636 | ||
| 21.3 |
Small Cap Core Fund
Fund
S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
4,468 | ||
| 22 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
340,149 | ||
| 23 |
VANGUARD SMALL-CAP INDEX FUND
Fund
S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
339,810 | ||
| 24 |
FIRST WILSHIRE SECURITIES MANAGEMENT INC
13F
CIK 732847 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
268,773 | ||
| 25 |
American Beacon Small Cap Value Fund
Fund
S000001818 · Registered fund · Jul 31, 2026
AMERICAN BEACON FUNDS, not summed
|
255,161 | ||
| 26 |
|
254,651 | ||
| 27 |
|
250,320 | ||
| 28 |
Balyasny Asset Management L.P.
13F
CIK 1218710 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
243,403 | ||
| 29 |
KENNEDY CAPITAL MANAGEMENT LLC
13F
CIK 884589 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
240,064 | ||
| 29.1 |
Kennedy Capital Small Cap Value Fund
Fund
S000076118 · Registered fund · Jun 30, 2026
INVESTMENT MANAGERS SERIES TRUST II, not summed
|
12,443 | ||
| 30 |
D. E. Shaw & Co., Inc.
13F
CIK 1009207 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
224,747 | ||
| 31 |
VANGUARD SMALL-CAP VALUE INDEX FUND
Fund
S000002847 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
215,460 | ||
| 32 |
VANGUARD TAX-MANAGED SMALL-CAP FUND
Fund
S000004387 · Registered fund · Jun 30, 2026
VANGUARD TAX-MANAGED FUNDS, not summed
|
203,668 | ||
| 33 |
Invenomic Capital Management LP
13F
CIK 1769456 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
203,383 | ||
| 33.1 |
Invenomic Fund
Fund
S000057713 · Registered fund · Jul 31, 2026
NORTHERN LIGHTS FUND TRUST II, not summed
|
74,922 | ||
| 34 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
196,014 | ||
| 35 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
191,107 | ||
| 36 |
VANGUARD RUSSELL 2000 INDEX FUND
Fund
S000030003 · Registered fund · Aug 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
|
173,115 | ||
| 37 |
PALISADE CAPITAL MANAGEMENT, LP
13F
CIK 1009006 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
168,431 | ||
| 38 |
Bank of New York Mellon Corp
13F
CIK 1390777 · Bank · Sep 30, 2026
|
166,622 | ||
| 39 |
AQR CAPITAL MANAGEMENT LLC
13F
CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
159,586 | ||
| 39.1 |
AQR Small Cap Multi-Style Fund
Fund
S000040064 · Registered fund · Jun 30, 2026
AQR Funds, not summed
|
6,854 | ||
| 39.2 |
AQR Small Cap Momentum Style Fund
Fund
S000025644 · Registered fund · Mar 31, 2026
AQR Funds, not summed
|
4,161 | ||
| 40 |
VANGUARD EXPLORER VALUE FUND
Fund
S000028087 · Registered fund · Aug 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
|
149,850 | ||
| 41 |
NEW YORK STATE COMMON RETIREMENT FUND
13F
CIK 810265 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
146,525 | ||
| 42 |
Invesco Ltd.
13F
CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
144,410 | ||
| 42.1 |
Invesco S&P SmallCap 600 Revenue ETF
Fund
S000064596 · Registered fund · Aug 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
|
43,301 | ||
| 42.2 |
Invesco RAFI US 1500 Small-Mid ETF
Fund
S000013120 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
38,868 | ||
| 42.3 |
Invesco S&P SmallCap Industrials ETF
Fund
S000028300 · Registered fund · Aug 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
|
17,470 | ||
| 42.4 |
Invesco S&P SmallCap 600 QVM Multi-Factor ETF
Fund
S000072320 · Registered fund · Aug 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
|
4,862 | ||
| 42.5 |
Invesco Russell 2000 Dynamic Multifactor ETF
Fund
S000064608 · Registered fund · Aug 31, 2026
Invesco Exchange-Traded Self-Indexed Fund Trust, not summed
|
454 | ||
| 43 |
PRINCIPAL FINANCIAL GROUP INC
13F
CIK 1126328 · Insurance company · Sep 30, 2026
|
141,887 | ||
| 43.1 |
Principal U.S. Small-Cap ETF
Fund
S000055159 · Registered fund · Jun 30, 2026
Principal Exchange-Traded Funds, not summed
|
45,539 | ||
| 43.2 |
SmallCap S&P 600 Index Fund
Fund
S000007203 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
|
21,853 | ||
| 43.3 |
SmallCap Value Fund II
Fund
S000007169 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
|
1,990 | ||
| 44 |
Boston Partners Small Cap Value Fund II (R6)
Fund
S000001094 · Registered fund · Aug 31, 2026
RBB Fund, Inc., not summed
|
134,291 | ||
| 45 |
BANK OF AMERICA CORP /DE/
13F
CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
133,857 | ||
| 46 |
CenterBook Partners LP
13F
CIK 1872738 · Registered investment adviser · Sep 30, 2026
|
127,363 | ||
| 47 |
Edgestream Partners, L.P.
13F
CIK 1535061 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
125,631 | ||
| 48 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
125,116 | ||
| 48.1 |
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund
S000048296 · Registered fund · Aug 31, 2026
Goldman Sachs ETF Trust, not summed
|
14,338 | ||
| 48.2 |
Multi-Manager U.S. Small Cap Equity Fund
Fund
S000051363 · Registered fund · Apr 30, 2026
Goldman Sachs Trust II, not summed
|
7,453 | ||
| 48.3 |
Goldman Sachs Multi-Manager Global Equity Fund
Fund
S000049146 · Registered fund · Jul 31, 2026
Goldman Sachs Trust II, not summed
|
6,200 | ||
| 48.4 |
Goldman Sachs Absolute Return Tracker Fund
Fund
S000020314 · Registered fund · Aug 31, 2026
GOLDMAN SACHS TRUST, not summed
|
204 | ||
| 49 |
RBF Capital, LLC
13F
CIK 1134621 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
123,099 | ||
| 50 |
CastleKnight Management LP
13F
CIK 1835751 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
122,500 |
62 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.
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