GIBRALTAR INDUSTRIES, INC. (ROCK) — Institutional Holders, Q2 2026
246 institutional investment managers reported a ROCK position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $1.4B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
ROCK in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- SEGALL BRYANT & HAMILLNew · +587,545 sh+$26.5M
- Simcoe Capital ManagementNew · +494,365 sh+$22.3M
- SG Capital ManagementAdded · +155,602 sh+$7.0M
- FRONTIER CAPITAL MANAGEMENTAdded · +142,000 sh+$6.4M
- BALYASNY ASSET MANAGEMENT L.P.Added · +126,627 sh+$5.7M
Biggest sellers
- T. Rowe Price Investment ManagementSold out · -467,049 sh-$21.1M
- FIRST WILSHIRE SECURITIES MANAGEMENTTrimmed · -231,150 sh-$10.4M
- Boston PartnersTrimmed · -221,997 sh-$10.0M
- DIMENSIONAL FUND ADVISORSTrimmed · -206,972 sh-$9.3M
- PALISADE CAPITAL MANAGEMENTTrimmed · -190,444 sh-$8.6M
ROCK 13F holders ranked 1–100 of 246
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | BlackRock#1 · 4,919,877 sh | 4,919,877 | $221.9M | <0.01% | -2.6% |
| 2 | FMR#2 · 4,449,287 sh | 4,449,287 | $200.7M | <0.01% | +0.4% |
| 3 | ALLIANCEBERNSTEIN L.P.#3 · 2,232,832 sh | 2,232,832 | $89.0M | 0.03% | +1.6% |
| 4 | DIMENSIONAL FUND ADVISORS#4 · 1,499,025 sh | 1,499,025 | $67.6M | 0.01% | -12.1% |
| 5 | VANGUARD CAPITAL MANAGEMENT#5 · 1,332,679 sh | 1,332,679 | $60.1M | <0.01% | +0.8% |
| 6 | VANGUARD PORTFOLIO MANAGEMENT#6 · 1,290,636 sh | 1,290,636 | $58.2M | <0.01% | -2.5% |
| 7 | STATE STREET#7 · 1,228,984 sh | 1,228,984 | $55.4M | <0.01% | -8.7% |
| 8 | BARROW HANLEY MEWHINNEY & STRAUSS#8 · 984,916 sh | 984,916 | $44.4M | 0.13% | -15.8% |
| 9 | FRONTIER CAPITAL MANAGEMENT#9 · 830,272 sh | 830,272 | $37.4M | 0.35% | +20.6% |
| 10 | GEODE CAPITAL MANAGEMENT#10 · 822,869 sh | 822,869 | $37.1M | <0.01% | +5.8% |
| 11 | MIRAE ASSET GLOBAL ETFS Ltd.#11 · 805,620 sh | 805,620 | $36.3M | 0.04% | +8.5% |
| 12 | SEGALL BRYANT & HAMILL#12 · 587,545 sh | 587,545 | $26.5M | 0.31% | New |
| 13 | Simcoe Capital Management#13 · 494,365 sh | 494,365 | $22.3M | 4.06% | New |
| 14 | Boston Partners#14 · 464,628 sh | 464,628 | $20.7M | 0.02% | -32.3% |
| 15 | CHARLES SCHWAB INVESTMENT MANAGEMENT#15 · 445,326 sh | 445,326 | $20.1M | <0.01% | +1.1% |
| 16 | ROYCE & ASSOCIATES#16 · 402,365 sh | 402,365 | $18.1M | 0.15% | +39.4% |
| 17 | SG Capital Management#17 · 389,410 sh | 389,410 | $17.6M | 1.45% | +66.6% |
| 18 | MORGAN STANLEY#18 · 357,210 sh | 357,210 | $16.1M | <0.01% | -1.4% |
| 19 | NORTHERN#19 · 353,253 sh | 353,253 | $15.9M | <0.01% | +5.8% |
| 20 | FIRST WILSHIRE SECURITIES MANAGEMENT#20 · 268,773 sh | 268,773 | $12.1M | 2.50% | -46.2% |
| 21 | UBS Group AG#21 · 254,651 sh | 254,651 | $11.5M | <0.01% | +29.0% |
| 22 | BALYASNY ASSET MANAGEMENT L.P.#22 · 243,403 sh | 243,403 | $11.0M | 0.01% | +108.4% |
| 23 | KENNEDY CAPITAL MANAGEMENT#23 · 240,064 sh | 240,064 | $10.8M | 0.19% | -2.8% |
| 24 | D. E. Shaw#24 · 224,747 sh | 224,747 | $10.1M | <0.01% | -10.0% |
| 25 | Invenomic Capital Management#25 · 203,383 sh | 203,383 | $9.2M | 0.55% | +11.1% |
| 26 | VANGUARD FIDUCIARY#26 · 196,014 sh | 196,014 | $8.8M | <0.01% | +1.2% |
| 27 | CITADEL ADVISORS#27 · 191,107 sh | 191,107 | $8.6M | <0.01% | +61.3% |
| 28 | PRINCIPAL FINANCIAL GROUP#28 · 189,416 sh | 189,416 | $8.5M | <0.01% | +1.8% |
| 29 | Bank of New York Mellon#29 · 169,626 sh | 169,626 | $7.7M | <0.01% | +3.2% |
| 30 | PALISADE CAPITAL MANAGEMENT#30 · 168,431 sh | 168,431 | $7.6M | 0.33% | -53.1% |
| 31 | AQR CAPITAL MANAGEMENT#31 · 159,586 sh | 159,586 | $7.2M | <0.01% | +66.2% |
| 32 | NEW YORK STATE COMMON RETIREMENT FUND#32 · 146,525 sh | 146,525 | $6.6M | <0.01% | +1.6% |
| 33 | Invesco Ltd.#33 · 144,410 sh | 144,410 | $6.5M | <0.01% | -8.8% |
| 34 | BANK OF AMERICA#34 · 133,857 sh | 133,857 | $6.0M | <0.01% | -3.9% |
| 35 | Edgestream Partners, L.P.#35 · 125,631 sh | 125,631 | $5.7M | 0.17% | +105.9% |
| 36 | GOLDMAN SACHS GROUP#36 · 125,116 sh | 125,116 | $5.6M | <0.01% | -35.7% |
| 37 | RBF Capital#37 · 123,099 sh | 123,099 | $5.6M | 0.23% | 0.0% |
| 38 | CastleKnight Management#38 · 122,500 sh | 122,500 | $5.5M | 0.07% | -18.6% |
| 39 | Nuveen#39 · 110,246 sh | 110,246 | $5.0M | <0.01% | +51.5% |
| 40 | SYSTEMATIC FINANCIAL MANAGEMENT#40 · 104,769 sh | 104,769 | $4.7M | 0.09% | -11.6% |
| 41 | PUBLIC SECTOR PENSION INVESTMENT BOARD#41 · 101,911 sh | 101,911 | $4.6M | 0.01% | -3.6% |
| 42 | GAMCO INVESTORS, ET AL#42 · 96,625 sh | 96,625 | $4.4M | 0.04% | -8.7% |
| 43 | PRIMECAP MANAGEMENT#43 · 95,600 sh | 95,600 | $4.3M | <0.01% | 0.0% |
| 44 | MONIMUS CAPITAL MANAGEMENT#44 · 91,939 sh | 91,939 | $4.1M | 0.96% | New |
| 45 | AMERIPRISE FINANCIAL#45 · 87,546 sh | 87,546 | $3.9M | <0.01% | +7.7% |
| 46 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#46 · 85,913 sh | 85,913 | $3.9M | <0.01% | +455.3% |
| 47 | Man Group plc#47 · 83,282 sh | 83,282 | $3.8M | <0.01% | New |
| 48 | Squarepoint Ops#48 · 83,148 sh | 83,148 | $3.7M | <0.01% | New |
| 49 | RHUMBLINE ADVISERS#49 · 79,919 sh | 79,919 | $3.6M | <0.01% | -10.4% |
| 50 | PRUDENTIAL FINANCIAL#50 · 75,395 sh | 75,395 | $3.4M | <0.01% | +106.4% |
| 51 | Expect Equity#51 · 68,267 sh | 68,267 | $3.1M | 1.98% | +7.6% |
| 52 | RENAISSANCE TECHNOLOGIES#52 · 66,668 sh | 66,668 | $3.0M | <0.01% | +330.1% |
| 53 | Legal & General Group Plc#53 · 64,755 sh | 64,755 | $2.9M | <0.01% | +1.3% |
| 54 | VICTORY CAPITAL MANAGEMENT#54 · 64,336 sh | 64,336 | $2.9M | <0.01% | 0.0% |
| 55 | BESSEMER GROUP#55 · 63,737 sh | 63,737 | $2.9M | <0.01% | -0.5% |
| 56 | PICTON MAHONEY ASSET MANAGEMENT#56 · 62,487 sh | 62,487 | $2.8M | 0.02% | New |
| 57 | Swiss National Bank#57 · 59,600 sh | 59,600 | $2.7M | <0.01% | +2.4% |
| 58 | LAZARD ASSET MANAGEMENT#58 · 59,550 sh | 59,550 | $2.7M | <0.01% | +384.9% |
| 59 | AMERICAN CENTURY COMPANIES#59 · 57,243 sh | 57,243 | $2.6M | <0.01% | -1.2% |
| 60 | MILLENNIUM MANAGEMENT#60 · 56,573 sh | 56,573 | $2.6M | <0.01% | New |
| 61 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#61 · 56,083 sh | 56,083 | $2.5M | <0.01% | -12.1% |
| 62 | WESBANCO BANK#62 · 55,328 sh | 55,328 | $2.5M | 0.06% | +63.1% |
| 63 | Teton Advisors#63 · 52,000 sh | 52,000 | $2.3M | 1.36% | 0.0% |
| 64 | South Dakota Investment Council#64 · 51,090 sh | 51,090 | $2.3M | 0.04% | -1.4% |
| 65 | PRICE T ROWE ASSOCIATES#65 · 50,504 sh | 50,504 | $2.3M | <0.01% | +18.7% |
| 66 | Connor, Clark & Lunn Investment Management Ltd.#66 · 49,795 sh | 49,795 | $2.2M | <0.01% | -24.7% |
| 67 | SG Americas Securities#67 · 46,345 sh | 46,345 | $2.1M | <0.01% | +560.7% |
| 68 | MARSHALL WACE, LLP#68 · 43,345 sh | 43,345 | $2.0M | <0.01% | +313.2% |
| 69 | CITIGROUP#69 · 40,571 sh | 40,571 | $1.8M | <0.01% | +17.3% |
| 70 | WEDGE CAPITAL MANAGEMENT L L P#70 · 39,125 sh | 39,125 | $1.8M | — | +9.1% |
| 71 | Atom Investors#71 · 37,434 sh | 37,434 | $1.7M | 0.15% | +98.3% |
| 72 | CAPITAL FUND MANAGEMENT S.A.#72 · 36,794 sh | 36,794 | $1.7M | <0.01% | +78.9% |
| 73 | BFSG#73 · 36,266 sh | 36,266 | $1.6M | 0.14% | +21.8% |
| 74 | Creative Planning#74 · 36,095 sh | 36,095 | $1.6M | <0.01% | +120.8% |
| 75 | FIFTH THIRD BANCORP#75 · 34,578 sh | 34,578 | $1.6M | <0.01% | +25.2% |
| 76 | GABELLI FUNDS#76 · 34,105 sh | 34,105 | $1.5M | <0.01% | +0.1% |
| 77 | SEI INVESTMENTS#77 · 34,057 sh | 34,057 | $1.5M | <0.01% | -7.3% |
| 78 | DEUTSCHE BANK AG\#78 · 33,679 sh | 33,679 | $1.5M | <0.01% | +23.5% |
| 79 | Skylands Capital#79 · 33,350 sh | 33,350 | $1.5M | — | New |
| 80 | NEW YORK STATE TEACHERS RETIREMENT SYSTEM#80 · 32,625 sh | 32,625 | $1.5M | — | -5.5% |
| 81 | HUDSON EDGE INVESTMENT PARTNERS#81 · 32,141 sh | 32,141 | $1.4M | 0.20% | +48.2% |
| 82 | VANGUARD ASSET MANAGEMENT, Ltd#82 · 32,111 sh | 32,111 | $1.4M | <0.01% | +32.6% |
| 83 | CAXTON ASSOCIATES LLP#83 · 31,979 sh | 31,979 | $1.4M | 0.03% | +4.1% |
| 84 | BARCLAYS PLC#84 · 31,731 sh | 31,731 | $1.4M | <0.01% | -27.7% |
| 85 | Federation des caisses Desjardins du Quebec#85 · 29,789 sh | 29,789 | $1.3M | <0.01% | +0.5% |
| 86 | GREAT WEST LIFE ASSURANCE#86 · 28,942 sh | 28,942 | $1.3M | <0.01% | -5.1% |
| 87 | Rafferty Asset Management#87 · 28,067 sh | 28,067 | $1.3M | <0.01% | +21.8% |
| 88 | WELLS FARGO & COMPANY#88 · 26,182 sh | 26,182 | $1.2M | <0.01% | +126.3% |
| 89 | VIRGINIA RETIREMENT SYSTEMS ET Al#89 · 24,108 sh | 24,108 | $1.1M | <0.01% | +0.6% |
| 90 | FRANKLIN RESOURCES#90 · 23,975 sh | 23,975 | $1.1M | <0.01% | -32.5% |
| 91 | Kennondale Capital Management#91 · 23,544 sh | 23,544 | $1.1M | 0.71% | -43.7% |
| 92 | FIRST ADVISORS#92 · 23,397 sh | 23,397 | $1.1M | <0.01% | +33.5% |
| 93 | Corient Private Wealth#93 · 23,242 sh | 23,242 | $1.0M | <0.01% | -25.0% |
| 94 | Quantbot Technologies#94 · 23,051 sh | 23,051 | $1.0M | 0.04% | +1066.5% |
| 95 | MOODY NATIONAL BANK DIVISION#95 · 22,265 sh | 22,265 | $1.0M | — | +49.6% |
| 96 | JPMORGAN CHASE#96 · 21,039 sh | 21,039 | $1.0M | <0.01% | -35.7% |
| 97 | Quantinno Capital Management#97 · 22,090 sh | 22,090 | $996.3K | <0.01% | -42.9% |
| 98 | SHELTON CAPITAL MANAGEMENT#98 · 21,455 sh | 21,455 | $967.6K | 0.02% | -18.2% |
| 99 | ExodusPoint Capital Management#99 · 20,490 sh | 20,490 | $924.1K | <0.01% | New |
| 100 | Van Hulzen Asset Management#100 · 19,918 sh | 19,918 | $898.3K | 0.06% | -16.3% |
Funds that sold out of ROCK in Q2 2026 (32)
Held ROCK at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| T. Rowe Price Investment Management467,049 sh | 467,049 | $18.6M |
| NORDEA INVESTMENT MANAGEMENT AB117,469 sh | 117,469 | $4.6M |
| Congruence Capital105,371 sh | 105,371 | $4.2M |
| Advisors Preferred38,110 sh | 38,110 | $1.5M |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP30,151 sh | 30,151 | $1.2M |
| Cascade Investment Advisors22,045 sh | 22,045 | $878.9K |
| Aviance Capital Partners20,786 sh | 20,786 | $828.7K |
| LEUCADIA NATIONAL13,800 sh | 13,800 | $550.2K |
| Vident Advisory13,159 sh | 13,159 | $524.6K |
| INCEPTIONR8,870 sh | 8,870 | $353.6K |
| DRW Securities8,316 sh | 8,316 | $331.6K |
| Bridgewater Associates7,048 sh | 7,048 | $281.0K |
| Abacus Wealth Partners6,940 sh | 6,940 | $276.7K |
| Commonwealth Financial Services6,512 sh | 6,512 | $259.6K |
| EXCHANGE TRADED CONCEPTS5,977 sh | 5,977 | $238.3K |
| TWO SIGMA INVESTMENTS5,800 sh | 5,800 | $231.2K |
| QUADRANT CAPITAL GROUP8,442 sh | 8,442 | $217.3K |
| Holocene Advisors5,146 sh | 5,146 | $205.2K |
| GUGGENHEIM CAPITAL5,144 sh | 5,144 | $205.1K |
| Polymer Capital Management (US)5,073 sh | 5,073 | $202.3K |
| SEVEN MILE ADVISORY5,021 sh | 5,021 | $200.2K |
| State of Wyoming1,360 sh | 1,360 | $54.2K |
| Advisory Services Network600 sh | 600 | $23.9K |
| MAI Capital Management220 sh | 220 | $8.8K |
| Root Financial Partners49 sh | 49 | $2.0K |
| WealthCollab38 sh | 38 | $1.5K |
| Kilter Group28 sh | 28 | $1.1K |
| JPL Wealth Management25 sh | 25 | $997.00 |
| BAYBAN22 sh | 22 | $877.00 |
| Cedar Mountain Advisors15 sh | 15 | $598.00 |
| Wealth Preservation Advisors3 sh | 3 | $120.00 |
| DiNuzzo Private Wealth3 sh | 3 | $120.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.