GIBRALTAR INDUSTRIES INC (ROCK) Institutional Shareholders
GIBRALTAR INDUSTRIES INC (ROCK) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $1.39B in ROCK holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of ROCK tracked by InsiderSet, reporting ownership valued at approximately $221.89M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $235.56M, representing an estimated gain of +6.16% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 63% of the total disclosed ROCK value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Fmr Llc, Alliancebernstein L.P., and several other long-term asset managers with concentrated positions in GIBRALTAR INDUSTRIES INC (ROCK).
This page ranks the largest institutional ROCK shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
239
Total Reported Value
$1.39B
Largest Holder
Blackrock, Inc.
Largest Position
$221.89M
Insider Transactions (90d)
4
Latest Filing Quarter
Q2 2026
New Institutional Positions
55
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 4,919,877 | $221,886,453 | $235,563,711 | +$13,677,258 | +6.16% | |
| Fmr Llc | 0.01% | 4,449,287 | $200,662,843 | $213,031,862 | +$12,369,019 | +6.16% | |
| Alliancebernstein L.P. | 0.03% | 2,232,832 | $89,023,012 | $106,907,996 | +$17,884,984 | +20.09% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,499,025 | $67,605,534 | $71,773,317 | +$4,167,783 | +6.16% | |
| Vanguard Capital Management Llc | 0.00% | 1,332,679 | $60,103,823 | $63,808,671 | +$3,704,848 | +6.16% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,290,636 | $58,207,684 | $61,795,652 | +$3,587,968 | +6.16% | |
| State Street Corp | 0.00% | 1,228,984 | $55,408,855 | $58,843,754 | +$3,434,899 | +6.20% | |
| Barrow Hanley Mewhinney & Strauss Llc | 0.13% | 984,916 | $44,419,712 | $47,157,778 | +$2,738,066 | +6.16% | |
| Frontier Capital Management Co Llc | 0.35% | 830,272 | $37,445,267 | $39,753,423 | +$2,308,156 | +6.16% | |
| Geode Capital Management, Llc | 0.00% | 822,869 | $37,118,202 | $39,398,968 | +$2,280,766 | +6.14% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.04% | 805,620 | $36,332,965 | $38,573,086 | +$2,240,121 | +6.17% | |
| Segall Bryant & Hamill, Llc | 0.31% | 587,545 | $26,498,280 | $28,131,655 | +$1,633,375 | +6.16% | |
| Simcoe Capital Management, Llc | 4.33% | 494,365 | $22,295,862 | $23,670,196 | +$1,374,334 | +6.16% | |
| Boston Partners | 0.02% | 464,628 | $20,684,101 | $22,246,389 | +$1,562,288 | +7.55% | |
| Charles Schwab Investment Management Inc | 0.00% | 445,326 | $20,084,203 | $21,322,209 | +$1,238,006 | +6.16% | |
| Sixth Street Partners Management Company, L.P. | 0.00% | 445,326 | $20,084,203 | $21,322,209 | +$1,238,006 | +6.16% | |
| Royce & Associates Lp | 0.15% | 402,365 | $18,146,662 | $19,265,236 | +$1,118,574 | +6.16% | |
| Sg Capital Management Llc | 1.59% | 389,410 | $17,562,391 | $18,644,951 | +$1,082,560 | +6.16% | |
| Morgan Stanley | 0.00% | 357,210 | $16,110,205 | $17,103,215 | +$993,010 | +6.16% | |
| Northern Trust Corp | 0.00% | 353,253 | $15,931,711 | $16,913,754 | +$982,043 | +6.16% | |
| First Wilshire Securities Management Inc | 2.50% | 268,773 | $12,121,662 | $12,868,851 | +$747,189 | +6.16% | |
| Ubs Group Ag | 0.00% | 254,651 | $11,484,761 | $12,192,690 | +$707,929 | +6.16% | |
| Balyasny Asset Management L.P. | 0.02% | 243,403 | $10,977,475 | $11,654,136 | +$676,661 | +6.16% | |
| Kennedy Capital Management Llc | 0.19% | 240,064 | $10,826,886 | $11,494,264 | +$667,378 | +6.16% | |
| D. E. Shaw & Co., Inc. | 0.01% | 224,747 | $10,136,090 | $10,760,886 | +$624,796 | +6.16% | |
| Invenomic Capital Management Lp | 0.55% | 203,383 | $9,172,573 | $9,737,978 | +$565,405 | +6.16% | |
| Vanguard Fiduciary Trust Co | 0.00% | 196,014 | $8,840,231 | $9,385,150 | +$544,919 | +6.16% | |
| Citadel Advisors Llc | 0.00% | 191,107 | $8,618,926 | $9,150,203 | +$531,277 | +6.16% | |
| Principal Financial Group Inc | 0.00% | 189,416 | $8,542,662 | $9,069,238 | +$526,576 | +6.16% | |
| Bank Of New York Mellon Corp | 0.00% | 169,626 | $7,650,154 | $8,121,693 | +$471,539 | +6.16% | |
| Palisade Capital Management, Lp | 0.33% | 168,431 | $7,596,238 | $8,064,476 | +$468,238 | +6.16% | |
| Aqr Capital Management Llc | 0.00% | 159,586 | $7,197,328 | $7,640,978 | +$443,650 | +6.16% | |
| New York State Common Retirement Fund | 0.01% | 146,525 | $6,608,278 | $7,015,617 | +$407,339 | +6.16% | |
| Invesco Ltd. | 0.00% | 144,410 | $6,512,891 | $6,914,351 | +$401,460 | +6.16% | |
| Bank Of America Corp | 0.00% | 133,857 | $6,036,951 | $6,409,073 | +$372,122 | +6.16% | |
| Edgestream Partners, L.P. | 0.17% | 125,631 | $5,665,958 | $6,015,212 | +$349,254 | +6.16% | |
| Goldman Sachs Group Inc | 0.00% | 125,116 | $5,642,732 | $5,990,554 | +$347,822 | +6.16% | |
| Rbf Capital, Llc | 0.23% | 123,099 | $5,551,765 | $5,893,980 | +$342,215 | +6.16% | |
| Castleknight Management Lp | 0.20% | 122,500 | $5,524,750 | $5,865,300 | +$340,550 | +6.16% | |
| Nuveen, Llc | 0.00% | 110,246 | $4,972,095 | $5,278,578 | +$306,483 | +6.16% | |
| Systematic Financial Management Lp | 0.09% | 104,769 | $4,725,161 | $5,016,340 | +$291,179 | +6.16% | |
| Public Sector Pension Investment Board | 0.01% | 101,911 | $4,596,186 | $4,879,499 | +$283,313 | +6.16% | |
| Gamco Investors, Inc. Et Al | 0.04% | 96,625 | $4,357,788 | $4,626,405 | +$268,617 | +6.16% | |
| Primecap Management Co/Ca/ | 0.00% | 95,600 | $4,311,560 | $4,577,328 | +$265,768 | +6.16% | |
| Monimus Capital Management, Lp | 1.05% | 91,939 | $4,146,449 | $4,402,039 | +$255,590 | +6.16% | |
| Ameriprise Financial Inc | 0.00% | 87,546 | $3,948,325 | $4,191,702 | +$243,377 | +6.16% | |
| Susquehanna International Group, Llp | 0.00% | 85,913 | $3,874,676 | $4,113,514 | +$238,838 | +6.16% | |
| Man Group Plc | 0.01% | 83,282 | $3,756,018 | $3,987,542 | +$231,524 | +6.16% | |
| Squarepoint Ops Llc | 0.01% | 83,148 | $3,749,975 | $3,981,126 | +$231,151 | +6.16% | |
| Rhumbline Advisers | 0.00% | 79,919 | $3,604,330 | $3,826,522 | +$222,192 | +6.16% |
Frequently asked questions about ROCK
Who owns the most ROCK stock?
The largest holders of ROCK are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for GIBRALTAR INDUSTRIES INC (ROCK).
Is ROCK widely held by superinvestors?
Many widely followed stocks like ROCK appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ROCK is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.