ROCK Institutional Ownership & Shareholders
GIBRALTAR INDUSTRIES INC (ROCK) is currently held by 247 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $1.21B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
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 $155.91M, representing an estimated loss of -29.73% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 60% of the total disclosed ROCK value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Alliancebernstein L.P., Dimensional Fund Advisors Lp, 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
247
Total Reported Value
$1.21B
Largest Holder
Blackrock, Inc.
Largest Position
$221.89M
Insider Transactions (90d)
1
Latest Filing Quarter
Q2 2026
New Institutional Positions
50
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 | $155,910,902 | -$65,975,551 | -29.73% | |
| Alliancebernstein L.P. | 0.03% | 2,232,832 | $89,023,012 | $70,758,446 | -$18,264,566 | -20.52% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,546,893 | $61,257,709 | $49,021,039 | -$12,236,670 | -19.98% | |
| Vanguard Capital Management Llc | 0.00% | 1,332,679 | $60,103,823 | $42,232,598 | -$17,871,225 | -29.73% | |
| Fmr Llc | 0.00% | 992,850 | $58,240,563 | $31,463,417 | -$26,777,147 | -45.98% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,290,636 | $58,207,684 | $40,900,255 | -$17,307,429 | -29.73% | |
| State Street Corp | 0.00% | 1,228,984 | $55,408,855 | $38,946,503 | -$16,462,352 | -29.71% | |
| Barrow Hanley Mewhinney & Strauss Llc | 0.13% | 984,916 | $44,419,712 | $31,211,988 | -$13,207,724 | -29.73% | |
| Frontier Capital Management Co Llc | 0.35% | 830,272 | $37,445,267 | $26,311,320 | -$11,133,947 | -29.73% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.04% | 805,620 | $36,332,965 | $25,530,098 | -$10,802,867 | -29.73% | |
| Geode Capital Management, Llc | 0.00% | 788,438 | $31,228,222 | $24,985,600 | -$6,242,622 | -19.99% | |
| Segall Bryant & Hamill, Llc | 0.31% | 587,545 | $26,498,280 | $18,619,301 | -$7,878,979 | -29.73% | |
| Simcoe Capital Management, Llc | 4.33% | 494,365 | $22,295,862 | $15,666,427 | -$6,629,435 | -29.73% | |
| Boston Partners | 0.02% | 464,628 | $20,684,101 | $14,724,061 | -$5,960,040 | -28.81% | |
| Charles Schwab Investment Management Inc | 0.00% | 445,326 | $20,084,203 | $14,112,381 | -$5,971,822 | -29.73% | |
| Royce & Associates Lp | 0.15% | 402,365 | $18,146,662 | $12,750,947 | -$5,395,715 | -29.73% | |
| Morgan Stanley | 0.00% | 357,210 | $16,110,205 | $11,319,985 | -$4,790,220 | -29.73% | |
| Northern Trust Corp | 0.00% | 353,253 | $15,931,711 | $11,194,588 | -$4,737,123 | -29.73% | |
| First Wilshire Securities Management Inc | 2.50% | 268,773 | $12,121,662 | $8,517,416 | -$3,604,246 | -29.73% | |
| Ubs Group Ag | 0.00% | 254,651 | $11,484,761 | $8,069,890 | -$3,414,871 | -29.73% | |
| Balyasny Asset Management L.P. | 0.02% | 243,403 | $10,977,475 | $7,713,441 | -$3,264,034 | -29.73% | |
| Kennedy Capital Management Llc | 0.19% | 240,064 | $10,826,886 | $7,607,628 | -$3,219,258 | -29.73% | |
| D. E. Shaw & Co., Inc. | 0.01% | 224,747 | $10,136,090 | $7,122,232 | -$3,013,858 | -29.73% | |
| Invenomic Capital Management Lp | 0.55% | 203,383 | $9,172,573 | $6,445,207 | -$2,727,366 | -29.73% | |
| Vanguard Fiduciary Trust Co | 0.00% | 196,014 | $8,840,231 | $6,211,684 | -$2,628,547 | -29.73% | |
| Citadel Advisors Llc | 0.00% | 191,107 | $8,618,926 | $6,056,181 | -$2,562,745 | -29.73% | |
| Palisade Capital Management, Lp | 0.33% | 168,431 | $7,596,238 | $5,337,578 | -$2,258,660 | -29.73% | |
| Aqr Capital Management Llc | 0.00% | 159,586 | $7,197,328 | $5,057,280 | -$2,140,048 | -29.73% | |
| New York State Common Retirement Fund | 0.01% | 146,525 | $6,608,278 | $4,643,377 | -$1,964,901 | -29.73% | |
| Bank Of New York Mellon Corp | 0.00% | 166,622 | $6,598,249 | $5,280,251 | -$1,317,998 | -19.97% | |
| Invesco Ltd. | 0.00% | 144,410 | $6,512,891 | $4,576,353 | -$1,936,538 | -29.73% | |
| Bank Of America Corp | 0.00% | 133,857 | $6,036,951 | $4,241,928 | -$1,795,023 | -29.73% | |
| Edgestream Partners, L.P. | 0.17% | 125,631 | $5,665,958 | $3,981,246 | -$1,684,712 | -29.73% | |
| Goldman Sachs Group Inc | 0.00% | 125,116 | $5,642,732 | $3,964,926 | -$1,677,806 | -29.73% | |
| Principal Financial Group Inc | 0.00% | 141,887 | $5,618,725 | $4,496,399 | -$1,122,326 | -19.97% | |
| Rbf Capital, Llc | 0.23% | 123,099 | $5,551,765 | $3,901,007 | -$1,650,758 | -29.73% | |
| Castleknight Management Lp | 0.20% | 122,500 | $5,524,750 | $3,882,025 | -$1,642,725 | -29.73% | |
| Centerbook Partners Lp | 0.23% | 127,363 | $5,043,575 | $4,036,133 | -$1,007,442 | -19.97% | |
| Nuveen, Llc | 0.00% | 110,246 | $4,972,095 | $3,493,696 | -$1,478,399 | -29.73% | |
| Systematic Financial Management Lp | 0.09% | 104,769 | $4,725,161 | $3,320,130 | -$1,405,031 | -29.74% | |
| Public Sector Pension Investment Board | 0.01% | 101,911 | $4,596,186 | $3,229,560 | -$1,366,626 | -29.73% | |
| Gamco Investors, Inc. Et Al | 0.04% | 96,625 | $4,357,788 | $3,062,046 | -$1,295,742 | -29.73% | |
| Primecap Management Co/Ca/ | 0.00% | 95,600 | $4,311,560 | $3,029,564 | -$1,281,996 | -29.73% | |
| Monimus Capital Management, Lp | 1.05% | 91,939 | $4,146,449 | $2,913,547 | -$1,232,902 | -29.73% | |
| Ameriprise Financial Inc | 0.00% | 87,546 | $3,948,325 | $2,774,333 | -$1,173,992 | -29.73% | |
| Susquehanna International Group, Llp | 0.00% | 85,913 | $3,874,676 | $2,722,583 | -$1,152,093 | -29.73% | |
| Man Group Plc | 0.01% | 83,282 | $3,756,018 | $2,639,207 | -$1,116,811 | -29.73% | |
| Squarepoint Ops Llc | 0.01% | 83,148 | $3,749,975 | $2,634,960 | -$1,115,015 | -29.73% | |
| Rhumbline Advisers | 0.00% | 79,919 | $3,604,330 | $2,532,633 | -$1,071,697 | -29.73% | |
| Prudential Financial Inc | 0.00% | 75,395 | $3,400,315 | $2,389,268 | -$1,011,047 | -29.73% |
Frequently asked questions about ROCK
Who are the largest institutional holders of ROCK?
The largest institutional holders of ROCK reported in the latest SEC Form 13F filings include Blackrock, Inc., Alliancebernstein L.P., Dimensional Fund Advisors Lp, Vanguard Capital Management Llc, and Fmr Llc. InsiderSet ranks institutional holders by their latest reported ROCK position.
What is ROCK institutional ownership?
This page tracks ROCK positions reported by institutional investment managers through SEC Form 13F. GIBRALTAR INDUSTRIES INC (ROCK) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ROCK?
InsiderSet currently tracks 247 institutional managers reporting ROCK holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ROCK shareholders.
How much ROCK stock do institutions own?
Institutional investment managers disclosed approximately $1.21B in ROCK holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ROCK institutional ownership last updated?
The latest ROCK institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ROCK holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ROCK position after the reporting date.
Are institutions buying or selling ROCK?
Institutional buying and selling can be analyzed by comparing ROCK positions across consecutive 13F reporting periods. InsiderSet's ROCK Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ROCK ownership changes.
How has ROCK institutional ownership changed over time?
InsiderSet tracks ROCK institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.