GIBRALTAR INDUSTRIES INC (ROCK) Top 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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $1.20B 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 $201.30M in its March 31, 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 $204.58M, representing an estimated gain of +1.63% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 68% 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
223
Total Reported Value
$1.20B
Largest Holder
Blackrock, Inc.
Largest Position
$201.30M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
141
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% | 5,048,987 | $201,303,115 | $204,584,953 | +$3,281,838 | +1.63% | |
| Fmr Llc | 0.01% | 4,432,059 | $176,706,193 | $179,587,031 | +$2,880,838 | +1.63% | |
| Alliancebernstein L.P. | 0.04% | 2,198,453 | $108,691,516 | $89,081,316 | -$19,610,200 | -18.04% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,705,997 | $68,018,300 | $69,126,998 | +$1,108,698 | +1.63% | |
| State Street Corp | 0.00% | 1,345,665 | $53,651,664 | $54,526,346 | +$874,682 | +1.63% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,323,731 | $52,777,155 | $53,637,580 | +$860,425 | +1.63% | |
| Vanguard Capital Management Llc | 0.00% | 1,322,342 | $52,721,776 | $53,581,298 | +$859,522 | +1.63% | |
| Barrow Hanley Mewhinney & Strauss Llc | 0.15% | 1,169,975 | $46,646,903 | $47,407,387 | +$760,484 | +1.63% | |
| Geode Capital Management, Llc | 0.00% | 777,629 | $31,009,619 | $31,509,527 | +$499,908 | +1.61% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.04% | 742,267 | $29,593,807 | $30,076,659 | +$482,852 | +1.63% | |
| Frontier Capital Management Co Llc | 0.28% | 688,272 | $27,441,405 | $27,888,781 | +$447,376 | +1.63% | |
| Boston Partners | 0.03% | 686,625 | $27,285,322 | $27,822,045 | +$536,723 | +1.97% | |
| First Wilshire Securities Management Inc | 4.49% | 499,923 | $19,931,930 | $20,256,880 | +$324,950 | +1.63% | |
| Charles Schwab Investment Management Inc | 0.00% | 440,483 | $17,562,057 | $17,848,371 | +$286,314 | +1.63% | |
| Morgan Stanley | 0.00% | 362,284 | $14,444,313 | $14,679,748 | +$235,435 | +1.63% | |
| Palisade Capital Management, Lp | 0.48% | 358,875 | $14,308,346 | $14,541,615 | +$233,269 | +1.63% | |
| Northern Trust Corp | 0.00% | 333,896 | $13,312,434 | $13,529,466 | +$217,032 | +1.63% | |
| Royce & Associates Lp | 0.11% | 288,541 | $11,504,130 | $11,691,681 | +$187,551 | +1.63% | |
| D. E. Shaw & Co., Inc. | 0.01% | 249,672 | $9,954,423 | $10,116,709 | +$162,286 | +1.63% | |
| Kennedy Capital Management Llc | 0.21% | 247,097 | $9,851,757 | $10,012,370 | +$160,613 | +1.63% | |
| Sg Capital Management Llc | 0.77% | 233,808 | $9,321,925 | $9,473,900 | +$151,975 | +1.63% | |
| Ubs Group Ag | 0.00% | 197,333 | $7,867,666 | $7,995,933 | +$128,267 | +1.63% | |
| Goldman Sachs Group Inc | 0.00% | 194,713 | $7,763,207 | $7,889,771 | +$126,564 | +1.63% | |
| Vanguard Fiduciary Trust Co | 0.00% | 193,746 | $7,724,653 | $7,850,588 | +$125,935 | +1.63% | |
| Principal Financial Group Inc | 0.00% | 186,012 | $7,416,299 | $7,537,206 | +$120,907 | +1.63% | |
| Invenomic Capital Management Lp | 0.34% | 183,072 | $7,299,081 | $7,418,077 | +$118,996 | +1.63% | |
| Bank Of New York Mellon Corp | 0.00% | 164,303 | $6,550,778 | $6,657,558 | +$106,780 | +1.63% | |
| Invesco Ltd. | 0.00% | 158,329 | $6,312,577 | $6,415,491 | +$102,914 | +1.63% | |
| Castleknight Management Lp | 0.28% | 150,500 | $6,000,435 | $6,098,260 | +$97,825 | +1.63% | |
| New York State Common Retirement Fund | 0.01% | 144,225 | $5,750,251 | $5,843,997 | +$93,746 | +1.63% | |
| Bank Of America Corp | 0.00% | 139,274 | $5,552,854 | $5,643,382 | +$90,528 | +1.63% | |
| Rbf Capital, Llc | 0.26% | 123,099 | $4,907,957 | $4,987,971 | +$80,014 | +1.63% | |
| Systematic Financial Management Lp | 0.11% | 118,468 | $4,723,374 | $4,800,323 | +$76,949 | +1.63% | |
| Citadel Advisors Llc | 0.00% | 118,449 | $4,722,562 | $4,799,553 | +$76,991 | +1.63% | |
| Balyasny Asset Management L.P. | 0.01% | 116,776 | $4,655,859 | $4,731,764 | +$75,905 | +1.63% | |
| Nordea Investment Management Ab | 0.00% | 117,469 | $4,615,357 | $4,759,844 | +$144,487 | +3.13% | |
| Gamco Investors, Inc. Et Al | 0.04% | 105,795 | $4,218,047 | $4,286,813 | +$68,766 | +1.63% | |
| Public Sector Pension Investment Board | 0.01% | 105,735 | $4,215,654 | $4,284,382 | +$68,728 | +1.63% | |
| Congruence Capital, Llc | 1.41% | 105,371 | $4,201,142 | $4,269,633 | +$68,491 | +1.63% | |
| Aqr Capital Management Llc | 0.00% | 96,033 | $3,828,835 | $3,891,257 | +$62,422 | +1.63% | |
| Primecap Management Co/Ca/ | 0.00% | 95,600 | $3,811,572 | $3,873,712 | +$62,140 | +1.63% | |
| Rhumbline Advisers | 0.00% | 89,165 | $3,554,988 | $3,612,966 | +$57,978 | +1.63% | |
| Ameriprise Financial Inc | 0.00% | 81,312 | $3,241,910 | $3,294,762 | +$52,852 | +1.63% | |
| Nuveen, Llc | 0.00% | 72,781 | $2,901,779 | $2,949,086 | +$47,307 | +1.63% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.01% | 66,105 | $2,635,606 | $2,678,575 | +$42,969 | +1.63% | |
| Victory Capital Management Inc | 0.00% | 64,347 | $2,565,515 | $2,607,340 | +$41,825 | +1.63% | |
| Legal & General Group Plc | 0.00% | 63,914 | $2,548,252 | $2,589,795 | +$41,543 | +1.63% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 63,817 | $2,544,384 | $2,585,865 | +$41,481 | +1.63% | |
| Expect Equity Llc | 2.43% | 63,467 | $2,530,429 | $2,571,683 | +$41,254 | +1.63% | |
| Edgestream Partners, L.P. | 0.08% | 61,019 | $2,432,828 | $2,472,490 | +$39,662 | +1.63% |
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.