Gibraltar Industries, Inc. (ROCK) Ownership
ROCK ownership summary
as of October 18, 2026- Institutions
- 107.7% of shares outstanding
- Insiders
- 1.00% of shares outstanding
- Shares outstanding
- 29.7M
- Float
- 29.3M shares available to trade
- Short interest
- 11.52% 2.1M shares short
- Days to cover
- 5.86 short interest up 8.0% vs prior month
- Institutions 107.74%
- Insiders 1.00%
ROCK top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 16.57% | 4.9M | $186.4M | −129,110 (−2.6%) | June 30, 2026 |
| 2 | FMR Inc | 14.99% | 4.4M | $168.6M | +17,228 (+0.4%) | June 30, 2026 |
| 3 | AllianceBernstein L.P. | 7.52% | 2.2M | $84.6M | +34,379 (+1.6%) | June 30, 2026 |
| 4 | Dimensional Fund Advisors, Inc. | 5.05% | 1.5M | $56.8M | −206,972 (−12.1%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 4.49% | 1.3M | $50.5M | +10,337 (+0.8%) | June 30, 2026 |
| 6 | Vanguard Portfolio Management, LLC | 4.35% | 1.3M | $48.9M | −33,095 (−2.5%) | June 30, 2026 |
| 7 | State Street Corp | 4.14% | 1.2M | $46.6M | −116,681 (−8.7%) | June 30, 2026 |
| 8 | Barrow Hanley Mewhinney & Strauss LLC | 3.32% | 985K | $37.3M | −185,059 (−15.8%) | June 30, 2026 |
| 9 | Frontier Capital Management CO Inc | 2.80% | 830K | $31.5M | +142,000 (+20.6%) | June 30, 2026 |
| 10 | Geode Capital Management, LLC | 2.77% | 823K | $31.2M | +45,240 (+5.8%) | June 30, 2026 |
| 11 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 2.71% | 806K | $30.5M | +63,353 (+8.5%) | June 30, 2026 |
| 12 | Segall Bryant & Hamill | 1.98% | 588K | $22.3M | +156,550 (+36.3%) | June 30, 2026 |
| 13 | Simcoe Capital Management, LLC | 1.67% | 494K | $18.7M | +494,365 (0.0%) | June 30, 2026 |
| 14 | Boston Partners Global Investors, Inc | 1.57% | 465K | $17.6M | −221,997 (−32.3%) | June 30, 2026 |
| 15 | Charles Schwab Investment Management Inc | 1.50% | 445K | $16.9M | +4,843 (+1.1%) | June 30, 2026 |
| 16 | Royce & Associates, LP | 1.36% | 402K | $15.2M | +113,824 (+39.4%) | June 30, 2026 |
| 17 | SG Capital Management, LLC | 1.31% | 389K | $14.8M | +155,602 (+66.6%) | June 30, 2026 |
| 18 | Morgan Stanley - Brokerage Accounts | 1.20% | 357K | $13.5M | −5,074 (−1.4%) | June 30, 2026 |
| 19 | Northern Trust Corp | 1.19% | 353K | $13.4M | +19,357 (+5.8%) | June 30, 2026 |
| 20 | First Wilshire Securities Mgmt Inc (CA) | 0.91% | 269K | $10.2M | −231,150 (−46.2%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 12 holders added 1.3M shares and 8 cut 1.1M.
ROCK top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Small-Cap ETF | 5.95% | 1.8M | $66.9M | +456 (+0.0%) | September 30, 2026 |
| 2 | Fidelity Low-Priced Stock | 4.00% | 1.2M | $45.0M | — | July 31, 2026 |
| 3 | Global X US Infrastructure Dev ETF | 3.34% | 990K | $37.5M | +7,020 (+0.7%) | September 30, 2026 |
| 4 | Vanguard MStar Total Stk Mkt Idx Invest | 3.17% | 940K | $35.6M | — | August 31, 2026 |
| 5 | iShares Russell 2000 ETF | 2.62% | 777K | $29.4M | −8,960 (−1.1%) | September 30, 2026 |
| 6 | Strategic Advisers Fidelity US TtlStk | 2.39% | 709K | $26.8M | — | August 31, 2026 |
| 7 | AB Discovery Value Advisor | 2.00% | 593K | $22.5M | +46,252 (+8.5%) | August 31, 2026 |
| 8 | Fidelity Small Cap Discovery | 1.13% | 337K | $12.8M | — | July 31, 2026 |
| 9 | Vanguard Small Cap Index | 1.13% | 334K | $12.7M | −6,839 (−2.0%) | September 30, 2026 |
| 10 | Fidelity Small Cap Index | 1.11% | 331K | $12.5M | +2,512 (+0.8%) | July 31, 2026 |
| 11 | Fidelity Series Small Cap Discovery | 0.97% | 288K | $10.9M | — | July 31, 2026 |
| 12 | iShares Russell 2000 Value ETF | 0.95% | 283K | $10.7M | +428 (+0.2%) | September 30, 2026 |
| 13 | Strategic Advisers U.S. Total Stock | 0.93% | 277K | $10.5M | +23,982 (+9.5%) | August 31, 2026 |
| 14 | State Street SPDR Port S&P 600 Sm CpETF | 0.91% | 269K | $10.2M | — | September 30, 2026 |
| 15 | American Beacon Small Cp Val R5 | 0.86% | 255K | $9.7M | — | August 31, 2026 |
| 16 | DFA US Small Cap Value I | 0.85% | 254K | $9.6M | +20,476 (+8.8%) | August 31, 2026 |
| 17 | iShares S&P Small-Cap 600 Value ETF | 0.85% | 251K | $9.5M | — | September 30, 2026 |
| 18 | DFA US Targeted Value I | 0.76% | 226K | $8.6M | — | August 31, 2026 |
| 19 | Fidelity Low-Priced Stock K6 | 0.74% | 219K | $8.3M | — | July 31, 2026 |
| 20 | Vanguard MStar Small Cap Value Index | 0.73% | 218K | $8.2M | +838 (+0.4%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ROCK insider transactions
latest 6| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-13 | William T Bosway | Buy | $41.37 | 1,000 | $41,370 |
| 2026-03-10 | James S Metcalf | Buy | $40.35 | 12,444 | $502,115 |
| 2026-03-10 | William T Bosway | Buy | $39.52 | 1,500 | $59,280 |
| 2026-03-09 | William T Bosway | Buy | $38.29 | 4,500 | $172,305 |
| 2025-05-05 | James B Nish | Sell | $58.21 | 1,172 | $68,222 |
| 2025-05-02 | James B Nish | Sell | $57.58 | 2,670 | $153,739 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ROCK shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ROCK
Institutional investors own 107.7% of Gibraltar Industries's shares and insiders 1.00%. The largest holder is BlackRock Inc with 16.57% of the shares (4.9M), as of June 30, 2026. Among the top 20 institutions, 12 added shares and 8 reduced their stake in the latest filings. Short interest is 11.52% of the float, or 5.86 days of average trading volume. The share count fell 3.7% since 2014.
Related: ROCK analyst forecast, ROCK key metrics. See the ROCK stock overview for the latest quote and news.
ROCK ownership FAQ
Who owns the most Gibraltar Industries stock?
The largest shareholders of Gibraltar Industries are BlackRock Inc (16.57%), FMR Inc (14.99%), AllianceBernstein L.P. (7.52%), Dimensional Fund Advisors, Inc. (5.05%), Vanguard Capital Management, LLC (4.49%).
What percentage of Gibraltar Industries is owned by institutions?
Institutions hold 107.7% of Gibraltar Industries's shares outstanding; insiders hold 1.00%.
Which funds own Gibraltar Industries?
The largest fund holders of Gibraltar Industries are iShares Core S&P Small-Cap ETF (5.95%), Fidelity Low-Priced Stock (4.00%), Global X US Infrastructure Dev ETF (3.34%), Vanguard MStar Total Stk Mkt Idx Invest (3.17%), iShares Russell 2000 ETF (2.62%).
What is Gibraltar Industries's short interest?
2.1M shares of Gibraltar Industries were sold short, 11.52% of the float; at the average daily volume it would take 5.86 days to cover.
Are insiders buying or selling Gibraltar Industries?
Of the latest 6 reported insider transactions in Gibraltar Industries (since May 2, 2025), 4 were purchases and 2 were sales.
How many shares of Gibraltar Industries are outstanding?
Gibraltar Industries has 29.7M shares outstanding, of which 29.3M are in the public float.