Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ROCK held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 5.0M | $201.3M | +1.6% | 17.022% | 0.00% |
| 2 | FMR LLC | 4.4M | $176.7M | +19.9% | 14.942% | 0.01% |
| 3 | ALLIANCEBERNSTEIN L.P. | 2.2M | $108.7M | +28.2% | 7.412% | 0.04% |
| 4 | DIMENSIONAL FUND ADVISORS LP | 1.7M | $68.0M | +0.4% | 5.752% | 0.01% |
| 5 | STATE STREET CORP | 1.3M | $53.7M | -1.3% | 4.537% | 0.00% |
| 6 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.3M | $52.8M | — | 4.463% | 0.00% |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | 1.3M | $52.7M | — | 4.458% | 0.00% |
| 8 | BARROW HANLEY MEWHINNEY & STRAUSS LLC | 1.2M | $46.6M | +18.6% | 3.944% | 0.15% |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 778K | $31.0M | +5.4% | 2.622% | 0.00% |
| 10 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 742K | $29.6M | +52.3% | 2.502% | 0.04% |
| 11 | FRONTIER CAPITAL MANAGEMENT CO LLC | 688K | $27.4M | +25.7% | 2.320% | 0.28% |
| 12 | Boston Partners | 687K | $27.3M | -25.7% | 2.315% | 0.03% |
| 13 | FIRST WILSHIRE SECURITIES MANAGEMENT INC | 500K | $19.9M | +287.7% | 1.685% | 4.49% |
| 14 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 440K | $17.6M | +0.0% | 1.485% | 0.00% |
| 15 | MORGAN STANLEY | 362K | $14.4M | -16.6% | 1.221% | 0.00% |
| 16 | PALISADE CAPITAL MANAGEMENT LLC/NJ | 359K | $14.3M | -4.5% | 1.210% | 0.48% |
| 17 | NORTHERN TRUST CORP | 334K | $13.3M | +3.6% | 1.126% | 0.00% |
| 18 | ROYCE & ASSOCIATES LP | 289K | $11.5M | +46.7% | 0.973% | 0.11% |
| 19 | D. E. Shaw & Co., Inc. | 250K | $10.0M | -21.9% | 0.842% | 0.01% |
| 20 | KENNEDY CAPITAL MANAGEMENT, INC. | 247K | $9.9M | -1.6% | 0.833% | 0.21% |
| 21 | SG Capital Management LLC | 234K | $9.3M | — | 0.788% | 0.62% |
| 22 | UBS Group AG | 197K | $7.9M | +197.3% | 0.665% | 0.00% |
| 23 | GOLDMAN SACHS GROUP INC | 195K | $7.8M | +8.1% | 0.656% | 0.00% |
| 24 | VANGUARD FIDUCIARY TRUST CO | 194K | $7.7M | — | 0.653% | 0.00% |
| 25 | PRINCIPAL FINANCIAL GROUP INC | 186K | $7.4M | +8.4% | 0.627% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ROCK — a direct measure of their conviction.
Filings activity in ROCK during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 222 | 11% | 100.73% | 18.74 pp | $1.20B | 16% |
| Q4 2025 | 249 | 4.6% | 119.47% | 32.79 pp | $1.43B | 22% |
| Q3 2025 | 261 | 1.1% | 152.26% | +11.91 pp | $1.82B | +8.5% |
| Q2 2025 | 264 | +0.4% | 140.35% | +0.86 pp | $1.68B | +0.6% |
| Q1 2025 | 263 | 5.7% | 139.49% | +0.43 pp | $1.67B | +0.3% |
| Q4 2024 | 279 | 1.8% | 139.06% | 25.01 pp | $1.66B | 15% |
| Q3 2024 | 284 | 2.1% | 164.07% | 0.01 pp | $1.96B | 0.0% |
| Q2 2024 | 290 | — | 164.08% | — | $1.96B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Latest Form 4 transactions by company officers and directors. Insider buys are widely viewed as the highest-conviction signal because executives are risking personal capital.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| May 26, 2026 | Bosway William T | Buy | 20K | $37.44 | $739K |
| May 21, 2026 | Bolanowski Katherine | Buy | 1K | $35.63 | $45K |
Quick answers to the most common questions about buying ROCK stock.
Based on Q1 2026 13F filings, institutional ownership of Gibraltar Industries, Inc. stands at 100.7%, held across 222 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of ROCK, with approximately 5,048,987 shares worth $0.20B as of Q1 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of ROCK.
Our composite Smart Money Score for ROCK is 15 out of 100 (Heavy Distribution). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
38 institutions opened new positions in ROCK during Q1 2026, while 65 fully exited. 49 added to existing positions and 134 trimmed.
ROCK institutional ownership fell by 18.74 percentage points quarter-over-quarter, with a net change of -27 holders.
The top 10 institutions account for 68.2% of all reported 13F value in ROCK, and the top 25 account for 85.3%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Gibraltar Industries, Inc. (ROCK) Institutional Ownership