| DIMENSIONAL FUND ADVISORS LP |
| 1.5M |
| $67.6M |
| -12.1% |
| 5.054% |
| 0.01% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 1.3M | $60.1M | +0.8% | 4.493% | 0.00% |
| 6 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.3M | $58.2M | -2.5% | 4.351% | 0.00% |
| 7 | STATE STREET CORP | 1.2M | $55.4M | -8.7% | 4.143% | 0.00% |
| 8 | BARROW HANLEY MEWHINNEY & STRAUSS LLC | 985K | $44.4M | -15.8% | 3.321% | 0.13% |
| 9 | FRONTIER CAPITAL MANAGEMENT CO LLC | 830K | $37.4M | +20.6% | 2.799% | 0.35% |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 823K | $37.1M | +5.8% | 2.774% | 0.00% |
| 11 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 806K | $36.3M | +8.5% | 2.716% | 0.04% |
| 12 | SEGALL BRYANT & HAMILL, LLC | 588K | $26.5M | +36.3% | 1.981% | 0.31% |
| 13 | Simcoe Capital Management, LLC | 494K | $22.3M | — | 1.667% | 4.06% |
| 14 | Boston Partners | 465K | $20.7M | -32.3% | 1.566% | 0.02% |
| 15 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 445K | $20.1M | +1.1% | 1.501% | 0.00% |
| 16 | ROYCE & ASSOCIATES LP | 402K | $18.1M | +39.5% | 1.357% | 0.15% |
| 17 | SG Capital Management LLC | 389K | $17.6M | +66.5% | 1.313% | 1.45% |
| 18 | MORGAN STANLEY | 357K | $16.1M | -1.4% | 1.204% | 0.00% |
| 19 | NORTHERN TRUST CORP | 353K | $15.9M | +5.8% | 1.191% | 0.00% |
| 20 | FIRST WILSHIRE SECURITIES MANAGEMENT INC | 269K | $12.1M | -46.2% | 0.906% | 2.50% |
| 21 | UBS Group AG | 255K | $11.5M | +29.0% | 0.859% | 0.00% |
| 22 | BALYASNY ASSET MANAGEMENT L.P. | 243K | $11.0M | +108.4% | 0.821% | 0.01% |
| 23 | KENNEDY CAPITAL MANAGEMENT LLC | 240K | $10.8M | -2.9% | 0.809% | 0.19% |
| 24 | D. E. Shaw & Co., Inc. | 225K | $10.1M | -10.0% | 0.758% | 0.00% |
| 25 | Invenomic Capital Management LP | 203K | $9.2M | +11.1% | 0.686% | 0.55% |
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.
| 100.85% |
| 0.58 pp |
| $1.67B |
| +0.3% |
| Q4 2024 | 279 | 1.8% | 101.43% | 0.53 pp | $1.66B | 15% |
| Q3 2024 | 284 | — | 101.96% | — | $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.
50 institutions opened new positions in ROCK during Q2 2026, while 32 fully exited. 140 added to existing positions and 50 trimmed.
ROCK institutional ownership rose by 0.47 percentage points quarter-over-quarter, with a net change of +18 holders.
The top 10 institutions account for 63.3% of all reported 13F value in ROCK, and the top 25 account for 82.0%.
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