Which hedge funds own ROCK? GIBRALTAR INDS INC, Q2 2026 13F holders
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6 of the hedge funds tracked by WhaleCreep disclosed a position in ROCK (GIBRALTAR INDS INC) in their Q2 2026 13F filings, worth $26.7m in total. The largest holder by portfolio weight is Brevan Howard Capital Management at 0.0% of its book. 1 manager opened a new position this quarter: Millennium Management. 2 exited: Bridgewater Associates, Holocene Advisors.
6tracked managers holding
1opened this quarter
2exited this quarter
Which hedge funds hold ROCK? Current holders by portfolio weight
| Manager | As of | Weight of book | Value | Shares | Δ shares | Action |
|---|---|---|---|---|---|---|
| Brevan Howard Capital Management | Q2 2026 | 0.0% | $480.4k | 10,651 | 72% | added |
| D. E. Shaw & Co | Q2 2026 | 0.0% | $10.1m | 224,747 | -10% | reduced |
| Citadel Advisors | Q2 2026 | 0.0% | $8.6m | 191,107 | 61% | added |
| Renaissance Technologies LLC | Q2 2026 | 0.0% | $3.0m | 66,668 | 330% | added |
| Millennium Management | Q2 2026 | 0.0% | $2.6m | 56,573 | – | new |
| Marshall Wace | Q2 2026 | 0.0% | $2.0m | 43,345 | 313% | added |
Exited since the previous quarter
| Manager | Prior weight | Prior value |
|---|---|---|
| Bridgewater Associates | 0.0% | $281.0k |
| Holocene Advisors | 0.0% | $205.2k |
How has hedge fund ownership of ROCK changed?
| Quarter | Managers holding | Combined value |
|---|---|---|
| Q2 2026 | 6 | $26.7m |
| Q1 2026 | 7 | $16.4m |
| Q4 2025 | 4 | $14.0m |
| Q3 2025 | 4 | $21.4m |
| Q2 2025 | 4 | $26.9m |
| Q1 2025 | 3 | $29.9m |
| Q4 2024 | 4 | $34.7m |
| Q3 2024 | 4 | $36.5m |
| Q2 2024 | 4 | $39.6m |
| Q1 2024 | 3 | $43.1m |
| Q4 2023 | 3 | $40.2m |
| Q3 2023 | 3 | $28.4m |
| Q2 2023 | 3 | $26.5m |
| Q1 2023 | 3 | $20.4m |
| Q4 2022 | 3 | $19.9m |
| Q3 2022 | 4 | $15.5m |
Counts every tracked manager that disclosed ROCK in that quarter's filing, including managers that have since stopped filing.