ROCK Gibraltar Industries Inc.
Gibraltar Industries Inc. (ROCK) Hedge Fund Activity
This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.
Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.
Most significant moves
Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.
| Fund | Action | Shares changed | Change | Est. value | Portfolio wt. | Score |
|---|---|---|---|---|---|---|
| Bridgewater Associates Quant Macro | Sold Out | -7.0K | -100.0% | $317.9K | 0.0% | 61 |
| MILLENNIUM MANAGEMENT LLC | New | +56.6K | — | $2.6M | 0.0% | 59 |
| TWO SIGMA INVESTMENTS, LP Quant | Sold Out | -5.8K | -100.0% | $261.6K | 0.0% | 57 |
| Squarepoint Ops LLC Quant | New | +83.1K | — | $3.7M | 0.0% | 57 |
| Holocene Advisors, LP | Sold Out | -5.1K | -100.0% | $232.1K | 0.0% | 56 |
| RENAISSANCE TECHNOLOGIES LLC Quant | Increased | +51.2K | +330.1% | $2.3M | 0.0% | 54 |
| Man Group Event Long/Short | New | +83.3K | — | $3.8M | 0.0% | 54 |
| Balyasny Asset Management L.P. | Increased | +126.6K | +108.4% | $5.7M | 0.0% | 53 |
| ExodusPoint Capital Management Long/Short Quant | New | +20.5K | — | $924.1K | 0.0% | 52 |
| MARSHALL WACE, LLP Long/Short | Increased | +32.9K | +313.2% | $1.5M | 0.0% | 52 |
Most significant buyers
By move score, not size.
- MILLENNIUM MANAGEMENT LLC
- Squarepoint Ops LLC
- RENAISSANCE TECHNOLOGIES LLC
- Man Group
- Balyasny Asset Management L.P.
Most significant sellers
By move score, not size.
- Bridgewater Associates
- TWO SIGMA INVESTMENTS, LP
- Holocene Advisors, LP
- D. E. Shaw & Co., Inc.
- CastleKnight Management
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Bridgewater Associates | 1 | 0 | 7.0K | -7.0K | -100.0% | 0.0% | Sold Out | 61 |
| MILLENNIUM MANAGEMENT LLC | 2 | 56.6K | 0 | +56.6K | — | 0.0% | New | 59 |
| TWO SIGMA INVESTMENTS, LP | 2 | 0 | 5.8K | -5.8K | -100.0% | 0.0% | Sold Out | 57 |
| Squarepoint Ops LLC | 2 | 83.1K | 0 | +83.1K | — | 0.0% | New | 57 |
| Holocene Advisors, LP | 2 | 0 | 5.1K | -5.1K | -100.0% | 0.0% | Sold Out | 56 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 66.7K | 15.5K | +51.2K | +330.1% | 0.0% | Increased | 54 |
| Man Group | 3 | 83.3K | 0 | +83.3K | — | 0.0% | New | 54 |
| Balyasny Asset Management L.P. | 2 | 243.4K | 116.8K | +126.6K | +108.4% | 0.0% | Increased | 53 |
| ExodusPoint Capital Management | 3 | 20.5K | 0 | +20.5K | — | 0.0% | New | 52 |
| MARSHALL WACE, LLP | 2 | 43.3K | 10.5K | +32.9K | +313.2% | 0.0% | Increased | 52 |
| Lighthouse Investment Partners | 3 | 14.0K | 0 | +14.0K | — | 0.0% | New | 51 |
| Engineers Gate | 4 | 14.6K | 0 | +14.6K | — | 0.0% | New | 48 |
| Edgestream Partners | 4 | 125.6K | 61.0K | +64.6K | +105.9% | 0.2% | Increased | 46 |
| CITADEL ADVISORS LLC | 1 | 191.1K | 118.4K | +72.7K | +61.3% | 0.0% | Increased | 44 |
| Capital Fund Management | 3 | 36.8K | 20.6K | +16.2K | +78.9% | 0.0% | Increased | 42 |
| Quantbot Technologies | 4 | 23.1K | 2.0K | +21.1K | +1066.5% | 0.0% | Increased | 39 |
| AQR Capital Management | 3 | 159.6K | 96.0K | +63.6K | +66.2% | 0.0% | Increased | 38 |
| Brevan Howard Capital Management | 3 | 10.7K | 6.2K | +4.5K | +72.2% | 0.0% | Increased | 36 |
| D. E. Shaw & Co., Inc. | 1 | 224.7K | 249.7K | -24.9K | -10.0% | 0.0% | Reduced | 31 |
| Quadrature Capital | 3 | 8.8K | 6.5K | +2.2K | +34.1% | 0.0% | Increased | 30 |
| CastleKnight Management | 3 | 122.5K | 150.5K | -28.0K | -18.6% | 0.2% | Reduced | 27 |
| Caxton Associates | 3 | 32.0K | 30.7K | +1.3K | +4.1% | 0.0% | Increased | 23 |
| Aquatic Capital Management | 4 | 9.0K | 10.1K | -1.1K | -10.8% | 0.0% | Reduced | 20 |
Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeHedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.