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Which hedge funds own ROCK? GIBRALTAR INDS INC, Q2 2026 13F holders

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33 tracked hedge funds disclosed a position in ROCK (GIBRALTAR INDS INC) in their Q2 2026 13F filings, worth $119.8m in total. The largest holder by portfolio weight is Simcoe Capital Management, LLC at 4.3% of its book. 13 opened a new position this quarter: Simcoe Capital Management, LLC, TradeLink Capital LLC, Monimus Capital Management, LP, Skylands Capital, LLC. 4 exited: Bridgewater Associates, LP, Arrowstreet Capital, Limited Partnership, Holocene Advisors, LP.

33
Holders
Tracked managers whose filing for the quarter reports a long equity position in the security.
13
New this quarter
Holders whose previous filing (at most two quarters earlier) did not report the security.
4
Exited this quarter
Tracked managers whose previous filing reported the security and whose filing for the quarter does not.
$37.4m
Inflow, new holders
Combined value of the positions the new holders reported for the quarter.
$1.9m
Outflow, exits
Combined value the exiting managers reported for the security in their previous filing.
$120m
Combined value
Sum of the holders' reported positions in the security.
2.7%
Share of managers holding
Holders as a share of tracked managers filing for that quarter. Comparable across the 2024 coverage expansion, where the raw holder count is not.

Holders, Q2 2026

33 rows
Simcoe Capital Management, LLC Hedge fund4.3%$22.3m494,365–new
TradeLink Capital LLC Hedge fund3.2%$326k7,235–new
Expect Equity LLC Hedge fund2.0%$3.1m68,267+7.6%added
SG Capital Management LLC Hedge fund1.6%$17.6m389,410+67%added
Monimus Capital Management, LP Hedge fund1.1%$4.1m91,939–new
CastleKnight Management LP Hedge fund0.2%$5.5m122,500−19%reduced
Skylands Capital, LLC Hedge fund0.2%$1.5m33,350–new
Edgestream Partners, L.P. Hedge fund0.2%$5.7m125,631+106%added
Atom Investors LP Hedge fund0.2%$1.7m37,434+98%added
Fox Run Management, L.L.C. Hedge fund0.1%$800k17,734+15%added
Owls Nest Partners IA, LLC Hedge fund0.07%$226k5,000–new
Quantbot Technologies LP Hedge fund0.04%$1.0m23,051+1067%added
Caxton Associates LLP Hedge fund0.03%$1.4m31,979+4.1%added
Balyasny Asset Management L.P. Hedge fund0.02%$11.0m243,403+108%added
Lighthouse Investment Partners, LLC Hedge fund0.02%$631k13,995–new
Aquatic Capital Management LLC Hedge fund0.01%$405k8,983−11%reduced
Capital Fund Management S.A. Hedge fund0.01%$1.7m36,794+79%added
Entropy Technologies, LP Hedge fund0.01%$291k6,462–new
Engineers Gate Manager LP Hedge fund0.01%$661k14,647–new
ExodusPoint Capital Management, LP Hedge fund0.01%$924k20,490–new
SummitTX Capital, L.P. Hedge fund0.01%$308k6,830−37%reduced
Squarepoint Ops LLC Hedge fund0.01%$3.7m83,148–new
Brevan Howard Capital Management LP Hedge fund0.01%$480k10,651+72%added
D. E. Shaw & Co., Inc. Hedge fund0.01%$10.1m224,747−10.0%reduced
Turtle Creek Asset Management Inc. Hedge fund0.01%$135k3,000–new
Freestone Grove Partners LP Hedge fund0.01%$805k17,859−26%reduced
Citadel Advisors LLC Hedge fund0.0%$8.6m191,107+61%added
Renaissance Technologies LLC Hedge fund0.0%$3.0m66,668+330%added
AQR Capital Management LLC Hedge fund0.0%$7.2m159,586+66%added
Millennium Management LLC Hedge fund0.0%$2.6m56,573–new
Marshall Wace, LLP Hedge fund0.0%$2.0m43,345+313%added
Fulcrum Asset Management LLP Hedge fund0.0%$1.5k34–new
Quarry LP Hedge fund0.0%$54112−98%reduced