ROCK · Insider trading · 13F holders · Congress trades
Gibraltar Industries, Inc. (ROCK)
Who is buying and selling ROCK: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 9
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
ROCK at a glance
- No open-market insider purchases or sales of ROCK were filed in the last 90 days.
- 9 13F filers hold ROCK among their 50 largest positions, worth $62.2M combined. The biggest bets by portfolio weight are Simcoe Capital Management, LLC (4.3%), TradeLink Capital LLC (3.2%) and First Wilshire Securities Management Inc (2.5%). In their latest 13Fs, 4 managers opened a new position and 2 added to one.
- No member of Congress has disclosed a trade in ROCK.
ROCK insider trading
No open-market insider purchases or sales of ROCK were filed in the last 90 days.
Who owns ROCK? Hedge funds and superinvestors
9 13F filers hold ROCK among their 50 largest positions, worth $62.2M combined. The biggest bets by portfolio weight are Simcoe Capital Management, LLC (4.3%), TradeLink Capital LLC (3.2%) and First Wilshire Securities Management Inc (2.5%). In their latest 13Fs, 4 managers opened a new position and 2 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Simcoe Capital Management, LLCHedge fund | 4.3% | $22.3M | 494,365 | New | Q2 2026 |
| SG Capital Management LLCHedge fund | 1.6% | $17.6M | 389,410 | +66.6% shares | Q2 2026 |
| First Wilshire Securities Management IncWealth manager | 2.5% | $12.1M | 268,773 | -46.2% shares | Q2 2026 |
| Monimus Capital Management, LPHedge fund | 1.1% | $4.1M | 91,939 | — | Q2 2026 |
| Expect Equity LLCHedge fund | 2.0% | $3.1M | 68,267 | +7.6% shares | Q2 2026 |
| Teton Advisors, LLCMutual fund manager | 1.4% | $2.3M | 52,000 | +0.0% shares | Q2 2026 |
| TradeLink Capital LLCHedge fund | 3.2% | $326K | 7,235 | New | Q2 2026 |
| Owls Nest Partners IA, LLCHedge fund | 0.1% | $226K | 5,000 | New | Q2 2026 |
| Turtle Creek Asset Management Inc.Hedge fund | 0.0% | $135K | 3,000 | New | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 9). Screen ROCK in the grand portfolio →
ROCK stock trades by members of Congress
No member of Congress has disclosed a trade in ROCK.
ROCK questions and answers
Are insiders buying ROCK stock?
No open-market insider purchases or sales of ROCK were filed in the last 90 days.
Which hedge funds own ROCK?
9 13F filers hold ROCK among their 50 largest positions, worth $62.2M combined. The biggest bets by portfolio weight are Simcoe Capital Management, LLC (4.3%), TradeLink Capital LLC (3.2%) and First Wilshire Securities Management Inc (2.5%). In their latest 13Fs, 4 managers opened a new position and 2 added to one.
Has Congress traded ROCK?
No member of Congress has disclosed a trade in ROCK.
Who is the largest holder of ROCK?
Among 13F filers, Simcoe Capital Management, LLC reports the largest ROCK position, $22.3M (494,365 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Simcoe Capital Management, LLC's: 4.3% of its portfolio.
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