Ken Griffin
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Ken Griffin’s Gibraltar Industries ROCK Stock Holding History

Ken Griffin’s Portfolio ROCK Stock Details ROCK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q2 		– Sell
-43,500
Closed -$2.55M – 14690
2025
Q1 		$2.55M Sell
43,500
-200
-0.5% -$12.4K ﹤0.01% 5064
2024
Q4 		$2.57M Buy
43,700
+33,800
+341% +$2.3M ﹤0.01% 5122
2024
Q3 		$692K Buy
9,900
+6,300
+175% +$440K ﹤0.01% 7569
2024
Q2 		$247K Buy
3,600
+2,600
+260% +$189K ﹤0.01% 9521
2024
Q1 		$80.5K Sell
1,000
-4,500
-82% -$359K ﹤0.01% 11641
2023
Q4 		$434K Sell
5,500
-3,100
-36% -$212K ﹤0.01% 8405
2023
Q3 		$581K Sell
8,600
-600
-7% -$41K ﹤0.01% 7728
2023
Q2 		$579K Sell
9,200
-3,900
-30% -$211K ﹤0.01% 7619
2023
Q1 		$635K Sell
13,100
-2,700
-17% -$138K ﹤0.01% 7808
2022
Q4 		$725K Sell
15,800
-3,000
-16% -$144K ﹤0.01% 7469
2022
Q3 		$769K Buy
18,800
+11,900
+172% +$507K ﹤0.01% 7561
2022
Q2 		$267K Sell
6,900
-8,100
-54% -$330K ﹤0.01% 10079
2022
Q1 		$644K Buy
+15,000
New +$790K ﹤0.01% 8781
2021
Q3 		– Sell
-5,300
Closed -$404K – 14525
2021
Q2 		$404K Sell
5,300
-800
-13% -$66.1K ﹤0.01% 10536
2021
Q1 		$558K Buy
+6,100
New +$560K ﹤0.01% 9439

Other funds holding ROCK

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
AllianceBernstein
AllianceBernstein Nashville, Tennessee $309B AUM 23.92% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Barrow, Hanley, Mewhinney & Strauss
Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $33B AUM 40.62% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Mirae Asset Global ETFs Holdings
Mirae Asset Global ETFs Holdings Causeway Bay, Hong Kong $73.7B AUM 53.56% 1-Year Est. Return

Ken Griffin's ROCK Position: Q1 2026 in Review

Ken Griffin increased its Gibraltar Industries (ROCK) stake by 27% in Q1 2026, buying an estimated $1.21M and bringing the position to 118,449 shares worth $4.72M. The position accounts for ﹤0.01% of the portfolio, ranked #4438.

Ken Griffin first reported a position in ROCK in Q2 2013 and has held it in 36 quarters since. The position peaked at $11.6M in Q3 2025. 228 funds tracked by Wall St. Rank hold ROCK as of Q1 2026.

  • Ken Griffin held 118,449 shares of Gibraltar Industries worth $4.72M as of Q1 2026.
  • Ken Griffin bought 25,132 Gibraltar Industries shares in Q1 2026, an estimated $1.21M.
  • Gibraltar Industries made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #4438 holding.
  • Ken Griffin first reported a position in Gibraltar Industries in Q2 2013 and has held it in 36 quarters since.
  • Ken Griffin's Gibraltar Industries position peaked at $11.6M in Q3 2025.
  • 228 funds tracked by Wall St. Rank held Gibraltar Industries as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.