Jane Street
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Jane Street’s Gibraltar Industries ROCK Stock Holding History

Jane Street’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
2026
Q2 		$574K Buy
+12,729
New +$499K ﹤0.01% 7697
2026
Q1 		– Sell
-95,065
Closed -$4.7M – 12785
2025
Q4 		$4.7M Buy
+95,065
New +$5.45M ﹤0.01% 3329
2025
Q3 		– Sell
-88,493
Closed -$5.22M – 11617
2025
Q2 		$5.22M Sell
88,493
-14,210
-14% -$814K ﹤0.01% 2928
2025
Q1 		$6.02M Buy
102,703
+61,702
+150% +$3.84M ﹤0.01% 2653
2024
Q4 		$2.41M Sell
41,001
-12,396
-23% -$845K ﹤0.01% 3781
2024
Q3 		$3.73M Buy
53,397
+17,938
+51% +$1.25M ﹤0.01% 3341
2024
Q2 		$2.43M Buy
35,459
+32,309
+1,026% +$2.35M ﹤0.01% 4165
2024
Q1 		$254K Sell
3,150
-4,416
-58% -$352K ﹤0.01% 7814
2023
Q4 		$598K Sell
7,566
-2,867
-27% -$196K ﹤0.01% 6461
2023
Q3 		$704K Sell
10,433
-21,750
-68% -$1.49M ﹤0.01% 5717
2023
Q2 		$2.02M Buy
32,183
+9,599
+43% +$519K ﹤0.01% 4149
2023
Q1 		$1.1M Buy
22,584
+10,204
+82% +$522K ﹤0.01% 4826
2022
Q4 		$568K Buy
12,380
+1,931
+18% +$92.7K ﹤0.01% 5916
2022
Q3 		$428K Buy
+10,449
New +$446K ﹤0.01% 6971
2021
Q4 		– Sell
-3,276
Closed -$228K – 10711
2021
Q3 		$228K Sell
3,276
-6,296
-66% -$453K ﹤0.01% 8659
2021
Q2 		$730K Sell
9,572
-29,667
-76% -$2.45M ﹤0.01% 6507
2021
Q1 		$3.59M Buy
39,239
+32,132
+452% +$2.95M ﹤0.01% 2920
2020
Q4 		$511K Buy
+7,107
New +$475K ﹤0.01% 5714
2018
Q4 		– Sell
-9,774
Closed -$446K – 5581
2018
Q3 		$446K Buy
+9,774
New +$423K ﹤0.01% 3748

Other funds holding ROCK

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
AllianceBernstein
AllianceBernstein Nashville, Tennessee $302B AUM 26.44% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Barrow, Hanley, Mewhinney & Strauss
Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $33B AUM 40.62% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $10.7B AUM 67.78% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Jane Street's ROCK Position: Q2 2026 in Review

Jane Street opened a new position in Gibraltar Industries (ROCK) in Q2 2026: 12,729 shares worth $574K. The stake represents ﹤0.01% of the portfolio and ranks #7697 among its holdings. This is a return to the name: Jane Street previously reported a position in ROCK as recently as Q4 2025.

Jane Street first reported a position in ROCK in Q3 2018 and has held it in 19 quarters since. The position peaked at $6.02M in Q1 2025. 245 funds tracked by Wall St. Rank hold ROCK as of Q2 2026.

  • Jane Street held 12,729 shares of Gibraltar Industries worth $574K as of Q2 2026.
  • Gibraltar Industries was a new Jane Street position in Q2 2026.
  • Gibraltar Industries made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #7697 holding.
  • Jane Street first reported a position in Gibraltar Industries in Q3 2018 and has held it in 19 quarters since.
  • Jane Street's Gibraltar Industries position peaked at $6.02M in Q1 2025.
  • 245 funds tracked by Wall St. Rank held Gibraltar Industries as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.