Marshall Wace’s Gibraltar Industries ROCK Stock Holding History

Marshall Wace’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 Q1	$418K	Buy	+10,491	New	+$507K	﹤0.01%	2523
2025 Q3	–	Sell	-4,455	Closed	-$263K	–	3334
2025 Q2	$263K	Sell	4,455 -16,299	-79%	-$933K	﹤0.01%	2364
2025 Q1	$1.22M	Sell	20,754 -5,587	-21%	-$348K	﹤0.01%	1697
2024 Q4	$1.55M	Buy	+26,341	New	+$1.8M	﹤0.01%	1549
2024 Q3	–	Sell	-18,223	Closed	-$1.25M	–	2894
2024 Q2	$1.25M	Buy	18,223 +12,224	+204%	+$890K	﹤0.01%	1587
2024 Q1	$483K	Buy	+5,999	New	+$478K	﹤0.01%	1937
2023 Q1	–	Sell	-15,280	Closed	-$701K	–	3048
2022 Q4	$701K	Buy	+15,280	New	+$733K	﹤0.01%	2232
2022 Q3	–	Sell	-129,230	Closed	-$5.01M	–	3727
2022 Q2	$5.01M	Buy	+129,230	New	+$5.27M	0.01%	1333
2020 Q4	–	Sell	-26,810	Closed	-$1.75M	–	2129
2020 Q3	$1.75M	Sell	26,810 -56,283	-68%	-$3.32M	0.01%	845
2020 Q2	$3.99M	Sell	83,093 -59,270	-42%	-$2.64M	0.03%	551
2020 Q1	$6.11M	Sell	142,363 -20,064	-12%	-$1M	0.06%	324
2019 Q4	$8.19M	Sell	162,427 -48,124	-23%	-$2.42M	0.06%	358
2019 Q3	$9.67M	Buy	+210,551	New	+$8.81M	0.08%	306

Other funds holding ROCK

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

AllianceBernstein Nashville, Tennessee $309B AUM 23.92% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $30.5B AUM 29.95% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Mirae Asset Global ETFs Holdings Causeway Bay, Hong Kong $73.7B AUM 53.56% 1-Year Est. Return

Marshall Wace's ROCK Position: Q1 2026 in Review

Marshall Wace opened a new position in Gibraltar Industries (ROCK) in Q1 2026: 10,491 shares worth $418K. The stake represents ﹤0.01% of the portfolio and ranks #2523 among its holdings. This is a return to the name: Marshall Wace previously reported a position in ROCK as recently as Q2 2025.

Marshall Wace first reported a position in ROCK in Q3 2019 and has held it in 13 quarters since. The position peaked at $9.67M in Q3 2019. 228 funds tracked by Wall St. Rank hold ROCK as of Q1 2026.

Marshall Wace held 10,491 shares of Gibraltar Industries worth $418K as of Q1 2026.
Gibraltar Industries was a new Marshall Wace position in Q1 2026.
Gibraltar Industries made up ﹤0.01% of Marshall Wace's portfolio in Q1 2026, its #2523 holding.
Marshall Wace first reported a position in Gibraltar Industries in Q3 2019 and has held it in 13 quarters since.
Marshall Wace's Gibraltar Industries position peaked at $9.67M in Q3 2019.
228 funds tracked by Wall St. Rank held Gibraltar Industries as of Q1 2026.

Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.