Flagship Harbor Advisors’s Gibraltar Industries ROCK Stock Holding History

Flagship Harbor Advisors’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	–	Sell	-5	Closed	-$247	–	1863
2025 Q4	$247	Buy	+5	New	+$287	﹤0.01%	2149
2020 Q4	–	Sell	-1,173	Closed	-$76K	–	1499
2020 Q3	$76K	Hold	1,173	–	–	0.01%	737
2020 Q2	$56K	Buy	1,173 +158	+16%	+$7.03K	0.01%	822
2020 Q1	$44K	Buy	1,015 +715	+238%	+$35.8K	0.01%	788
2019 Q4	$15K	Buy	300 +100	+50%	+$5.02K	﹤0.01%	1202
2019 Q3	$9K	Buy	200 +100	+100%	+$4.19K	﹤0.01%	1323
2019 Q2	$4K	Hold	100	–	–	﹤0.01%	1563
2019 Q1	$4K	Hold	100	–	–	﹤0.01%	1553
2018 Q4	$3K	Buy	+100	New	+$3.65K	﹤0.01%	1577

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

Flagship Harbor Advisors's ROCK Position: Q1 2026 in Review

Flagship Harbor Advisors sold out of Gibraltar Industries (ROCK) in Q1 2026, closing a stake of 5 shares — an estimated $247 sold.

Flagship Harbor Advisors first reported a position in ROCK in Q4 2018 and held it in 9 quarters. The position peaked at $76K in Q3 2020. 228 funds tracked by Wall St. Rank hold ROCK as of Q1 2026.

Flagship Harbor Advisors reported no remaining Gibraltar Industries position as of Q1 2026 after selling out during the quarter.
Flagship Harbor Advisors sold 5 Gibraltar Industries shares in Q1 2026, an estimated $247.
Flagship Harbor Advisors first reported a position in Gibraltar Industries in Q4 2018 and held it in 9 quarters.
Flagship Harbor Advisors's Gibraltar Industries position peaked at $76K in Q3 2020.
228 funds tracked by Wall St. Rank held Gibraltar Industries as of Q1 2026.

Based on Flagship Harbor Advisors's 13F filing for Q1 2026, filed 28 Apr 2026.