$ROCK

$38.61 +$0.51 (1.34%) Close

$ROCK Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 29.7M shares outstanding

Who owns ROCK?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 66.0%

BlackRock, Inc. 16.6% · FMR LLC 15.0%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

244

+15 vs last qtr

Net shares bought

+10.8K

by institutions in Q2 2026

New / sold out

53 / 38

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Simcoe Capital Management, LLC NEW +494.4K
Segall Bryant & Hamill, LLC +156.6K

Biggest sellers in Q2 2026

T. Rowe Price Investment Management, Inc. SOLD OUT −467.0K
First Wilshire Securities Management Inc −231.2K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Gibraltar Industries, Inc. in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

−6.5%

−0.74% a year

Each share's claim on the business

+7.0%

grew without buying or selling a share

Spent on buybacks vs paid in stock

$224M vs $87.7M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years78% 3–5 years1% 1–3 years5% Under 1 year16%

Quarterly turnover

9.2%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting ROCK on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	4.9M	16.57%	−129.1K (−2.6%)	≤2021	0.0%
Shares held by quarter Peak holding5.5M (Q4'24) Change over 8 quarters−476.8K Share of the company16.570% BlackRock, Inc.'s full portfolio →
F FMR LLC	4.4M	14.99%	+17.2K (+0.4%)	≤2021	0.0%
Shares held by quarter Peak holding4.4M (Q2'26) Change over 8 quarters+3.7M Share of the company14.990% FMR LLC's full portfolio →

BlackRock, Inc.

4.9M

% of company

16.57%

Change vs last qtr

−129.1K (−2.6%)

Held since

≤2021

FMR LLC

4.4M

% of company

14.99%

Change vs last qtr

+17.2K (+0.4%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Gibraltar Industries, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting ROCK on Form N-PORT; together they hold 58.8% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
IC iShares Core S&P Small-Cap ETF iShares Trust	$80.6M	1.8M	6.02%	0.07%	June 30, 2026
FL Fidelity Low-Priced Stock Fund Fidelity Puritan Trust	$50.2M	1.2M	4.00%	0.20%	July 31, 2026

iShares Core S&P Small-Cap ETF

iShares Trust

Position value

$80.6M

% of company

6.02%

% of the fund

0.07%

As of

June 30, 2026

Fidelity Low-Priced Stock Fund

Fidelity Puritan Trust

Position value

$50.2M

% of company

4.00%

% of the fund

0.20%

As of

July 31, 2026

23 more funds behind a free account

See every fund holding Gibraltar Industries, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
BW Bosway William T Insider	250.3K	0.84%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.840% Bosway William T's insider activity →
ML Myers Linda Kristine Insider	21.7K	0.07%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.070% Myers Linda Kristine's insider activity →

Bosway William T

Insider

250.3K

% of company

0.84%

Change vs last qtr

—

Held since

—

Myers Linda Kristine

Insider

21.7K

% of company

0.07%

Change vs last qtr

—

Held since

—

10 more holders behind a free account

See every insider and 5%+ holder of Gibraltar Industries, Inc..

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