$OC

$114.26 +$0.03 (0.03%) Close

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

Ownership

13F as of Q2 2026 · 79.0M shares outstanding

Who owns OC?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 46.9%

BlackRock, Inc. 11.2% · Vanguard Portfolio Management LLC 6.9%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

691

+54 vs last qtr

Net shares bought

+2.8M

by institutions in Q2 2026

New / sold out

139 / 85

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Aqr Capital Management LLC +1.1M
Norges Bank NEW +1.1M

Biggest sellers in Q2 2026

Millennium Management LLC −528.0K
D. E. Shaw & Co., Inc. SOLD OUT −499.2K

Who is planning to sell?

Notices of proposed sale, last 12 months

$317K

2 notices from 2 people

Shares covered

2.6K

0.00% of the company

Arranged in advance

27%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Doerfler Mari Officer $233K
Marcon Rachel Barthelemy Officer 10b5-1 $84.5K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

−27.2%

−3.47% a year

Each share's claim on the business

+37.4%

grew without buying or selling a share

Spent on buybacks vs paid in stock

$4.35B vs $528M

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+ years75% 3–5 years4% 1–3 years12% Under 1 year10%

Quarterly turnover

10.5%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting OC on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	8.8M	11.15%	−396.3K (−4.3%)	≤2021	0.0%
Shares held by quarter Peak holding10.9M (Q1'25) Change over 8 quarters−1.2M Share of the company11.150% BlackRock, Inc.'s full portfolio →
VP Vanguard Portfolio Management LLC	5.5M	6.92%	−39.5K (−0.7%)	≤2021	0.0%
Shares held by quarter Peak holding5.5M (Q1'26) Change over 8 quarters+5.5M Share of the company6.920% Vanguard Portfolio Management LLC's full portfolio →

BlackRock, Inc.

8.8M

% of company

11.15%

Change vs last qtr

−396.3K (−4.3%)

Held since

≤2021

Vanguard Portfolio Management LLC

5.5M

% of company

6.92%

Change vs last qtr

−39.5K (−0.7%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Owens Corning, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting OC on Form N-PORT; together they hold 45.0% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
FT First Trust RBA American Industrial Renaissance ETF First Trust Exchange-Traded Fund VI	$447M	2.8M	3.56%	3.89%	June 30, 2026
IC iShares Core S&P Mid-Cap ETF iShares Trust	$438M	2.8M	3.49%	0.35%	June 30, 2026

First Trust RBA American Industrial Renaissance ETF

First Trust Exchange-Traded Fund VI

Position value

$447M

% of company

3.56%

% of the fund

3.89%

As of

June 30, 2026

iShares Core S&P Mid-Cap ETF

iShares Trust

Position value

$438M

% of company

3.49%

% of the fund

0.35%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Owens Corning and how much of the fund the position is.

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