Owens Corning
Owens Corning (OC) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · OC · as of Sep 30, 2025
Ownership Breakdown
737
Institutional Holders
▲ 12 vs Q2
$10.78B
Total Inst. Value
▲ $124.21M vs Q2
80.53M
Shares Outstanding
freeFloat 99.01%
76.18M
13F Shares Held
▼ 1.22M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
OC largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. abrasive, asbestos & misc nonmetallic mineral prods | 10.72M | 12.61% | 12.61% | $1.52T | Nov 12, 2025 | ▲ 11.7K |
VANGUARD GROUP INC abrasive, asbestos & misc nonmetallic mineral prods | 9.68M | 11.39% | 11.39% | $1.37T | Nov 7, 2025 | ▼ 265.8K |
STATE STREET CORP abrasive, asbestos & misc nonmetallic mineral prods | 3.63M | 4.28% | 4.28% | $514.21B | Nov 14, 2025 | ▲ 81.1K |
PRICE T ROWE ASSOCIATES INC /MD/ abrasive, asbestos & misc nonmetallic mineral prods | 2.36M | 2.78% | 2.78% | $334.18B | Nov 14, 2025 | ▼ 25.2K |
DIMENSIONAL FUND ADVISORS LP abrasive, asbestos & misc nonmetallic mineral prods | 1.93M | 2.27% | 2.27% | $273.10B | Nov 12, 2025 | ▲ 110.5K |
DAVIS SELECTED ADVISERS abrasive, asbestos & misc nonmetallic mineral prods | 1.78M | 2.09% | 2.09% | $251.43B | Dec 29, 2025 | ▲ 8.3K |
GEODE CAPITAL MANAGEMENT, LLC abrasive, asbestos & misc nonmetallic mineral prods | 1.76M | 2.07% | 2.07% | $254.80B | Nov 12, 2025 | ▲ 59.5K |
LSV ASSET MANAGEMENT abrasive, asbestos & misc nonmetallic mineral prods | 1.45M | 1.71% | 1.71% | $205.06B | Nov 6, 2025 | ▲ 4.4K |
AQR CAPITAL MANAGEMENT LLC abrasive, asbestos & misc nonmetallic mineral prods | 1.23M | 1.45% | 1.45% | $173.20B | Nov 14, 2025 | ▲ 268.0K |
FIRST TRUST ADVISORS LP abrasive, asbestos & misc nonmetallic mineral prods | 1.17M | 1.38% | 1.38% | $165.44B | Nov 12, 2025 | ▲ 248.8K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
28
Increased
+4.00M shares3
New Positions
first time holders18
Decreased
−3.17M shares0
Sold Out
fully exitedNet shares change (top 50)
+829.6K
+4.00M / −3.17M
Net new holders
+13
3 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
OC insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
18
Buy transactions
3
Sell transactions
6.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Marcon Rachel Barthelemy President, Doors | May 28, 2026 | Sale | 700 | $120.71 | $84.5K | 15.8K | Form 4 ↗ |
FESTA ALFRED E director | May 8, 2026 | Award | 407 | $121.67 | $49.5K | 12.9K | Form 4 ↗ |
Martin Paul Edward director | May 8, 2026 | Award | 382 | $121.67 | $46.5K | 8.0K | Form 4 ↗ |
Nimocks Suzanne P director | May 8, 2026 | Award | 414 | $121.67 | $50.4K | 36.5K | Form 4 ↗ |
Lonergan Edward F director | May 8, 2026 | Award | 750 | $121.67 | $91.3K | 54.1K | Form 4 ↗ |
Doerfler Mari Vice President and Controller | May 8, 2026 | Sale | 1,926 | $120.92 | $232.9K | 3.1K | Form 4 ↗ |
Collins Michelle T director | May 8, 2026 | Award | 478 | $121.67 | $58.2K | 2.5K | Form 4 ↗ |
Elsner Adrienne director | May 8, 2026 | Award | 382 | $121.67 | $46.5K | 18.7K | Form 4 ↗ |
Williams John David director | May 8, 2026 | Award | 382 | $121.67 | $46.5K | 54.2K | Form 4 ↗ |
CORDEIRO EDUARDO E director | May 8, 2026 | Award | 407 | $121.67 | $49.5K | 15.9K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Owens Corning (OC) is primarily owned by institutional investors, who hold approximately 94.6% of total shares outstanding. Company insiders own approximately 0.99%, while retail and public investors account for the remaining 4.41%.
The largest institutional shareholder of Owens Corning is BLACKROCK, INC., holding approximately 10.72 million shares — equal to 12.61% of outstanding shares — as of September 30, 2025.
A total of 737 institutional investors currently hold OC stock, with a combined institutional value of approximately $10.78 billion as of the most recent 13F filing period.
Frequently asked questions
OC ownershipOwens Corning (OC) is primarily owned by institutional investors, who hold approximately 94.6% of shares. The largest shareholder is BLACKROCK, INC. with a 12.61% stake. Company insiders hold 0.99%. Data sourced from SEC Form 13F as of September 30, 2025.