As of September 29, 2026, Owens Corning's top three insider holders are Brian Chambers (Chair, President And Ceo, 395.54K shares), Marcio A Sandri (President, Composites, 57.47K shares), Edward F Lonergan (Director, 54.96K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Brian Chambers | Chair, President And Ceo | 395,537 | 0 | 395,537 | 35.3% | 27 Feb, 2026 |
| 2 | Marcio A Sandri | President, Composites | 57,470 | 0 | 57,470 | 5.1% | 07 Feb, 2025 |
| 3 | Edward F Lonergan | Director | 54,958 | 0 | 54,958 | 4.9% | 10 Aug, 2026 |
| 4 | John David Williams | Director | 54,752 | 0 | 54,752 | 4.9% | 10 Aug, 2026 |
| 5 | Todd W Fister | President And Coo | 52,138 | 0 | 52,138 | 4.7% | 17 Sep, 2026 |
| 6 | Daniel T Smith | Evp And Chief Growth Officer | 46,895 | 0 | 46,895 | 4.2% | 08 Aug, 2023 |
| 7 | W Howard Morris | Director | 41,915 | 0 | 41,915 | 3.7% | 14 Apr, 2025 |
| 8 | Kenneth Scott Parks | Evp Chief Financial Officer | 37,295 | 0 | 37,295 | 3.3% | 06 Feb, 2023 |
| 9 | Suzanne P Nimocks | Director | 36,938 | 0 | 36,938 | 3.3% | 10 Aug, 2026 |
| 10 | Gina A. Beredo | Evp, Cao Gc | 36,351 | 0 | 36,351 | 3.2% | 27 Feb, 2026 |
| 11 | Gunner Smith | President, Roofing | 30,053 | 0 | 30,053 | 2.7% | 25 Feb, 2025 |
| 12 | Maryann T. Mannen | Director | 27,410 | 0 | 27,410 | 2.4% | 13 Apr, 2026 |
| 13 | Monaco Nicolas Del | President, Roofing | 26,330 | 0 | 26,330 | 2.3% | 17 Sep, 2026 |
| 14 | Paula Russell | Evp, Chief Hr Officer | 25,988 | 0 | 25,988 | 2.3% | 14 Apr, 2025 |
| 15 | Christopher O Ball | President, Doors | 25,255 | 0 | 25,255 | 2.3% | 28 Feb, 2025 |
| 16 | Jose Mendez-Andino | Evp, Chief Innovation Officer | 24,507 | 0 | 24,507 | 2.2% | 10 Aug, 2026 |
| 17 | Rachel Barthelemy Marcon | President, Doors | 21,449 | 0 | 21,449 | 1.9% | 01 Sep, 2026 |
| 18 | Jonathan Mark Collins | Evp Chief Financial Officer | 19,504 | 0 | 19,504 | 1.7% | 12 Aug, 2026 |
| 19 | Adrienne Elsner | Director | 19,099 | 0 | 19,099 | 1.7% | 10 Aug, 2026 |
| 20 | De La Nuez Jose Manuel Canovas | President, Insulation | 18,955 | 0 | 18,955 | 1.7% | 12 Aug, 2026 |
| 21 | Eduardo E Cordeiro | Director | 16,311 | 0 | 16,311 | 1.5% | 10 Aug, 2026 |
| 22 | Kelly Schmidt | Vice President And Controller | 15,472 | 0 | 15,472 | 1.4% | 08 Feb, 2023 |
| 23 | Alfred E Festa | Director | 13,296 | 0 | 13,296 | 1.2% | 10 Aug, 2026 |
| 24 | Ann Lizabeth Baymiller | Chief Information Officer | 8,797 | 0 | 8,797 | 0.8% | 27 Feb, 2026 |
| 25 | Paul Edward Martin | Director | 8,338 | 0 | 8,338 | 0.7% | 10 Aug, 2026 |
| 26 | Mari Doerfler | Vice President And Controller | 3,093 | 0 | 3,093 | 0.3% | 12 May, 2026 |
| 27 | Michelle T Collins | Director | 2,918 | 0 | 2,918 | 0.3% | 10 Aug, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 15 Sep, 2026 | Monaco Nicolas Del | President, Roofing | Disposed F | 856 | $128.67 | $110.14K | 26,330 | Direct |
| 15 Sep, 2026 | Todd W Fister | President And Coo | Disposed F | 1,180 | $128.67 | $151.83K | 52,138 | Direct |
| 28 Aug, 2026 | Rachel Barthelemy Marcon | President, Doors | Disposed S | 900 | $144.07 | $129.66K | 21,449 | Direct |
| 10 Aug, 2026 | Jonathan Mark Collins | Evp Chief Financial Officer | Acquired A | 19,504 | $153.80 | $3.00Mn | 19,504 | Direct |
| 10 Aug, 2026 | Rachel Barthelemy Marcon | President, Doors | Acquired A | 6,501 | $153.80 | $999.85K | 22,349 | Direct |
| 10 Aug, 2026 | De La Nuez Jose Manuel Canovas | President, Insulation | Acquired A | 3,250 | $153.80 | $499.85K | 18,955 | Direct |
| 10 Aug, 2026 | Monaco Nicolas Del | President, Roofing | Acquired A | 6,501 | $153.80 | $999.85K | 27,186 | Direct |
| 06 Aug, 2026 | Eduardo E Cordeiro | Director | Acquired A | 67 | $150.60 | $10.10K | 15,992 | Direct |
| 06 Aug, 2026 | Jose Mendez-Andino | Evp, Chief Innovation Officer | Acquired A | 77 | $150.60 | $11.63K | 24,507 | Direct |
| 06 Aug, 2026 | Adrienne Elsner | Director | Acquired A | 98 | $150.60 | $14.76K | 18,787 | Direct |
| 06 Aug, 2026 | Paul Edward Martin | Director | Acquired A | 42 | $150.60 | $6.32K | 8,042 | Direct |
| 06 Aug, 2026 | Suzanne P Nimocks | Director | Acquired A | 110 | $150.60 | $16.53K | 36,617 | Direct |
| 06 Aug, 2026 | Edward F Lonergan | Director | Acquired A | 273 | $150.60 | $41.16K | 54,377 | Direct |
| 06 Aug, 2026 | Alfred E Festa | Director | Acquired A | 68 | $150.60 | $10.20K | 12,981 | Direct |
| 07 Aug, 2026 | Michelle T Collins | Director | Acquired A | 370 | $157.10 | $58.13K | 2,918 | Direct |
| 06 Aug, 2026 | John David Williams | Director | Acquired A | 284 | $150.60 | $42.80K | 54,456 | Direct |
| 07 Aug, 2026 | Alfred E Festa | Director | Acquired A | 315 | $157.10 | $49.49K | 13,296 | Direct |
| 07 Aug, 2026 | Paul Edward Martin | Director | Acquired A | 296 | $157.10 | $46.50K | 8,338 | Direct |
| 07 Aug, 2026 | Suzanne P Nimocks | Director | Acquired A | 321 | $157.10 | $50.43K | 36,938 | Direct |
| 07 Aug, 2026 | Edward F Lonergan | Director | Acquired A | 581 | $157.10 | $91.28K | 54,958 | Direct |