As of September 29, 2026, the three largest insider holders of GLW are Wendell P Weeks (Chairman, Ceo And President, 908.35K shares), Lawrence D Mcrae (Vice Chairman Corp. Dev. Off, 236.44K shares), Jaymin Amin (Svp And Chief Tech. Officer, 94.40K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Wendell P Weeks | Chairman, Ceo And President | 908,353 | 0 | 908,353 | 45.4% | 09 Jun, 2026 |
| 2 | Lawrence D Mcrae | Vice Chairman Corp. Dev. Off | 236,442 | 0 | 236,442 | 11.8% | 17 Apr, 2024 |
| 3 | Jaymin Amin | Svp And Chief Tech. Officer | 94,400 | 0 | 94,400 | 4.7% | 26 May, 2026 |
| 4 | Hansel E Ii Tookes | Other | 92,761 | 0 | 92,761 | 4.6% | 10 Feb, 2025 |
| 5 | James P Clappin | Vice Chair Strategic Advisor | 85,064 | 0 | 85,064 | 4.2% | 11 Jan, 2022 |
| 6 | Avery H Iii Nelson | Executive Vice President Coo | 70,059 | 0 | 70,059 | 3.5% | 18 May, 2026 |
| 7 | Edward A Schlesinger | Exec. Vice President And Cfo | 65,264 | 0 | 65,264 | 3.3% | 07 May, 2026 |
| 8 | Mark S Wrighton | Other | 61,621 | 0 | 61,621 | 3.1% | 08 Sep, 2025 |
| 9 | Richard T Clark | Other | 55,060 | 0 | 55,060 | 2.8% | 05 Nov, 2024 |
| 10 | Ronald L Verkleeren | Svp Emerging Innovations Group | 48,143 | 0 | 48,143 | 2.4% | 14 May, 2026 |
| 11 | Michael Paul O'Day | Svp And Gm, Optical Comm. | 39,122 | 0 | 39,122 | 2.0% | 29 Apr, 2026 |
| 12 | Robert P. France | Senior Vp, Human Resources | 37,048 | 0 | 37,048 | 1.9% | 03 May, 2023 |
| 13 | Donald W Blair | Other | 34,773 | 0 | 34,773 | 1.7% | 05 Nov, 2024 |
| 14 | Cheryl C Capps | Svp Chief Supply Chain Off. | 31,493 | 0 | 31,493 | 1.6% | 08 Feb, 2024 |
| 15 | Soumya Seetharam | Senior Vice President Cdio | 25,570 | 0 | 25,570 | 1.3% | 12 May, 2026 |
| 16 | Lewis A Steverson | Vice Chairman, Evp And Clao | 15,052 | 0 | 15,052 | 0.8% | 31 Aug, 2026 |
| 17 | David L Morse | Exec. Vp Chief Tech. Officer | 13,912 | 0 | 13,912 | 0.7% | 18 May, 2022 |
| 18 | R Tony Tripeny | Exec. Vice President And Cfo | 13,215 | 0 | 13,215 | 0.7% | 04 May, 2022 |
| 19 | Jordana Daryl Kammerud | Svp | 12,269 | 0 | 12,269 | 0.6% | 16 Apr, 2026 |
| 20 | Michaune D Tillman | Svp And General Counsel | 10,174 | 0 | 10,174 | 0.5% | 12 May, 2026 |
| 21 | Michelle L Gullo | Senior Vice President Chro | 9,384 | 0 | 9,384 | 0.5% | 08 Sep, 2026 |
| 22 | Li Fang | Svp, Corning Intl Nbd, Solar | 8,725 | 0 | 8,725 | 0.4% | 15 May, 2026 |
| 23 | Martin J Curran | Exec. Vp Innovation Officer | 0 | 7,898 | 7,898 | 0.4% | 21 Nov, 2024 |
| 24 | Stefan Becker | Svp, Finance Corp Controller | 7,137 | 0 | 7,137 | 0.4% | 14 May, 2026 |
| 25 | John P Jr Bayne | Svp Gm, Mobile Consumer Elec. | 0 | 6,700 | 6,700 | 0.3% | 22 Nov, 2024 |
| 26 | John Z Zhang | Exec. Vice President Ccdo | 5,138 | 0 | 5,138 | 0.3% | 12 May, 2026 |
| 27 | Eric S Musser | President And Coo | 4,926 | 0 | 4,926 | 0.2% | 09 Feb, 2026 |
| 28 | Anne Mullins | Senior Vice President Cdio | 1,931 | 0 | 1,931 | 0.1% | 17 May, 2023 |
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 |
|---|---|---|---|---|---|---|---|---|
| 04 Sep, 2026 | Michelle L Gullo | Senior Vice President Chro | Disposed S | 9,874 | $152.29 | $1.50Mn | 9,384 | Direct |
| 28 Aug, 2026 | Lewis A Steverson | Vice Chairman, Evp And Clao | Disposed S | 13,100 | $151.29 | $1.98Mn | 15,052 | Direct |
| 30 Jun, 2026 | Roger W. Jr. Ferguson | Director | Acquired A | 161 | $255.43 | $41.12K | 16,722 | Direct |
| 30 Jun, 2026 | Kevin J Martin | Director | Acquired A | 137 | $255.43 | $34.99K | 20,234 | Direct |
| 30 Jun, 2026 | Robert F Jr Cummings | Director | Acquired A | 161 | $255.43 | $41.12K | 130,762 | Direct |
| 30 Jun, 2026 | Stephanie Burns | Director | Acquired A | 161 | $255.43 | $41.12K | 26,769 | Direct |
| 22 Jun, 2026 | Michelle L Gullo | Senior Vice President Chro | Disposed F | 18,378 | $209.83 | $3.86Mn | 19,258 | Direct |
| 09 Jun, 2026 | Wendell P Weeks | Chairman, Ceo And President | Acquired M | 100,000 | $27.03 | $2.70Mn | 1,008,353 | Direct |
| 09 Jun, 2026 | Wendell P Weeks | Chairman, Ceo And President | Disposed S | 100,000 | $186.46 | $18.65Mn | 908,353 | Direct |
| 09 Jun, 2026 | Wendell P Weeks | Chairman, Ceo And President | Disposed M | 100,000 | $0.00 | $0 | 49,849 | Direct |
| 22 May, 2026 | Jaymin Amin | Svp And Chief Tech. Officer | Acquired M | 7,917 | $27.00 | $213.76K | 121,795 | Direct |
| 22 May, 2026 | Jaymin Amin | Svp And Chief Tech. Officer | Disposed S | 27,395 | $192.14 | $5.26Mn | 94,400 | Direct |
| 22 May, 2026 | Jaymin Amin | Svp And Chief Tech. Officer | Disposed M | 7,917 | $0.00 | $0 | 0 | Direct |
| 15 May, 2026 | Avery H Iii Nelson | Executive Vice President Coo | Disposed S | 20,000 | $195.93 | $3.92Mn | 70,059 | Direct |
| 14 May, 2026 | Li Fang | Svp, Corning Intl Nbd, Solar | Acquired M | 8,725 | $19.65 | $171.45K | 8,725 | Direct |
| 14 May, 2026 | Li Fang | Svp, Corning Intl Nbd, Solar | Disposed M | 8,725 | $0.00 | $0 | 0 | Direct |
| 13 May, 2026 | Stefan Becker | Svp, Finance Corp Controller | Disposed G | 126 | $0.00 | $0 | 7,137 | Direct |
| 13 May, 2026 | Ronald L Verkleeren | Svp Emerging Innovations Group | Disposed S | 10,000 | $207.77 | $2.08Mn | 48,143 | Direct |
| 11 May, 2026 | Soumya Seetharam | Senior Vice President Cdio | Disposed S | 20,000 | $206.23 | $4.12Mn | 25,570 | Direct |
| 11 May, 2026 | John Z Zhang | Exec. Vice President Ccdo | Disposed S | 10,000 | $198.34 | $1.98Mn | 5,138 | Direct |