🕵️ Corning Inc /NY ($GLW)
SEC insider & ownership activity, last 12 months · CIK 24741 · every row links its SEC filing
Over the last 12 months insiders sold $113.6M with no open-market buying against it. Wendell Weeks sold $40.0M in discretionary trades (Feb–Jun). Samsung Display Co., Ltd. trimmed 8.3% → 7.9%. No red-flag 8-Ks in the window.
🚨 1 signal active —
planned-vs-executed verdicts, pre-event flags, and cluster context live in the
API and the
alerts bot.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 15 sellers, $113.6M (35 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Wendell Weeks | 0 | – | 2 | $40.0M | Jun 9, 2026 |
| Eric Musser | 0 | – | 3 | $13.7M | Feb 9, 2026 |
| Lewis Steverson | 0 | – | 4 | $11.5M | Aug 28, 2026 |
| Edward Schlesinger | 0 | – | 3 | $8.3M | May 7, 2026 |
| Jaymin Amin | 0 | – | 2 | $6.6M | May 22, 2026 |
| Soumya Seetharam | 0 | – | 2 | $5.6M | May 11, 2026 |
| Stefan Becker | 0 | – | 2 | $5.1M | May 8, 2026 |
| John Zhang | 0 | – | 3 | $5.0M | May 11, 2026 |
| Avery H. Nelson III | 0 | – | 3 | $4.9M | May 15, 2026 |
| Ronald Verkleeren | 0 | – | 2 | $4.1M | May 13, 2026 |
| Jordana Kammerud | 0 | – | 1 | $3.8M | Feb 9, 2026 |
| Michelle L. Gullo | 0 | – | 5 | $2.6M | Sep 4, 2026 |
| Fang Li | 0 | – | 1 | $1.1M | Feb 4, 2026 |
| Michaune Tillman | 0 | – | 1 | $675K | May 11, 2026 |
| Michael O'Day | 0 | – | 1 | $558K | Feb 2, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Samsung Display Co., Ltd. | 7.9% | 13G | Sep 10, 2025 | filing ↗ | |
| Vanguard Capital Management | 6.8% | 13G | Apr 29, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Michelle Gullo | $1.5M | Sep 4, 2026 | filing ↗ |
| Lewis Steverson | $2.0M | Aug 28, 2026 | filing ↗ |
| Wendell Weeks | $18.6M | Jun 9, 2026 | filing ↗ |
| Jaymin Amin | $5.3M | May 22, 2026 | filing ↗ |
| Avery H. Nelson III | $3.9M | May 15, 2026 | filing ↗ |
| Ronald Verkleeren | $2.1M | May 13, 2026 | filing ↗ |
| Michaune Tillman | $675K | May 11, 2026 | filing ↗ |
| John Zhang | $2.0M | May 11, 2026 | filing ↗ |
| Soumya Seetharam | $4.1M | May 11, 2026 | filing ↗ |
| Michelle Gullo | $1.0M | May 8, 2026 | filing ↗ |
| Lewis Steverson | $5.4M | May 8, 2026 | filing ↗ |
| Stefan Becker | $3.9M | May 8, 2026 | filing ↗ |
| Edward Schlesinger | $4.2M | May 7, 2026 | filing ↗ |
| John Zhang | $2.8M | May 6, 2026 | filing ↗ |
| Wendell Weeks | $21.4M | Feb 26, 2026 | filing ↗ |
| Michelle Gullo | $77K | Feb 13, 2026 | filing ↗ |
| Michelle Gullo | $77K | Feb 13, 2026 | filing ↗ |
| Trevor Gullo | $6K | Feb 12, 2026 | filing ↗ |
| John Zhang | $205K | Feb 12, 2026 | filing ↗ |
| Avery Nelson | $204K | Feb 11, 2026 | filing ↗ |
| Avery Nelson | $813K | Feb 10, 2026 | filing ↗ |
| Lewis Steverson | $2.0M | Feb 10, 2026 | filing ↗ |
| Eric Musser | $2.0M | Feb 9, 2026 | filing ↗ |
| Jordana Kammerud | $3.8M | Feb 9, 2026 | filing ↗ |
| Fang Li | $1.1M | Feb 4, 2026 | filing ↗ |
| Michael O'Day | $558K | Feb 2, 2026 | filing ↗ |
| Eric Musser | $2.8M | Feb 2, 2026 | filing ↗ |
| Trevor Gullo | $5K | Jan 29, 2026 | filing ↗ |
| Edward Schlesinger | $2.2M | Jan 29, 2026 | filing ↗ |
| Ronald Verkleeren | $2.0M | Dec 10, 2025 | filing ↗ |
| Soumya Seetharam | $1.5M | Dec 10, 2025 | filing ↗ |
| Lewis Steverson | $2.1M | Oct 31, 2025 | filing ↗ |
| Edward Schlesinger | $1.9M | Oct 31, 2025 | filing ↗ |
| Stefan Becker | $1.1M | Oct 29, 2025 | filing ↗ |
| Eric Musser | $9.0M | Oct 29, 2025 | filing ↗ |
| Jaymin Amin | $1.4M | Sep 17, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Other events (8.01) | Sep 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 11, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 4, 2026 | filing ↗ |
| Earnings (2.02) | Jul 28, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 15, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | May 6, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 6, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 4, 2026 | filing ↗ |
| Shareholder vote (5.07) | Apr 30, 2026 | filing ↗ |
| Earnings (2.02) | Apr 28, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 28, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 27, 2026 | filing ↗ |
| Earnings (2.02) | Jan 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 28, 2026 | filing ↗ |
| Earnings (2.02) | Oct 28, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 28, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 7, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 7, 2025 | filing ↗ |