John Z Zhang insider trades: Corning (GLW) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where John reports to the SEC
Open-market buys and sales
17 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| May 11, 2026 | GLW | ↓ Sell | 10,000 | $198.34 | $2.0M | Direct | May 12, 2026 (1d) |
| May 6, 2026 | GLW | ↓ Sell | 15,000 | $184.67 | $2.8M | Direct | May 6, 2026 (0d) |
| Feb 12, 2026 | GLW | ↓ Sell | 1,531 | $133.75 | $205K | Direct | Feb 12, 2026 (0d) |
| Aug 12, 2025 | GLW | ↓ Sell | 1,212 | $65.53 | $79K | Direct | Aug 12, 2025 (0d) |
| May 28, 2025 | GLW | ↓ Sell | 9,610 | $49.29 | $474K | Direct | May 29, 2025 (1d) |
| May 12, 2025 | GLW | ↓ Sell | 8,000 | $46.91 | $375K | Direct | May 13, 2025 (1d) |
| Feb 18, 2025 | GLW | ↓ Sell | 14,111 | $52.78 | $745K | Direct | Feb 19, 2025 (1d) |
| Nov 13, 2024 | GLW | ↓ Sell | 5,175 | $48.36 | $250K | Direct | Nov 14, 2024 (1d) |
| Aug 13, 2024 | GLW | ↓ Sell | 12,918 | $39.73 | $513K | Direct | Aug 15, 2024 (2d) |
| May 2, 2024 | GLW | ↓ Sell | 12,546 | $33.42 | $419K | Direct | May 2, 2024 (0d) |
| Feb 15, 2024 | GLW | ↓ Sell | 6,607 | $32.02 | $212K | Direct | Feb 16, 2024 (1d) |
| May 5, 2023 | GLW | ↓ Sell | 15,000 | $31.45 | $472K | Direct | May 9, 2023 (4d) |
| Feb 16, 2023 | GLW | ↓ Sell | 5,744 | $35.52 | $204K | Direct | Feb 17, 2023 (1d) |
| Feb 3, 2023 | GLW | ↓ Sell | 4,655 | $36.00 | $168K | Direct | Feb 6, 2023 (3d) |
| Feb 4, 2022 | GLW | ↓ Sell | 13,320 | $42.01 | $560K | Direct | Feb 4, 2022 (0d) |
| May 3, 2021 | GLW | ↓ Sell | 19,413 | $44.61 | $866K | Direct | May 5, 2021 (2d) |
| Mar 1, 2021 | GLW | ↓ Sell | 11,409 | $39.23 | $448K | Direct | Mar 2, 2021 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other GLW insiders
Open-market trades in the last 12 months
About John Z Zhang's insider trades
John Z Zhang is Exec. Vice President & CCDO at Corning (GLW). Since Mar 1, 2021, John has reported no open-market purchases and 17 sales worth $10.7M on SEC Form 4. In the last 12 months: 3 sales ($5.0M).
Their filings also include option exercises (18 filings), shares withheld for taxes (13 filings), grants and awards (12 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every GLW insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.