Insiders who reported open-market trades in the last 12 months at the companies John Z. Zhang files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
Wendell P. Weeks - $40.01M in GLW purchases and sales in the last 12 months
Eric S. Musser - $13.72M in GLW purchases and sales in the last 12 months
Lewis A. Steverson - $11.48M in GLW purchases and sales in the last 12 months
John Z. Zhang is a corporate insider, tracked as Exec. Vice President & CCDO of CORNING INC /NY (GLW). InsiderAlpha holds 9 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did John Z. Zhang last file a Form 4?
The most recent primary Form 4 on record is dated 12 May 2026, one of 9 filings going back to 2024.
Has John Z. Zhang been buying or selling stock?
Recorded transactions: 0 open-market purchases and 5 open-market sales ($5.29M) across all tracked filings.
John Z. Zhang is Exec. Vice President & CCDO of CORNING INC /NY (GLW). 9 SEC Form 4 filings on record going back to 2024, most recently on 12 May 2026. Most recent open-market trade: sold $1.98M of GLW on 12 May 2026. Lifetime open-market sales: $5.29M.
Recent transactions
13
The latest 13 SEC Form 4 transactions reported by John Z. Zhang.
InsiderAlpha's records for John Z. Zhang go back to 2024: 9 primary Form 4 filings, an average of 3.0 per year. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
