The $3.49M in open-market sales by two senior executives is modest relative to Corning's market cap and lacks a 10b5-1 plan designation. While cluster sales by C-suite insiders warrant attention, the dollar value is below the threshold for a bearish signal. Monitor for any subsequent larger sales or a pattern of sustained insider selling in future filings.
Price Chart
Executive Summary
Two senior Corning executives (Vice Chairman/CLAO Lewis Steverson and CHRO Michelle Gullo) sold a combined $3.49M of GLW stock in open-market sales over a one-week window. The sales total ~0.1% of Corning's market cap, falling at the low end of the modest threshold. While the cluster involves C-suite insiders, the dollar amounts are not material relative to the company's size, and no 10b5-1 plan indication is present, making this a routine portfolio diversification event rather than a bearish signal.
Key Financial Metrics
Key Facts
- Vice Chairman/CLAO Lewis Steverson sold 13.1K shares at ~$151.29 for $1.98M on 2026-08-28
- CHRO Michelle Gullo sold 9.9K shares at ~$152.29 for $1.50M on 2026-09-04
- Total insider sales of $3.49M represent ~0.1% of Corning's market cap
- No 10b5-1 plan indication; both sales are open-market (code S)
- No insider buying in the cluster to offset the selling
Financial Impact
Total insider sales of $3.49M, approximately 0.1% of market cap
Risk Factors
- Insider sales could accelerate if executives perceive headwinds, though current amounts are routine
- No insider buying to signal confidence in the company's near-term outlook
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-GLW-1788897719559 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 21, 2026 4d ago | Institutional Cluster | $123.99 $123.69 | ▼ −0.24% | ▲ +0.28% | $128.46 (+3.61%) |
Sep 11, 2026 6w ago | 8-K / 424B5 | $143.60 $143.57 | ▲ +0.02% | ▼ −0.44% | $128.46 (+10.54%) |
Sep 8, 2026 6w ago | Insider Cluster | $168.46 $163.12 | ▼ −3.17% | ▼ −2.57% | $128.46 (−23.74%) |
Aug 14, 2026 10w ago | Institutional Cluster | $165.99 $173.21 | ▲ +4.35% | ▲ +4.82% | $128.46 (−22.61%) |
Jul 28, 2026 12w ago | 8-K | $126.01 $124.05 | ▼ −1.56% | ▼ −0.02% | $128.46 (+1.95%) |
May 26, 2026 21w ago | Insider Cluster | $190.81 $182.93 | ▼ −4.13% | ▼ −4.68% | $128.46 (−32.67%) |
May 15, 2026 23w ago | 8-K | $178.47 $175.83 | ▼ −1.48% | ▼ −0.83% | $128.46 (−28.02%) |
May 14, 2026 23w ago | Insider Cluster | $191.86 $178.47 | ▼ −6.98% | ▼ −6.92% | $128.46 (−33.04%) |
May 6, 2026 24w ago | Insider Cluster | $181.78 $186.30 | ▲ +2.49% | ▲ +1.66% | $128.46 (−29.33%) |
May 6, 2026 24w ago | 8-K | $181.48 $182.36 | ▲ +0.48% | ▲ +0.82% | $128.46 (−29.21%) |
US Market Status
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