As of the latest Form 4 filed Jun 23, 2026.
What Corning Incorporated insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 65 most recent filings for GLW.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-06-23 | 2026-06-22 | Gullo Michelle L Senior Vice President & CHRO | FTax | −18.4K | $209.83 | $3.86M | No | Form 4 ↗ |
| 2026-06-09 | 2026-06-09 | WEEKS WENDELL P Chairman, CEO and President | SSale | −100K | $186.46 | $18.6M | No | Form 4 ↗ |
| 2026-06-09 | 2026-06-09 | WEEKS WENDELL P, Chairman, CEO and President | MExercise | +100K | $27.03 | $2.70M | No | Form 4 ↗ |
| 2026-05-26 | 2026-05-22 | Amin Jaymin SVP and Chief Tech. Officer | SSale | −27.4K | $192.14 | $5.26M | No | Form 4 ↗ |
| 2026-05-26 | 2026-05-22 | Amin Jaymin, SVP and Chief Tech. Officer | MExercise | +7.92K | $27.00 | $214K | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-15 | Nelson Avery H III Executive Vice President & COO | SSale | −20.0K | $195.93 | $3.92M | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-14 | Fang Li SVP, Corning Intl & NBD, Solar | MExercise | +8.72K | $19.65 | $171K | No | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Verkleeren Ronald L SVP Emerging Innovations Group | SSale | −10.0K | $207.77 | $2.08M | No | Form 4 ↗ |
| 2026-05-14 | 2026-05-13 | Becker Stefan SVP, Finance & Corp Controller | GGift | −126.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-12 | 2026-05-11 | TILLMAN MICHAUNE D SVP and General Counsel | SSale | −3.26K | $207.02 | $675K | No | Form 4 ↗ |
| 2026-05-12 | 2026-05-11 | Seetharam Soumya Senior Vice President & CDIO | SSale | −20.0K | $206.23 | $4.12M | No | Form 4 ↗ |
| 2026-05-12 | 2026-05-11 | Zhang John Z Exec. Vice President & CCDO | SSale | −10.0K | $198.34 | $1.98M | No | Form 4 ↗ |
| 2026-05-08 | 2026-05-08 | STEVERSON LEWIS A Vice Chairman, EVP and CLAO | SSale | −27.8K | $196.06 | $5.44M | No | Form 4 ↗ |
| 2026-05-08 | 2026-05-08 | Gullo Michelle L Senior Vice President & CHRO | SSale | −5.32K | $189.03 | $1.00M | No | Form 4 ↗ |
| 2026-05-08 | 2026-05-08 | Becker Stefan SVP, Finance & Corp Controller | SSale | −21.0K | $188.08 | $3.95M | No | Form 4 ↗ |
| 2026-05-07 | 2026-05-07 | Schlesinger Edward A Exec. Vice President and CFO | SSale | −22.6K | $186.08 | $4.20M | No | Form 4 ↗ |
| 2026-05-06 | 2026-05-06 | Zhang John Z Exec. Vice President & CCDO | SSale | −15.0K | $184.67 | $2.77M | No | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | TILLMAN MICHAUNE D SVP and General Counsel | FTax | −2.95K | $159.96 | $471K | No | Form 4 ↗ |
| 2026-05-01 | 2026-04-29 | Becker Stefan SVP, Finance & Corp Controller | FTax | −2.79K | $151.90 | $425K | No | Form 4 ↗ |
| 2026-05-01 | 2026-04-29 | Becker Stefan, SVP, Finance & Corp Controller | MExercise | +429.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-01 | 2026-04-29 | Becker Stefan, SVP, Finance & Corp Controller | MExercise | +1.07K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-01 | 2026-04-29 | Becker Stefan, SVP, Finance & Corp Controller | MExercise | +619.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-01 | 2026-04-29 | Becker Stefan, SVP, Finance & Corp Controller | MExercise | +674.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-29 | 2026-04-28 | O'Day Michael Paul SVP and GM, Optical Comm. | FTax | −3.50K | $153.05 | $535K | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | WEEKS WENDELL P Chairman, CEO and President | FTax | −166K | $168.27 | $27.9M | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | WEEKS WENDELL P, Chairman, CEO and President | MExercise | +104K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | WEEKS WENDELL P, Chairman, CEO and President | MExercise | +236K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Zhang John Z Exec. Vice President & CCDO | FTax | −31.4K | $168.27 | $5.29M | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Zhang John Z, Exec. Vice President & CCDO | MExercise | +18.9K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Zhang John Z, Exec. Vice President & CCDO | MExercise | +42.7K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Verkleeren Ronald L SVP Emerging Innovations Group | FTax | −22.8K | $168.27 | $3.84M | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Verkleeren Ronald L, SVP Emerging Innovations Group | MExercise | +14.3K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Verkleeren Ronald L, SVP Emerging Innovations Group | MExercise | +32.6K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | STEVERSON LEWIS A Vice Chairman, EVP and CLAO | FTax | −49.8K | $168.27 | $8.38M | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | STEVERSON LEWIS A, Vice Chairman, EVP and CLAO | MExercise | +31.1K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | STEVERSON LEWIS A, Vice Chairman, EVP and CLAO | MExercise | +71.1K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Seetharam Soumya Senior Vice President & CDIO | FTax | −17.6K | $168.27 | $2.97M | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Seetharam Soumya, Senior Vice President & CDIO | MExercise | +13.7K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Seetharam Soumya, Senior Vice President & CDIO | MExercise | +31.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Schlesinger Edward A Exec. Vice President and CFO | FTax | −30.7K | $168.27 | $5.17M | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Schlesinger Edward A, Exec. Vice President and CFO | MExercise | +44.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Schlesinger Edward A, Exec. Vice President and CFO | MExercise | +19.1K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | O'Day Michael Paul SVP and GM, Optical Comm. | FTax | −8.41K | $168.27 | $1.42M | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | O'Day Michael Paul, SVP and GM, Optical Comm. | MExercise | +6.24K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | O'Day Michael Paul, SVP and GM, Optical Comm. | MExercise | +14.1K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Nelson Avery H III Executive Vice President & COO | FTax | −28.7K | $168.27 | $4.84M | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Nelson Avery H III, Executive Vice President & COO | MExercise | +17.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Nelson Avery H III, Executive Vice President & COO | MExercise | +41.2K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Kammerud Jordana Daryl SVP | FTax | −9.02K | $168.27 | $1.52M | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Kammerud Jordana Daryl, SVP | MExercise | +5.67K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Kammerud Jordana Daryl, SVP | MExercise | +12.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Gullo Michelle L Senior Vice President & CHRO | FTax | −6.20K | $168.27 | $1.04M | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Gullo Michelle L, Senior Vice President & CHRO | MExercise | +3.79K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Gullo Michelle L, Senior Vice President & CHRO | MExercise | +9.36K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Becker Stefan SVP, Finance & Corp Controller | FTax | −22.9K | $168.27 | $3.85M | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Becker Stefan, SVP, Finance & Corp Controller | MExercise | +13.7K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Becker Stefan, SVP, Finance & Corp Controller | MExercise | +31.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Amin Jaymin SVP and Chief Tech. Officer | FTax | −24.8K | $168.27 | $4.17M | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Amin Jaymin, SVP and Chief Tech. Officer | MExercise | +35.6K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Amin Jaymin, SVP and Chief Tech. Officer | MExercise | +15.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-27 | 2026-02-26 | WEEKS WENDELL P Chairman, CEO and President | GGift | −16.7K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-27 | 2026-02-26 | WEEKS WENDELL P, Chairman, CEO and President | SSale | −138K | $155.37 | $21.4M | No | Form 4 ↗ |
| 2026-02-27 | 2026-02-26 | WEEKS WENDELL P, Chairman, CEO and President | MExercise | +138K | $27.00 | $3.71M | No | Form 4 ↗ |
| 2024-05-02 | 2024-05-02 | Zhang John Z SVP&GM Display, MCE & Asia | SSale | −12.5K | $33.42 | $419K | No | Form 4 ↗ |
| 2024-05-02 | 2024-05-01 | STEVERSON LEWIS A EVP and CLAO | SSale | −30.0K | $33.05 | $991K | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also GLW’s full analysis or the market-wide insider trading feed. The tabs above jump to GLW’s other SEC data.
Source: SEC Form 4 filings for GLW, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.