GLW insider buying and SEC filings, explained
Corning Inc. · CIK 24741
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$61.0M
Planned sales (10b5-1)
$0
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Sep 4, 2026 | Sale | Michelle L Gullo (Senior Vice President & CHRO) sold 9,874 shares at about $152.29 ($1.5M). Holdings down 51% to 9,384 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 8, 2026 |
| Aug 28, 2026 | Sale | Lewis A. Steverson (Vice Chairman, EVP and CLAO) sold 13,100 shares at about $151.29 ($2.0M). Holdings down 47% to 15,052 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 31, 2026 |
| May 22, 2026 | Sale | Jaymin Amin (SVP and Chief Tech. Officer) sold 27,395 shares at about $192.14 ($5.3M). Holdings down 22% to 94,400 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 26, 2026 |
| May 15, 2026 | Sale | Avery H Nelson III (President / COO) sold 20,000 shares at $195.93 ($3.9M). Holdings down 22% to 70,059 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 18, 2026 |
| May 13, 2026 | Sale | Ronald L Verkleeren (SVP Emerging Innovations Group) sold 10,000 shares at about $207.77 ($2.1M). Holdings down 17% to 48,143 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 14, 2026 |
| May 11, 2026 | Sale | Michaune D. Tillman (SVP and General Counsel) sold 3,260 shares at about $207.02 ($675K). Holdings down 24% to 10,174 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 12, 2026 |
| May 11, 2026 | Sale | Soumya Seetharam (Senior Vice President & CDIO) sold 20,000 shares at about $206.23 ($4.1M). Holdings down 44% to 25,570 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 12, 2026 |
| May 11, 2026 | Sale | John Z Zhang (Exec. Vice President & CCDO) sold 10,000 shares at about $198.34 ($2.0M). Holdings down 66% to 5,138 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 12, 2026 |
| May 8, 2026 | Sale | Lewis A. Steverson (Vice Chairman, EVP and CLAO) sold 27,750 shares at about $196.06 ($5.4M). Holdings down 50% to 28,152 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 8, 2026 |
| May 8, 2026 | Sale | Michelle L Gullo (Senior Vice President & CHRO) sold 5,315 shares at about $189.03 ($1.0M). Holdings down 12% to 37,636 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 8, 2026 |
| May 8, 2026 | Sale | Stefan Becker (SVP, Finance & Corp Controller) sold 21,000 shares at $188.08 ($3.9M). Holdings down 74% to 7,263 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 8, 2026 |
| May 7, 2026 | Sale | Edward A Schlesinger (CFO) sold 22,562 shares at about $186.08 ($4.2M). Holdings down 26% to 65,264 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 7, 2026 |
| May 6, 2026 | Sale | John Z Zhang (Exec. Vice President & CCDO) sold 15,000 shares at about $184.67 ($2.8M). Holdings down 50% to 15,138 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 6, 2026 |
| Feb 12–13, 2026 | Sale | Michelle L Gullo (Senior Vice President & CHRO) sold 631 shares in 2 share classes directly and indirectly (by spouse) between Feb 12 and Feb 13 at about $131.44 ($83K). Direct holdings of Common Stock down 2% to 36,000 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 13, 2026 |
| Feb 12, 2026 | Sale | John Z Zhang (Exec. Vice President & CCDO) sold 1,531 shares at about $133.75 ($205K). Holdings down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 12, 2026 |
| Feb 11, 2026 | Sale | Avery H Nelson III (President / COO) sold 1,583 shares at about $128.74 ($204K). Holdings down 3% to 59,788 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 12, 2026 |
| Feb 10, 2026 | Sale | Lewis A. Steverson (Vice Chairman, EVP and CLAO) sold 15,366 shares at about $130.22 ($2.0M). Holdings down 82% to 3,461 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 11, 2026 |
| Feb 9, 2026 | Sale | Avery H Nelson III (President / COO) sold 6,262 shares at about $129.79 ($813K). Holdings down 9% to 61,371 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 11, 2026 |
| Feb 9, 2026 | Sale | Jordana Daryl Kammerud (SVP) sold 30,000 shares at about $127.67 ($3.8M). Holdings down 92% to 2,772 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 9, 2026 |
| Feb 9, 2026 | Sale | Eric S Musser (Retired President) sold 15,000 shares at about $130.25 ($2.0M). Holdings down 75% to 4,926 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 9, 2026 |
| Feb 2, 2026 | Sale | Michael Paul O'Day (SVP and GM, Optical Comm.) sold 5,051 shares at about $110.52 ($558K). Holdings down 14% to 29,915 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 2, 2026 |
| Feb 2, 2026 | Sale | Eric S Musser (Retired President) sold 25,000 shares at about $110.00 ($2.8M). Holdings down 56% to 19,926 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 2, 2026 |
| Jan 29, 2026 | Sale | Michelle L Gullo (Senior Vice President & CHRO) sold 44 shares indirectly (by spouse) at $102.40 ($5K). Holdings by spouse down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 30, 2026 |
| Jan 29, 2026 | Sale | Edward A Schlesinger (CFO) sold 21,104 shares at about $104.55 ($2.2M). Holdings down 28% to 54,780 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 29, 2026 |
| Dec 10, 2025 | Sale | Ronald L Verkleeren (SVP Emerging Innovations Group) sold 21,000 shares at about $94.69 ($2.0M). Holdings down 38% to 34,500 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 11, 2025 |
| Dec 10, 2025 | Sale | Soumya Seetharam (Senior Vice President & CDIO) sold 16,547 shares at about $90.78 ($1.5M). Holdings down 50% to 16,756 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 11, 2025 |
| Oct 31, 2025 | Sale | Lewis A. Steverson (Vice Chairman, EVP and CLAO) sold 23,142 shares at about $89.05 ($2.1M). Holdings down 57% to 17,575 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 3, 2025 |
| Oct 31, 2025 | Sale | Edward A Schlesinger (CFO) sold 20,893 shares at $91.25 ($1.9M). Holdings down 24% to 66,959 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 3, 2025 |
105 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
Follow GLW in the Insider Ledger app
Get the appA plain-English brief of insider purchases, 8-Ks and red flags at the companies you pick. No account needed.