# Corning (GLW): value investors who own it | moatshark

2 value investors held Corning in their Q3 2026 13F, led by Mairs & Power, Dodge & Cox. See who bought, sold and how ownership has changed by quarter.

## 13F holders

| Manager | Portfolio | Value | Change | Quarters held |
| --- | --- | --- | --- | --- |
| Mairs & Power | 0.2% | $21.8m | Trimmed -3.2% | 53 |
| Appaloosa | 0.0% | $0k | Sold out | 6 |
| Dodge & Cox | 0.0% | $8.9m | Trimmed -4.6% | 53 |

## Directors buying and selling (Form 4, last 12 months)

| Date | Who | Role | Bought or sold | Shares | Value |
| --- | --- | --- | --- | --- | --- |
| 2026-09-04 | Gullo Michelle L | Senior Vice President & CHRO | Sold | 9874 | $1.5m |
| 2026-08-28 | STEVERSON LEWIS A | Vice Chairman, EVP and CLAO | Sold | 13100 | $2.0m |

Source: SEC filings, via moatshark (https://www.moatshark.com/s/glw). Values traded and returns are estimates. Not investment advice. Built 2026-10-21.