Investigate / reported ownership
GLW
Corning Inc
6 tracked reported owners · snapshot updated 2026-10-04. Delayed disclosures, not live holdings or an investment recommendation.
Who reports owning GLW?
Select a manager to inspect their portfolio. Reports may cover different quarters; portfolio weights describe disclosed long 13F holdings, not total economic exposure.
| #↑ | Manager | % Port. | History | Value | Shares |
|---|---|---|---|---|---|
| 1 | Stephen Mandel | 4.3% | 2q | $697M | 2,728,058 |
| 2 | Joel Greenblatt | 0.1% | 37q | $94M | 368,501 |
| 3 | Mairs & Power Funds | 0.2% | 40q | $22M | 85,447 |
| 4 | Dodge & Cox Funds | <0.1% | 40q | $9M | 34,665 |
| 5 | Lee Ainslie | <0.1% | 15q | $1M | 4,774 |
Go beyond ownership.
Corning supplies mobile-device cover materials, display glass, optical fiber, cable and connectivity, life-sciences products, and automotive clean-air technologies and technical glass.
Question to investigate: Can Corning keep turning its materials-science capabilities into profitable growth while managing input costs and supply constraints?
Company research reviewed 2026-10-02; a dated source-linked starting point, not the investors’ stated reasons.
Understand the business and investment case →Filing dates and original SEC sources
Reported position changes
Net disclosed share changes—not individual trades or execution dates. NEW has no prior-position percentage comparison; EXIT weight refers to the previous report.
| Manager | Move | % Port. | Δ Shares | Value | Filed |
|---|---|---|---|---|---|
| Stephen Mandel | TRIM | 4.3% | -27% | $697M | Aug 14, 2026 |
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Long US 13F disclosures omit shorts and can be amended. CUSIP 219350105. No current price, valuation or manager motive is inferred.