• Corning average gross margin for 2023 was 30.59%, a 10.27% increase from 2022.
• Corning average gross margin for 2022 was 34.09%, a 3.84% decline from 2021.
• Corning average gross margin for 2021 was 35.45%, a 16.19% decline from 2020.

Gross margin can be defined as a company's total sales revenue minus its cost of goods sold, divided by the total sales revenue, expressed as a percentage.