Calzaretta Christopher P. 4

What Happened

• Christopher P. Calzaretta, SVP & CFO of Armstrong World Industries (AWI), had 2,408 restricted stock units convert into common shares on Feb 27, 2026 (valued at $173.50/share, total $417,788). To cover tax withholding on the vesting, 1,077 of those shares were withheld (disposed) at $173.50/share ($186,860), leaving a net 1,331 shares retained by the insider.
• This was a vesting/conversion of RSUs (an award), not an open-market purchase or a voluntary sale.

Key Details

• Transaction date: February 27, 2026; Form 4 filed March 2, 2026 (timely).
• Conversion: 2,408 RSUs -> 2,408 common shares at $173.50 (value ~$417,788).
• Tax withholding: 1,077 shares withheld to satisfy tax obligations (value ~$186,860).
• Net shares retained: 1,331 (2,408 - 1,077).
• Shares owned after transaction: Not stated in this filing.
• Relevant footnotes: RSUs convert one-for-one; the withheld shares satisfy tax liabilities from vesting; the RSUs were granted Mar 1, 2023 and vested on the third anniversary (per the 2022 Equity and Cash Incentive Plan); derivative price reported as $0 consistent with RSU conversion.
• Transaction codes: M = conversion/exercise of derivative (RSU conversion), F = shares withheld for tax withholding.

Context

• This is routine compensation-related vesting and tax withholding (not an open-market sale or buy). Withholding shares to cover taxes is a common, administrative step and does not necessarily indicate a trading signal.