MAS · Masco Corp /De/

The reporting person contributed Masco Corporation common stock to an exchange fund in exchange for shares of the exchange fund.

The reporting person contributed Masco Corporation common stock to an exchange fund in exchange for shares of the exchange fund.

Grant of option under the Masco Corporation 2014 Long Term Stock Incentive Plan in transactions exempt under Rule 16b-3.

This option became exercisable in five equal annual installments commencing February 9, 2019.

Grant of option under the Masco Corporation 2024 Long Term Stock Incentive Plan in transactions exempt under Rule 16b-3.

This option is exercisable in three approximately equal annual installments commencing February 12, 2027.

Grant of option under the Masco Corporation 2014 Long Term Stock Incentive Plan in transactions exempt under Rule 16b-3.

This option became exercisable in five equal annual installments commencing February 10, 2018.

Shares reported in this column represent shares awarded in connection with the vesting of performance stock units awarded in 2023, as certified by the Compensation and Talent Committee on February 6, 2026.

Grant of option under the Masco Corporation 2024 Long Term Stock Incentive Plan in transactions exempt under Rule 16b-3.

This option is exercisable in three approximately equal annual installments commencing February 12, 2027.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $77.00 to $77.01, inclusive. The reporting person undertakes to provide to Masco Corporation, any security holder of Masco Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) and (3) to this Form 4.

Grant of option under the Masco Corporation 2024 Long Term Stock Incentive Plan in transactions exempt under Rule 16b-3.

This option is exercisable in three approximately equal annual installments commencing February 12, 2027.

Grant of option under the Masco Corporation 2024 Long Term Stock Incentive Plan in transactions exempt under Rule 16b-3.

This option is exercisable in three approximately equal annual installments commencing February 12, 2027.

Shares reported in this column represent shares awarded in connection with the vesting of performance stock units awarded in 2023, as certified by the Compensation and Talent Committee on February 6, 2026.

Shares reported in this column represent shares awarded in connection with the vesting of performance stock units awarded in 2023, as certified by the Compensation and Talent Committee on February 6, 2026.

Grant of option under the Masco Corporation 2024 Long Term Stock Incentive Plan in transactions exempt under Rule 16b-3.

This option is exercisable in three approximately equal annual installments commencing February 12, 2027.

Grant of option under the Masco Corporation 2024 Long Term Stock Incentive Plan in transactions exempt under Rule 16b-3.

This option is exercisable in three approximately equal annual installments commencing February 12, 2027.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $77.05 to $77.08, inclusive.

On December 10, 2025, the reporting person transferred, as a bona fide gift for no consideration, 10,000 shares of Masco common stock from a trust in which the reporting person and his spouse are the trustees and sole beneficiaries to a trust in which the reporting person is the sole trustee and the reporting person's spouse and children are the beneficiaries.