1. Common stock acquired upon vesting of Performance Share Units (PSUs) and accrued dividends thereon, following certification of performance metrics.

2. Each performance share unit (PSU) represents a contingent right to receive one share of the Company's common stock.

3. Shares of common stock allocated to the reporting person's account in the Illinois Tool Works Inc. Savings & Investment Plan. Information reported as of February 12, 2024.

4. PSUs vested and became payable on February 12, 2024.