#1 On February 16, 2021, the Reporting Person received a grant of 10,764 performance stock units ("PSUs"). Following the three-year performance period, a conversion factor of 1.95 was approved by the Company's Compensation Committee on February 21, 2024 and applied to the PSUs, resulting in an award of 20,936 shares, subject to tax withholding. The number in this cell reflects the after-tax number of shares delivered to the Reporting Person.

#2 Represents a grant of RSUs granted by the Company's Compensation Committee on February 21, 2024. The RSUs will vest on or about February 21, 2027. Additional terms apply in the event of the holder's termination, death, disability or retirement.

#1 Shares acquired through the Belden Inc. 2021 Employee Stock Purchase Plan (the "Plan"). The Plan is broadly available to employees of Belden Inc. and its subsidiaries. Pursuant to the terms of the Plan, the purchase price is 85% of the lesser of (i) the price at the beginning of the offering period (January 1, 2024) or (ii) the price at the end of the offering period (June 30, 2024). Employees elect their level of participation and the purchases are funded via payroll deductions through the offering period.

#1 The Reporting Person was awarded 22,486 performance stock units (PSUs) on August 17, 2021. Following the performance period, it was determined based on the total stockholder return during the performance period that the PSUs earned a conversion factor of 2.0. Therefore, the PSUs converted to 44,856 restricted stock units (RSUs). Assuming continued employment, the RSUs will vest on August 17, 2025.

#1 This represents the difference between the number of SARs exercised (537) and the number of shares issued as a result of the exercise (44). The number of shares to be issued under a SAR exercise is determined by multiplying the number of SARs being exercised by the difference between the FMV on the date of exercise ($87.14) and the exercise price ($72.57). Additional shares are then withheld to satisfy the Company's tax withholding obligations.