WESCO SCREEN COMPANY INC

contributions are permitted, which may consist of stocks, bonds, property or other securities. 4 WESCO Distribution, Inc. Retirement Savings Plan Notes to Financial Statements The Company matches contributions made by employees into the Plan at an amount equal to 100 % of a participant's eligible elective deferrals up to 3 % of the participant's eligible compensation and 50 % of the next 4 % of eligible compensation. For certain highly compensated employees, matching contributions are made into a separate non-qualified deferred compensation plan instead of the Plan. The Company performs a true-up calculation at the end of each plan year so that the full employer matching contribution is made for all participants of the Plan. Any necessary additional matching contribution is made in the sub

inue automatic deferral rate increases after reaching the maximum deferral rate, or elect automatic increases at a different rate, up to a maximum of 3 %. Vesting Participants are fully vested in the value of their contributions and related investment income at all times. Participants hired prior to January 1, 2022 vest in their allocated share of employer contributions at 0 % for less than one year of service, 25 % for one year of service, and 100 % for two or more years of service. Participants hired on or after January 1, 2022 vest in their allocated share of employer contributions at 0 % for less than two years of service and 100 % for two or more years of service. Distributions A participant may not withdraw any amount from their vested account balance unless they are age 59½, retire,

the accompanying Statement of Changes in Net Assets Available for Benefits. The Plan includes a negative enrollment policy. Under this policy, if an individual does not submit an automatic enrollment waiver or elect a deferral rate, the employee will be automatically enrolled in the Plan at a 3 % deferral rate with the ability to opt-out. Under the Plan's annual increase program, participant contributions automatically increase at a rate of 1 % annually each April 1 until the deferral rate equals 7 %. Participants may opt-out of automatic annual increases, elect to continue automatic deferral rate increases after reaching the maximum deferral rate, or elect automatic increases at a different rate, up to a maximum of 3 %. Vesting Participants are fully vested in the value of their contribu

te 6) 1,979,199 1,560,743 Dividends and other income 20,073,602 16,461,650 Total additions 483,054,593 417,026,646 Deductions Distributions to participants 203,061,836 202,528,600 Administrative expenses 1,474,854 1,265,618 Total deductions 204,536,690 203,794,218 Net increase in net assets available for benefits before transfers 278,517,903 213,232,428 Transfers Net transfers in to (out of) plan (Note 1) 24,307,559 ( 13,774,178 ) Net increase in net assets available for benefits after transfers 302,825,462 199,458,250 Net assets available for benefits Beginning of year 1,915,429,360 1,715,971,110 End of year $ 2,218,254,822 $ 1,915,429,360 The accompanying notes are an integral part of these financial statements. 3 WESCO Distribution, Inc. Retirement Savings Plan Notes to Financial Statem