X0508 4 2025-04-30 0 0001352010 EPAM Systems, Inc. EPAM 0001761897 Rockwell Edward C/O EPAM SYSTEMS, INC. 41 UNIVERSITY DRIVE, SUITE 202 NEWTOWN PA 18940 0 1 0 0 SVP/General Counsel 0 EPAM Common Stock 2025-04-30 5 P 0 E 56.234 133.37 A 9619.234 D EPAM Common Stock 2025-10-31 5 P 0 E 55.683 134.69 A 9674.091 D The reporting person is voluntarily reporting the acquisition of the Issuer's Common Stock pursuant to the EPAM Systems, Inc. 2021 Employee Stock Purchase Plan (the "ESPP"), for the ESPP purchase period that is the six months ending on the Transaction Date (the "Purchase Period"). This transaction is also exempt from Rule 16b-3(c). In accordance with the ESPP, these shares were purchased at the lesser of (i) 85% of the fair market value of such shares of Common Stock on the first trading day of the Purchase Period and (ii) 85% of the fair market value of such shares of Common Stock on the last day of the Purchase Period. Includes a deduction of 0.826 shares to reflect the cumulative impact of de minimis rounding adjustments of fractional shares as reported in a prior Form 4 and prior Forms 5 filed for the reporting person related to acquisition of Common Stock under the ESPP. /s/ Kate Pytlewski as Attorney-in-Fact 2025-11-10