UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 Commission file number: 001-15169 PERFICIENT, INC. (Exact name of registrant as specified in its charter) Delaware No. 74-2853258 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark one) ☑ Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the fiscal year ended December 31, 2020 ☐ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission file number 001-15169 PERFICIENT, INC. (Exact Name of Registrant as Specified in Its Charter) (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identificati ...