CRA INTERNATIONAL, INC. 10-Q

ITEM 5. Other Information None. ITEM 6. EXHIBIT INDEX Item No. Description 3.1 Amended and Restated Articles of Organization, as amended by the Articles of Amendment to our Articles of Organization filed on May 6, 2005 (incorporated by reference to Exhibit 3.1 to our annual report on Form 10-K filed on February 27, 2020). 3.2 Amended and Restated By-Laws, as amended (incorporated by reference to Exhibit 3.2 to our current report on Form 8-K filed on January 31, 2011). 31.1 Certification of Principal Executive Officer, pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 . 31.2 Certification of Principal Financial Officer, pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 . 32.1 Certification of Principal Executive Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 . 32.2 Certification of Principal Financial Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 . 101 The following financial statements from CRA International, Inc.’s Quarterly Report on Form 10-Q for the fiscal quarter ended September 26, 2020, formatted in Inline XBRL (eXtensible Business Reporting Language), as follows: (i) Condensed Consolidated Statements of Operations (unaudited) for the fiscal quarters and the fiscal year to date periods ended September 26, 2020 and September 28, 2019, (ii) Condensed Consolidated Statements of Comprehensive Income (unaudited) for the fiscal quarters ended September 26, 2020 and September 28, 2019, (iii) Condensed Consolidated Balance Sheets (unaudited) as at September 26, 2020 and December 28, 2019, (iv) Condensed Consolidated Statements of Cash Flows (unaudited) for the fiscal quarters ended September 26, 2020 and September 28, 2019, (v) Condensed Consolidated Statement of Shareholders’ Equity (unaudited) for the fiscal quarters ended September 26, 2020 and September 28, 2019, and (vi) Notes to Condensed Consolidated Financial Statements (Unaudited). 104 Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101). 28 Table of Contents SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. ​ CRA INTERNATIONAL, INC. ​ ​ ​ Date: October 29, 2020 By: /s/ PAUL A. MALEH ​ ​ ​ ​ ​ Paul A. Maleh ​ ​ President and Chief Executive Officer ​ ​ ​ Date: October 29, 2020 By: /s/ DANIEL K. MAHONEY ​ ​ ​ ​ ​ Daniel K. Mahoney ​ ​ Chief Financial Officer, Executive Vice President and Treasurer ​ ​ ​ 29