UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 __________________________________________ Commission file number 1-10427 ROBERT HALF INTERNATIONAL INC. (Exact name of registrant as specified in its charter) Delaware 94-1648752 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE A ...