UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K Annual Report Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 For the Fiscal Year Ended December 31, 2018 Commission File Number: 0-12507 ARROW FINANCIAL CORPORATION (Exact name of registrant as specified in its charter) New York 22-2448962 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 250 GLEN STREET, GLENS FALLS, NEW YORK 12801 (Address of principal ...