X0306 4 2017-02-28 0 0001094348 Mattersight Corp MATR 0001676756 Cammarata Rosaria 200 W. MADISON STREET SUITE 3100 CHICAGO IL 60606 0 1 0 0 VP and Controller Common Stock 2017-02-28 4 F 0 621 3.55 D 11912 D This is not an open market sale of securities. This is a disposition of shares to the issuer in the form of share withholding upon vesting of common stock, to satisfy mandatory tax withholding obligations. The disposition occurred pursuant to an equity incentive plan and was approved in advance in the manner provided in Rule 16b-3(e) under the Securities Exchange Act of 1934. Rosaria Cammarata 2017-03-02