X0306 4 2017-05-05 0 0000049826 ILLINOIS TOOL WORKS INC ITW 0001124194 CROWN SUSAN 222 NORTH LASALLE STREET SUITE 2000 CHICAGO IL 60601 1 0 0 0 Common Stock 2017-05-05 4 A 0 1100 139.6 A 47589 D Common Stock 4000 I See ftn. Common Stock 4000 I See ftn. Phantom Stock Units Common Stock 5890 5890 D Includes 10,544 shares of deferred stock under the ITW Director's Deferred Fee Plan as of May 5, 2017. Owned by Reporting Person's spouse. Owned by a trust of which Reporting Person's children are beneficiaries. Represents units of phantom stock held by the Reporting Person as of May 5, 2017 under the Phantom Stock Plan for non-officer directors. Each unit is equal in value to one share of common stock. The units are not transferrable and have no voting rights. Additional units are credited in amounts equivalent to cash dividends paid on the common stock reported as of May 5, 2017. The Reporting Person disclaims beneficial ownership of the shares described in Footnotes 2 and 3 except to the extent of her pecuniary interest therein. /s/ Susan Crown 2017-05-08