FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Zimmerman Michael R. 		2. Issuer Name and Ticker or Trading Symbol

ILLINOIS TOOL WORKS INC [ ITW ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
Executive Vice President
(Last)          (First)          (Middle)

ILLINOIS TOOL WORKS INC., 155 HARLEM AVENUE 		3. Date of Earliest Transaction (MM/DD/YYYY)

2/27/2017
(Street)

GLENVIEW, IL 60025
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock   2/27/2017     M    5017   A $55.71   7643   D    
Common Stock   2/27/2017     S (1)    5017   D $132   2626   D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option   $78.59                    2/14/2015   (2) 2/14/2024   Common Stock   6600.0     6600   D    
Employee Stock Option   $55.71   2/27/2017     M         5017    2/10/2013   2/10/2022   Common Stock   5017.0   $0   5000   D    
Employee Stock Option   $63.25                    2/15/2014   2/14/2023   Common Stock   9325.0     9325   D    
Employee Stock Option   $98.26                    2/13/2016   (2) 2/13/2025   Common Stock   13362.0     13362   D    
Performance Restricted Stock Unit (granted 2/13/15)   (3) $0.0                      (4)   (4) Common Stock   2798.0     2798   D    
Employee Stock Option   $91.88                    2/12/2017   (2) 2/12/2026   Common Stock   15817.0     15817   D    
Performance Restricted Stock Unit (granted 2/12/2016)   (3) $0.0                      (4)   (4) Common Stock   3446.0     3446   D    
Employee Stock Option   $128.0                    2/10/2018   (2) 2/10/2027   Common Stock   19567.0     19567   D    
Performance Share Units (granted 2/10/17)   (3) $0.0                      (4)   (4) Common Stock   2050.0     2050   D    

Explanation of Responses:
( 1)  The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person and approved by the issuer effective November 29, 2016.
( 2)  Options vest in four (4) equal installments beginning one year from date of grant.
( 3)  Each performance restricted stock unit (PRSU) and performance share unit (PSU) represents a contingent right to receive one share of the Company's common stock.
( 4)  Each PRSU and PSU vests 100% three years from the date of grant if performance goals are met.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Zimmerman Michael R.
ILLINOIS TOOL WORKS INC.
155 HARLEM AVENUE
GLENVIEW, IL 60025

Executive Vice President

Signatures
Michael R. Zimmerman, by Janet O. Love, Deputy General Counsel & Assistant Secretary, Attorney-In-Fact on File 3/1/2017
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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