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 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Hartnett John 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 (Month/Day/Year) 10/20/2017 (Street) GLENVIEW, IL 60025 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction 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 10/20/2017   M   6,533 A $ 55.71 18,622 D   Common Stock 10/20/2017   S(1)   6,533 D $ 155 12,089 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction 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 (Month/Day/Year)

7. Title and Amount of Underlying Securities (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

$ 55.71

10/20/2017

M

6,533

02/10/2013

02/10/2022

Common Stock

6,533

$ 0

0

D

Employee Stock Option

$ 63.25

02/15/2014

02/15/2023

Common Stock

28,823

28,823

D

Employee Stock Option

$ 78.59

02/14/2015(2)

02/14/2024

Common Stock

24,202

24,202

D

Employee Stock Option

$ 91.88

02/12/2017(2)

02/12/2026

Common Stock

19,980

19,980

D

Employee Stock Option

$ 98.26

02/13/2016(2)

02/13/2025

Common Stock

19,436

19,436

D

Performance Restricted Stock Unit (granted 2/12/2016) (3)

$ 0

(4)

(4)

Common Stock

4,353

4,353

D

Performance Restricted Stock Unit (granted 2/13/15) (3)

$ 0

(4)

(4)

Common Stock

4,070

4,070

D

Performance Share Units (granted 2/10/17) (3) (5)

$ 0

(4)

(4)

Common Stock

2,477

2,477

D

Employee Stock Option

$ 128

02/10/2018(2)

02/10/2027

Common Stock

23,294

23,294

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Hartnett John R. ILLINOIS TOOL WORKS INC. 155 HARLEM AVENUE GLENVIEW, IL 60025			Executive Vice President

Signatures

John R. Hartnett, by Janet O. Love, Deputy General Counsel & Assistant Secretary, Attorney-In-Fact on File		10/24/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person and approved by the issuer effective June 12, 2017.
(2)	Options vest in four (4) equal annual 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.
(5)	PSUs accrue dividends in shares of common stock, subject to fulfillment of vesting period and performance goals; the PSUs shown include dividend equivalents accrued to date.

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