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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1. Name and Address of Reporting Person * CHAPMAN CARL L   2. Issuer Name and Ticker or Trading Symbol VECTREN CORP [VVC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) Chairman, President & CEO (Last) (First) (Middle) ONE VECTREN SQUARE, P. O. BOX 209 3. Date of Earliest Transaction (Month/Day/Year) 12/31/2017 (Street) EVANSVILLE, IN 47708 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 12/31/2017   M   114,114.466 A $ 0 (1) 163,925.799 D   Common Stock 12/31/2017   D   114,114.466 D $ 64.94 49,811.333 D   Common Stock               2,801.8994 I 401K Plan

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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

Phantom Stock

$ 0

12/31/2017

M

114,114.466

(2)

(2)

Common Stock

114,114.466

(1)

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
CHAPMAN CARL L ONE VECTREN SQUARE P. O. BOX 209 EVANSVILLE, IN 47708			Chairman, President & CEO

Signatures

/s/Ronald E. Christian		01/02/2018
**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)	On December 31, 2017, the stock unit award was settled for cash based on the average closing price of Vectren's common stock for the three consecutive trading days immediately preceding December 25, 2017.
(2)	The stock unit award was acquired pursuant to the Vectren Corporation At-Risk Compensation Plan and was subject to forfeiture as provided by the Plan and the Plan grant agreement. The lifting of restrictions and the application of the forfeiture provisions were dependent upon performance metrics during a measuring period from January 1, 2014 through December 31, 2016 and subject to continued employment until December 31, 2017, except in limited circumstances as described in the Plan and the Plan grant agreement. The conditions associated with the award have been fulfilled and it has now been settled. This transaction was approved in accordance with Rule 16b-3.

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