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 *

Guc William J 		2. Issuer Name and Ticker or Trading Symbol

INTEGRYS ENERGY GROUP, INC. [ TEG ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

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

700 NORTH ADAMS STREET, P. O. BOX 19001 		3. Date of Earliest Transaction (MM/DD/YYYY)

3/18/2015
(Street)

GREEN BAY, WI 54307-9001
(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   3/18/2015     M    946   A $49.40   4925.9818   D    
Common Stock   3/18/2015     M    2295   A $53.24   7220.9818   D    
Common Stock   3/18/2015     M    4486   A $55.23   11706.9818   D    
Common Stock   3/18/2015     S    7727   D $73.4555   (1) 3979.9818   D    
Common Stock                  2983.0148   I   By Employee Stock Ownership Plan  

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 (Right to buy)   $49.40   3/18/2015     M         946    2/10/2012   (2) 2/10/2021   Common Stock   946   $0.00   0   D    
Employee Stock Option (Right to buy)   $53.24   3/18/2015     M         2295    2/9/2013   (2) 2/9/2022   Common Stock   2295   $0.00   0   D    
Employee Stock Option (Right to Buy)   $55.23   3/18/2015     M         4486    2/13/2015   (2) 2/13/2024   Common Stock   4486   $0.00   0   D    
Performance Rights   $0.00   (3)                  1/1/2016   (3) 3/15/2016   Common Stock   1844     1844   D    
Performance Rights   $0.00   (3)                  1/1/2017   (3) 3/15/2017   Common Stock   1794     1794   D    
Phantom Stock Unit     (4)                    (5)   (5) Common Stock   4828.259     4828.259   D    
Restricted Stock Units 2012     (6)                  2/9/2013   2/9/2016   Common Stock   151.8533     151.8533   D    
Restricted Stock Units 2013     (6)                  2/14/2014   2/14/2017   Common Stock   286.758     286.758   D    
Restricted Stock Units 2014     (6)                  2/13/2015   2/13/2018   Common Stock   409.79     409.79   D    
Restricted Stock Units 2015     (6)                  2/12/2016   2/12/2019   Common Stock   1951     1951   D    

Explanation of Responses:
( 1)  The weighted average sale price reflects multiple transactions at prices ranging from $73.45 - $73.49.
( 2)  Effective October 24, 2014, the Board of Directors accelerated the vesting of all outstanding stock options; all outstanding stock options are fully vested.
( 3)  Performance stock rights represent the right to receive shares of common stock of the Company, in the event certain performance goals are satisfied. These goals are based on Company performance against an established industry benchmark, over a three year performance period. The final award of shares issued can be between 0% and 200% of the reported target award.
( 4)  These phantom stock units convert to common stock on a one-for-one basis.
( 5)  Upon retirement or termination of service, distribution of phantom stock units will commence in January of the year that is both (1) following the calendar year in which service terminates with the Company, and (2) at least six months following termination, or later if the participant selected a later date.
( 6)  Each restricted stock unit represent a contingent right to receive one share of Company common stock. The restricted stock units vest in four equal annual installments beginning on the exercisable date.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Guc William J
700 NORTH ADAMS STREET
P. O. BOX 19001
GREEN BAY, WI 54307-9001

Vice President & Treasurer

Signatures
Dane E. Allen, as Power of Attorney for Mr. Guc 3/19/2015
** 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).
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