Ownership Submission
FORM 3
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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
OMB APPROVAL
OMB Number: 3235-0104
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
  KKR Credit Advisors (US) LLC
2. Date of Event Requiring Statement (Month/Day/Year)
03/31/2015
3. Issuer Name and Ticker or Trading Symbol
Willbros Group, Inc.\NEW\ [WG]
(Last)
(First)
(Middle)
555 CALIFORNIA STREET, 50TH FLOOR, 
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

SAN FRANCISCO, CA 94104
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock, $0.05 par value 10,125,410 (1)
I
See footnotes (1) (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(Month/Day/Year)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
KKR Credit Advisors (US) LLC
555 CALIFORNIA STREET, 50TH FLOOR
SAN FRANCISCO, CA 94104
    X    
Kohlberg Kravis Roberts & Co. L.P.
9 WEST 57TH STREET SUITE 4200
NEW YORK, NY 10019
    X    
KKR Management Holdings L.P.
9 WEST 57TH STREET 41ST FLOOR
NEW YORK, NY 10019
    X    
KKR Management Holdings Corp
9 WEST 57TH STREET 41ST FLOOR
NEW YORK, NY 10019
    X    
KKR Group Holdings L.P.
9 WEST 57TH STREET 41ST FLOOR
NEW YORK, NY 10019
    X    
KKR Group Ltd
9 WEST 57TH STREET 41ST FLOOR
NEW YORK, NY 10019
    X    
KKR & Co. L.P.
9 WEST 57TH STREET
SUITE 4200
NEW YORK, NY 10019
    X    
KKR Management LLC
9 WEST 57TH STREET 41ST FLOOR
NEW YORK, NY 10019
    X    
KRAVIS HENRY R
C/O KOHLBERG KRAVIS ROBERTS & CO
9 WEST 57TH ST
NEW YORK, NY 10019
    X    
ROBERTS GEORGE R
2800 SAND HILL ROAD
MENLO PARK, CA 94025
    X    

Signatures

KKR CREDIT ADVISORS (US) LLC By: /s/ Nicole J. Macarchuk Name: Nicole J. Macarchuk Title: General Counsel 04/09/2015
**Signature of Reporting Person Date

KOHLBERG KRAVIS ROBERTS & CO. L.P. By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact for William Janetschek, Chief Financial Officer 04/09/2015
**Signature of Reporting Person Date

KKR MANAGEMENT HOLDINGS L.P. By: KKR Management Holdings Corp., its general partner By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer 04/09/2015
**Signature of Reporting Person Date

KKR MANAGEMENT HOLDINGS CORP. By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer 04/09/2015
**Signature of Reporting Person Date

KKR GROUP HOLDINGS L.P. By: KKR Group Limited, its general partner By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact for William J. Janetschek, Director 04/09/2015
**Signature of Reporting Person Date

KKR GROUP LIMITED By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact for William J. Janetschek, Director 04/09/2015
**Signature of Reporting Person Date

KKR & CO. L.P. By: KKR Management LLC, its general partner By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer 04/09/2015
**Signature of Reporting Person Date

KKR MANAGEMENT LLC By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer 04/09/2015
**Signature of Reporting Person Date

HENRY R. KRAVIS By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact 04/09/2015
**Signature of Reporting Person Date

GEORGE R. ROBERTS By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact 04/09/2015
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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) Represents the aggregate number of shares of common stock, par value $0.05 per share ("Common Stock"), of Willbros Group, Inc. held in investment funds for which KKR Credit Advisors (US) LLC ("KKR Credit") or any of its subsidiaries serves as an investment advisor.
(2) Kohlberg Kravis Roberts & Co. L.P. is the holder of all of the outstanding equity interests in KKR Credit. KKR Management Holdings L.P. is the general partner of Kohlberg Kravis Roberts & Co. L.P, and KKR Management Holdings Corp. is the general partner of KKR Management Holdings L.P. KKR Group Holdings L.P. is the sole shareholder of KKR Management Holdings Corp., and KKR Group Limited is the general partner of KKR Group Holdings L.P. KKR & Co. L.P. is the sole shareholder of KKR Group Limited. KKR Management LLC is the general partner of KKR & Co. L.P. Messrs. Henry R. Kravis and George R. Roberts are the designated members of KKR Management LLC.
 
Remarks:
Each Reporting Person disclaims beneficial ownership of any securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein.  The filing of this statement shall not be deemed an admission that, for the purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise, any Reporting Person is the beneficial owner of any equity securities covered by this statement.  Exhibit List: Exhibit 24 - Powers of Attorney

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.