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 * KKR Credit Advisors (US) LLC   2. Issuer Name and Ticker or Trading Symbol Willbros Group, Inc.\NEW\ [WG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 555 CALIFORNIA STREET, 50TH FLOOR,  3. Date of Earliest Transaction (Month/Day/Year) 06/01/2018 (Street) SAN FRANCISCO, CA 94104 4. If Amendment, Date Original Filed(Month/Day/Year) 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 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, $0.05 par value 06/01/2018   J(1)   10,125,410 D $ 0.6 (2) 0 I See footnotes (3) (4)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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

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
Kohlberg Kravis Roberts & Co. L.P. C/O KOHLBERG KRAVIS ROBERTS & CO. L.P. 9 WEST 57TH STREET, SUITE 4200 NEW YORK, NY 10019
KKR Management Holdings L.P. C/O KOHLBERG KRAVIS ROBERTS & CO. L.P. 9 WEST 57TH STREET, SUITE 4200 NEW YORK, NY 10019
KKR Management Holdings Corp C/O KOHLBERG KRAVIS ROBERTS & CO. L.P. 9 WEST 57TH STREET, SUITE 4200 NEW YORK, NY 10019
KKR Group Holdings L.P. C/O KOHLBERG KRAVIS ROBERTS & CO. L.P. 9 WEST 57TH STREET, SUITE 4200 NEW YORK, NY 10019
KKR Group Ltd C/O KOHLBERG KRAVIS ROBERTS & CO. L.P. 9 WEST 57TH STREET, SUITE 4200 NEW YORK, NY 10019
KKR & Co. L.P. C/O KOHLBERG KRAVIS ROBERTS & CO. L.P. 9 WEST 57TH STREET, SUITE 4200 NEW YORK, NY 10019
KKR Management LLC C/O KOHLBERG KRAVIS ROBERTS & CO. L.P. 9 WEST 57TH STREET, SUITE 4200 NEW YORK, NY 10019
KRAVIS HENRY R C/O KOHLBERG KRAVIS ROBERTS & CO. L.P. 9 WEST 57TH STREET, SUITE 4200 NEW YORK, NY 10019
ROBERTS GEORGE R C/O KOHLBERG KRAVIS ROBERTS & CO. L.P. 2800 SAND HILL ROAD, SUITE 200 MENLO PARK, CA 94025

Signatures

KKR CREDIT ADVISORS (US) LLC By: /s/ Nicole J. Macarchuk Name: Nicole J. Macarchuk Title: General Counsel		06/05/2018
**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 J. Janetschek, Chief Financial Officer		06/05/2018
**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 Gallagher Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer		06/05/2018
**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		06/05/2018
**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		06/05/2018
**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		06/05/2018
**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		06/05/2018
**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		06/05/2018
**Signature of Reporting Person		Date
HENRY R. KRAVIS By: /s/ Terence P. Gallagher Name: Terence Gallagher Title: Attorney-in-fact		06/05/2018
**Signature of Reporting Person		Date
GEORGE R. ROBERTS By: /s/ Terence P. Gallagher Name: Terence Gallagher Title: Attorney-in-fact		06/05/2018
**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 June 1, 2018, Primoris Services Corporation ("Parent"), acquired the Issuer pursuant to that certain Agreement and Plan of Merger entered into by and among the Issuer, Parent and Waco Acquisition Vehicle, Inc., a wholly-owned subsidiary of Parent ("Merger Sub"), dated as of March 27, 2018 (the "Merger Agreement"). In accordance with the Merger Agreement, Merger Sub merged with and into the Issuer, with the Issuer surviving such merger as a wholly-owned subsidiary of Parent (the "Merger").
(2)	At the effective time of the Merger, each outstanding share of common stock, par value $0.05 per share, of the Issuer ("Common Stock") (other than certain excluded shares), automatically converted into the right to receive $0.60 per share in cash, without interest.
(3)	Represents the aggregate number of shares of Common Stock held in investment funds for which KKR Credit Advisors (US) LLC ("KKR Credit") or any of its subsidiaries serves as an investment advisor.
(4)	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. 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.

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