13D Filing: Monarch Alternative Capital and Resolute Energy Corp (REN)

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934*

(Amendment No. 1)

Resolute
Energy Corporation

(Name of Issuer)

Common Stock, par value $0.0001

(Title of Class of Securities)

76116A306

(CUSIP Number
of Class of Securities)

Michael Kelly, Esq.

Monarch Alternative Capital LP

535 Madison Avenue

New
York, NY 10022

Telephone: (212) 554-1700

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

Copies to:

Mark
Cognetti, Esq.

Michael Brandt, Esq.

Willkie Farr & Gallagher LLP

787 Seventh Avenue

New
York, NY 10019-6099

(212) 728-8000

February 8, 2018

(Date
of Event which Requires Filing of this Schedule)

If the filing person has
previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following
box:  ☐

NOTE: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 240.13d-7 for
other parties to whom copies are to be sent.

*	The remainder of this cover page shall be filled out for a reporting persons initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be
deemed to be filed for the purpose of Section 18 of the Securities Exchange Act of 1934, as amended (the Act) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of
the Act (however, see the Notes).