13D Filing: Metalmark Capital II LLC and Jones Energy Inc. (JONE)

Page 1 of 25

You can access the original SEC filing by clicking here.

Ownership Summary Table

Name Sole Voting Power Shared Voting Power Sole Dispositive Power Shared Dispositive Power Aggregate Amount Owned Power Percent of Class
MCP (C) II Jones Intermediate 0 6,640,334 0 6,640,334 6,640,334 7.2%
MCP II Co-Investment Jones Intermediate 0 1,698,458 0 1,698,458 1,698,458 1.8%
MCP II Jones Intermediate 0 3,182,376 0 3,182,376 3,182,376 3.4%
MCP II (TE) AIF Jones Intermediate 0 2,435,994 0 2,435,994 2,435,994 2.6%
MCP II (Cayman) AIF Jones Intermediate 0 2,986,349 0 2,986,349 2,986,349 3.2%
MCP II Executive Fund Jones Intermediate 0 311,272 0 311,272 311,272 0.3%
Metalmark Capital Partners (Silo) II 0 6,646,439 0 6,646,439 6,646,439 7.2%
Metalmark Capital Partners II Co-Investment 0 1,699,414 0 1,699,414 1,699,414 1.8%
Metalmark Capital Partners II 0 3,184,891 0 3,184,891 3,184,891 3.4%
MCP II (TE) AIF 0 2,437,876 0 2,437,876 2,437,876 2.6%
Metalmark Capital Partners Cayman II 0 2,988,866 0 2,988,866 2,988,866 3.2%
Metalmark Capital Partners II Executive Fund 0 311,489 0 311,489 311,489 0.3%
Metalmark Capital Partners II GP 0 17,268,975 0 17,268,975 17,268,975 18.7%
Metalmark Capital Holdings 0 17,268,975 0 17,268,975 17,268,975 18.7%
Metalmark Capital II 0 17,385,484 0 17,385,484 17,385,484 18.8%

Page 1 of 25 – SEC Filing

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

(Rule 13d-101)

Under the Securities Exchange Act of 1934

Amendment No. 6

Jones Energy,
Inc.

(Name of Issuer)

Class A common stock, par value $0.001 per share

(Title of Class of Securities)

48019R108

(CUSIP Number)

Metalmark Capital II LLC

1177 Avenue of the Americas, 40th Floor

New York, NY 10036

Attention: Kenneth F. Clifford

Telephone: (212) 823-1915

Copies to:

Richard
Aftanas, Esq.

Kirkland & Ellis LLP

601 Lexington Avenue

New
York, New York 10022

Telephone: (212) 446-4800

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

October 16, 2017

(Date
of Event which Requires Filing of this Statement)

If the filing person has
previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d1(e), 240.13d1(f) or 240.13d1(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 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 (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).

Follow Jones Energy Inc. (INDEXDJX:JONE)

Page 1 of 25