THIRD AMENDMENT TO

AMENDED AND RESTATED 2006 UNIT PLAN

OF

NMH INVESTMENT, LLC

THIS THIRD AMENDMENT TO the NMH INVESTMENT, LLC AMENDED AND RESTATED 2006 UNIT
PLAN (the “Plan”), dated August 13, 2012, is hereby adopted and agreed to by the
Management Committee of NMH Investment, LLC, a Delaware limited liability
company (the “Company”) by unanimous written consent pursuant to Section 7(a) of
the Plan.

1. Amendments to the Plan.

(a) Section 2 of the Plan is hereby amended by:

(i) adding the following definitions of “Class G Unit” and “Class H Unit”:

“Class G Unit” shall mean a Class G Unit as defined in the LLC Agreement.

“Class H Unit” shall mean a Class H Unit as defined in the LLC Agreement.

(ii) deleting the existing definition of “Unit” in its entirety and replacing it
with the following:

“Unit” shall mean a Preferred Unit, Class A Unit, Class B Unit, Class C Unit,
Class D Unit, Class E Unit, Class F Unit, Class G Unit or Class H Unit.

(b) Section 3 of the Plan is hereby deleted in its entirety and replaced with
the following:

SECTION 3. Units Subject to the Plan.

“The total number of Preferred Units which may be issued under the Plan is
65,000, the total number of Class A Units which may be issued under the Plan is
650,000, the total number of Class B Units which may be issued under the Plan is
192,500, the total number of Class C Units which may be issued under the Plan is
202,000, the total number of Class D Units which may be issued under the Plan is
388,881, the total number of Class E Units which may be

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issued under the Plan is 6,375, the total number of Class F Units which may be
issued is 5,396,388, the total number of Class G Units which may be issued is
130,000 and the total number of Class H Units which may be issued is 1,200,000.
Units which are subject to Awards which terminate or lapse without any payment
in respect thereof may be granted again under the Plan.”

2. Ratification. All other paragraphs, provisions, and clauses in the Plan
remain in full force and effect as originally written.

3. Defined Terms. Certain capitalized terms not defined herein shall have the
meanings given to such terms in the Plan.

4. Governing Law; Binding Agreement. The validity, construction, and effect of
this amendment to the Plan shall be determined in accordance with the laws of
the State of New York applicable to contracts made and to be performed therein.

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