Document:

exv10w2

Exhibit 10.2

TAX RECEIVABLE AGREEMENT

by and among

AURORA DIAGNOSTICS, INC.,

THE SUMMIT FUNDS NAMED HEREIN,

THE SUMMIT GPs NAMED HEREIN,

THE SB SHAREHOLDERS NAMED HEREIN,

THE KB SHAREHOLDERS NAMED HEREIN,

and

THE MANAGEMENT INVESTORS NAMED HEREIN,

dated as of ____________, 2010

 

 

TAX RECEIVABLE AGREEMENT

     This TAX RECEIVABLE AGREEMENT (as amended from time to time, this “Agreement”), dated as of
________, 2010, is hereby entered into by and among Aurora Diagnostics, Inc., a Delaware
corporation (the “Corporation”); Summit Ventures VI-A, L.P., Summit VI Advisors Fund, L.P., Summit
VI Entrepreneurs Fund, L.P., Summit Investors VI, L.P., and Summit Partners Private Equity Fund
VII-A, L.P., each a Delaware limited partnership (collectively, the “Summit Funds”); Summit
Partners VI (GP), L.P. and Summit Partners PE VII, L.P., each a Delaware limited partnership
(collectively, the “Summit GPs”); Summit Ventures VI-B, L.P. and Summit Partners Private Equity
Fund VII-B, L.P., each a Delaware limited partnership (collectively, the “SB Shareholders”); KRG
Capital Fund IV, L.P., a Delaware limited partnership, KRG Capital Fund IV-A, L.P., a Delaware
partnership, KRG Capital Fund IV (FF), L.P., a Delaware partnership, KRG Capital Fund IV (PA),
L.P., a Delaware limited partnership, and KRG Co-Investment, L.L.C., a Delaware limited liability
company (collectively, the “KB Shareholders”); and James C. New, Martin J. Stefanelli, Christopher
Jahnle, Kirk A. Rebane, Fred Ferrara, Greg Marsh, Michael Null, Michael Grattendick and Deanna
Shackley (collectively, the “Management Investors”). Capitalized terms used and not otherwise
defined herein have the meanings set forth in Article I.

RECITALS

     WHEREAS, on the date hereof but prior to execution of this Agreement, the Summit Funds, the
Summit GPs, the SB Shareholders, the KB Shareholders, and the Management Investors (collectively,
the “Members”) directly or indirectly held membership interests (the “Units”) in Aurora Diagnostics
Holdings, LLC, a Delaware limited liability company formed on May 22, 2006 (“Aurora”), which was
classified as a partnership for United States federal income tax purposes;

     WHEREAS, the Summit Blockers and the KRG Blocker merged with and into the Corporation, and
then Aurora merged with and into the Corporation, with the Corporation surviving, under a series of
transactions pursuant to an overall integrated plan (the “Merger”);

     WHEREAS, as of closing of the Merger (“Closing Date”), Aurora and certain of its direct and
indirect subsidiaries had tax basis in amortizable goodwill and other intangible assets described
in Section 197 of the Code (“Closing Date Tax Basis”);

     WHEREAS, as a result of the Merger, the Corporation may utilize the amortization,
depreciation, and/or other recovery of cost basis for Tax purposes, including the reduction of
taxable gain on sale or disposition of property, attributable to the Closing Date Tax Basis to
affect the income, gain, loss, expense and other Tax items of the Corporation and result in Tax
benefits and savings (the “Basis Recovery”);

     WHEREAS, in connection with the Merger, the Summit Funds, the Summit GPs, the SB Shareholders,
the KB Shareholders, and the Management Investors are receiving common stock in the Corporation
(“Common Shares”) and rights to receive payments from the Corporation for Tax benefits or savings
arising out of Basis Recovery and related basis adjustments (“TRA Rights”) as set forth herein;

     WHEREAS, the income, gain, loss, expense, and other Tax items of the Corporation will be
affected by (i) Basis Recovery, (ii) Boot Basis Adjustments (as defined below) and (iii) any
interest imputed under Section 1272, 1274, 483 or other provision of the Code and any similar
provision of state and local tax law with respect to the Corporation’s payment obligations under
this Agreement and the Merger (the “Imputed Interest”); and

 

 

     WHEREAS, the parties to this Agreement desire to make certain arrangements with respect to the
actual or deemed effect of Basis Recovery, Boot Basis Adjustments, and Imputed Interest on the
liability of the Corporation for Taxes.

     NOW, THEREFORE, in consideration of the foregoing and the respective covenants and agreements
set forth herein, and intending to be legally bound hereby, the parties hereto agree as follows:

ARTICLE I

DEFINITIONS

      Section 1.1 Definitions. As used in this Agreement, the terms set forth in
this Article I shall have the following meanings (such meanings to be equally applicable to both
the singular and plural forms of the terms defined).

     “Affiliate” means, with respect to any Person, any other Person that directly or
indirectly, through one or more intermediaries, Controls, is Controlled by, or is under common
Control with, such first Person.

     “Affiliated Institution” means with respect to any Indemnified Person, any investment
fund, institutional investor or other financial intermediary with which such Indemnified Person is
Affiliated or of which such Indemnified Person is a member, partner or employee.

     “Agreed Rate” means LIBOR plus 100 basis points.

     “Agreement” is defined in the Preamble of this Agreement.

     “Amended Schedule” is defined in Section 2.3(b) of this Agreement.

     “Aurora” has the meaning set forth in the Recitals to this Agreement.

     “Basis Recovery” has the meaning set forth in the Recitals to this Agreement.

     “Beneficial Owner” means, with respect to a security, any Person who directly or
indirectly, through any contract, arrangement, understanding, relationship or otherwise, has or
shares: (i) voting power, which includes the power to vote, or to direct the voting of, such
security and/or (ii) investment power, which includes the power to dispose of, or to direct the
disposition of, such security. The terms “Beneficially Own” and “Beneficial
Ownership” shall have correlative meanings.

     “Board” means the Board of Directors of the Corporation.

     “Boot Basis Adjustments” means the adjustment to the tax basis of assets, held
directly or indirectly by the Corporation, under Section 362 of the Code and, in each case,
comparable sections of state, local and foreign tax laws, as a result of the payments made to the
Members pursuant to this Agreement.

     “Business Day” means Monday through Friday of each week, except that a legal holiday
recognized as such by the government of the United States of America or the State of New York shall
not be regarded as a Business Day.

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     “Catch-Up Payment” has the meaning set forth in Section 3.1(a) of this Agreement.

     “Change of Control” means the occurrence of any of the following events:

     (i) any Person or any group of Persons acting together which would constitute a “group”
for purposes of Section 13(d) of the Securities and Exchange Act of 1934, or any successor
provisions thereto, excluding a group of Persons which includes one or more Affiliates of
Summit Partners, L.P., a Delaware limited partnership, and one or more Affiliates of the KB
Shareholders, is or becomes the Beneficial Owner, directly or indirectly, of securities of
the Corporation representing more than 50% of the combined voting power of the
Corporation’s, as applicable, then outstanding voting securities; or

     (ii) the following individuals cease for any reason to constitute a majority of the
number of directors of the Corporation then serving: individuals who, on the Closing Date,
constitute the Board and any new director whose appointment or election by the Board or
nomination for election by the Corporation’s shareholders was approved or recommended by a
vote of at least two-thirds (2/3) of the directors then still in office who either were
directors on the Closing Date or whose appointment, election or nomination for election was
previously so approved or recommended by the directors referred to in this clause (ii); or

     (iii) there is consummated a merger or consolidation of the Corporation with any other
corporation or other entity, and, immediately after the consummation of such merger or
consolidation, either (x) the Board immediately prior to the merger or consolidation does
not constitute at least a majority of the board of directors of the company surviving the
merger or, if the surviving company is a Subsidiary, the ultimate parent thereof, or (y) the
voting securities of the Corporation immediately prior to such merger or consolidation do
not continue to represent or are not converted into more than 50% of the combined voting
power of the then outstanding voting securities of the Person resulting from such merger or
consolidation or, if the surviving company is a Subsidiary, the ultimate parent thereof; or

     (iv) the shareholders of the Corporation approve a plan of complete liquidation or
dissolution of the Corporation or there is consummated an agreement or series of related
agreements for the sale or other disposition, directly or indirectly, by the Corporation of
all or substantially all of the Corporation’s assets, other than such sale or other
disposition by the Corporation of all or substantially all of the Corporation’s assets to an
entity, at least 50% of the combined voting power of the voting securities of which are
owned by shareholders of the Corporation in substantially the same proportions as their
ownership of the Corporation immediately prior to such sale.

Notwithstanding the foregoing, except with respect to clause (ii) and clause (iii)(x) above, a
“Change of Control” shall not be deemed to have occurred by virtue of the consummation of any
transaction or series of integrated transactions immediately following which the record holders of
the shares of the Corporation immediately prior to such transaction or series of transactions
continue to have substantially the same proportionate ownership in, and own substantially all of
the shares of, an entity which owns all or substantially all of the assets of the Corporation
immediately following such transaction or series of transactions.

     “Closing Date” has the meaning set forth in the Recitals to this Agreement.

     “Closing Date Basis Recovery Letter” is defined in Section 2.1 of this Agreement.

     “Closing Date Tax Basis” has the meaning set forth in the Recitals to this Agreement.

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     “Code” means the Internal Revenue Code of 1986, as amended.

     “Committee” means the committee established pursuant to Section 7.13.

     “Common Shares” has the meaning set forth in the Recitals to this Agreement.

     “Control” means the possession, direct or indirect, of the power to direct or cause
the direction of the management and policies of a Person, whether through ownership of voting
securities, by contract or otherwise.

     “Corporation” is defined in the Preamble of this Agreement.

     “Corporation Return” means the federal and/or state and/or local and/or foreign Tax
Return, as applicable, of the Corporation (or, as applicable, of the consolidated, combined or
unitary group in which the Corporation is included) filed with respect to Taxes of any Taxable
Year.

     “Cumulative Net Realized Tax Benefit” for a Taxable Year means the cumulative amount
(but not less than zero) of Realized Tax Benefits for all Taxable Years of the Corporation, up to
and including such Taxable Year, net of the cumulative amount of Realized Tax Detriments for the
same period. The Realized Tax Benefit and Realized Tax Detriment for each Taxable Year shall be
determined based on the most recent Tax Benefit Schedule or Amended Schedule, if any, in existence
at the time of such determination.

     “Default Rate” means LIBOR plus 500 basis points.

     “Determination” has the meaning ascribed to such term in Section 1313(a) of the Code
or similar provision of state, local or foreign tax law, as applicable, or any other event
(including the execution of IRS Form 870-AD) that finally and conclusively establishes the amount
of any liability for Tax.

     “Dispute” is defined in Section 7.8(a) of this Agreement.

     “Early Termination Date” means the date of an Early Termination Notice for purposes of
determining the Early Termination Payment.

     “Early Termination Effective Date” is defined in Section 4.2 of this Agreement.

     “Early Termination Notice” is defined in Section 4.2 of this Agreement.

     “Early Termination Payment” is defined in Section 4.3(b) of this Agreement.

     “Early Termination Rate” means the lesser of (i) 6.5% per annum, compounded annually,
and (ii) LIBOR plus 100 basis points.

     “Early Termination Schedule” is defined in Section 4.2 of this Agreement.

     “Expert” is defined in Section 7.9(a) of this Agreement.

     “Hypothetical Tax Liability” means, with respect to any Taxable Year, the liability
for Taxes of the Corporation or the other members of the consolidated, combined, or unitary group
of which the Corporation is a member, in each case using the same methods, elections, conventions
and similar practices used on the relevant Corporation Return, but (i) excluding any deduction
attributable to Basis Recovery as reflected on the Closing Date Basis Recovery Letter, including
amendments, (ii) after applying clause (i), using the Non-Stepped Up Tax Basis for Boot Basis
Adjustments consistent (other than in the first year of this Agreement) with the prior year’s Tax
Benefit Schedule, including

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amendments, and (iii) excluding any deduction attributable to Imputed Interest for the Taxable
Year. For the avoidance of doubt, Hypothetical Tax Liability shall be determined without taking
into account the carryover or carryback of any Tax item (or portions thereof) that is attributable
to Basis Recovery, Boot Basis Adjustments or Imputed Interest.

     “Imputed Interest” has the meaning set forth in the Recitals to this Agreement.

     “Independent Director” means any member of the Board who is not affiliated with any of
the principal stockholders of the Corporation and who is neither a current officer nor a former
officer of the Corporation or any of its Subsidiaries.

     “Interest Amount” has the meaning set forth in Section 3.1(b) of this Agreement.

     “IRS” means the United States Internal Revenue Service.

     “KB Shareholders” is defined in the Preamble of this Agreement.

     “KRG Blocker” means KRG Aurora Blocker, Inc., a Delaware corporation.

     “KRG Representative” is defined in Section 7.13 of this Agreement.

     “LIBOR” means during any period, an interest rate per annum equal to the one-year
LIBOR reported, on the date two days prior to the first day of such period, on the Telerate Page
3750 (or if such screen shall cease to be publicly available, as reported on Reuters Screen page
“LIBOR01” or by any other publicly available source of such market rate) for London interbank
offered rates for United States dollar deposits for such period.

     “Management Investors” is defined in the Preamble of this Agreement.

     “Management Representative” is defined in Section 7.13 of this Agreement.

     “Material Objection Notice” is defined in Section 4.2 of this Agreement.

     “Members” has the meaning set forth in the Recitals to this Agreement and shall
include any assignee of all or part of any Member’s interest hereunder to the extent written notice
of such assignment has been provided to the Corporation.

     “Merger” has the meaning set forth in the Recitals to this Agreement.

     “Net Tax Benefit” has the meaning set forth in Section 3.1(b) of this Agreement.

     “Non-Stepped Up Tax Basis” means the Tax basis that the assets held directly or
indirectly by the Corporation (or any other member of the consolidated, combined or unitary group
of which the Corporation is a member) would have had if no Boot Basis Adjustments had been made.

     “Objection Notice” is defined in Section 2.3(a) of this Agreement.

     “Paid in Full” means, with respect to the payment of any Senior Obligations, the
payment in full, in cash, of all amounts outstanding (and, for the avoidance of doubt, excluding
any contingent obligations) under the Senior Obligations, whether due and payable at such time, and
the complete termination of any revolving commitments, letter of credit commitments and other
commitments to make extensions of credit pursuant to, or in respect of, any Senior Obligations.

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     “Payment Date” means any date on which a payment is required to be made pursuant to
this Agreement.

     “Percentage” means, with respect to each Member, the percentage set forth opposite
such Member’s name on the Member Percentage Schedule hereto.

     “Person” means any individual, corporation, firm, partnership, joint venture, limited
liability company, estate, trust, business association, organization, governmental entity or other
entity.

     “Qualified Tax Advisor” means Alston & Bird LLP, Kirkland & Ellis LLP, McGladrey &
Pullen, LLP or any other law or accounting firm that is nationally recognized as being expert in
Tax matters and that is reasonably acceptable to the Corporation.

     “Realized Tax Benefit” means, for a Taxable Year, the excess, if any, of the
Hypothetical Tax Liability over the actual liability for Taxes imposed on the Corporation or the
other members of the consolidated, combined or unitary group of which the Corporation is a member
for such Taxable Year. If all or a portion of the actual liability for such Taxes for the Taxable
Year arises as a result of an audit by a Taxing Authority of any Taxable Year, such liability shall
not be included in determining the Realized Tax Benefit unless and until there has been a
Determination.

     “Realized Tax Detriment” means, for a Taxable Year, the excess, if any, of the actual
liability for Taxes imposed on the Corporation or the other members of the consolidated, combined
or unitary group of which the Corporation is a member for such Taxable Year, over the Hypothetical
Tax Liability for such Taxable Year. If all or a portion of the actual liability for such Taxes for
the Taxable Year arises as a result of an audit by a Taxing Authority of any Taxable Year, such
liability shall not be included in determining the Realized Tax Detriment unless and until there
has been a Determination.

     “Reconciliation Dispute” is defined in Section 7.9(a) of this Agreement.

     “Reconciliation Procedures” is defined in Section 2.3(a) of this Agreement.

     “Regular Payment” has the meaning set forth in Section 3.1(b) of this Agreement.

     “Representative” means a current member of the Committee.

     “SB Shareholders” is defined in the Preamble of this Agreement.

     “Schedule” means any of the following: (i) the Closing Date Basis Recovery Letter,
(ii) a Tax Benefit Schedule, or (iii) the Early Termination Schedule.

     “Senior Obligations” is defined in Section 5.1 of this Agreement.

     “Subsidiaries” means, with respect to any Person, as of any date of determination, any
other Person as to which such Person, owns, directly or indirectly, or otherwise controls more than
50% of the voting power or other similar interests or the sole general partner interest or managing
member or similar interest of such Person.

     “Subsidiary Stock” means any stock or other equity interest in any subsidiary entity
of the Corporation that is treated as a corporation for United States federal income tax purposes.

     “Summit Blockers” means SV VI-B Aurora Blocker Corp. and SPPE VII-B Aurora Blocker
Corp., each a Delaware corporation.

     “Summit Funds” is defined in the Preamble of this Agreement.

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     “Summit GPs” is defined in the Preamble of this Agreement.

     “Summit Representative” is defined in Section 7.13 of this Agreement.

     “Tax Benefit Payment” is defined in Section 3.1(b) of this Agreement.

     “Tax Benefit Schedule” is defined in Section 2.2(a) of this Agreement.

     “Tax Return” means any return, declaration, report or similar statement filed or
required to be filed with respect to Taxes (including any attached schedules), including, without
limitation, any information return, claim for refund, amended return and declaration of estimated
Tax.

     “Taxable Year” means a taxable year of the Corporation as defined in Section 441(b) of
the Code or comparable section of state, local or foreign tax law, as applicable (and, therefore,
for the avoidance of doubt, may include a period of less than 12 months for which a Tax Return is
made), ending on or after the Closing Date.

     “Taxes” means any and all United States federal, state, local and foreign taxes,
assessments or similar charges that are based on or measured with respect to net income or profits,
and any interest or penalties related to such Taxes.

     “Taxing Authority” means any domestic, federal, national, state, county or municipal
or other local government, any subdivision, agency, commission or authority thereof, or any
quasi-governmental body exercising any taxing authority or any other authority exercising Tax
regulatory authority.

     “TRA Rights” has the meaning set forth in the Recitals to this Agreement.

     “Treasury Regulations” means the final, temporary and proposed regulations under the
Code promulgated from time to time (including corresponding provisions and succeeding provisions)
as in effect for the relevant taxable period.

     “Units” has the meaning set forth in the Recitals to this Agreement.

     “Valuation Assumptions” means, as of an Early Termination Date, the assumptions that
(1) in each Taxable Year ending on or after such Early Termination Date, the Corporation will have
taxable income sufficient to fully utilize the deductions arising from Basis Recovery, Boot Basis
Adjustments and the Imputed Interest during such Taxable Year or future Taxable Years (including,
for the avoidance of doubt, Boot Basis Adjustments and Imputed Interest that would result from
future Tax Benefit Payments that would be paid in accordance with the Valuation Assumptions) in
which such deductions would become available, (2) the United States federal income tax rates and
state, local and foreign income tax rates that will be in effect for each such Taxable Year will be
those specified for each such Taxable Year by the Code and other law as in effect on the Early
Termination Date, (3) any loss carryovers generated by Basis Recovery, any Boot Basis Adjustment or
Imputed Interest and available as of the date of the Early Termination Schedule will be utilized by
the Corporation in the earliest possible Taxable Year permitted by the Code and Treasury
Regulations from the date of the Early Termination Schedule, including the Taxable Year that
includes the date of the Early Termination Schedule, (4) any non-amortizable assets (other than any
Subsidiary Stock) will be disposed of on the fifteenth anniversary of the applicable Boot Basis
Adjustment; provided, that in the event of a Change of Control, such non-amortizable assets
shall be deemed disposed of at the time of sale of the relevant asset (if earlier than such
fifteenth anniversary), and (5) any Subsidiary Stock will be deemed never to be disposed of;
provided, that if (i) the Committee delivers to the Corporation a written opinion of a
Qualified Tax Advisor to the effect that as a result of a certain transaction (or series of
transactions), it is more likely than not that the tax basis in the amortizable or depreciable
assets of Aurora that are acquired by the Corporation in the

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Merger will be increased by reference to the tax basis in such Subsidiary Stock and the tax
basis in such Subsidiary Stock will decrease accordingly, and (ii) the Corporation determines that
it is commercially reasonable to effectuate such transaction (or series of transactions), then the
Valuation Assumptions will take into account such increased tax basis in the amortizable or
depreciable assets of Aurora that are acquired by the Corporation in the Merger.

ARTICLE II

DETERMINATION OF CERTAIN REALIZED TAX BENEFITS

     Section 2.1 Closing Date Basis Recovery Letter. The letter dated as of the date of
this Agreement from the Corporation to the Members shows, in reasonable detail necessary to perform
the calculations required by this Agreement, for purposes of Taxes, estimates of (i) the Closing
Date Tax Basis, (ii) Basis Recovery, calculated in the aggregate, and (iii) the Basis Recovery
schedule, which is the period (or periods) over which the Closing Date Tax Basis is amortized,
depreciated, or otherwise recovered (the “Closing Date Basis Recovery Letter”).

     Section 2.2 Tax Benefit Schedule.

     (a) Tax Benefit Schedule. Within 90 calendar days after the filing of the United
States federal income tax return of the Corporation for any Taxable Year in which there is a
Realized Tax Benefit or Realized Tax Detriment, the Corporation shall provide to the Committee a
schedule showing, in reasonable detail, the calculation of the Realized Tax Benefit or Realized Tax
Detriment for such Taxable Year (a “Tax Benefit Schedule”), which Tax Benefit Schedule also will
include (i) the Non-Stepped-Up Tax Basis of the Corporation’s direct and indirect assets, (ii) the
Boot Basis Adjustments for such Taxable Year, calculated in the aggregate, and (iii) the period
over which the Boot Basis Adjustments will be amortizable and/or depreciable. The Tax Benefit
Schedule will become final as provided in Section 2.3(a) and may be amended as provided in Section
2.3(b) (subject to the procedures set forth in Section 2.3(b)).

     (b) Applicable Principles. The Realized Tax Benefit or Realized Tax Detriment for each
Taxable Year is intended to measure the decrease or increase in the actual liability for Taxes of
the Corporation for such Taxable Year attributable to Basis Recovery, Boot Basis Adjustments and
Imputed Interest, determined using a “with and without” methodology. For the avoidance of doubt,
the actual liability for Taxes will take into account the deduction of the portion of the Tax
Benefit Payment that must be accounted for as interest under the Code based upon the
characterization of Tax Benefit Payments as additional taxable boot payable by the Corporation.
Carryovers or carrybacks of any Tax item attributable to Basis Recovery, Boot Basis Adjustments and
Imputed Interest shall be considered to be subject to the rules of the Code and the Treasury
Regulations or the appropriate provisions of U.S. state and local income and franchise tax law, as
applicable, governing the use, limitation and expiration of carryovers or carrybacks of the
relevant type. The parties agree that (i) all Tax Benefit Payments attributable to Basis Recovery
or to Boot Basis Adjustments, other than amounts accounted for as Imputed Interest, will (A) be
treated as subsequent upward purchase price adjustments that give rise to further Boot Basis
Adjustments to the Corporation and (B) have the effect of creating additional Boot Basis
Adjustments to the Corporation in the year of payment, and (ii) as a result, such additional Boot
Basis Adjustments will be incorporated into the current year calculation and into future year
calculations, as appropriate.

     Section 2.3 Procedures, Amendments.

     (a) Procedure. Every time the Corporation delivers to the Committee an applicable
Schedule under this Agreement, including any Amended Schedule delivered pursuant to Section 2.3(b),
but

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excluding any Early Termination Schedule or amended Early Termination Schedule, the
Corporation shall also (x) deliver to the Committee schedules and work papers, as determined by the
Corporation or requested by the Committee, providing reasonable detail regarding the preparation of
the Schedule and (y) allow the Committee reasonable access at no cost to the appropriate
representatives at the Corporation, as determined by the Corporation or requested by the Committee,
in connection with a review of such Schedule. Without limiting the application of the preceding
sentence, each time the Corporation delivers to the Committee a Tax Benefit Schedule, in addition
to the Tax Benefit Schedule duly completed, the Corporation shall deliver to the Committee the
Corporation Return, the reasonably detailed calculation by the Corporation of the Hypothetical Tax
Liability, the reasonably detailed calculation by the Corporation of the actual Tax liability, as
well as any other work papers as determined by the Corporation or requested by the Committee. An
applicable Schedule or amendment thereto shall become final and binding on all parties 30 calendar
days from the first date on which the Committee has received the applicable Schedule or amendment
thereto (as well as the tax returns, calculations and work papers described in (i) and (ii) of the
preceding sentence) unless the Committee (i) within 30 calendar days after receiving an applicable
Schedule or amendment thereto (as well as the tax returns, calculations and work papers described
in (i) and (ii) of the preceding sentence), provides the Corporation with notice of a material
objection to such Schedule (“Objection Notice”) made in good faith, in which case such Schedule or
amendment thereto becomes final and binding upon agreement of the parties or conclusion of the
Reconciliation Procedures (as defined below), or (ii) provides a written waiver of such right of
any Objection Notice within the period described in clause (i) above, in which case such Schedule
or amendment thereto becomes final and binding on the date the waiver is received by the
Corporation. If the parties, for any reason, are unable to successfully resolve the issues raised
in any Objection Notice within 30 calendar days after receipt by the Corporation of an Objection
Notice, the Corporation and the Members shall employ the reconciliation procedures as described in
Section 7.9 of this Agreement (the “Reconciliation Procedures”).

     (b) Amended Schedule. The applicable Schedule for any Taxable Year may be amended from
time to time by the Corporation (i) in connection with a Determination affecting such Schedule,
(ii) to correct inaccuracies in the Schedule identified as a result of the receipt of additional
factual information relating to a Taxable Year after the date the Schedule was provided to the
Committee, (iii) to comply with the Expert’s determination under the Reconciliation Procedures,
(iv) to reflect a change in the Realized Tax Benefit or Realized Tax Detriment for such Taxable
Year attributable to a carryback or carryforward of a loss or other tax item to such Taxable Year,
(v) to reflect a change in the Realized Tax Benefit or Realized Tax Detriment for such Taxable Year
attributable to an amended Tax Return filed for such Taxable Year, or (vi) to adjust the Closing
Date Basis Recovery Letter to take into account payments made pursuant to this Agreement (any such
Schedule, an “Amended Schedule”). In addition, the Closing Date Basis Recovery Letter shall be
appropriately amended by the Committee and the Corporation to the extent that, as a result of a
Determination, the Corporation is required to calculate its Tax liability in a manner inconsistent
with the Closing Date Basis Recovery Letter.

ARTICLE III

TAX BENEFIT PAYMENTS

     Section 3.1 Payments.

     (a) Payments. Notwithstanding Section 3.1(b), but subject to the one million dollar
($1,000,000) limitation on aggregate Catch-Up Payments set forth in Section 3.1(b), no later than
April 1 of the calendar year following the calendar year in which the Merger occurs, the
Corporation shall make payments (“Catch-Up Payments”) to the Members in the amount of 20% of the
ordinary income recognized by Aurora in connection with the Merger and allocated to such Member (as
reported to such Member on the Schedule K-1 of Aurora’s Form 1065 for the year during which the
Merger occurs),

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without regard to either the amount of any Net Tax Benefit or the amount of any Tax Benefit
Payment otherwise due by such date. Within five (5) Business Days after a Tax Benefit Schedule
delivered to the Committee becomes final and binding in accordance with Section 2.3(a), the
Corporation shall pay to each Member for such Taxable Year such Member’s Tax Benefit Payment
determined pursuant to Section 3.1(b). Each such Tax Benefit Payment shall be made by wire transfer
of immediately available funds to the bank accounts previously designated by such Member to the
Corporation or, if no wire transfer instructions have been so provided, by check payable to such
Member or as otherwise agreed by the Corporation and such Member. For the avoidance of doubt, no
Tax Benefit Payment shall be made in respect of estimated tax payments, including, without
limitation, federal estimated income tax payments.

     (b) Tax Benefit Payment. A “Tax Benefit Payment” means an amount, not less than zero,
equal to the sum of the Net Tax Benefit and the Interest Amount. Tax Benefit Payments shall be made
to the Members in the following order and priority: first, a Catch-Up Payment shall be made to each
Member, until each Member has received an aggregate Catch-Up Payment (including in such aggregate
Catch-Up Payments made pursuant to the first sentence of Section 3.1(a) as well as Catch-Up
Payments described in this Section 3.1(b)) equal to 20% of the amount of such ordinary income
allocated to the Member on the Schedule K-1 of Aurora’s Form 1065 for the year during which the
Merger occurs (provided, however, that aggregate Catch-Up Payments made to all
Members pursuant to the terms of this Agreement shall not exceed one million dollars ($1,000,000));
and second, a payment (a “Regular Payment”) shall be made to each Member equal to any remaining Tax
Benefit Payment multiplied by such Member’s Percentage as set forth on the Member Percentage
Schedule attached hereto (and as updated from time to time by written notice to the Corporation by
any Member assigning in whole or in part its interests hereunder), with it being understood and
agreed that each Catch-Up Payment and each Regular Payment will include a ratable portion of each
of the Net Tax Benefit and the Interest Amount. For the avoidance of doubt, for Tax purposes, the
Interest Amount shall not be treated as interest but instead shall be treated as additional
consideration for the acquisition of Units in the Merger unless otherwise required by law. The
“Net Tax Benefit” for a Taxable Year shall be an amount equal to the excess, if any, of (i) 85% of
the Cumulative Net Realized Tax Benefit as of the end of such Taxable Year over (ii) the total
amount of Catch-Up Payments and Regular Payments previously made under this Section 3.1 (excluding
the portion of any such payments attributable to Interest Amounts); provided, for the
avoidance of doubt, that no Member shall be required to return any portion of any previously made
Tax Benefit Payment. The “Interest Amount” shall equal the interest on the Net Tax Benefit
calculated at the Agreed Rate from the due date (without extensions) for filing the Corporation
Return with respect to Taxes for such Taxable Year until the Payment Date. Notwithstanding the
foregoing, for each Taxable Year ending on or after the date of a Change of Control, all Tax
Benefit Payments shall be calculated by utilizing Valuation Assumptions (1), (3), (4) and (5),
substituting in each case the terms “the closing date of a Change of Control” for an “Early
Termination Date.”

     Section 3.2 No Duplicative Payments. It is intended that the provisions of this
Agreement will not result in duplicative payment of any amount (including interest) required under
this Agreement. The provisions of this Agreement shall be construed in the appropriate manner to
ensure such intentions are realized.

     Section 3.3 Imputed Interest. For the avoidance of doubt, for purposes of determining
the amount of Imputed Interest under this Agreement, the interest rate to be used shall be the rate
as determined under the applicable provision of the Code, and not the Agreed Rate.

ARTICLE IV

TERMINATION

     Section 4.1 Early Termination and Breach of Agreement.

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     (a) With the written approval of a majority of the Independent Directors, the Corporation may
terminate this Agreement with respect to all amounts payable to the Members at any time by paying
to each Member such Member’s Early Termination Payment; provided, however, that this
Agreement shall only terminate as to a Member upon the receipt of the Early Termination Payment by
such Member; and provided, further, that the Corporation may withdraw any notice to
execute its termination rights under this Section 4.1(a) prior to the time at which any Early
Termination Payment has been paid to any Member. Upon payment of all of the Early Termination
Payments by the Corporation, neither the Members nor the Corporation shall have any further payment
obligations under this Agreement, other than for any (a) Tax Benefit Payment agreed to by the
Corporation and the Committee as due and payable but unpaid as of the Early Termination Notice and
(b) Tax Benefit Payment due for the Taxable Year ending with or including the date of the Early
Termination Notice (except to the extent that the amount described in clause (b) is included in the
Early Termination Payment).

     (b) In the event that the Corporation breaches any of its material obligations under this
Agreement, whether as a result of failure to make any payment when due, failure to honor any other
material obligation required hereunder, or by operation of law as a result of the rejection of this
Agreement in a case commenced under the Bankruptcy Code or otherwise, then all obligations
hereunder shall be accelerated and such obligations shall be calculated as if an Early Termination
Notice had been delivered on the date of such breach and shall include, but not be limited to, (1)
the Early Termination Payment calculated as if an Early Termination Notice had been delivered on
the date of a breach, (2) any Tax Benefit Payment agreed to by the Corporation and the Committee as
due and payable but unpaid as of the date of a breach, and (3) any Tax Benefit Payment due for the
Taxable Year ending with or including the date of a breach. Notwithstanding the foregoing, in the
event that the Corporation breaches any of its material obligations under this Agreement, each
Member shall be entitled to elect to receive the amounts set forth in clauses (1), (2) and (3)
above or to seek specific performance of the terms hereof. The parties agree that the failure to
make any payment due pursuant to this Agreement within three months after the date such payment is
due shall be deemed to be a breach of a material obligation under this Agreement for all purposes
of this Agreement, and that it will not be considered to be a breach of a material obligation under
this Agreement to make a payment due pursuant to this Agreement within three months after the date
such payment is due. Notwithstanding anything in this Agreement to the contrary, it shall not be a
breach of this Agreement (but, for the avoidance of doubt, Section 5.2 shall apply as if such Tax
Benefit Payment was due) if the Corporation fails to make any Tax Benefit Payment when due (i) to
the extent that the Corporation has insufficient funds to make such payment as a result of
applicable limitations imposed by any agreement governing existing Senior Obligations (including,
without limitation, limitations on the ability of direct or indirect subsidiaries of the
Corporation to make distributions to the Corporation) or (ii) if the Board determines reasonably
and in good faith that making any such distribution or payment would result in a default under any
such agreement governing existing Senior Obligations, and the failure to make any such payment as a
result of the circumstances in clause (i) or (ii) shall not result in another breach of this
Agreement or alter the provisions of Article V and such prohibited payment shall not be paid so
long as it is restricted pursuant to clause (i) or (ii). The Corporation shall use commercially
reasonable efforts to maintain sufficient available funds for the purpose of making required
payments under this Agreement. Any interest payable on an Early Termination Payment shall only be
required to be paid upon the payment of the applicable Early Termination Payment, except to the
extent such interest is not otherwise prohibited by the applicable limitations imposed by any
agreement governing existing Senior Obligations.

     Section 4.2 Early Termination Notice. If the Corporation chooses to exercise its right
of early termination under Section 4.1 above, the Corporation shall deliver to the Committee notice
of such intention to exercise such right (“Early Termination Notice”) and a schedule (the “Early
Termination Schedule”) specifying the Corporation’s intention to exercise such right and showing in
reasonable detail the calculation of the Early Termination Payment for each of the Members. The
Early Termination

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Schedule shall become final and binding on all parties 30 calendar days from the first date on
which the Committee has received such Schedule or amendment thereto unless the Committee (i) within
30 calendar days after receiving the Early Termination Schedule, provides the Corporation with
notice of a material objection to such Schedule made in good faith (“Material Objection Notice”) or
(ii) provides a written waiver of such right of a Material Objection Notice within the period
described in clause (i) above, in which case such Schedule becomes binding on the date the waiver
is received by the Corporation (the “Early Termination Effective Date”). If the parties, for any
reason, are unable to successfully resolve the issues raised in such notice within 30 calendar days
after receipt by the Corporation of the Material Objection Notice, the Corporation and the Members
shall employ the Reconciliation Procedures.

     Section 4.3 Payment upon Early Termination.

     (a) Within three calendar days after the Early Termination Effective Date, the Corporation
shall pay to each Member an amount equal to such Member’s Early Termination Payment. Such payment
shall be made by wire transfer of immediately available funds to a bank accounts designated by such
Member or, if no wire transfer instructions have been so provided, by check payable to such Member
or as otherwise agreed by the Corporation and such Member.

     (b) Each Member’s “Early Termination Payment” shall equal the present value, discounted at the
Early Termination Rate as of the Early Termination Effective Date, of all Tax Benefit Payments that
would be required to be paid by the Corporation to such Member beginning from the Early Termination
Date and assuming that the Valuation Assumptions are applied.

ARTICLE V

SUBORDINATION AND LATE PAYMENTS

     Section 5.1 Subordination. Notwithstanding any other provision of this Agreement to
the contrary, any Tax Benefit Payment or Early Termination Payment required to be made by the
Corporation to the Members under this Agreement shall rank subordinate and junior in right of
payment to any principal, interest or other amounts due and payable in respect of any obligations
in respect of indebtedness for borrowed money of the Corporation and its Subsidiaries (“Senior
Obligations”) and shall rank pari passu with all current or future unsecured obligations that are
not Senior Obligations.

     In the event of any dissolution, winding up, liquidation, arrangement, reorganization,
adjustment, protection, relief or composition of the Corporation or its debts, whether voluntary or
involuntary, in any bankruptcy, insolvency, arrangement, reorganization, receivership, relief or
other similar case or proceeding under any Federal or State bankruptcy or similar law or upon an
assignment for the benefit of creditors or any other marshalling of the assets and liabilities of
the Corporation or otherwise, the Senior Obligations shall first be Paid in Full before the Members
shall be entitled to receive any Tax Benefit Payment or Early Termination Payment (or any interest
thereon), and any payment or distribution of any kind (whether in cash, property or securities)
that otherwise would be payable or deliverable upon or with respect to the Tax Benefit Payment or
Early Termination Payment in any such case, proceeding, assignment, marshalling or otherwise shall
be paid or delivered directly to the holders of the Senior Obligations until Paid in Full. If any
event of default has occurred and is continuing under the Senior Obligations, no Tax Benefit
Payment or Early Termination Payment (or any interest due thereon) shall be made by or on behalf of
the Corporation, and the Members shall not take or receive from the Corporation, directly or
indirectly, in cash or other property or by set off or in any other manner, including, without
limitation, from or by way of collateral, payment of all or any outstanding portion of the Tax
Benefit Payment or Early Termination Payment (or interest due thereon). All payments or
distributions received by the Members which are paid or received contrary to the provisions of this
Section 5.1 shall be received in trust for the benefit of the lenders and agents under the Senior
Obligations, shall be segregated from other funds and property held by the Members, and shall be
forthwith paid over to the Barclays Bank PLC

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(or its designated successor), as administrative agent on behalf of the lenders and other
agents under the Senior Obligations, to be applied to the payment or prepayment of the Senior
Obligations in accordance with the terms of the agreements governing the Senior Obligations.

     Section 5.2 Late Payments by the Corporation. The amount of all or any portion of any
Tax Benefit Payment or Early Termination Payment not made to the Members when due under the terms
of this Agreement shall be payable together with any interest thereon, computed at the Default Rate
and commencing from the date on which such Tax Benefit Payment or Early Termination Payment was due
and payable.

ARTICLE VI

NO DISPUTES; CONSISTENCY; COOPERATION

     Section 6.1 Participation in the Other Parties’ Tax Matters. Except as otherwise
provided herein or in any other Agreement between the Corporation and any of the Members, the
Corporation shall have full responsibility for, and sole discretion over, all Tax matters
concerning the Corporation, including without limitation the preparation, filing, or amending of
any Tax Return and defending, contesting or settling any issue pertaining to Taxes. Notwithstanding
the foregoing, the Corporation shall notify the Committee of, and keep the Committee reasonably
informed with respect to, the portion of any audit of the Corporation by a Taxing Authority the
outcome of which is reasonably expected to affect the rights and obligations of the Members under
this Agreement, and shall provide to the Committee reasonable opportunity to provide information
and other input to the Corporation and its respective advisors concerning the conduct of any such
portion of such audit.

     Section 6.2 Consistency. The Corporation and the Members agree to report and cause to
be reported for all purposes, including federal, state, local and foreign Tax purposes and
financial reporting purposes, all Tax-related items (including, without limitation, Basis Recovery,
Boot Basis Adjustments, Imputed Interest and each Tax Benefit Payment) in a manner consistent with
that specified by the Corporation in any Schedule required to be provided by or on behalf of the
Corporation under this Agreement unless otherwise required by law.

     Section 6.3 Cooperation. The Members shall (a) furnish to the Corporation in a timely
manner such information, documents, and other materials as the Corporation may reasonably request
for purposes of making any determination or computation necessary or appropriate under this
Agreement, preparing any Tax Return or contesting or defending any audit, examination, or
controversy with any Taxing Authority, including without limitation any determination or
calculation of the Boot Basis Adjustment, (b) make itself available to the Corporation to provide
explanations of documents and materials and such other information as the Corporation may
reasonably request in connection with any of the matters described in clause (a) above, and (c)
reasonably cooperate in connection with any such matter, and the Corporation shall reimburse the
Committee for any reasonable third-party costs and expenses incurred pursuant to this Section 6.3.

ARTICLE VII

MISCELLANEOUS

     Section 7.1 Notices. All notices, requests, claims, demands, and other communications
hereunder shall be in writing and shall be deemed duly given and received (a) on the date of
delivery if delivered personally or (b) on the first Business Day following the date of dispatch if
delivered by a recognized next-day courier service. All notices hereunder shall be delivered as set
forth below, or pursuant to such other instructions as may be designated in writing by the party to
receive such notice:

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If to the Corporation, the Management Investors, or the Management Representative,
to:

Aurora Diagnostics, Inc.

11025 RCA Center Drive, Suite 300

Palm Beach Gardens, Florida 33410

Attn: James C. New

with a copy (which shall not constitute notice to the Corporation, the Management
Investors, or the Management Representative) to:

Alston & Bird LLP

101 South Tryon Street, Suite 4000

Charlotte, North Carolina 28280

Attn: Lee R. Rimler, Esq.

If to the Summit Funds, the Summit GPs, the SB Shareholders, or the Summit
Representative, to:

c/o Summit Partners, L.P.

222 Berkeley Street, 18th Floor

Boston, Massachusetts 02116

Attn: Christopher J. Dean

Attn: Pete Connolly (for notice to the Summit Representative only)

with copies (which shall not constitute notice to the Summit Funds, the Summits GPs,
the SB Shareholders, or the Summit Representative) to:

Kirkland & Ellis LLP

300 North LaSalle Street

Chicago, Illinois 60654

Attn: Brian C. Van Klompenberg, P.C.

If to the KB Shareholders or the KRG Representative, to:

KRG Capital Partners, LLC

1515 Arapahoe Street, Tower One, Suite 1500

Denver, Colorado 80202

Attn: Christopher J. Bock

with copies (which shall not constitute notice to the KB Shareholders or the KRG
Representative) to:

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Hogan Lovells LLP

One Tabor Center, Suite 1500

1200 Seventeenth Street

Denver, Colorado 80202

Attn: George A. Hagerty, Esq.

If to the Committee, to the KRG Representative, Summit Representative, and
Management Representative as listed above in this Section 7.1.

Any party may change its address by giving the other party written notice of its new address in the
manner set forth above.

     Section 7.2 Counterparts. This Agreement may be executed in one or more counterparts,
all of which shall be considered one and the same agreement and shall become effective when one or
more counterparts have been signed by each of the parties and delivered to the other parties, it
being understood that all parties need not sign the same counterpart. Delivery of an executed
signature page to this Agreement by facsimile transmission or electronic transmission in portable
document format (pdf) shall be as effective as delivery of a manually signed counterpart of this
Agreement.

     Section 7.3 Entire Agreement; No Third Party Beneficiaries. This Agreement constitutes
the entire agreement and supersedes all prior agreements and understandings, both written and oral,
among the parties with respect to the subject matter hereof. This Agreement shall be binding upon
and inure solely to the benefit of each party hereto and their respective successors and permitted
assigns, and nothing in this Agreement, express or implied, is intended to or shall confer upon any
other Person any right, benefit or remedy of any nature whatsoever under or by reason of this
Agreement.

     Section 7.4 Governing Law. This Agreement shall be governed by, and construed in
accordance with, the laws of the State of New York, without regard to the conflicts of laws
principles thereof that would mandate the application of the laws of another jurisdiction.

     Section 7.5 Severability. If any term or other provision of this Agreement is invalid,
illegal, or incapable of being enforced by any law or public policy, all other terms and provisions
of this Agreement shall nevertheless remain in full force and effect so long as the economic or
legal substance of the transactions contemplated hereby is not affected in any manner materially
adverse to any party. Upon such determination that any term or other provision is invalid, illegal,
or incapable of being enforced, the parties hereto shall negotiate in good faith to modify this
Agreement so as to effect the original intent of the parties as closely as possible in an
acceptable manner in order that the transactions contemplated hereby are consummated as originally
contemplated to the greatest extent possible.

     Section 7.6 Successors; Assignment; Amendments; Waivers.

     (a) Each of the Members may assign any of its rights under this Agreement, in whole or in
part, to any Person as long as such transferee has executed and delivered, or, in connection with
such transfer, executes and delivers, a joinder to this Agreement, in form and substance reasonably
satisfactory to the Corporation, agreeing to assume all rights and obligations of such Member under
this Agreement appurtenant to the rights being assigned, except as otherwise provided in such
joinder.

     (b) No provision of this Agreement may be amended unless such amendment is approved in writing
by the Corporation and the Committee; provided, that, the definition of Change of Control
cannot be amended without the written approval of a majority of the Independent Directors. No
provision of this

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Agreement may be waived unless such waiver is in writing and signed by the party against whom
the waiver is to be effective.

     (c) All of the terms and provisions of this Agreement shall be binding upon, shall inure to
the benefit of, and shall be enforceable by the parties hereto and their respective successors,
assigns, heirs, executors, administrators, and legal representatives. The Corporation shall require
and cause any direct or indirect successor (whether by purchase, merger, consolidation, or
otherwise) to all or substantially all of the business or assets of the Corporation by written
agreement, expressly to assume and agree to perform this Agreement in the same manner and to the
same extent that the Corporation would be required to perform if no such succession had taken
place.

     Section 7.7 Titles and Subtitles. The titles of the sections and subsections of this
Agreement are for convenience of reference only and are not to be considered in construing this
Agreement.

     Section 7.8 Resolution of Disputes.

     (a) Any and all disputes which cannot be settled amicably, including any ancillary claims of
any party, arising out of, relating to or in connection with the validity, negotiation, execution,
interpretation, performance, or non-performance of this Agreement (including the validity, scope
and enforceability of this arbitration provision) (each a “Dispute”) shall be finally settled by
arbitration conducted by a single arbitrator in New York, New York in accordance with the
then-existing Rules of Arbitration of the International Chamber of Commerce. If the parties to the
Dispute fail to agree on the selection of an arbitrator within ten (10) days of the receipt of the
request for arbitration, the International Chamber of Commerce shall make the appointment. The
arbitrator shall be a lawyer admitted to the practice of law in the State of New York and shall
conduct the proceedings in the English language. Performance under this Agreement shall continue if
reasonably possible during any arbitration proceedings.

     (b) Notwithstanding the provisions of paragraph (a), the Corporation may bring an action or
special proceeding in any court of competent jurisdiction for the purpose of compelling a party to
arbitrate, seeking temporary or preliminary relief in aid of an arbitration hereunder, and/or
enforcing an arbitration award. For the purposes of this paragraph (b), each of the Members (i)
expressly consents to the application of paragraph (c) of this Section 7.8 to any such action or
proceeding, (ii) agrees that proof shall not be required that monetary damages for breach of the
provisions of this Agreement would be difficult to calculate and that remedies at law would be
inadequate, and (iii) irrevocably appoints the Corporation as agent of such Member for service of
process in connection with any such action or proceeding and agrees that service of process upon
such agent, who shall promptly advise the Committee or, if such action relates solely to one or
more Members and not the Members as a whole, such Members of any such service of process, shall be
deemed in every respect effective service of process upon such Members in any such action or
proceeding.

     (c) (i) EACH PARTY HEREBY IRREVOCABLY SUBMITS TO THE JURISDICTION OF COURTS LOCATED IN NEW
YORK, NEW YORK FOR THE PURPOSE OF ANY JUDICIAL PROCEEDING BROUGHT IN ACCORDANCE WITH THE PROVISIONS
OF THIS SECTION 7.8, OR ANY JUDICIAL PROCEEDING ANCILLARY TO AN ARBITRATION OR CONTEMPLATED
ARBITRATION ARISING OUT OF OR RELATING TO OR CONCERNING THIS AGREEMENT. Such ancillary judicial
proceedings include any suit, action, or proceeding to compel arbitration, to obtain temporary or
preliminary judicial relief in aid of arbitration, or to confirm an arbitration award. The parties
acknowledge that the forums designated by this paragraph (c) have a reasonable relation to this
Agreement, and to the parties’ relationship with one another; and

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          (ii) The parties hereby waive, to the fullest extent permitted by applicable law, any
objection which they now or hereafter may have to personal jurisdiction or to the laying of venue
of any such ancillary suit, action or proceeding brought in any court referred to in the preceding
paragraph of this Section 7.8 and such parties agree not to plead or claim the same.

     Section 7.9 Reconciliation. In the event that the Corporation, on the one hand, and
one or more of the Members, on the other hand, are unable to resolve a disagreement with respect to
the matters governed by Sections 2.3, 4.2 and 6.2 within the relevant period designated in this
Agreement (“Reconciliation Dispute”), the Reconciliation Dispute shall be submitted for
determination to a nationally recognized expert (the “Expert”) in the particular area of
disagreement mutually acceptable to the disputing parties and retained by the Corporation. The
Expert shall be a partner or principal in a nationally recognized accounting or law firm, and
unless the parties to the Reconciliation Dispute agree otherwise, the Expert shall not, and the
firm that employs the Expert shall not, have any material relationship with the parties to the
Reconciliation Dispute or other actual or potential conflict of interest. If the parties are unable
to agree on an Expert within fifteen (15) days of receipt by the respondent(s) of written notice of
a Reconciliation Dispute, the Expert shall be appointed by the International Chamber of Commerce
Centre for Expertise. The Expert shall resolve any matter relating to the Closing Date Basis
Recovery Letter or an amendment thereto, or the Early Termination Schedule or an amendment thereto
within 30 calendar days and shall resolve any matter relating to a Tax Benefit Schedule or an
amendment thereto within 15 calendar days or as soon thereafter as is reasonably practicable, in
each case after the matter has been submitted to the Expert for resolution. Notwithstanding the
preceding sentence, if the matter is not resolved before any payment that is the subject of a
disagreement would be due (in the absence of such disagreement) or any Tax Return reflecting the
subject of a disagreement is due, the undisputed amount shall be paid on the date prescribed by
this Agreement and such Tax Return may be filed as prepared by the Corporation, subject to
adjustment or amendment upon resolution. The parties to the Reconciliation Dispute shall bear their
own costs and expenses of such proceeding, unless (i) the Expert adopts the position of a party or
parties to the Resolution Dispute, in which case the party or parties whose position was not
adopted shall reimburse the party or parties whose position was adopted for any reasonable
out-of-pocket costs and expenses in such proceeding. Any dispute as to whether a dispute is a
Reconciliation Dispute within the meaning of this Section 7.9 shall be decided by the Expert. The
Expert shall finally determine any Reconciliation Dispute and the determinations of the Expert
pursuant to this Section 7.9 shall be binding on the parties to this Agreement and may be entered
and enforced in any court having jurisdiction.

     Section 7.10 Withholding. The Corporation shall be entitled to deduct and withhold
from any payment payable pursuant to this Agreement such amounts as the Corporation is required to
deduct and withhold with respect to the making of such payment under the Code or any provision of
state, local, or foreign tax law. To the extent that amounts are so withheld and paid over to the
appropriate Taxing Authority by the Corporation, such withheld amounts shall be treated for all
purposes of this Agreement as having been paid to the Members.

     Section 7.11 Treatment of a Consolidated Group; Transfers of Corporate Assets.

     (a) To the extent that the Corporation is or becomes a member of a consolidated, combined or
unitary group of corporations that files a consolidated, combined or unitary income tax return
pursuant to Sections 1501 et seq. of the Code or any provisions of state or local law, or would be
eligible to become a member of such a group at the election of one or members of that group, then:
(i) the provisions of this Agreement shall be applied with respect to the group as a whole; and
(ii) Tax Benefit Payments, Early Termination Payments, and other applicable items hereunder shall
be computed with reference to the group as a whole.

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     (b) If the Corporation transfers one or more assets to a corporation (or a Person classified
as a corporation for U.S. income tax purposes) with which such entity does not file a consolidated
tax return pursuant to Section 1501 of the Code, such entity, for purposes of calculating the
amount of any Tax Benefit Payment or Early Termination Payment (e.g., calculating the gross income
of the entity and determining the Realized Tax Benefit or Realized Tax Detriment of such entity)
due hereunder, shall be treated as having disposed of such asset in a fully taxable transaction on
the date of such contribution. The consideration deemed to be received by such entity shall be
equal to the fair market value of the contributed asset. For purposes of this Section 7.11, a
transfer of a partnership interest shall be treated as a transfer of the transferring partner’s
share of each of the assets and liabilities of that partnership.

     Section 7.12 Confidentiality.

     (a) Each of the Members acknowledges and agrees that the information of the Corporation and
its Affiliates and successors is confidential and, except in the course of performing any duties as
necessary for the Corporation and its Affiliates, as required by law or legal process or to enforce
the terms of this Agreement, such person shall keep and retain in the strictest confidence and not
disclose to any Person any confidential matters, acquired pursuant to this Agreement, of the
Corporation and its Affiliates and successors learned by such Member heretofore or hereafter. This
Section 7.12 shall not apply to (i) any information that has been made publicly available by the
Corporation or any of its Affiliates or successors or that is or becomes available to the public
(except as a result of an act of any Member or the Committee in violation of this Agreement), (ii)
the disclosure of information (A) to authorized directors, officers, representatives, agents and
employees of a Member or any of its Affiliates that agree to be bound by the provisions of this
Section 7.12 and as otherwise may be proper in the course of performing such Member’s
obligations, or enforcing such Member’s rights, under this Agreement, (B) as part of such Member’s
normal reporting, rating or review procedure (including normal credit rating and pricing process),
or in connection with such Member’s or such Member’s Affiliates’ normal fund raising, marketing,
informational or reporting activities, or to such Member’s (or any of its Affiliates’) Affiliates,
auditors, accountants, attorneys or other agents, (C) to any bona fide prospective assignee of such
Member’s rights under this Agreement, or prospective merger partner of such Member,
provided that such assignee or merger partner agrees to be bound by the provisions of this
Section 7.12, (D) as is required to be disclosed by order of a court of competent
jurisdiction, administrative body or governmental body, or by subpoena, summons or legal process,
or by law, rule or regulation; provided that any Member required to make such disclosure
pursuant to clause (D) above shall provide to the Corporation prompt notice of such
disclosure, or (E) to the extent necessary for a Member to prepare and file its Tax Returns, to
respond to any inquiries regarding the same from any Taxing Authority, or to prosecute or defend
any action, proceeding or audit by any Taxing Authority with respect to such Tax Returns.
Notwithstanding anything to the contrary herein, the Members (and each employee, representative or
other agent of the Members, as applicable) may disclose to any and all Persons, without limitation
of any kind, the tax treatment and tax structure of the Corporation, Aurora, and their Affiliates,
and any of their transactions, and all materials of any kind (including opinions or other tax
analyses) that are provided to the Members or the Committee relating to such tax treatment and tax
structure. Nothing in this Section 7.12 shall in any way limit or otherwise modify any
confidentiality covenants entered into by any employee of the Corporation or its Subsidiaries
pursuant to any other agreement entered into with the Corporation or any of its Subsidiaries.

     (b) If any of the Members or the Committee commits a breach, or threatens to commit a breach,
of any of the provisions of this Section 7.12, the Corporation or any of its Affiliates shall have
the right and remedy to have the provisions of this Section 7.12 specifically enforced by
injunctive relief or otherwise by any court of competent jurisdiction without the need to post any
bond or other security, it being acknowledged and agreed that any such breach or threatened breach
shall cause irreparable injury to the Corporation or any of its Affiliates and the accounts and
funds managed by the Corporation or any

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of its Affiliates, and that money damages alone shall not provide an adequate remedy to such
Persons. Such rights and remedies shall be in addition to, and not in lieu of, any other rights and
remedies available at law or in equity.

     Section 7.13 Member Committee.

     (a) Authority of the Committee. Except for situations in which the approval of a
Member or the Members collectively is expressly and specifically required by the express terms of
this Agreement, and subject to the other provisions set forth in this Section 7.13, the
Committee shall have the sole power to bind or take any action on behalf of the Members, or to
exercise any rights and powers granted to the Members under this Agreement (including, without
limitation, the full power and authority on each Member’s behalf (i) to receive and disburse any
Schedule or other document contemplated under this Agreement on behalf of such Member; (ii) to
execute and deliver on behalf of such Member, at the direction of such Member, any amendment or
waiver hereto; (iii) to take all other actions to be taken by or on behalf of such Member in
connection herewith; and (iv) to take certain actions, give or withhold certain consents or
approvals, or make certain determinations, opinions, judgments, or other decisions which such
Member or the Members collectively are permitted or required to take, give, withhold or make under
this Agreement). All decisions and actions by the Committee (to the extent authorized by this
Agreement) shall be binding upon all Members, and no Member shall have the right to object,
dissent, protest or otherwise contest the same.

     (b) Composition of the Committee.

          (i) Number and Appointment. The Committee shall consist of three (3) Representatives.
The holders of a majority of the Percentages designated on the Member Percentage Schedule as KRG
Percentages shall have the right to appoint one (1) Representative (the “KRG Representative”), the
holders of a majority of the Percentages designated on the Member Percentage Schedule as Summit
Percentages shall have the right to appoint one (1) Representative (the “Summit Representative”)
and the holders of a majority of the Percentages designated on the Member Percentage Schedule as
Management Percentages shall have the right to appoint one (1) Representative (the “Management
Representative”). The initial Committee shall consist of Christopher J. Bock (who shall be the initial KRG
Representative), Pete Connolly (who shall be the initial Summit Representative) and James C. New
(who shall be the initial Management Representative).

          (ii) Term; Removal. Each Representative appointed shall serve until a successor is
appointed by the Persons entitled to appoint such Representative hereunder by written notice to the
Corporation and the other Representatives or his or her earlier resignation, death or removal. A
Representative may resign at any time upon written notice to the Committee. The Person or Persons
entitled to designate a specific Representative shall be the only Person or Persons entitled to
remove such Representative.

          (iii) Vacancies. A vacancy in the Committee because of resignation, death or removal
of a Representative will be filled by the Person or Persons entitled to appoint such Representative
pursuant to the terms of this Section 7.13. If any Person or Persons fail to appoint a
Representative pursuant to the terms of this Section 7.13, such position in the Committee
shall remain vacant until such Person or Persons exercise their right to appoint a Representative
as provided hereunder.

     (c) Committee Actions; Meetings. Unless another percentage is set forth herein, any
determination or action required or permitted to be taken by the Committee may be taken at a
meeting at which a quorum is present by a majority of the Representatives then in office (through
meetings of the Committee pursuant to this Section 7.13). A majority of the
Representatives shall constitute a quorum sufficient for conducting meetings and making decisions.
Regular meetings of the Committee may be

- 19 -

 

held on such date and at such time and at such place as shall from time to time be determined
by the Committee. Special meetings of the Committee may be called from time to time by any two (2)
Representatives acting together. Notice of each special meeting of the Committee stating the date,
place and time of such meeting shall be delivered to each Representative by hand, telephone,
telecopy, overnight courier or the U.S. mail at least forty-eight (48) hours prior to any meeting
of the Committee. Notice may be waived before or after a meeting or by attendance without protest
at such meeting. Any action to be taken by the Committee may be taken at a meeting of the
Committee or by a written consent executed by all of the Representatives then in office.
Representatives may participate in a meeting of the Committee by means of telephone conference or
similar communications equipment by which all Persons participating in the meeting can communicate
with each other, and such participation in a meeting shall constitute presence in person at the
meeting. The Committee may adopt such other procedures governing meetings and the conduct of
business at such meetings as it shall deem appropriate. Any Representative unable to attend a
meeting of the Committee may designate another Representative as his or her proxy. Each
Representative shall have one vote on all matters before the Committee.

     (d) Delegation of Authority. The Committee may delegate its authority hereunder to any
Person and may retain service providers as it deems necessary to carry out its responsibilities
hereunder. Except as otherwise provided herein, the Committee may direct the Corporation in
writing to direct a pro rata portion all or any portion of payments to be made to the Members
hereunder to pay or reimburse any Person for the payment of any such service providers.

     (e) Limitation of Liability. Except as otherwise provided herein or in any agreement
entered into by such Person and the Corporation, no present or former Representative nor any such
Representative’s Affiliates, employees, agents or representatives shall be liable to any Member for
any act or omission performed or omitted by such Person in its capacity as Representative;
provided that, except as otherwise provided herein, such limitation of liability
shall not apply to the extent the act or omission was attributable to such Person’s bad faith,
willful misconduct or knowing violation of law or willful breach of this Agreement as determined by
a final judgment, order or decree of an arbitrator or a court of competent jurisdiction (which is
not appealable or with respect to which the time for appeal therefrom has expired and no appeal has
been perfected). Each Representative shall be entitled to rely upon the advice of legal counsel,
independent public accountants and other experts, including financial advisors, and any act of or
failure to act by such Representative in good faith reliance on such advice shall in no event
subject such Representative or any of such Representative’s Affiliates, employees, agents or
representatives to liability to any Member.

     (f) Indemnification.

          (i) Generally. Each Member hereby agrees, on an individual basis, for itself only and
not jointly and severally, to indemnify and hold harmless any Person (each an “Indemnified
Person”) against such Member’s Percentage of all expenses, liabilities and losses (including
attorney fees, judgments, fines, excise taxes or penalties) reasonably incurred or suffered by such
Person (or one or more of such Person’s Affiliates) by reason of the fact that such Person is or
was serving as a Representative or is or was acting pursuant to delegated authority of the
Committee if, in each case, such Indemnified Person acted in good faith and in a manner the Person
reasonably believed to be in or not opposed to the best interests of the Members and not in
violation of the express terms of this Agreement, and, with respect to any criminal action or
proceeding, had no reasonable cause to believe the Person’s conduct was unlawful. Expenses,
including attorneys’ fees and expenses, incurred by any such Indemnified Person in defending a
proceeding shall be paid by the Corporation (on behalf of the Members) in advance of the final
disposition of such proceeding, including any appeal therefrom, upon receipt of an undertaking by
or on behalf of such Indemnified Person to repay such amount if it shall ultimately be determined
that such Indemnified Person is not entitled to be indemnified hereunder.

- 20 -

 

          (ii) Nonexclusivity of Rights. The right to indemnification and the advancement of
expenses conferred in this Section 7.13(e) shall not be exclusive of any other right which
any Person may have or hereafter acquire under any statute, agreement, law or otherwise. Without
limiting the foregoing, each Member hereby acknowledges that one or more of the Indemnified Parties
may have certain rights to indemnification, advancement of expenses and/or insurance provided by an
Affiliated Institution. Each Member hereby agrees that, with respect to any such Indemnified
Parties, such Member (i) is, relative to each Affiliated Institution, the indemnitor of first
resort (i.e., its obligations to the applicable Indemnified Person under this Agreement are
primary and any duplicative, overlapping or corresponding obligations of an Affiliated Institution
are secondary), (ii) shall be required to make all advances and other payments under this
Agreement, and shall be fully liable therefor, without regard to any rights any Indemnified Person
may have against an Affiliated Institution, and (iii) irrevocably waives, relinquishes and releases
any such Affiliated Institution from any and all claims against such Affiliated Institution for
contribution, subrogation or any other recovery of any kind in respect thereof. Each Member further
agrees that no advancement or payment by an Affiliated Institution on behalf of an Indemnified
Person with respect to any claim for which such Indemnified Party has sought indemnification from
such Member hereunder shall affect the foregoing and any such Affiliated Institution shall have a
right of contribution and/or be subrogated to the extent of such advancement or payment to all of
the rights of recovery of any such applicable Indemnified Person against such Member. Each Member
agrees that each Affiliated Institution is an express third party beneficiary of the terms of this
Section 7.13(e)(ii).

          (iii) Limitation. Notwithstanding anything contained herein to the contrary (including
in this Section 7.13), any indemnity by the Members relating to the matters covered in this
Section 7.13 shall be provided by the Corporation (on behalf of the Members) and solely out
of and to the extent of the assets of the Corporation that would otherwise fund Tax Benefit
Payments or Early Termination Payments required to be made by the Corporation to the Members under
this Agreement, and no Member (unless such Member otherwise agrees in writing or is found in a
final decision by a court of competent jurisdiction to have personal liability on account thereof)
shall have personal liability on account thereof or shall be required return any portion of any
previously made Tax Benefit Payment to help satisfy any indemnification obligations hereunder. The
Corporation may withhold from the Members pro rata according to their percentages any amounts
advanced by the Corporation hereunder and the Committee may direct the Corporation in writing to
direct a pro rata portion all or any portion of payments to be made to the Members hereunder to pay
or reimburse any Indemnified Person to the extent entitled to indemnification hereunder.

          (f) Reliance. Each Member agrees that the Corporation shall be entitled to rely on any
action taken by the Committee, on behalf of such Member, pursuant to this Section 7.13 (an
“Authorized Action”), and that each Authorized Action shall be binding on each Member as fully as
if such Member had taken such Authorized Action.

     Section 7.14 Term of Agreement. No Tax Benefit Payment shall be required with respect
to any Taxable Year that begins after the end of the 30th Taxable Year following the Taxable Year
in which the Merger takes place; provided, however, that any unpaid Tax Benefit Payments and any
applicable interest, shall continue to accrue and be payable without regard to this Section 7.14.

* * * * *

- 21 -

 

     IN WITNESS WHEREOF, the Corporation, the Summit Funds, the Summit GPs, the SB Shareholders,
the KB Shareholders, and the Management Investors have duly executed this Agreement as of the date
first written above.

	 	 	 	 	 
	 	CORPORATION:

AURORA DIAGNOSTICS, INC.
 	 
	 	By:  	 	 
	 
	 	Name:  	 	 
	 
	 	Its: 	 	 
	 

Signature Page to Tax Receivable Agreement

 

 

	 	 	 	 	 
	 	SUMMIT FUNDS:

SUMMIT VENTURES VI-A, L.P.

 	 
	 	By:  	Summit Partners VI (GP), L.P.
 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	                Summit Partners VI (GP), LLC
 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	 	 
	 	Name:  	 	 
	 	Its: 	Member 	 
	 
	 
	 	SUMMIT VI ADVISORS FUND, L.P.

 	 
	 	By:  	Summit Partners VI (GP), L.P.
 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	Summit Partners VI (GP), LLC 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	
 	 
	 	Name:  	 	 
	 	Its: 	Member 	 
	 
	 
	 	SUMMIT VI ENTREPRENEURS FUND, L.P.

 	 
	 	By:  	Summit Partners VI (GP), L.P.
 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	              Summit Partners VI (GP), LLC
 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	
 	 
	 	Name:  	 	 
	 	Its: 	Member 	 
	 

Signature Page to Tax Receivable Agreement

 

 

	 	 	 	 	 
	 	SUMMIT INVESTORS VI, L.P.

 	 
	 	By:  	Summit Partners VI (GP), L.P.
 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	               Summit Partners VI (GP), LLC
 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	 	 
	 	Name:  	 	 
	 	Its: 	Member 	 
	 
	 
	 	SUMMIT PARTNERS PRIVATE EQUITY FUND VII-A, L.P.,

 	 
	 	By:  	Summit Partners PE VII, L.P. 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	           Summit Partners PE VII, LLC
 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	 	 
	 	Name:  	 	 
	 	Its: 	Member 	 
	 
	 
	 	SUMMIT GPS:

SUMMIT PARTNERS VI (GP), L.P.

 	 
	 	By:  	Summit Partners VI (GP), LLC
 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	 	 
	 	Name:  	 	 
	 	Its: 	Member 	 
	 
	 
	 	SUMMIT PARTNERS PE VII, L.P.

 	 
	 	By:  	Summit Partners PE VII, LLC
 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	
 	 
	 	Name:  	 	 
	 	Its: 	Member 	 
	 

Signature Page to Tax Receivable Agreement

 

 

	 	 	 	 	 
	 	SB SHAREHOLDERS:

SUMMIT VENTURES VI-B, L.P.

 	 
	 	By:  	Summit Partners VI (GP), L.P.
 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	                Summit Partners VI (GP), LLC
 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	
 	 
	 	Name:  	 	 
	 	Its: 	Member 	 
	 
	 
	 	SUMMIT PARTNERS PRIVATE EQUITY FUND VII-B, L.P.

 
	 	By:  	Summit Partners PE VII, L.P.
 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	           Summit Partners PE VII, LLC
 	 
	 	Its: 	General Partner 	 
	 
	 	By:  	
 	 
	 	Name:  	 	 
	 	Its: 	Member 	 
	 

Signature Page to Tax Receivable Agreement

 

 

	 	 	 	 	 
	 	KB SHAREHOLDERS:

KRG CAPITAL FUND IV, L.P.

 	 
	 	By:  	 	 
	 
	 	Name:  	 	 
	 
	 	Its: 	 	 
	 
	 
	 	KRG CAPITAL FUND IV-A, L.P.

 	 
	 	By:  	 	 
	 
	 	Name:  	 	 
	 
	 	Its: 	 	 
	 
	 
	 	KRG CAPITAL FUND IV (FF), L.P.

 	 
	 	By:  	 	 
	 
	 	Name:  	 	 
	 
	 	Its: 	 	 
	 
	 
	 	KRG CAPITAL FUND IV (PA), L.P.

 	 
	 	By:  	 	 
	 
	 	Name:  	 	 
	 
	 	Its: 	 	 
	 
	 
	 	KRG CO-INVESTMENT, L.L.C.

 	 
	 	By:  	 	 
	 
	 	Name:  	 	 
	 
	 	Its: 	 	 
	 

Signature Page to Tax Receivable Agreement

 

 

	 	 	 

	 
	 	MANAGEMENT INVESTORS:
	 
	 	 
	 

	 	JAMES C. NEW
	 
	 	 
	 
	 	 
	 

	 	 
	 
	 	 
	 
	 	 
	 

	 	MARTIN J. STEFANELLI
	 
	 	 
	 
	 	 
	 

	 	 
	 
	 	 
	 
	 	 
	 

	 	CHRISTOPHER JAHNLE
	 
	 	 
	 
	 	 
	 

	 	 
	 
	 	 
	 
	 	 
	 

	 	KIRK A. REBANE
	 
	 	 
	 
	 	 
	 

	 	 
	 
	 	 
	 
	 	 
	 

	 	FRED FERRARA
	 
	 	 
	 
	 	 
	 

	 	 
	 
	 	 
	 
	 	 
	 

	 	GREG MARSH
	 
	 	 
	 
	 	 
	 

	 	 
	 
	 	 
	 
	 	 
	 

	 	MICHAEL NULL
	 
	 	 
	 
	 	 
	 

	 	 
	 
	 	 
	 
	 	 
	 

	 	MICHAEL GRATTENDICK
	 
	 	 
	 
	 	 
	 

	 	 
	 
	 	 
	 
	 	 
	 

	 	DEANNA SHACKLEY
	 
	 	 
	 
	 	 
	 

	 	 
	 
	 	 
	 
	 	 

Signature Page to Tax Receivable Agreementexv10w4

Exhibit 10.4

AGREEMENT AND PLAN OF MERGER

     THIS AGREEMENT AND PLAN OF MERGER (as amended, supplemented or restated from time to time,
this “Agreement”) is entered into as of ___________, by and among Aurora Diagnostics, Inc.,
a Delaware corporation (“ARDX Inc.”), Aurora Diagnostics Holdings, LLC, a Delaware limited
liability company (“Aurora LLC”), SV VI-B Aurora Blocker Corp., a Delaware corporation
(“Summit Blocker 1”), SPPE VII-B Aurora Blocker Corp., a Delaware corporation (“Summit
Blocker 2”), KRG Aurora Blocker, Inc., a Delaware corporation (“KRG Blocker”; Aurora
LLC, KRG Blocker, Summit Blocker 1 and Summit Blocker 2 are referred to collectively herein as the
“Merging Entities”, and each individually as a “Merging Entity”; Summit Blocker 1,
Summit Blocker 2 and KRG Blocker are referred to collectively herein as the “Corporate Merging
Entities”, and each individually as a “Corporate Merging Entity”; the Corporate Merging
Entities and ARDX Inc. are referred to collectively herein as the “Corporate Merger Constituent
Entities”; Aurora LLC and ARDX Inc. are referred to collectively herein as the “LLC Merger
Constituent Entities”), Summit Ventures VI-B, L.P., a Delaware limited partnership and the sole
stockholder of Summit Blocker 1, Summit Partners Private Equity Fund VII-B, L.P., a Delaware
limited partnership and the sole stockholder of Summit Blocker 2 (collectively, the “Summit
Blocker Stockholders”), KRG Capital Fund IV, L.P., a Delaware limited partnership, KRG Capital
Fund IV-A, L.P., a Delaware limited partnership, KRG Capital Fund IV (FF), L.P., a Delaware limited
partnership, KRG Capital Fund IV (PA), L.P., a Delaware limited partnership, and KRG Co-Investment,
L.L.C., a Delaware limited liability company (collectively, the “KRG Blocker
Stockholders”), the affiliates of Summit Partners, L.P. set forth as “Summit Non-Blocker
Members” on the signature pages to this Agreement (the “Summit Non-Blocker Members”; Summit
Blocker 1, Summit Blocker 2, and the Summit Non-Blocker Members are referred to collectively as the
“Summit Members”) and the individual members of Aurora LLC set forth as “Management
Members” on the signature pages to this Agreement (collectively, the “Management Members”;
the Summit Members, KRG Blocker and the Management Members are referred to collectively as
“Aurora LLC Members”).

RECITALS

     A. The board of directors of ARDX Inc. deems it advisable and in the best interests of ARDX
Inc. that (i) ARDX Inc. undertake the Corporate Merger (as defined in Section 1.1(a))
pursuant to the provisions of the General Corporation Law of the State of Delaware (the
“DGCL”) and the terms of this Agreement, and (ii) ARDX Inc. undertake the LLC Merger (as
defined in Section 1.1(b)) pursuant to the provisions of the Limited Liability Company Act
of the State of Delaware (the “LLC Act”) and the terms of this Agreement.

     B. With respect to (i) each Corporate Merging Entity, the board of directors of such Corporate
Merging Entity deems it advisable and in the best interests of such Corporate Merging Entity and
its stockholders that the Corporate Merger be consummated pursuant to the provisions of the DGCL
and the terms of this Agreement, and (ii) Aurora LLC, the board of managers of Aurora LLC deems it
advisable and in the best interests of Aurora LLC and its members that the LLC Merger be
consummated pursuant to the provisions of the DGCL and the LLC Act and the terms of this Agreement.

     C. With respect to (i) each Corporate Merger Constituent Entity, all of the outstanding stock
of such Corporate Merger Constituent Entity entitled to vote on the Corporate Merger has been voted
for the Corporate Merger and the adoption of this Agreement, and (ii) each LLC Merger Constituent
Entity, the requisite members of such LLC Merger Constituent Entity (in the case of Aurora LLC) and
all of the outstanding stock (in the case of ARDX Inc.) entitled to vote on the LLC Merger have
voted for the LLC Merger and the adoption of this Agreement.

 

 

     NOW, THEREFORE, in consideration of the mutual agreements contained herein and for other good
and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereto agree as follows:

ARTICLE I

THE MERGERS

     SECTION 1.1 The Mergers. Upon the terms and subject to the conditions set forth in
this Agreement:

     (a) at the Corporate Merger Effective Time (as defined in Section 1.2), each Corporate
Merging Entity shall be merged with and into ARDX Inc. in accordance with the provisions of Section
251 of the DGCL (the “Corporate Merger”) and, following the Corporate Merger, ARDX Inc.
will continue as the surviving entity (the “Surviving Entity”) and the separate existence
of each Corporate Merging Entity shall cease; and

     (b) at the LLC Merger Effective Time (as defined in Section 1.2), Aurora LLC shall be
merged with and into ARDX Inc. in accordance with the provisions of Section 209 of the LLC Act (the
“LLC Merger”) and, following the LLC Merger, ARDX Inc. will continue as the Surviving
Entity and the separate existence of Aurora LLC shall cease.

     SECTION 1.2 Effective Times.

     (a) The Corporate Merger will be consummated on the Closing Date (as defined in Section
2.1) by the filing of a certificate of merger substantially in the form of Exhibit A
(the “Corporate Merger Certificate”) with the Secretary of State of the State of Delaware
in accordance with Section 251 of the DGCL. The time of the filing of the Corporate Merger
Certificate or the time specified therein as the effective time of the Corporate Merger is referred
to herein as “Corporate Merger Effective Time.”

     (b) The LLC Merger will be consummated on the Closing Date by the filing of a certificate of
merger substantially in the form of Exhibit B (the “LLC Merger Certificate”) with
the Secretary of State of the State of Delaware in accordance with Section 209 of the LLC Act. The
time of the filing of the LLC Merger Certificate or the time specified therein as the effective
time of the LLC Merger is referred to herein as “LLC Merger Effective Time.”

     (c) The Corporate Merger Effective Time shall be prior to the LLC Merger Effective Time.

     SECTION 1.3 Effect of the Mergers.

     (a) The Corporate Merger will have the effects set forth in Section 259 of the DGCL. Without
limiting the generality of the foregoing, as of the Corporate Merger Effective Time, all of the
respective properties, rights, privileges, powers and franchises of each Corporate Merging Entity
will vest in ARDX Inc., as the Surviving Entity, and all of the respective debts, liabilities and
duties of each Corporate Merging Entity will become debts, liabilities and duties of ARDX Inc., as
the Surviving Entity.

     (b) The LLC Merger will have the effects set forth in Section 259 of the DGCL and Section 209
of the LLC Act. Without limiting the generality of the foregoing, as of the LLC Merger Effective
Time, all of the properties, rights, privileges, powers and franchises of Aurora LLC will vest in

2

 

ARDX Inc., as the Surviving Entity, and all of the debts, liabilities and duties of Aurora LLC will
become debts, liabilities and duties of ARDX Inc., as the Surviving Entity.

     SECTION 1.4 Certificate of Incorporation and Bylaws.

     (a) The certificate of incorporation of ARDX Inc. as in effect immediately preceding the
Corporate Merger Effective Time shall remain unchanged as a result of the Corporate Merger and
shall continue as the certificate of incorporation of the Surviving Entity following the Corporate
Merger. The bylaws of ARDX Inc. as in effect immediately preceding the Corporate Merger Effective
Time shall remain unchanged as a result of the Corporate Merger and shall continue as the bylaws of
the Surviving Entity following the Corporate Merger.

     (b) The certificate of incorporation of ARDX Inc. as in effect immediately preceding the LLC
Merger Effective Time shall remain unchanged as a result of the LLC Merger and shall continue as
the certificate of incorporation of the Surviving Entity following the LLC Merger. The bylaws of
ARDX Inc. as in effect immediately preceding the LLC Merger Effective Time shall remain unchanged
as a result of the LLC Merger and shall continue as the bylaws of the Surviving Entity following
the LLC Merger.

     SECTION 1.5 Directors and Officers.

     (a) The directors of the Surviving Entity shall be James C. New, Thomas S. Roberts,
Christopher Dean, Peter J. Connolly, Mark M. King, Christopher J. Block, Blair Tikker and James M.
Emanuel, who will hold office from the Corporate Merger Effective Time until their respective
successors are duly elected and qualified in the manner provided in the certificate of
incorporation and bylaws of the Surviving Entity or as otherwise provided by law. The officers of
ARDX Inc. at the Corporate Merger Effective Time shall continue as the officers of the Surviving
Entity, and will hold office from the Corporate Merger Effective Time until their respective
successors are duly elected or appointed and qualified in the manner provided in the bylaws of the
Surviving Entity or as otherwise provided by law.

     (b) The directors of the Surviving Entity shall be James C. New, Thomas S. Roberts,
Christopher Dean, Peter J. Connolly, Mark M. King, Christopher J. Block, Blair Tikker and James M.
Emanuel, who will hold office from the LLC Merger Effective Time until their respective successors
are duly elected and qualified in the manner provided in the certificate of incorporation and
bylaws of the Surviving Entity or as otherwise provided by law. The officers of ARDX Inc. at the
LLC Merger Effective Time shall continue as the officers of the Surviving Entity, and will hold
office from the LLC Merger Effective Time until their respective successors are duly elected or
appointed and qualified in the manner provided in the bylaws of the Surviving Entity or as
otherwise provided by law.

     SECTION 1.6 Conversion of Interests; Cancellation of Certain ARDX Common Stock.

     (a) At the Corporate Merger Effective Time, each of the following transactions shall be deemed
to occur simultaneously, subject to Section 1.7:

	 	(i)	 	the shares of common stock of Summit Blocker 1 outstanding
immediately prior to the Corporate Merger Effective Time shall, by virtue of
the Corporate Merger and without any action on the part of the holder thereof,
be converted into and become (A) an aggregate of [•] shares of Common Stock,
par value $0.01 per share, of ARDX Inc. (“ARDX Common Stock”) and (B)
the right to receive certain payments in the amounts set forth in the Tax
Receivable Agreement (the “TRA Agreement”), dated as of [•], by and
among ARDX Inc., the Summit

3

 

	 	 	 	Blocker Stockholders, the Summit Non-Blocker Members, the Management
Members, and the KRG Blocker Stockholders, attached hereto as Exhibit
C (“TRA Payments”);

	 	(ii)	 	the shares of common stock of Summit Blocker 2 outstanding
immediately prior to the Corporate Merger Effective Time shall, by virtue of
the Corporate Merger and without any action on the part of the holder thereof,
be converted into and become (A) an aggregate of [•] shares of ARDX Common
Stock and (B) the right to receive TRA Payments; and

	 	(iii)	 	the shares of common stock of KRG Blocker outstanding
immediately prior to the Corporate Merger Effective Time shall, by virtue of
the Corporate Merger and without any action on the part of the holder thereof,
be converted into and become (A) an aggregate of [•] shares of ARDX Common
Stock and (B) the right to receive TRA Payments.

     (b) At the LLC Merger Effective Time, each of the following transactions shall be deemed to
occur simultaneously, subject to Section 1.7:

	 	(i)	 	the Class A-1 Units of Aurora LLC outstanding immediately
prior to the LLC Merger Effective Time shall, by virtue of the LLC Merger and
without any action on the part of the holder thereof, be converted into and
become (A) an aggregate of [•] shares of ARDX Common Stock and (B) the right
to receive TRA Payments;

	 	(ii)	 	the Class A Units of Aurora LLC outstanding immediately prior
to the LLC Merger Effective Time shall, by virtue of the LLC Merger and
without any action on the part of the holder thereof, be converted into and
become (A) an aggregate of [•] shares of ARDX Common Stock and (B) the right
to receive TRA Payments;

	 	(iii)	 	the Class B Units of Aurora LLC outstanding immediately
prior to the LLC Merger Effective Time shall, by virtue of the LLC Merger and
without any action on the part of the holder thereof, be converted into and
become (A) an aggregate of [•] shares of ARDX Common Stock and (B) the right
to receive TRA Payments;

	 	(iv)	 	the Class C Units of Aurora LLC outstanding immediately prior
to the LLC Merger Effective Time shall, by virtue of the LLC Merger and
without any action on the part of the holder thereof, be [converted into and
become (A) an aggregate of [•] shares of ARDX Common Stock and (B) the right
to receive TRA Payments][cancelled without consideration];

	 	(v)	 	the Class D-1 Units of Aurora LLC outstanding immediately
prior to the LLC Merger Effective Time shall, by virtue of the LLC Merger and
without any action on the part of the holder thereof, be [converted into and
become (A) an aggregate of [•] shares of ARDX Common Stock and (B) the right
to receive TRA Payments][cancelled without consideration];

	 	(vi)	 	the Class D-2 Units of Aurora LLC outstanding immediately
prior to the LLC Merger Effective Time shall, by virtue of the LLC Merger and
without any

4

 

	 	 	 	action on the part of the holder thereof, be [converted into and become (A)
an aggregate of [•] shares of ARDX Common Stock and (B) the right to receive
TRA Payments][cancelled without consideration]; and

	 	(vii)	 	the Class D-3 Units of Aurora LLC outstanding immediately
prior to the LLC Merger Effective Time shall, by virtue of the LLC Merger and
without any action on the part of the holder thereof, be [converted into and
become (A) an aggregate of [•] shares of ARDX Common Stock and (B) the right
to receive TRA Payments][cancelled without consideration].

     (c) Each share of ARDX Common Stock issued and outstanding immediately prior to the Corporate
Merger Effective Time shall, by virtue of the Corporate Merger and without any action on the part
of the holder thereof, cease to be outstanding, shall be cancelled and retired without payment of
any consideration therefore and shall cease to exist.

     (d) The parties acknowledge that ARDX Inc. is issuing the ARDX Common Stock to the
stockholders of the respective Corporate Merging Entities pursuant to Section 1.6(a) and
Aurora LLC Members pursuant to Section 1.6(b) in reliance upon (i) the representations
given by such stockholder or member as a “Subscribing Party” in Section 1.8(h), and (ii) if
applicable, the respective representations and warranties given by such stockholder as a Summit
Blocker Stockholder or the KRG Blocker Stockholder, as the case may be, in Section 1.8.

     (e) The parties to this Agreement hereby acknowledge that ARDX Inc. shall be obligated to make
payments in the amounts and under the terms and conditions set forth in the TRA Agreement.

     Section 1.7 No Fractional Shares. Notwithstanding anything to the contrary in
Section 1.6, no fractional shares of ARDX Common Stock will be issued. If the number of
shares of ARDX Common Stock to be received by the stockholder of a Corporate Merging Entity or an
Aurora LLC Member is not a whole number, then the number of shares of ARDX Common Stock that such
person shall be entitled to receive pursuant to this Agreement shall be rounded up or down to the
nearest whole share (with one-half being rounded up).

     Section 1.8 Certain Representations.

     (a) Representations and Warranties of the Merging Entities. Each Merging Entity hereby
makes the following representations and warranties to ARDX Inc. solely with respect to itself and
not with respect to any other Merging Entity:

     (i) Such Merging Entity is a corporation or limited liability company, as applicable,
duly organized, validly existing and in good standing under the laws of its jurisdiction of
incorporation or organization with full corporate or other organizational power and
authority to carry on its business as it is now being conducted and to own, operate and
lease its properties and assets.

     (ii) Except as set forth on Schedule 1.8(a)(ii), such Merging Entity does not
own, is not obligated and does not have a right to purchase any equity interest in or any
other security convertible into or exchangeable for an equity interest in any entity.

     (iii) The authorized, issued and outstanding equity interests (including for the
avoidance of doubt, capital stock and membership interests, as applicable) of such Merging
Entity on a fully diluted basis on the date hereof, and without giving effect to any of the
transactions

5

 

contemplated hereby, are held beneficially and of record by the persons set forth on
Schedule 1.8(a)(iii). Except as set forth on Schedule 1.8(a)(iii), such
Merging Entity does not have any contracts containing any profit participation features,
appreciation rights or phantom equity interests, or similar contracts that allow any person
to participate in the equity of such Merging Entity. Except as set forth on Schedule
1.8(a)(iii), such Merging Entity is not subject to any contract or obligation
(contingent or otherwise) to issue, repurchase, purchase, redeem or otherwise acquire or
retire any equity interests of, or securities or obligations of any kind convertible into
equity interests (including options) of, such Merging Entity. Except as set forth on
Schedule 1.8(a)(iii), there are no equity interests of such Merging Entity that are
currently reserved for issuance and/or may be required to be issued upon the occurrence of
any event or condition. Except as set forth on Schedule 1.8(a)(iii), there are no
contracts that are binding upon such Merging Entity with respect to the voting, transfer,
encumbrance of the equity interests of such Merging Entity or with respect to any aspect of
such Merging Entity’s governance or dividends or distributions. The equity interest record
books of such Merging Entity that have been delivered to ARDX Inc. and/or its
representatives for inspection prior to the date hereof are complete and correct in all
material respects.

     (iv) Except as set forth on Schedule 1.8(a)(iv), all of the outstanding equity
interests of such Merging Entity are duly authorized, validly issued, fully paid and (if
such Merging Entity is a corporation) nonassessable, were issued by such Merging Entity in
compliance with all applicable regulations, are not subject to, nor were they issued in
violation of, any purchase option, call option, right of first refusal, first offer, co-sale
or participation, preemptive right, subscription right or any similar right.

     (v) Such Merging Entity (i) (A) with respect to each Corporate Merging Entity, was
formed solely for the purpose of directly or indirectly acquiring and holding equity
interests in Aurora LLC, and (B) with respect to Aurora LLC, was formed solely for the
purpose of acquiring and holding equity interests in Aurora Diagnostics, LLC (“Aurora
Diagnostics”), (ii) (A) with respect to each Corporate Merging Entity, has not engaged
in any business or operations or otherwise incurred any liability, indebtedness or
obligations other than in connection with direct or indirect owning and holding equity
interests in Aurora LLC, and (B) with respect to Aurora LLC, has not engaged in any business
or operations or otherwise incurred any liability, indebtedness or obligations other than in
connection with owning and holding equity interests in Aurora Diagnostics, and (iii) except
as set forth on Schedule 1.8(a)(v) does not have any employees or independent
contractors, (iv) except as set forth on Schedule 1.8(a)(v), has not entered into
any contracts other than its organizational documents, subscription agreements for the sale
of its equity interests (all of which equity interests are outstanding and will be cancelled
in the applicable Merger), and (A) with respect to each Corporate Merging Entity, the
limited liability company agreement of Aurora LLC, and (B) with respect to Aurora LLC, the
limited liability company agreement of Aurora Diagnostics, (v) (A) with respect to each
Corporate Merging Entity, does not have, hold or own any assets other than the equity
interests in Aurora LLC, and (B) with respect to Aurora LLC, does not have, hold or own any
assets other than the equity interests in Aurora Diagnostics, (vi) except as set forth on
Schedule 1.8(a)(v), is not a party to any claims or litigation and (vii) except as
set forth on Schedule 1.8(a)(v) does not have any obligations to make any
investments.

     (vi) Such Merging Entity has timely filed or caused to be timely filed (taking into
account any applicable extension of time within which to file) with the appropriate taxing
authorities all federal, state, foreign and local tax returns, if any, required to be filed
prior to the Closing Date. All taxes and tax liabilities due and payable by or with respect
to the income,

6

 

assets or operations of such Merging Entity, if any, for all taxable years or other
taxable periods that end prior to the Closing Date have been timely paid in full prior to
the Closing.

     (vii) Such Merging Entity has operated in compliance in all material respects with all
applicable regulations and orders. There are no claims pending, or to the knowledge of such
Merging Entity threatened, against such Merging Entity, nor has such Merging Entity received
any written notice, regarding any violations of any regulations or orders enforced by any
authority claiming jurisdiction over such Merging Entity.

     (b) Representations and Warranties of the Investors. Each Summit Blocker Stockholder,
each KRG Blocker Stockholder and each Aurora LLC Member (collectively, the “Investors” and
each, an “Investor”) hereby makes the following representations and warranties to ARDX Inc.
solely with respect to itself and not with respect to any other Investor:

     (i) such Investor owns beneficially and of record the equity interests of the Merging
Entity set forth on Schedule 1.8(a)(iii) free and clear of all liens, orders,
contracts or other encumbrances whatsoever and has full right, power and authority to vote
the equity interests of the Merging Entity held by such Investor;

     (ii) such Investor is an “accredited investor” (as defined in Regulation D promulgated
under the Securities Act of 1933, as amended (the “Securities Act”));

     (iii) such Investor has had (or its respective representatives have had) access to the
same kind of information concerning ARDX Inc. that is required by Schedule A of the
Securities Act, to the extent that ARDX Inc. possesses such information;

     (iv) such Investor has such knowledge and experience in financial and business matters
that it is capable of utilizing the information that is available to it concerning ARDX Inc.
to evaluate the risks of investment in ARDX Inc. including the risk that it could lose its
entire investment in ARDX Inc.;

     (v) such Investor understands that the shares of ARDX Common Stock to be issued to or
received by it as described, as applicable, in Section 1.6(a) and/or Section
1.6(b) (the “Issued Shares”) have not been registered under the Securities Act,
the securities laws of any state or the securities laws of any other jurisdiction and that
such Issued Shares must be held indefinitely unless the sale or transfer is registered under
the Securities Act and such other securities laws or an exemption from registration under
the Securities Act and such other securities laws covering the sale or transfer of such
Issued Shares is available;

     (vi) such Investor is purchasing the Issued Shares (other than any Issued Shares
intended to be sold in connection with the underwritten initial public offering (the
“IPO”) of ARDX Inc.’s Common Stock, par value $0.01 per share) for its own account
for investment and not with a view to, or for resale in connection with, a public offering
or distribution thereof in violation of the Securities Act;

     (vii) such Investor understands that the certificate or certificates representing the
Issued Shares (if certificated, and other than any Issued Shares intended to be sold in the
IPO) may be impressed with a legend stating that the Issued Shares have not been registered
under the Securities Act or state securities laws and setting out or referring to the
restrictions on the transferability and resale of the Issued Shares; and

7

 

     (viii) such Investor understands that stop transfer instructions in respect of the
Issued Shares may be issued to any transfer agent, transfer clerk or other agent at any time
acting for ARDX Inc.

     Section 1.9 ARDX Inc. Representations. ARDX Inc. hereby makes the following
representations and warranties to each of the Merging Entities, the Summit Blocker Stockholders,
the KRG Blocker Stockholders and the Aurora LLC Members:

     (a) ARDX Inc. is a corporation duly organized, validly existing and in good standing under the
laws of its jurisdiction of incorporation with full corporate power and authority to carry on its
business as it is now being conducted and to own, operate and lease its properties and assets.

     (b) The ARDX Common Stock to be issued in accordance with Section 1.6(a) and
Section 1.6(b) will be duly authorized by all necessary corporate action on the part of
ARDX Inc. and, when issued in accordance with the terms hereof, will be validly issued, fully paid
and non-assessable.

     Section 1.10 Tax Matters.

     (a) Each of the Corporate Merger Constituent Entities intend for and will use all reasonable
best efforts to cause the Corporate Merger to qualify as a reorganization under Section 368(a) of
the Internal Revenue Code of 1986, as amended (the “Code”), with respect to ARDX Inc. and
each of the Corporate Merging Entities, and no party hereto will take any position inconsistent
with the status of the Corporate Merger as such a reorganization on any Tax Return (as defined
below) or related document or in any proceeding before a Tax authority.

     (b) Each of the LLC Merger Constituent Entities intend for and will use all reasonable best
efforts to cause the LLC Merger to qualify as a transfer under Section 351 of the Code with respect
to ARDX Inc., Aurora LLC, the Summit Non-Blocker Members and the Management Members, and no party
hereto will take any position inconsistent with the status of the LLC Merger as such a transfer on
any Tax Return or related document or in any proceeding before a Tax authority.

ARTICLE II

CLOSING

     Section 2.1 The Closing.

     (a) Promptly following the execution hereof, each Corporate Merger Constituent Entity shall
deliver to each other Corporate Merger Constituent Entity evidence of the adoption of this
Agreement and the approval of the Corporate Merger by the requisite vote of such Corporate Merger
Constituent Entity’s stockholders.

     (b) Promptly following the execution hereof, each LLC Merger Constituent Entity shall deliver
to the other LLC Merger Constituent Entity evidence of the adoption of this Agreement and the
approval of the LLC Merger by the requisite vote, as applicable, of such LLC Merger Constituent
Entity’s stockholders or members.

     (c) Subject to the delivery of such evidence set forth in Section 2.1(a) and
Section 2.1(b), the consummation of the Corporate Merger and the LLC Merger (the
“Closing”) will take place at the offices of Alston & Bird LLP, 90 Park Avenue, New York,
NY 10016, on the date hereof (the “Closing Date”).

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     Section 2.2 Closing Date Events.

     (a) At the Closing, each of the Corporate Merger Constituent Entities shall cause the
Corporate Merger Certificate to be filed as provided in Section 1.2(a).

     (b) At the Closing, each of the LLC Merger Constituent Entities shall cause the LLC Merger
Certificate to be filed as provided in Section 1.2(b).

ARTICLE III

MISCELLANEOUS

     Section 3.1 Indemnification.

     (a) Summit Ventures VI-B, L.P. shall indemnify and hold harmless ARDX Inc. (and its respective
officers, directors, employees, agents and representatives) for any and all loss, liability, claim,
damage and expense (including the cost of investigation and reasonable attorneys’ fees and
expenses), whether or not involving a third-party claim, arising, directly or indirectly, from or
in connection with any breach of any representation or warranty made by Summit Ventures VI-B, L.P.
or Summit Blocker 1 in this Agreement.

     (b) Summit Partners Private Equity Fund VII-B, L.P. shall indemnify and hold harmless ARDX
Inc. (and its respective officers, directors, employees, agents and representatives) for any and
all loss, liability, claim, damage and expense (including the cost of investigation and reasonable
attorneys’ fees and expenses), whether or not involving a third-party claim, arising, directly or
indirectly, from or in connection with any breach of any representation or warranty made by Summit
Partners Private Equity Fund VII-B, L.P. or Summit Blocker 2 in this Agreement.

     (c) Each KRG Blocker Stockholder shall indemnify and hold harmless ARDX Inc. (and its
respective officers, directors, employees, agents and representatives) for any and all loss,
liability, claim, damage and expense (including the cost of investigation and reasonable attorneys’
fees and expenses), whether or not involving a third-party claim, arising, directly or indirectly,
from or in connection with any breach of any representation or warranty made by such KRG Blocker
Stockholder or KRG Blocker in this Agreement.

     (d) Each Aurora LLC Member shall indemnify and hold harmless ARDX Inc. (and its respective
officers, directors, employees, agents and representatives) for any and all loss, liability, claim,
damage and expense (including the cost of investigation and reasonable attorneys’ fees and
expenses), whether or not involving a third-party claim, arising, directly or indirectly, from or
in connection with any breach of any representation or warranty made by such Aurora LLC Member in
this Agreement.

     Section 3.2 Counterparts. This Agreement may be executed in one or more counterparts
(which may be delivered by facsimile or electronic transmission), all of which shall be considered
one and the same agreement, and shall become effective when one or more such counterparts have been
signed by each party hereto and delivered to the other parties hereto.

     Section 3.3 Termination.

     (e) Notwithstanding anything herein to the contrary, the Corporate Merger may be abandoned by
agreement of each of the Corporate Merger Constituent Entities at any time prior to the

9

 

Corporate Merger Effective Time. Any such abandonment of the Corporate Merger shall be deemed
to constitute and effect the simultaneous termination of this Agreement with respect to all of the
rights and obligations of each Corporate Merger Constituent Entity hereunder.

     (f) Notwithstanding anything herein to the contrary, the LLC Merger may be abandoned by
agreement of each of the LLC Merger Constituent Entities at any time prior to the LLC Merger
Effective Time. Any such abandonment of the LLC Merger shall be deemed to constitute and effect
the simultaneous termination of this Agreement with respect to all of the rights and obligations of
each LLC Merger Constituent Entity hereunder.

     Section 3.4 Further Assurances. If at any time the Surviving Entity shall consider or
be advised that any further assignment or assurances in law are necessary or desirable to vest in
the Surviving Entity the title to any property or rights of the Merging Entities, the respective
stockholders or members, as applicable, and officers of each Merging Entity shall grant the
stockholders and officers of the Surviving Entity a limited power of attorney to execute and make
all such proper assignments and assurances in law and to do all things necessary and proper to thus
vest such property or rights in the Surviving Entity, and otherwise to carry out the purposes of
this Agreement.

     Section 3.5 Governing Law. This Agreement and any disputes arising under or related
thereto shall be governed by and construed in accordance with the internal laws of the State of
Delaware applicable to agreements made and to be performed entirely within such State, without
regard to the conflicts of law principles of such State.

ARTICLE IV

TAX INDEMNITY

     SECTION 4.1 Definitions.

     (a) “Tax Return” means any return, declaration, report, claim for refund, information
return, or other document (including any related or supporting estimates, elections, schedules,
statements, or information), including any amendments thereto, filed or required to be filed in
connection with the determination, assessment, or collection of any Tax or the administration of
any legal requirements relating to any Tax.

     (b) “Tax” or “Taxes” (and with correlative meaning, “Taxable” and
“Taxing”) means (i) any federal, state, provincial, local, foreign or other income,
alternative, minimum, add-on minimum, accumulated earnings, personal holding company, franchise,
capital stock, net worth, capital, profits, intangibles, windfall profits, gross receipts, value
added, sales, use, goods and services, excise, customs duties, transfer, conveyance, mortgage,
registration, stamp, documentary, recording, premium, severance, environmental (including taxes
under Section 59A of the Code), natural resources, real property, personal property, ad valorem,
intangibles, rent, occupancy, license, occupational, employment, unemployment insurance, social
security, disability, workers’ compensation, payroll, health care, withholding, estimated or other
taxes, duties, levies or other similar governmental charges or assessments or deficiencies thereof
(including all interest and penalties thereon and additions thereto whether disputed or not) and
(ii) any liability in respect of any items described in clause (i) above by reason of (a) being a
transferee or successor or by having been a member of a combined or consolidated group, or (b) by
contract or otherwise.

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     SECTION 4.2 Tax Indemnity Obligations of the KRG Blocker Stockholders.

     (a) KRG Tax Returns. ARDX Inc. and the KRG Blocker Stockholders agree and acknowledge
that as a result of Corporate Merger, KRG Blocker shall cease to exist and its tax year shall end
for federal and applicable state, local and foreign income tax purposes on the Closing Date. The
KRG Blocker Stockholders shall appoint a designee (the “KRG Designee”) to prepare and file
all Tax Returns of KRG Blocker with respect to any taxable year or period that ends on or before
the Closing Date and any taxable year or period beginning before and ending after the Closing Date,
which are due after the Closing Date. The KRG Designee shall prepare or cause to be prepared such
Tax Returns in accordance with the procedures, practices and accounting methods of KRG Blocker in
effect as of the date hereof. With respect to such Tax Returns, the KRG Designee shall provide
drafts of such Tax Returns to ARDX Inc. for its review and comment no later than thirty (30) days
prior to the due date for filing such Tax Returns, such comments to be delivered to the KRG
Designee within the next twenty (20) days. The KRG Designee shall make all such revisions and
otherwise implement all such comments provided by ARDX Inc. that the KRG Designee, in its sole
discretion and in good faith, deems reasonable. ARDX Inc. shall cooperate with the KRG Designee in
filing such Tax Returns, including causing the applicable entities to sign and file such Tax
Returns.

     (b) Tax Indemnity. The KRG Blocker Stockholders shall indemnify and hold harmless ARDX
Inc. from any and all liabilities, losses, damages, deficiencies, assessments, judgments and costs
or expenses (including out-of-pocket expenses for investigation and defense and reasonable
attorneys’ fees) actually incurred or sustained by ARDX Inc. with respect to or in connection with
Taxes imposed on ARDX Inc. as successor to KRG Blocker that are attributable to any taxable period
ending on or before the Closing Date and with respect to any taxable period that includes but does
not end on the Closing Date, the portion of such period that ends on and includes the Closing Date
(“Pre-Closing Tax Period”) (including as a result of the Corporate Merger, but excluding
Taxes attributable to events subsequent to the Corporate Merger Effective Time) of the KRG Blocker.

     (c) Cooperation on Tax Matters.

     (i) Unless otherwise required by law, ARDX Inc. shall not take any action which could
reasonably be expected to increase the liability of the KRG Blocker Stockholders for Taxes
attributable to any Pre-Closing Tax Period (including any action which could reasonably be
expected to increase the liability of the KRG Blocker Stockholders attributable to the
Corporate Merger) under this Agreement without the prior written consent of the KRG
Designee, which may be withheld by the KRG Designee in its sole discretion. ARDX Inc. shall
not amend, refile or otherwise modify any applicable portion of any Tax Return or Tax
election of KRG Blocker for any Pre-Closing Tax Period, or take any other action with
respect to such a Tax Return, that could reasonably be expected to increase the liability of
the KRG Blocker Stockholders for Taxes under this Agreement, without the prior written
consent of the KRG Designee, which consent may be withheld by the KRG Designee in its sole
discretion. Except as otherwise contemplated by this Agreement, ARDX Inc. shall not take any
action from and after the date of this Agreement but prior to the Corporate Merger Effective
Time that is outside the ordinary course of business.

     (ii) After the date of this Agreement, ARDX Inc. shall not, without the written consent
of the KRG Designee, agree to waive or extend the statute of limitations relating to any
Taxes of KRG Blocker for any Pre-Closing Tax Period.

     (iii) ARDX Inc. shall notify the KRG Designee in writing within ten (10) days upon
receipt by ARDX Inc. of notice of any pending or threatened federal, state, local or foreign
Tax

11

 

audits, assessments, or administrative or judicial proceedings affecting the Taxes or
Tax attributes of KRG Blocker that could result in any Tax liability for which the KRG
Blocker Stockholders may be liable to ARDX Inc. hereunder (a “KRG Tax Claim”). Such
notice shall contain factual information describing any asserted Tax liability and shall
include copies of any notice or other document received from any taxing authority in respect
of any such asserted Tax liability.

     (iv) ARDX Inc. and the KRG Designee shall cooperate fully, as and to the extent
reasonably requested by the other party, in connection with the filing of Tax Returns
pursuant to Section 4.2(a) and any audit, assessment, litigation or other proceeding
with respect to Taxes, and each shall (i) retain all books and records with respect to Tax
matters pertinent to KRG Blocker until the expiration of the statute of limitations
(including any extensions thereof) applicable to such taxable periods, and to abide by all
record retention agreements entered into with any taxing authority and (ii) to give to the
other party reasonable written notice prior to transferring, destroying or discarding any
such books and records and, if such other party so requests, the party will allow the other
party to take possession of such books and records.

     (d) Tax Contests. The KRG Designee shall, at its own expense, have the right to
control the contest of any KRG Tax Claim (a “KRG Tax Proceeding”) provided that (i) ARDX
Inc. may participate in the conduct of such KRG Tax Proceeding at its own expense, and (ii) the
settlement or other resolution of such KRG Tax Proceeding shall be subject to the written consent
of ARDX Inc., which consent shall not be unreasonably withheld, conditioned or delayed; provided,
however, that no such consent shall be required where such settlement provides for the payment by
the KRG Blocker, the KRG Blocker Stockholders, or the KRG Designee of money as the sole remedy and
includes as an unconditional term thereof the giving by the claimant of a release from all
liability with respect to such KRG Tax Claim.

     (e) Tax Refunds. Any refunds for Taxes (including any interest in respect thereof)
received by ARDX Inc., and any amounts credited against Taxes to which ARDX Inc. becomes entitled
(including by way of any amended Tax Return), that relate to Pre-Closing Tax Period of the KRG
Blocker, shall be property of the KRG Blocker Stockholders, except in each case to the extent such
refund or credit resulted from the carryback of a net operating loss or other Tax attribute that
was economically generated after the date of this Agreement. ARDX Inc. shall pay to the KRG
Designee any such refund or the amount of any such credit within fifteen (15) days after receipt or
entitlement thereto.

      SECTION 4.3 Tax Indemnity Obligations of the Summit Blocker Stockholders.

     (a) Summit Tax Returns. ARDX Inc. and the Summit Blocker Stockholders agree and
acknowledge that as a result of the Corporate Merger, the Summit Blockers shall cease to exist and
its tax year shall end for federal and applicable state, local and foreign income tax purposes on
the Closing Date. The Summit Blocker Stockholders shall appoint a designee (the “Summit
Designee”) to prepare and file all Tax Returns of the Summit Blockers with respect to any
taxable year or period that ends on or before the Closing Date and any taxable year or period
beginning before and ending after the Closing Date, which are due after the Closing Date. The
Summit Designee shall prepare or cause to be prepared such Tax Returns in accordance with the
procedures, practices and accounting methods of the Summit Blockers in effect as of the date
hereof. With respect to such Tax Returns, the Summit Designee shall provide drafts of such Tax
Returns to ARDX Inc. for its review and comment no later than thirty (30) days prior to the due
date for filing such Tax Returns, such comments to be delivered to the Summit Designee within the
next twenty (20) days. The Summit Designee shall make all such revisions and otherwise implement
all such comments provided by ARDX Inc. that the Summit Designee, in its sole discretion and in
good faith, deems reasonable. ARDX Inc. shall cooperate with the Summit Designee in filing such
Tax Returns, including causing the applicable entities to sign and file such Tax Returns.

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     (b) Tax Indemnity.

     (i) Summit Ventures VI-B, L.P. shall indemnify and hold harmless ARDX Inc. from any and
all liabilities, losses, damages, deficiencies, assessments, judgments and costs or expenses
(including out-of-pocket expenses for investigation and defense and reasonable attorneys’
fees) actually incurred or sustained by ARDX Inc. with respect to or in connection with
Taxes imposed on ARDX Inc. as successor to the Summit Blocker 1 that are attributable to any
Pre-Closing Tax Period (including as a result of the Corporate Merger, but excluding Taxes
attributable to events subsequent to the Corporate Merger Effective Time) of the Summit
Blocker 1.

     (ii) Summit Partners Private Equity Fund VII-B, L.P. shall indemnify and hold harmless
ARDX Inc. from any and all liabilities, losses, damages, deficiencies, assessments,
judgments and costs or expenses (including out-of-pocket expenses for investigation and
defense and reasonable attorneys’ fees) actually incurred or sustained by ARDX Inc. with
respect to or in connection with Taxes imposed on ARDX Inc. as successor to the Summit
Blocker 2 that are attributable to any Pre-Closing Tax Period (including as a result of the
Corporate Merger, but excluding Taxes attributable to events subsequent to the Corporate
Merger Effective Time) of the Summit Blocker 2.

     (c) Cooperation on Tax Matters.

     (i) Unless otherwise required by law, ARDX Inc. shall not take any action which could
reasonably be expected to increase the liability of the Summit Blocker Stockholders for
Taxes attributable to any Pre-Closing Tax Period (including any action which could
reasonably be expected to increase the liability of the Summit Blocker Stockholders
attributable to the Corporate Merger) under this Agreement without the prior written consent
of the Summit Designee, which may be withheld by the Summit Designee in its sole discretion.
ARDX Inc. shall not amend, refile or otherwise modify any applicable portion of any Tax
Return or Tax election of the Summit Blockers for any Pre-Closing Tax Period, or take any
other action with respect to such a Tax Return, that could reasonably be expected to
increase the liability of the Summit Blocker Stockholders for Taxes under this Agreement,
without the prior written consent of the Summit Designee, which consent may be withheld by
the Summit Designee in its sole discretion. Except as otherwise contemplated by this
Agreement, ARDX Inc. shall not take any action from and after the date of this Agreement but
prior to the Corporate Merger Effective Time that is outside the ordinary course of
business.

     (ii) After the date of this Agreement, ARDX Inc. shall not, without the written consent
of the Summit Designee, agree to waive or extend the statute of limitations relating to any
Taxes of the Summit Blockers for any Pre-Closing Tax Period.

     (iii) ARDX Inc. shall notify the Summit Designee in writing within ten (10) days upon
receipt by ARDX Inc. of notice of any pending or threatened federal, state, local or foreign
Tax audits, assessments, or administrative or judicial proceedings affecting the Taxes or
Tax attributes of the Summit Blockers that could result in any Tax liability for which the
Summit Blocker Stockholders may be liable to ARDX Inc. hereunder (a “Summit Tax
Claim”). Such notice shall contain factual information describing any asserted Tax
liability and shall include copies of any notice or other document received from any taxing
authority in respect of any such asserted Tax liability.

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     (iv) ARDX Inc. and the Summit Designee shall cooperate fully, as and to the extent
reasonably requested by the other party, in connection with the filing of Tax Returns
pursuant to Section 4.3(a) and any audit, assessment, litigation or other proceeding
with respect to Taxes, and each shall (i) retain all books and records with respect to Tax
matters pertinent to the Summit Blockers until the expiration of the statute of limitations
(including any extensions thereof) applicable to such taxable periods, and to abide by all
record retention agreements entered into with any taxing authority and (ii) to give to the
other party reasonable written notice prior to transferring, destroying or discarding any
such books and records and, if such other party so requests, the party will allow the other
party to take possession of such books and records.

     (d) Tax Contests. The Summit Designee shall, at its own expense, have the right to
control the contest of any Summit Tax Claim (a “Summit Tax Proceeding”) provided that (i)
ARDX Inc. may participate in the conduct of such Summit Tax Proceeding at its own expense, and (ii)
the settlement or other resolution of such Summit Tax Proceeding shall be subject to the written
consent of ARDX Inc., which consent shall not be unreasonably withheld, conditioned or delayed;
provided, however, that no such consent shall be required where such settlement provides for the
payment by the Summit Blockers, the Summit Blocker Stockholders, or the Summit Designee of money as
the sole remedy and includes as an unconditional term thereof the giving by the claimant of a
release from all liability with respect to such Summit Tax Claim.

     (e) Tax Refunds. Any refunds for Taxes (including any interest in respect thereof)
received by ARDX Inc., and any amounts credited against Taxes to which ARDX Inc. becomes entitled
(including by way of any amended Tax Return), that relate to any Pre-Closing Tax Period of the
Summit Blockers, shall be property of the Summit Blocker Stockholders, except in each case to the
extent such refund or credit resulted from the carryback of a net operating loss or other Tax
attribute that was economically generated after the date of this Agreement. ARDX Inc. shall pay to
the Summit Designee any such refund or the amount of any such credit within fifteen (15) days after
receipt or entitlement thereto.

     SECTION 4.4 Tax Allocation Provisions. In the case of any Tax Return for a
Pre-Closing Tax Period that does not end on the Closing Date (a “Straddle Period”), and for
purposes of determining hereunder the amount of Taxes attributable to a Pre-Closing Tax Period or
any taxable period (or portion thereof) that is not a Pre-Closing Tax Period generally, the amount
of Taxes attributable to the Pre-Closing Tax Period shall be deemed to be (i) in the case of Taxes
imposed on a periodic basis (such as certain franchise Taxes, real or personal property Taxes), the
amount of such Taxes for the entire period (or, in the case of such Taxes determined on an arrears
basis, the amount of such Taxes for the immediately preceding period) multiplied by a fraction, the
numerator of which is the number of calendar days in the Straddle Period ending on and including
the Closing Date and the denominator of which is the number of calendar days in the entire relevant
Straddle Period and (ii) in the case of Taxes not described in (i) above (such as Taxes that are
based upon or related to income or receipts, based upon occupancy or imposed in connection with any
sale or other transfer or assignment of property (real or personal, tangible or intangible)), the
amount of any such Taxes shall be determined as if such taxable period and the taxable period ended
of as of the close of business on the Closing Date.

14

 

     SECTION 4.5. Aurora LLC Partnership Tax Year. The parties agree that, for purposes of
federal income tax and applicable state income tax, the partnership tax year of Aurora LLC shall
end on the Closing Date. ARDX Inc. and the Aurora LLC Members agree to report the LLC Merger for
federal income tax, and applicable state income tax, as an assets-over transaction in accordance
with Rev. Rul. 84-111, 1984-2 C.B. 88, in which all income recognized by Aurora LLC as a result of
the LLC Merger shall be allocated to the Summit Non-Blocker Members and the Management Members, and
not to ARDX Inc. or the Corporate Merging Entities, unless otherwise required by law.

[SIGNATURES ON NEXT PAGE]

15

 

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement and Plan of Merger to be
duly executed as of the date first written above.

ARDX INC:

AURORA DIAGNOSTICS, INC.

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 
	 

	 	Title:	 	 

[Signature Page to Agreement and Plan of Merger]

 

 

SUMMIT BLOCKER 1:

SV VI-B AURORA BLOCKER CORP.

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 
	 

	 	Title:	 	 

SUMMIT BLOCKER 2:

SPPE VII-B AURORA BLOCKER CORP.

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 
	 

	 	Title:	 	 

SUMMIT BLOCKER STOCKHOLDERS:

SUMMIT VENTURES VI-B, L.P.

By: Summit Partners VI (GP), L.P.

Its: General Partner

By: Summit Partners VI (GP), LLC

Its: General Partner

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 
	 

	 	Title: Member	 	 

SUMMIT PARTNERS PRIVATE EQUITY FUND VII-B, L.P.

By: Summit Partners PE VII, L.P.

Its: General Partner

By: Summit Partners PE VII, LLC

Its: General Partner

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 
	 

	 	Title: Member	 	 

[Signature Page to Agreement and Plan of Merger]

 

 

KRG BLOCKER:

KRG AURORA BLOCKER, INC.

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 
	 

	 	Title:	 	 

KRG BLOCKER STOCKHOLDERS:

KRG CAPITAL FUND IV, L.P.

By: KRG Capital Management, L.P., with respect to its Class IV series

Its: General Partner

By: KRG Capital, LLC, with respect to its Class IV series

Its: General Partner

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name: Mark M. King	 	 
	 

	 	Title: Managing Director	 	 

KRG CAPITAL FUND IV-A, L.P.

By: KRG Capital Management, L.P., with respect to its Class IV series

Its: General Partner

By: KRG Capital, LLC, with respect to its Class IV series

Its: General Partner

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name: Mark M. King	 	 
	 

	 	Title: Managing Director	 	 

[Signature Page to Agreement and Plan of Merger]

 

 

KRG CAPITAL FUND IV, (PA) L.P.

By: KRG Capital Management, L.P., with respect to its Class IV series

Its: General Partner

By: KRG Capital, LLC, with respect to its Class IV series

Its: General Partner

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name: Mark M. King	 	 
	 

	 	Title: Managing Director	 	 

KRG CAPITAL FUND IV, (FF) L.P.

By: KRG Capital Management, L.P., with respect to its Class IV series

Its: General Partner

By: KRG Capital, LLC, with respect to its Class IV series

Its: General Partner

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name: Mark M. King	 	 
	 

	 	Title: Managing Director	 	 

KRG CO-INVESTMENT, L.L.C.

By: King Consulting Corporation

Its: Managing Member

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name: Mark M. King	 	 
	 

	 	Title: President	 	 

[Signature Page to Agreement and Plan of Merger]

 

 

AURORA LLC:

AURORA DIAGNOSTICS HOLDINGS, LLC

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 
	 

	 	Title:	 	 

AURORA LLC MEMBERS:

SV VI-B AURORA BLOCKER CORP.

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 
	 

	 	Title:	 	 

SPPE VII-B AURORA BLOCKER CORP.

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 
	 

	 	Title:	 	 

KRG AURORA BLOCKER, INC.

	 	 	 	 	 

	By:

	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 
	 

	 	Title:	 	 

[Signature Page to Agreement and Plan of Merger]

 

 

SUMMIT VENTURES VI-A, L.P.

By: Summit Partners VI (GP), L.P.

Its: General Partner

By: Summit Partners VI (GP), LLC

Its: General Partner

	 	 	 	 	 	 	 

	By:

	 	 	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 	 	 
	 

	 	 	 	 	 	 
	 

	 	Its:
	 	Member	 	 

SUMMIT VI ADVISORS FUND, L.P.

By: Summit Partners VI (GP), L.P.

Its: General Partner

By: Summit Partners VI (GP), LLC

Its: General Partner

	 	 	 	 	 	 	 

	By:

	 	 	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 	 	 
	 

	 	 	 	 	 	 
	 

	 	Its:
	 	Member	 	 

SUMMIT VI ENTREPRENEURS FUND, L.P.

By: Summit Partners VI (GP), L.P.

Its: General Partner

By: Summit Partners VI (GP), LLC

Its: General Partner

	 	 	 	 	 	 	 

	By:

	 	 	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 	 	 
	 

	 	 	 	 	 	 
	 

	 	Its:
	 	Member	 	 

[Signature Page to Agreement and Plan of Merger]

 

 

SUMMIT INVESTORS VI, L.P.

By: Summit Partners VI (GP), L.P.

Its: General Partner

By: Summit Partners VI (GP), LLC

Its: General Partner

	 	 	 	 	 	 	 

	By:

	 	 	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 	 	 
	 

	 	 	 	 	 	 
	 

	 	Its:
	 	Member	 	 

SUMMIT PARTNERS PRIVATE EQUITY FUND VII-A, L.P.,

By: Summit Partners PE VII, L.P.

Its: General Partner

By: Summit Partners PE VII, LLC

Its: General Partner

	 	 	 	 	 	 	 

	By:

	 	 	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 	 	 
	 

	 	 	 	 	 	 
	 

	 	Its:
	 	Member	 	 

SUMMIT PARTNERS VI (GP), L.P.

By: Summit Partners VI (GP), LLC

Its: General Partner

	 	 	 	 	 	 	 

	By:

	 	 	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 	 	 
	 

	 	 	 	 	 	 
	 

	 	Its:
	 	Member	 	 

SUMMIT PARTNERS PE VII, L.P.

By: Summit Partners PE VII, LLC

Its: General Partner

	 	 	 	 	 	 	 

	By:

	 	 	 	 	 	 
	 	 	 	 	 
	 

	 	Name:	 	 	 	 
	 

	 	 	 	 	 	 
	 

	 	Its:
	 	Member	 	 

[Signature Page to Agreement and Plan of Merger]

 

 

MANAGEMENT MEMBERS:

	 	 	 

	James C. New

	 	 
	 
	 	 
	 
	 	 
	 
	 	 
	Christopher Jahnle
	 	 
	 
	 	 
	 
	 	 
	 
	 	 
	Kirk A. Rebane
	 	 
	 
	 	 
	 
	 	 
	 
	 	 
	Martin J. Stefanelli
	 	 
	 
	 	 
	 
	 	 
	 
	 	 
	Fred Ferrara
	 	 
	 
	 	 
	 
	 	 
	 
	 	 
	Michael Null
	 	 
	 
	 	 
	 
	 	 
	 
	 	 
	Deanna Shackley
	 	 
	 
	 	 
	 
	 	 
	 
	 	 
	Michael Grattendick
	 	 
	 
	 	 
	 
	 	 
	 
	 	 
	Greg Marsh
	 	 
	 
	 	 
	 
	 	 

[Signature Page to Agreement and Plan of Merger]

 

 

Schedule 1.8(a)(ii)

Certain Rights to Other Securities

Aurora LLC

	 	1.	 	Aurora LLC directly owns 100% of the outstanding membership interests of Aurora
Diagnostics.

 

 

Schedule 1.8(a)(iii)

Capitalization

	 	1.	 	The following are the holders of the outstanding equity interests of each Merging
Entity:

	 	 	 
	Merging Entity	 	Stockholders/Members
	Summit Blocker 1

	 	Summit Ventures VI-B, L.P.
	 
	 	 
	Summit Blocker 2

	 	Summit Partners Private Equity Fund VII-B, L.P.
	 
	 	 
	KRG Blocker

	 	KRG Capital Fund IV, L.P.
	 

	 	KRG Capital Fund IV-A, L.P.
	 

	 	KRG Capital Fund IV (FF), L.P.
	 

	 	KRG Capital Fund IV (PA), L.P.
	 

	 	KRG Co-Investment, L.L.C.
	 
	 	 
	Aurora Diagnostics

	 	SV VI-B Aurora Blocker Corp.
	Holdings, LLC

	 	SPPE VII-B Aurora Blocker Corp.
	 

	 	KRG Aurora Blocker, Inc.
	 

	 	Summit Ventures VI, L.P.
	 

	 	Summit VI Advisors Fund, L.P.
	 

	 	Summit VI Entrepreneurs Fund, L.P.
	 

	 	Summit Investors VI, L.P.
	 

	 	Summit Partners Private Equity Fund VII-A, L.P.
	 

	 	Summit Partners VI (GP), L.P.
	 

	 	Summit Partners PE VII, L.P.
	 

	 	James C. New
	 

	 	Christopher Jahnle
	 

	 	Kirk A. Rebane
	 

	 	Martin J. Stefanelli
	 

	 	Fred Ferrara
	 

	 	Michael Null
	 

	 	Gregory Marsh
	 

	 	Michael Grattendick
	 

	 	Deanna Shackley

Aurora LLC

	 	2.	 	Amended and Restated Limited Liability Company Agreement, dated June 12, 2009, among
Aurora Diagnostics Holdings, LLC and the other parties named therein.

	 	3.	 	Amended and Restated Registration Rights Agreement, dated June 12, 2009, by and among
Aurora Diagnostics Holdings, LLC and each of the signatories thereto.

 

 

Schedule 1.8(a)(iv)

Certain Rights to Equity Interests

None.

 

 

Schedule 1.8(a)(v)

Certain Activities and Agreements

Summit Blocker 1 and Summit Blocker 2

Summit Blocker 1 and Summit Blocker 2 each were party to a limited partnership agreement, of which
each was the sole limited partner, for a partnership formed for the purpose of holding its indirect
investment in Aurora LLC. The assets of each such partnership were distributed out to the
partnership’s respective limited partner and general partner immediately prior to Summit Blocker 1
and Summit Blocker 2 entering into this Agreement.

Aurora LLC

Aurora LLC has previously entered into to the following agreements:

	 	1.	 	Purchase Agreement, dated March 7, 2008, by and among Aurora Diagnostics Holdings, LLC,
Aurora Diagnostics, LLC, TCD Holdings, Inc. and Valda Kaye, M.D.

	 	2.	 	Senior Management Agreement, dated June 2, 2006, by and among Aurora Diagnostics
Holdings, LLC and James C. New.

	 	3.	 	Senior Management Agreement, dated October 2006, by and among Aurora Diagnostics
Holdings, LLC, Aurora Diagnostics, LLC, James C. New and Martin J. Stefanelli.

	 	4.	 	Senior Management Agreement, dated November 5, 2007, by and among Aurora Diagnostics
Holdings, LLC, Aurora Diagnostics, LLC and Greg Marsh.

	 	5.	 	Letter Agreement, dated August 11, 2008, by and among Aurora Diagnostics Holdings, LLC,
Aurora Diagnostics, LLC and Greg Marsh.

	 	6.	 	Senior Management Agreement, dated October 2006, by and among Aurora Diagnostics
Holdings, LLC, Aurora Diagnostics, LLC, James C. New and Fred Ferrara.

	 	7.	 	Senior Management Agreement, dated April 2007, by and among Aurora Diagnostics
Holdings, LLC, Aurora Diagnostics, LLC, James C. New and Michael Null.

	 	8.	 	Master Promissory Note, dated November 17, 2006, by James C. New in favor of Aurora
Diagnostics Holdings, LLC.

	 	9.	 	Executive Unit Pledge Agreement, dated June 2, 2006, by and between James C. New and
Aurora Diagnostics Holdings, LLC.

	 	10.	 	Promissory Note, dated March 7, 2008, by James C. New in favor of Aurora Diagnostics
Holdings, LLC.

	 	11.	 	Pledge Agreement, dated March 7, 2008, by and between James C. New and Aurora
Diagnostics Holdings, LLC.

	 	12.	 	Master Promissory Note, dated November 17, 2006, by Martin J. Stefanelli in favor of
Aurora Diagnostics Holdings, LLC.

 

 

	 	13.	 	Executive Unit Pledge Agreement, dated October 2, 2006, by and between Martin J.
Stefanelli and Aurora Diagnostics Holdings, LLC.

	 	14.	 	Promissory Note, dated March 7, 2008, by Martin J. Stefanelli in favor of Aurora
Diagnostics Holdings, LLC.

	 	15.	 	Pledge Agreement, dated March 7, 2008, by and between Martin J. Stefanelli and Aurora
Diagnostics Holdings, LLC.

	 	16.	 	Master Promissory Note, dated November 17, 2006, by Fred Ferrara in favor of Aurora
Diagnostics Holdings, LLC.

	 	17.	 	Executive Unit Pledge Agreement, dated October 2, 2006, by and between Fred Ferrara and
Aurora Diagnostics Holdings, LLC.

	 	18.	 	Pledge Agreement, dated March 7, 2008, by and between Fred Ferrara and Aurora
Diagnostics Holdings, LLC.

	 	19.	 	Promissory Note, dated March 7, 2008, by Fred Ferrara in favor of Aurora Diagnostics
Holdings, LLC.

	 	20.	 	Master Promissory Note, dated April 23, 2007, by Michael Null in favor of Aurora
Diagnostics Holdings, LLC.

	 	21.	 	Executive Unit Pledge Agreement, dated April 23, 2007, by and between Michael Null and
Aurora Diagnostics Holdings, LLC.

	 	22.	 	Promissory Note, dated March 7, 2008, by Michael Null in favor of Aurora Diagnostics,
Holdings, LLC.

	 	23.	 	Pledge Agreement, dated March 7, 2008, by and between Michael Null and Aurora
Diagnostics Holdings, LLC.

	 	24.	 	Manager Indemnification Agreement, dated as of June 2, 2006, by and between Aurora
Diagnostics Holdings, LLC and James C. New.

	 	25.	 	Manager Indemnification Agreement, dated as of June 2, 2006, by and between Aurora
Diagnostics Holdings, LLC and Thomas S. Roberts.

	 	26.	 	Manager Indemnification Agreement, dated as of June 2, 2006, by and between Aurora
Diagnostics Holdings, LLC and Wesley W. Lang, Jr.

	 	27.	 	Manager Indemnification Agreement, dated as of June 2, 2006, by and between Aurora
Diagnostics Holdings, LLC and Peter J. Connolly.

	 	28.	 	Manager Indemnification Agreement, dated as of June 2, 2006, by and between Aurora
Diagnostics Holdings, LLC and Christopher J. Dean.

	 	29.	 	Manager Indemnification Agreement, dated as of June 12, 2009, by and between Aurora
Diagnostics Holdings, LLC and Mark M. King.

 

 

	 	30.	 	Manager Indemnification Agreement, dated as of June 12, 2009, by and between Aurora
Diagnostics Holdings, LLC and Christopher J. Bock.

	 	31.	 	Manager Indemnification Agreement, dated as of June 12, 2009, by and between Aurora
Diagnostics Holdings, LLC and Blain Tikker.

	 	32.	 	Management Rights Agreement, dated June 2, 2006, by and among Summit Ventures VI-A,
L.P., SV VI-B Aurora Holdings, L.P., Summit Ventures VI-B, L.P., Summit VI Advisors Fund,
L.P., Summit VI Entrepreneurs Fund, L.P., Summit Investors VI, L.P., Summit Partners
Private Equity Fund VII-A, L.P., SPPE VII-B Aurora Holdings, L.P., Summit Partners Private
Equity Fund VII-B, L.P. and Aurora Diagnostics Holdings, LLC.

	 	33.	 	Management Rights Agreement, dated June 12, 2009, by and among KRG Capital Partners,
L.L.C., KRG Aurora Blocker, Inc. and Aurora Diagnostics Holdings, LLC.

	 	34.	 	Management Rights Agreement, dated June 2, 2006, by and among GSO Special Situations
Fund LP and GSO Sumnostics Holdings (US), Inc., and Aurora Diagnostics Holdings, LLC.

	 	35.	 	Registration Agreement, dated June 2, 2006, by and among Aurora Diagnostics Holdings,
LLC, Summit Ventures VI-A, L.P., SV VI-B Aurora Holdings, L.P., Summit VI Advisors Fund,
L.P., Summit VI Entrepreneurs Fund, L.P., Summit Investors VI, L.P., Summit Partners
Private Equity Fund VII-A, L.P., SPPE VII-B Aurora Holdings, L.P., GSO Special Situations
Fund LP and GSO Sumnostics Holdings (US), Inc., James C. New and other executive employees
named from time to time, and Christopher Jahnle, Kirk A. Rebane, and other equityholders
named from time to time, as amended and restated on June 12, 2009, by and among Aurora
Diagnostics Holdings, LLC and each of the signatories thereto.

	 	36.	 	Consulting Agreement, dated June 2, 2006, by and between Aurora Diagnostics, LLC,
Aurora Diagnostics Holdings, LLC and Haverford, Capital Advisors, Inc.

	 	37.	 	Equity Incentive Plan of Aurora Diagnostics Holdings, LLC.

	 	38.	 	Engagement Letter, dated March 20, 2009, by and between Wachovia Capital Markets, LLC
and Aurora Diagnostics Holdings, LLC, as amended by that certain amendment thereto, dated
June 10, 2009.

	 	39.	 	Agreement, dated as of June 10, 2009, by and among Wachovia Capital Markets, LLC,
Aurora Diagnostics Holdings, LLC and Lazard Middle Market LLC.

	 	40.	 	Release Letter, dated June 10, 2009, from Wachovia Capital Markets, LLC to Aurora
Diagnostics Holdings, LLC.

	 	41.	 	Release Letter, dated June 10, 2009, from Lazard Middle Market LLC to Aurora
Diagnostics Holdings, LLC.

	 	42.	 	Contribution and Termination Agreement, dated as of June 12, 2009, by and among Aurora
Diagnostics Holdings, LLC, Aurora Diagnostics, LLC, GSO Capital Partners LP, GSO Special
Situations Fund LP, GSO Special Situations Overseas Master Fund Ltd. and GSO Credit
Opportunities Fund (Helios), L.P.

 

 

	 	43.	 	Escrow Agreement, dated June 12, 2009, by and among GSO Capital Partners LP, GSO
Special Situations Fund LP, GSO Special Situations Overseas Master Fund Ltd., GSO Credit
Opportunities Fund (Helios), L.P., Aurora Diagnostics Holdings, LLC and Regions Bank.

	 	44.	 	Credit Agreement, dated June 2, 2006, among Aurora Diagnostics, LLC, Aurora Diagnostics
Holdings, LLC and certain subsidiaries of Aurora Diagnostics, LLC, as Guarantors, GSO
Capital Partners LP as Collateral Agent and Administrative Agent, and the lenders party
thereto from time to time.

	 	45.	 	Security Agreement, dated November 17, 2006, among Aurora Diagnostics, LLC, Aurora
Diagnostics Holdings, LLC and certain subsidiaries of Aurora Diagnostics, LLC, as
Guarantors, and GSO Capital Partners LP as Collateral Agent.

	 	46.	 	First Lien Credit and Guaranty Agreement dated as of December 10, 2007, among Aurora
Diagnostics, LLC and certain subsidiaries of Aurora Diagnostics, LLC, as Borrowers, Aurora
Diagnostics Holdings, LLC and certain subsidiaries of Aurora Diagnostics Holdings, LLC, as
Guarantors, the lenders executing the signature pages attached thereto and the
Administrative Agent, Collateral Agent, Lead Arranger, Syndication Agent and Documentation
Agent, each as defined therein, and all amendments thereto.

	 	47.	 	Second Lien Credit and Guaranty Agreement dated as of December 10, 2007, among Aurora
Diagnostics, LLC and certain subsidiaries of Aurora Diagnostics, LLC, as Borrowers, Aurora
Diagnostics Holdings, LLC and certain subsidiaries of Aurora Diagnostics Holdings, LLC, as
Guarantors, the lenders executing the signature pages attached thereto and the
Administrative Agent, Collateral Agent, Lead Arranger, Syndication Agent and Documentation
Agent, each as defined therein, and all amendments thereto.

	 	48.	 	Credit and Guaranty Agreement, dated May 26, 2010, by and among Aurora Diagnostics LLC
as Borrower, Aurora Diagnostics Holdings, LLC and certain subsidiaries and affiliates of
Aurora Diagnostics, LLC as Guarantors, the various lenders party thereto, Barclays Bank PLC
as Administrative Agent and Collateral Agent, Barclays Capital, Morgan Stanley Senior
Funding, Inc. and UBS Securities LLC as Joint Lead Arrangers and Joint Bookrunners, Morgan
Stanley Senior Funding, Inc. as Syndication Agent and UBS Securities LLC as Documentation
Agent.

	 	49.	 	Pledge and Security Agreement, dated May 26, 2010, among Aurora Diagnostics, LLC,
Aurora Diagnostics Holdings, LLC and certain subsidiaries of Aurora Diagnostics, LLC, as
Guarantors, and Barclays Bank PLC as Collateral Agent.

 

 

EXHIBIT A

CERTIFICATE OF MERGER

OF

SV VI-B AURORA BLOCKER CORP.,

(a Delaware corporation),

SPPE VII-B AURORA BLOCKER CORP.,

(a Delaware corporation)

AND

KRG AURORA BLOCKER, INC.

(a Delaware corporation)

INTO

AURORA DIAGNOSTICS, INC.

(a Delaware corporation)

     Pursuant to the provisions of Section 251 of the Delaware General Corporation Law (the
“DGCL”), the undersigned DO HEREBY CERTIFY THAT:

	 	1.	 	The name and jurisdiction of incorporation of the entities that are to merge (the
“Constituent Entities”) are SV VI-B Aurora Blocker Corp., a Delaware corporation
(“Summit Blocker 1”), SPPE VII-B Aurora Blocker Corp., a Delaware corporation
(“Summit Blocker 2”), KRG Aurora Blocker, Inc., a Delaware corporation (“KRG
Blocker” and, together with Summit Blocker 1 and Summit Blocker 2, the
“Blockers”) and Aurora Diagnostics, Inc., a Delaware corporation (“ARDX
Inc.”).

	 	2.	 	An Agreement and Plan of Merger (the “Merger Agreement”) has been approved,
adopted, certified, executed and acknowledged by each of the Constituent Entities in
accordance with Section 251 of the DGCL.

	 	3.	 	The name of the surviving entity is “Aurora Diagnostics, Inc.” (the “Surviving
Entity”).

	 	4.	 	The certificate of incorporation of ARDX Inc. as in effect immediately preceding the
filing of this certificate of merger shall continue as the certificate of incorporation of
the Surviving Entity until it is amended in accordance with its terms and the terms of the
DGCL.

	 	5.	 	The executed Merger Agreement is on file at the principal place of business of the
Surviving Entity, the address of which is [•].

	 	6.	 	The merger of the Blockers and ARDX Inc. shall be effective as of [•] local time on
[•].

	 	7.	 	A copy of the Merger Agreement will be furnished by the Surviving Entity, on request
and without cost, to any stockholder of any Constituent Entity.

[SIGNATURES ON NEXT PAGE]

 

 

     IN WITNESS WHEREOF, this certificate has been executed as of this [•] day of [•], [•] by the
undersigned.

	 	 	 	 	 	 	 	 
	AURORA DIAGNOSTICS, INC. 

 	 	SV VI-B AURORA BLOCKER CORP.

 	 
	By:  	 	 	By:  	 	 
	 	Name:  	 	 	 	Name:  	 	 
	 	Title:  	 	 	 	Title:  	 	 
	
 
	 	SPPE VII-B AURORA BLOCKER CORP.

 	 
	 	By:  	
 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 
	
 
	 	KRG AURORA BLOCKER, INC.

 	 
	 	By:  	
 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 

 

 

	 	 	 	 	 

EXHIBIT B

CERTIFICATE OF MERGER

OF

AURORA DIAGNOSTICS HOLDINGS, LLC

(a Delaware limited liability company)

INTO

AURORA DIAGNOSTICS, INC.

(a Delaware corporation)

     Pursuant to the provisions of Section 251 of the Delaware General Corporation Law (the
“DGCL”) and 209 of the Delaware Limited Liability Company Act (the “LLC Act”), the
undersigned DO HEREBY CERTIFY THAT:

	 	8.	 	The name and jurisdiction of formation or organization of the entities that are to
merge (the “Constituent Entities”) Aurora Diagnostics Holdings, LLC, a Delaware
limited liability company (“Aurora LLC”) and Aurora Diagnostics, Inc., a Delaware
corporation (“ARDX Inc.”).

	 	9.	 	An Agreement and Plan of Merger (the “Merger Agreement”) has been approved,
adopted, certified, executed and acknowledged by each of the Constituent Entities in
accordance with Section 251 of the DGCL and Section 209 of the LLC Act.

	 	10.	 	The name of the surviving entity is “Aurora Diagnostics, Inc.” (the “Surviving
Entity”).

	 	11.	 	The certificate of incorporation of ARDX Inc. as in effect immediately preceding the
filing of this certificate of merger shall continue as the certificate of incorporation of
the Surviving Entity until it is amended in accordance with its terms and the terms of the
DGCL and the LLC Act.

	 	12.	 	The executed Merger Agreement is on file at the principal place of business of the
Surviving Entity, the address of which is [•].

	 	13.	 	The merger of the Aurora LLC and ARDX Inc. shall be effective as of [•] local time on
[•].

	 	14.	 	A copy of the Merger Agreement will be furnished by the Surviving Entity, on request
and without cost, to any stockholder of any Constituent Entity.

[SIGNATURES ON NEXT PAGE]

 

 

     IN WITNESS WHEREOF, this certificate has been executed as of this [•] day of [•], [•] by the
undersigned.

	 	 	 	 	 	 	 	 
	AURORA DIAGNOSTICS, INC. 

 	 	AURORA DIAGNOSTICS HOLDINGS, LLC

 	 
	By:  	 	 	By:  	 	 
	 	Name:  	 	 	 	Name:  	 	 
	 	Title:  	 	 	 	Title:  	 	 

 

 

EXHIBIT C

TAX RECEIVABLE AGREEMENT

	*	 	The Tax Receivable Agreement is filed as a separate exhibit to the registration statement of Aurora Diagnostics Inc.

- 35 -

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