Fifth amendment to credit agreement

This FIFTH AMENDMENT TO CREDIT AGREEMENT (this “Amendment”), dated as of January 27, 2021, by and among Surgery Center Holdings, Inc., a Delaware corporation (the “Borrower”), SP Holdco I, Inc., a Delaware corporation (“Holdings”), the other Guarantors party hereto, each 2021 New Revolving Lender (as defined below) party hereto, Jefferies Finance LLC, as administrative agent for the Lenders (in such capacity, the “Administrative Agent”) and as collateral agent for the Secured Parties (in such capacity, the “Collateral Agent” or, as Administrative Agent or Collateral Agent, “Agent”), Jefferies Finance LLC, as an Issuing Bank, and KKR Corporate Lending LLC, as an Issuing Bank.

WHEREAS, the Borrower, Holdings, Guarantors, Lenders and Agent, among others, are parties to that certain Credit Agreement, dated as of August 31, 2017, as amended pursuant to that certain Incremental Term Loan Amendment, dated as of October 23, 2018, among the Borrower, Holdings, the other Guarantors party thereto, the Agent and the Lenders party thereto, that certain Incremental Revolving Loan Amendment, dated as of March 25, 2019, among the Borrower, Holdings, the other Guarantors party thereto, the Agent and the Lenders party thereto, that certain Third Amendment to Credit Agreement, dated as of April 16, 2020, among the Borrower, Holdings, the Agent and the Lenders party thereto, that certain Second Incremental Term Loan Amendment, dated as of April 22, 2020, among the Borrower, Holdings, the other Guarantors party thereto, the Agent and the Lenders party thereto, and as the same may be further amended, restated, amended and restated, supplemented or otherwise modified from time to time prior to the date hereof (the “Credit Agreement”; the Credit Agreement, as amended pursuant to this Amendment, the “Amended Credit Agreement”);

WHEREAS, pursuant to the Credit Agreement, the Revolving Lenders (the “Existing Revolving Lenders”) thereunder previously provided Revolving Commitments (the “Existing Revolving Commitments” and the Revolving Loans made thereunder, the “Existing Revolving Loans”) to the Borrower;

WHEREAS, pursuant to, and in accordance with, Section 2.21(b) of the Credit Agreement, (i) the Borrower has made a Revolving Extension Offer to each Existing Revolving Lender in an amount equal to such Existing Revolving Lender’s Existing Revolving Commitments, (ii) each Existing Revolving Lender as of the Effective Date (as defined below) (collectively, the “Extending Revolving Lenders”), whose name is set forth on Schedule 2.01 hereto under the heading “Extending Revolving Lender”, has accepted the Revolving Extension Offer and hereby agrees to provide an Extended Revolving Commitment in an aggregate principal amount equal to its Existing Revolving Commitment as of the Effective Date (which, for the avoidance of doubt, is set forth on Schedule 2.01 hereto) (the “2021 Extended Revolving Commitments” and the loans made pursuant thereto, “2021 Extended Revolving Loans”), effective as of the Extension Effective Time, which 2021 Extended Revolving Commitments shall have the terms set forth herein and in the Amended Credit Agreement and (iii) each Extending Revolving Lender and the Administrative Agent have agreed, upon the terms and subject to the conditions set forth herein, that each Extending Revolving Lender will provide its respective 2021 Extended Revolving Commitments to the Borrower at the Extension Effective Time;

WHEREAS, (i) the Borrower has requested that each Lender party hereto (the “2021 Incremental Revolving Lenders” and, together with the Extending Revolving Lenders, the “2021 New Revolving

Lenders”) whose name is set forth on Schedule 2.01 hereto under the heading “2021 Incremental Revolving Lender” provide a Revolving Commitment Increase, to become effective immediately after the Extension Effective Time on the date of the Extension Effective Time (the “Extension Effective Date”), under Section 2.19 of the Credit Agreement to the 2021 Extended Revolving Commitments in an aggregate principal amount equal to the amount set forth opposite such 2021 Incremental Revolving Lender’s name on Schedule 2.01 hereto under the heading “2021 Incremental Revolving Commitment” (the “2021 Incremental Revolving Commitments” and, together with the 2021 Extended Revolving Commitments, the “2021 New Revolving Commitments”), effective as of the Fourth Incremental Amendment Time (as defined below), which 2021 Incremental Revolving Commitments shall have the terms set forth herein and in the Amended Credit Agreement and (ii) each 2021 Incremental Revolving Lender and the Administrative Agent have agreed, upon the terms and subject to the conditions set forth herein, that each 2021 Incremental Revolving Lender will provide its respective 2021 Incremental Revolving Commitments to the Borrower as of the Fourth Incremental Amendment Time;

WHEREAS, (a) Section 2 of this Amendment constitutes an Extension Amendment under and as defined in Section 2.21 of the Credit Agreement and (b) Section 3 of this Amendment constitutes an Incremental Amendment under and as defined in Section 2.19 of the Credit Agreement; and

WHEREAS, Agent and the 2021 New Revolving Lenders are willing, on the terms and subject to the conditions set forth below, to enter into the extensions, increases, amendments, modifications and agreements set forth in this Amendment.

NOW, THEREFORE, in consideration of the premises and the mutual agreements herein contained and other good and valuable consideration, the sufficiency and receipt of which are hereby acknowledged, the parties hereto, intending to be legally bound hereby, agree as follows:

1.Defined Terms. Unless otherwise defined herein, capitalized terms used herein shall have the respective meanings ascribed thereto in the Amended Credit Agreement.

2.Extension Amendment. Subject to the satisfaction of the conditions precedent set forth in Section 6 below, the Borrower, the Guarantors, each of the Extending Revolving Lenders and Agent hereby agree as follows:

(a)Each Extending Revolving Lender agrees, severally and not jointly, to provide to the Borrower its 2021 Extended Revolving Commitments as “Extended Revolving Commitments” under and as defined in the Amended Credit Agreement, commencing as of the Extension Effective Time in an amount equal to such Extending Revolving Lender’s 2021 Extended Revolving Commitments as set forth on Schedule 2.01 hereto, and to make 2021 Extended Revolving Loans to the Borrower under the Amended Credit Agreement, in each case, from time to time, on any Business Day during the period from the Extension Effective Time until the earlier of the Revolving Maturity Date and the termination of the 2021 Extended Revolving Commitments of such Extending Revolving Lender in accordance with the terms of the Amended Credit Agreement, in an aggregate principal amount not to exceed at any time outstanding the amount of such Extending Revolving Lender’s 2021 Extended Revolving Commitments. The 2021 Extended Revolving Commitments shall constitute “Revolving Commitments” for all purposes under the Amended Credit Agreement, and the 2021 Extended Revolving Loans shall constitute “Revolving Loans” for all purposes under the Amended Credit Agreement. For the avoidance of doubt, immediately following the effectiveness of the 2021

Extended Revolving Commitments at the Extension Effective Time, the Existing Revolving Commitments of each Extending Revolving Lender shall automatically be terminated in full.

(b)Each Extending Revolving Lender hereby severally agrees that its Existing Revolving Loans shall be converted into 2021 Extended Revolving Loans (the “Converted Revolving Loans”) at the Extension Effective Time, and each such Converted Revolving Loan shall be deemed to have been extended as a 2021 Extended Revolving Loan at the Extension Effective Time. All Converted Revolving Loans shall constitute the same Revolving Borrowing.

(c)Each Letter of Credit issued under the Credit Agreement and the Existing Revolving Commitments as of immediately prior to the Extension Effective Time shall be deemed to be issued under the Amended Credit Agreement and the 2021 Extended Revolving Commitments upon the Extension Effective Time, and the LC Exposure of each Extending Revolving Lender shall be based on such Extending Revolving Lender’s Pro Rata Share of the aggregate LC Exposure (after giving effect to the Extension Effective Time).

(d)Subject to satisfaction of the Extension Conditions, the definition of “Revolving Maturity Date” as set forth in Section 1.01 of the Credit Agreement is hereby amended and restated as follows:

“Revolving Maturity Date” shall mean (i) with respect to the Revolving Commitments and the Revolving Loans, February 1, 2026 (the “Extended Revolving Maturity Date”); provided that the Revolving Maturity Date with respect to the Revolving Commitments and Revolving Loans shall be August 31, 2024 if, on or prior to August 31, 2024, the Term Loans with a maturity date earlier than the Extended Revolving Maturity Date have not either been (x) repaid in full, (y) replaced or refinanced with Indebtedness permitted hereunder (including, without limitation, pursuant to Section 2.20 or 2.21 of this Agreement) having a maturity date not earlier than the Extended Revolving Maturity Date or (z) otherwise amended or modified to have a maturity date not earlier than the Extended Revolving Maturity Date, (ii) with respect to any tranche of Extended Revolving Loans or Extended Revolving Commitments (in each case, other than the 2021 Extended Revolving Commitments (as defined in the Fifth Amendment) and the 2021 Extended Revolving Loans (as defined in the Fifth Amendment)), the final maturity date as specified in the applicable Extension Amendment and (iii) with respect to any tranche of Other Revolving Loans or Other Revolving Commitments, the final maturity date as specified in the applicable Refinancing Amendment; provided that, if any such day is not a Business Day, the applicable Revolving Maturity Date shall be the Business Day immediately succeeding such day.

(e)Subject to satisfaction of the Extension Conditions, Section 1.01 of the Credit Agreement is hereby amended by adding the following defined term in correct alphabetical order:

“Fifth Amendment” shall mean the Fifth Amendment to Credit Agreement, dated as of January 27, 2021, by and among the Borrower, the Guarantors, the 2021 New Revolving Lenders (as defined therein) and the Administrative Agent, the Collateral Agent and the Issuing Banks.

(f)The obligations of each Extending Revolving Lender to provide the 2021 Extended Revolving Commitments to the Borrower pursuant to this Section 2 shall not become

effective until the date on which each of the following conditions (the “Extension Conditions”) in this Section 2(f) is first satisfied (the time of such satisfaction being the “Extension Effective Time”) (provided that the Extension Effective Time shall not be deemed to occur, and no Extending Revolving Lender shall be obligated or deemed to provide the 2021 Extended Revolving Commitments, if the Extension Conditions are not satisfied on or prior to the date that is 30 calendar days after the date hereof):

(i)the Administrative Agent shall have received a certificate executed by a Responsible Officer of the Borrower, certifying that, as of the Extension Effective Date, after giving effect to both the 2021 Extended Revolving Commitments and the 2021 Incremental Revolving Commitments contemplated hereby, (x) each of the representations and warranties made by the Loan Parties set forth in this Amendment, in Article 5 of the Credit Agreement and in all other Loan Documents are true and correct in all material respects on and as of the Extension Effective Date with the same effect as though made on and as of the Extension Effective Date, except to the extent such representations and warranties expressly relate to an earlier date, in which case such representations and warranties are true and correct in all material respects as of such earlier date; provided, that any such representation and warranty that is qualified by “materiality,” “material adverse effect” or similar language is true and correct in all respects (after giving effect to any such qualification therein) on and as of such earlier date with the same effect as though made on and as of the Extension Effective Date or such earlier date, as applicable, and (y) no Default or Event of Default exists or would result from the incurrence of the 2021 Extended Revolving Commitments and/or the 2021 Incremental Revolving Commitments contemplated by this Amendment;

(ii)Holdings and the Borrower shall have paid on or prior to the Extension Effective Time to the Administrative Agent and the 2021 New Revolving Lenders, as applicable, all expenses payable to them in connection with this Amendment (whether incurred before or after the Effective Date), in each case, to the extent invoiced at least two Business Days prior to the Extension Effective Time (except as otherwise reasonably agreed by the Borrower);

(iii)the Administrative Agent shall have received, on behalf of itself, the Collateral Agent and the 2021 New Revolving Lenders, an opinion of (x) Ropes & Gray LLP, counsel for the Loan Parties and (y) each local counsel for the Loan Parties listed on Schedule 4.02(d) to this Amendment (or other local counsel reasonably acceptable to the Administrative Agent), in each case, with respect to the Amendment and dated on or after the Effective Date and on or prior to the Extension Effective Time and addressed to the Administrative Agent, the Collateral Agent and the 2021 New Revolving Lenders and in customary form and substance (it being understood that, without limitation, any such opinions in form and substance consistent with the corresponding opinions provided in connection with the Second Incremental Amendment shall be deemed to be in customary form and substance);

(iv)the Administrative Agent shall have received (x) a certificate as to the good standing of each Loan Party as of a recent date, (y) a certificate of a Responsible Officer of each Loan Party dated on the Extension Effective Date certifying (A) that

attached thereto is a copy of the certificate or articles of incorporation or organization or certificate of formation, including all amendments thereto, of each Loan Party, certified as of a recent date by the Secretary of State of the state of its organization, or, in the alternative, certifying that such certificate or articles of incorporation or organization or certificate of formation has not been amended since delivery thereof to the Administrative Agent on the Closing Date, the First Incremental Amendment Date, the Second Incremental Amendment Date or the Third Incremental Amendment Date, as applicable, (B) that attached thereto is a true and complete copy of the by-laws or operating (or limited liability company) agreement of such Loan Party as in effect on the Extension Effective Time (or that the by-laws or operating (or limited liability company) agreement of such Loan Party has not been amended or otherwise modified since the delivery of such documents to the Administrative Agent on the Closing Date, the First Incremental Amendment Date, the Second Incremental Amendment Date or the Third Incremental Amendment Date, as applicable), (C) that attached thereto is a true and complete copy of resolutions duly adopted by the board of directors (or equivalent governing body) of such Loan Party authorizing or ratifying the execution, delivery and performance of the Amendment and, in the case of the Borrower, the borrowings and/or incurrence of the 2021 New Revolving Commitments and the Revolving Loans contemplated thereby, and that such resolutions have not been modified, rescinded or amended and are in full force and effect and (D) as to the incumbency and specimen signature of each officer executing any Loan Document or any other document delivered in connection herewith on behalf of such Loan Party and (z) a certificate of another officer as to the incumbency and specimen signature of the Secretary or Assistant Secretary executing the certificate pursuant to clause (y) above, in each case under this clause (iv), unless otherwise agreed by the Administrative Agent;

(v)the Administrative Agent shall have received Notes executed by the Borrower in favor of each 2021 New Revolving Lender that has requested a Note at least three Business Days in advance of the Extension Effective Time;

(vi)the Administrative Agent shall have received a solvency certificate, substantially in the form set forth in Exhibit H to the Credit Agreement, from the chief financial officer, chief operating officer or other officer with similar responsibilities of the Borrower, dated as of the Extension Effective Date and giving effect to the 2021 New Revolving Commitments and any Revolving Loans made pursuant to the 2021 New Revolving Commitments as of the Extension Effective Date;

(vii)the Administrative Agent shall have received all documentation and other information about the Borrower and the Guarantors required under applicable “know your customer” and anti-money laundering rules and regulations, including the USA PATRIOT Act, that has been reasonably requested in writing at least three days prior to the Extension Effective Time;

(viii)Parent shall have issued common stock pursuant to that certain Underwriting Agreement, dated as of the date hereof (the “Specified Equity Offering

Underwriting Agreement”), among Parent, J.P. Morgan Securities LLC and Jefferies LLC (without giving effect to any over-allotment option thereunder) (the “Specified Equity Offering”) (it being understood that the net cash proceeds of such Specified Equity Offering pursuant to the Specified Equity Offering Underwriting Agreement shall have been contributed to the Borrower); and

(ix)any LC Participation Fees, any interest with respect to any Existing Revolving Loans, and any Commitment Fees with respect to any Existing Revolving Commitments, in each case, that have accrued and are owing to the Existing Revolving Lenders (in each case, even if not yet due and payable at such time) as of the calendar day prior to the Extension Effective Time shall have been paid to the Administrative Agent on behalf of the Existing Revolving Lenders;

provided that, without limitation, the Extension Effective Time shall be deemed to be the date that the certificate set forth in clause (i) above is delivered to the Administrative Agent if as of the date such certificate is delivered each of the Extension Conditions (other than clause (i) above) has been satisfied.

(g)This Amendment shall constitute a Revolving Extension Offer to all Lenders holding Existing Revolving Commitments (as of immediately prior to this Amendment) pursuant to Section 2.21(b) of the Credit Agreement, and, for the avoidance of doubt, shall satisfy all such notice and offer requirements set forth in Section 2.21(b) and 2.21(e) of the Credit Agreement.

3.Incremental Revolving Commitments. Subject to the satisfaction of the conditions precedent set forth in Section 6 below, the Borrower, the Guarantors, the 2021 Incremental Revolving Lenders and Agent hereby agree as follows:

(a)The Borrower is requesting 2021 Incremental Revolving Commitments in the aggregate principal amount of $50,000,000 from the 2021 Incremental Revolving Lenders pursuant to, and on the terms set forth in, Section 2.19 of the Credit Agreement, effective as of the Fourth Incremental Amendment Time. The full principal amount of such 2021 Incremental Revolving Commitments are being incurred in reliance on clause (i)(y)(A) of the first proviso of Section 2.19(a) under the Credit Agreement.

(b)Each 2021 Incremental Revolving Lender agrees, severally and not jointly, to provide to the Borrower its 2021 Incremental Revolving Commitments as a Revolving Commitment Increase under the Amended Credit Agreement commencing as of the Fourth Incremental Amendment Time in an amount equal to such 2021 Incremental Revolving Lender’s 2021 Incremental Revolving Commitments as set forth on Schedule 2.01 hereto, and to make Revolving Loans to the Borrower under the Amended Credit Agreement, in each case, at any time and from time to time on and after the Fourth Incremental Amendment Time until the earlier of the Revolving Maturity Date and the termination of the Revolving Commitment of such 2021 Incremental Revolving Lender in accordance with the terms of the Amended Credit Agreement, in an aggregate principal amount at any time outstanding not to exceed such 2021 Incremental Revolving Lender’s 2021 Incremental Revolving Commitment. With effect from and after the Fourth Incremental Amendment Time, after giving effect to the Revolving Commitment Increase pursuant to the 2021 Incremental Revolving Commitments, (x) each Extending Revolving Lender that has Revolving Exposure under the 2021 Extended Revolving Commitments with respect to

2021 Extended Revolving Loans that are outstanding under its 2021 Extended Revolving Commitments as of the Fourth Incremental Amendment Time, shall assign to each 2021 Incremental Revolving Lender, and each 2021 Incremental Revolving Lender shall purchase from such Extending Revolving Lender, at the principal amount thereof, such interests in the 2021 Extended Revolving Loans outstanding as of the Fourth Incremental Amendment Time as shall be necessary in order that, after giving effect to all such assignments and purchases under this clause (x), and taking into account all Credit Extensions of Revolving Loans made as of the Fourth Incremental Amendment Time, such 2021 Extended Revolving Loans will be held by Extending Revolving Lenders and 2021 Incremental Revolving Lenders having a 2021 Incremental Revolving Commitment ratably in accordance with their Revolving Commitments after giving effect to the Revolving Commitment Increase pursuant to the 2021 Incremental Revolving Commitments and (y) the LC Exposure of each Revolving Lender shall be based on such Revolving Lender’s Pro Rata Share (determined after giving effect to the Revolving Commitment Increase pursuant to the 2021 Incremental Revolving Commitments) of the aggregate LC Exposure. The Administrative Agent and each Issuing Bank hereby consents to each 2021 Incremental Revolving Lender to the extent required pursuant to Section 2.19 and/or Section 10.04 under the Credit Agreement.

(c)The obligations of each 2021 Incremental Revolving Lender to provide the 2021 Incremental Revolving Commitments to the Borrower pursuant to this Section 3 shall become effective on the Extension Effective Date immediately after the Extension Effective Time occurs (the “Fourth Incremental Amendment Condition” and the time of such satisfaction being the “Fourth Incremental Amendment Time”); provided that, without limitation, the Fourth Incremental Amendment Time shall be deemed to be the date that the certificate set forth in Section 2(f)(i) above is delivered to the Administrative Agent if as of the date such certificate is delivered each of the conditions set forth in Section 2(f) above (other than Section 2(f)(i) above) has been satisfied.

(d)Subject to satisfaction of the Fourth Incremental Amendment Condition, the Revolving Commitments of the Extending Revolving Lenders and the 2021 Incremental Revolving Commitments shall be deemed to be, and treated as, part of a single Class of Revolving Commitments (and any Revolving Loans made pursuant to the 2021 Extended Revolving Commitments and the 2021 Incremental Revolving Commitments shall be deemed to be, and treated as, part of a single Class of Revolving Loans).

(e)Subject to satisfaction of the Fourth Incremental Amendment Condition, the definition of “Revolving Commitment” under Section 1.01 of the Credit Agreement (as amended pursuant to the Extension Amendment set forth in Section 2 above) is hereby amended and restated as follows:

“Revolving Commitment” shall mean, with respect to each Lender, the commitment, if any, of such Lender to make Revolving Loans hereunder up to the amount set forth on Schedule 2.01 under the caption “Revolving Loan Commitment” or in the Assignment and Acceptance or Refinancing Amendment pursuant to which such Lender assumed its Revolving Commitment, as applicable, as the same may be (a) reduced from time to time pursuant to Section 2.09 and (b) reduced or increased from time to time pursuant to (i) assignments by or to such Lender pursuant to an Assignment and Acceptance, (ii) a Refinancing Amendment, (iii) an Extension Amendment or (iv) an Incremental Amendment. The aggregate principal amount of the Lenders’ Revolving Commitments

(x) immediately prior to the Fourth Incremental Amendment Time was $120,000,000 and (y) as of the Fourth Incremental Amendment Time was $170,000,000 (immediately after giving effect to the 2021 Incremental Revolving Commitments).

(f)Subject to satisfaction of the Fourth Incremental Amendment Condition, Section 1.01 of the Credit Agreement (as amended pursuant to the Extension Amendment set forth in Section 2 above) is hereby further amended by (x) adding the following defined terms in correct alphabetical order:

“2021 Incremental Revolving Commitments” shall have the meaning set forth in the Fifth Amendment.

“Fourth Incremental Amendment Time” shall have the meaning set forth in the Fifth Amendment.

and (y) by adding the following sentence to the end of the definition of “Class” therein:

Notwithstanding any provision herein to the contrary, from and after the Fourth Incremental Amendment Time, the 2021 Extended Revolving Commitments (as defined in the Fifth Amendment) and the 2021 Incremental Revolving Commitments shall be deemed to be, and treated as, part of a single Class of Revolving Commitments (and any Revolving Loans made pursuant to the 2021 Extended Revolving Commitments and the 2021 Incremental Revolving Commitments shall be deemed to be, and treated as, part of a single Class of Revolving Loans).

(g)Subject to satisfaction of the Fourth Incremental Amendment Condition, for the avoidance of doubt, (i) the loans made pursuant to the 2021 Incremental Revolving Commitments shall be deemed to be “Loans” and “Revolving Loans”, (ii) each 2021 Incremental Revolving Lender shall be deemed to be a “Lender” and a “Revolving Lender” and (iii) the 2021 Incremental Revolving Commitments shall be deemed to be a “Incremental Revolving Commitment”, a “Revolving Commitment Increase” and a “Revolving Commitment”.

(h)For the avoidance of doubt, subject to satisfaction of the Fourth Incremental Amendment Condition, the 2021 Incremental Revolving Commitments, and the Revolving Loans made in connection therewith, shall have the same terms as the 2021 Extended Revolving Commitments and 2021 Extended Revolving Loans, as applicable, and shall bear interest and Commitment Fees, as applicable, as provided for in the Amended Credit Agreement with respect to Revolving Loans and Revolving Commitments, respectively. The parties hereto hereby agree that, notwithstanding anything in the Amended Credit Agreement to the contrary, the Administrative Agent is hereby authorized to take all actions as it may reasonably deem to be necessary to ensure that (a) the 2021 Extended Revolving Commitments constitute Extended Revolving Commitments and Revolving Commitments and (b) the 2021 Incremental Revolving Commitments constitute a Revolving Commitment Increase to the 2021 Extended Revolving Commitments.

(i)This Amendment shall constitute notice to the Administrative Agent by the Borrower requesting the 2021 Incremental Revolving Commitments pursuant to Section 2.19(a) of the Credit Agreement, and, for the avoidance of doubt, shall satisfy such notice requirement set forth in Section 2.19(a) of the Credit Agreement.

4.Joinder. Each 2021 Incremental Revolving Lender acknowledges and agrees that, effective as of the Effective Date, such 2021 Incremental Revolving Lender commits to provide its 2021 Incremental Revolving Commitment from and after the Fourth Incremental Amendment Time, as set forth on Schedule 2.01 attached hereto on the terms set forth herein and in the Amended Credit Agreement and subject to the conditions set forth herein and, from and after the Fourth Incremental Amendment Time, shall be a “Revolving Lender” and “Lender” under, and for all purposes of, the Amended Credit Agreement and the other Loan Documents and shall be subject to and bound by the terms thereof (and shall perform all the obligations of and shall have all the rights of a Lender thereunder).

5.Representations and Warranties. In order to induce the other parties hereto to enter into this Amendment in the manner provided herein, each of Holdings, the Borrower and each Guarantor represents and warrants to the other parties hereto:

(a)immediately prior to giving effect to this Amendment, on and as of the date hereof, each of the representations and warranties set forth in Article 5 of the Credit Agreement and in each other Loan Document are true and correct in all material respects on and as of the date hereof with the same effect as though made on and as of the date hereof, except to the extent such representations and warranties expressly relate to an earlier date, in which case such representations and warranties are true and correct in all material respects as of such earlier date (provided, that any such representation and warranty that is qualified by “materiality,” “material adverse effect” or similar language is true and correct in all respects (after giving effect to any such qualification therein) on and as of such earlier date with the same effect as though made on and as of the date hereof or such earlier date, as applicable);

(b)on and as of the Extension Effective Time and the Fourth Incremental Amendment Time, each of the representations and warranties set forth in Article 5 of the Amended Credit Agreement and in each other Loan Document shall be true and correct in all material respects with the same effect as though made on and as of the Extension Effective Time and the Fourth Incremental Amendment Time, except to the extent such representations and warranties expressly relate to an earlier date, in which case such representations and warranties shall be true and correct in all material respects as of such earlier date (provided, that any such representation and warranty that is qualified by “materiality,” “material adverse effect” or similar language is true and correct in all respects (after giving effect to any such qualification therein) on and as of such earlier date with the same effect as though made on and as of the Extension Effective Time and the Fourth Incremental Amendment Time or such earlier date, as applicable);

(c)as of the date hereof and immediately after giving effect to this Amendment, no Default or Event of Default has occurred and is continuing; and

(d)as of the Extension Effective Time and the Fourth Incremental Amendment Time, no Default or Event of Default shall have occurred and be continuing.

6.Condition to Effectiveness. The effectiveness of this Amendment is subject solely to the condition that the Administrative Agent shall have received counterparts of this Amendment duly executed by Holdings, the Borrower, each Subsidiary Guarantor, the Administrative Agent, the Collateral Agent, each Issuing Bank and each 2021 New Revolving Lender (which collectively constitute all of the Revolving Lenders under the Credit Agreement) (the time at which such condition is so satisfied is referred to herein as the “Effective Date”).

7.Acknowledgement.

(a)The Borrower and each Guarantor hereby confirm that, as of the date hereof and as of the Extension Effective Time and the Fourth Incremental Amendment Time, as applicable, each Loan Document to which it is a party or otherwise bound and all Collateral encumbered thereby will continue to guarantee or secure, as the case may be, to the fullest extent possible in accordance with the Loan Documents the payment and performance of all Obligations and Secured Obligations under each of the Loan Documents to which it is a party (in each case as such terms are defined in the applicable Loan Document).

(b)The Borrower and each Guarantor acknowledge and agree that, as of the date hereof and as of the Extension Effective Time and the Fourth Incremental Amendment Time, as applicable, any of the Loan Documents to which it is a party or otherwise bound shall continue in full force and effect and that all of its obligations thereunder shall be valid and enforceable and shall not be impaired or limited by the execution or effectiveness of this Amendment.

(c)Each of the Borrower and each Guarantor hereby acknowledges that it has reviewed the terms and provisions of this Amendment and consents to the amendment of the Credit Agreement effected pursuant to this Amendment and acknowledges and agrees that, effective as of the Extension Effective Time and the Fourth Incremental Amendment Time, as applicable, each 2021 New Revolving Lender (and any assignee thereof) is a “Lender” and a “Secured Party” for all purposes under the Loan Documents to which the Borrower or such Guarantor is a party.

(d)Each Guarantor acknowledges and agrees that (i) notwithstanding the conditions to effectiveness set forth in this Amendment, such Guarantor is not required by the terms of the Credit Agreement or any other Loan Document to consent to the amendments to the Credit Agreement effected pursuant to this Amendment and (ii) nothing in the Credit Agreement, this Amendment or any other Loan Document shall be deemed to require the consent of such Guarantor to any future amendments to the Credit Agreement.

(e)The parties hereto agree and acknowledge that, for all purposes under the Credit Agreement and the other Loan Documents, this Amendment constitutes (a) an Extension Amendment contemplated by Section 2.21 of the Credit Agreement and (b) an Incremental Amendment contemplated by Section 2.19 of the Credit Agreement.

(f)Each of the Borrower and each Guarantor hereby (i) acknowledges and agrees that all of its obligations under the Guarantees set out in the Amended Credit Agreement and any other guaranties in the Loan Documents to which it is a party are reaffirmed and remain in full force and effect on a continuous basis, (ii) reaffirms each Lien granted by each Loan Party to the Collateral Agent for the benefit of the Secured Parties and reaffirms the Guarantees made pursuant to the Amended Credit Agreement, (iii) acknowledges and agrees that the grants of security interests by and the Guarantees of the Loan Parties contained in the Amended Credit Agreement and the other Collateral Documents are, and shall remain, in full force and effect after giving effect to this Amendment, and (iv) agrees that, effective as of the Extension Effective Time and the Fourth Incremental Amendment Time, as applicable, the Obligations include, among other things and without limitation, the prompt and complete payment and performance by the Borrower when due and payable (whether at the stated maturity, by acceleration or otherwise) of principal and interest on, the Revolving Loans made pursuant to the 2021 New Revolving

Commitments under the Amended Credit Agreement. Nothing contained in this Amendment shall be construed as substitution or novation of the obligations outstanding under the Credit Agreement or the other Loan Documents, which shall remain in full force and effect, except to any extent modified hereby.

(a)THIS AMENDMENT AND ANY CLAIMS, CONTROVERSY, DISPUTE OR CAUSE OF ACTION (WHETHER SOUNDING IN CONTRACT, TORT OR OTHERWISE) BASED UPON, ARISING OUT OF OR RELATING TO THIS AMENDMENT AND THE TRANSACTIONS CONTEMPLATED HEREBY SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK WITHOUT GIVING EFFECT TO ANY CHOICE OF LAW PRINCIPLES THAT WOULD APPLY THE LAWS OF ANOTHER JURISDICTION.

(b)EACH PARTY HERETO HEREBY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN ANY LEGAL PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS AMENDMENT AND THE TRANSACTIONS CONTEMPLATED HEREBY (WHETHER BASED ON CONTRACT, TORT OR OTHERWISE). EACH PARTY HERETO (A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AMENDMENT, BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 8(B).

9.Counterparts. This Amendment may be executed in counterparts (and by different parties hereto on different counterparts), each of which shall constitute an original, but all of which when taken together shall constitute a single contract. Delivery of an executed counterpart of a signature page to this Amendment by facsimile or other electronic imaging transmission shall be as effective as delivery of a manually executed counterpart of this Amendment.

(a)On and after the Effective Date, (x) each reference in the Credit Agreement to “this Agreement”, “hereunder”, “hereof”, “herein” or words of like import referring to the Credit Agreement, and (B) each reference in the other Loan Documents to the “Credit Agreement”, “thereunder”, “thereof”, “therein” or words of like import referring to the Credit Agreement shall mean and be a reference to the Credit Agreement after giving effect to this Amendment (but, (I) with respect to the items expressly stated herein to be subject to the satisfaction of the Extension Conditions, subject to the satisfaction of such Extension Conditions and (II) with respect to the items expressly stated herein to be subject to the satisfaction of the Fourth Incremental Amendment Condition, subject to the satisfaction of such Fourth Incremental Amendment Condition).

(b)Except as specifically amended by this Amendment, the Credit Agreement and each of the other Loan Documents shall remain in full force and effect and are hereby ratified and confirmed.

(c)The execution, delivery and performance of this Amendment shall not constitute a waiver of any provision of, or operate as a waiver of any right, power or remedy of the Agent or Lender under, the Credit Agreement or any of the other Loan Documents.

(d)Each of Holdings, the Borrower and each other Guarantor hereby (i) ratifies, confirms and reaffirms its liabilities, its payment and performance obligations (contingent or otherwise) and its agreements under the Credit Agreement and the other Loan Documents and (ii) acknowledges, ratifies and confirms that such liabilities, obligations and agreements constitute valid and existing Obligations under the Credit Agreement, in each case, to the extent Holdings, the Borrower or such Guarantor, as applicable, is a party thereto. In addition, each of Holdings, the Borrower and each Guarantor hereby ratifies, confirms and reaffirms (i) the liens and security interests granted, created and perfected under the Collateral Documents and any other Loan Documents and (ii) that each of the Collateral Documents to which it is a party remain in full force and effect notwithstanding the effectiveness of this Amendment. Without limiting the generality of the foregoing, each of Holdings, the Borrower and each other Guarantor further agrees (A) that any reference to “Obligations” contained in any Collateral Documents shall include, without limitation, the “Obligations” as such term is defined in the Credit Agreement (as amended by this Amendment from and after the Extension Effective Time and the Fourth Incremental Amendment Time, as applicable) and (B) that the related guarantees and grants of security contained in such Collateral Documents shall include and extend to such Obligations. This Amendment shall not constitute a modification of the Credit Agreement, except as specified under Sections 2 and 3 hereto, or a course of dealing with Agent or any Lender at variance with the Credit Agreement such as to require further notice by Agent or any Lender to require strict compliance with the terms of the Credit Agreement and the other Loan Documents in the future, except as expressly set forth herein. This Amendment contains the entire agreement among Holdings, the Borrower, the other Guarantors, and the 2021 New Revolving Lenders contemplated by this Amendment. Neither Holdings nor the Borrower nor any other Guarantor has any knowledge of any challenge to Agent’s or any Lender’s claims arising under the Loan Documents or the effectiveness of the Loan Documents. Agent and Lenders reserve all rights, privileges and remedies under the Loan Documents. Nothing in this Amendment is intended, or shall be construed, to constitute a novation or an accord and satisfaction of any of the Obligations or to modify, affect or impair the perfection, priority or continuation of the security interests in, security titles to or other Liens on any Collateral for the Obligations.

(e)This Amendment is a Loan Document (as defined in the Amended Credit Agreement).

11.Expenses. The Borrower and Holdings agree, jointly and severally, to pay on demand all reasonable out-of-pocket costs and expenses incurred by the Agent and the 2021 New Revolving Lenders in connection with the preparation, negotiation and execution of this Amendment (whether incurred before or after the Effective Date), including, without limitation, all Attorney Costs of Agent, in each case, to the extent required under Section 10.05 of the Credit Agreement.

12.Successors and Assigns. Notwithstanding the foregoing and anything to the contrary in any Loan Document, this Amendment (and the 2021 New Revolving Commitments) shall not be

assignable by the 2021 New Revolving Lenders prior to the Fourth Incremental Amendment Time without the prior written consent of the Borrower (such consent not to be unreasonably withheld or delayed) and any purported assignment without such consent shall be null and void.

13.Severability. In the event any one or more of the provisions contained in this Amendment should be held invalid, illegal or unenforceable in any respect, the validity, legality and enforceability of the remaining provisions contained herein and therein shall not in any way be affected or impaired thereby (it being understood that the invalidity of a particular provision in a particular jurisdiction shall not in and of itself affect the validity of such provision in any other jurisdiction). The parties shall endeavor in good-faith negotiations to replace the invalid, illegal or unenforceable provisions with valid provisions the economic effect of which comes as close as possible to that of the invalid, illegal or unenforceable provisions.

14.Headings. Section headings used herein are for convenience of reference only, are not part of this Amendment and shall not affect the construction of, or to be taken into consideration in interpreting, this Amendment.

    IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed and delivered by their respective proper and duly authorized officers as of the day and year first written above.

SURGERY CENTER HOLDINGS, INC.,

as Borrower

By:    /s/ Jennifer B. Baldock                

Name:    Jennifer B. Baldock

Title:    Vice President and Secretary

SP HOLDCO I, INC.,

as Holdings

By:    /s/ Jennifer B. Baldock                

Name:    Jennifer B. Baldock

Title:    Vice President and Secretary

By:    /s/ Jennifer B. Baldock            

Name:    Jennifer B. Baldock

Title:    Vice President and Secretary

By:    /s/ Jennifer B. Baldock            

Name:    Jennifer B. Baldock

Title:    Vice President and Secretary

By:    /s/ Jennifer B. Baldock            

Name:    Jennifer B. Baldock

Title:    Vice President and Secretary

By:    /s/ Jennifer B. Baldock            

Name:    Jennifer B. Baldock

Title:    Vice President and Secretary

By:    /s/ Jennifer B. Baldock            

Name:    Jennifer B. Baldock

Title:    Vice President and Secretary