SECOND AMENDEDAND RESTATED LOAN FUNDING AND SERVICING AGREEMENT (ACS Funding Trust I)

Exhibit 10.2

EXECUTION COPY

AMENDMENT NO. 4 TO

SECOND AMENDED AND RESTATED

LOAN FUNDING AND SERVICING AGREEMENT

(ACS Funding Trust I)

THIS AMENDMENT NO. 4 TO SECOND AMENDED AND RESTATED LOAN FUNDING AND SERVICING AGREEMENT, dated as of April 21, 2005 (this “Amendment”), is entered into by and among ACS FUNDING TRUST I, as the borrower (in such capacity, the “Borrower”), AMERICAN CAPITAL STRATEGIES, LTD., as the servicer (in such capacity, the “Servicer”), VARIABLE FUNDING CAPITAL CORPORATION, as a conduit lender (in such capacity, a “Conduit Lender”), WACHOVIA CAPITAL MARKETS, LLC, as the deal agent (in such capacity, the “Deal Agent”), JPMORGAN CHASE BANK, N.A. (“JPMorgan Chase Bank”), as an institutional lender (in such capacity, an “Institutional Lender”) and as the swingline lender (in such capacity, the “Swingline Lender”), CITIGROUP GLOBAL MARKETS REALTY CORP., as an institutional lender (in such capacity, an “Institutional Lender”), YC SUSI TRUST, as a conduit lender (in such capacity, a “Conduit Lender”), Bank of America, National Association, as an institutional lender (in such capacity, an “Institutional Lender”) and as the lender agent for YC SUSI TRUST (in such capacity, a “Lender Agent”) and is acknowledged and agreed to by WACHOVIA BANK, NATIONAL ASSOCIATION, as a hedge counterparty (in such capacity, the “Hedge Counterparty”). Capitalized terms used and not otherwise defined herein shall have the meanings given to such terms in the Agreement (as defined below).

RECITALS

WHEREAS, the parties hereto are parties to that certain Second Amended and Restated Loan Funding and Servicing Agreement, dated as of August 10, 2004 (as amended by Amendment No. 1, dated as of August 27, 2004, Amendment No. 2, dated as of November 15, 2004 and Amendment No. 3, dated as of January 28, 2005, the “Agreement”);

WHEREAS, the parties hereto desire to amend the Agreement in certain respects as provided herein, pursuant to and in accordance with Section 12.1(a) of the Agreement ;

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

SECTION 1. AMENDMENTS.

(a) The defined term “Availability” in Section 1.1 of the Agreement is hereby amended to read in its entirety as follows:

“Availability”: At any time, an amount equal to the excess, if any, of (i) the lesser of (a) the Facility Amount and (b) the Maximum Availability over (ii) the sum of (a) the

Advances Outstanding on such day plus (b) the Aggregate Net Mark to Market Amount; provided, however, that, (x) subject to the other terms and conditions contained herein, with respect to Swingline Advances and Advances against (I) the 2002-1 Class C Securities owned by the Borrower, the Availability (subject to Fair Market Value adjustments) in respect thereof shall be an amount up to $36,850,000, (II) the 2002-2 Class C Securities owned by the Borrower, the Availability (subject to Fair Market Value adjustments) in respect thereof shall be an amount up to $36,840,000 and (III) the 2003-1 Class D Securities owned by the Borrower, the Availability (subject to Fair Market Value adjustments) in respect thereof shall be an amount up to $41,590,000 and (y) for all purposes of this Agreement, during the Amortization Period, the Availability shall be $0.

(b) Clause (j) of the defined term “Concentration Limits” in Section 1.1 of the Agreement is hereby amended to read in its entirety as follows:

(j) on or after June 30, 2005, the sum of the Outstanding Loan Balances of all Eligible Loans included in the Collateral which have been included as part of the Collateral for 12 months or more shall not exceed $50,000,000; provided, that, if a Loan or portion thereof has been transferred, sold, contributed or otherwise conveyed to the Originator or any Affiliate thereof as part of a Permitted Securitization Transaction that is a private placement collateralized loan or collateralized debt obligation transaction, such sum shall be calculated by treating any Loans to the related Obligor remaining in the Collateral as if such Loans were first included in the Collateral as of the date of such Permitted Securitization Transaction.

SECTION 2. AGREEMENT IN FULL FORCE AND EFFECT AS AMENDED.

Except as specifically amended hereby, all provisions of the Agreement shall remain in full force and effect. After this Amendment becomes effective, all references to the Agreement, the “Loan Funding and Servicing Agreement,” “hereof,” “herein,” or words of similar effect referring to the Agreement shall be deemed to mean the Agreement as amended hereby. This Amendment shall not constitute a novation of the Agreement, but shall constitute an amendment and waiver thereof. This Amendment shall not be deemed to expressly or impliedly waive, amend or supplement any provision of the Agreement other than as expressly set forth herein.

SECTION 3. REPRESENTATIONS.

Each of the Borrower and Servicer represent and warrant as of the date of this Amendment as follows:

(a) it is duly incorporated or organized, validly existing and in good standing under the laws of its jurisdiction of incorporation or organization;

(b) the execution, delivery and performance by it of this Amendment are within its powers, have been duly authorized, and do not contravene (i) its charter, by- laws, or other organizational documents, or (ii) any Applicable Law;

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(c) no consent, license, permit, approval or authorization of, or registration, filing or declaration with any governmental authority, is required in connection with the execution, delivery, performance, validity or enforceability of this Amendment by or against it;

(d) this Amendment has been duly executed and delivered by it;

(e) this Amendment constitutes its legal, valid and binding obligation enforceable against it in accordance with its terms, except as enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar laws affecting the enforcement of creditors’ rights generally or by general principles of equity;

(f) it is not in default under the Agreement; and

(g) there is no Termination Event, Unmatured Termination Event, or Servicer Termination Event.

SECTION 4. CONDITIONS TO EFFECTIVENESS.

The effectiveness of this Amendment is conditioned upon (i) payment of the outstanding fees and disbursements of Dechert LLP, as counsel to the Deal Agent and (ii) delivery of executed signature pages by all parties hereto to the Deal Agent.

SECTION 5. MISCELLANEOUS.

(a) This Amendment may be executed in any number of counterparts (including by facsimile), and by the different parties hereto on the same or separate counterparts, each of which shall be deemed to be an original instrument but all of which together shall constitute one and the same agreement.

(b) The descriptive headings of the various sections of this Amendment are inserted for convenience of reference only and shall not be deemed to affect the meaning or construction of any of the provisions hereof.

(c) This Amendment may not be amended or otherwise modified except as provided in the Agreement.

(d) The failure or unenforceability of any provision hereof shall not affect the other provisions of this Amendment.

(e) Whenever the context and construction so require, all words used in the singular number herein shall be deemed to have been used in the plural, and vice versa, and the masculine gender shall include the feminine and neuter and the neuter shall include the masculine and feminine.

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(f) This Amendment represents the final agreement between the parties and may not be contradicted by evidence of prior, contemporaneous or subsequent oral agreements between the parties. There are no unwritten oral agreements between the parties.

(g) THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES UNDER THIS AMENDMENT SHALL BE GOVERNED BY AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

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IN WITNESS WHEREOF, the parties have caused this Amendment to be executed by their respective officers thereunto duly authorized, as of the date first above written.

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4^th Amendment to 2^nd Amended and Restated Loan Funding

and Servicing Agreement

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4^th Amendment to 2^nd Amended and Restated Loan Funding

and Servicing Agreement

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4^th Amendment to 2^nd Amended and Restated Loan Funding

and Servicing Agreement

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4^th Amendment to 2^nd Amended and Restated Loan Funding

and Servicing Agreement

4^th Amendment to 2^nd Amended and Restated Loan Funding

and Servicing Agreement