MSC Income Fund : 2nd Quarter 2026 Summary Factsheet

About this update from Motorola Solutions, Inc.

‌ABOUT THE FUND MSC Income Fund, Inc. (MSC Income or the Fund) is a publicly traded (NYSE: MSIF) business development company (BDC) that provides capital to private U.S. companies. MSC Income has been externally managed by a wholly-owned subsidiary of Main Street Capital Corporation (Main Street), a publicly traded (NYSE: MAIN) BDC with over $9.0 billion (1) in capital under management, since October 2020. Main Street, through its wholly-owned subsidiary, was previously a sub-adviser to MSC Income since May 2012. MSC Income has $1.6 billion (2) of capital. INVESTMENT OBJECTIVES Primarily to generate current income through debt investments and secondarily to generate current income and long-term capital appreciation through equity and equity-related investments INVESTMENT CONSIDERATIONS Attractive yield from secured debt investments (11.0% (3) weighted-average effective yield as of June 30, 2026) Dividend income, fair value appreciation and periodic capital gains from equity investments Primary investment focus on attractive Private Loan investment strategy focused on first lien debt investments in privately held companies typically owned by or being acquired by a private equity fund Attractive existing lower middle market (LMM) investment portfolio Maintains a diversified investment portfolio across multiple companies, industries, regions and end markets Benefit from strong and growing "Main Street" brand recognition and strong transaction sourcing network Management team has over 100 years of collective investment experience and long-term working relationships dating back over 20 years Conservative, well capitalized balance sheet (net debt to net asset value (NAV) ratio (4) of 0.85) ‌INVESTMENT PORTFOLIO FOCUS Primarily focused on Private Loan investment strategy, which generally includes debt investments in privately held companies typically owned by or being acquired by a private equity fund Primarily originated by Main Street directly or, to a lesser extent, through Main Street's strategic relationships with other investment funds on a collaborative basis through investments that are often referred to in the debt markets as "club deals" because of the small lender group size Primarily first lien debt securities; limited equity investments Generally companies with annual revenues between $25 million and $500 million and annual EBITDA between $7.5 million and $50 million Maintains portfolio of debt and equity investments in LMM companies Combination of secured debt investments and equity investments which provide meaningful equity participation Low leverage and enterprise valuation multiples provide attractive risk-adjusted returns Generally companies with annual revenues between $10 million and $150 million and annual EBITDA between $3 million and $20 million ATTRACTIVE SHAREHOLDER DIVIDENDS Declared fourth quarter 2026 regular monthly dividends of $0.33 per share for the quarter ($0.11 per share payable in each of October, November and December 2026) Declared supplemental dividend of $0.03 per share to be paid in December 2026 MSC Income's total dividends payable in the fourth quarter of 2026, including the regular monthly dividends ($0.33 per share for the quarter) and the supplemental dividend ($0.03 per share), result in a current total dividend yield of 12.6% (1) Currently expect to continue paying regular monthly dividends and supplemental dividends in the future, with such dividends based upon the level of MSC Income's operating performance and financial results, and subject to the approval of MSC Income's Board of Directors SHARE REPURCHASE PLAN In August 2026, MSC Income's Board of Directors authorized a share repurchase plan pursuant to which the Fund may repurchase up to $20.0 million of shares of its common stock for a period beginning in September 2026 and ending in February 2027, at times when the Fund's common stock is trading below its most recently reported NAV per share by certain pre-determined levels In conjunction with MSC Income's repurchase plan, in August 2026, Main Street authorized a share purchase plan pursuant to which Main Street may purchase up to $20.0 million of shares of the Fund's common stock, with the terms of such plan being identical to MSC Income's repurchase plan Any share purchases on any single trading day would be split by MSC Income and Main Street on a pro rata basis (50% MSC Income / 50% Main Street) Note: Refer to Endnotes on the last page of this presentation Page 2 ‌HIGH QUALITY, MATURE AND DIVERSIFIED INVESTMENT PORTFOLIO Diversity adds structural protection to investment portfolio, revenue sources, income, cash flows and dividends Investments in 144 portfolio companies (1) (81 Private Loan, 55 LMM (2) and 8 Middle Market (3) ) Significant diversification Average investment size of $9.0 million (1)(4) Largest individual portfolio companies represent 3.2% (5) of total investment income and 3.6% of total portfolio fair value (with most investments representing less than 1.0% of income and fair value) Investments on non-accrual status represent 1.9% of the total investment portfolio at fair value and 5.8% at cost Total portfolio investments at fair value equal approximately 106% of cost basis INDUSTRY (1)(4) GEOGRAPHY (1)(4)(6) 23% 23% 19% 20% 15% Note: Refer to Endnotes on the last page of this presentation Page 3 ‌MSC INCOME FINANCIAL PERFORMANCE Total Investment Income ($ in millions) Adjusted Net Investment Income (ANII) (1) ($ in millions) Year over Year Change Year over Year Change $135.0 $120.0 $105.0 $90.0 $75.0 $60.0 $45.0 $30.0 $15.0 $0.0 15% 27% 3% 3% 1% (2) $139.2 $131.4 $134.8 $103.8 $90.1 $69.8 $70.0 $60.0 $50.0 $40.0 $30.0 $20.0 $10.0 $0.0 (1)% 5% (3)% 20% (5)% (2) $64.5 $53.4 $55.5 $52.9 $53.9 $30.5 2021 2022 2023 2024 2025 YTD 2026 2021 2022 2023 2024 2025 YTD (3) (3) 2026 $1,600 $1,400 Portfolio Investments (4) $1,200 $1,000 $800 $600 $400 Total Portfolio Investments (4) and ANII per share (1) ($ in millions, except per share data) $1.42 $1.39 $1.39 $1.34 $1.32 $1.34 $1.36 $1.18 $1,389 $1,335 $1,178 $1,077 $1,093 $1,028 $1,068 $826 $1.40 $1.20 ANII Per Share (1) $1.00 $0.80 $0.60 $0.40 $200 $0.20 $0 2019 2020 2021 2022 2023 2024 2025 June 30, 2026 (5) $0.00 (4) (1) Note: Refer to Endnotes on the last page of this presentation Page 4 ‌KEY INVESTOR CONTACTS Dwayne L. Hyzak, Chief Executive Officer & Chairman of the Board - [email protected] Cory E. Gilbert, Chief Financial Officer - [email protected] Ali Palomo, VP, Investor Relations, Asset Management Business - [email protected] MSC Income Fund, Inc. 1300 Post Oak Blvd, 8 th Floor Houston, Texas 77056 (713) 350-6000 https://www.mscincomefund.com ‌ENDNOTES PAGE 1 Includes total assets plus the undrawn portion of debt capital and uncalled equity capital commitments as of June 30, 2026 Includes total assets plus the undrawn portion of debt capital as of June 30, 2026 Weighted-average effective yield is calculated using the applicable interest rates as of June 30, 2026 and is weighted based upon the principal amount of each debt investment as of June 30, 2026; includes amortization of deferred debt origination fees and accretion of original issue discount, but excludes fees payable upon repayment of the debt investments and any debt investments on non-accrual status Net debt in this ratio includes par value of total debt less cash and cash equivalents; See the MSC Income Investor Presentation , available on MSC Income's website, for Non-GAAP information disclosures (page 29) PAGE 2 As of and based upon the closing market price on August 5, 2026 of $11.47 per share and the annualized most recently declared fourth quarter 2026 monthly dividends (totaling $0.33 per share) and December 2026 supplemental dividend ($0.03 per share) , for total dividends payable in the fourth quarter of $0.36 per share PAGE 3 Excluding MSC Income's Other Portfolio investments, as defined in the Fund's U.S. Securities and Exchange Commission (SEC) filings, which represent approximately 1% of the total investment portfolio at cost Effective as of the listing of MSC Income's common shares on the NYSE on January 29, 2025, the Fund stopped making investments in new LMM portfolio companies; as such, the Fund expects the size of its LMM investment portfolio to decline in future periods as its existing LMM investments are repaid or sold Middle Market investments as defined in the Fund's SEC filings; the Fund has generally stopped making new Middle Market investments and expects the size of its Middle Market investment portfolio to continue to decline in future periods as its existing Middle Market investments are repaid or sold As of June 30, 2026; based on cost Based upon total investment income for the trailing twelve-month period ended June 30, 2026 As of June 30, 2026; based upon portfolio company headquarters and excluding any MSC Income investments in portfolio companies headquartered outside of the U.S., which represent approximately 4% of the total investment portfolio at cost PAGE 4 See the MSC Income Investor Presentation , available on MSC Income's website, for the reconciliation of ANII to NII and ANII per share to NII per share (page 22) and for Non-GAAP information disclosures (page 29) Reflects year-to-date June 30, 2026 performance compared with year-to-date June 30, 2025 performance Six months ended June 30, 2026 Based on fair value at the end of the period ANII per share for trailing twelve-month period ended June 30, 2026 For more detailed information regarding the financial and other information included herein, please refer to MSC Income's Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2026 (the Second Quarter 2026 Form 10-Q) filed with the SEC ( www.sec.gov ) and MSC Income's Second Quarter 2026 Investor Presentation posted on the investor relations section of the Fund's website at https:// www.mscincomefund.com/investors/news/presentations . The financial and other information included herein should be read in conjunction with MSC Income's consolidated financial statements and the notes thereto and other information included in the Second Quarter 2026 Form 10-Q . Note: Refer to Endnotes on the last page of this presentation Page

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