Third Quarter 2025 Net Investment Income of $0.97 Per Share

Third Quarter 2025 Distributable Net Investment Income⁽¹⁾ of $1.03 Per Share

Net Asset Value of $32.78 Per Share

HOUSTON, Nov. 6, 2025 /PRNewswire/ -- Main Street Capital Corporation (NYSE:MAIN) ("Main Street") is pleased to announce its financial results for the third quarter ended September 30, 2025. Unless otherwise noted or the context otherwise indicates, the terms "we," "us," "our" and "the Company" refer to Main Street and its consolidated subsidiaries.

Third Quarter 2025 Highlights

Net investment income ("NII"), including excise tax and NII related income taxes, of $86.5 million, or $0.97 per share
Distributable net investment income ("DNII")⁽¹⁾, including excise tax and NII related income taxes, of $92.7 million, or $1.03 per share
DNII before taxes⁽²⁾ of $95.7 million, or $1.07 per share
Total investment income of $139.8 million
An industry leading position in cost efficiency, with a ratio of total non-interest operating expenses as a percentage of quarterly average total assets ("Operating Expenses to Assets Ratio") of 1.4% on an annualized basis for the quarter and 1.3% for the trailing twelve-month ("TTM") period ended September 30, 2025
Net increase in net assets resulting from operations of $123.7 million, or $1.38 per share
Return on equity⁽³⁾ of 17.0% on an annualized basis for the quarter and 19.0% for the TTM period ended September 30, 2025
Net asset value of $32.78 per share as of September 30, 2025, representing an increase of $0.48 per share, or 1.5%, compared to $32.30 per share as of June 30, 2025 and $1.13 per share, or 3.6%, compared to $31.65 per share as of December 31, 2024
Declared regular monthly dividends totaling $0.765 per share for the fourth quarter of 2025, or $0.255 per share for each of October, November and December 2025, representing a 4.1% increase from the regular monthly dividends paid in the fourth quarter of 2024
Declared and paid a supplemental dividend of $0.30 per share, resulting in total dividends paid in the third quarter of 2025 of $1.065 per share and representing a 2.9% increase from the total dividends paid in the third quarter of 2024
Completed $106.2 million in total lower middle market ("LMM") portfolio investments, including investments totaling $69.0 million in three new LMM portfolio companies, which after aggregate repayments of debt investments, return of invested equity capital and a decrease in cost basis due to realized losses resulted in a net increase of $61.3 million in the total cost basis of the LMM investment portfolio
Completed $113.3 million in total private loan portfolio investments, which after aggregate repayments of debt investments and a decrease in cost basis due to realized losses resulted in a net decrease of $68.8 million in the total cost basis of the private loan investment portfolio
Net decrease of $14.8 million in the total cost basis of the middle market investment portfolio
Further diversified capital structure by issuing $350.0 million of 5.40% unsecured notes due August 15, 2028 (the "August 2028 Notes")

In commenting on the Company's operating results for the third quarter of 2025, Dwayne L. Hyzak, Main Street's Chief Executive Officer, stated, "We are pleased with our performance in the third quarter, which resulted in another quarter of strong operating results highlighted by an annualized return on equity of 17.0%, favorable levels of net investment income per share and distributable net investment income per share and another record for net asset value per share primarily driven by a significant net fair value increase of our existing lower middle market investment portfolio. We believe that these continued strong results demonstrate the sustainable strength of our overall platform, the benefits of our differentiated and diversified investment strategies, the unique contributions of our asset management business and the continued underlying strength and quality of our portfolio companies."

Mr. Hyzak continued, "Our strong third quarter performance resulted in the declaration of another $0.30 per share supplemental dividend to be paid in December 2025, representing our seventeenth consecutive quarterly supplemental dividend, to go with the 11 increases to our regular monthly dividends declared since the fourth quarter of 2021. Additionally, with the continued support from our long-term lender relationships, and the benefits of our recent investment grade notes offering in August 2025, we continue to maintain very strong liquidity and a conservative leverage profile, which we believe is important in the current economic environment. We remain confident that our diversified lower middle market and private loan investment strategies, both of which are generating favorable investment activity in the fourth quarter, together with the benefits of our asset management business, our cost efficient operating structure and conservative capital structure, will allow us to continue to deliver superior results for our shareholders."

Third Quarter 2025 Operating Results

The following table provides a summary of our operating results for the third quarter of 2025:

	Three Months Ended September 30,
	2025	2024	Change ($)	Change (%)
	(in thousands, except per share amounts)
Interest income	$ 103,286	$ 110,551	$ (7,265)	(7) %
Dividend income	31,263	23,239	8,024	35 %
Fee income	5,282	3,034	2,248	74 %
Total investment income	$ 139,831	$ 136,824	$ 3,007	2 %

Net investment income (4)	$ 86,538	$ 84,380	$ 2,158	3 %
Net investment income per share (4)	$ 0.97	$ 0.96	$ 0.01	1 %

Distributable net investment income (1)(4)	$ 92,705	$ 89,757	$ 2,948	3 %
Distributable net investment income per share (1)(4)	$ 1.03	$ 1.03	$ -	- %

Net increase in net assets resulting from operations	$ 123,671	$ 124,007	$ (336)	- %
Net increase in net assets resulting from operations per share	$ 1.38	$ 1.42	$ (0.04)	(3) %

The $3.0 million increase in total investment income in the third quarter of 2025 from the comparable period of the prior year was principally attributable to (i) an $8.0 million increase in dividend income, primarily due to a $6.6 million increase in dividend income from our LMM portfolio companies, a $0.7 million increase in dividend income from our other portfolio investments and a $0.5 million increase in dividend income from our External Investment Manager (as defined in the External Investment Manager section below) and (ii) a $2.2 million increase in fee income, primarily due to a $1.4 million increase in fees related to increased investment activity and a $0.9 million increase from the refinancing and prepayment of debt investments, with these increases partially offset by a $7.3 million decrease in interest income, principally attributable to a decrease in interest rates, primarily resulting from decreases in benchmark index rates on floating rate debt investments and decreases in interest rate spreads on existing debt investments, and an increase in investments on non-accrual status, partially offset by higher average levels of income producing investment portfolio debt investments. The $3.0 million increase in total investment income in the third quarter of 2025 includes the impact of an increase of $2.1 million in certain income considered less consistent or non-recurring, primarily related to (i) a $0.9 million increase in such fee income, (ii) a $0.6 million increase in such dividend income and (iii) a $0.6 million increase in such interest income from accelerated prepayment, repricing and other activity related to certain investment portfolio debt investments, in each case when compared to the same period in 2024.

Total cash expenses⁽⁵⁾ increased $0.3 million, or 0.7%, to $44.1 million in the third quarter of 2025 from $43.9 million for the same period in 2024. This increase in total cash expenses was principally attributable to a $1.3 million increase in cash compensation expenses,⁽⁵⁾ partially offset by a $1.0 million decrease in interest expense. The increase in cash compensation expenses⁽⁵⁾is primarily related to (i) increased incentive compensation accruals, (ii) increased base compensation rates and (iii) increased headcount to support our growing investment portfolio and asset management activities. The decrease in interest expense is primarily related to a decreased weighted-average interest rate on our Credit Facilities (as defined in the Liquidity and Capital Resources section below) due to decreases in benchmark index rates and decreases to the applicable margin rates related to the amendments of our Credit Facilities in April 2025, partially offset by an increase in average borrowings outstanding used to fund a portion of the growth of our investment portfolio.

Non-cash compensation expenses⁽⁵⁾ increased $0.8 million in the third quarter of 2025 from the comparable period of the prior year, primarily driven by a $0.6 million increase in share-based compensation.

Our Operating Expenses to Assets Ratio (which includes non-cash compensation expenses⁽⁵⁾) on an annualized basis was 1.4% for the third quarter of 2025, an increase from 1.3% for the third quarter of 2024.

Excise tax expense increased $0.4 million and NII related federal and state income and other tax expenses decreased $0.6 million in the third quarter of 2025 compared to the same period in 2024, resulting in a net decrease in tax expenses included in NII of $0.2 million. The increase in excise tax is due to the increase in undistributed taxable income as of September 30, 2025 and the decrease in NII related federal and state income and other tax expenses is due to a decrease in taxable NII between the relevant periods.

The $2.2 million increase in NII and the $2.9 million increase in DNII⁽¹⁾in the third quarter of 2025 from the comparable period of the prior year were both principally attributable to the increase in total investment income, partially offset by increased expenses, each as discussed above. NII per share increased by $0.01 per share for the third quarter of 2025 as compared to the third quarter of 2024, to $0.97 per share. DNII⁽¹⁾ per share for the third quarter of 2025 was consistent with the third quarter of 2024, at $1.03 per share for each period. NII and DNII⁽¹⁾ on a per share basis in the third quarter of 2025 include the impact of a 2.5% increase in the weighted-average shares outstanding compared to the third quarter of 2024, primarily due to shares issued since the beginning of the comparable period of the prior year through our (i) at-the-market ("ATM") equity issuance program, (ii) dividend reinvestment plan and (iii) equity incentive plans. NII and DNII⁽¹⁾on a per share basis in the third quarter of 2025 each include a net increase of $0.02 per share resulting from an increase in investment income considered less consistent or non-recurring in nature compared to the third quarter of 2024, as discussed above.

The $123.7 million net increase in net assets resulting from operations in the third quarter of 2025 represents a $0.3 million decrease from the third quarter of 2024. This decrease was primarily the result of a $4.2 million decrease in the net fair value change of our portfolio investments resulting from the net impact of net realized gains/losses and net unrealized appreciation/depreciation, with the decrease resulting from a net fair value increase of $43.9 million in the third quarter of 2025 compared to a net fair value increase of $48.1 million in the prior year, partially offset by (i) a $2.2 million increase in NII as discussed above and (ii) a $1.8 million decrease in net tax provision on the net fair value change of our portfolio investments resulting from a net tax provision of $6.7 million in the third quarter of 2025 compared to a net tax provision of $8.5 million in the prior year. The $43.9 million net fair value increase in the third quarter of 2025 was the result of net unrealized appreciation (including the reversal of net fair value depreciation in prior periods on the net realized loss in the quarter) of $63.0 million, partially offset by a net realized loss of $19.1 million. The $48.1 million net fair value increase in the third quarter of 2024 was the result of a net realized gain of $26.4 million and net unrealized appreciation of $21.7 million. The $19.1 million net realized loss from investments for the third quarter of 2025 was primarily the result of (i) $15.8 million of realized losses on the restructures of two private loan portfolio investments and (ii) $10.2 million of realized losses on the full exits of two LMM portfolio investments, partially offset by (i) a $6.0 million realized gain on the full exit of a LMM portfolio investment and (ii) a $0.6 million realized gain on the partial exit of an other portfolio investment.

The following table provides a summary of the total net unrealized appreciation of $63.0 million for the third quarter of 2025:

	Three Months Ended September 30, 2025
	LMM (a)	Private Loan	Middle Market	Other		Total
	(in millions)
Accounting reversals of net unrealized (appreciation) depreciation recognized in prior periods due to net realized (gains / income) losses recognized during the current period	$ 3.2	$ 13.7	$ -	$ (0.6)		$ 16.3
Net unrealized appreciation (depreciation) relating to portfolio investments	47.6	13.1	(4.4)	(9.6)	(b)	46.7
Total net unrealized appreciation (depreciation) relating to portfolio investments	$ 50.8	$ 26.8	$ (4.4)	$ (10.2)		$ 63.0

___________________________
(a)	LMM includes unrealized appreciation on 42 LMM portfolio investments and unrealized depreciation on 17 LMM portfolio investments.
(b)	Primarily consists of $6.3 million of unrealized depreciation related to the External Investment Manager.

Liquidity and Capital Resources

As of September 30, 2025, we had aggregate liquidity of $1.561 billion, including (i) $30.6 million in cash and cash equivalents and (ii) $1.530 billion of aggregate unused capacity under our corporate revolving credit facility (the "Corporate Facility") and our special purpose vehicle revolving credit facility (the "SPV Facility" and, together with the Corporate Facility, the "Credit Facilities"), which we maintain to support our investment and operating activities.

Several details regarding our capital structure as of September 30, 2025 are as follows:

The Corporate Facility included $1.145 billion in total commitments from a diversified group of 19 participating lenders, plus an accordion feature that allows us to request an increase in the total commitments under the facility to up to $1.718 billion.
$135.0 million in outstanding borrowings under the Corporate Facility, with an interest rate of 6.0% based on the applicable Secured Overnight Financing Rate ("SOFR") effective for the contractual reset date of October 1, 2025.
The SPV Facility included $600.0 million in total commitments from a diversified group of six participating lenders, plus an accordion feature that allows us to request an increase in the total commitments under the facility to up to $800.0 million.
$76.0 million in outstanding borrowings under the SPV Facility, with an interest rate of 6.1% based on the applicable SOFR effective for the contractual reset date of October 1, 2025.
$500.0 million of unsecured notes outstanding that bear interest at a rate of 3.00% per year (the "July 2026 Notes"). The July 2026 Notes mature on July 14, 2026 and may be redeemed in whole or in part at any time at our option subject to certain make-whole provisions.
$400.0 million of unsecured notes outstanding that bear interest at a rate of 6.50% per year with a yield-to-maturity of approximately 6.34% (the "June 2027 Notes"). The June 2027 Notes mature on June 4, 2027 and may be redeemed in whole or in part at any time at our option subject to certain make-whole provisions.
$350.0 million of August 2028 Notes outstanding that bear interest at a rate of 5.40% per year. The August 2028 Notes mature on August 15, 2028 and may be redeemed in whole or in part at any time at our option subject to certain make-whole provisions.
$350.0 million of unsecured notes outstanding that bear interest at a rate of 6.95% per year (the "March 2029 Notes"). The March 2029 Notes mature on March 1, 2029 and may be redeemed in whole or in part at any time at our option subject to certain make-whole provisions.
$350.0 million of outstanding Small Business Investment Company ("SBIC") debentures through our wholly-owned SBIC subsidiaries. These debentures, which are guaranteed by the U.S. Small Business Administration (the "SBA"), had a weighted-average annual fixed interest rate of 3.26% and mature ten years from original issuance. The first maturity related to our existing SBIC debentures occurs in the first quarter of 2027, and the weighted-average remaining duration was 4.9 years.
In September 2025, we repaid the entire $150.0 million of notes outstanding that bore interest at a weighted-average rate of 7.74% per year (the "December 2025 Notes"), at par value plus the accrued unpaid interest.
We maintain investment grade credit ratings from each of Fitch Ratings and S&P Global Ratings, both of which have assigned us investment grade credit ratings of BBB- with a stable outlook. S&P Global Ratings reaffirmed its rating during the third quarter of 2025.
Our net asset value totaled $2.9 billion, or $32.78 per share.

Investment Portfolio Information as of September 30, 2025⁽⁶⁾

The following table provides a summary of the investments in our LMM portfolio and private loan portfolio as of September 30, 2025:

	As of September 30, 2025
	LMM (a)	Private Loan
	(dollars in millions)
Number of portfolio companies	88	86
Fair value	$ 2,782.2	$ 1,886.5
Cost	$ 2,167.5	$ 1,898.3
Debt investments as a % of portfolio (at cost)	70.7 %	94.0 %
Equity investments as a % of portfolio (at cost)	29.3 %	6.0 %
% of debt investments at cost secured by first priority lien	99.3 %	99.9 %
Weighted-average annual effective yield (b)	12.7 %	11.1 %
Average EBITDA (c)	$ 10.3	$ 34.3

__________________________
(a)	We had equity ownership in all of our LMM portfolio companies, and our average fully diluted equity ownership in those portfolio companies was 38%.
(b)	The weighted-average annual effective yields were computed using the effective interest rates for all debt investments as of September 30, 2025, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status, and are weighted based upon the principal amount of each applicable debt investment as of September 30, 2025.
(c)	The average EBITDA (Earnings Before Interest, Taxes, Depreciation and Amortization) is calculated using a simple average for the LMM portfolio and a weighted-average for the private loan portfolio. These calculations exclude certain portfolio companies, including five LMM portfolio companies and six private loan portfolio companies, as EBITDA is not a meaningful valuation metric for our investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate and those portfolio companies whose primary operations have ceased and only residual value remains.

The fair value of our LMM portfolio company equity investments was 204% of the cost of such equity investments, and our LMM portfolio companies had a median net senior debt (senior interest-bearing debt through our debt position less cash and cash equivalents) to EBITDA ratio of 2.7 to 1.0 and a median total EBITDA to senior interest expense ratio of 3.0 to 1.0. Including all debt that is junior in priority to our debt position, these median ratios were 2.7 to 1.0 and 3.0 to 1.0, respectively.⁽⁶⁾⁽⁷⁾

As of September 30, 2025, our investment portfolio also included:

Other portfolio investments in 32 entities, spread across 12 investment managers, collectively totaling $122.8 million in fair value and $130.9 million in cost basis, which comprised 2.4% and 3.0% of our investment portfolio at fair value and cost, respectively;
Middle market portfolio investments in 11 portfolio companies, collectively totaling $89.9 million in fair value and $119.8 million in cost basis, which comprised 1.7% and 2.8% of our investment portfolio at fair value and cost, respectively; and
Our investment in the External Investment Manager, with a fair value of $266.4 million and a cost basis of $29.5 million, which comprised 5.2% and 0.7% of our investment portfolio at fair value and cost, respectively.

As of September 30, 2025, investments on non-accrual status comprised 1.2% of the total investment portfolio at fair value and 3.6% at cost, and our total portfolio investments at fair value were 118% of the related cost basis.

External Investment Manager

MSC Adviser I, LLC is our wholly-owned portfolio company and registered investment adviser that provides investment management services to external parties (the "External Investment Manager"). We share employees with the External Investment Manager and allocate costs related to such shared employees and other operating expenses to the External Investment Manager. The total contribution of the External Investment Manager to our NII consists of the combination of the expenses we allocate to the External Investment Manager and the dividend income we earn from the External Investment Manager. During the third quarter of 2025, the External Investment Manager earned $9.7 million of total fee income, an increase of $1.0 million from the third quarter of 2024. The fee income earned by the External Investment Manager in the third quarter of 2025 included (i) $5.6 million of management fee income, a decrease of $0.5 million from the third quarter of 2024, and (ii) incentive fees of $3.9 million, an increase of $1.5 million from the third quarter of 2024. In addition, we allocated $5.7 million of total expenses to the External Investment Manager, an increase of $0.4 million from the third quarter of 2024. The decrease in management fee income was primarily attributable to a decrease in the base management fees earned resulting from changes in the advisory agreement between the External Investment Manager and its client, MSC Income Fund, Inc., in conjunction with the listing of MSC Income Fund, Inc.'s shares on the New York Stock Exchange in January 2025, partially offset by an increase total assets managed for clients. The increase in incentive fees was attributable to the favorable performance and improved operating results from the assets managed for clients in the third quarter of 2025 relative to the third quarter of 2024. The combination of the dividend income we earned from the External Investment Manager and expenses we allocated to it resulted in a total contribution to our NII of $8.8 million, representing an increase of $0.9 million from the third quarter of 2024.

The External Investment Manager ended the third quarter of 2025 with total assets under management of $1.6 billion.

Third Quarter 2025 Financial Results Conference Call / Webcast

Main Street has scheduled a conference call for Friday, November 7, 2025 at 10:00 a.m. Eastern time to discuss the third quarter 2025 financial results.

You may access the conference call by dialing 412-902-0030 at least 10 minutes prior to the start time. The conference call can also be accessed via a simultaneous webcast by logging into the investor relations section of the Main Street website at https://www.mainstcapital.com.

A telephonic replay of the conference call will be available through Friday, November 14, 2025 and may be accessed by dialing 201-612-7415 and using the passcode 13752817#. An audio archive of the conference call will also be available on the investor relations section of the Company's website at https://www.mainstcapital.com shortly after the call and will be accessible until the date of Main Street's earnings release for the next quarter.

For a more detailed discussion of the financial and other information included in this press release, please refer to the Main Street Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2025 to be filed with the U.S. Securities and Exchange Commission (www.sec.gov) and Main Street's Third Quarter 2025 Investor Presentation to be posted on the investor relations section of the Main Street website at https://www.mainstcapital.com.

ABOUT MAIN STREET CAPITAL CORPORATION

Main Street (www.mainstcapital.com) is a principal investment firm that primarily provides customized long-term debt and equity capital solutions to lower middle market companies and debt capital to private companies owned by or in the process of being acquired by a private equity fund. Main Street's portfolio investments are typically made to support management buyouts, recapitalizations, growth financings, refinancings and acquisitions of companies that operate in diverse industry sectors. Main Street seeks to partner with entrepreneurs, business owners and management teams and generally provides customized "one-stop" debt and equity financing solutions within its lower middle market investment strategy. Main Street seeks to partner with private equity fund sponsors and primarily invests in secured debt investments in its private loan investment strategy. Main Street's lower middle market portfolio companies generally have annual revenues between $10 million and $150 million. Main Street's private loan portfolio companies generally have annual revenues between $25 million and $500 million.

Main Street, through its wholly-owned portfolio company MSC Adviser I, LLC ("MSC Adviser"), also maintains an asset management business through which it manages investments for external parties. MSC Adviser is registered as an investment adviser under the Investment Advisers Act of 1940, as amended.

FORWARD-LOOKING STATEMENTS

Main Street cautions that statements in this press release which are forward–looking and provide other than historical information, including but not limited to Main Street's ability to successfully source and execute on new portfolio investments and deliver future financial performance and results, are based on current conditions and information available to Main Street as of the date hereof and include statements regarding Main Street's goals, beliefs, strategies and future operating results and cash flows. Although its management believes that the expectations reflected in those forward–looking statements are reasonable, Main Street can give no assurance that those expectations will prove to be correct. Those forward-looking statements are made based on various underlying assumptions and are subject to numerous uncertainties and risks, including, without limitation: Main Street's continued effectiveness in raising, investing and managing capital; adverse changes in the economy generally or in the industries in which Main Street's portfolio companies operate; the impacts of macroeconomic factors on Main Street and its portfolio companies' businesses and operations, liquidity and access to capital, and on the U.S. and global economies, including impacts related to pandemics and other public health crises, global conflicts, risk of recession, tariffs and trade disputes, inflation, supply chain constraints or disruptions and changes in market index interest rates; changes in laws and regulations or business, political and/or regulatory conditions that may adversely impact Main Street's operations or the operations of its portfolio companies; the operating and financial performance of Main Street's portfolio companies and their access to capital; retention of key investment personnel; competitive factors; and such other factors described under the captions "Cautionary Statement Concerning Forward-Looking Statements" and "Risk Factors" included in Main Street's filings with the U.S. Securities and Exchange Commission (www.sec.gov). Main Street undertakes no obligation to update the information contained herein to reflect subsequently occurring events or circumstances, except as required by applicable securities laws and regulations.

MAIN STREET CAPITAL CORPORATION Consolidated Statements of Operations (in thousands, except shares and per share amounts) (Unaudited)

	Three Months Ended September 30,		Nine Months Ended September 30,
	2025	2024	2025	2024
INVESTMENT INCOME:
Interest, fee and dividend income:
Control investments	$ 60,027	$ 50,134	$ 176,481	$ 152,572
Affiliate investments	22,407	20,884	71,908	61,813
Non–Control/Non–Affiliate investments	57,397	65,806	172,461	186,201
Total investment income	139,831	136,824	420,850	400,586
EXPENSES:
Interest	(32,472)	(33,474)	(96,159)	(89,411)
Compensation	(13,217)	(11,644)	(37,370)	(35,225)
General and administrative	(4,928)	(4,564)	(15,933)	(14,159)
Share–based compensation	(5,433)	(4,868)	(15,691)	(13,853)
Expenses allocated to the External Investment Manager	5,734	5,322	16,962	16,768
Total expenses	(50,316)	(49,228)	(148,191)	(135,880)
NET INVESTMENT INCOME BEFORE TAXES	89,515	87,596	272,659	264,706
Excise tax expense	(838)	(458)	(2,997)	(1,652)
Federal and state income and other tax expenses	(2,139)	(2,758)	(9,044)	(8,340)
NET INVESTMENT INCOME (4)	86,538	84,380	260,618	254,714
NET REALIZED GAIN (LOSS):
Control investments	(9,988)	-	(12,964)	(352)
Affiliate investments	(2)	32	57,709	786
Non–Control/Non–Affiliate investments	(9,114)	26,350	(40,974)	16,995
Total net realized gain (loss)	(19,104)	26,382	3,771	17,429
NET UNREALIZED APPRECIATION (DEPRECIATION):
Control investments	23,461	50,348	57,016	88,007
Affiliate investments	13,260	7,181	4,518	22,609
Non–Control/Non–Affiliate investments	26,257	(35,791)	45,683	(25,185)
Total net unrealized appreciation	62,978	21,738	107,217	85,431
Income tax provision on net realized gain (loss) and net unrealized appreciation	(6,741)	(8,493)	(9,319)	(23,727)
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	$ 123,671	$ 124,007	$ 362,287	$ 333,847
NET INVESTMENT INCOME PER SHARE-BASIC AND DILUTED (4)	$ 0.97	$ 0.96	$ 2.92	$ 2.95
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS PER SHARE-BASIC AND DILUTED	$ 1.38	$ 1.42	$ 4.06	$ 3.87
WEIGHTED-AVERAGE SHARES OUTSTANDING-BASIC AND DILUTED	89,627,718	87,459,533	89,202,399	86,268,415

MAIN STREET CAPITAL CORPORATION Consolidated Balance Sheets (in thousands, except per share amounts)

	September 30,	December 31,
	2025	2024
	(Unaudited)
ASSETS
Investments at fair value:
Control investments	$ 2,416,174	$ 2,087,890
Affiliate investments	892,914	846,798
Non–Control/Non–Affiliate investments	1,838,685	1,997,981
Total investments	5,147,773	4,932,669
Cash and cash equivalents	30,568	78,251
Interest and dividend receivable and other assets	90,110	98,084
Deferred financing costs, net	14,483	12,337
Total assets	$ 5,282,934	$ 5,121,341
LIABILITIES
Credit Facilities	$ 211,000	$ 384,000
July 2026 Notes (par: $500,000 as of both September 30, 2025 and December 31, 2024)	499,583	499,188
June 2027 Notes (par: $400,000 as of both September 30, 2025 and December 31, 2024)	399,497	399,282
August 2028 Notes (par: $350,000 as of September 30, 2025)	347,848	-
March 2029 Notes (par: $350,000 as of both September 30, 2025 and December 31, 2024)	347,541	347,002
SBIC debentures (par: $350,000 as of both September 30, 2025 and December 31, 2024)	344,299	343,417
December 2025 Notes (par: $150,000 as of December 31, 2024)	-	149,482
Accounts payable and other liabilities	61,949	69,631
Interest payable	18,573	23,290
Dividend payable	22,832	22,100
Deferred tax liability, net	95,237	86,111
Total liabilities	2,348,359	2,323,503
NET ASSETS
Common stock	895	884
Additional paid–in capital	2,451,987	2,394,492
Total undistributed earnings	481,693	402,462
Total net assets	2,934,575	2,797,838
Total liabilities and net assets	$ 5,282,934	$ 5,121,341
NET ASSET VALUE PER SHARE	$ 32.78	$ 31.65

MAIN STREET CAPITAL CORPORATION Reconciliation of Distributable Net Investment Income, Total Cash Expenses, Non-Cash Compensation Expenses and Cash Compensation Expenses (in thousands, except per share amounts) (Unaudited)

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2025	2024	2025	2024
Net investment income (4)	$ 86,538	$ 84,380	$ 260,618	$ 254,714
Non-cash compensation expenses (5)	6,167	5,377	17,350	14,927
Distributable net investment income (1)(4)	$ 92,705	$ 89,757	$ 277,968	$ 269,641
Excise tax expense	838	458	2,997	1,652
Federal and state and other tax expenses	2,139	2,758	9,044	8,340
Distributable net investment income before taxes (2)	$ 95,682	$ 92,973	$ 290,009	$ 279,633

Per share amounts:
Net investment income per share -
Basic and diluted (4)	$ 0.97	$ 0.96	$ 2.92	$ 2.95
Distributable net investment income per share -
Basic and diluted (1)(4)	$ 1.03	$ 1.03	$ 3.12	$ 3.13
Distributable net investment income before taxes per share -
Basic and diluted (2)	$ 1.07	$ 1.06	$ 3.25	$ 3.24

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2025	2024	2025	2024
Share–based compensation	$ (5,433)	$ (4,868)	$ (15,691)	$ (13,853)
Deferred compensation expense	(734)	(509)	(1,659)	(1,074)
Total non-cash compensation expenses (5)	(6,167)	(5,377)	(17,350)	(14,927)

Total expenses	(50,316)	(49,228)	(148,191)	(135,880)
Less non-cash compensation expenses (5)	6,167	5,377	17,350	14,927
Total cash expenses (5)	$ (44,149)	$ (43,851)	$ (130,841)	$ (120,953)

Compensation	$ (13,217)	$ (11,644)	$ (37,370)	$ (35,225)
Share-based compensation	(5,433)	(4,868)	(15,691)	(13,853)
Total compensation expenses	(18,650)	(16,512)	(53,061)	(49,078)
Non-cash compensation expenses (5)	6,167	5,377	17,350	14,927
Total cash compensation expenses (5)	$ (12,483)	$ (11,135)	$ (35,711)	$ (34,151)

MAIN STREET CAPITAL CORPORATION

Endnotes

(1)	DNII is NII as determined in accordance with U.S. Generally Accepted Accounting Principles, or U.S. GAAP, excluding the impact of non-cash compensation expenses⁽⁵⁾. Main Street believes presenting DNII and the related per share amount is useful and appropriate supplemental disclosure for analyzing its financial performance since non-cash compensation expenses⁽⁵⁾ do not result in a net cash impact to Main Street upon settlement. However, DNII is a non-U.S. GAAP measure and should not be considered as a replacement for NII or other earnings measures presented in accordance with U.S. GAAP and should be reviewed only in connection with such U.S. GAAP measures in analyzing Main Street's financial performance. A reconciliation of NII in accordance with U.S. GAAP to DNII is detailed in the financial tables included with this press release.

(2)	DNII before taxes is NII as determined in accordance with U.S. GAAP, excluding the impact of non-cash compensation expenses⁽⁵⁾ and any tax expenses included in NII. Main Street believes presenting DNII before taxes and the related per share amount is useful and appropriate supplemental disclosure for analyzing its financial performance, since non-cash compensation expenses⁽⁵⁾ do not result in a net cash impact to Main Street upon settlement, and since tax expenses included in NII may include excise tax expense, which is not solely attributable to NII, and deferred taxes, which are not payable in the current period. However, DNII before taxes is a non-U.S. GAAP measure and should not be considered as a replacement for NII, NII before taxes or other earnings measures presented in accordance with U.S. GAAP and should be reviewed only in connection with such U.S. GAAP measures in analyzing Main Street's financial performance. A reconciliation of NII in accordance with U.S. GAAP to DNII before taxes is detailed in the financial tables included with this press release.

(3)	Return on equity equals the net increase in net assets resulting from operations divided by the average quarterly total net assets.

(4)	NII and DNII for each period in 2024 and the first quarter of 2025 necessary to present the comparable year-to-date amounts for the nine months ended September 30, 2025 have been revised to include the impact of excise tax and NII related federal and state income and other tax expenses previously included within the total income tax provision. This correction was determined to be immaterial to any impacted prior periods and had no impact on net increases in net assets resulting from operations or the related per share amounts.

(5)	Non-cash compensation expenses consist of (i) share-based compensation and (ii) deferred compensation expense or benefit, both of which are non-cash in nature. Share-based compensation does not require settlement in cash. Deferred compensation expense or benefit does not result in a net cash impact to Main Street upon settlement. The appreciation (depreciation) in the fair value of deferred compensation plan assets is reflected in Main Street's Consolidated Statements of Operations as unrealized appreciation (depreciation) and an increase (decrease) in compensation expenses, respectively. Cash compensation expenses are total compensation expenses as determined in accordance with U.S. GAAP, less non-cash compensation expenses. Total cash expenses are total expenses, as determined in accordance with U.S. GAAP, excluding non-cash compensation expenses. Main Street believes presenting cash compensation expenses, non-cash compensation expenses and total cash expenses is useful and appropriate supplemental disclosure for analyzing its financial performance since non-cash compensation expenses do not result in a net cash impact to Main Street upon settlement. However, cash compensation expenses, non-cash compensation expenses and total cash expenses are non-U.S. GAAP measures and should not be considered as a replacement for compensation expenses, total expenses or other earnings measures presented in accordance with U.S. GAAP and should be reviewed only in connection with such U.S. GAAP measures in analyzing Main Street's financial performance. A reconciliation of compensation expenses and total expenses in accordance with U.S. GAAP to cash compensation expenses, non-cash compensation expenses and total cash expenses is detailed in the financial tables included with this press release.

(6)	Portfolio company financial information has not been independently verified by Main Street.

(7)	These credit statistics exclude portfolio companies on non-accrual status and portfolio companies for which EBITDA is not a meaningful metric.

Contacts:

Main Street Capital Corporation

Dwayne L. Hyzak, CEO, dhyzak@mainstcapital.com

Ryan R. Nelson, CFO, rnelson@mainstcapital.com

713-350-6000

Dennard Lascar Investor Relations

Ken Dennard / ken@dennardlascar.com

Zach Vaughan / zvaughan@dennardlascar.com

713-529-6600

View original content:https://www.prnewswire.com/news-releases/main-street-announces-third-quarter-2025-results-302607745.html

SOURCE Main Street Capital Corporation

MAIN STREET ANNOUNCES THIRD QUARTER 2025 RESULTS