Main Street Capital Corporation Quarterly report pursuant to Section 13 or 15(d)

[1]	Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments.
[2]	A majority of the variable rate loans in the Company’s investment portfolio bear interest at a rate that may be determined by reference to either LIBOR (“L”), SOFR (“SF”) or an alternate Base Rate (commonly based on the Federal Funds Rate or the Prime Rate (“P”)), which typically resets every one, three, or six months at the borrower’s option. SOFR based contracts may include a credit spread adjustment (the “Adjustment”) that is charged in addition to the stated spread. The Adjustment is applied when the SOFR rate, plus the Adjustment, exceeds the stated floor rate, as applicable. As of September 30, 2022, SOFR based contracts in the portfolio had Adjustments ranging from 0.10% to 0.26%.
[3]	Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 70% of the loans (based on the par amount) contain LIBOR or Term SOFR (“SOFR”) floors which range between 0.50% and 2.00%, with a weighted-average floor of 1.06%.
[4]	The position is unfunded and no interest income is being earned as of September 30, 2022. The position may earn a nominal unused facility fee on committed amounts.
[5]	Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments.
[6]	Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 67% of the loans (based on the par amount) contain LIBOR floors which range between 0.50% and 2.00%, with a weighted-average LIBOR floor of 1.06%.
[7]	Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments.
[8]	Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments.
[9]	Non-accrual and non-income producing investment.
[10]	Non-accrual and non-income producing investment.
[11]	Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.
[12]	The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of Prime plus 5.10% (Floor 2.00%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[13]	The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of LIBOR plus 7.25% (Floor 1.25%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[14]	Income producing through dividends or distributions.
[15]	Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.
[16]	Shares/Units represent ownership in a related Real Estate or HoldCo entity.
[17]	Income producing through dividends or distributions.
[18]	Shares/Units represent ownership in a related Real Estate or HoldCo entity.
[19]	The security has an effective contractual interest rate of 2.00% PIK + LIBOR+6.50%, Floor 1.00%, but the issuer may, in its discretion, elect to pay the PIK interest in cash. The rate presented represents the effective current yield based on actual payments received during the period.
[20]	The security has an effective contractual interest rate of 2.00% PIK + LIBOR+6.50%, Floor 1.00%, but the issuer may, in its discretion, elect to pay the PIK interest in cash. The rate presented represents the effective current yield based on actual payments received during the period.
[21]	As of September 30, 2022, borrowings under the loan facility bore interest at SOFR+6.25% (Floor 1.00%). Due to an amendment and subsequent funding during the quarter, the term loan facility has different floating rate reset dates. The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2022.
[22]	The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of LIBOR plus 7.96% (Floor 1.00%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[23]	Index based floating interest rate is subject to contractual maximum index rate of 1.50% as of September 30, 2022.
[24]	Index based floating interest rate is subject to contractual maximum index rate of 1.50% as of December 31, 2021.
[25]	Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets.
[26]	Portfolio company headquarters are located outside of the United States.
[27]	Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets.
[28]	Portfolio company headquarters are located outside of the United States.
[29]	As of December 31, 2021, borrowings under the loan facility bore interest at LIBOR+6.00% or Prime+5.00%. Delayed draw term loan facility permits the borrower to make an interest rate election on each new tranche of borrowings under the facility. The rate presented represents a weighted-average rate for borrowings under the facility.
[30]	As of September 30, 2022, borrowings under the loan facility bore interest at LIBOR+6.50% PIK or Prime+5.50% PIK. Revolving facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2022.
[31]	As of September 30, 2022, borrowings under the loan facility bore interest at SOFR+6.00% (Floor 1.00%) . Delayed draw term loan facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2022.
[32]	Other Portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Other Portfolio investments.
[33]	Portfolio company is in a bankruptcy process and, as such, the maturity date of our debt investment in this portfolio company will not be finally determined until such process is complete. As noted in footnote (14), our debt investment in this portfolio company is on non-accrual status.
[34]	Portfolio company is in a bankruptcy process and, as such, the maturity date of our debt investment in this portfolio company will not be finally determined until such process is complete. As noted in footnote (14), our debt investment in this portfolio company is on non-accrual status.
[35]	In connection with the Company's debt investment in Staples Canada ULC and in an attempt to mitigate any potential adverse change in foreign exchange rates during the term of the Company’s investment, the Company maintains a forward foreign currency contract with Cadence Bank to lend $17.6 million Canadian Dollars and receive $13.6 million U.S. Dollars with a settlement date of September 14, 2023. The unrealized appreciation on the forward foreign currency contract was $0.8 million as of September 30, 2022.
[36]	In connection with the Company's debt investment in Staples Canada ULC and in an attempt to mitigate any potential adverse change in foreign exchange rates during the term of the Company's investment, the Company maintains a forward foreign currency contract with Cadence Bank to lend $21.4 million Canadian Dollars and receive $16.9 million U.S. Dollars with a settlement date of September 14, 2022. The unrealized depreciation on the forward foreign currency contract was not significant as of December 31, 2021.
[37]	Short-term portfolio investments. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of short-term portfolio investments.
[38]	Short-term portfolio investments. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of short-term portfolio investments.
[39]	As of September 30, 2022, borrowings under the loan facility bore interest at SOFR+7.25% (Floor 1.00%). Each new draw on the delayed draw term loan facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2022.