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

[1]	Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments.
[2]	Middle Market portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Middle Market portfolio investments.
[3]	Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments.
[4]	The position is unfunded and no interest income is being earned as of March 31, 2024. The position may earn a nominal unused facility fee on committed amounts.
[5]	Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 93% of the loans (based on the par amount) contain LIBOR or Term SOFR (“SOFR”) floors which range between 0.50% and 5.25%, with a weighted-average floor of 1.21%.
[6]	Private Loan portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Private Loan portfolio investments.
[7]	Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 96% of these floating rate loans (based on the par amount) contain LIBOR or SOFR floors which range between 0.50% and 2.00%, with a weighted-average floor of 1.20%.
[8]	The position is unfunded and no interest income is being earned as of December 31, 2023. The position may earn a nominal unused facility fee on committed amounts
[9]	Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of March 31, 2024.
[10]	Non-accrual and non-income producing debt investment.
[11]	Non-accrual and non-income producing debt investment.
[12]	(33)Index based floating interest rate is subject to contractual maximum base rate of 3.00%.
[13]	Index based floating interest rate is subject to contractual maximum base rate of 3.00%.
[14]	Income producing through dividends or distributions.
[15]	Income producing through dividends or distributions.
[16]	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 SOFR+8.09% (Floor 1.50%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[17]	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 SOFR plus 8.00% (Floor 1.50%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[18]	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.
[19]	Portfolio company headquarters are located outside of the United States.
[20]	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.
[21]	Portfolio company headquarters are located outside of the United States.
[22]	Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.
[23]	Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.
[24]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.00% (Floor 2.00%). RLOC 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 December 31, 2023.
[25]	RLOC 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 March 31, 2024.
[26]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+8.00% (Floor 1.00%). RLOC 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 December 31, 2023.
[27]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+5.75% (Floor 1.00%). RLOC 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 December 31, 2023.
[28]	(34)Index based floating interest rate is subject to contractual maximum base rate of 1.50%.
[29]	Index based floating interest rate is subject to contractual maximum base rate of 1.50%.
[30]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.00% (Floor 1.50%). RLOC 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 December 31, 2023
[31]	Shares/Units represent ownership in a related Real Estate or HoldCo entity.
[32]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+6.75% (Floor 1.00%). RLOC 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 December 31, 2023.
[33]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+8.00% (Floor 2.00%). RLOC 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 December 31, 2023.
[34]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+10.00%. RLOC 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 December 31, 2023.
[35]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+6.00% (Floor 1.00%). RLOC 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 December 31, 2023.
[36]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.00% (Floor 1.00%). Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023.
[37]	Other Portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Other Portfolio investments.
[38]	Other Portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Other Portfolio investments.
[39]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.25% (Floor 1.00%). RLOC 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 December 31, 2023
[40]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+5.75% (1.00%). Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023.
[41]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+6.50% (Floor 2.00%). RLOC 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 December 31, 2023.
[42]	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 12.45% per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[43]	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 11.25% per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
[44]	Short-term portfolio investments. See Note C—Fair Value Hierarchy for Investments and Debentures—Portfolio Composition for a description of short-term portfolio investments. Short-term portfolio investments bear interest at index based floating interest rates which range from SOFR plus 2.75% to SOFR plus 4.00%, with SOFR floors which range from 0% to 0.75% (with a weighted average SOFR floor of approximately 0.39%) and resulting interest rates which range from 8.08% to 9.44% as of March 31, 2024, with a weighted-average interest rate of 8.68%.
[45]	(29)Shares/Units represent ownership in a related Real Estate or HoldCo entity.
[46]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+6.00% (0.75%). Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023.
[47]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.00% (Floor 1.00%). RLOC 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 December 31, 2023.
[48]	As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.25% (Floor 1.00%). Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023.