Organization	12 Months Ended
Sep. 30, 2022
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization	1. ORGANIZATION PennantPark Investment Corporation was organized as a Maryland corporation in January 2007. We are a closed-end, externally managed, non-diversified investment company that has elected to be treated as a BDC under the 1940 Act. Our investment objective is to generate both current income and capital appreciation while seeking to preserve capital through debt and equity investments. We invest primarily in U.S. middle-market companies in the form of first lien secured debt, second lien secured debt, subordinated debt and, to a lesser extent, equity investments. On April 24, 2007, we closed our initial public offering. On April 14, 2022, listing and trading of the Company's common stock commenced on the New York Stock Exchange after the Company voluntarily withdrew the principal listing of its common stock from the Nasdaq Stock Market LLC effective at market close on April 13, 2022. Our common stock trades on the New York Stock Exchange under the symbol “PNNT.” We have entered into an investment management agreement, or the Investment Management Agreement with the Investment Adviser, an external adviser that manages our day-to-day operations. PennantPark Investment, through the Investment Adviser, manages the day-to-day operations of and provides investment advisory services to SBIC II under a separate investment management agreement. We have also entered into an administration agreement, or the Administration Agreement with the Administrator, which provides the administrative services necessary for us to operate. PennantPark Investment, through the Administrator, also provides similar services to SBIC II under a separate administration agreement. See Note 3. SBIC II, our wholly-owned subsidiary, was organized as a Delaware limited partnership in 2012. SBIC II received a license from the SBA to operate as a SBIC under Section 301(c) of the 1958 Act. SBIC II’s objectives are to generate both current income and capital appreciation through debt and equity investments generally by investing with us in SBA-eligible businesses that meet the investment selection criteria used by PennantPark Investment. On July 31, 2020, we and certain entities and managed accounts of the private credit investment manager of Pantheon Ventures (UK) LLP (“Pantheon”) entered into a limited liability company agreement to co-manage PSLF, a newly-formed unconsolidated joint venture. In connection with this transaction, we contributed in-kind our formerly wholly-owned subsidiary, Funding I. As a result of this transaction, Funding I became a wholly-owned subsidiary of PSLF and has been deconsolidated from our financial statements. PSLF invests primarily in middle-market and other corporate debt securities consistent with our strategy. PSLF was formed as a Delaware limited liability company. See Note 4. In April 2021, we issued $150.0 million in aggregate principal amount of our 2026 Notes at a public offering price per note of 99.4%. Interest on the 2026 Notes is paid semi-annually on May 1 and November 1 of each year, at a rate of 4.50% per year, commencing November 1, 2021. The 2026 Notes mature on May 1, 2026 and may be redeemed in whole or in part at our option subject to a make-whole premium if redeemed more than three months prior to maturity. The 2026 Notes are general, unsecured obligations and rank equal in right of payment with all of our existing and future senior unsecured indebtedness. The 2026 Notes are effectively subordinated to all of our existing and future secured indebtedness to the extent of the value of the assets securing such indebtedness and structurally subordinated to all existing and future indebtedness and other obligations of any of our subsidiaries, financing vehicles, or similar facilities. We do not intend to list the 2026 Notes on any securities exchange or automated dealer quotation system. In October 2021, we issued $165.0 million in aggregate principal amount of our 2026 Notes-2 at a public offering price per note of 99.436%. Interest on the 2026 Notes is paid semi-annually on May 1 and November 1 of each year, at a rate of 4.00% per year, commencing May 1, 2022. The 2026 Notes-2 mature on November 1, 2026 and may be redeemed in whole or in part at our option subject to a make-whole premium if redeemed more than three months prior to maturity. The 2026 Notes-2 are general, unsecured obligations and rank equal in right of payment with all of our existing and future senior unsecured indebtedness. The 2026 Notes-2 are effectively subordinated to all of our existing and future secured indebtedness to the extent of the value of the assets securing such indebtedness and structurally subordinated to all existing and future indebtedness and other obligations of any of our subsidiaries, financing vehicles, or similar facilities. We do not intend to list the 2026 Notes-2 on any securities exchange or automated dealer quotation system. We have formed the Taxable Subsidiary, which is subject to tax as a corporation. The Taxable Subsidiary allows us to hold equity securities of certain portfolio companies treated as pass-through entities for federal income tax purposes while facilitating our ability to qualify as a RIC under the Code. In January 2022, we funded PennantPark-TSO Senior Loan Fund II LP, ("PTSF II"), an unconsolidated limited partnership, organized as a Delaware limited liability partnership. We sold $82.3 million in investments to a wholly-owned subsidiary of PTSF II in exchange for cash in the amount of $75.7 million and an $6.6 million equity interest in PTSF II representing 23.1% of the total outstanding Class A Units of PTSF II. We recognized $0.2 million of realized gain upon the formation of PTSF II. As of September 30, 2022, our capital commitment of $15.0 million is 100% funded and we hold 23.1% of the total outstanding Class A Units of PTSF II and a 4.99% voting interest in the general partner which manages PTSF II. We are operated by a person who has claimed an exclusion from the definition of the term “commodity pool operator” under the Commodity Exchange Act and the Investment Adviser intends to continue to affirm the exclusion on an annual basis, and therefore, is not subject to registration or regulation as a commodity pool operator under the Commodity Exchange Act.

Organization

12 Months Ended

Sep. 30, 2022

Organization Consolidation And Presentation Of Financial Statements [Abstract]

1. ORGANIZATION

PennantPark Investment Corporation was organized as a Maryland corporation in January 2007. We are a closed-end, externally managed, non-diversified investment company that has elected to be treated as a BDC under the 1940 Act. Our investment objective is to generate both current income and capital appreciation while seeking to preserve capital through debt and equity investments. We invest primarily in U.S. middle-market companies in the form of first lien secured debt, second lien secured debt, subordinated debt and, to a lesser extent, equity investments. On April 24, 2007, we closed our initial public offering. On April 14, 2022, listing and trading of the Company's common stock commenced on the New York Stock Exchange after the Company voluntarily withdrew the principal listing of its common stock from the Nasdaq Stock Market LLC effective at market close on April 13, 2022. Our common stock trades on the New York Stock Exchange under the symbol “PNNT.”

We have entered into an investment management agreement, or the Investment Management Agreement with the Investment Adviser, an external adviser that manages our day-to-day operations. PennantPark Investment, through the Investment Adviser, manages the day-to-day operations of and provides investment advisory services to SBIC II under a separate investment management agreement. We have also entered into an administration agreement, or the Administration Agreement with the Administrator, which provides the administrative services necessary for us to operate. PennantPark Investment, through the Administrator, also provides similar services to SBIC II under a separate administration agreement. See Note 3.

SBIC II, our wholly-owned subsidiary, was organized as a Delaware limited partnership in 2012. SBIC II received a license from the SBA to operate as a SBIC under Section 301(c) of the 1958 Act. SBIC II’s objectives are to generate both current income and capital appreciation through debt and equity investments generally by investing with us in SBA-eligible businesses that meet the investment selection criteria used by PennantPark Investment.

On July 31, 2020, we and certain entities and managed accounts of the private credit investment manager of Pantheon Ventures (UK) LLP (“Pantheon”) entered into a limited liability company agreement to co-manage PSLF, a newly-formed unconsolidated joint venture. In connection with this transaction, we contributed in-kind our formerly wholly-owned subsidiary, Funding I. As a result of this transaction, Funding I became a wholly-owned subsidiary of PSLF and has been deconsolidated from our financial statements. PSLF invests primarily in middle-market and other corporate debt securities consistent with our strategy. PSLF was formed as a Delaware limited liability company. See Note 4.

In April 2021, we issued $150.0 million in aggregate principal amount of our 2026 Notes at a public offering price per note of 99.4%. Interest on the 2026 Notes is

paid semi-annually on May 1 and November 1 of each year, at a rate of 4.50% per year, commencing November 1, 2021. The 2026 Notes mature on May 1, 2026 and may be redeemed in whole or in part at our option subject to a make-whole premium if redeemed more than three months prior to maturity. The 2026 Notes are general, unsecured obligations and rank equal in right of payment with all of our existing and future senior unsecured indebtedness. The 2026 Notes are effectively subordinated to all of our existing and future secured indebtedness to the extent of the value of the assets securing such indebtedness and structurally subordinated to all existing and future indebtedness and other obligations of any of our subsidiaries, financing vehicles, or similar facilities. We do not intend to list the 2026 Notes on any securities exchange or automated dealer quotation system.

In October 2021, we issued $165.0 million in aggregate principal amount of our 2026 Notes-2 at a public offering price per note of 99.436%. Interest on the 2026 Notes is paid semi-annually on May 1 and November 1 of each year, at a rate of 4.00% per year, commencing May 1, 2022. The 2026 Notes-2 mature on November 1, 2026 and may be redeemed in whole or in part at our option subject to a make-whole premium if redeemed more than three months prior to maturity. The 2026 Notes-2 are general, unsecured obligations and rank equal in right of payment with all of our existing and future senior unsecured indebtedness. The 2026 Notes-2 are effectively subordinated to all of our existing and future secured indebtedness to the extent of the value of the assets securing such indebtedness and structurally subordinated to all existing and future indebtedness and other obligations of any of our subsidiaries, financing vehicles, or similar facilities. We do not intend to list the 2026 Notes-2 on any securities exchange or automated dealer quotation system.

We have formed the Taxable Subsidiary, which is subject to tax as a corporation. The Taxable Subsidiary allows us to hold equity securities of certain portfolio companies treated as pass-through entities for federal income tax purposes while facilitating our ability to qualify as a RIC under the Code.

In January 2022, we funded PennantPark-TSO Senior Loan Fund II LP, ("PTSF II"), an unconsolidated limited partnership, organized as a Delaware limited liability partnership. We sold $82.3 million in investments to a wholly-owned subsidiary of PTSF II in exchange for cash in the amount of $75.7 million and an $6.6 million equity interest in PTSF II representing 23.1% of the total outstanding Class A Units of PTSF II. We recognized $0.2 million of realized gain upon the formation of PTSF II. As of September 30, 2022, our capital commitment of $15.0 million is 100% funded and we hold 23.1% of the total outstanding Class A Units of PTSF II and a 4.99% voting interest in the general partner which manages PTSF II.

We are operated by a person who has claimed an exclusion from the definition of the term “commodity pool operator” under the Commodity Exchange Act and the Investment Adviser intends to continue to affirm the exclusion on an annual basis, and therefore, is not subject to registration or regulation as a commodity pool operator under the Commodity Exchange Act.