As of September 30, 2019, the fair value of the investment portfolio was $1.4 billion and was comprised of investments in 104 companies. These included debt investments in 79 companies, equity investments in 33 companies, including our limited partnership interests in two private equity funds, and our investment in Senior Loan Fund JV I, LLC (“SLF JV I”). Nine of the equity investments were in companies in which the Company also had a debt investment.
As of September 30, 2019, 91.0% of the Company’s portfolio as of September 30, 2019 consisted of debt investments, including 53.5% of first liens, 25.1% of second liens and 12.4% of unsecured debt investments, including the debt investments in SLF JV I at fair value.
As of September 30, 2019, there were three investments on which the Company had stopped accruing cash and/or PIK interest or OID income that, in the aggregate, represented 4.3% of the Company’s debt portfolio at cost and 0.2% at fair value. During the three months ended September 30, 2019, the Company removed two investments fromnon-accrual status in connection with an exit and restructuring.
As of September 30, 2019, SLF JV I had $360.9 million in assets, including senior secured loans to 51 portfolio companies. The joint venture generated income of $2.3 million for the Company during the quarter ended September 30, 2019. As of September 30, 2019, SLF JV I had $79.8 million of undrawn capacity on its senior revolving credit facility.
Over time, the Company intends to rotate out of the remaining investments it has identified asnon-core investments, which is approximately $200 million at fair value as of September 30, 2019. It will also seek to redeploynon-income generating investments comprised of equity investments, limited partnership interests and loans currently onnon-accrual status into proprietary investments with higher yields. Certain additional information on such categorization and the portfolio composition is included in investor presentations that the Company files with the Securities and Exchange Commission (“SEC”).
Liquidity and Capital Resources
As of September 30, 2019, the Company had $15.4 million of cash and cash equivalents, total principal value of debt outstanding of $476.1 million and $385.2 million of undrawn capacity on its credit facility, subject to borrowing base and other limitations. The weighted average interest rate on debt outstanding was 4.8% and 5.1% as of September 30, 2019 and June 30, 2019, respectively.
The Company’s total leverage ratio was 0.51x and 0.58xdebt-to-equity as of September 30, 2019 and June 30, 2019, respectively.
Non-GAAP Financial Measures
Adjusted Net Investment Income
On a supplemental basis, the Company is disclosing adjusted net investment income and per share adjusted net investment income, each of which is a financial measure that is calculated and presented on a basis of methodology other than in accordance with U.S. GAAP(“non-GAAP”). Adjusted net investment income represents net investment income, excluding capital gains incentive fees (“Part II incentive fee”). The Company’s management uses thisnon-GAAP financial measure internally to analyze and evaluate financial results and performance and believes that thisnon-GAAP financial measure is
4