We expect volumes to remain strong in 2025 as the M&A pipeline expands. Our goal is to drive performance with a consistent approach to direct lending anchored in disciplined credit selection and conservative portfolio management. We continue to benefit from the OneCarlyle platform, which differentiates us in the core middle market. Turning to the quarterly highlights beginning on slide seven.
In spite of a complex market backdrop, CSL III again delivered a positive 2.3% return in the quarter, driven by meaningful cash income from the portfolio. In Q3, we deployed $38 million across new and existing borrowers, while experiencing $20 million in sales and repayments during the quarter. Our portfolio as of September 30th had a fair value of $386 million.
We initiated a capital call during Q3, so total equity called since inception increased to $246 million, or 85% of committed capital as of September 2024. We declared a third quarter dividend of $0.80 per share, consisting of our base dividend of $0.60 plus a $0.20 supplemental dividend. This supplemental dividend comprises cumulative income earned in excess of the previously declared quarterly dividends.
Going forward, we expect to declare two additional supplemental dividends prior to the close of the merger with CGBD to pay out all undistributed income to CSL III shareholders. The Q3 base dividend of $0.60 represents an 11.2% annualized yield. We are confident we will continue to deliver strong performance for shareholders and remain committed to delivering a resilient, stable cash flow stream to our investors through consistent income and solid credit performance.
You can see our portfolio composition on slide eight, which we expect will evolve as we continue to ramp the portfolio. However, while the asset mix will continue to diversify, we will stick to our through cycle investment approach and conservative portfolio construction focused on primarily making investments to U.S. companies backed by high quality sponsors in the middle market. At the end of the third quarter, the median EBITDA across our portfolio was $89 million.
The portfolio is comprised of 108 investments in 81 companies across over 20 industries. 99% of our debt investments are in senior secured loans, and just under 100% of our debt investments are floating rate, so we feel very well positioned in the current environment. On last quarter’s earnings call, we announced the merger between CGBD and Carlyle Secured Lending III.
I’d like to report that the merger remains on track to close by the end of the first quarter of 2025, subject to approval from CGBD stockholders and satisfaction or waiver of other customary closing conditions. We continue to have high conviction in the strategic benefits the transaction will provide to both CSL III and CGBD shareholders, including an increase in scale and liquidity, a reduction in costs from operational efficiencies and accretion to both earnings and NAV per share.
With that, I’d now like to turn the call over to Tom.
Tom Hennigan:
Thanks, Justin. Today I’ll discuss our third quarter financial results and portfolio performance in a bit more detail, and then I’ll finish with our financing facilities and liquidity. Moving on to review of our third quarter financial results, we had another solid quarter of earnings. Total investment income for the third quarter was $12.5 million. That’s up 5% from the prior quarter as we continued to ramp the portfolio. Total net expenses were in line with the prior quarter at $5.3 million, and that resulted in net investment income for the quarter of about $7.2 million, or $0.62 per share. And for Q3, we declared total dividends of $0.80 per share. That’s comprised of the base dividend of $0.60 per share and the supplemental dividend of $0.20 per share. And that base dividend represents an 11.2% yield on average NAV during the quarter. And that’s in line with that 10% plus dividend yield we’ve been paying out almost every quarter since the inception of the fund.