Dave Dullum
Analyst · Janney Capital Markets
Thank you, David, and good morning, all. Just as a reminder, the business of Gladstone Investment is to invest in buyout transactions of businesses in the lower middle market. Our investments are primarily subordinated debt with equity and occasionally some senior debt. This combination produces a mix of assets in our portfolio which is key to our strategy. Our debt investments provide income to grow the dividends while we seek to build shareholder value through capital appreciation of the equity investments.
In this regard, at June 30, 2012, quarter end, our investment assets debt cost consisted of a mix of approximately $198 million or 72% in debt investments which produces income and about $78 million or 28% in equity securities which we expect will produce capital gains. This ratio of 72/28 is slightly higher in equity than our goal of 80/20 at cost. Of course, there are a number of factors at any time that affect this ratio, including loan payoffs and if there are any debt-to-equity conversions in our portfolio companies.
In the most recent quarter, our total interest-bearing debt portfolio had a 12.5% cash yield, up from 12% from the prior year quarter. This is our primary source for paying our dividends. Additionally, we often negotiate success fees as a component of our debt instruments. We recognize these success fees as income when we receive the cash. Success fees are contractually due upon a change of control or sale of a portfolio company and they're generally not recognized as income until received.
So during this most recent quarter, we received cash and reported success fee income of $400,000. Further, as of June 30, 2012, approximately 79% of our interest-bearing debt has success fees attached to that and is due to us with an average contractual rate accruing at 3.4% per annum. In total, this has created accrued success fees of approximately $8.1 million or about $0.37 per share, and although we do not have these success fees accrued on our balance sheet. Mainly, there is no guarantee that we will be able to collect all of our accrued success fees or knowing the timing of such collections due to this contingent nature.
As to the equity that we own in each business, while they are not producing cash income, we do expect them to appreciate and add value over time. As an example, since mid-2010 when we started taking some gains, we have realized capital gains of about $28.5 million through the stock ownership in various portfolio companies. So as we grow our portfolio, we will seek to increase interest income, obviously, to pay dividends, but also seek asset appreciation through growth in our equity value of the stocks we own.
We certainly believe this is reflected in our net asset value, or the book value per share, which has grown modestly over the last year from about $9.06 as of June 30, 2011, to about $9.10 as of June 30, 2012. And at the same time, we were able to increase the dividend payout rate by over 11% for that same period. So our primary goal is to grow our dividend shareholders while increasing the total asset value.
So how do we do this? Well, we generally obtain our investment opportunities by partnering with the management teams, private equity firms and other sponsors of buyouts. Our combination of debt and equity, we believe, gives us a competitive advantage in this arena because it provides 2 very important and necessary portions of the capital structure in a buyout transaction.
In addition, we may find opportunities to provide capital in support of business owners and the management teams who are not seeking to sell their company outright but perhaps to sell a portion of their company to us. In this case, we will invest in debt and in equity in exchange for a significant ownership in that business. And in other cases where the owners of the business have a need to strengthen their balance sheet for growth, we would invest in debt and equity for this purpose. We look upon this as, we call it, growth capital investing.
So our activity now over the last 4 months and since our March fiscal year end, we added 3 new buyouts to our portfolio. During the fiscal first quarter which ended June 30, we made 1 investment of $9.5 million in a company called Packerland Whey products. Packerland is a processor of raw fluid whey, which specializing in the production of protein supplements for dairy and beef cattle. Then in July, after the quarter end, we invested $22.5 million in a company called Ginsey Holdings, which is a designer and marketer of a broad line of branded juvenile and adult bathroom products.
In the next day or 2, we also expect to fund $21 million in a new portfolio company that is in the business of foam molding and fabricating for packaging, construction, and insulated shipping container applications. I will not mention the name here as we have not completed this, but will be done so in the next day or 2. Including this expected funding in the aggregate, we would be investing $35 million in debt and $18 million in equity in these 3 new buyouts, for a total of $53 million.
During the quarter, we invested $3.3 million in 4 of our existing portfolio companies and received $2.9 million in repayments. After the quarter end, we invested $2.6 million and received principle repayments of $500,000 from our existing portfolio companies. So as a result, at the end of the quarter we had $276 million invested in portfolio companies at cost. With additional activity after quarter end, we will have approximately $322 million invested in portfolio companies at cost.
We were able to maintain our dividend to stockholders for the quarter ended June 30, 2012, of $0.05 per month per common share, and our board also declared a dividend of $0.05 per month per common share through September of this year. We hope to continue the favorable dividend payouts for the foreseeable future.
As to the current portfolio, in general, the companies are performing, though not without challenges. We've experienced decreased valuations over the past few quarters, though for the past 12 months our portfolio valuations have increased by $2.4 million. This, frankly, is why we work very diligently through our investment management approach to really limit losses, continue to increase equity value and, most importantly, or as importantly, reserve the cash flow from these portfolio companies.
These activities, as I have mentioned in the past, include: one, strategic and business planning, and this is where we really work with outside resources to really assist the portfolio companies in continuing to review their competitive positioning and talent and among other key business metrics. Also, and most importantly, we will provide operating management support when necessary. We are able to tap experienced operating management talent from either our staff or from a pool of talent we have cultivated over the years.
This activity helps the portfolio companies streamline operations and evaluate add-on acquisitions when they come up. We also conduct conferences for the CEOs of our portfolio companies. This facilitates interaction between the portfolio company's management teams so they can exchange ideas such as best practices in purchasing, pricing, organizational help and manufacturing disciplines. We believe these activities to be extremely important, and not only for the competitive strength while adding value to our portfolio, but frankly it's helpful in maintaining the underlying value of our portfolio companies.
Regarding the opportunities that we see out there in the market for companies in the buyout area, we think these opportunities right now is pretty good in both quality and quantity. General economic conditions do create some uncertainty, obviously, but we continue to see improved stability and middle market companies returning to profitability. This improvement is causing an increase in the supply of quality businesses for sale as owners are taking advantage of these positive results.
Also, senior bank financing is available and reasonably priced, which accommodates leverage transactions, which of course is where we're involved. So as a result, we are finding opportunities where the valuations, in other words what we would look to pay for a company, relative to their trailing EBITDA or operating cash flow, at multiples that are around 5x to 6.5x for good companies. We also are seeing higher valuations, but these we've tended to avoid and will try to do so as we look at the risk versus return ratios.
So to keep our pipeline growing, we have stepped up our marketing and deal-generating activity. We've stressed our competitive advantage of being able to provide the subordinated debt and the equity to complete a transaction. However, we do continue to be cautious about the economy and are diligent in our pursuit of new investments.
We believe that our marketing efforts and presence in the marketplace should allow us to continue on a growth trend with additional new investments over the next year, somewhat demonstrated by the activity I mentioned at the beginning of the call. So our outlook for this fund is to maximize distributions to shareholders, which we've increased a total of 11% over the past 12 months, while achieving solid and good growth of both equity values and assets in the portfolio through the proprietary investments in the lower middle market company buyout arena.
With that, David, this concludes my part of the presentation.