Dave Dullum
Analyst · Jefferies
Mike, thank you very much and good morning, everyone. I am pleased to report that during this quarter, which obviously ended 6/30/18, we were able to increase our net asset value from $10.85 at 3/31/18 to $11.57, and this was inclusive of during the quarter, where we made a purchase of one new portfolio company called Bassett Creek and we also exited an existing portfolio company, Drew Foam, at a significant realized gain for your fund. And we also were able to increase our net investment income, adjusted net investment income of $0.20 versus $0.21 in the last quarter.
So based on all these results and for the year ended 3/31/18 and as we look forward, we were able, in April, to announce an over 3% increase in our annual distribution rate to common stockholders from $0.78 a share to $0.80 a share. We also were able to announce a continuation of our semiannual supplemental distribution program, with a payment of $0.06 per common share, which is made in June of 2018. We hope and certainly expect that a significant portion of these supplemental distributions will be made from capital gains.
In addition, we have seen our stock price increase and in fact, also further quarter-over-quarter, such that the total return, which is inclusive of dividends for the June 2018 quarter was around 20%. And we're proud that our 1-year total return as of June 30, was around 36%, and this compares favorably to a BDC index put out by Wells Fargo, where that index actually was the decline of 2% versus our increase of 36% for the year.
So this increased stock price is encouraging to us because we believe that the investor community is recognizing the continuing growth of the income and the distribution and also frankly, the value of the equity component of our buyout business model and therefore, this -- we feel encouraged because it supports our thesis of what we're trying to do with your company.
Now we do have a differentiated investment strategy and a business model, in that our investments consist of the majority of equity and the debt capital in our buyouts. These companies generally have earnings before interest, taxes, depreciation and amortization or EBITDA, EBITDA as we call it, generally between $3 million and $20 million. And the structure we use for funding these buyouts consists of a direct equity investment for a significant ownership position, in combination with secured first or second lien debt in any one particular investment. And this definitely differentiates us from a traditional credit-oriented BDC, in that the proportion of equity to debt for the investments in our portfolio could be around 25-or-greater percent of equity to 75% debt at cost. And this compares to most other credit-oriented BDCs, where in their portfolios, you'll typically see around 10% equity and about 90% debt.
So therefore, the interest and the success fees that comes along with our debt investments provides steady income to pay, and over time, grow our monthly distributions, which as I mentioned earlier is currently at about $0.80 of common share annually. And then with the significant equity positions that we own in each portfolio company, we look for increasing value so that an increase in the equity value will provide capital gains and other income over the life of the investment or upon exit.
These potential capital gains and other income may then be distributed to our stockholders in the form of these supplemental distributions. And to this point, we've made 3 such planned supplemental distributions in the amount of $0.06 per share to common stockholders in June and December 2017, and then recently, in June of this year, 2018.
This differentiated investment approach of being a provider of a significant portion of the equity, using the majority and most of the debt in our transactions gives us an advantage to typical lenders and credit-oriented BDCs in that we will have a close working relationship with the management teams and some influence frankly, on the direction and strategy of the company that we buy. Thus, we not only limit the risk of our debt being refinanced, but also our involvement with management provides an interaction with the company, somewhat similar to the traditional private equity fund. This is very important feature of our approach to investing.
Now let us have a quick look at our historical performance or our scorecard. We've done this before. And I'd like you to keep it up-to-date on this and so from 3/31/2014 to 6/30/2018, we'll take a look at how we've done. I mentioned also that you will find most of the information, I'm going to be talking about in a graphic form -- in our quarterly investor presentation, which is posted on our website, which as Mike LiCalsi mentioned earlier, you can get to on www.gladstoneinvestment.com.
So what have we done since 2014 and so on? Well, we've grown our total assets from about $331 million to about $641 million at fair value. The debt portion at cost has grown from about $279 million to almost $442 million, which is what supports the growth in our regular monthly distributions per common share, which went from $0.66 per share in fiscal 2014 to $0.80 per share annual run rate since April of 2018.
The equity portion at cost of our portfolio has grown from about $105 million to about $155 million. Our NAV, net asset value, per share has increased from $8.34 per share to $11.57 over that same period.
We had 33 companies in our portfolio at 6/30/18. From inception in 2005 through this period in 6/30/18, we've actually exited 13 of our buyout companies and these exits have actually generated almost $100 million in net realized gains and about $22 million in other income on exit. These exits achieved an aggregate cash-on-cash return on the exit of the equity portion of those investments of approximately 3.4x, which is somewhat our target. It is this equity growth and the exit activity that's allowed us to deliver on our objective of generating capital gains from the equity portion of our assets, which is, of course, what we look forward to continue in the future.
So going forward, as we build our investment portfolio with new buyouts, we also will manage these exits or sales of portfolio companies and that's consistent with our strategy of providing realized capital gains from the equity portion of our portfolio. And to this point, as I mentioned, we exited a company called Drew Foam in June of 2018, which generated a capital gain for us of about $13.8 million.
As I always say, we will continue to be guided by market conditions, meaning we'll assess the risk return and continue to hold an investment versus the opportunity to exit it and will remain sensitive to preserving our portfolio of assets because this is what produces the income for our monthly distributions.
So if we exit, we also have obviously to make new investments, and it's our new buyout generation activities also have a very high priority. To develop new investment opportunities as I mentioned previously, we call on a number of different groups of folks, independent sponsors, middle-market investment banking firms and other sources that help to create the investment opportunities that we look at, a number of which are somewhat proprietary.
Generally, our investments in some can include partnering with the management team in the course of the business. But we also believe that our strict adherence to the investment fundamentals and our thorough due diligence process have enabled us to provide shareholder returns in both our consistent regular monthly distributions as well as the supplemental distributions that we've been able to make.
In this regard, this quarter, we invested about $29 million to form a group called Bassett Creek Restoration, Inc., which is actually an acquisition platform for businesses in the restoration and renovation services space. This we simultaneously acquired a company called J.R. Johnson as the first operating business in that platform. So we continue reviewing and conducting due diligence on a number of new potential investments, and in addition, we'll -- to these new standalone acquisitions, we are actively pursuing accretive add-on investments for some of our existing portfolio companies. This allows us to, from time to time, also make further investments in some of these existing portfolio companies, so it continues building assets, while accelerating the value creation of these companies that we already own.
Now I will say that we're still operating in a buyout environment, where the competition for new investments is elevated, purchase price is being paid very high and frankly, this makes it very challenging for us to close new investments, given our conservative value approach and the expected financial returns. Now this may lead to an appearance of a low rate of investment production at any point in time, however, keep in mind that when we make investments, we're striving for quality to build value in both the income and equity, and we're not volume driven as it might be if we were building a portfolio of loans, where we would, say, be primarily sensitive to yield spreads. And it's important to keep in mind that our process time line for any one acquisition is quite long. And from the time we're introduced to a new potential buyout opportunity to actually closing on that transaction, it could be anywhere from 3 to 5 months. So it takes time, but we keep diligently working at this and building our portfolio.
We continue our target for equity investments to provide a minimum of 2 to 3x cash-on-cash return and the debt investments, which are generally secured and primarily first lien loans typically carry a cash yield in the low to mid-teens. And it's again these debt cash returns that balance the equity portion of our investment, producing a blended current cash yield, which is what supports our stockholder distribution expectations.
So what's our investment focus? Well, we continue to seek investments in companies with consistent EBITDA, EBITDA and operating cash flow, with a potential to expand into these areas of interest continue to be light, specialty manufacturing, specialty consumer products and services, industrial products and services, from time to time, maybe aerospace and also energy in limited circumstances.
So as we look forward, we will continue executing on our plan. We will be adding accretive investments to grow both the income-generating portion and the equity portion of our assets, while we position our portfolio for potential exits, which increases and maximizes distribution to stockholders. We anticipate paying the semiannual supplemental distributions as the portfolio continues to mature and we are able to manage exits and realize capital gains. As I mentioned, these distributions are generally expected to be made from undistributed net capital gains and undistributed net investment income.
So with all of that, I'll turn it over to our CFO, Julia Ryan, and she can give a little more detail on the actual financial performance for this past quarter. Julia?