Amit Muni
Analyst · Citigroup
Thank you, Jono, and good morning, everyone. I'd like to begin by first reviewing our overall financial results. The record net inflows we experienced in the quarter, together with positive market movement, helped us to achieve a record quarter. Total revenues in the first quarter are $19.2 million, which is up 32% from the first quarter of last year and 19% from the fourth quarter.
Our total expenses on a GAAP basis were $18.1 million in the first quarter, which was up 26% from the year-ago quarter and 18% sequentially. On an adjusted basis, excluding the cost related to our patent litigation, ETF shareholder proxy and initial exchange listing fees, our pro forma operating expenses were $17.4 million, which was up 14% from the first quarter of last year and 24% on the fourth quarter. Our GAAP net income was $1.1 million and our pro forma operating net income was up 78% to a record $1.9 million.
You can see the attractiveness of the platform in our business model. Compared to the fourth quarter, revenues are up 19%, operating expenses up only 14% and our operating net income is up 78%. I'll go through the main drivers of our revenues and expenses in a few moments, but I first wanted to review our key margin metrics on the next slide, which also reflects the attractiveness of the business model. Our gross margin, which is our total revenues less fund related and third party sharing expenses was 63% in the first quarter. That is up from the fourth quarter due to the change in mix of our assets and lower expenses for our joint venture with the Bank of New York Mellon for our currency and fixed-income ETFs. As we continue to gain scale and grow our assets, I would expect to see continued improvement in this gross margin going forward.
Our pretax operating margins are also growing as we are gaining scale. Pretax operating margins were 10%, which is within the guidance we have given investors. Our business model is benefiting from the positive market environment, which is reflected in our growing margins. With rising AUM, I would expect continued improvement in these margins. To remind investors, we have given operating margin targets up 10% in this average $15 billion AUM range, 20% in the $20 billion range and reaching among the highest levels of the traditional asset managers once we get closer to $40 billion in average assets under management.
Now I'd like to review our revenues on the next slide. Our ETF revenues reached a record $19 million in the first quarter. This was up from $14.3 million in the first quarter of last year and $16 million from the fourth quarter due to higher average assets under management from our strong inflows and positive market movement. Our average advisory fee was 54 basis points in the first quarter, which was unchanged from the fourth quarter but down from 56 basis points in the first quarter of last year due to change in mix of our assets. You can see from the dark blue in the charts that the robust growth we experienced in equities contributed significantly to the growth in revenues, which you can see in more detail on the next slide.
With the exception of our currency ETFs, all categories experienced revenue growth compared to the first and fourth quarters of last year. In particular, as you can see in the blue and green portions of the graph, the record flows we experienced in our dividend-based emerging market equity and U.S. ETFs contributed the majority of our revenue increase. So our diversification strategy is working in that we have product that should grow in different market cycles and we are continuing our product development activities to build upon this strategy.
Now I'd like to review our expenses on the next group of slides. First, I'd like to go through the changes in our expenses at a high level compared to the fourth quarter. After adjusting for litigation costs, our operating expenses grew by $2.2 million from $15.1 million in the fourth quarter to $17.3 million in the first quarter, primarily from 5 major items.
First, the growth in our assets under management increased in variable costs associated with operating our funds, which increase expenses by $692,000. All this increase is obviously fully offset by the nearly $3 million in additional ETF revenues we earned.
Second, we had seasonal expenses related to payroll taxes from 2011 year-end bonus payments, which are made in February. Third, we incurred a onetime charge of $384,000 related to terminating our relationship with Advisors Asset Management. You'll remember in 2010, we entered into an arrangement with AAM where they would market our ETFs in the independent broker-dealer channel. We felt this was a cost effective way for us to market into a fragmented channel that we had not historically focused on. After reviewing the relationship after a year, we felt we could better market into this channel cost effectively now with our expanded sales force. So we have this onetime charge based on the assets AAM had raised.
Fourth, we had an increase in stock-based compensation due to new equity awards granted to employees as part of year end compensation. And lastly, we incurred $316,000 in payroll taxes for options exercised in our secondary offering. I don't believe we will have such a high expense in the near future for option exercises, so this is another onetime item. Those are the main drivers that get us to the $17.3 million in expenses in the first quarter.
On the next slide, we go into a little more detail on the expense line changes compared to the fourth quarter. As you can see on the chart on the top left corner of this slide, compensation costs increased 24% from the fourth quarter due to the payroll tax and stock-based compensation items I spoke about. We have 64 employees today. Bunk cost increased 11% compared to the fourth quarter, due to higher average assets under management. Marketing cost increased 7% from the fourth quarter as we increase our level of television and online advertising to support our growth.
Sales cost decreased 13% from the fourth quarter due to lower product development related expenses. Professional fees were flat compared to the fourth quarter, as higher legal and auditing costs, as a result of becoming an exchange listed company, were offset by lower business consulting expenses. Third party fees increased 43% primarily due to the onetime termination charge for AAM I discussed, as well as lower expenses for our currency and fixed-income joint venture with the Bank of New York. You'll remember that, for a period of 5 years, we agreed to share the revenues and any third-party costs for our currency and fixed income products. You can see from the chart on the right that as a percent of our revenues, our expenses are continuing to decline as we gain operating scale in our business. This trend should continue with rising assets subject to some seasonal quarterly fluctuations.
Along with our strong financial results, our balance sheet and cash liquidity continues to improve, as you can see on the next slide. We have total assets of $51 million at March 31, which is primarily comprised of $32 million of cash and cash equivalents, $10 million in investments and $7 million in receivables from the WisdomTree Funds. We have no debt. On the top right-hand side of this slide, I want to walk you through the major changes in our cash and liquidity. Our cash increased by $6.5 million this quarter primarily from the net proceeds of $4.3 million from the secondary offering, $2.6 million from our operating activities due to our strong results, $1.6 million from the exercise of options, partly offset by $1 million used to repurchase shares from our employees for payroll taxes for the investing in restricted stock, and $1.1 million used to purchase investments with our free cash. If you add our investments and receivables from the WisdomTree Funds, lesser liabilities resulted in nearly $32 million in liquidity for us.
We have 121 million common shares outstanding and 139 million shares in total when you include our options and restricted stock. We also have a net operating loss carryforward of approximately 50 million.
Now I'd like to update you on 2 items. The first relates to our ETF shareholder proxy solicitation. As we have previously disclosed, we have commenced a proxy solicitation of the WisdomTree ETF shareholders. We are doing this because, under the Investment Company Act, our investment advisory agreements with the WisdomTree ETFs could be automatically terminated if Michael Steinhardt's ownership in our company falls below 25%. When this occurs, we are required to obtain the approval of the ETF shareholders to continue as an investment advisor and earn our revenues. Since Michael currently owns 25.5% of our company, it makes sense for us to start this process now since he'll likely fall below that 25% level if he were to sell or donate any of his WisdomTree shares, or if we were to issue shares in the future. Since we are already started the proxy solicitation, we decided to also seek removal to change subadvisors if needed. If we obtain this approval now, we'll be better positioned to change subadvisors with minimal cost in the future. And lastly, we're asking for approval to make the fee structure of 3 of our ETFs consistent with our other ETFs.
We are increasing our estimated cost from our previous guidance to $2.5 million to $3.5 million, which will be incurred primarily over the second and third quarters. We will do everything we can to manage this cost. Second, I wanted to give you an update on our patent litigation. As we previously reported, last December, Research Affiliates commenced a lawsuit against us alleging that the fundamentally weighted investment methodology we used for our equity indexes infringes on 3 of their patents. We continue to believe we have strong defenses in this lawsuit and we have filed a motion to dismiss the case. No material events have happened since we last spoke in January and we are awaiting the court's decision. Discovery has commenced and there is no change in our estimated legal cost. We will keep you up-to-date on these expenses throughout the year.
Now, before I turn it over to Jono to summarize, I wanted to give you an update on our results so far in the second quarter. As of this morning, we had approximately 15.7 billion in assets under management. That was slightly down from where we ended the year due to negative market movement despite 175 million in inflows. Even though AUM is slightly down, our average AUM is up about 8%. So our revenue should be higher if this trend continues. You can see from the chart on the right, we are continuing to see very good inflows into our emerging market equity ETFs despite the industry experiencing nearly $2.5 billion of outflows, primarily in equities.
So just to quickly summarize our financials, we have solid results and are starting to demonstrate the benefits and operating leverage in our business model through improved margins and strong cash flows. We will continue to focus on top line revenue growth and prudent cost management. Thank you. Let me turn it back to Jono.