Martin Flanagan
Analyst · UBS
Thank you very much. And thank you, everybody, for joining us. I'm joined with Loren Starr, and we'll be speaking through the presentation that's available on the website, if you wish to follow that way. As has been our practice, we'll review the business results for the first quarter. Loren will go into greater detail on the financial results, and then both of us will answer any questions that people might have.
And so let me start by highlighting the operating results for the first quarter, and you'll find those on Slide 3. Long-term investment performance remained strong during the quarter. 81% and 80% of actively managed assets were ahead of peers over 3 and 5 years, respectively. Strong investment performance combined with comprehensive range of strategies and solutions we offer, to help clients achieve their desired investment outcomes contributed to long-term net inflows of $10.3 billion during the quarter.
Adjusted operating income was up 3.1% compared to the first quarter of the prior year. Reflecting continued confidence in the fundamentals of our business, we're raising the quarterly dividend to $0.27 per share, up 8% over the prior period, and also, returning $185 million to shareholders during the quarter through dividends and in buybacks.
Assets under management were at $798 billion during the first quarter, up from 200 -- $792 billion in the prior quarter. Operating income was $374 million in the quarter versus 700 -- $373 million in the prior quarter. Earnings per share were $0.63, the same as you saw in the prior quarter.
Before I go into -- before Loren goes into company's detailed financials, let me take a minute and review investment performance. I'm now on to Slide 6.
Our commitment to investment excellence and our work to build and maintain a strong investment culture helped us maintain solid, long-term investment performance across the enterprise during the quarter. Looking at the firm as a whole, 81% of assets were in the top half on a 3-year basis, and 80% were on the top half on a 5-year basis.
Now there's been a tremendous amount of debate in the marketplace recently about active versus passive investing. Here at Invesco, we take a more balanced view on this topic. Clients seek better returns with less volatility at reasonable fees. Our focus as always, is on helping clients achieve their investment objectives with a broad range of capabilities and vehicles.
We take a high-conviction approach to both active strategies, high active share, and our passive strategies through strategic data. Separately and combined, they are better tools to build portfolios in a more precise way that helps clients achieve their investment objectives. With our high conviction approach to investing, our broad range of capabilities and vehicles, Invesco is well-positioned to help advisers and clients build better portfolios. We're developing a series of white papers that provide further clarity, in both active strategies and passive strategies, to help investors and clients build portfolios that better meet client-investment objectives.
Our focus on meeting client needs with a broad range of active and passive capabilities drove solid flows into the business during the first quarter. On Page 8, you'll see that active and passive flows were quite strong during the quarter, reflecting continued efforts to deliver strong investment performance and provide excellent outcomes for clients. I'd also like to note that these are the highest active flows we have achieved in 2 years.
We also saw strong flows across our institution on retail channels during the quarter, and flows were positive across all 3 regions during the quarter as well. These figures on Slide 9 reflect the broad diversity of flows we saw across our global business during the quarter, which included strength of GTR, fixed income, quantitative equities, real estate, International Growth, amongst others. The institutional pipeline of won but not funded mandates remains at an all-time high, including a broad range of investment capabilities.
Drawing on our discussions with clients and others, we've identified several key themes that will drive growth and shareholder value within our industry over the long-term. Invesco is well-positioned to deliver for clients, which is a core element of these major themes. We have a strong, long-term investment performance. In fact, Invesco was recently cited by Barron's magazine as 1 of the top 3 fund families for 2014 in their annual fund ranking, and Invesco was the only fund family placed in the top 5 over 1, 5 and 10 years.
We have a comprehensive range of distinctive investment capabilities delivered through a set of investment vehicles that are fully aligned with client needs. We have deep and stable teams in local markets across the globe, with discreet investment perspective and experience across diverse market cycles. This puts us in a very strong, competitive position, and will help us continue to deliver value to our clients and shareholders.
We feel good about the results for the quarter. Strong flows we saw in the first quarter are continuing into second quarter across our global business, both in retail and institutional channels, and also, within the region, continued strength in EMEA and Asia-Pacific and across a broad range of asset classes.
April, month-to-date, we have generated nearly $3 billion of net long-term inflows. These flows are result of the progress we continue to make in delivering strong investment performance and meeting client needs with a range of strategies and solutions, which positions us well for long-term success.
I'll now turn it over to Loren to -- more details on the financials.