 incorporating data science, sustainability and new tools for portfolio construction is resulting in stronger growth than at any time in our corporate history.
We generated a record $267 billion of net inflows from active strategies in 2021, including a second consecutive year of record active equity inflows. Active strategies contributed over 60% of our annual organic base fees, and our growth is significantly outpacing that of our peers and the broader industry as we take market share in this fragmented landscape.
BlackRock’s active mutual fund captured the number one share of industry flows in 2021, and our organic growth rate has tripled the industry. As Gary discussed, our investment performance remained strong with 88% of retractable fix system and 78% of our fundamental active equity funds above benchmark or peer median for a 5-year period. And in the U.S., nearly 80% of our active mutual funds are rated either a Morningstar 4 or Morningstar 5, positioning us well for future growth. Clients are increasingly – increasing their allocation to alternative strategies as they search for diversification and higher returns. BlackRock has built a broad platform across infrastructure, private credit, real estate and private equity to meet that demand. We raised a record $42 billion in client capital in 2021 and are confident in our ability to accelerate our growth as a leader in private markets.
Infrastructure, for example, has significant secular tailwinds, driving growth and will be an important engine of fiscal stimulus for economies looking to build for their future. BlackRock is incredibly well positioned to capture opportunity in this area. We are one of the largest infrastructure managers in the industry with over $35 billion of client assets, including one of the largest renewable power platform. We have grown our platform fourfold in the last 5 years and look forward to partnering with more clients as we raise new vintages in our flagship funds and launched new innovative strategies in this asset class.
iShares also had a record year as the global ETF industry crossed $1 trillion in annual inflows for the first time. Growth was driven by greater adoption globally from asset owners, asset managers, wealth managers and more recently, for many of the approximately 40 million first-time investors who opened self-directed investment accounts over the last 2 years. BlackRock and iShares ETFs generated a record $306 billion of net inflows in 2021. We saw strength across each of our product categories including over $100 billion of net inflows into our core ETFs for the first time and nearly $80 billion in our fixed income ETF and more than $50 billion into each of our sustainable and precision ETF categories.
We saw strong client demand for fixed income ETFs despite a challenging macro environment for fixed income more broadly. Our growth benefited from the diversity of our product range across inflation rate bonds, municipal bonds, sustainability and emerging market exposures and the diversity of our client base, many of whom are increasingly using ETFs are part of their active portfolio construction. Worldwide ETFs are increasingly becoming the vehicle of choice for accessing a broad range of investment exposures, both in a passive way and in an active way. And as barriers for ETF adoption comes down, it is enabling a new generation of investors to access markets and more and more of them are looking to ETFs as a default investment vehicle. For those wanting to create more customized indexes, our Aladdin technology has long provided this capability to institutions. And through our recent Aperio acquisition, we can now provide custom index capabilities to U.S. wealth advisers.
Following a breakout in 2020, momentum and sustainable investments continued, and we generated a record $104 billion of net inflows in 2021 as client demand for sustainable strategies accelerated. We now manage $509 billion in sustainable AUM, more than double from a year ago and remain committed to innovating and expanding choice for our clients. One of the biggest opportunities of this generation will be helping our clients navigate the global transition to a net zero economy. We have already seen $4 trillion of capital move from traditional investments to sustainability ones in the last 2 years alone and this is just the beginning.
The transition will not happen overnight and it will require significant investment in technology. BlackRock is working with companies across a wide range of carbon-intensive sectors that are proactively transforming their businesses and whose innovation will be critical to the world’s decarbonization agenda. We believe these companies will present an important investment opportunity for investors. BlackRock is intently focused on helping our clients participate in these opportunities and understand the impact of the transition on their portfolios through better data and analytics. Our ambition is to move more capital into transition than anyone else.
Our multi-decade investment into Aladdin technology platform continues to differentiate BlackRock both as an asset manager and a leading fin-tech provider. We generated $1.3 billion in annual technology revenues, up 12% year-over-year. We remain focused on continually evolving Aladdin for the next decade and beyond. We are innovating and extending our capabilities into areas of high client demand, including whole portfolios, wealth and sustainability.
The combination of Aladdin and eFront for example, which allows a client to bring together their whole portfolio in one place and customized at scale has already been embraced by over two dozen clients, and the pipeline is the strongest it has ever been and growing. The breadth of BlackRock investment strategies, our technology capabilities and our one BlackRock culture are truly, what differentiates us in providing global portfolio solutions to our clients. In my conversations with clients around the world, I’m hearing about the challenges they are facing and their desire to consolidate the number of partners that they work with. They are increasingly choosing BlackRock as their partner of choice for those large strategic complex relationships. This is resonating, especially in our work with insurance clients.
Our strong fourth quarter inflows included a previously announced $49 billion of active fixed income mandate from a large strategic insurance client. Our role at BlackRock is to leverage our insurers expertise and our diversified global platform across asset management, technology, sustainability, advisory solutions to deliver fully and completely to our clients. We see significant opportunity to work more closely with our insurance and broader OCIO clients in 2022 and beyond.
Our ability to address client challenges enables us to fulfill our purpose and drive long-term performance that benefits all our stakeholders. Over the last 5 years, clients have entrusted us with $1.8 trillion of net new assets. That’s our organic growth for the last 5 years. We crossed $10 trillion in AUM in the fourth quarter. As with every milestone we reached over the decade, we are incredibly humbled by our client support and their incredible trust they have placed on us. All of us at BlackRock feel and take this deep responsibility in managing every dollar our clients awarded us, whether it is an individual investor using one of our ETFs is their first portfolio or investment account or a very large pension fund entrusting us with their whole portfolio. It is truly an honor that we recognize every moment and every day.
BlackRock’s consistent results are possible because of our dedicated employees. I often talk about the importance of putting a company’s purpose at the foundation of a relationship with all stakeholders. Our purpose is resonating with our employees more than ever. BlackRock employee base has remained stable over the last 2 years amidst its turbulent environment. And I’m extremely proud of how passionate our 18,000 employees are in helping more and more people experience financial well-being.
I want to take this moment to thank each and every one of our employees and every one of them individually for their continued partnership resilience and hard work and dedication through another difficult year. Everything BlackRock does is rooted in our culture of focusing on the long-term, and we will continue to innovate. We will continue to be using our scale and contributing to a more equitable and more resilient future to benefit more clients to benefit our employees, and to benefit our shareholders and the people and communities worldwide where we operate. I firmly believe that the efforts of 2021 will position BlackRock to deliver value over the long run for all our stakeholders.
With that, let me open it up for questions.
[Operator Instructions] Your first question comes from the line of Alex Blostein with Goldman Sachs. Your line is open.
Hi, Alex. Happy New Year.
Hi, good morning, everybody. Happy New Year to you as well. So maybe we could start with a question around just the active dynamics for BlackRock in 2021. Clearly, a great year, record year in active flows across the board, equity, fixed income etcetera. How sustainable do you think this trend will be, I guess, into ‘22. And then I also was hoping you could expand on how faster increases in interest rates could also impact asset allocation decisions over the next 12 to 18 months?
Sure. Excuse me. I’m getting over a cold from my grandchild. Our results in our active investment strategies is really one of the core transformations of BlackRock over many years of work. The history of BlackRock was an active fixed income manager, our acquisition of BGI with our fantastic quantitative approach to both fixed income and equity active strategies, our development in our illiquid space where we built out that platform, our recommitment and fortifying our fundamental equity teams over the last 5 years, which led to great performance. In addition, over the last 5 years, Alex, and you’re aware of this, our build-out of our distribution team, our build-out in the RIA channel, having $102 billion of inflows from retail globally, the large portion of that was active. So it’s not just building out our investment teams and fortifying them, but it was building out also our distribution side of our businesses, too. That’s all built -- led to a well-positioned as active strategies continue to be a choice with more and more investors worldwide