Chairman, Chief Executive Officer & President at Skyworks Solutions
Thanks, Mitch. And welcome everyone. Before I touch on the fourth fiscal quarter results, I want to highlight the significant accomplishments that underpin a record breaking year for Skyworks.
First, total revenue grew $5.1 billion, 52% ahead of last year, representing an increase of over $1.7 billion. We increased earnings per share to $10.50, up 71%. Operating cash flow expanded to $1.8 billion, an increase of 47%. And we completed a strategic and compelling acquisition, immediately diversifying our product portfolio and expanding our market reach. Finally, with the investments we've made, Skyworks navigated a complex supply chain environment, leveraging world class manufacturing capabilities across strategic technology.
Now, turning to Q4 where Skyworks delivered record performance. Revenues in our mobile and broad markets portfolios both grew at double-digit rates sequentially and year-over-year as we capitalized on broad based momentum fueled by demand for our unique connectivity solutions. Specifically, we did revenue of $1.31 billion, achieved gross margin of 51% and operating margin of 37.2%. We posted earnings per share of $2.62, exceeding our guidance by $0.09 and generated strong operating cash flow, totaling $398 million in the quarter. The complexity inherent in 5G and demand for highly integrated solutions were major catalysts in driving our performance.
The momentum in global 5G carrier subscription is building, with estimates of 580 million users today, expanding to more than 3 billion users by the end of 2025. As expected, smartphones are leading the early transition. But new innovative use cases are emerging from automotive and industrial IoT to enhanced virtual reality, gaming and telemedicine. Importantly, the power of 5G is increasingly being harnessed to drive sustainability efforts across industries worldwide, providing a wireless backbone to AI powered ecosystems, combining measurement analysis and optimization. For example, a major US manufacturer is combining wireless sensor-enabled cameras with artificial intelligence to reduce chemical usage by 90%. And a European startup is deploying wireless climate sensors in agricultural applications, to drive crop yields up to three times.
Looking ahead, 5G has the capacity to manage diverse connections across industries as it becomes the universal connector from the home, to the office, to the factory floor and to the farm. Skyworks is uniquely positioned to capitalize on this transformation with decades of connectivity leadership. The acceleration of 5G powered broad set of use cases in Q4 with design wins encompassing the newest, most innovative smartphones and IoT devices, as well as gains in wireless infrastructure. Specifically, in mobile, we accelerated the reach of our Sky5 portfolio, powering the latest launches at leading Tier 1 smartphone OEMs, supporting more than 20 platforms.
In addition, we shipped Sky5 solutions across Samsung Galaxy's tablet portfolio. And in IoT, we continue to gain new customers and expand content. We delivered 5G CPE connectivity solutions to Nokia. We partnered with Swisscom to launch their Wi-Fi 6 GPON residential gateway. We ramped Wi-Fi 6 and 6E platforms at NETGEAR and Cisco. Launched connectivity in home security devices with Amazon Ring and Comcast. And captured design wins at Garmin supporting mobile fitness applications.
In automotive, we supported autonomous driving systems with a market leading robo taxi platform and enabled the advanced charge control unit systems for a Tier 1 European automotive OEM. Across the infrastructure markets, we provide power isolation solutions to a strategic manufacturer of EV, including residential solar and energy storage systems. And we secured multiple design wins in next generation MIMO and small cell base station installations.
Moving ahead, we see a multiyear secondary technology evolution with our aperture widening from smartphones to industrial, automotive and expansive set of IoT devices. Skyworks is fueling this dramatic technological shift with our unique capabilities; integrating not only 5G but increasingly with our other critical connectivity protocols, including high performance Wi-Fi, Bluetooth and precision GPS. As these opportunities emerge, Skyworks is positioned to win, with the breadth and depth of our customer relationships established over 20 years, our experience across multiple technology transitions, and a dedicated and talented workforce that executed extraordinarily well during fiscal 2021.
With that, I will turn the call over to Kris.