Thanks Jonathan and welcome to everyone joining today's call. Our first quarter results exceeded our expectations for the period and despite the global macroeconomic and geopolitical climate, we are providing positive financial guidance for the rest of the year. We are executing on our growth strategy, investing in differentiated technology and accelerating our product roadmap and time-to-market with targeted acquisitions. We're also creating value for our customers through our focus on customer obsession and innovation which is fueling our growth. Our solutions have never been more relevant. Marketers rely on IAS to protect and amplify their brands across the digital media landscape that is rapidly evolving and increasingly difficult to navigate. As the massive digital advertising market continues to grow at double-digit rates, IAS ensures that our customers' advertising creating is viewable by human in brand-safe brand-suitable environments and in the desired geographies. Increasingly, marketers are also looking to IAS for contextual targeting and campaign optimization. According to eMarketer, today's global digital advertising market, excluding search, has grown to over $300 billion. As a leading digital media quality company, we offer ROI solutions to help marketers invest in high-quality media and drive greater returns and efficiencies on their digital advertising spend. We empower marketers with first-to-market high-quality differentiated products. We bring deep integrations with major platform partners that drive innovation and we are leading the way in promising channels like social media and CTV. During the quarter, we realized growth across our business highlighted by a 53% increase in programmatic revenue. Total revenue for the quarter grew 33% to $89.2 million. Adjusted EBITDA reached $24.8 million at a 28% margin. We also achieved net income profitability for the period of $1.2 million or $0.01 per share. Overall, demand trends remain positive despite macroeconomic uncertainty, as reflected in our outlook for the second quarter and full year. We have a high degree of visibility into customer demand for IAS's products based on where we operate within the ecosystem. Our global sales team has closed impressive customer wins in recent weeks, with marquee brands including Progressive JPMorgan Chase and Activision Blizzard to name a few. Before I dive into the quarter in more detail I want to share with you two organizational changes. As you saw in today's earnings release, Joe will be leaving IAS to pursue new opportunities. He will remain as CFO through the reporting of our second quarter results and the filing of our 10-Q in August to ensure a smooth transition of his responsibilities. We have begun a search for a new CFO and have engaged an executive search firm to assist with our efforts. Joe has been a valued member of our senior leadership team since joining IAS in 2019. He brought financial structure and discipline to IAS as we transform the company. He then led the finance team through our IPO and first year as a public company. On behalf of the Board management and the entire IAS team, I'd like to personally thank Joe for his leadership, counsel and commitment to ensuring the company's success. We have a strong finance team with a deep bench that gives us a great foundation to support our future growth. In addition, I'm excited to announce today that Yanni has joined IAS this week in the newly created role of Chief Commercial Officer. Yanni will be responsible for leading our sales and marketing efforts. Yanni brings extensive operational experience both in startups and large tech companies including Twitter and Yahoo!. He has a proven track record of driving growth by closely aligning sales marketing and product teams. He approaches businesses through a customer and commercial lens. Having worked with Yanni for nearly three years at Yahoo!, I've personally seen his ability to accelerate businesses particularly in the programmatic space. We are thrilled to have Yanni join the team. Turning now to our recent business performance in more detail, I'd like to provide an update on our four growth pillars including programmatic, social media, CTV and international. Let's start with programmatic, which for the first time represented more than 50% of our advertising revenue in the period. During the quarter, we generated strong demand for our Context Control solutions. Context Control represented 41% of programmatic revenue, up from 38% in the fourth quarter of 2021. Context Control includes both avoidance and targeting solutions. We currently have over 400 contextual avoidance and targeting segments of highly relevant content. Our contextual avoidance solution represents the vast majority of Context Control revenue to date. Our avoiding solution enables marketers to identify content unsafe and unsuitable for their brands as defined by GARM, the Global Alliance for Responsible Media. In March alone, we had 64 net new contextual avoidance activations. 80 of our top 100 accounts now use Context Control for avoidance, up from 76 of our top 100 accounts last quarter. Beyond the top 100, we are also seeing increased customer penetration and adoption which represents a significant opportunity for future expansion. The increased adoption of Context Control for avoidance uniquely positions IAS in the contextual targeting arena as well. Marketers value a single integrated solution, which reduces complexity. We are introducing new ROI tools within contextual targeting to enable marketers to better plan their campaigns and seamlessly optimize and activate targeting segments. These tools calculate reach simplify activations within DSPs and track segment performance. Lastly, within programmatic, we made enhancements to Total Visibility, our quality path optimization, or QPO, solution which helps marketers optimize media spend and drive campaign outcomes. We introduced a dashboard in our Signal user interface to provide marketers with a unified view of their global campaigns. The free version of the Total Visibility dashboard within Signal offers insight into how much spend is wasted on unviewable, unsafe and fraudulent impressions. It also provides quality CPM or QCPM, which helps marketers understand both the quality of media they are buying and the cost efficiency at which is being purchased. Marketers can then access premium services to optimize campaigns based on supply path view and quality financial metrics. As an example, we conducted a study with Visa EMEA to demonstrate the value of our QPO solution. Visa wants to develop the strategy to reduce waste and increase spend in working media by determining the most efficient buying pass. IAS monitor spend in over 18 European markets. Through IAS quality path optimization including redirection of spend away from low-performing SSPs and demands and comparing private marketplaces to open market buys, Visa significantly improved efficiency and increased campaign ROI. In social media, we are driving technology innovation for a growing number of platforms. Following the consumer shift to a digital-first lifestyle, user adoption of social media has reached unprecedented levels. In our social media ad receptivity report from February, we found that social media ad spend is projected to reach $82 billion in the US by 2023 and 96% of consumers currently use at least one social media platform. We're very pleased to expand our partnership with TikTok into new markets and products. Our pre-bid in-feed brand safety targeting solution for TikTok classifies video, image, audio and text in the live feed of TikTok consistent with GARM categories. Previously we launched our TikTok pre-bid brand safety solution in the US, Germany and France. TikTok and IAS are also expanding pre-bid brand safety to additional markets, including Australia and the UK. In addition we are thrilled to announce earlier this week the launch of the Global GA for measurement of TikTok viewability and invalid traffic, or IVT. This will allow marketers to understand the performance of their ads within the TikTok platform. By partnering with IAS, marketers have access to an increasingly comprehensive set of solutions to manage their campaigns on TikTok. Marketers go where the users are. At a recent investor event, Ron Amran Senior Director of Global Media at Mars, the home of countless and beloved consumer brands and a highly valued IAS customer said "TikTok is a fast-growing platform at massive scale already. They're highly engaging, their advertising inventory works and there's a strong targeting measurement capability." The technology we built in-house for TikTok, is scalable and portable to other platforms by promoting open industry standards for measurement, and access and content in mobile apps, a first of its kind integration at this scale. In the next few months, we will launch in beta our postpaid brand safety measurement solution for Twitter. This product addresses the need for marketers, to better understand the user-generated content, or tweets displayed adjacent to their ads in Twitter feed further demonstrating IAS's strength, in classifying multimedia content prevalent on social platforms. On our last earnings call, we discussed our acquisition of AI video platform Context. Context accelerates our existing multimedia classification capabilities. Their technology enables us to go beyond standard framework, especially in video-rich environments such as social platforms and CTV. Our first integration using the combined platform will become available in the coming months. Moving to CTV, where we remain at the forefront of innovation. We acquired Publica nine months ago, and are very excited about our progress to date. Publica added video publisher and SSP integrations, a unified ad auction, ad stitcher and an ad server to our tool kit. The combination of IAS's buy-side data and Publica's access to vast amounts of CTV data, on the supply side, has enabled us to innovate faster and provide unprecedented transparency into the CTV market. That's a win for marketers, publishers and viewers. We are delivering greater transparency in CTV, so that marketers are comfortable shifting spend from traditional linear TV. In the first quarter, we began offering insights to marketers on where CTV ads run based on the device, app, channel and content including genre, category and rating. We continue to add more publishers who are partnering with us, to share this data and bring transparency. IAS is the first to release, show-level CTV brand safety, based on GARM guidelines, providing marketers with critical insights. We are also helping CTV publishers better optimize and monetize their inventory. Publica has closed several exciting wins recently. DIRECTV is using Publica's unified ad auction, to help capture more budgets that have shifted to programmatic channels. Publica announced an agreement with Hearst Television, to provide server-side ad insertion or SSAI and unified auction services. In addition, Future Today, the leader in ad-supported streaming and Molotov TV, the leading over-the-top platform in France, are live with Publica for SSAI. During the quarter, we integrated our CTV pre-bid fraud solution within through Yahoo! DSP. Marketers who access CTV inventory via Yahoo! DSP will have protection against fraudulent traffic with access to fraud filtering pre-bid segments. Yahoo! represents the third major DSP to date to integrate our CTV pre-bid fraud solution. Additionally IAS was selected as an NBC Universal Certified Measurement Partner. IAS is now certified for audience verification enabling us to provide marketers granular media quality measurement across NBC Universal's platform. We continue to invest in building our CTV capabilities for long-term success. In April we announced the appointment of Sean Galligan as Chief Revenue Officer at Publica. Sean brings extensive publisher and advertising technology experience that will be instrumental as we extend Publica's leading market position globally. International represents our fourth growth pillar and is a key point of differentiation for IAS. The trend with marketers has been to partner with one verification provider globally across multiple markets channels and products. International revenue represented 32% of revenue in the first quarter. In EMEA, where we maintain a market-leading presence. The tragic war in Ukraine led some marketers to pull back initially on their campaigns, as they reallocated spend and adjusted creative. However, we saw demand return in EMEA and has since stabilized. We have no full-time employees in Ukraine or Russia and do not recognize revenue in either country. We stand with all people who have been impacted by this conflict including our IAS colleagues with loved ones in Ukraine. The prolonged global supply chain delays and resulting chip shortage impacted campaign spend in Q1 for a handful of customers, particularly in EMEA in the tech, telco and automotive verticals where IAS is the dominant provider. We expect any future impact from supply chain delays to be limited to these select customers, which has been factored into our outlook for the year. We have taken steps to extend our leading presence in key international markets, including EMEA with investments in senior management and talent. Earlier this year, we welcomed Csaba Szabo as our new Head of EMEA and over 15% of our new hires in Q1 were in EMEA. Under Csaba's leadership we are accelerating our expansion in European markets including Denmark and Norway. We're also expanding our international presence in new and existing markets in APAC, including India. Indonesia, South Korea, Taiwan and Vietnam where our first mover advantage is key. These are markets reliant on demand primarily from global marketers as well as from local brands. We are investing in resources to serve these markets. We've made 13 new hires in APAC since the beginning of the year, including a new head of the South Korean market who joined us in April. Additionally, our investments in agency partnerships at the local level have enabled us to expand customer relationships into new countries in Europe such as Latvia and Estonia. Beyond our four growth pillars, we are extending our media quality solutions into emerging formats such as audio. Last month, we launched a measurement beta for audio ad measurement and IBT for postpaid verification that works with all OMSDK-compliant platforms. The OMSDK is an open standard framework initially developed by IAS and now implemented widely across the industry for measurement applications. At IAS, we pride ourselves on being customer-obsessed. We incorporate customer feedback into the latest reporting enhancements to our IAS signal reporting platform. We now offer a much desired first-to-market unified view of a marketer's global campaigns and signal. By aggregating campaigns of the global, regional, national or local level marketers can evaluate campaign performance based on custom filters and optimized outcomes tailored to their most important KPIs. And with that, I'll turn it over to Joe to review the financials.