Integral Ad Science Holding Corp.

Good afternoon, ladies and gentlemen. Thank you for standing by. And welcome to the IAS 2021 Fourth Quarter and Full Year Financial Results Conference Call. At this time, all participants are on a listen-only mode. After the speaker's presentation, there will be a question and answer session. To ask a question during the session, you will need to press the star, then the one key on your touch-tone telephone. If you call our assistance at any time, please press star, then zero. I would now like to hand the conference over to your speaker host, Jonathan Schaffer. Head of Investor Relations of IAS.

Please go ahead. Thank you.

Good afternoon and welcome to the IAS 2021 fourth quarter and full year financial results conference call. I'm joined today by Lisa Utschneider, CEO, and Joe Pergola, CFO. Before we begin, please note that today's call contains forward-looking statements. We refer you to the company's filings with the SEC for more details about important risks and uncertainties that could cause actual results to differ materially from our expectations. On today's call, we will also refer to non-GAAP measures. A reconciliation of non-GAAP measures to the most directly comparable GAAP measures is contained in today's earnings release available on the company's IR site, investors.integralads.com. So with these formalities out of the way, I'd now like to turn the call over to our CEO, Lisa Utschneider. Lisa, you may begin.