Thanks Mike. So Q4 was a very strong finish to what was a transformational year. In 2018, we had accelerating revenue growth, expanding adjusted EBITDA margins, market leading product innovation, dramatically increasing customer loyalty and retention. Record acquisition activity and profitable international expansion. So just an incredible year of progress, a transformational year for Upland Software. In the fourth quarter, 62% total revenue growth. 72% adjusted EBITDA growth. So just an incredibly strong performance. And as of Q4, our pro forma annualized run rates are now north of $194 million in revenue and $72 million in adjusted EBITDA. That's Q4 annualized adding in the most recent acquisition. So our pro forma annualized run rate on revenue just shy of $200 million versus the $120 million, $130 million we had exiting last year. So tremendous growth nearly doubling the size of the business. Notably Q4 organic growth and reported recurring revenues was 10%, 10% organic growth. So that's double-digit organic growth for Upland Software for the first time. So a really impressive performance on organic growth and more on that in a moment. In 2018, we achieved year-over-year improvement in net dollar retention rate NDRR from 93% when we last published that number which we publish annually, we last published the 2017 number which was 93%, we've taken that to 98% so a massive improvement. This near 500 basis point improvement in NDRR is evidence that our UplandOne platform and our focus on 100% customer success are driving increased customer satisfaction and loyalty, higher NPS scores, higher renewal rates, strong expansion sales and increased pricing power. Also in 2018, we continue to make efficient high-impact investments in sales and I think it's worth taking a moment to look at where we've come over the last eight quarters. So since the first quarter of 2017 eight quarters ago, we have increased our field sales headcount from three field sales people to 28. We've increased our total sales headcount from 27 to 65 right that latter number including the inside sales teams. We have more than doubled our organic growth in reported recurring revenues during that period, and all the while we have expanded our adjusted EBITDA by nearly 1,100 basis points, taking adjusted EBITDA margins from 26% in the first quarter of 2017 to 37% in the fourth quarter of 2018. So efficient investment, supporting organic growth, consistent with a massive ramp in EBITDA margins. In the fourth quarter, we made two strategic and accretive acquisitions that further expand our capabilities in our customer experience management or CXM as we call it solution suite, and those were the acquisitions of an Adestra and Rant & Rave. And the additions of these two products added core capabilities to our CXM solution suite including marketing automation and personalization, automated campaign management and social media monitoring and customer sentiment survey and analysis capabilities with market leading voice of customer and voice of employee solution. So great ads from a strategic standpoint. For the full year, we did a total of four acquisitions that added $60 million in total pro forma revenues and $26 million in pro forma adjusted EBITDA. And I would note for these strategic acquisitions that have built out our Suites, increased our customer base driven scale and expanding margins we paid an average of 2.9x total revenues and less than 7x about 6.8x total pro forma adjusted EBITDA. So these acquisitions were not only strategic, they were also highly accretive. And I would note that our pipeline is stronger than ever and our position in the marketplace continues to grow stronger as well. Circling back on organic growth. Again, we achieved 10% organic growth in Q4 per reported recurring revenue and obviously we are extremely pleased by that 10% organic rate. And it resulted from as we've talked about before a number of different motions. The efficient increase we made in sales capacity. The addition of some strategic acquisitions over the past six, seven, eight quarters to the Upland family that have been higher growth solutions. The increased customer satisfaction and loyalty that we have delivered through our UplandOne platform which is not only increased NPS scores but driven higher renewal rates which themselves support organic growth. Our strong expansion sales, again on that base of a satisfied customer cohort wanting to come back and buy more and finally increased pricing power. But before we get ahead of ourselves a couple of things. One, if you look at our organic growth quarter by quarter in 2018 right, Q1 through Q4 with 6%, 6%, 7%, 10%. So it's a nice upward ramp but on a trailing four quarter average basis that growth is closer to 7%. Moreover, if you look in organic growth on a year-over-year basis 2018 versus 2017 it's lower than that due to how we calculate it right because we only include products if they're owned through an annual cycle. So you'd be if you did a year-over-year analysis you're excluding products like RightAnswers, Waterfall, Qvidian, InterFAX, RO Innovation, Rant & Rave and Adestra. So you're going to have a lower number. And finally, I continue to believe as I said before on these calls that the way acquisition accounting works it always tends to inflate organic growth a bit. So again net-net thrilled by 10% organic growth in Q4 but we're going to maintain our conservative stance on guidance going forward being conservative here is best. So in addition just this week we announced a major new product and go-to-market strategy with the launch of seven enterprise cloud solution suites designed to maximize value for customers and to increase Upland's organic growth rate, bringing these products together in a way that is relevant and compelling that adds value for customers but is also easier not only to use but to market and sell. And to be sold by our growing enterprise sales team. So it's really setting us up for a great 2019 and look our strong guidance that Mike will discuss further in a moment reflects that. We are well set up for a great 2019. Our customer relationships are strong. Our sales channels are more productive than ever. Our pipeline of acquisitions remains robust. And we have the operating and financial resources to continue to execute on our plan on significant revenue growth and margin expansion. Look, Upland is a story of three platforms. We've got an M&A platform with a massive, highly accretive consolidation opportunity. We have a product platform that enables us to bring acquired products together in a compelling relevant way that adds value for customers and so many exciting things under development right now. Suite is number one on that we'll be rolling out additional functionality that again brings these solutions together adds more values more value for customers. And then thirdly, we have an operating platform UplandOne that delivers lights-out, best-in-class customer satisfaction and adjusted EBITDA margin. And those platforms they're working together like gears driving value and they're benefiting from three big secular tailwind. First is the enterprise demand for automated solutions. Second the transition to cloud and we're just in the early inning of that transition. And then third the tens of billions of BC investment chasing those first two trends which creates and funds companies that ultimately become acquisition pipeline for us. So it is an evergreen opportunity. I've seen it before as an entrepreneur. We are at a point today at Upland of critical mass, critical mass and people, in process, in products, in customers, in access to capital. In access to deal flow, a point of critical mass where you start to see powerful network affects. Every acquisition at scale, expands margin, strengthens our Suites, adds customers, add solutions that we can then pump through our growing enterprise sales force to our 9,000 customers. It's a beautiful model and we're just getting started and we could not be more excited about 2019 and the road beyond. So with that I'm going to turn the call over to Mike who will give you a more detailed look at the Q4 numbers and guidance. Mike?