Our customer skill sets are evolving as they continue to become more tech savvy and sophisticated and how they want to interact with the markets. We believe the world is moving towards a more algorithmic and multi-asset class ecosystem. This puts the spotlight directly on our one-stop shop value proposition in a good way, which we continue to take to the next level by investing in technology and adding and linking products in geographies. Diving into the fourth quarter, client activity and risk appetite continued to grow, which drove strong double-digit revenue growth. Specifically on Slide 4, record revenues of $370 million were up 26.3% year-over-year on a reported basis and 24.6% on a constant currency basis and adjusted EBITDA margins expanded by 15 basis points on a reported basis and 122 basis points on a constant currency basis relative to the fourth quarter of 2022.

Turning to Slide 5. Rates and credit led the way, accounting for 60% and 27% of our revenue growth, respectively. Record revenues across rates were driven by a double-digit revenue growth across global government bonds, swaps and mortgages. Similarly, the record revenues across credit were led by strong U.S. and European corporate credit in muni trading, including record quarterly market share and electronic U.S. investment grade. Money markets also had a record, fueled by growth in our retail certificate of deposit franchise and continued organic growth in institutional repos. Equities was driven by institutional ETFs and our efforts to diversify and grow our other equity products. Finally, market data revenues were driven by our LSEG contract and our proprietary data products, which continue to enjoy robust growth.

Turning to Slide 6. Our record fourth quarter capped off a record year in 2023. Record volumes across most asset classes translated into 12.6% and 12.2% revenue growth on a reported and constant currency basis, respectively. The scale generated by our strong top line results drove approximately 49 basis points of adjusted EBITDA margin expansion and 19% adjusted earnings growth. As our growth initiatives continue to scale, we maintain our tradition of constant and focused organic investment. 2023 was a very productive year with numerous accomplishments to highlight. Broadly, they can be summed up as enhancing our existing product capabilities, adding new clients, forging new partnerships and placing more bets on the table. On the capability front, we completed our integration of the NASDAQ fixed income acquisition, made meaningful progress across our mortgage specified pool platform and expanded our product suite across global swaps.

On the client side, we continue to scale our credit, mortgage and swaps platform as we make inroads with our largest clients. On the collaboration front, we completed the first phase of our integration with BlackRock's Aladdin expanded our partnership with FTSE indices, went live with our FX all Link for FX hedging and announced our new data licensing agreement with LSEG. Finally, we spent $205 million in a mix of cash and equity on our acquisitions of Yieldbroker in August of '23 and r8fin in January 2024. We believe our investments have not only positioned us well for the future, but also helped make 2023 another banner year for Tradeweb. Moving to Slide 7. 2023 continued the streak of robust revenue growth that we have worked hard to deliver for multiple years now.

Specifically, while the majority of our revenues still come from rates, 40% of our revenue growth came from our other businesses. In fact, over the last five years, we have nearly doubled our overall revenues. Over 50% of that revenue growth coming from our non-rates businesses with nearly 40% of the revenue growth coming from our international business, which has averaged 18% since 2016. Our international revenues are anchored by our European business but our Asian business produced fourth quarter revenue growth in excess of 50% year-over-year. Looking ahead, we believe Asia Pacific and more broadly emerging markets will continue to become a larger component of our international growth story over the next few years. We are focused on expanding our client footprint across domestic markets and protocols and cross-selling our leading products.

Our cross-selling initiatives continue to pay dividends with the recent Yieldbroker acquisition, which we believe will unlock more opportunities. Relentless innovation has been critical to our success. Throughout our history, we have prioritized being first to market, which requires constant investment. In the last eight years, we have invested over $630 million in technology to help shape the future of electronic markets growing those investments at an average of 13% since 2016. And as our investments bear fruit, adjusted EBITDA margins have expanded methodically. Looking ahead, we expect 2024 to be another investment year. Our investments remain heavily concentrated in rates and credit, and we are in the early stages of building out our emerging markets franchise.

We are optimistic about the long-term durability of our growth across the business given our market share gains and pipeline of innovations. Turning to Slide 8. I will provide a brief update on two of our main focus areas, U.S. treasuries and ETFs and turn it over to Tom to dig deeper into U.S. credit and global interest rate swaps. Starting with U.S. Treasuries. Fourth quarter revenues achieved a new record, increasing by 18% year-over-year. This was driven by our institutional business that had its best revenue quarter ever, led by record ADV across our institutional streaming protocol and growing adoption of our RFQ plus offering. The high rate environment continued to propel our retail business, where fourth quarter revenues grew 10% year-over-year.

The leading indicators of the institutional business remains strong. We gained share and we achieved record quarterly market share of long-dated U.S. treasuries versus Bloomberg. Client engagement was healthy with institutional average daily trade up 55% year-over-year. Automation continues to be an important theme with institutional U.S. treasury AiEX average daily trades increasing by more than 120% year-over-year and over 50% of our institutional tickets utilizing our AiEX functionality. Our U.S. treasuries wholesale business produced its best revenue quarter in our history, led by record volumes across our sessions protocol and the second best quarter for our streaming protocol. Our central limit order book ADV was down 1% year-over-year, given tougher cloud market conditions though the team remains focused on onboarding more liquidity providers over the coming quarters as they deliver on a holistic strategy across our wholesale protocols.

Within equities, our ETF business outperformed the overall market with fourth quarter revenues up 10% year-over-year with industry activity picking up. Other initiatives to expand our equity brand beyond our flagship ETF franchise continue to bear fruit. Fourth quarter institutional equity derivative revenues were up nearly 30% year-on-year, driven by strong double-digit growth across options and convertibles. Looking ahead, the client pipeline remains strong as the benefits of our electronic solutions continue to resonate. We believe we are well positioned to capitalize on the long-term secular ETF growth story, not just in equities, but across our fixed income business. With that, I will turn it over to Tom.

Tom Pluta : Thanks, Billy. Turning to Slide 9 for a closer look at credit. Strong double-digit revenue growth was driven by 31% and 46% year-over-year revenue growth across U.S. and European credit, respectively. Muni has produced high single-digit growth driven by a pickup in tax loss harvesting, while credit derivatives continued to see softer industry trends. Automation continued to surge with global credit AiEX average daily trades increasing 90% year-over-year. We achieved another fully electronic quarterly market share record across U.S. IG, helped by our highest quarterly IG block market share. Our institutional business continues to scale to new highs as we continue to provide our clients with a diverse set of protocols that meet their execution needs across a variety of market environments.

Our primary focus on growing institutional RFQ continues to pay off with ABB growing 28% year-over-year with strong double-digit growth across both IG and high-yield. Overall, portfolio trading ADV rose over 40% year-over-year, led by growth across U.S. and European PT. In the fourth quarter, we produced record ADV across IG portfolio trading. Our clients continue to get more sophisticated in their usage of PT with 75% of our PT volume done in comp, the highest percentage since the second quarter of 2022. Retail credit revenues were up over 20% year-over-year as financial advisers turn their focus towards more spread-based yielding products to complement buying of U.S. treasuries. All trade produced a record quarter with over $157 billion in volume.

Our all-to-all volumes grew over 30% year-over-year while we also saw over 40% year-over-year growth in our dealer RFQ offering. The team continues to be focused on broadening out our network and increasing the number of responses on the all trade platform. In the fourth quarter, the number of all-to-all responders rose by over 20% and responses increased by 60% year-over-year. We also continued to increase our engagement and wallet share with ETF market makers where inquiry and traded volume was up over 300% year-over-year. Finally, our sessions ADV grew over 40% year-over-year, while ReMatch produced 10% year-over-year growth. Looking ahead, U.S. credit remains our biggest focused area, and we like the way we are positioned across our three client channels.

We believe we have a long runway of growth ahead of us and are focused on serving the growing passive markets, investing in our auto responding and algorithmic technology, increasing our wallet share across all-to-all and DRFQ protocols, and looking at ways to help our dealer clients more efficiently recycle their risk. Additionally, we are focused on improving the analytics around pre and post-trade data. Specifically, across high yield, we have more work to do to drive increased client engagement. We believe we can replicate the success we've had across IG with a particular focus on increasing our penetration with ETF market makers and leveraging our Aladdin collaboration to grow our all-to-all network post integration. Beyond U.S. credit, our EM expansion efforts continue to progress steadily.

In the fourth quarter, we went live with our non-deliverable forward for FX swap hedging in collaboration with FXall and we continue to build out functionality for multi-asset package trading. Moving to Slide 10. Global swaps produced record revenues as a vigorous debate on the timing and direction of Central Bank rate moves and market share gains drove record results across U.S., European, APAC and emerging market swaps. The fourth quarter saw continued impacts from lower duration as clients traded on the shorter end of the yield curve, and we had record compression activity in November. Variable swaps revenues increased 65% year-over-year despite an 8% decrease in duration year-over-year. Overall, global swaps revenues in the fourth quarter grew 51% year-over-year and market share rose to 23.6% with record share across all currencies.

Additionally, over the last two years, we have produced strong double-digit active user growth across currencies with the fastest growth happening across our early-stage penetration into EM swaps. We continue to make progress across emerging market swaps and a rapidly growing RFM protocol. Our fourth quarter EM swaps revenues increased over 150% year-over-year and we believe there is still a lot of room to grow given the low levels of electronification, while our RFM protocol continued to see strong adoption with ADD rising over 160% year-over-year. The strong fourth quarter capped off another record year for our swaps business with overall swaps revenues increasing 18% year-over-year. Moving to Slide 11. Over the last five years, our variable swaps revenues have grown at a CAGR of 26%.

We produced this strong 5-year revenue growth despite an evolving macro backdrop and tepid industry volume growth of 4%. From falling rates to zero rates back to the highest short-term rates we have seen since 2001, the durability of our swaps revenue growth continue to shine through despite COVID, elevated volatility driving a risk-off environment and the failure of several banks. In fact, since the beginning of 2019, the swaps business has produced positive revenue growth in 18 of the last 20 quarters, with 15 of those 18 quarters producing double-digit year-over-year revenue growth. The 2 quarters with negative year-over-year revenue growth were due to extreme factors. Market dislocation related to COVID in the third quarter of 2020 caused revenues to fall 2% year-over-year and excess market volatility prompting clients to take risk off the table in the fourth quarter of 2022 led to a 4% drop in revenues.

As debate has picked up in the market around the level of rates and the shape of global yield curves, industry volumes rose 21% year-over-year. However, it's important to note that most of this increase has been driven by a pickup in short-end activity, which we monetize at very low levels. In fact, we generate over 95% of our swaps variable fees on longer dated trades greater than 1 year and 82% on trades greater than two years. Based on LCH data, over the last two years since Central Bank started to hike rates, short-dated industry volumes, which are defined as anything less than two years, grew over 80% versus 2021, while longer-dated industry volumes grew only 15%. Looking ahead, from a cyclical standpoint, we believe as the yield curve normalizes, this should boost longer-dated activity.

In terms of what we can control, we continue to make further inroads across products and are seeing early success across inflation swaps, swaptions and EM swaps. We are also looking at expanding our presence across multi-asset package swaps in the coming year. The focus on building solutions that matter to clients is paying dividends. With the market still only about 30% electronified, we believe there remains a lot that we can do to help digitize the client's manual workflows while the global fixed income markets and broader swaps market grow. Before I pass it on to Sara, let me touch on compression and the impact to our swaps fee per million. Compression trading is a natural part of the market. Clients put new risk on and then collapse old risk as the market environment changes.

Given that we primarily charge clients for new risk put through the platform, we do not earn meaningful amounts of revenue for pure compression flow as that activity is mainly related to clients reducing line items that they have traded in order to reduce operational costs. Stripping out compression activity, our risk fee per million has been relatively steady over the last few years with the movement really being driven by product mix shift and duration, which impacts the calculation of risk being put on by clients. While compression alone isn't meaningful for revenues, it has become essential to a client workflow increased platform stickiness and has driven higher risk trading, which we can monetize. Across our top 10 compression clients as they have picked up their compression flow, this has also led to a material pickup in the amount of risk volumes put through the platform.

Additionally, our top five compression clients have maintained or improved their overall risk flow ranking over the last year. And with that, let me turn it over to Sara to discuss our financials in more detail.

Sara Furber: Thanks, Tom, and good morning. As I go through the numbers, all comparisons will be to the prior year period, unless otherwise noted. Slide 13 provides a summary of our quarterly earnings performance. As Billy recapped earlier, this quarter, we saw record revenues of $370 million that were up 26.3% year-over-year on a reported basis and 24.6% on a constant currency basis. Specifically, we derived approximately 37% of our fourth quarter revenues from international customers. And recall that approximately 30% of our revenue base is denominated in currencies other than dollars, predominantly in euros. Our variable revenues increased by 35% and total trading revenues increased by 27%. Total fixed revenues related to our 4 major asset classes were up 7% on a reported and 5.5% on a constant currency basis.

Rates fixed revenue growth was driven by the addition of new dealers across our mortgage specified pools platform and our U.S. treasury streams and CLOB protocols. Credit fixed revenue growth was driven by the previously disclosed dealer fee increases, which we instituted at the start of the fourth quarter. And other trading revenues were down 6%. As a reminder, this line fluctuates as it reflects revenues tied to periodic technology enhancements performed for our retail clients. Full year 2023 adjusted EBITDA margin of 52.4% increased by 49 basis points on a reported basis and 100 basis points on a constant currency basis from the full year 2022. Moving on to fees per million on Slide 14 and a highlight of the key trends for the quarter. You can see Slide 20 of the earnings presentation for additional detail regarding our fee per million performance this quarter.

Overall, our blended fees per million decreased 15% year-over-year, primarily due to a shift away from cash rates and a decrease in cash credit and cash equities fee per million. For cash rate products, fees per million were up 2%, primarily due to an increase in the European government bond fee per million. For long-tenor swaps, fees per million were down 29% primarily due to an 8% decline in duration year-over-year and an increase in compression trades. This was partially offset by growth in emerging markets, European swaps and our RFM protocol. For cash credit, average fees per million decreased 4% due to a mix shift away from munis, partially offset by an increase in European credit fee per million. For cash equities, average fees per million decreased by 6% due to a reduction in U.S. ETF fee per million, given an increase in notional per share traded.

Recall in the U.S., we charge per share and not for notional value traded. Finally, within money markets, average fees per million increased 3%, driven by an increase in U.S. CDs fee per million. Slide 15 details our adjusted expenses. At a high level, the scalability and variable nature of our expense base allows us to continue to invest for growth and grow margins. We have maintained a consistent philosophy here. Adjusted expenses for the fourth quarter increased 24.7% on a reported basis and 20.7% on a constant currency basis. Compensation costs increased 30.7% due to increases in head count and performance-related compensation. Technology and communication costs increased 24.8%, primarily due to higher data fees and our previously communicated investments in data strategy and infrastructure.

Professional fees decreased 18%, mainly due to a decrease in legal fees. And adjusted general and administrative costs increased due to a pickup in marketing and philanthropy and unfavorable movements in FX. Unfavorable movements in FX resulted in a $500,000 loss in the fourth quarter of '23 versus a $2.6 million gain in the fourth quarter of '22, a delta of over $3.1 million between the fourth quarter of '23 and '22. Slide 16 details capital management and our guidance. On our cash position and capital return policy, we ended the fourth quarter in a strong position with $1.7 billion in cash and cash equivalents. Free cash flow reached approximately $684 million for the trailing 12 months, up 19% year-over-year. We spent $90 million in cash as partial consideration for r8fin on January 19 of this year.

Our net interest income of $20.3 million increased due to a combination of higher cash balances and higher interest yields. This was primarily driven higher by recent Fed hikes and more efficient management of our cash. Non-acquisition CapEx and capitalized software development for the quarter was $12.2 million, with the decrease driven primarily due to the timing of our investment spend. With this quarter's earnings, the Board declared a quarterly dividend of $0.10 per Class A and Class B common stock, an increase of 11.1% year-over-year. The Board periodically evaluates our dividend along with the consistency of our earnings and free cash flow generation over time. And finally, there were no share repurchases during the fourth quarter of 2023 under our share buyback program as we already offset equity-related dilution early in the year.

This leaves approximately $239.8 million at the end of the quarter authorized for future deployment. Turning to guidance for 2024. We will continue to invest in 2024 and are expecting adjusted expenses to range from $755 million to $805 million. Excluding the impact of acquisitions, the midpoint of this range would represent an approximate 10% increase in line with our average expense growth from 2016. We believe we can drive adjusted EBITDA and operating margin expansion compared to 2023 at either end of this range, although we expect the incremental margin expansion to be more modest relative to last year as overall margins are higher, and we continue to focus on balancing margin expansion with investing for the future. As compared to the first half of last year, we expect to accelerate investments given the anticipated healthy revenue environment.

We continue to invest for the future with credit rates and emerging markets as key focus areas with a long runway for growth. We also continue to invest in technology that allows us to sustain and build our leading platform. Some of these investments will take some time to scale, but we continue to price innovation and have a technology pipeline that continues to grow. We expect professional fee expenses to be above the first quarter of '23 levels as we continue to augment our technology effort with consultants. For forecasting purposes, our assumed non-GAAP tax rate ranges from 24.5% to 25.5% for the year. The primary driver of the increase in our tax rate is related to the revenue mix skewing towards higher tax states. We expect CapEx and capitalized software development to be about $75 million to $83 million.

We estimate that approximately 60% will be spent on software development to support our growth initiatives and approximately 40% will be related to growth and maintenance CapEx. The midpoint of our CapEx guidance implies roughly a 28% year-over-year increase, primarily due to the acquisitions of Yieldbroker and r8fin. Excluding these M&A-related investments and other onetime spend, the midpoint growth would be approximately 15% year-over-year. Acquisition and Refinitiv transaction-related D&A, which we adjust out due to the increase associated with pushdown accounting, is expected to be $142 million. As we highlighted last quarter, we continue to expect 2024 and 2025 revenues generated under the new master data agreement with LSEG to be approximately $80 million and $90 million, respectively.

Now I'll turn it back to Billy for concluding remarks.

Billy Hult: Thanks, Sara. As I embark on my 24th year at Tradeweb and my second year as CEO, we continue to see ample opportunity to grow our One Tradeweb mantra and build better markets for the future. We are focused on ensuring our D&A continues to evolve as we remain in the catbird seat as we look to innovate and find new ways to modernize the fixed income markets. Innovation, collaboration and transformation are at the core of our DNA, and I continue to be excited about the road ahead. On that note, we reported strong January volumes yesterday which translated into revenue growth in January in excess of 20% year-over-year. I would like to conclude my remarks by thanking our clients for their business and partnership in the quarter, and I want to thank my colleagues for their efforts that contributed to our record quarterly volumes and revenues at Tradeweb. With that, I will turn it back to Ashley for your questions.

Ashley Serrao: Thanks, Billy. [Operator Instructions] Operator, you can now take our first question.

Operator: [Operator Instructions] Our first question will be coming from Christopher Allen of Citi.

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