Thank you. Good afternoon. And thank you for joining us for our year-end 2020 earnings conference call. Once again, Thomas is on the call and will handle the Q&A, but asked me to present the rest of his comments. As a reminder, today's call may include forward-looking statements, which represent the company's belief regarding future events, which, by their nature, are not certain and are outside of the company's control. Our actual results and financial condition may differ, possibly materially, from what is indicated in these forward-looking statements. We ask that you refer to the disclaimers in our press release. You should also review a description of risk factors contained in our financial reports, filed with the SEC. 2020 was a year of unprecedented worldwide investor engagement with the markets, and Interactive Brokers capturing a large piece of it. We ended the year with a record 1,073,000 accounts, up 56% over last year. In 2020, we opened over 383,000 net new accounts, three times that of our previous record. Client equity grew 66% to $289 billion. Trading activity continued strong all year, with active customer trading levels. Total DARTs began to increase last January and doubled over the course of the year to 2.1 million per day. Per account, DARTs rose from 266 last year to 459 this year. Growth came from a broad range of geographies and customer types, from our geographically diverse sales team and from strong word of mouth. In many countries, we have now grown to a large enough size in terms of accounts that word of mouth leads to meaningful growth from the clients who use and recommend us to their friends and colleagues. As more people want to participate in the markets, invest globally and diversify their holdings, they look to their more experienced friends who have found at Interactive Brokers the access and variety of securities they are looking for. They then see what we offer and sign up. In many regions, this global access can often be found nowhere else or, if it can be found, comes only at an unreasonably high price. While accounts in the United States have doubled since 2015, outside the U.S., they are up more than four times, meaning we are less dependent on the U.S. or in any one country for our future. The U.S. now accounts for 26% of our total accounts, down from nearly half five years ago. Challenges met this year, include the impact of the COVID pandemic on our clients and staff, the impact of a cash settled contract closing at a negative price, the effect of Brexit on our European business and the conclusion of our ongoing conversations with regulators. Regarding COVID, while it has led to a resurgence of interest in the market, as people at home look for something constructive to do, it has also meant the majority of our staff works from home. As a technology company, we are uniquely well positioned to handle this and have not seen interruptions or issues in our business because of it. I'm happy to say, that thanks to tremendous effort on the part of regulators and our team in Europe, we received our approvals before the Brexit deadline, and have been able to migrate accounts to our new operations in Luxembourg, Hungary and Ireland. We are looking forward to working in these countries and expanding our European business further. On WTI, we have spoken about it on previous calls. We are completing programming for negative prices in all product categories in case this or similar first ever event occurs again. We have spent a great deal of time and effort coordinating with multiple regulators, including the CFTC, SEC, and FINRA and working with consultants to make sure our solutions and protocols are satisfactory. We have hired the necessary people and put most of these changes into place as we work on the last remaining items. The costs associated with this, which were spread over several quarters, should now start to ease, while the cost of compliance with regulatory regimes in Hong Kong, Australia, Canada, and the EU are now picking up. Our commissions were up 71% in the fourth quarter and up 58% for the year to $1.1 billion. Despite zero interest rates around the globe and the introduction of zero commissions in late 2019, our total net revenues for the fourth quarter were up 20% and for the year, up 15% to $2.2 billion. Our pretax margins were also strong at 65% for the fourth quarter and 57% for the year. Excluding non-core items, pretax margins were 65% for the fourth quarter and 61% for the year. There is no other broker we know of who comes close to our levels of profitability and we achieved these margins while offering state-of-the-art technology and global access. Now, I will go over our five client segments. Individual customers were the clear stars in 2020, posting the strongest account growth of all our client segments, up 77%, with 71% growth in client equity and 69% growth in annual commissions. Individuals now make up 57% of our accounts, 36% of our client equity and 54% of our annual commissions. All geographic regions in this segment experienced significant growth, particularly in Europe and Asia. We continue to see investor demand for global access and wide product choice with the global pandemic and more time at home, acting as tailwinds, encouraging investors large and small, that this is an opportune moment to enter the markets. While we call this segment individual, it incorporates a wide range of clients from new smaller investors buying their first stocks to larger and more sophisticated ones, trading equities and derivatives multiple times a day in several countries. Our platform can serve all of them and help them to achieve better returns by minimizing their costs. Introducing brokers was our next fastest-growing segment, with account growth of 42% and client equity growth of 115% and 12-month commission growth of 121%, introducing brokers are now 29% of our accounts, 30% of our client equity, and 13% of our commissions. As with Individuals, introducing brokers were strong in all geographic areas, particularly in Europe and especially in Asia, with similar tailwinds to individuals, the desire by investors to open accounts, especially internationally, and to participate in the market. These accounts are basically also individual accounts with a broker between IBKR and the individual account holder. In exchange for a smaller commission, we can pass on to the broker, the direct communication with the customer and of course, it is the broker who recruits the customer. Small, mid-sized, and start-up brokers continue to find it difficult to build and maintain complex technology involved in offering the global access and product offerings their customers want. So, they come to us to white brand our state-of-the-art technology and capitalize on our low cost. As competitive pressures increased and as agencies in various countries increase their compliance oversight of the financial services industry, complexity rises over time, encouraging more brokers to come to or to start up with us. Hedge funds constitute 1% of our account, 7% of client equity, and 7% of our annual commissions. In 2020, we saw a growth from hedge funds of 2% in accounts, 34% in client equity, and 21% in 12-month commissions. We achieved this growth despite the hedge fund industry overall experiencing a third consecutive year of fund outflows. Hedge funds remain a large multi-trillion dollar global market, and we continue to have room to grow in this area. Proprietary trading firms are 2% of our accounts, 9% of client equity, and 14% of yearly commissions. For the year, this group grew 28% in accounts, 44% in client equity, and 43% in commissions. Despite already being well-penetrated in this segment, our continued growth here means that our platform demonstrates value and appeal for sophisticated traders and their larger accounts. Finally, we have financial advisers. They are 12% of our accounts, 17% of our customer equity, and 12% of annual commissions. Accounts in this group grew by 17%, client equity by 28%, and commissions by 18%. Several factors will continue to drive this business. Our Greenwich Compliance Group, which provides registration and compliance assistance for new and existing RIAs, continues to sign up RIAs who want to open their own businesses or move from an existing clearing firm. Going independent means RIAs can keep all the fees they earn. As more advisors look to become independent, our low commission and financing rates, wide variety of mutual fund families offered and the availability of Greenwich Compliance's service contribute to growth in this segment. Second, with consolidation among our competitors, many advisors do not want to compete for clients with their clearing firm or be subject to the hidden fees that always seem to pop-up. We welcome all of them with transparent pricing, no competing products or in-house advisors, free portfolio performance reporting, a free CRM and global market access. Although, we do not yet feel in growing numbers of advisors, our sales force is getting a large number of inquiries from advisors looking for a new platform and from advisors hoping to become independent in the near future. There is a great deal that we are looking forward to in 2021. We have recently rolled out and will continue to broaden our impact dashboard. The dashboard allows our clients to select the ESG criteria most important to them, so they can identify and invest in those companies that share their values. It also analyzes clients' portfolios and calculate an overall score to see how well their portfolios align with the values most important to them. We are also excited about our mutual fund marketplace, which offers 37,000 funds, all with no custody fee to our clients around the world. Because we do not offer our own funds, we do not compete against our clients. To close, when we started our brokerage business in 1993, we thought a good goal to have, one that would motivate us, but seem like a distant target far in the future would be to achieve 100,000 accounts on our platform. We reached that in 2008, 15 years later. We thought again about what an achievable but distant goal would be and came up with one million accounts. I'm happy to say we achieved that goal in October, 12 years later. Our goal now is 80 million accounts or 1% of world population. How long will that take? We are not sure, but think 10 to 15 years. It is encouraging that there is one country today, which I'm not going to name, where we have accounts from over 1% of its population. This is a high target. Similar to our earlier goal, it is a ways away, but can be achieved. If we continue to automate and attract customers by giving them the tools, low pricing and global product access they need to succeed. With that, I will turn the call over to our CFO, Paul Brody, who will go through the numbers for the quarter. Paul?