Thank you. Good afternoon, and thank you for joining us for our third quarter 2021 earnings call. Once again, Thomas is on the call, but asked me to present his comments on the business. He will handle the Q&A. 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. In the third quarter, we once again reached a record number of accounts, 1,536,000. Our year-over-year account growth of 57% was nearly equal in all three of our geographic regions. The markets continued to be constructive for us, but more normalized than they were last year driving commissions to $311 million, the second highest we have ever reported only exceeded by this year's hyperactive first quarter. While our GAAP reported net revenues were $464 million, our adjusted net revenues of $650 million were also our second highest on record, again surpassed only by the first quarter. The $186 million adjustment to net revenues was virtually all due to the depreciation of Tiger Brokers' stock price. We invested in Tiger at a blended price of less than $3 a share in 2018 and 2019 to help them gather enough capital to enter into the brokerage business on the large scale they wanted using our platform as an introducing broker. Since that time, the stock has traded as high as $38 and as low as $3, and at quarter end, our gain on this investment was about $80 million. Even though this started out as a relatively minor investment, it certainly has provided a lot of unintended distraction to our investors who look at our financials. With the new focus on the part of the Chinese government on data security, we now expect the stock to keep swinging for a while until they come to a clear understanding with the regulator of what is required and how to get there. Our financial performance underscores the strength of our platform and of our focus on automating as much of the brokerage business as possible. This gives us the ability to maximize our product and service offering while minimizing our costs. Automation to us means that our 1.5 million customers from all over the world can interact and trade securities, commodities and currencies with each other across 141 trading venues in many jurisdictions under different rules, seemingly from one account. This is not easy. And it is the reason that not all products on our platform are available for all users, such as crypto, which is not yet available to many of our non-U.S. customers, but we are working hard on that. We just yesterday enabled registered investment advisors to add small crypto positions to the investment portfolios of clients who requested it, which we are told happens ever more often. Automation also enables us to generate upon request, a single, nicely compiled investment report that not only summarizes your holdings and returns and the risk you have been taking but does so across continents and products and currencies. And you can even custom tailor it for yourself or for your customers, column by column. We've even added the capability to include assets that are custodied elsewhere and incorporate them into this report no matter what country or major currency they are in. We continue to see active trading among our client base. To give a sense of this, in the third quarter of 2019, our equity volume was 41 billion shares. In the third quarter of 2020, it was 86 billion shares. This quarter, it reached 172 billion shares. Third quarter total DARTs of 2.3 million were the third highest in company history, following the first two quarters of this year, as existing clients continue their activity and new clients begin to participate. Client investing confidence can also be seen in our customer margin loans, which reached a record $50.2 billion, up 67% from last year. We continue to see our clients putting their available funds to work. $50 billion of margin loans represents about 6% of all outstanding industry margin loans, even though we only hold less than a fraction of 1% of all investable assets. This is also remarkable because our margin lending policies are comparatively conservative, and we automatically liquidate positions and accounts that come into violation of these policies. The reason for our high margin balance is that we only charge 0.75% to 1.56% to IBKR Pro customers for margin loans. This policy is a major draw for sophisticated traders to trade often and use leverage. The more our clients participate, the stronger we become. Our reported pretax profit margin was 50% and adjusted for non-core items was 65%. We know of no other broker who can claim profit margins close to this. Our new account growth remains quite positive ahead of both prior year and prior quarter adds. Investor confidence and activity are strong across the globe in all regions as we emerge from the pandemic. This activity continues to be led more by individual investors who tend to stay with us, especially internationally, because we offer a broad product range in the lowest cost to those investors, and there are many who wish to invest globally. This breadth is one of our strategic advantages, one that is extremely difficult to offer. For any broker providing market access can be expensive and complex. To do so globally with compliance, legal, currency, and tax and reporting requirements that vary by market is even more so. Having all this automated is our competitive advantage. Three quarters of our accounts are international in rapidly growing markets. Even as we come through this period of COVID, global interest in the markets that began early last year continues. People have grown comfortable doing more and more of their financial business electronically. They have grown more connected to financial markets, institutions and each other online, which in turn drives even more people to participate. This, along with our continuing dedication to add more products and services to our platform is why we believe year-over-year growth of total accounts can be at least 30% going forward indefinitely. Once again, all client segments and geographies showed strong account adds with all regions showing greater than 55% year-on-year account growth. Now, I will go over our five client segments. Individual customers who made up 64% of our accounts, 37% of our client equity, and 54% of our commissions continued their remarkable run of growth with 12-month account growth of 79%, client equity growth of 57%, and commissions of 35%. All geographic regions we serve saw growth in individual accounts of over 70% with European accounts topping all regions with over 90% growth. This underscores what we always say, it is important to provide a reliable platform that is global because people around the world want to maximize their opportunities to invest in the variety of ways they prefer. Hedge fund customers also continued to grow. For the 12 months ended September 30, we saw 4% hedge fund account growth, 41% customer equity growth, and 4% commission growth. We continued to add growing and larger hedge funds, which can be seen in the particularly robust growth in client equity in this segment. Hedge funds represent 1% of our accounts, 7% of our client equity, and 6% of our commissions. According to Preqin, we moved from eighth to seventh place as the prime broker servicing the most single manager hedge funds. We are in first place as the prime broker servicing the most hedge funds with under $50 million in AUM. And for the second year in a row, we are the fastest-growing prime broker. Proprietary trading firms are 2% of our accounts, 9% of our client equity and 12% of commissions. For the quarter, this group grew by 36% in accounts for the 12-month period, 44% in client equity and 19% in commissions. All regions saw strong growth. We are seeing particular success in this segment in Europe as more prop trading firms open and new and existing firms move to us due to our unusually diverse international product base, to capitalize on our reputation for seamless, efficient and favorable trade executions and as investors seek to counterbalance negative interest rates in the EU. Financial advisors are 9% of our accounts, 17% of our customer equity and 10% of our commissions. This group grew accounts by 19% for the 12-month period, customer equity by 41% and commissions by 7%. Account and client equity growth in this segment tends to be higher than commission growth as advisors typically tend to trade more conservatively. More larger advisor firms are beginning to try Interactive Brokers for our adaptable account structures where you can manage hedge funds, SMAs and regular client accounts under one master and invest across the world in a wide variety of products that now includes crypto. And RIA can use a rich set of tools and capabilities and with our dedicated client service desk for advisors, we continue to get better and capture more business globally. Our final segment is introducing brokers. These represent 25% of our accounts, 30% of our client equity and 17% of our commissions. IBroker segment account growth was 31% for the latest 12 months, with client equity up 59% and commissions up 97%. Offering the ticket of global access to their customers is critical for brokers looking to grow their business. Worldwide, new brokers starting up and existing brokers looking to extend the breadth and depth of their offerings turn to our platform for its global trading and seamless back-office functionality. With the worldwide growth in investors who want global access, introducing brokers know that their best opportunity to succeed is to partner with us to provide it. Much was done to enhance and improve our platform this quarter. We eliminated monthly inactivity fees, part of our ongoing commitment to provide low-cost training solutions. We introduced Bitcoin early last month in response to client demand. Over the next few months, we will be broadening both the regions and types of customers and coins available on our platform. We are very proud of the great advances we have made in building out our compliance systems and staff, in a group that now numbers 350 across the many regional brokerage subsidiaries we have around the world, each with its own unique rules and regulations. We've increased the yield on our advertising dollars, to a point at which it is becoming profitable to spend more. We have grown our sales force, and they are gaining stride. As Interactive Brokers becomes better known for the sophistication and diverse capabilities of our platform, along with our industry low pricing, it is easier and easier for them to attract new and larger customers. The growing controversy and focus on payment for order flow is to our advantage. Due to our unique position in the PFOF space, where we provide either zero commissions or executions at a small commission crossing at usually better prices in our ATS, we have a great opportunity to attract more institutional flow. They love to trade against our often overseen retail flow in between the NBBO, where both sides benefit. All in all, it is a thrill for us to keep building new things and adding more and more products and capabilities and to offer it to an ever-growing audience at the same time. It feels like our opportunities are, for the moment, unlimited, but we must hurry because the empty unserved product space is filling in quickly. With that, I will turn the call over to our CFO, Paul Brody, who will go through the numbers for the quarter. Paul?