Thanks, Sonya. Thank you, everyone, for joining us today. I'd like to use the expression that the growth of our business is equal to alpha plus beta times macro. The idea behind this classic formula is relevant to every business, but especially important for understanding our results and outlook today. Since laying out our 2026 focus areas earlier this year, I couldn't have asked for better execution. The team has delivered durable compounding growth from technology and marketing advances at an exceptional rate. At the same time, our business is sensitive to macro conditions, particularly borrower health and interest rates. Those became a sizable headwind in Q3 and have gotten worse to start Q4. Looking back over the past few months, I've landed on 3 conclusions I want to share with you today. First, I'm proud of the team and our delivery in Q3. Our results were strong by just about any measure and exceptional when accounting for macro. Second, we expect a mixed finish to the full year relative to our original guidance. We see fee revenue and contribution profit finishing higher, but total revenue and adjusted EBITDA finishing lower. That's because macro has an outsized impact on revenue derived from our balance sheet. Third, I am more confident than ever in Upstart's long-term trajectory. That's not just obligatory CEO optimism. Macro comes and goes, but alpha compounds, and our results are proving we can deliver it. Let's talk about each conclusion, starting with Q3 results. Contribution profit, our best single measure of profitable growth in new originations, reached $218 million in Q3. That's up 48% year-over-year, a new record, breaking the one we set just last quarter. This result is strong, but it understates the underlying progress in the business. That's because our Q3 numbers, starting with origination volumes and cascading down the P&L, were held back by a sizable macroeconomic headwind. The Upstart Macro Index, or UMI, is our estimate of how macroeconomic conditions affect defaults on our personal loans. It averaged 1.5 in Q3, up from 1.41 in Q2, and we underwrote proportionately more conservatively. The explanation is likely pretty simple. Annual inflation reaccelerated to 3.7% with prices rising twice as fast as wages over the past quarter. Not surprisingly, consumer delinquencies have risen across a range of third-party measures. The share of all Americans at least 30 days late on any credit obligation jumped to over 19% in September, the highest level in years. Without that 9-point increase in UMI, we estimate Q3 originations would have been at least $370 million higher. In that scenario, year-on-year origination growth would have been 57% and contribution profit growth 61%. We earned that alpha in 2 places. In core personal loans, we improved the models, user experience and borrower ecosystem. In secured, we improved automation, conversion and monetization in pursuit of profitability. In Q3, we added over 140 new features to our core underwriting model, including numerous proprietary signals of how consumers engage with our platform before they take a loan. Combined with improvements to our algorithms and training process, our model's accuracy lead over a traditional credit scoring benchmark widened again. Our model is now 2.77x as accurate, and 87.27% of the inaccuracy gap is still ahead of us. That's our runway. We also use better models to reach more people. Our marketing programs and user experiences drove more than 1 million people to apply for an Upstart loan for the first time this quarter, bringing the cumulative number of unique Americans who have applied for an Upstart loan to more than 25 million, all while lowering our cost of customer acquisition. More than 555,000 unique Americans took out loans in Q3, a new record. And they are more likely than ever to come back. Over 250,000 of them were returning customers who had already borrowed with us before. Now to Secured products. We told you we wanted to be contribution margin positive by the end of the year. The team went all in and got it done in Q3. Secured contribution margin was a positive 17%, an improvement of more than 50 percentage points sequentially. I'll give a few examples of how we got there. First, we sold more of our secured loans to third-party capital partners and at better terms. Second, we increased the level of automation across our secured products. In home, nearly 40% of funded loans were fully automated with no human intervention by Upstart, up from less than 5% a year ago. In auto-secured personal loans, we significantly increased the fully automated rate over the last year from 4% to 21%. Third, in Auto Retail, we began optimizing dealer compensation around where we create the most differentiated value, and we rebuilt our credit application, increasing end-to-end conversion by 31%. These are young products in enormous markets. After locking in our margin gains this year, we'll gradually shift our focus back to growth in 2027. As we do that, we intend to hold secured contribution margin consistently positive between breakeven and 25% quarter-to-quarter as we refine our approach to growth in each category. Longer term, we expect those margins to resume their march upward as we create increasing differentiation and value for our customers, just as they did historically in core personal loans. Our other major focus this year has been capital efficiency. Loans held directly on our balance sheet declined to 4.8% of total loans outstanding in Q3. More than 95% of all Upstart-powered loans outstanding are now third-party funded with the bulk coming from committed partnerships. In exchange for commitments of up to 2 years, we co-invest in sharing the performance of those loan cohorts. Those partnerships are designed to make our funding base resilient through market cycles. Our priority now is reducing the share of equity capital our loan funding requires from us. Over the past year, we grew outstanding loans across the platform by 38% while increasing equity used only 7%. That's a good start, and we intend to keep going. Another project relevant to our capital efficiency is Upstart Bank. We are on track to open Upstart Bank in early 2027, subject to the remaining regulatory approvals. When that happens, we plan for most of the loans on Upstart's balance sheet today to move to the bank and become deposit funded, which will unlock net cash rather than consume it. As such, we expect capitalizing the bank will require no incremental equity capital. Once open, Upstart Bank will provide the many benefits we've previously shared, expanding our market reach, reducing operational complexity and providing more efficient financing for certain loans. As we've said before, it will not change our strategy of funding the vast majority of loans via third-party capital. Now let's turn to our outlook for the full year. In February, we guided to total revenue of $1.4 billion and adjusted EBITDA of $294 million. This assumed UMI went no higher than 1.5 and interest rates were flat or down. Since then, UMI has climbed 14 points from 1.39 to 1.53, while the 2-year Treasury yield has jumped by more than 115 basis points as of the end of October, with around half of that increase happening in September alone. Those are large moves, and I want to put them into context. We have previously shared our estimate that a 5-point increase in UMI, for example, from 1.4 to 1.45 reduces our daily originations by roughly 5% to 10%. Higher funding costs have a similar effect. Put simply, for each 1 point increase in UMI or 10 basis point increase in funding costs, we'd expect daily originations to fall by roughly 1% to 2%. This heuristic applies to our primary business model of earning fee revenue from new originations. But there is an additional way that macro impacts our P&L, and that is via the loans and co-investments on our balance sheet. Because these positions were accumulated over many quarters, they are relatively large. As a result, an increase in UMI causes a significant reduction in fair values and net interest income. The impact to total revenue and profit from this is actually larger than the impact from reducing new originations. Higher interest rates also lower fair values, albeit to a much lesser extent. Combined, these effects have created a substantial macro headwind for us. Without that pressure, we believe the full year will be trending well ahead of our original guidance on every line. As it stands, we've outrun the macro on the metrics tied to new originations and now expect full-year fee revenue and contribution profit to modestly exceed our original guidance. However, income from the balance sheet is tracking well below our initial outlook. In addition to being more sensitive from macro, as I just explained, this line item, unlike fee revenue, does not benefit from most of our advances in technology and marketing. As a result, we now expect full year total revenue of approximately $1.35 billion and adjusted EBITDA of approximately $260 million. This updated outlook assumes UMI does not exceed 1.55 through year-end and no material change to 2-year Treasury yields from current levels. Finally, I said I'm more optimistic than ever about the long term. It may sound like an odd conclusion to draw when macro is worsening and we're missing on profit, but it's the truth. I'll say it again, growth equals alpha plus beta times macro. Mathematically, alpha is the difference between actual results and the results you'd expect from macro alone. Our nominal contribution profit accelerated to 48% year-over-year in Q3, well above what is implied in our multiyear guide. Without the increase in UMI, we estimate it would have been at least 61%. On a full year basis, it is remarkable, frankly, that despite the 14-point increase in UMI and over 115 basis point increase in interest rates, we still expect to generate more fee revenue and profits from new originations than we expected at the start of this year. Beta. Beta is the sensitivity of our balance sheet-derived income to macroeconomic conditions, and it is high today. Fortunately, we're already bringing it down as we reduced the ratio of Upstart equity dollars required to total loans funded. We expect that will continue. Macro bounces around. Sometimes it's a plus, sometimes it's a minus. UMI has gone down in exactly 15 of the last 30 quarters. Same for interest rates. My own view on macro reminds me a little of Warren Buffett's New York Times piece in 2008 called "Buy American. I Am." American borrowers are hurting this year because inflation flipped real wage growth negative. But this is the United States. People get back on their feet, real wages rise over time. The macro will take care of itself. Most importantly, we're proving the Upstart engine. Execution against our years-deep technology and marketing road map delivers alpha at an exceptional rate. Keep compounding that, and I believe no matter what, Upstart becomes an extremely large and profitable company. With that, I'll turn the call over to Andrea.