Praxis Stock Surges 320% as One Biotech Investor's Buy Pushes Stake to Nearly $600 Million

Praxis Precision Medicines targets neurological and psychiatric disorders with a pipeline of precision therapies for CNS conditions.On February 17, 2026, Perceptive Advisors disclosed a significant buy of 431,432 shares of Praxis Precision Medicines (PRAX +0.88%), with an estimated transaction value of $80.34 million based on quarterly average pricing, according to its latest SEC filing.What happenedAccording to a February 17, 2026, SEC filing, Perceptive Advisors LLC increased its stake in Praxis Precision Medicines (PRAX +0.88%) by 431,432 shares during the fourth quarter of 2025. The estimated value of this trade was approximately $80.34 million, calculated using the mean unadjusted close price for the period. The quarter-end value of the position increased by $505.38 million, reflecting both the share purchase and subsequent stock price movement.What else to knowTop five holdings after the filing:NASDAQ:PRAX: $588.30 million (10.8% of AUM)NASDAQ:CELC: $315.20 million (5.8% of AUM)NASDAQ:RYTM: $272.57 million (5.0% of AUM)NASDAQ:ASND: $230.60 million (4.2% of AUM)NASDAQ:APGE: $175.92 million (3.2% of AUM)As of February 17, 2026, Praxis Precision Medicines shares were priced at $328.04, up a steep 320% over the prior year.Company overviewMetricValuePrice (as of market close February 17, 2026)$328.04Revenue (TTM)$7.46 millionNet income (TTM)($273.04 million)Company snapshotPraxis Precision Medicines develops clinical-stage therapies for central nervous system disorders, with a pipeline including PRAX-114 for major depressive disorder and PRAX-944 for essential tremorThe firm operates a biopharmaceutical business model focused on research, clinical development, and out-licensing or commercialization of proprietary drug candidatesIt targets healthcare providers, specialists in neurology and psychiatry, and patients with neurological and psychiatric conditionsPraxis Precision Medicines is a Boston-based biotechnology company specializing in the development of novel therapies for disorders characterized by neuronal imbalance. With a focused pipeline addressing major depressive disorder, essential tremor, and rare epilepsies, the company leverages proprietary research and strategic collaborations to advance its candidates through clinical stages. Praxis differentiates itself through its emphasis on precision medicine and targeted central nervous system treatments, aiming to address unmet medical needs in neurology and psychiatry.What this transaction means for investorsWhen a biotech crosses from pipeline story to pending commercial launch, portfolio weightings tend to change fast, and that is exactly what is happening here.Praxis has now submitted two NDAs to the FDA, one for ulixacaltamide in essential tremor and the other for relutrigine in SCN2A and SCN8A DEEs. Management is openly preparing for commercialization and scaling inventory ahead of potential approvals. The company ended 2025 with $926 million in cash and investments and added $621 million in January financing, extending its runway into 2028.That balance sheet matters. It gives Praxis flexibility to launch without immediately returning to capital markets. Meanwhile, research and development spending climbed to $267 million for 2025, reflecting a late-stage push across multiple programs.At 11% of assets, this is the largest disclosed holding. It sits well ahead of Celcuity and Rhythm, reinforcing a preference for CNS and specialty biotech with near-term catalysts. Long-term investors should focus less on the 320% one-year move and more on execution risk. Two NDAs, Phase 3 readouts in 2026, and a defined cash runway create a high-upside setup, but for a firm with lofty expectations.About the AuthorJonathan Ponciano is a contributing stock market analyst at The Motley Fool. He has nearly a decade of experience as a financial journalist, most recently as an editor and senior reporter at Forbes focused on markets, technology, and entrepreneurship. Jonathan has also written for Investopedia and the Los Angeles Business Journal. He holds a dual B.A. in Business Journalism and Economics from the University of North Carolina at Chapel Hill and an M.B.A. from Columbia Business School. A North Carolina native now based in New York City, Jonathan has also lived in Mexico City and Los Angeles.CMFjonponcStocks MentionedPraxis Precision MedicinesNASDAQ: PRAX$334.54 (+0.88%) $+2.93*Average returns of all recommendations since inception. Cost basis and return based on previous market day close.