Notice: This company has been marked as potentially delisted and may not be actively trading. NASDAQ:PTI Proteostasis Therapeutics (PTI) Stock Price, News & Analysis Add Compare Share Share Stock Analysis Stock AnalysisTrends About Proteostasis Therapeutics Stock (NASDAQ:PTI) 30 days 90 days 365 days Advanced Chart Get PTI alerts:Sign Up Key Stats Today's Range N/A50-Day Range$1.00▼$22.4252-Week Range N/AVolume9,405 shsAverage Volume1.04 million shsMarket Capitalization$37.57 millionP/E RatioN/ADividend YieldN/APrice TargetN/AConsensus RatingN/A Company OverviewProteostasis Therapeutics, Inc., a clinical stage biopharmaceutical company, engages in the discovery and development of novel therapeutics to treat cystic fibrosis. The company's lead product candidates for the treatment of CF include PTI-801, a cystic fibrosis transmembrane conductance regulator (CFTR) corrector agent; PTI-808, a CFTR potentiator; and PTI-428, a CFTR amplifier. It has collaboration agreements with Cystic Fibrosis Foundation, Inc. to research, develop, and commercialize products for the treatment of CF, non-classical CF, and other pulmonary diseases in the United States or the European Union; and Genentech, Inc. for licensing the technology and materials relating to therapeutic small molecule modulators. The company was formerly known as Proteoguard, Inc. and changed its name to Proteostasis Therapeutics, Inc. in September 2007. Proteostasis Therapeutics, Inc. was founded in 2006 and is headquartered in Boston, Massachusetts.Read More… Receive PTI Stock News and Ratings via Email Sign-up to receive the latest news and ratings for Proteostasis Therapeutics and its competitors with MarketBeat's FREE daily newsletter. Email Address PTI Stock News HeadlinesUnlocking proteostasis: A new frontier in the fight against neurodegenerative diseases like Alzheimer'sJanuary 3, 2025 | msn.comHarness Therapeutics Appoints Seasoned Biopharmaceutical Leader, Ms. Meenu Chhabra Karson, as Board ChairApril 24, 2024 | globenewswire.comThe Real Hillbilly ElegyThe mountains of Appalachia are incredible to behold. Spanning thousands of miles across Alabama, Kentucky, Tennessee and beyond… It's one of our country’s most scenic areas. But hidden beneath the beauty is an ugly reality: our most beautiful land is also the poorest. It’s a tragedy because for over 200 years, generation after generation has worked “coal country” with nothing but a pick and shovel, hauling billions of dollars from the ground.February 22, 2025 | Porter & Company (Ad)Greensboro joins incentive offers for $55M Honda expansion at PTI; Guilford County up nextJuly 20, 2023 | bizjournals.comFederal Police Summons India Minister in Bribery Probe, PTI SaysMarch 13, 2023 | bloomberg.com7 years later, probation and PTI for pair in North Bergen low-show/no-show job schemeOctober 6, 2022 | nj.comImplied Volatility Surging for Proteostasis Therapeutics (PTI) Stock OptionsOctober 26, 2021 | finance.yahoo.comSee More Headlines PTI Stock Analysis - Frequently Asked Questions How were Proteostasis Therapeutics' earnings last quarter? Proteostasis Therapeutics, Inc. (NASDAQ:PTI) posted its quarterly earnings data on Monday, November, 16th. The company reported ($0.16) earnings per share for the quarter, topping the consensus estimate of ($0.17) by $0.01. When did Proteostasis Therapeutics IPO? Proteostasis Therapeutics (PTI) raised $51 million in an initial public offering on Thursday, February 11th 2016. The company issued 3,900,000 shares at a price of $12.00-$14.00 per share. Leerink Partners and RBC Capital Markets acted as the underwriters for the IPO and Baird and H.C. Wainwright & Co. were co-managers. What other stocks do shareholders of Proteostasis Therapeutics own? Based on aggregate information from My MarketBeat watchlists, some other companies that Proteostasis Therapeutics investors own include BHP Group (BHP), Idera Pharmaceuticals (IDRA), OPKO Health (OPK), Sorrento Therapeutics (SRNE), Bristol-Myers Squibb (BMY), Rite Aid (RAD) and Company Calendar Last Earnings11/16/2020Today2/22/2025Get Stock AlertsIndustry, Sector and Symbol Stock ExchangeNASDAQ SectorMedical Industry Pharmaceutical Preparations Sub-IndustryN/A Current SymbolNASDAQ:PTI CUSIPN/A CIK1445283 Webwww.proteostasis.com Phone617-225-0096FaxN/AEmployees44Year FoundedN/AProfitability EPS (Most Recent Fiscal Year)($1.16) Trailing P/E RatioN/A Forward P/E RatioN/A P/E GrowthN/ANet Income$-59,130,000.00 Net MarginsN/A Pretax MarginN/A Return on Equity-75.39% Return on Assets-55.04% Debt Debt-to-Equity RatioN/A Current Ratio6.69 Quick Ratio6.69 Sales & Book Value Annual Sales$5 million Price / Sales0.00 Cash FlowN/A Price / Cash FlowN/A Book Value$1.22 per share Price / BookN/AMiscellaneous Outstanding Shares52,185,000Free FloatN/AMarket Cap$37.57 million OptionableNot Optionable Beta1.16 5G Stocks: The Path Forward is ProfitableEnter your email address and we'll send you MarketBeat's guide to investing in 5G and which 5G stocks show the most promise. Get This Free Report This page (NASDAQ:PTI) was last updated on 2/22/2025 by MarketBeat.com Staff From Our PartnersElon’s “New Gold”MIT scientists just developed a brand-new metal… A metal that’s shaping up to be, not only the biggest brea...True Market Insiders | SponsoredCollect $7k per month from Tesla’s SECRET dividendTesla doesn't pay a traditional dividend.... But I just discovered a secret backdoor to collect a secret 69...Investors Alley | SponsoredElon Social Security shock?“A Maniacal Sense of Urgency” We could be just days away from Elon Musk launching his next big venture. One...Altimetry | SponsoredMajor AI announcement for 2025BIG NEWS: “Market Wizard” Larry Benedict Releases a Whole New Way to Trade AI StocksBrownstone Research | SponsoredCritical ‘Buy Now’ Alert on My Favorite Stock!My absolute favorite stock just hit a critical "buy now" trigger price.Behind the Markets | SponsoredA strange twist 500 miles from WashingtonEnergy is life. And this year, it could also make national heroes out of President Trump and VP Vance. ...Porter & Company | SponsoredThree new patents reveal Elon and Trump’s secret “Project America”Right now for a limited time… You can get Tim Bohen’s top 5 Trump stocks for 2025… For only ONE DOLLAR!...Timothy Sykes | SponsoredNvidia > DeepSeekEveryone's getting it all wrong … Sure, DeepSeek's reveal caused AI stocks to tumble … But, in the long ...Weiss Ratings | Sponsored Adding Choose a watchlist: Watchlist Adding You have already added five stocks to your watchlist. Upgrade to MarketBeat All Access to add more stocks to your watchlist. Adding Proteostasis Therapeutics, Inc. Please log in to your account or sign up in order to add this asset to your watchlist. Share Proteostasis Therapeutics With A Colleague Link copied to clipboard. Get 30 Days of MarketBeat All Access for Free Sign up for MarketBeat All Access to gain access to MarketBeat's full suite of research tools. Start Your 30-Day Trial MarketBeat All Access Features Best-in-Class Portfolio Monitoring Get personalized stock ideas. Compare portfolio to indices. Check stock news, ratings, SEC filings, and more. Stock Ideas and Recommendations See daily stock ideas from top analysts. Receive short-term trading ideas from MarketBeat. Identify trending stocks on social media. Advanced Stock Screeners and Research Tools Use our seven stock screeners to find suitable stocks. Stay informed with MarketBeat's real-time news. Export data to Excel for personal analysis. Sign in to your free account to enjoy these benefits In-depth profiles and analysis for 20,000 public companies. Real-time analyst ratings, insider transactions, earnings data, and more. Our daily ratings and market update email newsletter. Sign in to your free account to enjoy all that MarketBeat has to offer. Sign In Create Account Your Email Address: Email Address Required Your Password: Password Required Log In or Sign in with Facebook Sign in with Google Forgot your password? Your Email Address: Please enter your email address. Please enter a valid email address Choose a Password: Please enter your password. Your password must be at least 8 characters long and contain at least 1 number, 1 letter, and 1 special character. Create My Account (Free) or Sign in with Facebook Sign in with Google By creating a free account, you agree to our terms of service. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.