OTCMKTS:PRTX Protalex (PRTX) Stock Price, News & Analysis $0.01 0.00 (0.00%) As of 06/25/2021 Add Compare Share Share Stock Analysis Stock AnalysisBuy This Stock About Protalex Stock (OTCMKTS:PRTX) Get Protalex alerts:Sign Up Key Stats Today's Range$0.0130▼$0.013050-Day Range$0.0130▼$0.013052-Week Range$0.00▼$0.10VolumeN/AAverage VolumeN/AMarket CapitalizationN/AP/E RatioN/ADividend YieldN/APrice TargetN/AConsensus RatingN/A Company Overview Protalex, Inc. (OTCMKTS: PRTX) is a development‐stage biotechnology company headquartered in Cambridge, Massachusetts. The company was founded in 2006 with a focus on harnessing the body’s immune system to target and eliminate cancer cells. Protalex leverages proprietary antibody engineering and fusion protein technologies to create multi‐functional immunotherapies designed to stimulate antitumor T‐cell responses. At the core of Protalex’s pipeline are novel fusion proteins and bispecific antibody constructs that bridge tumor antigens with costimulatory immune receptors. These candidates are engineered to engage key pathways in the tumor microenvironment, including CD28 and other costimulatory molecules, with the goal of enhancing T‐cell activation while minimizing off‐target effects. The company’s research efforts span both solid tumors and hematologic malignancies, with several preclinical programs advancing toward IND‐enabling studies. Protalex collaborates with academic institutions and research organizations to validate its platform and identify new therapeutic targets. Its management team brings together expertise in protein engineering, oncology drug development and regulatory strategy. While operating primarily in North America, the company seeks to establish broader partnerships to support global clinical development and, ultimately, commercialization of its immuno‐oncology candidates.AI Generated. May Contain Errors. Read More Receive PRTX Stock News and Ratings via Email Sign-up to receive the latest news and ratings for Protalex and its competitors with MarketBeat's FREE daily newsletter. Submit View SMS TermsBy entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. Text HELP for help/customer support. Unsubscribe at any time by replying "STOP" to any text message that you receive from MarketBeat or by visiting our mailing preferences page. Read our full terms of service and privacy policy. PRTX Stock News HeadlinesAberystwyth to Tregaron, CeredigionMarch 23, 2024 | thetimes.co.ukTSee More Headlines PRTX Stock Analysis - Frequently Asked Questions How have PRTX shares performed this year? Protalex's stock was trading at $0.0130 on January 1st, 2025. Since then, PRTX shares have increased by 0.0% and is now trading at $0.0130. How were Protalex's earnings last quarter? Protalex Inc. (OTCMKTS:PRTX) announced its quarterly earnings data on Friday, April, 13th. The company reported ($0.06) earnings per share for the quarter. How do I buy shares of Protalex? Shares of PRTX stock can be purchased through any online brokerage account. Popular online brokerages with access to the U.S. stock market include Charles Schwab, E*TRADE, Fidelity, and Vanguard Brokerage Services. What other stocks do shareholders of Protalex own? Based on aggregate information from My MarketBeat watchlists, some other companies that Protalex investors own include Boeing (BA), Caterpillar (CAT), Enterprise Products Partners (EPD), Eros STX Global (EROS), Global Payments (GPN), Intuitive Surgical (ISRG) and AT&T (T). Company Calendar Last Earnings4/13/2018Today10/16/2025Fiscal Year End5/31/2026Get Stock AlertsIndustry, Sector and Symbol Stock ExchangeOTCMKTS SectorMedical Industry MED - DRUGS Sub-IndustryBusiness Services Current SymbolOTCMKTS:PRTX Previous SymbolNASDAQ:PRTX CIK1099215 Webwww.protalex.com Phone215-862-9720Fax215-862-6614Employees2Year FoundedN/AProfitability EPS (Trailing Twelve Months)N/A Trailing P/E RatioN/A Forward P/E RatioN/A P/E GrowthN/ANet IncomeN/A Net MarginsN/A Pretax MarginN/A Return on EquityN/A Return on AssetsN/A Debt Debt-to-Equity RatioN/A Current RatioN/A Quick RatioN/A Sales & Book Value Annual SalesN/A Price / SalesN/A Cash FlowN/A Price / Cash FlowN/A Book ValueN/A Price / BookN/AMiscellaneous Outstanding SharesN/AFree FloatN/AMarket CapN/A OptionableNot Optionable BetaN/A 7 Stocks That Could Be Bigger Than Tesla, Nvidia, and GoogleLooking for the next FAANG stock before everyone has heard about it? Enter your email address to see which stocks MarketBeat analysts think might become the next trillion dollar tech company.Get This Free Report This page (OTCMKTS:PRTX) was last updated on 10/16/2025 by MarketBeat.com Staff From Our PartnersOctober 16 Changes the Microchip Game — and InvestingWhile everyone's chasing the same AI plays, George Gilder is focused on something completely different. He ...Banyan Hill Publishing | SponsoredBuilding The Infrastructure for the Coming Financial ResetWhile China pushes nearly $1 trillion through its new digital currency, one emerging company is quietly buildi...Intellistake | SponsoredClaim Your Share of $5.39 BILLION in AI Equity ChecksThe U.S. government just took advantage of Public Law 81-774 to crack down on AI companies... In turn, enfo...Angel Publishing | SponsoredOut of 18,347 Cryptocurrencies... 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