NASDAQ:STRO Sutro Biopharma (STRO) Stock Price, News & Analysis $38.42 -1.18 (-2.98%) Closing price 05/14/2026 04:00 PM EasternExtended Trading$38.42 +0.00 (+0.00%) As of 04:05 AM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more. Add Compare Share Share Stock Analysis Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock About Sutro Biopharma Stock (NASDAQ:STRO) View Price History Chart DataSkip Price History Chart 1 Day 5 Days 30 Days 90 Days 1 Year Advanced 1 Day 1 Day 5 Days 30 Days 90 Days 1 Year Advanced Show volume Show extended hours Get Sutro Biopharma alerts:Sign Up Key Stats Today's Range$38.10▼$40.3150-Day Range$20.68▼$40.9152-Week Range$6.74▼$41.88Volume117,451 shsAverage Volume240,384 shsMarket Capitalization$636.62 millionP/E RatioN/ADividend YieldN/APrice Target$40.78Consensus RatingModerate Buy Company Overview Sutro Biopharma, Inc. is a clinical-stage biopharmaceutical company focused on the discovery and development of novel biologic drug candidates in the fields of oncology and immunology. The company leverages a proprietary cell-free protein synthesis platform, XpressCF™, to design and produce complex, multi-specific proteins that include antibody-drug conjugates, bispecific antibodies, and cytokine fusion proteins. This platform enables rapid generation and optimization of protein therapeutics that may not be feasible with traditional cell-based expression systems. Founded in 2003 and headquartered in South San Francisco, California, Sutro Biopharma has built a pipeline of immuno-oncology candidates in various stages of preclinical and clinical development. The company’s lead programs target solid tumors and hematologic malignancies, with several assets designed to engage the immune system through both targeted delivery of cytotoxic payloads and enhancement of T-cell activity. In addition to advancing its own pipeline, Sutro has forged research and development collaborations with global pharmaceutical partners to apply its XpressCF™ platform across a range of therapeutic areas. With operations anchored in the San Francisco Bay Area, Sutro Biopharma serves both domestic and international partners through collaborative agreements and licensing arrangements. The company’s scientific leadership brings together expertise in protein engineering, antibody biology, and translational medicine, positioning Sutro to address challenging molecular targets and streamline the path from discovery to clinical testing. As a publicly traded entity on the NASDAQ under the symbol STRO, Sutro continues to pursue innovative biologic therapies aimed at improving outcomes for patients with cancer and other immune-related diseases.AI Generated. May Contain Errors. Read More Sutro Biopharma Stock Analysis - MarketRank™See Top-Rated MarketRank™ Stocks36th Percentile Overall ScoreSTRO MarketRank™: Sutro Biopharma scored higher than 36% of companies evaluated by MarketBeat, and ranked 733rd out of 866 stocks in the medical sector. Scores are calculated by averaging available category scores, with extra weight given to analysis and valuation. Analyst's Opinion2.9 / 5Analyst RatingModerate Buy Consensus RatingSutro Biopharma has received a consensus rating of Moderate Buy. The company's average rating score is 2.85, and is based on 3 strong buy ratings, 7 buy ratings, 1 hold rating, and 2 sell ratings.Upside/DownsideThe consensus price target for Sutro Biopharma is close to its current price, suggesting limited near-term upside or downside.Amount of Analyst CoverageSutro Biopharma has been the subject of 10 research reports in the past 90 days, demonstrating strong analyst interest in this stock.Read more about Sutro Biopharma's stock forecast and price target. Earnings and Valuation0.6 / 5Proj. Earnings GrowthGrowing Earnings GrowthEarnings for Sutro Biopharma are expected to grow in the coming year, from ($9.04) to ($7.92) per share.Price to Earnings Ratio vs. the MarketThe P/E ratio of Sutro Biopharma is -1.47, which means that its earnings are negative and its P/E ratio cannot be compared to companies with positive earnings.Price to Earnings Ratio vs. SectorThe P/E ratio of Sutro Biopharma is -1.47, which means that its earnings are negative and its P/E ratio cannot be compared to companies with positive earnings. Short Interest2.0 / 5Short Interest LevelBearish Percentage of Shares Shorted6.27% of the float of Sutro Biopharma has been sold short.Short Interest Ratio / Days to CoverSutro Biopharma has a short interest ratio ("days to cover") of 3.91, which is generally considered an acceptable ratio of short interest to trading volume.Change versus previous monthShort interest in Sutro Biopharma has recently increased by 30.51%, indicating that investor sentiment is decreasing significantly. Dividend0.0 / 5Dividend StrengthN/A Dividend YieldSutro Biopharma does not currently pay a dividend.Dividend GrowthSutro Biopharma does not have a long track record of dividend growth. News and Social Media2.2 / 5News Sentiment0.58 News SentimentSutro Biopharma has a news sentiment score of 0.58. This score is calculated as an average of sentiment of articles about the company over the last seven days and ranges from 2 (good news) to -2 (bad news). This news sentiment score is similar to the average news sentiment of Medical companies.News Coverage This WeekMarketBeat has tracked 3 news articles for Sutro Biopharma this week, compared to 3 articles on an average week.Search Interest3 people have searched for STRO on MarketBeat in the last 30 days. Company Ownership0.8 / 5Insider TradingN/A Insider Buying vs. Insider SellingIn the past three months, Sutro Biopharma insiders have not sold or bought any company stock.Percentage Held by Insiders3.60% of the stock of Sutro Biopharma is held by insiders.Percentage Held by Institutions96.99% of the stock of Sutro Biopharma is held by institutions. High institutional ownership can be a signal of strong market trust in this company.Read more about Sutro Biopharma's insider trading history. Receive STRO Stock News and Ratings via Email Sign-up to receive the latest news and ratings for Sutro Biopharma and its competitors with MarketBeat's FREE daily newsletter. 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STRO Stock News HeadlinesSutro Biopharma Reports First Quarter 2026 Financial Results and Business HighlightsMay 14 at 4:05 PM | globenewswire.comSutro Biopharma, Inc. (NASDAQ:STRO) Receives Consensus Rating of "Moderate Buy" from BrokeragesMay 7, 2026 | americanbankingnews.comThe REAL Reason Trump is Invading IranFor a moment… Forget about Trump’s ties to Israel. Forget about reports of Iran’s nuclear program. Because my research has led me to believe we’re risking World War 3 with Iran for a completely different reason.May 15 at 1:00 AM | Banyan Hill Publishing (Ad)Sutro Biopharma (STRO) Expected to Announce Earnings on ThursdayMay 7, 2026 | americanbankingnews.comCitizens Lifts PT on Sutro Biopharma (STRO) on Its Pipeline and Lead ProgramMay 1, 2026 | insidermonkey.comMizuho initiates coverage of Sutro Biopharma (STRO) with outperform recommendationMay 1, 2026 | msn.comSutro Biopharma: Recycling Past Data Ahead Of The Readout, SellMay 1, 2026 | seekingalpha.comHere is Why Sutro Biopharma (STRO) is One of the Tiny Stocks That Are On Fire Right NowApril 29, 2026 | finance.yahoo.comSee More Headlines STRO Stock Analysis - Frequently Asked Questions How have STRO shares performed this year? Sutro Biopharma's stock was trading at $11.57 on January 1st, 2026. Since then, STRO stock has increased by 232.1% and is now trading at $38.42. How were Sutro Biopharma's earnings last quarter? Sutro Biopharma, Inc. (NASDAQ:STRO) issued its quarterly earnings results on Thursday, May, 14th. The company reported ($2.94) EPS for the quarter, missing analysts' consensus estimates of ($2.74) by $0.20. The business earned $14.52 million during the quarter, compared to the consensus estimate of $8.89 million. When did Sutro Biopharma's stock split? Shares of Sutro Biopharma reverse split before market open on Wednesday, December 3rd 2025.A 1-10 reverse split was announced. The number of shares owned by shareholders was adjusted after the closing bell on Tuesday, December 2nd 2025. An investor that had 100 shares of stock prior to the reverse split would have 10 shares after the split. When did Sutro Biopharma IPO? Sutro Biopharma (STRO) raised $85 million in an initial public offering (IPO) on Thursday, September 27th 2018. The company issued 5,667,000 shares at $14.00-$16.00 per share. Cowen and Piper Jaffray acted as the underwriters for the IPO and JMP Securities and Wedbush PacGrow were co-managers. Who are Sutro Biopharma's major shareholders? Sutro Biopharma's top institutional shareholders include Renaissance Technologies LLC (0.59%) and Sigma Planning Corp (0.08%). Insiders that own company stock include Jane Chung, Hans-Peter Gerber, David Pauling, Connie Matsui, Gregory K Chow, Nicki Vasquez and Brunilda Shtylla. View institutional ownership trends. How do I buy shares of Sutro Biopharma? Shares of STRO 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 Sutro Biopharma own? Based on aggregate information from My MarketBeat watchlists, some other companies that Sutro Biopharma investors own include NVIDIA (NVDA), Tesla (TSLA), Advanced Micro Devices (AMD), JPMorgan Chase & Co. (JPM), Meta Platforms (META), Moderna (MRNA) and Home Depot (HD). Company Calendar Today5/14/2026Last Earnings5/14/2026Next Earnings (Estimated)5/14/2026Corporate presentation5/14/2026Fiscal Year End12/31/2026Get Stock Alerts Health Indicator TradeSmith's Health IndicatorA long-term volatility-based measure designed for securities held 12 months or longer.Green: Strong and healthy uptrend with normal pullbacks.Yellow: Significant pullback but still within expected volatility.Red: Dropped beyond expected volatility; considered unhealthy. Green Zone (5m+) 1-Year History May 25 Aug 25 Nov 25 Feb 26 May 26 STRO's financial health is in the Green zone, according to TradeSmith. STRO has been in this zone for over 5 months. Industry, Sector and Symbol Stock ExchangeNASDAQ SectorMedical Industry MED - BIOMED/GENE Sub-IndustryPharmaceutical Products Current SymbolNASDAQ:STRO CIK1382101 Webwww.sutrobio.com Phone(650) 392-8412FaxN/AEmployees240Year Founded2003Price Target and Rating Average Price Target for Sutro Biopharma$40.78 High Price Target$100.00 Low Price Target$8.00 Potential Upside/Downside+6.1%Consensus RatingModerate Buy Rating Score (0-4)2.85 Research Coverage13 Analysts Profitability EPS (Trailing Twelve Months)($26.10) Trailing P/E RatioN/A Forward P/E RatioN/A P/E GrowthN/ANet Income-$191.09 million Net Margins-186.45% Pretax Margin-186.54% Return on EquityN/A Return on Assets-79.02% Debt Debt-to-Equity RatioN/A Current Ratio2.01 Quick Ratio2.01 Sales & Book Value Annual Sales$102.48 million Price / Sales6.21 Cash FlowN/A Price / Cash FlowN/A Book Value($15.43) per share Price / Book-2.49Miscellaneous Outstanding Shares16,570,000Free Float15,972,000Market Cap$636.62 million OptionableOptionable Beta1.63 Social Links The 10 Best AI Stocks to Own in 2026Wondering where to start (or end) with AI stocks? These 10 simple stocks can help investors build long-term wealth as artificial intelligence continues to grow into the future.Get This Free Report This page (NASDAQ:STRO) was last updated on 5/15/2026 by MarketBeat.com Staff. 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