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Stocks to Compare Sections All Sections Selected Performance Chart Price & Volume MarketRank Analyst Ratings Sales & Book Value Profitability & Earnings Dividends Debt Ownership Miscellaneous Headlines About Compare NASDAQ:GERNNASDAQ:MACKNASDAQ:RGLSNASDAQ:ZBIO On This Page Performance ChartPrice & VolumeMarketRank™Analyst RatingsSales & Book ValueProfitability & EarningsDividendsDebtOwnershipMiscellaneousHeadlinesAbout Comparison Ideas Stock Ideas Comparative Price Performance Over Time1 day7 days30 days90 days365 daysCompare Price & VolumeCompanyCurrent Price50-Day Moving Average52-Week RangeMarket CapBetaAvg. VolumeToday's VolumeGERNGeron$1.45-2.0%$1.41$1.17▼$5.34$923.53M0.7611.78 million shs11.88 million shsMACKMerrimack Pharmaceuticals$15.13$14.82$11.53▼$15.89$223.77M1.45396,929 shsN/ARGLSRegulus Therapeutics$7.89-0.3%$4.06$0.83▼$8.20$546.26M0.49902,748 shs1.81 million shsZBIOZenas Biopharma$11.43-0.2%$9.17$5.83▼$26.25$478.16MN/A182,531 shs101,562 shsBeginner's Guide To Retirement StocksEnter your email address and we'll send you MarketBeat's list of seven best retirement stocks and why they should be in your portfolio. Get This Free ReportCompare Price PerformanceCompany1-Day Performance7-Day Performance30-Day Performance90-Day Performance1-Year PerformanceGERNGeron0.00%+14.17%+2.11%-43.69%-60.38%MACKMerrimack Pharmaceuticals0.00%0.00%0.00%0.00%0.00%RGLSRegulus Therapeutics0.00%+0.25%+181.79%+502.29%+310.94%ZBIOZenas Biopharma0.00%+9.17%+14.53%+1,142,999,900.00%+1,142,999,900.00%Compare MarketRank™CompanyOverall ScoreAnalyst's OpinionShort Interest ScoreDividend StrengthESG ScoreNews and Social Media SentimentCompany OwnershipEarnings & ValuationGERNGeron4.1271 of 5 stars4.41.00.01.33.63.30.6MACKMerrimack PharmaceuticalsN/AN/AN/AN/AN/AN/AN/AN/ARGLSRegulus Therapeutics1.2842 of 5 stars2.13.00.00.03.31.70.0ZBIOZenas BiopharmaN/AN/AN/AN/AN/AN/AN/AN/ACompare Analyst ForecastsCompanyConsensus Rating ScoreConsensus RatingConsensus Price Target% Upside from Current PriceGERNGeron 2.78Moderate Buy$5.06249.14% UpsideMACKMerrimack Pharmaceuticals 0.00N/AN/AN/ARGLSRegulus Therapeutics 2.29Hold$8.507.73% UpsideZBIOZenas Biopharma 3.00Buy$36.67220.79% UpsideCurrent Analyst Ratings BreakdownLatest MACK, GERN, RGLS, and ZBIO Analyst RatingsDateCompanyBrokerageActionRatingPrice TargetDetails5/16/2025ZBIOZenas BiopharmaHC WainwrightSubscribe to MarketBeat All Access for the recommendation accuracy ratingReiterated RatingBuy ➝ Buy$30.00 ➝ $30.005/15/2025ZBIOZenas BiopharmaWedbushSubscribe to MarketBeat All Access for the recommendation accuracy ratingReiterated RatingOutperform$35.005/8/2025GERNGeronScotiabankSubscribe to MarketBeat All Access for the recommendation accuracy ratingDowngradeSector Outperform ➝ Sector Perform$4.00 ➝ $1.505/1/2025RGLSRegulus TherapeuticsWells Fargo & CompanySubscribe to MarketBeat All Access for the recommendation accuracy ratingReiterated RatingOverweight ➝ Equal Weight$9.004/30/2025RGLSRegulus TherapeuticsWells Fargo & CompanySubscribe to MarketBeat All Access for the recommendation accuracy ratingDowngradeStrong-Buy ➝ Hold4/30/2025RGLSRegulus TherapeuticsLeerink PartnrsSubscribe to MarketBeat All Access for the recommendation accuracy ratingDowngradeStrong-Buy ➝ Hold4/30/2025RGLSRegulus TherapeuticsLeerink PartnersSubscribe to MarketBeat All Access for the recommendation accuracy ratingReiterated RatingOutperform ➝ Market Perform$7.004/30/2025RGLSRegulus TherapeuticsCanaccord Genuity GroupSubscribe to MarketBeat All Access for the recommendation accuracy ratingReiterated RatingBuy ➝ Hold$28.00 ➝ $11.004/30/2025RGLSRegulus TherapeuticsJones TradingSubscribe to MarketBeat All Access for the recommendation accuracy ratingReiterated RatingBuy ➝ Hold$8.00 ➝ $7.003/27/2025RGLSRegulus TherapeuticsWells Fargo & CompanySubscribe to MarketBeat All Access for the recommendation accuracy ratingUpgradeEqual Weight ➝ Overweight$3.00 ➝ $6.003/20/2025ZBIOZenas BiopharmaWedbushSubscribe to MarketBeat All Access for the recommendation accuracy ratingInitiated CoverageOutperform$35.00(Data available from 5/25/2022 forward. View 10+ years of historical ratings with our analyst ratings screener.)Compare Sales & Book ValueCompanyAnnual RevenuePrice/SalesCashflowPrice/CashBook ValuePrice/BookGERNGeron$116.29M7.94N/AN/A$0.46 per share3.15MACKMerrimack PharmaceuticalsN/AN/AN/AN/A$1.31 per shareN/ARGLSRegulus TherapeuticsN/AN/AN/AN/A$1.05 per shareN/AZBIOZenas Biopharma$15M31.88N/AN/AN/A∞Compare Profitability & EarningsCompanyNet IncomeEPSTrailing P/E RatioForward P/E RatioP/E GrowthNet MarginsReturn on Equity (ROE)Return on Assets (ROA)Next Earnings DateGERNGeron-$184.13M-$0.21N/AN/AN/A-682.48%-67.53%-45.46%N/AMACKMerrimack Pharmaceuticals-$1.18M$13.871.09∞N/AN/A-1.93%-1.78%N/ARGLSRegulus Therapeutics-$30.04M-$0.73N/AN/AN/AN/A-53.07%-48.58%N/AZBIOZenas BiopharmaN/A-$3.55N/A∞N/AN/AN/AN/AN/ALatest MACK, GERN, RGLS, and ZBIO EarningsDateQuarterCompanyConsensus EstimateReported EPSBeat/MissGap EPSRevenue EstimateActual RevenueDetails5/15/2025Q1 2025ZBIOZenas Biopharma-$1.15-$0.80+$0.35-$0.80$5.00 million$10.00 million5/8/2025Q1 2025RGLSRegulus Therapeutics-$0.29-$0.15+$0.14-$0.15N/AN/A5/7/2025Q1 2025GERNGeron-$0.04-$0.03+$0.01-$0.03$49.88 million$39.60 million3/20/2025Q4 2024RGLSRegulus Therapeutics-$0.20-$0.20N/A-$0.20N/AN/A2/26/2025Q4 2024GERNGeron-$0.04-$0.04N/A-$0.04$45.29 million$47.54 millionCompare DividendsCompanyAnnual PayoutDividend Yield3-Year Dividend GrowthPayout RatioYears of Consecutive GrowthGERNGeronN/AN/AN/AN/AN/AMACKMerrimack PharmaceuticalsN/AN/AN/AN/AN/ARGLSRegulus TherapeuticsN/AN/AN/AN/AN/AZBIOZenas Biopharma$0.050.42%N/AN/A N/ACompare DebtCompanyDebt-to-Equity RatioCurrent RatioQuick RatioGERNGeron0.042.892.74MACKMerrimack PharmaceuticalsN/A10.7810.78RGLSRegulus TherapeuticsN/A14.1514.14ZBIOZenas BiopharmaN/AN/AN/ACompare OwnershipInstitutional OwnershipCompanyInstitutional OwnershipGERNGeron73.71%MACKMerrimack Pharmaceuticals63.97%RGLSRegulus Therapeutics92.38%ZBIOZenas BiopharmaN/AInsider OwnershipCompanyInsider OwnershipGERNGeron7.42%MACKMerrimack Pharmaceuticals30.57%RGLSRegulus Therapeutics4.35%ZBIOZenas BiopharmaN/ACompare Miscellaneous StatsCompanyEmployeesShares OutstandingFree FloatOptionableGERNGeron70636.92 million585.76 millionOptionableMACKMerrimack Pharmaceuticals42614.79 million10.27 millionOptionableRGLSRegulus Therapeutics3069.23 million62.65 millionOptionableZBIOZenas BiopharmaN/A41.83 millionN/AN/AMACK, GERN, RGLS, and ZBIO HeadlinesRecent News About These CompaniesLost Money on Zenas BioPharma, Inc. (ZBIO)? Contact Levi & Korsinsky to Join Class Action Before June 16, 2025May 24 at 6:01 PM | accessnewswire.comZBIO Investors Have the Opportunity to Lead the Zenas BioPharma Securities Fraud Lawsuit with ...May 24 at 5:40 PM | bakersfield.comZBIO INVESTOR DEADLINE: Robbins Geller Rudman & Dowd LLP Announces that Zenas BioPharma, Inc. Investors with Substantial Losses Have Opportunity to Lead Investor Class Action ...May 24 at 5:40 PM | morningstar.comROSEN, SKILLED INVESTOR COUNSEL, Encourages Zenas BioPharma, Inc. Investors to Secure Counsel Before Important Deadline in Securities Class Action First Filed by the Firm - ZBIOMay 24 at 12:00 PM | accessnewswire.comSecurities Fraud Class Action Filed Against Zenas BioPharma, Inc. (ZBIO) - Levi & Korsinsky Reminds Investors of June 16, 2025May 23 at 4:45 PM | accessnewswire.comJune 16, 2025 Deadline Approaching: Join Class Action Against Zenas BioPharma, Inc. (ZBIO) - Contact Levi & KorsinskyMay 23 at 1:00 PM | accessnewswire.comROSEN, SKILLED INVESTOR COUNSEL, Encourages Zenas BioPharma, Inc. Investors to Secure Counsel Before Important Deadline in Securities Class Action First Filed by the Firm - ZBIOMay 23 at 12:45 PM | accessnewswire.comROSEN, THE FIRST FILING FIRM, Encourages Zenas BioPharma, Inc. Investors to Secure Counsel Before Important Deadline in Securities Class Action First Filed by the Firm – ZBIOMay 23 at 12:34 PM | globenewswire.comClass Action Lawsuit Filed Against Zenas BioPharma, Inc. (ZBIO) - Recover Losses - Contact Levi & Korsinsky Before June 16, 2025May 23 at 10:00 AM | accessnewswire.comZBIO Investors Have Opportunity to Lead Zenas BioPharma, Inc. Securities Fraud Lawsuit with the Schall Law FirmMay 23 at 9:39 AM | prnewswire.comZBIO Investors Have the Opportunity to Lead the Zenas BioPharma Securities Fraud Lawsuit with Faruqi & Faruqi, LLPMay 23 at 9:39 AM | globenewswire.comLost Money on Zenas BioPharma, Inc. (ZBIO)? Contact Levi & Korsinsky to Join Class Action Before June 16, 2025May 23 at 7:15 AM | accessnewswire.comZBIO SHAREHOLDER ALERT: Bronstein, Gewirtz and Grossman, LLC Announces that Zenas BioPharma, Inc. Stockholders with Substantial Losses Have Opportunity to Lead Class Action Lawsuit!May 23 at 7:00 AM | accessnewswire.comLevi & Korsinsky Reminds Shareholders of a Lead Plaintiff Deadline of June 16, 2025 in Zenas BioPharma, Inc. Lawsuit - ZBIOMay 23 at 5:45 AM | prnewswire.comContact Levi & Korsinsky by June 16, 2025 to Join Class Action Against Zenas BioPharma, Inc. (ZBIO)May 22 at 7:30 PM | accessnewswire.comLost Money on Zenas BioPharma, Inc. (ZBIO)? Urged to Join Class Action Before June 16, 2025 - Contact Levi & KorsinskyMay 22 at 7:00 PM | accessnewswire.comZBIO DEADLINE NOTICE: ROSEN, GLOBAL INVESTOR COUNSEL, Encourages Zenas BioPharma, Inc. Investors with Losses in Excess of $100K to Secure Counsel Before Important Deadline in Securities Class Action First Filed by the Firm - ZBIOMay 22 at 6:39 PM | accessnewswire.comJoin Class Action to Recover Losses from Zenas BioPharma, Inc. (ZBIO) - Contact Levi & Korsinsky Before June 16, 2025May 22 at 4:30 PM | accessnewswire.comZBIO INVESTOR DEADLINE: Robbins Geller Rudman & Dowd LLP Announces that Zenas BioPharma, Inc. Investors with Substantial Losses Have Opportunity to Lead Investor Class Action LawsuitMay 22 at 4:16 PM | globenewswire.comShareholders of Zenas BioPharma, Inc. Should Contact Levi & Korsinsky Before June 16, 2025 to Discuss Your Rights – ZBIOMay 22 at 1:48 PM | globenewswire.comWhat is Wedbush's Estimate for Zenas Biopharma Q2 Earnings?May 20, 2025 | marketbeat.comNew MarketBeat Followers Over TimeMedia Sentiment Over TimeMACK, GERN, RGLS, and ZBIO Company DescriptionsGeron NASDAQ:GERN$1.45 -0.03 (-2.03%) Closing price 05/23/2025 04:00 PM EasternExtended Trading$1.44 -0.01 (-0.62%) As of 05/23/2025 07:29 PM 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 Polygon.io. Learn more.Geron Corporation, a late-stage clinical biopharmaceutical company, focuses on the development and commercialization of therapeutics for myeloid hematologic malignancies. It develops imetelstat, a telomerase inhibitor that is in Phase 3 clinical trials, which inhibits the uncontrolled proliferation of malignant stem and progenitor cells in myeloid hematologic malignancies for the treatment of low or intermediate-1 risk myelodysplastic syndromes and intermediate-2 or high-risk myelofibrosis. The company was incorporated in 1990 and is headquartered in Foster City, California.Merrimack Pharmaceuticals NASDAQ:MACKMerrimack Pharmaceuticals, Inc. operates as a biopharmaceutical company in the United States. The company was incorporated in 1993 and is headquartered in Cambridge, Massachusetts.Regulus Therapeutics NASDAQ:RGLS$7.89 -0.02 (-0.25%) Closing price 05/23/2025 04:00 PM EasternExtended Trading$7.90 +0.00 (+0.06%) As of 05/23/2025 07:17 PM 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 Polygon.io. Learn more.Regulus Therapeutics Inc., a clinical-stage biopharmaceutical company, focuses on discovery and development of drugs that targets microRNAs to treat a range of diseases in the United States. Its product candidates include RGLS8429, an anti-miR next generation oligonucleotide targeting miR-17, which is in Phase 1b clinical trial for the treatment of autosomal dominant polycystic kidney disease. The company is also developing a pipeline of preclinical drug products for target organ-selective delivery strategies. Regulus Therapeutics Inc. was incorporated in 2007 and is headquartered in San Diego, California.Zenas Biopharma NASDAQ:ZBIO$11.43 -0.02 (-0.17%) As of 05/23/2025 04:00 PM EasternZenas BioPharma, Inc. is a clinical-stage global biopharmaceutical company, which engages in the development and commercialization of transformative immunology-based therapies for patients. The company was founded by Lonnie O. Moulder Jr on November 12, 2019 and is headquartered in Waltham, MA. 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