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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:ACOGNASDAQ:ALTSNASDAQ:SLNNASDAQ:SPRO 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 VolumeACOGAlpha Cognition$8.82-3.5%$5.98$3.75▼$11.40$141.30M2.4897,658 shs127,567 shsALTSJanone$8.96+0.6%$5.49$1.29▼$9.84$156.40M2.14225,712 shs458,522 shsSLNSilence Therapeutics$5.00-1.2%$3.49$1.97▼$22.47$149.65M1.2300,986 shs139,376 shsSPROSpero Therapeutics$0.68-2.1%$0.68$0.51▼$1.53$38.13M0.23181,754 shs68,596 shsElon Musk's Next MoveExplore Elon Musk’s boldest ventures yet—from AI and autonomy to space colonization—and find out how investors can ride the next wave of innovation.Get This Free ReportCompare Price PerformanceCompany1-Day Performance7-Day Performance30-Day Performance90-Day Performance1-Year PerformanceACOGAlpha Cognition-3.50%-16.56%+75.00%+44.59%+881,999,900.00%ALTSJanone+0.56%+31.96%+41.77%+44.05%+895,999,900.00%SLNSilence Therapeutics-1.19%-2.72%+48.81%+4.82%-77.18%SPROSpero Therapeutics-2.05%+0.26%-5.96%-14.15%-53.61%Compare MarketRank™CompanyOverall ScoreAnalyst's OpinionShort Interest ScoreDividend StrengthESG ScoreNews and Social Media SentimentCompany OwnershipEarnings & ValuationACOGAlpha Cognition1.5529 of 5 stars3.50.00.00.02.70.80.0ALTSJanoneN/AN/AN/AN/AN/AN/AN/AN/ASLNSilence Therapeutics3.6918 of 5 stars4.44.00.00.03.71.70.6SPROSpero Therapeutics4.5112 of 5 stars3.34.00.04.72.70.02.5Compare Analyst ForecastsCompanyConsensus Rating ScoreConsensus RatingConsensus Price Target% Upside from Current PriceACOGAlpha Cognition 3.00Buy$20.00126.76% UpsideALTSJanone 0.00N/AN/AN/ASLNSilence Therapeutics 2.71Moderate Buy$33.83576.67% UpsideSPROSpero Therapeutics 2.50Moderate Buy$5.00633.14% UpsideCurrent Analyst Ratings BreakdownLatest SPRO, ALTS, SLN, and ACOG Analyst RatingsDateCompanyBrokerageActionRatingPrice TargetDetails5/16/2025ACOGAlpha CognitionHC WainwrightSubscribe to MarketBeat All Access for the recommendation accuracy ratingReiterated RatingBuy ➝ Buy$20.00 ➝ $20.005/9/2025SLNSilence TherapeuticsThe Goldman Sachs GroupSubscribe to MarketBeat All Access for the recommendation accuracy ratingLower Price TargetSell ➝ Sell$4.00 ➝ $3.005/9/2025SLNSilence TherapeuticsMorgan StanleySubscribe to MarketBeat All Access for the recommendation accuracy ratingLower Price TargetOverweight ➝ Overweight$45.00 ➝ $25.005/9/2025SLNSilence TherapeuticsChardan CapitalSubscribe to MarketBeat All Access for the recommendation accuracy ratingLower Price TargetBuy ➝ Buy$55.00 ➝ $35.003/31/2025ACOGAlpha CognitionHC WainwrightSubscribe to MarketBeat All Access for the recommendation accuracy ratingReiterated RatingBuy ➝ Buy$20.00 ➝ $20.003/25/2025ACOGAlpha CognitionRaymond JamesSubscribe to MarketBeat All Access for the recommendation accuracy ratingUpgradeModerate Buy3/18/2025ACOGAlpha CognitionHC WainwrightSubscribe to MarketBeat All Access for the recommendation accuracy ratingInitiated CoverageBuy$20.003/7/2025SLNSilence TherapeuticsHC WainwrightSubscribe to MarketBeat All Access for the recommendation accuracy ratingReiterated RatingBuy ➝ Buy$75.00 ➝ $75.003/5/2025SLNSilence TherapeuticsMorgan StanleySubscribe to MarketBeat All Access for the recommendation accuracy ratingLower Price TargetOverweight ➝ Overweight$49.00 ➝ $45.003/4/2025SLNSilence TherapeuticsBMO Capital MarketsSubscribe to MarketBeat All Access for the recommendation accuracy ratingLower Price TargetOutperform ➝ Outperform$67.00 ➝ $25.003/4/2025SLNSilence TherapeuticsThe Goldman Sachs GroupSubscribe to MarketBeat All Access for the recommendation accuracy ratingLower Price TargetSell ➝ Sell$6.00 ➝ $4.00(Data available from 5/28/2022 forward. View 10+ years of historical ratings with our analyst ratings screener.)Compare Sales & Book ValueCompanyAnnual RevenuePrice/SalesCashflowPrice/CashBook ValuePrice/BookACOGAlpha Cognition$2.93M48.25N/AN/A($1.08) per share-8.17ALTSJanone$18.05M8.67N/AN/A($0.67) per share-13.37SLNSilence Therapeutics$27.70M5.40N/AN/A$0.71 per share7.04SPROSpero Therapeutics$28.30M1.35$0.42 per share1.62$2.02 per share0.34Compare Profitability & EarningsCompanyNet IncomeEPSTrailing P/E RatioForward P/E RatioP/E GrowthNet MarginsReturn on Equity (ROE)Return on Assets (ROA)Next Earnings DateACOGAlpha Cognition-$13.77M-$1.20N/A∞N/AN/AN/A-344.17%8/11/2025 (Estimated)ALTSJanone-$7.81MN/A0.00∞N/AN/A-2,940.01%-39.81%N/ASLNSilence Therapeutics-$53.82M-$1.50N/AN/AN/A-342.00%-62.81%-33.89%N/ASPROSpero Therapeutics$22.81M-$1.289.74N/AN/A3.30%4.03%2.21%8/4/2025 (Estimated)Latest SPRO, ALTS, SLN, and ACOG EarningsDateQuarterCompanyConsensus EstimateReported EPSBeat/MissGap EPSRevenue EstimateActual RevenueDetails5/15/2025Q1 2025ACOGAlpha Cognition-$0.58-$0.20+$0.38-$0.13$0.50 million$2.93 million5/13/2025Q1 2025SPROSpero Therapeutics-$0.55-$0.25+$0.30-$0.25$11.00 million$5.87 million5/8/2025Q1 2025SLNSilence Therapeutics-$0.18-$0.60-$0.42-$0.60$3.58 million$0.14 million3/31/2025Q4 2024ACOGAlpha Cognition-$0.48-$0.51-$0.03-$0.51N/AN/A3/27/2025Q4 2024SPROSpero Therapeutics-$0.35-$0.38-$0.03-$0.38$12.40 million$15.04 millionCompare DividendsCompanyAnnual PayoutDividend Yield3-Year Dividend GrowthPayout RatioYears of Consecutive GrowthACOGAlpha CognitionN/AN/AN/AN/AN/AALTSJanone$1.2213.62%N/AN/AN/ASLNSilence TherapeuticsN/AN/AN/AN/AN/ASPROSpero Therapeutics$0.068.80%N/AN/A N/ACompare DebtCompanyDebt-to-Equity RatioCurrent RatioQuick RatioACOGAlpha CognitionN/A1.501.50ALTSJanone1.960.750.75SLNSilence TherapeuticsN/A9.319.31SPROSpero TherapeuticsN/A2.682.68Compare OwnershipInstitutional OwnershipCompanyInstitutional OwnershipACOGAlpha CognitionN/AALTSJanone6.27%SLNSilence Therapeutics98.73%SPROSpero Therapeutics25.60%Insider OwnershipCompanyInsider OwnershipACOGAlpha Cognition14.00%ALTSJanone4.90%SLNSilence Therapeutics2.95%SPROSpero Therapeutics4.52%Compare Miscellaneous StatsCompanyEmployeesShares OutstandingFree FloatOptionableACOGAlpha CognitionN/A16.02 million10.97 millionN/AALTSJanone17017.46 million13.38 millionN/ASLNSilence Therapeutics10029.93 millionN/ANot OptionableSPROSpero Therapeutics15055.91 million52.05 millionOptionableSPRO, ALTS, SLN, and ACOG HeadlinesRecent News About These CompaniesSpero Therapeutics (NASDAQ:SPRO) & Perrigo (NYSE:PRGO) Head to Head AnalysisMay 19, 2025 | americanbankingnews.comSpero Therapeutics, Inc. (SPRO) Reports Q1 Loss, Misses Revenue EstimatesMay 13, 2025 | zacks.comSpero Therapeutics Announces First Quarter 2025 Operating Results and Provides a Business UpdateMay 13, 2025 | globenewswire.comSpero Therapeutics to Report First Quarter 2025 Financial Results and Provide Business Update on Tuesday, May 13, 2025May 5, 2025 | globenewswire.comSpero Therapeutics, Inc.: Spero Therapeutics Appoints Esther Rajavelu as President and Chief Executive OfficerApril 29, 2025 | finanznachrichten.deSpero Therapeutics Appoints Esther Rajavelu as President and Chief Executive OfficerApril 28, 2025 | globenewswire.comSpero Therapeutics Analyst RatingsApril 7, 2025 | benzinga.comTD Cowen Sticks to Their Hold Rating for Spero Therapeutics (SPRO)April 2, 2025 | markets.businessinsider.comWe're Keeping An Eye On Spero Therapeutics' (NASDAQ:SPRO) Cash Burn RateMarch 29, 2025 | finance.yahoo.comSpero Therapeutics reports Q4 EPS (38c), consensus (31c)March 28, 2025 | markets.businessinsider.comSpero halts development on another antibiotic in latest reprioritizationMarch 28, 2025 | fiercebiotech.comSpero Therapeutics, Inc.: Spero Therapeutics Announces Fourth Quarter and Full Year 2024 Operating Results and Provides a Business UpdateMarch 28, 2025 | finanznachrichten.deSpero Therapeutics, Inc. (SPRO) Q4 2024 Earnings Call TranscriptMarch 27, 2025 | seekingalpha.comSpero Therapeutics, Inc. (SPRO) Reports Q4 Loss, Tops Revenue EstimatesMarch 27, 2025 | zacks.comSpero Therapeutics Announces Fourth Quarter and Full Year 2024 Operating Results and Provides a Business UpdateMarch 27, 2025 | globenewswire.com1SPRO : A Glimpse of Spero Therapeutics's Earnings PotentialMarch 26, 2025 | benzinga.comSpero Therapeutics to Report Fourth Quarter and Full Year 2024 Financial Results and Provide Business Update on Thursday, March 27, 2025March 18, 2025 | globenewswire.comUPDATE – Spero Therapeutics to Present at TD Cowen 45th Annual Health Care ConferenceFebruary 25, 2025 | globenewswire.comSpero Therapeutics to Present at TD Cowen 45th Annual Health Care ConferenceFebruary 25, 2025 | globenewswire.comSpero Therapeutics CEO sells shares worth $121,159February 6, 2025 | msn.comNew MarketBeat Followers Over TimeMedia Sentiment Over TimeTop HeadlinesView All HeadlinesQualcomm Is 5x Cheaper Than AMD, But Won’t Be for LongBy Sam Quirke | May 13, 2025View Qualcomm Is 5x Cheaper Than AMD, But Won’t Be for LongWhy D-Wave's Project With Davidson Is a Game-Changer For QuantumBy Nathan Reiff | April 30, 2025View Why D-Wave's Project With Davidson Is a Game-Changer For QuantumSuper Micro Computer Stock Clears New Path Higher on Saudi OrdersBy Gabriel Osorio-Mazilli | May 22, 2025View Super Micro Computer Stock Clears New Path Higher on Saudi OrdersBullish NVIDIA Market Set to Surge 50% Ahead of Q1 EarningsBy Thomas Hughes | May 27, 2025View Bullish NVIDIA Market Set to Surge 50% Ahead of Q1 EarningsSprouts Stock: Insider Sales, But Strong Bullish SignalsBy Thomas Hughes | May 19, 2025View Sprouts Stock: Insider Sales, But Strong Bullish SignalsSPRO, ALTS, SLN, and ACOG Company DescriptionsAlpha Cognition NASDAQ:ACOG$8.82 -0.32 (-3.50%) As of 05/27/2025 04:00 PM EasternAlpha Cognition, Inc. is a clinical stage biopharmaceutical company that develops treatments for underserved neurodegenerative diseases such as Alzheimer's Dementia and Amyotrophic Lateral Sclerosis. The company was founded in 2000 and is headquartered in Vancouver, Canada.Janone NASDAQ:ALTS$8.96 +0.05 (+0.56%) Closing price 05/27/2025 04:00 PM EasternExtended Trading$9.04 +0.08 (+0.89%) As of 05/27/2025 07:52 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.ALT5 Sigma Corp. is a clinical-stage biopharmaceutical company, which engages in identifying, acquiring, licensing, developing, partnering, and commercializing novel, non-opioid, and non-addictive therapies to address the large unmet medical need for the treatment of pain and addiction. It operates under the Biotechnology and Recycling segments. The Biotechnology segment focuses on finding treatments for conditions that cause severe pain and bringing to market drugs with non-addictive pain-relieving properties. The Recycling segment is involved in a turnkey appliance recycling program. The company was founded by Edward R. Cameron in 1976 and is headquartered in Las Vegas, NV.Silence Therapeutics NASDAQ:SLN$5.00 -0.06 (-1.19%) Closing price 05/27/2025 04:00 PM EasternExtended Trading$5.02 +0.02 (+0.40%) As of 05/27/2025 07:35 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.Silence Therapeutics plc, a biotechnology company, focuses on the discovery and development novel molecules incorporating short interfering ribonucleic acid (siRNA) to inhibit the expression of specific target genes in hematology, cardiovascular, and rare diseases. The company's mRNAi GalNAc Oligonucleotide Discovery platform consists of precision engineered product candidates designed to target specific disease-associated genes in the liver. The company develops Zerlasiran (SLN360), which is in phase 2 clinical trial for cardiovascular disease associated with elevated lipoprotein(a); and Divesiran (SLN124), an siRNA molecule that is in Phase I clinical trials for the treatment of genetic hematological conditions, including polycythemia vera. It is also developing SLN-COMP-1 and SLN-COMP-2 for complement-mediated diseases; and SLN-HAN-1 and SLN-HAN-2. It has collaboration agreements with AstraZeneca PLC to discover, develop, and commercialize siRNA therapeutics for the treatment of cardiovascular, renal, metabolic, and respiratory diseases; Hansoh Pharmaceutical Group Company Limited to develop siRNAs; and Mallinckrodt Pharma IP Trading DAC to develop and commercialize RNAi drug targets designed to silence the complement cascade in complement-mediated disorders. The company was formerly known as SR Pharma plc and changed its name to Silence Therapeutics plc in May 2007. Silence Therapeutics plc was incorporated in 1994 and is headquartered in London, the United Kingdom.Spero Therapeutics NASDAQ:SPRO$0.68 -0.01 (-2.05%) Closing price 05/27/2025 04:00 PM EasternExtended Trading$0.68 +0.00 (+0.44%) As of 05/27/2025 04:01 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.Spero Therapeutics, Inc., a clinical-stage biopharmaceutical company, focuses on identifying, developing, and commercializing novel treatments for multi-drug resistant (MDR) bacterial infections and rare diseases in the United States. The company's product candidates include tebipenem pivoxil hydrobromide (HBr), an oral carbapenem-class antibiotic to treat complicated urinary tract infections, including pyelonephritis for adults; SPR206, an intravenous-administered antibiotic against MDR Gram-negative pathogens comprising carbapenem-resistant enterobacterales (CRE), acinetobacter baumannii, and pseudomonas aeruginosa, as well as negative bacterial infections in the hospital setting; and SPR720, a novel oral antibiotic agent for the treatment of non-tuberculous mycobacterial pulmonary disease. It has license agreement with Meiji Seika Pharma Co., Ltd. to support the development of tebipenem HBr; Everest Medicines to develop, manufacture, and commercialize SPR206 in Greater China, South Korea, and Southeast Asian countries; and Vertex Pharmaceuticals Incorporated for patents relating to SPR720, as well as SPR719, an active metabolite. Spero Therapeutics, Inc. was founded in 2013 and is headquartered in Cambridge, Massachusetts. 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