Phathom Pharmaceuticals (PHAT) Stock Chart & Stock Price History $8.35 -0.19 (-2.22%) Closing price 08/1/2025 04:00 PM EasternExtended Trading$8.40 +0.05 (+0.59%) As of 08/1/2025 06:47 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. Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Phathom Pharmaceuticals Stock Price Performance The Phathom Pharmaceuticals (PHAT) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 27.45%, with a year-to-date return of 2.83%. In the past month, the stock has decreased 6.29%, reflecting recent market activity. As of the latest close, Phathom Pharmaceuticals traded at $8.35 with a market cap of $582.95 million and volume of 501,927 shares. Five years ago, the stock traded at $33.26, representing a 74.89% decrease over that period. At the time, it had a market cap of $963.38 million and a volume of 90,726 shares. Receive PHAT Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Phathom Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance-5.11%1 Month Performance-6.29%3 Month Performance+202.54%Year-To-Date Performance+2.83%1 Year Performance-27.45%5 Year Performance-74.89% PHAT Stock Chart for Saturday, August, 2, 2025 PHAT Chart by TradingView Phathom Pharmaceuticals Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame Start Date End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization08/01/2025$8.54$8.35-2.22%$8.50$8.18501,927 shs$582.95 million07/31/2025$8.71$8.54-1.95%$9.23$8.49669,643 shs$596.18 million07/30/2025$8.62$8.71+1.04%$9.13$8.57889,609 shs$608.05 million07/29/2025$8.80$8.62-2.05%$8.98$8.58824,597 shs$601.80 million07/28/2025$9.63$8.80-8.62%$10.02$8.801.05 million shs$614.33 million07/25/2025$9.05$9.63+6.41%$9.71$8.831.67 million shs$672.27 million07/24/2025$8.57$9.05+5.60%$9.16$8.271.02 million shs$631.78 million07/23/2025$7.90$8.57+8.48%$8.72$7.851.48 million shs$598.31 million07/22/2025$7.83$7.90+0.89%$7.90$7.61589,976 shs$551.50 million07/21/2025$7.95$7.83-1.51%$8.19$7.75667,010 shs$546.61 million Get the Latest News and Ratings for PHAT and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Phathom Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. 07/18/2025$8.32$7.95-4.45%$8.54$7.911.01 million shs$554.99 million07/17/2025$8.33$8.32-0.12%$8.65$8.07860,930 shs$580.82 million07/16/2025$8.54$8.33-2.46%$8.65$8.131.68 million shs$581.55 million07/15/2025$9.06$8.54-5.74%$9.14$8.29882,377 shs$596.18 million07/14/2025$9.18$9.06-1.31%$9.34$8.81542,360 shs$632.48 million07/11/2025$9.69$9.18-5.26%$9.70$9.18768,804 shs$640.86 million07/10/2025$9.37$9.69+3.42%$9.76$9.21619,638 shs$676.50 million07/09/2025$9.02$9.37+3.88%$9.56$8.91956,854 shs$654.12 million07/08/2025$8.66$9.02+4.16%$9.19$8.63737,396 shs$629.69 million07/07/2025$8.77$8.66-1.20%$8.92$8.191.32 million shs$604.56 million07/04/2025$8.77$8.77$9.00$8.50499,121 shs$611.89 million07/03/2025$8.91$8.77-1.63%$9.00$8.50499,121 shs$611.89 million07/02/2025$8.85$8.91+0.68%$9.25$8.781.82 million shs$622.04 million07/01/2025$9.59$8.85-7.72%$9.51$8.721.45 million shs$617.82 million Related Companies Organon & Co. 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