Phathom Pharmaceuticals (PHAT) Short Interest Ratio & Short Volume $3.90 -0.48 (-10.96%) Closing price 05/21/2025 04:00 PM EasternExtended Trading$3.78 -0.12 (-2.95%) As of 05/21/2025 07:28 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 Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Phathom Pharmaceuticals Short Interest DataPhathom Pharmaceuticals (PHAT) has a short interest of 10.92 million shares. This marks a -4.04% decrease in short interest from the previous month. The short interest ratio (days to cover) is 7.0, indicating that it would take 7.0 days of the average trading volume of 1.17 million shares to cover all short positions.Current Short Interest10,920,000 sharesPrevious Short Interest11,380,000 sharesChange Vs. Previous Month-4.04%Dollar Volume Sold Short$46.85 millionShort Interest Ratio7.0 Days to CoverLast Record DateApril 30, 2025Outstanding Shares69,814,000 sharesPercentage of Shares Shorted15.64%Today's Trading Volume1,184,617 sharesAverage Trading Volume1,172,751 sharesToday's Volume Vs. Average101% Short Selling Phathom Pharmaceuticals? Sign up to receive the latest short interest report for Phathom Pharmaceuticals and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartPHAT Short Interest Over TimePHAT Days to Cover Over TimePHAT Percentage of Float Shorted Over Time Phathom Pharmaceuticals Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 4/30/202510,920,000 shares $46.85 million -4.0%N/A7 $4.29 4/15/202511,380,000 shares $54.28 million -11.9%21.9%9.5 $4.77 3/31/202512,910,000 shares $80.95 million -10.1%24.9%10.9 $6.27 3/15/202514,360,000 shares $63.33 million +3.2%27.7%12.7 $4.41 2/28/202513,920,000 shares $76.84 million -6.3%26.8%13.3 $5.52 2/15/202514,860,000 shares $85.74 million +1.6%28.6%14.7 $5.77 1/31/202514,630,000 shares $87.63 million +3.0%N/A11.3 $5.99 1/15/202514,200,000 shares $101.25 million -5.0%N/A11.1 $7.13 12/31/202414,950,000 shares $121.39 million +5.8%N/A11.8 $8.12 12/15/202414,130,000 shares $111.49 million +0.6%N/A11 $7.89 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. 11/30/202414,050,000 shares $124.62 million -4.2%N/A10.7 $8.87 11/15/202414,660,000 shares $128.71 million -16.0%N/A10.9 $8.78 10/31/202417,450,000 shares $299.27 million -0.6%N/A16.3 $17.15 10/15/202417,560,000 shares $274.99 million +2.0%N/A18.5 $15.66 9/30/202417,220,000 shares $311.34 million +11.0%N/A18 $18.08 9/15/202415,520,000 shares $284.02 million +1.2%N/A17.4 $18.30 8/31/202415,340,000 shares $253.42 million +7.7%N/A19.8 $16.52 8/15/202414,250,000 shares $186.75 million +3.8%N/A20.4 $13.11 7/31/202413,730,000 shares $162.29 million +5.0%49.5%21 $11.82 7/15/202413,080,000 shares $165.72 million -2.4%47.1%20.5 $12.67 6/30/202413,400,000 shares $138.02 million +2.3%47.9%22.9 $10.30 6/15/202413,100,000 shares $148.69 million +6.2%46.8%20.7 $11.35 5/31/202412,330,000 shares $116.15 million +1.2%44.1%18.8 $9.42 5/15/202412,180,000 shares $126.79 million +3.2%43.2%16.3 $10.41 4/30/202411,800,000 shares $106.55 million -1.9%41.9%13.4 $9.03 4/15/202412,030,000 shares $120.54 million +13.0%43.5%13.7 $10.02 3/31/202410,650,000 shares $113.10 million +2.0%40.0%12 $10.62 3/15/202410,440,000 shares $88.64 million +20.4%40.1%13 $8.49 2/29/20248,670,000 shares $92.77 million -6.3%34.0%11.4 $10.70 2/15/20249,250,000 shares $63.83 million +7.2%36.3%13.2 $6.90 1/31/20248,630,000 shares $57.82 million +5.4%32.4%14.9 $6.70 1/15/20248,190,000 shares $61.92 million +15.7%30.8%14.3 $7.56 12/31/20237,080,000 shares $64.64 million +12.9%26.6%13.9 $9.13 12/15/20236,270,000 shares $54.67 million +14.0%23.6%12.9 $8.72 11/30/20235,500,000 shares $38.45 million +12.9%20.9%10.5 $6.99 11/15/20234,870,000 shares $35.75 million +18.2%18.5%10.4 $7.34 10/31/20234,120,000 shares $38.32 million +4.3%16.1%9.6 $9.30 10/15/20233,950,000 shares $39.86 million +0.8%15.4%10.9 $10.09 9/30/20233,920,000 shares $40.65 million +42.0%15.3%11.2 $10.37 9/15/20232,760,000 shares $36.16 million -0.4%10.8%8 $13.10Collect $7k per month from Tesla’s SECRET dividend (Ad)Tesla doesn't pay a traditional dividend.... But I just discovered a secret backdoor to collect a secret 69% dividend from Tesla… Which could put up to $7,013 in your pocket every month…Click here to discover the new #1 way to invest in Tesla 8/31/20232,770,000 shares $39.86 million +7.0%11.0%9.3 $14.39 8/15/20232,590,000 shares $39.98 million -18.8%10.3%7.4 $15.44 7/31/20233,190,000 shares $48.52 million -25.8%12.2%9.4 $15.21 7/15/20234,300,000 shares $60.46 million +1.7%15.9%12.9 $14.06 6/30/20234,230,000 shares $60.57 million -3.0%14.8%11.4 $14.32 6/15/20234,360,000 shares $55.02 million +4.8%15.2%10.6 $12.62 5/31/20234,160,000 shares $48.92 million -8.0%20.2%10 $11.76 5/15/20234,520,000 shares $56.91 million -7.2%24.7%10.9 $12.59 4/30/20234,870,000 shares $52.11 million +0.4%33.1%11.7 $10.70 4/15/20234,850,000 shares $48.40 million +33.6%27.5%11.5 $9.98 3/31/20233,630,000 shares $25.92 million +18.6%20.8%8.4 $7.14 3/15/20233,060,000 shares $21.42 million +2.7%17.5%7.7 $7.00 2/28/20232,980,000 shares $25.51 million +10.8%15.8%8.4 $8.56 2/15/20232,690,000 shares $25.04 million +18.5%14.3%7.8 $9.31 1/31/20232,270,000 shares $27.08 million +8.6%12.1%8.9 $11.93 1/15/20232,090,000 shares $17.28 million +10.6%11.0%9.1 $8.27 12/30/20221,890,000 shares $21.21 million +18.9%10.0%9.2 $11.22 12/15/20221,590,000 shares $16.15 million -0.6%8.4%11.7 $10.16 11/30/20221,600,000 shares $15.97 million -5.3%8.4%7.7 $9.98 11/15/20221,690,000 shares $17.46 million -8.2%8.9%8 $10.33 10/31/20221,840,000 shares $19.50 million -8.5%11.1%8.1 $10.60 10/15/20222,010,000 shares $19.58 million -54.5%12.1%6.9 $9.74 9/30/20224,420,000 shares $48.97 million -22.5%26.7%15.6 $11.08 9/15/20225,700,000 shares $56.83 million -1.0%29.7%19.3 $9.97 8/31/20225,760,000 shares $49.19 million +4.9%30.1%23 $8.54 8/15/20225,490,000 shares $63.41 million +73.2%28.7%20.6 $11.55 7/31/20223,170,000 shares $29.20 million -1.9%16.6%9.7 $9.21 7/15/20223,230,000 shares $31.10 million +0.3%16.6%11.9 $9.63 6/30/20223,220,000 shares $27.18 million -0.6%16.5%11.7 $8.44 6/15/20223,240,000 shares $21.22 million +2.5%16.6%12 $6.55 5/31/20223,160,000 shares $22.66 million +1.9%16.2%13.3 $7.17 5/15/20223,100,000 shares $24.77 million +24.0%15.9%14.7 $7.99 4/30/20222,500,000 shares $32.35 million +2.5%12.5%17.3 $12.94 4/15/20222,440,000 shares $35.97 million +17.9%19.3%19.7 $14.74 3/31/20222,070,000 shares $28.17 million +15.6%16.4%16.1 $13.61 3/15/20221,790,000 shares $20.67 million -50.6%14.2%14.3 $11.55 2/28/20223,620,000 shares $65.63 million +3.7%18.4%29.8 $18.13 2/15/20223,490,000 shares $68.75 million +2.1%17.7%26.6 $19.70 1/31/20223,420,000 shares $57.46 million -2.6%19.0%24.3 $16.80 1/15/20223,510,000 shares $53.21 million -20.4%19.5%22.7 $15.16 12/31/20214,410,000 shares $86.74 million +43.7%24.4%24 $19.67 12/15/20213,070,000 shares $58.70 million +2.7%17.0%17 $19.12 11/30/20212,990,000 shares $53.64 million -21.1%16.6%17.1 $17.94 11/15/20213,790,000 shares $81.75 million +6.8%21.0%23.1 $21.57 10/29/20213,550,000 shares $83.53 million +100.6%20.6%23.8 $23.53 10/15/20211,770,000 shares $57.54 million +17.2%10.3%15 $32.51 9/30/20211,510,000 shares $48.47 million +7.9%8.8%18.9 $32.10 9/15/20211,400,000 shares $46.44 million -12.5%8.1%14.4 $33.17 8/31/20211,600,000 shares $56.94 million +1.3%9.3%17.3 $35.59 8/13/20211,580,000 shares $50.56 million +21.5%9.2%16.5 $32.00Collect $7k per month from Tesla’s SECRET dividend (Ad)Tesla doesn't pay a traditional dividend.... But I just discovered a secret backdoor to collect a secret 69% dividend from Tesla… Which could put up to $7,013 in your pocket every month…Click here to discover the new #1 way to invest in Tesla 7/30/20211,300,000 shares $41.73 million +4.8%7.5%12.9 $32.10 7/15/20211,240,000 shares $42.45 million +0.8%7.2%11.9 $34.23 6/30/20211,230,000 shares $41.64 million +19.4%7.1%12 $33.85 6/15/20211,030,000 shares $34.43 million +3.1%6.0%11.2 $33.43 5/28/2021999,400 shares $35.33 million +2.6%5.8%10.1 $35.35 5/14/2021973,700 shares $33.10 million +39.6%6.0%9.9 $33.99 4/30/2021697,700 shares $27.78 million +15.4%4.3%7.1 $39.81 4/15/2021604,800 shares $23.19 million +6.5%3.8%6.3 $38.35 3/31/2021568,000 shares $20.62 million +3.7%3.5%5.7 $36.31 3/15/2021547,600 shares $24.75 million +31.4%3.4%4.4 $45.19 2/26/2021416,800 shares $19.19 million -11.8%2.6%2.9 $46.04 2/12/2021472,600 shares $21.03 million -1.9%3.0%3.4 $44.49 1/29/2021481,600 shares $18.84 million -15.8%3.0%3.6 $39.11 1/15/2021571,900 shares $21.88 million -29.3%3.6%4.4 $38.25 12/31/2020809,400 shares $27.26 million +21.6%5.5%6.9 $33.68 12/15/2020665,700 shares $29.60 million -12.6%4.6%6.5 $44.46 11/30/2020761,400 shares $32.84 million -5.0%5.6%13.9 $43.13 11/15/2020801,400 shares $32.50 million -4.1%6.0%16.4 $40.55 10/30/2020835,500 shares $33.08 million +0.6%6.3%17.6 $39.59 10/15/2020830,900 shares $32.45 million +1.6%6.3%18.1 $39.05 9/30/2020817,800 shares $29.99 million -2.0%6.2%16.2 $36.67 9/15/2020834,300 shares $29.62 million -4.3%6.3%14.7 $35.50 8/31/2020871,900 shares $32.05 million -5.3%6.6%11.5 $36.76 8/14/2020921,000 shares $36.52 million -13.1%7.0%10.7 $39.65 7/31/20201,060,000 shares $35.26 million -11.7%8.0%12.1 $33.26 7/15/20201,200,000 shares $36.07 million -4.0%9.1%13.9 $30.06 6/30/20201,250,000 shares $42.03 million +22.6%9.4%14.9 $33.62 6/15/20201,020,000 shares $44.00 million No Change7.7%12.7 $43.14 5/29/20201,020,000 shares $43.13 million +2.0%8.6%14.7 $42.28 PHAT Short Interest - Frequently Asked Questions What is Phathom Pharmaceuticals' current short interest? Short interest is the volume of Phathom Pharmaceuticals shares that have been sold short but have not yet been covered or closed out. As of April 30th, traders have sold 10,920,000 shares of PHAT short. Learn More on Phathom Pharmaceuticals' current short interest. What is a good short interest ratio for Phathom Pharmaceuticals? The short interest ratio, also known as the "days to cover ratio", is calculated by dividing the number of shares of a stock sold short divided by its average trading volume. A short interest ratio ranging between 1 and 4 generally indicates strong positive sentiment about a stock and a lack of short sellers. A short interest ratio of 10 or greater indicates strong pessimism about a stock. PHAT shares currently have a short interest ratio of 7.0. Learn More on Phathom Pharmaceuticals's short interest ratio. Which institutional investors are shorting Phathom Pharmaceuticals? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Phathom Pharmaceuticals: Simplex Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. Is Phathom Pharmaceuticals' short interest increasing or decreasing? Phathom Pharmaceuticals saw a decline in short interest in the month of April. As of April 30th, there was short interest totaling 10,920,000 shares, a decline of 4.0% from the previous total of 11,380,000 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment. How does Phathom Pharmaceuticals' short interest compare to its competitors? Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Phathom Pharmaceuticals: Pharvaris (3.73%), Ardelyx, Inc. (12.46%), LENZ Therapeutics, Inc. (13.80%), CureVac (5.31%), CorMedix Inc. (11.85%), Chimerix, Inc. (4.27%), Avid Bioservices, Inc. (18.17%), Cronos Group Inc. (2.09%), Praxis Precision Medicines, Inc. (9.30%), Nurix Therapeutics, Inc. (17.96%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Spotify Technology S.A. ($4.67 billion), Charter Communications, Inc. ($4.58 billion), Capital One Financial Co. ($4.47 billion), The Kroger Co. ($2.56 billion), Reddit, Inc. ($2.23 billion), Rivian Automotive, Inc. ($2.16 billion), Live Nation Entertainment, Inc. ($1.90 billion), SoFi Technologies, Inc. ($1.85 billion), Zscaler, Inc. ($1.75 billion), and Omnicom Group Inc. ($1.75 billion). View all of the most shorted stocks. What does it mean to sell short Phathom Pharmaceuticals stock? Short selling PHAT is an investing strategy that aims to generate trading profit from Phathom Pharmaceuticals as its price is falling. PHAT shares are trading down $0.48 today. To short a stock, an investor borrows shares, sells them and buys the shares back on the public market later to return it to the lender. Short sellers are betting that a stock will decline in price. If the stock does drop after selling, the short seller buys it back at a lower price and returns it to the lender. The difference between the sell price and the buy price is the trader's profit. How does a short squeeze work against Phathom Pharmaceuticals? A short squeeze for Phathom Pharmaceuticals occurs when it has a large amount of short interest and its stock increases in price. This forces short sellers to cover their short interest positions by buying actual shares of PHAT, which in turn drives the price of the stock up even further. How often is Phathom Pharmaceuticals' short interest reported? Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including PHAT, twice per month. The most recent reporting period available is April, 30 2025. More Short Interest Resources from MarketBeat Related Companies PHVS Short Squeeze ARDX Short Squeeze LENZ Short Squeeze CVAC Short Squeeze CRMD Short Squeeze CMRX Short Squeeze CDMO Short Squeeze CRON Short Squeeze PRAX Short Squeeze NRIX Short Squeeze Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:PHAT) was last updated on 5/22/2025 by MarketBeat.com Staff From Our PartnersJuly 2025 Rule Change to Impact Retirement InvestorsThere's a massive change from a new rule going into effect this July. 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