Live Earnings Conference Call: Geron will host a live Q2 2025 earnings call on August 6, 2025 at 8:00AM ET. Follow this link to get details and listen to Geron's Q2 2025 earnings call when it goes live. Get details. Geron (GERN) Short Interest Ratio & Short Volume $1.20 -0.01 (-0.83%) Closing price 08/5/2025 04:00 PM EasternExtended Trading$1.22 +0.02 (+1.67%) As of 04:06 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 Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Geron Short Interest DataGeron (GERN) has a short interest of 67.96 million shares. This marks a 7.89% increase in short interest from the previous month. The short interest ratio (days to cover) is 6.5, indicating that it would take 6.5 days of the average trading volume of 9.59 million shares to cover all short positions.Current Short Interest67,960,000 sharesPrevious Short Interest62,990,000 sharesChange Vs. Previous Month+7.89%Dollar Volume Sold Short$85.63 millionShort Interest Ratio6.5 Days to CoverLast Record DateJuly 15, 2025Outstanding Shares636,920,000 sharesPercentage of Shares Shorted10.67%Today's Trading Volume8,535,231 sharesAverage Trading Volume9,593,764 sharesToday's Volume Vs. Average89% Short Selling Geron? Sign up to receive the latest short interest report for Geron and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartGERN Short Interest Over TimeGERN Days to Cover Over TimeGERN Percentage of Float Shorted Over Time Geron Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 7/15/202567,960,000 shares $85.63 million +7.9%N/A6.5 $1.26 6/30/202562,990,000 shares $88.82 million -3.4%10.7%5.6 $1.41 6/15/202565,230,000 shares $98.50 million +1.0%11.1%5.4 $1.51 5/31/202564,580,000 shares $99.78 million -3.9%11.0%5 $1.55 5/15/202567,190,000 shares $81.30 million +5.2%11.5%4.5 $1.21 4/30/202563,860,000 shares $90.04 million +2.6%N/A4.2 $1.41 4/15/202562,230,000 shares $77.79 million +3.9%10.6%4.1 $1.25 3/31/202559,890,000 shares $95.23 million +31.3%10.2%4 $1.59 3/15/202545,630,000 shares $74.83 million -21.9%7.8%3 $1.64 2/28/202558,410,000 shares $102.80 million -16.3%10.0%4.1 $1.76 Get the Latest News and Ratings for GERN and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Geron and its competitors with MarketBeat's FREE daily newsletter. 2/15/202569,770,000 shares $178.61 million -6.4%11.9%5.6 $2.56 1/31/202574,570,000 shares $214.02 million +1.2%N/A6.7 $2.87 1/15/202573,710,000 shares $221.87 million +13.3%N/A7.3 $3.01 12/31/202465,070,000 shares $230.35 million +0.9%N/A6.6 $3.54 12/15/202464,520,000 shares $249.05 million -2.8%N/A7.7 $3.86 11/30/202466,350,000 shares $273.36 million -5.4%N/A8.2 $4.12 11/15/202470,130,000 shares $256.68 million -8.0%N/A8.2 $3.66 10/31/202476,240,000 shares $313.35 million -3.3%N/A9.4 $4.11 10/15/202478,830,000 shares $330.30 million -2.7%N/A8.9 $4.19 9/30/202481,030,000 shares $367.88 million +13.3%N/A9.1 $4.54 9/15/202471,510,000 shares $322.51 million +6.5%N/A7.5 $4.51 8/31/202467,140,000 shares $318.92 million -2.9%N/A5.8 $4.75 8/15/202469,110,000 shares $308.23 million +19.4%N/A5.8 $4.46 7/31/202457,860,000 shares $274.26 million +29.6%N/A4.9 $4.74 7/15/202444,660,000 shares $218.83 million -5.1%N/A3.9 $4.90 6/30/202447,050,000 shares $199.49 million -13.1%N/A4 $4.24 6/15/202454,120,000 shares $263.56 million -1.6%N/A4.6 $4.87 5/31/202455,010,000 shares $195.29 million +2.1%N/A3.8 $3.55 5/15/202453,890,000 shares $210.17 million +3.0%N/A4.3 $3.90 4/30/202452,340,000 shares $205.70 million +5.9%N/A4.1 $3.93 4/15/202449,420,000 shares $170.50 million +5.9%N/A4 $3.45 3/31/202446,660,000 shares $153.98 million -8.4%N/A4.2 $3.30 3/15/202450,950,000 shares $171.19 million +13.5%N/A4.7 $3.36 2/29/202444,910,000 shares $89.82 million +3.1%N/A6.1 $2.00 2/15/202443,570,000 shares $91.06 million +7.1%N/A6.9 $2.09 1/31/202440,690,000 shares $74.87 million +2.3%N/A7 $1.84 1/15/202439,790,000 shares $80.77 million -7.9%N/A7.6 $2.03 12/31/202343,220,000 shares $91.19 million -6.8%N/A8.1 $2.11 12/15/202346,370,000 shares $104.33 million +4.3%N/A8.5 $2.25 11/30/202344,440,000 shares $85.77 million -0.1%N/A8 $1.93Crypto bros: Meet your replacement (Ad)Larry Benedict made $274 million trading on Wall Street… Barron’s ranked his hedge fund in the top 1% worldwide. Now he’s applying the same expertise to the Bitcoin market. His system tracks 19 indicators to find quick Bitcoin profit opportunities.Now he’s revealing the entire thing… FREE. 11/15/202344,480,000 shares $86.29 million -1.4%N/A7.9 $1.94 10/31/202345,120,000 shares $85.73 million +0.4%N/A7.7 $1.90 10/15/202344,940,000 shares $79.99 million +3.6%N/A8.1 $1.78 9/30/202343,400,000 shares $92.01 million +6.7%N/A8.3 $2.12 9/15/202340,680,000 shares $89.90 million +22.2%N/A8 $2.21 8/31/202333,290,000 shares $80.89 million +17.6%N/A6.2 $2.43 8/15/202328,300,000 shares $84.33 million +5.0%N/A5 $2.98 7/31/202326,950,000 shares $87.32 million +2.5%N/A4.8 $3.24 7/15/202326,300,000 shares $84.69 million -5.3%N/A4.4 $3.22 6/30/202327,760,000 shares $89.11 million -2.4%N/A4.3 $3.21 6/15/202328,440,000 shares $86.17 million -1.8%N/A4.3 $3.03 5/31/202328,960,000 shares $94.70 million +25.4%N/A4.6 $3.27 5/15/202323,100,000 shares $70.22 million -2.2%N/A4.1 $3.04 4/30/202323,610,000 shares $58.08 million +5.3%N/A4.3 $2.46 4/15/202322,420,000 shares $44.17 million -8.7%N/A4 $1.97 3/31/202324,550,000 shares $53.27 million -5.1%N/A4.1 $2.17 3/15/202325,860,000 shares $67.75 million +5.1%N/A2.9 $2.62 2/28/202324,600,000 shares $68.39 million +3.8%N/A2.9 $2.78 2/15/202323,710,000 shares $63.78 million -3.4%N/A2.8 $2.69 1/31/202324,550,000 shares $81.02 million +8.1%N/A3 $3.30 1/15/202322,710,000 shares $71.76 million -22.2%N/A2.8 $3.16 12/30/202229,190,000 shares $70.64 million +26.4%N/A3.9 $2.42 12/15/202223,100,000 shares $53.13 million +24.5%N/A6 $2.30 11/30/202218,550,000 shares $43.04 million -2.5%N/A5.3 $2.32 11/15/202219,020,000 shares $43.18 million +15.3%N/A5.2 $2.27 10/31/202216,500,000 shares $36.63 million +14.9%N/A4.1 $2.22 10/15/202214,360,000 shares $31.59 million +6.7%N/A3.6 $2.20 9/30/202213,460,000 shares $31.50 million +12.1%N/A3.7 $2.34 9/15/202212,010,000 shares $34.83 million -23.0%N/A3.1 $2.90 8/31/202215,600,000 shares $41.18 million -17.6%N/A4.3 $2.64 8/15/202218,920,000 shares $44.84 million +17.2%N/A5.9 $2.37 7/31/202216,150,000 shares $30.69 million -2.2%N/A5.5 $1.90 7/15/202216,510,000 shares $30.05 million -33.1%N/A6.4 $1.82 6/30/202224,670,000 shares $38.24 million -7.6%N/A9.3 $1.55 6/15/202226,700,000 shares $34.71 million +7.1%14.4%9.7 $1.30 5/31/202224,940,000 shares $34.42 million +7.2%N/A10 $1.38 5/15/202223,260,000 shares $33.73 million +5.1%N/A9.3 $1.45 4/30/202222,130,000 shares $31.20 million +4.5%N/A9.5 $1.41 4/15/202221,170,000 shares $32.60 million -21.0%N/A9 $1.54 3/31/202226,780,000 shares $36.42 million +4.5%N/A11.5 $1.36 3/15/202225,640,000 shares $26.67 million +15.6%8.4%12.8 $1.04 2/28/202222,190,000 shares $24.19 million +1.6%7.3%10.7 $1.09 2/15/202221,840,000 shares $23.15 million +16.4%7.2%10.3 $1.06 1/31/202218,770,000 shares $21.02 million +0.6%6.2%8.8 $1.12 1/15/202218,660,000 shares $22.39 million +6.6%N/A8.5 $1.20 12/31/202117,510,000 shares $21.36 million -9.9%5.8%8.4 $1.22 12/15/202119,430,000 shares $26.62 million +11.0%6.4%10.4 $1.37 11/30/202117,510,000 shares $25.91 million -6.7%5.8%9.6 $1.48 11/15/202118,770,000 shares $28.34 million No Change6.1%10.5 $1.51 10/29/202118,770,000 shares $28.91 million -3.7%6.1%10.4 $1.54Crypto bros: Meet your replacement (Ad)Larry Benedict made $274 million trading on Wall Street… Barron’s ranked his hedge fund in the top 1% worldwide. Now he’s applying the same expertise to the Bitcoin market. His system tracks 19 indicators to find quick Bitcoin profit opportunities.Now he’s revealing the entire thing… FREE. 10/15/202119,500,000 shares $27.50 million +7.4%6.4%11.2 $1.41 9/30/202118,160,000 shares $24.88 million -11.1%5.9%10.1 $1.37 9/15/202120,420,000 shares $27.77 million -11.3%6.7%9.3 $1.36 8/31/202123,010,000 shares $33.36 million -8.2%7.5%2.8 $1.45 8/13/202125,070,000 shares $30.59 million +3.2%8.2%3 $1.22 7/30/202124,300,000 shares $29.65 million +1.5%8.0%2.9 $1.22 7/15/202123,940,000 shares $29.93 million +3.2%7.9%2.9 $1.25 6/30/202123,190,000 shares $32.70 million -9.2%7.6%2.8 $1.41 6/15/202125,530,000 shares $35.49 million -4.9%8.4%3.2 $1.39 5/28/202126,840,000 shares $37.04 million -2.2%8.8%12.4 $1.38 5/14/202127,440,000 shares $36.77 million +5.7%N/A10.5 $1.34 4/30/202125,950,000 shares $39.18 million -5.4%N/A8.4 $1.51 4/15/202127,440,000 shares $41.43 million -0.4%N/A0 $1.51 3/31/202127,550,000 shares $41.88 million -23.4%N/A7.2 $1.52 3/15/202135,950,000 shares $61.83 million -1.3%N/A9 $1.72 2/26/202136,430,000 shares $65.94 million +0.1%N/A10 $1.81 2/12/202136,390,000 shares $69.50 million -1.6%N/A10.5 $1.91 1/29/202136,990,000 shares $63.25 million -0.4%N/A12 $1.71 1/15/202137,150,000 shares $62.97 million -32.7%N/A15.2 $1.70 12/31/202055,230,000 shares $87.82 million +11.4%N/A22.5 $1.59 12/15/202049,590,000 shares $86.29 million +2.8%N/A19.8 $1.74 11/30/202048,220,000 shares $90.17 million +0.1%N/A17.3 $1.87 11/15/202048,170,000 shares $94.89 million +1.5%N/A16.5 $1.97 10/30/202047,470,000 shares $86.40 million +6.8%N/A16.4 $1.82 10/15/202044,450,000 shares $91.12 million +0.6%N/A15 $2.05 9/30/202044,180,000 shares $76.87 million +32.4%N/A15 $1.74 9/15/202033,360,000 shares $61.72 million -1.8%N/A10.9 $1.85 8/31/202033,960,000 shares $69.62 million +7.2%N/A10.8 $2.05 8/14/202031,690,000 shares $51.97 million -2.0%N/A9.7 $1.64 GERN Short Interest - Frequently Asked Questions What is Geron's current short interest? Short interest is the volume of Geron shares that have been sold short but have not yet been closed out or covered. As of July 15th, investors have sold 67,960,000 shares of GERN short. Learn More on Geron's current short interest. What is a good short interest ratio for Geron? 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. GERN shares currently have a short interest ratio of 6.0. Learn More on Geron's short interest ratio. Which institutional investors are shorting Geron? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Geron: Simplex Trading LLC, and Simplex Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. Is Geron's short interest increasing or decreasing? Geron saw a increase in short interest in the month of July. As of July 15th, there was short interest totaling 67,960,000 shares, an increase of 7.9% from the previous total of 62,990,000 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 Geron's short interest compare to its competitors? Here is how the short interest of companies in the industry of "biotechnology" compare to Geron: Alkermes plc (7.61%), Ligand Pharmaceuticals Incorporated (6.38%), Amicus Therapeutics, Inc. (7.05%), BioCryst Pharmaceuticals, Inc. (12.80%), Celldex Therapeutics, Inc. (12.76%), Dynavax Technologies Corporation (13.25%), MannKind Corporation (8.05%), Innoviva, Inc. (16.02%), Novavax, Inc. (26.60%), OPKO Health, Inc. (9.26%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Coinbase Global, Inc. ($5.11 billion), Charter Communications, Inc. ($4.76 billion), Reddit Inc. ($2.84 billion), SoFi Technologies, Inc. ($2.79 billion), Seagate Technology Holdings PLC ($2.79 billion), Live Nation Entertainment, Inc. ($2.67 billion), Rocket Lab Corporation ($2.49 billion), AST SpaceMobile, Inc. ($2.12 billion), Moderna, Inc. ($2.09 billion), and Omnicom Group Inc. ($2.04 billion). View all of the most shorted stocks. What does it mean to sell short Geron stock? Short selling GERN is an investing strategy that aims to generate trading profit from Geron as its price is falling. GERN shares are trading down $0.01 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 Geron? A short squeeze for Geron 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 GERN, which in turn drives the price of the stock up even further. How often is Geron's 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 GERN, twice per month. The most recent reporting period available is July, 15 2025. More Short Interest Resources from MarketBeat Related Companies Alkermes Short Interest Data Ligand Pharmaceuticals Short Interest Data Amicus Therapeutics Short Interest Data BioCryst Pharmaceuticals Short Interest Data Celldex Therapeutics Short Interest Data Dynavax Technologies Short Interest Data MannKind Short Interest Data Innoviva Short Interest Data Novavax Short Interest Data OPKO Health Short Interest Data Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:GERN) was last updated on 8/6/2025 by MarketBeat.com Staff From Our PartnersINVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting OffRight now, we’re witnessing a monumental shift in the world.Traders Agency | SponsoredGENIUS Act: Cancel Your Money?They said digital dollars were off the table. 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