Actinium Pharmaceuticals (ATNM) Short Interest Ratio & Short Volume $1.63 -0.05 (-2.98%) Closing price 04:00 PM EasternExtended Trading$1.66 +0.03 (+1.78%) As of 05:31 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 ForecastsChartCompetitorsHeadlinesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Actinium Pharmaceuticals Short Interest DataActinium Pharmaceuticals (ATNM) has a short interest of 921,200 shares, representing 3.14% of the float (the number of shares available for trading by the public). This marks a -8.79% decrease in short interest from the previous month. The short interest ratio (days to cover) is 3.2, indicating that it would take 3.2 days of the average trading volume of 392,228 shares to cover all short positions.Current Short Interest921,200 sharesPrevious Short Interest1,010,000 sharesChange Vs. Previous Month-8.79%Dollar Volume Sold Short$1.64 millionShort Interest Ratio3.2 Days to CoverLast Record DateAugust 31, 2025Outstanding Shares31,196,000 sharesShort Percent of Float3.14%Today's Trading Volume102,753 sharesAverage Trading Volume392,228 sharesToday's Volume Vs. Average26% Short Selling Actinium Pharmaceuticals? Sign up to receive the latest short interest report for Actinium Pharmaceuticals and its competitors with MarketBeat's FREE newsletter. Email Address Get Report View SMS TermsBy entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartATNM Short Interest Over TimeATNM Days to Cover Over TimeATNM Percentage of Float Shorted Over Time Actinium 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 8/31/2025921,200 shares $1.64 million -8.8%3.1%3.2 $1.78 8/15/20251,010,000 shares $1.71 million +28.5%N/A3.5 $1.69 7/31/2025785,900 shares $1.28 million -23.7%2.7%2.5 $1.63 7/15/20251,030,000 shares $1.56 million -22.6%N/A2.9 $1.52 6/30/20251,330,000 shares $1.86 million -7.0%4.5%3.6 $1.40 6/15/20251,430,000 shares $2.13 million -25.9%4.9%2.2 $1.49 5/31/20251,930,000 shares $2.97 million +5.5%6.6%3 $1.54 5/15/20251,830,000 shares $2.80 million -19.7%N/A2.9 $1.53 4/30/20252,280,000 shares $3.47 million +36.5%N/A3.7 $1.52 4/15/20251,670,000 shares $2.10 million -34.0%N/A2.8 $1.26 Get the Latest News and Ratings for ATNM and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Actinium Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. 3/14/20252,210,000 shares $2.72 million -1.8%N/A6.8 $1.23 2/28/20252,250,000 shares $2.59 million +1.8%N/A8.9 $1.15 2/14/20252,210,000 shares $2.54 million +9.4%N/A8.3 $1.15 1/31/20252,020,000 shares $2.34 million -2.9%N/A7 $1.16 1/15/20252,080,000 shares $2.54 million +2.0%N/A7 $1.22 7/15/20242,150,000 shares $0.00 +14.4%N/A8.2 $0.00 6/30/20241,880,000 shares $0.00 +9.9%N/A6.9 $0.00 6/15/20241,710,000 shares $0.00 -5.5%N/A5.7 $0.00 5/31/20241,810,000 shares $0.00 -13.4%N/A4.6 $0.00 5/15/20242,090,000 shares $0.00 -10.3%N/A5.2 $0.00 4/30/20242,330,000 shares $0.00 +17.7%N/A6.2 $0.00 4/15/20241,980,000 shares $0.00 -9.6%N/A5.6 $0.00 3/31/20242,190,000 shares $0.00 +20.3%N/A6.6 $0.00 3/15/20241,820,000 shares $12.29 million +1.1%N/A5.8 $6.75 2/29/20241,800,000 shares $15.35 million -3.2%N/A8.3 $8.53 2/15/20241,860,000 shares $0.00 +0.5%N/A8.5 $0.00 1/31/20241,850,000 shares $9.95 million -7.0%N/A9.1 $5.38 1/15/20241,990,000 shares $0.00 +2.1%N/A9.4 $0.00 12/31/20231,950,000 shares $0.00 +2.6%N/A9.4 $0.00 12/15/20231,900,000 shares $0.00 -6.9%N/A9.4 $0.00 11/30/20232,040,000 shares $9.34 million +10.3%N/A10.5 $4.58 11/15/20231,850,000 shares $0.00 -7.5%N/A9.7 $0.00 10/31/20232,000,000 shares $0.00 -2.0%N/A10.7 $0.00 10/15/20232,040,000 shares $0.00 -1.0%N/A12.1 $0.00 9/30/20232,060,000 shares $0.00 +5.6%N/A12.2 $0.00 9/15/20231,950,000 shares $0.00 -5.3%N/A11.7 $0.00 8/31/20232,060,000 shares $0.00 -2.4%N/A9.2 $0.00 8/15/20232,110,000 shares $0.00 No ChangeN/A9.9 $0.00 7/31/20232,110,000 shares $0.00 -0.9%N/A9.7 $0.00 7/15/20232,130,000 shares $0.00 -0.5%N/A8.8 $0.00 6/30/20232,140,000 shares $0.00 +27.4%N/A8.7 $0.00 6/15/20231,680,000 shares $0.00 +37.7%N/A6.6 $0.00 5/31/20231,220,000 shares $10.13 million -29.1%N/A5.8 $8.30 5/15/20231,720,000 shares $0.00 +30.3%N/A4.8 $0.00 4/30/20231,320,000 shares $0.00 -27.5%N/A3.4 $0.00 4/15/20231,820,000 shares $0.00 -4.2%N/A4.7 $0.00 3/31/20231,900,000 shares $17.96 million +31.9%N/A4.6 $9.45 3/15/20231,440,000 shares $13.45 million -2.0%N/A3.5 $9.34 2/28/20231,470,000 shares $14.19 million -9.8%N/A3.6 $9.65 2/15/20231,630,000 shares $0.00 +4.5%N/A3.9 $0.00 1/31/20231,560,000 shares $18.28 million +39.3%N/A5 $11.72 1/15/20231,120,000 shares $0.00 +0.9%N/A2 $0.00 12/30/20221,110,000 shares $11.82 million -3.5%N/A2.1 $10.65 12/15/20221,150,000 shares $0.00 -6.5%N/A2.2 $0.00 11/30/20221,230,000 shares $0.00 +36.8%N/A2.5 $0.00 11/15/2022899,200 shares $0.00 +84.9%N/A1.8 $0.00 10/31/2022486,400 shares $0.00 +23.2%N/A1.1 $0.00 10/15/2022394,900 shares $0.00 +5.3%N/A2.8 $0.00 9/30/2022374,900 shares $0.00 +6.4%N/A2.8 $0.00 9/15/2022352,500 shares $0.00 -10.2%N/A2.5 $0.00 8/31/2022392,700 shares $0.00 +5.7%N/A2.9 $0.00 8/15/2022371,500 shares $0.00 +2.7%N/A3 $0.00 7/31/2022361,700 shares $0.00 -2.7%N/A2.2 $0.00 7/15/2022371,700 shares $1.88 million -15.8%N/A1.6 $5.05 6/30/2022441,500 shares $0.00 -20.5%N/A0.5 $0.00 6/15/2022555,300 shares $0.00 -23.9%N/A0.6 $0.00 5/31/2022729,900 shares $0.00 -17.3%N/A0.8 $0.00 5/15/2022883,000 shares $0.00 -4.8%N/A1 $0.00 4/30/2022927,200 shares $0.00 -30.8%N/A1.1 $0.00 4/15/20221,340,000 shares $0.00 +137.7%N/A1.7 $0.00 3/31/2022563,800 shares $2.88 million -4.2%N/A6.3 $5.11 3/15/2022588,500 shares $0.00 -5.1%N/A5.8 $0.00 2/28/2022620,300 shares $0.00 -26.4%N/A5.7 $0.00 2/15/2022843,100 shares $0.00 +0.7%N/A7.5 $0.00 1/31/2022837,500 shares $4.53 million -3.2%N/A7.1 $5.41 1/15/2022864,900 shares $0.00 +1.0%N/A6.8 $0.00 12/31/2021856,800 shares $5.15 million -0.5%N/A6.6 $6.01 12/15/2021860,700 shares $0.00 -3.4%N/A5.1 $0.00 11/30/2021891,200 shares $6.39 million -8.9%N/A4.1 $7.17 11/15/2021977,900 shares $0.00 -6.0%N/A4.2 $0.00 10/29/20211,040,000 shares $8.16 million -1.0%N/A4.4 $7.85 10/15/20211,050,000 shares $0.00 -6.3%N/A4.5 $0.00 9/30/20211,120,000 shares $0.00 +36.3%5.6%4.7 $0.00 9/15/2021821,700 shares $0.00 -1.6%4.1%3.7 $0.00 8/31/2021834,700 shares $0.00 -13.1%4.2%4.9 $0.00 8/13/2021960,700 shares $0.00 -3.0%4.8%5.6 $0.00 7/30/2021989,900 shares $0.00 +5.4%5.0%5.9 $0.00 7/15/2021939,500 shares $0.00 +3.0%4.7%5.4 $0.00 6/30/2021912,300 shares $0.00 +16.4%4.6%4.9 $0.00 6/15/2021783,700 shares $0.00 -8.6%4.0%3.5 $0.00 5/28/2021857,100 shares $0.00 -3.3%4.4%4 $0.00 5/14/2021886,600 shares $0.00 +2.6%4.6%3.7 $0.00 4/30/2021864,400 shares $0.00 -6.7%4.7%3 $0.00 4/15/2021926,500 shares $6.84 million -1.2%5.1%2.7 $7.38 3/31/2021937,700 shares $7.37 million +7.4%5.1%2.4 $7.86 3/15/2021873,100 shares $6.78 million +8.7%6.8%1.8 $7.76 2/26/2021803,300 shares $6.67 million +14.5%6.2%1.5 $8.30 2/12/2021701,500 shares $5.65 million -13.0%5.4%1.3 $8.06 1/29/2021806,700 shares $6.56 million -20.9%6.0%1.5 $8.13 1/15/20211,020,000 shares $9.69 million -3.8%7.5%2 $9.50 12/31/20201,060,000 shares $8.65 million +3.9%7.8%2.1 $8.16 12/15/20201,020,000 shares $11.97 million +29.1%7.5%2.7 $11.74 11/30/2020790,300 shares $8.84 million +18.6%5.8%2.2 $11.19 11/15/2020666,300 shares $8.00 million +1.7%4.9%1.9 $12.01 10/30/2020654,900 shares $6.68 million +22.0%4.8%1.7 $10.20 10/15/2020536,800 shares $5.95 million -4.8%4.0%1.1 $11.08 9/30/2020563,600 shares $5.46 million -5.6%4.2%1 $9.69 9/15/2020596,700 shares $5.61 million -6.5%4.4%1 $9.41 ATNM Short Interest - Frequently Asked Questions What is Actinium Pharmaceuticals' current short interest? Short interest is the volume of Actinium Pharmaceuticals shares that have been sold short but have not yet been covered or closed out. As of August 31st, traders have sold 921,200 shares of ATNM short. 3.14% of Actinium Pharmaceuticals' shares are currently sold short. Learn More on Actinium Pharmaceuticals' current short interest. What is a good short interest ratio for Actinium 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. ATNM shares currently have a short interest ratio of 3.0. Learn More on Actinium Pharmaceuticals's short interest ratio. Which institutional investors are shorting Actinium Pharmaceuticals? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Actinium Pharmaceuticals: Group One Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Actinium Pharmaceuticals? Companies that have a short interest as a percentage of float below 10% indicates positive investor sentiment and few short sellers. Stocks with a short interest percentage above 10% is considered high, suggesting some investors are pessimistic about the stock. Companies with a short interest percentage of 20% or more indicates widespread negative sentiment. 3.14% of Actinium Pharmaceuticals' floating shares are currently sold short. Is Actinium Pharmaceuticals' short interest increasing or decreasing? Actinium Pharmaceuticals saw a decrease in short interest in the month of August. As of August 31st, there was short interest totaling 921,200 shares, a decrease of 8.8% from the previous total of 1,010,000 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 Actinium Pharmaceuticals' short interest compare to its competitors? 3.14% of Actinium Pharmaceuticals' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Actinium Pharmaceuticals: GENFIT S.A. Unsponsored ADR (0.06%), Tiziana Life Sciences Ltd (1.25%), Eupraxia Pharmaceuticals Inc. (0.66%), C4 Therapeutics, Inc. (5.82%), Cognition Therapeutics, Inc. (15.60%), Enanta Pharmaceuticals, Inc. (14.25%), Innate Pharma S.A. Sponsored ADR (0.08%), China SXT Pharmaceuticals, Inc. (0.04%), Aardvark Therapeutics, Inc. (5.38%), Journey Medical Corporation (15.14%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($73.23 billion), Invesco QQQ ($29.52 billion), iShares Russell 2000 ETF ($20.82 billion), iShares 20+ Year Treasury Bond ETF ($10.76 billion), Palo Alto Networks, Inc. ($9.37 billion), Strategy Inc ($7.58 billion), Invesco S&P 500 Equal Weight ETF ($6.78 billion), SPDR S&P Biotech ETF ($6.72 billion), AppLovin Corporation ($6.37 billion), and iShares iBoxx $ Investment Grade Corporate Bond ETF ($6.29 billion). View all of the most shorted stocks. What does it mean to sell short Actinium Pharmaceuticals stock? Short selling ATNM is an investing strategy that aims to generate trading profit from Actinium Pharmaceuticals as its price is falling. ATNM shares are trading down $0.05 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 Actinium Pharmaceuticals? A short squeeze for Actinium Pharmaceuticals occurs when it has a large amount of short interest and its stock appreciates in price. This forces short sellers to cover their short interest positions by buying actual shares of ATNM, which in turn drives the price of the stock up even further. How often is Actinium 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 ATNM, twice per month. The most recent reporting period available is August, 31 2025. More Short Interest Resources from MarketBeat Related Companies GNFT Short Squeeze TLSA Short Squeeze EPRX Short Squeeze CCCC Short Squeeze CGTX Short Squeeze ENTA Short Squeeze IPHA Short Squeeze SXTC Short Squeeze AARD Short Squeeze DERM Short Squeeze Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NYSE:ATNM) was last updated on 9/12/2025 by MarketBeat.com Staff From Our PartnersCritical AI announcement set to ignite AI 2.0I just put together an urgent new presentation that you need to see right away. In short: I believe we are...Timothy Sykes | SponsoredForget NVDA. Put $1,000 into this stock nowA massive money shift is underway in the AI market. 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