Altimmune (ALT) Short Interest Ratio & Short Volume

Short interest is the volume of Altimmune shares that have been sold short but have not yet been closed out or covered. As of April 15th, traders have sold 22,440,000 shares of ALT short. 32.90% of Altimmune's shares are currently sold short. Learn More on Altimmune's current short interest.

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. ALT shares currently have a short interest ratio of 9.0. Learn More on Altimmune's short interest ratio.

As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Altimmune: IMC Chicago LLC, Jefferies Financial Group Inc., Wolverine Trading LLC, Jefferies Financial Group Inc., Group One Trading LLC, Citadel Advisors LLC, Jane Street Group LLC, Boothbay Fund Management LLC, Susquehanna International Group LLP, Concourse Financial Group Securities Inc., PEAK6 LLC, Walleye Trading LLC, Walleye Capital LLC, Valence8 US LP, and Simplex Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission.

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. 32.90% of Altimmune's floating shares are currently sold short.

Altimmune saw a increase in short interest during the month of April. As of April 15th, there was short interest totaling 22,440,000 shares, an increase of 2.8% from the previous total of 21,820,000 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.

32.90% of Altimmune's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Altimmune: ANI Pharmaceuticals, Inc. (12.86%), Immunocore Holdings plc (15.77%), Evotec SE (0.20%), Vera Therapeutics, Inc. (12.42%), Mesoblast Limited (2.64%), ARS Pharmaceuticals, Inc. (29.37%), Structure Therapeutics Inc. (12.89%), Ocular Therapeutix, Inc. (9.29%), Dyne Therapeutics, Inc. (18.94%), Ardelyx, Inc. (13.55%),

As of the most recent reporting period, the following stocks had the largest short interest positions: Invesco QQQ ($21.71 billion), iShares 20+ Year Treasury Bond ETF ($9.48 billion), Strategy Incorporated ($8.92 billion), Charter Communications, Inc. ($3.86 billion), Apollo Global Management, Inc. ($3.86 billion), Capital One Financial Co. ($3.72 billion), Super Micro Computer, Inc. ($3.47 billion), AppLovin Co. ($2.64 billion), VanEck Semiconductor ETF ($2.46 billion), and The Kroger Co. ($2.33 billion). View all of the most shorted stocks.

Short selling ALT is an investing strategy that aims to generate trading profit from Altimmune as its price is falling. ALT shares are trading up $0.60 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.

A short squeeze for Altimmune 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 ALT, which in turn drives the price of the stock up even further.

Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including ALT, twice per month. The most recent reporting period available is April, 15 2025.