Athira Pharma (ATHA) Short Interest Ratio & Short Volume

Short interest is the volume of Athira Pharma shares that have been sold short but have not yet been closed out or covered. As of May 31st, traders have sold 894,900 shares of ATHA short. 2.66% of Athira Pharma's shares are currently sold short. Learn More on Athira Pharma'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. ATHA shares currently have a short interest ratio of 2.0. Learn More on Athira Pharma's short interest ratio.

As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Athira Pharma: 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. 2.66% of Athira Pharma's floating shares are currently sold short.

Athira Pharma saw a increase in short interest in May. As of May 31st, there was short interest totaling 894,900 shares, an increase of 19.4% from the previous total of 749,800 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.

Athira Pharma currently has issued a total of 39,042,000 shares. Some of Athira Pharma's outstanding shares are available for trading, while others are subject to various restrictions. The public float, also referred to as floating shares or "the float", are shares that publicly owned, unrestricted and available to trade on the open market. Athira Pharma currently has a public float of 33,690,000 shares.

2.66% of Athira Pharma's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Athira Pharma: Imunon, Inc. (33.31%), Clene Inc. (4.74%), Anebulo Pharmaceuticals, Inc. (0.13%), Barinthus Biotherapeutics plc (0.11%), Biodexa Pharmaceuticals Plc (1.01%), Aadi Bioscience, Inc. (6.58%), Reviva Pharmaceuticals Holdings, Inc. (13.47%), Alterity Therapeutics Limited (0.88%), Kronos Bio, Inc. (1.91%), Iterum Therapeutics plc (2.76%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($64.96 billion), Invesco QQQ ($27.88 billion), iShares Russell 2000 ETF ($19.94 billion), iShares 20+ Year Treasury Bond ETF ($9.69 billion), Strategy Incorporated ($8.58 billion), SPDR S&P Biotech ETF ($5.72 billion), Invesco S&P 500 Equal Weight ETF ($5.45 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($4.70 billion), Charter Communications, Inc. ($4.54 billion), and Industrial Select Sector SPDR Fund ($4.49 billion). View all of the most shorted stocks.

Short selling ATHA is an investing strategy that aims to generate trading profit from Athira Pharma as its price is falling. ATHA shares are trading down $0.02 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 Athira Pharma 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 ATHA, 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 ATHA, twice per month. The most recent reporting period available is May, 31 2025.