Inspire Medical Systems (INSP) Short Interest Ratio & Short Volume

Short interest is the volume of Inspire Medical Systems shares that have been sold short but have not yet been covered or closed out. As of April 30th, traders have sold 2,870,000 shares of INSP short. Learn More on Inspire Medical Systems' 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. INSP shares currently have a short interest ratio of 6.0. Learn More on Inspire Medical Systems's short interest ratio.

As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Inspire Medical Systems: Jane Street Group LLC, Millennium Management LLC, Cubist Systematic Strategies LLC, Caption Management LLC, Twin Tree Management LP, PEAK6 LLC, Walleye Trading LLC, Walleye Capital LLC, Arrowpoint Investment Partners Singapore Pte. Ltd., and Berger Financial Group Inc. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission.

Inspire Medical Systems saw a increase in short interest in the month of April. As of April 30th, there was short interest totaling 2,870,000 shares, an increase of 8.3% from the previous total of 2,650,000 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.

Here is how the short interest of companies in the industry of "medical equipment" compare to Inspire Medical Systems: Solventum Co. (2.98%), Smith & Nephew plc (0.35%), Penumbra, Inc. (3.98%), Stevanato Group S.p.A. (6.33%), Glaukos Co. (5.90%), Inari Medical, Inc. (4.24%), iRhythm Technologies, Inc. (9.37%), Bausch + Lomb Co. (5.09%), TransMedics Group, Inc. (26.02%), Soleno Therapeutics, Inc. (10.40%),

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.

Short selling INSP is an investing strategy that aims to generate trading profit from Inspire Medical Systems as its price is falling. INSP shares are trading up $0.20 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 Inspire Medical Systems 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 INSP, 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 INSP, twice per month. The most recent reporting period available is April, 30 2025.