Personalis (PSNL) Short Interest Ratio & Short Volume $4.70 +0.01 (+0.21%) Closing price 05/28/2025 04:00 PM EasternExtended Trading$4.74 +0.04 (+0.74%) As of 04:22 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 ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Personalis Short Interest DataPersonalis (PSNL) has a short interest of 4.25 million shares, representing 10.65% of the float (the number of shares available for trading by the public). This marks a 10.10% increase in short interest from the previous month. The short interest ratio (days to cover) is 5.0, indicating that it would take 5.0 days of the average trading volume of 1.01 million shares to cover all short positions.Current Short Interest4,250,000 sharesPrevious Short Interest3,860,000 sharesChange Vs. Previous Month+10.10%Dollar Volume Sold Short$20.78 millionShort Interest Ratio5.0 Days to CoverLast Record DateMay 15, 2025Outstanding Shares88,325,000 sharesFloat Size39,890,000 sharesShort Percent of Float10.65%Today's Trading Volume617,710 sharesAverage Trading Volume1,011,480 sharesToday's Volume Vs. Average61% Short Selling Personalis? Sign up to receive the latest short interest report for Personalis and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartPSNL Short Interest Over TimePSNL Days to Cover Over TimePSNL Percentage of Float Shorted Over Time Personalis Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 5/15/20254,250,000 shares $20.78 million +10.1%10.7%5 $4.89 4/30/20253,860,000 shares $14.59 million -12.5%N/A4.1 $3.78 4/15/20254,410,000 shares $14.38 million +1.6%6.5%4.4 $3.26 3/31/20254,340,000 shares $15.23 million No Change6.4%4.1 $3.51 3/15/20254,340,000 shares $15.75 million +14.8%6.4%3.4 $3.63 2/28/20253,780,000 shares $15.65 million -2.6%5.6%3 $4.14 2/15/20253,880,000 shares $21.38 million +9.9%11.0%3.4 $5.51 1/31/20253,530,000 shares $18.43 million +0.6%10.0%3.1 $5.22 1/15/20253,510,000 shares $18.15 million +6.0%9.9%3.3 $5.17 12/31/20243,310,000 shares $19.13 million +11.5%9.4%3.5 $5.78 Get the Latest News and Ratings for PSNL and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Personalis and its competitors with MarketBeat's FREE daily newsletter. 12/15/20242,970,000 shares $11.35 million -1.7%N/A3.4 $3.82 11/30/20243,020,000 shares $11.99 million +6.0%7.2%4.1 $3.97 11/15/20242,850,000 shares $11.09 million -12.0%6.8%3.6 $3.89 10/31/20243,240,000 shares $16.36 million +3.9%7.7%3.1 $5.05 10/15/20243,120,000 shares $15.19 million +6.1%9.9%3 $4.87 9/30/20242,940,000 shares $15.82 million +29.5%9.3%2 $5.38 9/15/20242,270,000 shares $12.92 million No Change7.2%1.5 $5.69 8/31/20242,270,000 shares $12.35 million +14.7%7.3%1.7 $5.44 8/15/20241,980,000 shares $10.04 million +9.4%6.4%1.6 $5.07 7/31/20241,810,000 shares $6.24 million +19.9%N/A2 $3.45 7/15/20241,510,000 shares $2.43 million +6.3%3.5%2 $1.61 6/30/20241,420,000 shares $1.66 million No Change3.3%5.3 $1.17 6/15/20241,420,000 shares $1.93 million +11.8%3.3%6.3 $1.36 5/31/20241,270,000 shares $1.65 million +7.6%3.0%5.1 $1.30 5/15/20241,180,000 shares $1.69 million -6.4%2.7%4 $1.43 4/30/20241,260,000 shares $1.85 million +17.8%3.0%4 $1.47 4/15/20241,070,000 shares $1.35 million -0.9%2.6%3.1 $1.26 3/31/20241,080,000 shares $1.61 million +1.9%2.6%2.8 $1.49 3/15/20241,060,000 shares $1.71 million +16.0%2.6%2.2 $1.61 2/29/2024914,000 shares $1.42 million -2.6%2.3%1.8 $1.55 2/15/2024938,100 shares $1.24 million +13.5%2.4%1.8 $1.32 1/31/2024826,700 shares $1.11 million -8.1%2.1%1.2 $1.34 1/15/2024899,700 shares $1.57 million +10.8%2.3%1.4 $1.74 12/31/2023811,700 shares $1.70 million +1.9%2.1%1.3 $2.10 12/15/2023796,400 shares $1.20 million -3.5%2.0%1.5 $1.51 11/30/2023825,500 shares $1.26 million -8.2%2.1%1.8 $1.53 11/15/2023899,600 shares $998,556.00 +20.9%2.3%2.2 $1.11 10/31/2023743,900 shares $715,780.58 -3.6%1.9%3.4 $0.96 10/15/2023771,400 shares $817,684.00 -22.4%2.0%4.1 $1.06 9/30/2023993,800 shares $1.20 million -2.6%2.5%5.5 $1.21A grave, grave error. (Ad)I thought what happened 25 years ago was a once- in-a-lifetime event… but how wrong I was. Because here we are, a quarter of a century later, almost to the exact day, and it’s happening again. Here’s the full story for you. 9/15/20231,020,000 shares $1.43 million -8.1%2.6%5.3 $1.40 8/31/20231,110,000 shares $2.02 million -19.6%2.9%5.8 $1.82 8/15/20231,380,000 shares $2.50 million +0.7%3.6%6.5 $1.81 7/31/20231,370,000 shares $3.23 million -3.5%3.7%5.9 $2.36 7/15/20231,420,000 shares $2.87 million +5.2%3.8%5.2 $2.02 6/30/20231,350,000 shares $2.54 million +7.1%3.6%4.7 $1.88 6/15/20231,260,000 shares $2.71 million -9.4%3.4%4.3 $2.15 5/31/20231,390,000 shares $2.50 million -6.7%3.7%4.3 $1.80 5/15/20231,490,000 shares $3.28 million -2.6%4.0%4.2 $2.20 4/30/20231,530,000 shares $3.49 million -3.8%4.1%3.7 $2.28 4/15/20231,590,000 shares $4.87 million -3.6%4.3%3.1 $3.06 3/31/20231,650,000 shares $4.55 million -14.5%4.5%3.2 $2.76 3/15/20231,930,000 shares $5.33 million +5.5%5.2%3.4 $2.76 2/28/20231,830,000 shares $5.51 million +8.9%5.0%3.2 $3.01 2/15/20231,680,000 shares $5.86 million +4.4%4.6%3.1 $3.49 1/31/20231,610,000 shares $3.78 million -5.3%4.4%3 $2.35 1/15/20231,700,000 shares $4.88 million +32.8%4.7%4.5 $2.87 12/30/20221,280,000 shares $2.53 million -0.8%3.5%3.3 $1.98 12/15/20221,290,000 shares $2.97 million -3.7%3.5%3.4 $2.30 11/30/20221,340,000 shares $3.40 million -0.7%3.7%3.6 $2.54 11/15/20221,350,000 shares $3.79 million -2.2%3.7%3.6 $2.81 10/31/20221,380,000 shares $3.68 million +2.2%3.8%3.5 $2.67 10/15/20221,350,000 shares $3.27 million +0.8%3.7%3.1 $2.42 9/30/20221,340,000 shares $3.98 million -2.2%3.7%3.1 $2.97 9/15/20221,370,000 shares $5.33 million +4.6%3.8%2.6 $3.89 8/31/20221,310,000 shares $4.34 million +5.7%3.6%2.3 $3.31 8/15/20221,240,000 shares $6.60 million +0.8%3.4%2 $5.32 7/31/20221,230,000 shares $4.54 million -12.1%3.4%1.9 $3.69 7/15/20221,400,000 shares $5.67 million +23.9%3.9%2.2 $4.05 6/30/20221,130,000 shares $3.90 million -44.9%3.1%1.8 $3.45 6/15/20222,050,000 shares $6.97 million -12.0%5.7%3.3 $3.40 5/31/20222,330,000 shares $9.23 million +8.9%6.5%4.5 $3.96 5/15/20222,140,000 shares $10.74 million +16.9%5.9%4.5 $5.02 4/30/20221,830,000 shares $10.25 million +15.8%5.1%4.2 $5.60 4/15/20221,580,000 shares $10.90 million -10.2%4.4%3.6 $6.90 3/31/20221,760,000 shares $14.41 million -3.3%4.9%3.9 $8.19 3/15/20221,820,000 shares $13.76 million -5.2%5.1%3.8 $7.56 2/28/20221,920,000 shares $20.16 million -2.5%5.3%3.9 $10.50 2/15/20221,970,000 shares $22.32 million -3.9%5.5%4 $11.33 1/31/20222,050,000 shares $23.35 million +4.1%5.7%4.2 $11.39 1/15/20221,970,000 shares $24.13 million +11.9%5.5%4.2 $12.25 12/31/20211,760,000 shares $25.12 million -9.3%N/A4 $14.27 12/15/20211,940,000 shares $26.77 million +9.0%5.4%4.5 $13.80 11/30/20211,780,000 shares $24.12 million +29.0%5.0%4.3 $13.55 11/15/20211,380,000 shares $23.74 million -6.8%3.9%3.7 $17.20 10/29/20211,480,000 shares $29.04 million -3.3%4.1%4.1 $19.62 10/15/20211,530,000 shares $30.51 million -16.4%4.3%4.3 $19.94 9/30/20211,830,000 shares $35.21 million -4.2%5.2%5 $19.24 9/15/20211,910,000 shares $40.87 million -1.6%5.4%4.8 $21.40 8/31/20211,940,000 shares $41.09 million -13.0%5.5%4.7 $21.18A grave, grave error. (Ad)I thought what happened 25 years ago was a once- in-a-lifetime event… but how wrong I was. Because here we are, a quarter of a century later, almost to the exact day, and it’s happening again. Here’s the full story for you. 8/13/20212,230,000 shares $40.76 million +2.8%6.3%5.1 $18.28 7/30/20212,170,000 shares $45.55 million +8.0%6.2%4.1 $20.99 7/15/20212,010,000 shares $42.21 million -3.4%5.8%3.4 $21.00 6/30/20212,080,000 shares $52.62 million -13.7%6.0%3.3 $25.30 6/15/20212,410,000 shares $55.14 million -6.2%6.9%3.4 $22.88 5/28/20212,570,000 shares $57.80 million -2.3%7.4%3.4 $22.49 5/14/20212,630,000 shares $47.73 million -14.1%N/A3 $18.15 4/30/20213,060,000 shares $74.91 million -0.7%N/A3.3 $24.48 4/15/20213,080,000 shares $71.12 million -4.6%N/A3.1 $23.09 3/31/20213,230,000 shares $73.68 million +5.6%N/A3 $22.81 3/15/20213,060,000 shares $82.68 million +34.2%N/A2.8 $27.02 2/26/20212,280,000 shares $72.23 million +14.0%N/A2.1 $31.68 2/12/20212,000,000 shares $76.66 million +9.9%N/A1.9 $38.33 1/29/20211,820,000 shares $73.40 million -25.7%6.3%1.7 $40.33 1/15/20212,450,000 shares $105.47 million +23.7%9.4%2.5 $43.05 12/31/20201,980,000 shares $75.04 million +42.5%8.4%2.3 $37.90 12/15/20201,390,000 shares $48.15 million +3.7%5.9%1.8 $34.64 11/30/20201,340,000 shares $37.21 million +3.1%5.7%1.8 $27.77 11/15/20201,300,000 shares $37.78 million -22.2%5.5%1.8 $29.06 10/30/20201,670,000 shares $43.79 million +14.4%7.1%2.4 $26.22 10/15/20201,460,000 shares $38.47 million -10.4%6.3%2.3 $26.35 9/30/20201,630,000 shares $35.32 million +88.1%7.2%2.7 $21.67 9/15/2020866,400 shares $19.29 million -8.6%3.9%1.7 $22.27 8/31/2020947,700 shares $21.63 million +1.0%4.2%2.1 $22.82 8/14/2020937,900 shares $18.92 million -4.0%4.9%2.3 $20.17 7/31/2020977,100 shares $17.01 million -5.1%6.1%3.2 $17.41 7/15/20201,030,000 shares $17.43 million +3.9%6.4%3.6 $16.92 6/30/2020991,400 shares $12.86 million +17.9%6.2%3.4 $12.97 6/15/2020841,100 shares $10.44 million -6.1%5.3%2.7 $12.41 5/29/2020895,500 shares $10.60 million -15.5%5.7%2.5 $11.84 PSNL Short Interest - Frequently Asked Questions What is Personalis' current short interest? Short interest is the volume of Personalis shares that have been sold short but have not yet been closed out or covered. As of May 15th, traders have sold 4,250,000 shares of PSNL short. 10.65% of Personalis' shares are currently sold short. Learn More on Personalis' current short interest. What is a good short interest ratio for Personalis? 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. PSNL shares currently have a short interest ratio of 5.0. Learn More on Personalis's short interest ratio. What is a good short interest percentage for Personalis? 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. 10.65% of Personalis' floating shares are currently sold short. Is Personalis' short interest increasing or decreasing? Personalis saw a increase in short interest during the month of May. As of May 15th, there was short interest totaling 4,250,000 shares, an increase of 10.1% from the previous total of 3,860,000 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. What is Personalis' float size? Personalis currently has issued a total of 88,325,000 shares. Some of Personalis' 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. Personalis currently has a public float of 39,890,000 shares. How does Personalis' short interest compare to its competitors? 10.65% of Personalis' shares are currently sold short. Here is how the short interest of companies in the industry of "healthcare" compare to Personalis: PACS Group, Inc. (6.88%), Grail, Inc. (20.83%), Teladoc Health, Inc. (12.67%), AdaptHealth Corp. (11.22%), Aveanna Healthcare Holdings Inc. (3.29%), Viridian Therapeutics, Inc. (13.41%), The Pennant Group, Inc. (1.87%), CareDx, Inc (12.62%), agilon health, inc. (7.33%), Fulgent Genetics, Inc. (9.04%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Invesco QQQ ($29.20 billion), Strategy Incorporated ($10.88 billion), iShares 20+ Year Treasury Bond ETF ($10.04 billion), Capital One Financial Co. ($5.51 billion), Charter Communications, Inc. ($5.00 billion), Super Micro Computer, Inc. ($4.43 billion), Apollo Global Management, Inc. ($4.02 billion), Hims & Hers Health, Inc. ($3.65 billion), VanEck Semiconductor ETF ($3.27 billion), and Coinbase Global, Inc. ($3.10 billion). View all of the most shorted stocks. What does it mean to sell short Personalis stock? Short selling PSNL is an investing strategy that aims to generate trading profit from Personalis as its price is falling. PSNL shares are trading up $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 Personalis? A short squeeze for Personalis 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 PSNL, which in turn drives the price of the stock up even further. How often is Personalis' 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 PSNL, twice per month. The most recent reporting period available is May, 15 2025. More Short Interest Resources from MarketBeat Related Companies PACS Group Short Squeeze Grail Short Squeeze Teladoc Health Short Squeeze AdaptHealth Short Squeeze Aveanna Healthcare Short Squeeze Viridian Therapeutics Short Squeeze The Pennant Group Short Squeeze CareDx Short Squeeze agilon health Short Squeeze Fulgent Genetics Short Squeeze Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:PSNL) was last updated on 5/29/2025 by MarketBeat.com Staff From Our PartnersMarket Panic: Trump Just Dropped a Bomb on Your Stockstock Market Panic: Trump Just Dropped a Bomb on Your Stocks The market is in freefall—and Trump's new tarif...American Alternative | SponsoredWhite House to reset Social Security?Elon Musk's parting DOGE gift looks set to shock America... 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