Cytek Biosciences (CTKB) Short Interest Ratio & Short Volume $3.90 +0.00 (+0.10%) As of 02:55 PM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Cytek Biosciences Short Interest DataCytek Biosciences (CTKB) has a short interest of 5.72 million shares, representing 4.95% of the float (the number of shares available for trading by the public). This marks a 0.70% increase in short interest from the previous month. The short interest ratio (days to cover) is 5.4, indicating that it would take 5.4 days of the average trading volume of 996,409 shares to cover all short positions.Current Short Interest5,720,000 sharesPrevious Short Interest5,680,000 sharesChange Vs. Previous Month+0.70%Dollar Volume Sold Short$22.65 millionShort Interest Ratio5.4 Days to CoverLast Record DateSeptember 15, 2025Outstanding Shares127,224,000 sharesFloat Size115,560,000 sharesShort Percent of Float4.95%Today's Trading Volume157,706 sharesAverage Trading Volume996,409 sharesToday's Volume Vs. Average16% Short Selling Cytek Biosciences? Sign up to receive the latest short interest report for Cytek Biosciences 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. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartCTKB Short Interest Over TimeCTKB Days to Cover Over TimeCTKB Percentage of Float Shorted Over Time Cytek Biosciences Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 9/15/20255,720,000 shares $22.65 million +0.7%5.0%5.4 $3.96 8/31/20255,680,000 shares $23.52 million +0.2%4.9%5 $4.14 8/15/20255,670,000 shares $22.74 million +11.2%4.9%4.5 $4.01 7/31/20255,100,000 shares $18.36 million -9.7%4.4%3.9 $3.60 7/15/20255,650,000 shares $18.36 million +19.2%4.9%5 $3.25 6/30/20254,740,000 shares $16.12 million -6.9%4.1%4.1 $3.40 6/15/20255,090,000 shares $16.39 million -5.9%4.4%4.6 $3.22 5/31/20255,410,000 shares $15.04 million +16.3%4.7%5.2 $2.78 5/15/20254,650,000 shares $12.46 million +11.0%4.1%5.2 $2.68 4/30/20254,190,000 shares $15.54 million +1.2%3.7%5.1 $3.71 Get the Latest News and Ratings for CTKB and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Cytek Biosciences and its competitors with MarketBeat's FREE daily newsletter. 4/15/20254,140,000 shares $15.40 million -8.6%3.6%5 $3.72 3/31/20254,530,000 shares $18.17 million +18.9%3.9%5.2 $4.01 3/15/20253,810,000 shares $16.00 million +10.4%3.3%4.6 $4.20 2/28/20253,450,000 shares $15.49 million -0.3%3.0%4.7 $4.49 2/15/20253,460,000 shares $18.10 million +9.2%3.0%5 $5.23 1/31/20253,170,000 shares $16.33 million -8.7%2.7%4 $5.15 1/15/20253,470,000 shares $19.71 million -0.3%3.0%4.7 $5.68 12/31/20243,480,000 shares $22.59 million -5.7%3.0%5.3 $6.49 12/15/20243,690,000 shares $22.91 million -6.6%3.2%5.6 $6.21 11/30/20243,950,000 shares $25.79 million -3.9%3.4%5.6 $6.53 11/15/20244,110,000 shares $24.45 million -2.1%3.5%6 $5.95 10/31/20244,200,000 shares $20.79 million -6.0%3.6%6.2 $4.95 10/15/20244,470,000 shares $23.87 million +4.0%3.7%7.4 $5.34 9/30/20244,300,000 shares $23.82 million +5.4%3.6%6.8 $5.54 9/15/20244,080,000 shares $20.03 million -11.5%3.4%5.7 $4.91 8/31/20244,610,000 shares $26.46 million +0.7%3.9%6.8 $5.74 8/15/20244,580,000 shares $24.78 million -16.3%3.8%7 $5.41 7/31/20245,470,000 shares $36.70 million -13.7%4.6%8 $6.71 7/15/20246,340,000 shares $40.13 million -1.7%5.3%9.6 $6.33 6/30/20246,450,000 shares $35.99 million -0.2%5.4%9.4 $5.58 6/15/20246,460,000 shares $36.31 million -0.2%5.4%9.9 $5.62 5/31/20246,470,000 shares $36.43 million -1.7%5.4%9.3 $5.63 5/15/20246,580,000 shares $40.14 million -16.2%5.5%9 $6.10 4/30/20247,850,000 shares $47.18 million +5.1%6.6%11.2 $6.01 4/15/20247,470,000 shares $44.97 million -24.9%6.3%10.8 $6.02 3/31/20249,950,000 shares $66.76 million +16.9%8.4%13.8 $6.71 3/15/20248,510,000 shares $59.14 million +9.2%7.1%11.6 $6.95 2/29/20247,790,000 shares $59.98 million +4.6%6.3%10.2 $7.70 2/15/20247,450,000 shares $64.96 million -2.5%6.3%9.1 $8.72 1/31/20247,640,000 shares $57.68 million No Change6.6%8.1 $7.55 1/15/20247,640,000 shares $62.72 million +5.2%6.6%7.1 $8.21 12/31/20237,260,000 shares $66.21 million -5.2%6.3%6.5 $9.12 12/15/20237,660,000 shares $69.55 million -3.8%6.6%7.1 $9.08 11/30/20237,960,000 shares $55.24 million -5.0%6.9%7.2 $6.94 11/15/20238,380,000 shares $47.85 million +5.8%7.2%7.8 $5.71 10/31/20237,920,000 shares $33.34 million +0.6%6.8%8.1 $4.21 10/15/20237,870,000 shares $39.51 million -2.8%6.7%8.9 $5.02 9/30/20238,100,000 shares $44.71 million -31.8%6.9%9.5 $5.52 9/15/202311,880,000 shares $83.16 million +0.5%10.4%14.2 $7.00 8/31/202311,820,000 shares $89.83 million +2.7%10.3%14.8 $7.60 8/15/202311,510,000 shares $100.25 million -4.2%10.1%15.2 $8.71 7/31/202312,020,000 shares $107.70 million +4.9%11.0%12.3 $8.96 7/15/202311,460,000 shares $103.25 million +9.4%10.5%8.3 $9.01 6/30/202310,480,000 shares $89.50 million +11.4%9.6%7.6 $8.54 6/15/20239,410,000 shares $81.68 million +8.4%8.6%6.8 $8.68 5/31/20238,680,000 shares $67.79 million -22.6%8.0%6.5 $7.81 5/15/202311,210,000 shares $81.61 million +66.1%10.3%8.3 $7.28 4/30/20236,750,000 shares $77.49 million +3.7%7.2%6.2 $11.48 4/15/20236,510,000 shares $66.27 million +15.2%6.0%9.6 $10.18 3/31/20235,650,000 shares $51.92 million -2.4%5.2%8.2 $9.19 3/15/20235,790,000 shares $56.16 million +1.1%5.3%8.3 $9.70 2/28/20235,730,000 shares $59.02 million +4.4%5.3%8.8 $10.30 2/15/20235,490,000 shares $65.50 million +7.7%5.2%8.8 $11.93 1/31/20235,100,000 shares $61.46 million +28.5%5.6%8.3 $12.05 1/15/20233,970,000 shares $43.63 million +9.7%4.3%6.6 $10.99 12/30/20223,620,000 shares $36.96 million +4.3%4.3%6.5 $10.21 12/15/20223,470,000 shares $37.44 million +20.9%4.1%5.9 $10.79 11/30/20222,870,000 shares $36.99 million +3.6%3.4%4.4 $12.89 11/15/20222,770,000 shares $40.86 million -14.8%3.3%4.1 $14.75 10/31/20223,250,000 shares $50.44 million -13.8%4.4%4.8 $15.52 10/15/20223,770,000 shares $54.25 million -9.4%5.0%5.6 $14.39 9/30/20224,160,000 shares $61.24 million +51.3%5.6%6.2 $14.72 9/15/20222,750,000 shares $38.20 million +3.8%3.7%4 $13.89 8/31/20222,650,000 shares $30.87 million -4.0%3.6%4.3 $11.65 8/15/20222,760,000 shares $41.32 million -12.1%3.7%4 $14.97 7/31/20223,140,000 shares $40.19 million -2.2%4.2%4.2 $12.80 7/15/20223,210,000 shares $38.62 million -10.1%4.0%4.2 $12.03 6/30/20223,570,000 shares $38.31 million -9.6%4.5%4.7 $10.73 6/15/20223,950,000 shares $38.99 million -4.8%4.9%5 $9.87 5/31/20224,150,000 shares $40.30 million -7.8%5.2%3.8 $9.71 5/15/20224,500,000 shares $42.21 million +22.0%5.6%3.8 $9.38 4/30/20223,690,000 shares $34.87 million -4.9%4.9%3 $9.45 4/15/20223,880,000 shares $40.24 million -6.7%5.1%3.2 $10.37 3/31/20224,160,000 shares $44.84 million +321.4%5.5%3.6 $10.78 3/15/2022987,100 shares $12.03 million +9.5%1.3%0.9 $12.19 2/28/2022901,700 shares $12.30 million +44.7%1.2%1.3 $13.64 2/15/2022623,300 shares $9.35 million -30.0%0.8%1.2 $15.00 1/31/2022890,500 shares $12.97 million -12.7%1.2%2.9 $14.56 1/15/20221,020,000 shares $14.01 million +7.4%1.4%5.1 $13.74 12/31/2021949,900 shares $15.50 million +42.0%1.3%5.2 $16.32 12/15/2021669,000 shares $12.27 million +15.7%0.9%3.4 $18.34 11/30/2021578,100 shares $11.66 million -16.8%0.8%2.4 $20.17 11/15/2021695,100 shares $16.10 million -7.3%0.9%2.7 $23.16 10/29/2021749,600 shares $17.10 million -3.2%0.9%2.9 $22.81 10/15/2021774,200 shares $18.63 million +31.6%1.0%2.6 $24.07 9/30/2021588,500 shares $12.60 million +206.2%0.7%1.5 $21.41 9/15/2021192,200 shares $5.37 million +330.0%0.2%0.5 $27.93 8/31/202144,700 shares $1.02 million -51.2%0.2%0.1 $22.78 8/13/202191,600 shares $1.89 million No Change0.1%0.2 $20.67 CTKB Short Interest - Frequently Asked Questions What is Cytek Biosciences' current short interest? Short interest is the volume of Cytek Biosciences shares that have been sold short but have not yet been closed out or covered. As of September 15th, traders have sold 5,720,000 shares of CTKB short. 4.95% of Cytek Biosciences' shares are currently sold short. Learn More on Cytek Biosciences' current short interest. What is a good short interest ratio for Cytek Biosciences? 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. CTKB shares currently have a short interest ratio of 5.0. Learn More on Cytek Biosciences's short interest ratio. What is a good short interest percentage for Cytek Biosciences? 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. 4.95% of Cytek Biosciences' floating shares are currently sold short. Is Cytek Biosciences' short interest increasing or decreasing? Cytek Biosciences saw a increase in short interest in September. As of September 15th, there was short interest totaling 5,720,000 shares, an increase of 0.7% from the previous total of 5,680,000 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 Cytek Biosciences' float size? Cytek Biosciences currently has issued a total of 127,224,000 shares. Some of Cytek Biosciences' 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. Cytek Biosciences currently has a public float of 115,560,000 shares. How does Cytek Biosciences' short interest compare to its competitors? 4.95% of Cytek Biosciences' shares are currently sold short. Here is how the short interest of companies in the industry of "measuring and control equipment" compare to Cytek Biosciences: 10x Genomics (13.94%), Eyepoint Pharmaceuticals, Inc. (12.90%), Aehr Test Systems (18.79%), Allient Inc. (2.39%), Transcat, Inc. (4.83%), Standard BioTools Inc. (3.28%), Senseonics Holdings, Inc. (6.07%), Quantum-Si Incorporated (14.11%), Frequency Electronics, Inc. (9.89%), 908 Devices Inc. (7.12%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: AppLovin Corporation ($8.81 billion), Canadian Natural Resources Limited ($5.82 billion), Reddit Inc. ($5.19 billion), Coinbase Global, Inc. ($4.52 billion), Robinhood Markets, Inc. ($4.30 billion), Charter Communications, Inc. ($3.75 billion), CoreWeave Inc. ($3.66 billion), Seagate Technology Holdings PLC ($3.57 billion), Live Nation Entertainment, Inc. ($3.33 billion), and Rocket Lab Corporation ($3.26 billion). View all of the most shorted stocks. What does it mean to sell short Cytek Biosciences stock? Short selling CTKB is an investing strategy that aims to generate trading profit from Cytek Biosciences as its price is falling. CTKB shares are trading down $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 Cytek Biosciences? A short squeeze for Cytek Biosciences 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 CTKB, which in turn drives the price of the stock up even further. How often is Cytek Biosciences' 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 CTKB, twice per month. The most recent reporting period available is September, 15 2025. More Short Interest Resources from MarketBeat Related Companies 10x Genomics Short Interest Eyepoint Pharmaceuticals Short Interest Aehr Test Systems Short Interest Allient Short Interest Transcat Short Interest Standard BioTools Short Interest Senseonics Short Interest Quantum-Si Short Interest Frequency Electronics Short Interest 908 Devices Short Interest Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:CTKB) was last updated on 10/9/2025 by MarketBeat.com Staff From Our PartnersBitcoin grabs headlines, but smart money likes this tokenBitcoin grabs headlines, but smart money likes this token My research team has identified the token positio...Crypto 101 Media | SponsoredBuilding The Infrastructure for the Coming Financial ResetWhile China pushes nearly $1 trillion through its new digital currency, one emerging company is quietly buildi...Intellistake | SponsoredMagnificent 7 being replaced by the “Hidden 7”?BULLISH: It's time to buy this 'hidden' AI stock An award-winning stock-rating system has turned BULLISH on...Chaikin Analytics | SponsoredCapital Gains Tax Strategies for SeniorsCapital gains taxes can take a bite out of your retirement income—unless you have a smart strategy. 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