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Cytek Biosciences (CTKB) Short Interest Ratio & Short Volume

Cytek Biosciences logo
$4.05 -0.08 (-1.94%)
Closing price 04:00 PM Eastern
Extended Trading
$4.03 -0.02 (-0.49%)
As of 06:42 PM 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 Massive. Learn more.
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Cytek Biosciences Short Interest Overview

As of May 29, 2026, Cytek Biosciences (CTKB) had a short interest of 7.30 million shares sold short, representing 6.31% of the public float. This marks a 6.40% increase in short interest since the prior report. The short interest ratio (days to cover) is 8.1, meaning it would take 8.1 days of the average trading volume of 836,684 shares to cover all short positions.

Current Short Interest
7,304,635 shares
Previous Short Interest
6,864,944 shares
Change Vs. Previous Month
6.40%
Dollar Volume Sold Short
$30.61 million
Short Interest Ratio
8.1 Days to Cover
Last Record Date
May 29, 2026
Outstanding Shares
129,140,000 shares
Short Percent of Float
6.31%
Today's Trading Volume
1,068,961 shares
Average Trading Volume
836,684 shares
Today's Volume Vs. Average
128%
Short Selling Cytek Biosciences?
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

CTKB Short Interest Over Time

CTKB Days to Cover Over Time

CTKB Percentage of Float Shorted Over Time

Cytek Biosciences Tesla Short Interest History & Recent Changes

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Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
5/29/20267,304,635 shares $30.61 million +6.4%6.3%8.14 $4.19
5/15/20266,864,944 shares $23.34 million -11.3%5.9%5.96 $3.40
4/30/20267,740,907 shares $35.30 million -4.4%6.7%12.37 $4.56
11/14/20256,639,767 shares $36.52 million +3.8%5.8%3.57 $5.50
10/31/20256,398,689 shares $24.95 million +2.0%5.6%10.98 $3.90
10/15/20256,280,000 shares $25.50 million -1.0%5.4%6.6 $4.06
9/30/20256,340,000 shares $22.00 million +10.8%5.5%6.5 $3.47
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
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
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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
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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

Short interest is the volume of Cytek Biosciences shares that have been sold short but have not yet been covered or closed out. As of May 29th, traders have sold 7,304,635 shares of CTKB short. 6.31% of Cytek Biosciences' shares are currently sold short. Learn More on Cytek Biosciences' 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. CTKB shares currently have a short interest ratio of 8.1. Learn More on Cytek Biosciences's short interest ratio.

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. 6.31% of Cytek Biosciences' floating shares are currently sold short.

Cytek Biosciences saw a increase in short interest in the month of May. As of May 29th, there was short interest totaling 7,304,635 shares, an increase of 6.4% from the previous total of 6,864,944 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.

6.31% 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: Allient Inc. (5.11%), Alamar Biosciences, Inc. (2.55%), Eyepoint Pharmaceuticals, Inc. (18.98%), Transcat, Inc. (5.78%), Frequency Electronics, Inc. (10.80%), Syntec Optics Holdings, Inc. (3.85%), Standard BioTools Inc. (4.59%), Prenetics Global Limited (4.99%), Nautilus Biotechnology, Inc. (1.02%), 908 Devices Inc. (11.69%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($81.27 billion), Invesco QQQ ($49.06 billion), iShares Russell 2000 ETF ($23.61 billion), Western Digital Corporation ($16.93 billion), Sandisk Corporation ($15.61 billion), Salesforce Inc. ($11.65 billion), SPDR S&P Biotech ETF ($10.52 billion), Nebius Group N.V. ($10.24 billion), Lumentum Holdings Inc. ($8.74 billion), and iShares iBoxx $ High Yield Corporate Bond ETF ($8.21 billion). View all of the most shorted stocks.

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 $0.08 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 Cytek Biosciences 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 CTKB, 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 CTKB, twice per month. The most recent reporting period available is May, 29 2026.

Understanding short interest metrics can help you assess how traders are positioning around a stock like CTKB:

  • Shares Sold Short: The total number of shares that have been sold by short sellers but have not yet been covered or closed out. A high number may indicate bearish sentiment.
  • Short Float: The percentage of a company’s publicly available shares (or "float") that are sold short. A higher short float suggests a greater portion of the stock is being bet against.
  • Days to Cover (Short Interest Ratio): This estimates how many days it would take short sellers to cover their positions, based on average daily trading volume. Higher values can signal potential for a short squeeze if buying pressure increases.

These metrics are often used by traders to gauge sentiment, volatility risk, and the potential for price movements based on short covering activity.


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This page (NASDAQ:CTKB) was last updated on 6/10/2026 by MarketBeat.com Staff.
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