Zai Lab (ZLAB) Short Interest Ratio & Short Volume $31.69 -0.15 (-0.47%) As of 04/30/2025 04:00 PM Eastern Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Zai Lab Short Interest DataZai Lab (ZLAB) has a short interest of 7.77 million shares, representing 8.24% of the float (the number of shares available for trading by the public). This marks a 6.15% increase in short interest from the previous month. The short interest ratio (days to cover) is 6.6, indicating that it would take 6.6 days of the average trading volume of 856,222 shares to cover all short positions.Current Short Interest7,770,000 sharesPrevious Short Interest7,320,000 sharesChange Vs. Previous Month+6.15%Dollar Volume Sold Short$236.05 millionShort Interest Ratio6.6 Days to CoverLast Record DateApril 15, 2025Outstanding Shares110,128,000 sharesShort Percent of Float8.24%Today's Trading Volume919,800 sharesAverage Trading Volume856,222 sharesToday's Volume Vs. Average107% Short Selling Zai Lab? Sign up to receive the latest short interest report for Zai Lab and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartZLAB Short Interest Over TimeZLAB Days to Cover Over TimeZLAB Percentage of Float Shorted Over Time Zai Lab Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 4/15/20257,770,000 shares $236.05 million +6.2%8.2%6.6 $30.38 3/31/20257,320,000 shares $264.54 million -7.6%7.8%7.2 $36.14 3/15/20257,920,000 shares $302.54 million +1.2%8.4%9.9 $38.20 2/28/20257,830,000 shares $271.23 million +3.3%8.3%9.6 $34.64 2/15/20257,580,000 shares $219.82 million -1.7%8.0%9.5 $29.00 1/31/20257,710,000 shares $209.63 million +27.4%N/A9.5 $27.19 1/15/20256,050,000 shares $148.83 million +1.9%N/A6.7 $24.60 12/31/20245,940,000 shares $155.57 million +1.5%N/A6.4 $26.19 12/15/20245,850,000 shares $154.03 million +13.2%N/A6 $26.33 11/30/20245,170,000 shares $149.15 million +5.7%N/A5.4 $28.85 Get the Latest News and Ratings for ZLAB and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Zai Lab and its competitors with MarketBeat's FREE daily newsletter. 11/15/20244,890,000 shares $132.32 million +4.9%N/A5.1 $27.06 10/31/20244,660,000 shares $140.83 million -1.9%N/A6.2 $30.22 10/15/20244,750,000 shares $117.75 million -2.3%N/A6.4 $24.79 9/30/20244,860,000 shares $117.32 million -10.3%N/A7.4 $24.14 9/15/20245,420,000 shares $111.16 million +9.9%N/A9.5 $20.51 8/31/20244,930,000 shares $98.30 million +4.7%N/A8.7 $19.94 8/15/20244,710,000 shares $78.42 million +13.2%N/A8.5 $16.65 7/31/20244,160,000 shares $79.16 million +40.5%N/A6.4 $19.03 7/15/20242,960,000 shares $53.28 million +5.0%N/A4.9 $18.00 6/30/20242,820,000 shares $48.87 million +1.1%N/A4.8 $17.33 6/15/20242,790,000 shares $52.15 million +3.0%N/A4.5 $18.69 5/31/20242,710,000 shares $48.18 million -17.4%N/A4.2 $17.78 5/15/20243,280,000 shares $68.39 million -24.8%N/A5.1 $20.85 4/30/20244,360,000 shares $68.89 million +6.9%N/A6.4 $15.80 4/15/20244,080,000 shares $57.94 million +5.4%N/A6.3 $14.20 3/31/20243,870,000 shares $62.00 million +5.7%N/A5.8 $16.02 3/15/20243,660,000 shares $67.60 million -9.9%N/A5.5 $18.47 2/29/20244,060,000 shares $85.18 million -13.4%N/A6.1 $20.98 2/15/20244,690,000 shares $93.28 million -4.3%N/A7.4 $19.89 1/31/20244,900,000 shares $105.69 million +2.3%N/A8.5 $21.57 1/15/20244,790,000 shares $117.93 million +14.1%N/A9.1 $24.62 12/31/20234,200,000 shares $114.79 million +3.5%N/A8.7 $27.33 12/15/20234,060,000 shares $121.76 million +5.2%N/A8.7 $29.99 11/30/20233,860,000 shares $105.34 million -4.7%N/A9.6 $27.29 11/15/20234,050,000 shares $112.10 million +7.4%N/A9.5 $27.68 10/31/20233,770,000 shares $95.00 million +23.2%N/A8.7 $25.20 10/15/20233,060,000 shares $77.17 million -5.6%N/A7.4 $25.22 9/30/20233,240,000 shares $78.76 million -3.6%N/A7.6 $24.31 9/15/20233,360,000 shares $86.55 million +2.4%N/A7.8 $25.76 8/31/20233,280,000 shares $83.54 million +4.1%N/A6.6 $25.47Musk's warning signal: Prepare before the cascade begins (Ad)When Elon Musk triggered his AI layoff plan, most analysts missed what it really meant. Louis Navellier didn’t. With 40+ years of market modeling, he says Musk’s move wasn’t about efficiency — it was a signal. And what’s coming next could divide the market into winners and losers faster than anyone expects. Watch this urgent video briefing now.Watch the Musk market warning before the dominoes fall 8/15/20233,150,000 shares $77.24 million +3.3%N/A5.5 $24.52 7/31/20233,050,000 shares $91.68 million +3.4%N/A5.1 $30.06 7/15/20232,950,000 shares $82.16 million +0.3%N/A5 $27.85 6/30/20232,940,000 shares $81.53 million -6.1%N/A5 $27.73 6/15/20233,130,000 shares $89.11 million -4.3%N/A5.1 $28.47 5/31/20233,270,000 shares $106.24 million No ChangeN/A5.1 $32.49 5/15/20233,270,000 shares $110.04 million -1.8%N/A5.7 $33.65 4/30/20233,330,000 shares $116.48 million +1.2%N/A6.1 $34.98 4/15/20233,290,000 shares $126.73 million -3.8%N/A5.7 $38.52 3/31/20233,420,000 shares $113.75 million +4.9%N/A5.2 $33.26 3/15/20233,260,000 shares $104.32 million +12.4%N/A4.2 $32.00 2/28/20232,900,000 shares $107.74 million -0.7%N/A4.2 $37.15 2/15/20232,920,000 shares $108.51 million +1.0%N/A4.4 $37.16 1/31/20232,890,000 shares $121.78 million +6.3%N/A4.1 $42.14 1/15/20232,720,000 shares $129.53 million +1.1%N/A3.6 $47.62 12/30/20222,690,000 shares $82.58 million +4.3%N/A3.7 $30.70 12/15/20222,580,000 shares $84.83 million -9.8%N/A4.4 $32.88 11/30/20222,860,000 shares $110.28 million -3.7%N/A4.4 $38.56 11/15/20222,970,000 shares $114.97 million -0.7%N/A4.4 $38.71 10/31/20222,990,000 shares $66.62 million -1.3%N/A4.7 $22.28 10/15/20223,030,000 shares $87.05 million +2.0%N/A5.6 $28.73 9/30/20222,970,000 shares $101.57 million -5.7%N/A5.6 $34.20 9/15/20223,150,000 shares $154.19 million +9.0%N/A5.7 $48.95 8/31/20222,890,000 shares $133.55 million -0.7%N/A5.3 $46.21 8/15/20222,910,000 shares $133.22 million +4.3%N/A5 $45.78 7/31/20222,790,000 shares $113.08 million -6.4%N/A4.3 $40.53 7/15/20222,980,000 shares $116.22 million +12.0%N/A4.5 $39.00 6/30/20222,660,000 shares $92.25 million -11.9%N/A4.2 $34.68 6/15/20223,020,000 shares $74.02 million -6.2%N/A4.7 $24.51 5/31/20223,220,000 shares $93.70 million -2.7%N/A3.7 $29.10 5/15/20223,310,000 shares $109.96 million +4.8%N/A4 $33.22 4/30/20223,160,000 shares $126.27 million +3.6%N/A3.8 $39.96 4/15/20223,050,000 shares $135.45 million -15.3%N/A3.6 $44.41 3/31/20223,600,000 shares $158.33 million +7.1%N/A4 $43.98 3/15/20223,360,000 shares $97.64 million +7.4%3.6%3.9 $29.06 2/28/20223,130,000 shares $171.21 million -5.4%3.3%4.6 $54.70 2/15/20223,310,000 shares $188.54 million -5.7%3.5%5 $56.96 1/31/20223,510,000 shares $174.34 million +8.0%3.7%5.5 $49.67 1/15/20223,250,000 shares $161.79 million +14.4%3.5%5.2 $49.78 12/31/20212,840,000 shares $178.49 million -6.6%3.0%4.7 $62.85 12/15/20213,040,000 shares $166.90 million +8.6%3.2%4.8 $54.90 11/30/20212,800,000 shares $193.90 million -3.1%3.0%4.8 $69.25 11/15/20212,890,000 shares $248.42 million +3.6%3.1%5.5 $85.96 10/29/20212,790,000 shares $291.28 million +0.4%3.0%5.3 $104.40 10/15/20212,780,000 shares $283.56 million -9.2%3.0%4.7 $102.00 9/30/20213,060,000 shares $322.49 million +21.0%3.2%5.3 $105.39 9/15/20212,530,000 shares $315.59 million No Change2.7%4.6 $124.74 8/31/20212,530,000 shares $365.59 million +2.0%2.7%5 $144.50 8/13/20212,480,000 shares $372.60 million -6.4%2.7%4.5 $150.24 7/30/20212,650,000 shares $383.22 million +20.5%2.8%5 $144.61Musk's warning signal: Prepare before the cascade begins (Ad)When Elon Musk triggered his AI layoff plan, most analysts missed what it really meant. Louis Navellier didn’t. With 40+ years of market modeling, he says Musk’s move wasn’t about efficiency — it was a signal. And what’s coming next could divide the market into winners and losers faster than anyone expects. Watch this urgent video briefing now.Watch the Musk market warning before the dominoes fall 7/15/20212,200,000 shares $374.42 million +3.3%2.4%4.7 $170.19 6/30/20212,130,000 shares $376.99 million -17.1%2.4%4.1 $176.99 6/15/20212,570,000 shares $426.88 million -12.9%2.8%4.8 $166.10 5/28/20212,950,000 shares $524.10 million No Change3.3%5.6 $177.66 5/14/20212,950,000 shares $447.46 million +18.0%N/A5.6 $151.68 4/30/20212,500,000 shares $420.65 million +7.3%N/A4.8 $168.26 4/15/20212,330,000 shares $384.05 million +17.1%N/A4.7 $164.83 3/31/20211,990,000 shares $257.51 million +3.7%N/A4.6 $129.40 3/15/20211,920,000 shares $275.88 million +31.5%N/A4.9 $143.69 2/26/20211,460,000 shares $215.19 million -10.4%N/A3.9 $147.39 2/12/20211,630,000 shares $297.20 million +2.5%N/A4.6 $182.33 1/29/20211,590,000 shares $249.38 million -20.1%N/A4.1 $156.84 1/15/20211,990,000 shares $326.22 million -5.7%N/A5.2 $163.93 12/31/20202,110,000 shares $282.97 million -14.2%N/A6.1 $134.11 12/15/20202,460,000 shares $267.60 million -4.3%N/A6.4 $108.78 11/30/20202,570,000 shares $277.92 million +0.8%N/A6.4 $108.14 10/30/20202,710,000 shares $228.21 million -14.2%N/A7.4 $84.21 10/15/20203,160,000 shares $287.56 million -10.2%N/A8.8 $91.00 9/30/20203,520,000 shares $292.76 million +32.3%N/A9.4 $83.17 9/15/20202,660,000 shares $209.61 million +4.7%N/A7.8 $78.80 8/31/20202,540,000 shares $201.60 million -5.2%N/A6.9 $79.37 8/14/20202,680,000 shares $213.14 million -2.2%N/A6.1 $79.53 7/31/20202,740,000 shares $208.54 million -2.8%N/A6 $76.11 7/15/20202,820,000 shares $241.62 million +2.6%N/A6.3 $85.68 6/30/20202,750,000 shares $226.96 million -7.4%N/A6 $82.53 6/15/20202,970,000 shares $204.93 million +21.2%N/A6.7 $69.00 5/29/20202,450,000 shares $167.48 million +21.9%N/A5.6 $68.36 5/15/20202,010,000 shares $141.24 million +5.8%N/A4.4 $70.27 ZLAB Short Interest - Frequently Asked Questions What is Zai Lab's current short interest? Short interest is the volume of Zai Lab shares that have been sold short but have not yet been closed out or covered. As of April 15th, investors have sold 7,770,000 shares of ZLAB short. 8.24% of Zai Lab's shares are currently sold short. Learn More on Zai Lab's current short interest. What is a good short interest ratio for Zai Lab? 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. ZLAB shares currently have a short interest ratio of 7.0. Learn More on Zai Lab's short interest ratio. Which institutional investors are shorting Zai Lab? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Zai Lab: Jefferies Financial Group Inc., Wolverine Trading LLC, Jefferies Financial Group Inc., Group One Trading LLC, Citadel Advisors LLC, Jane Street Group LLC, and Concourse Financial Group Securities Inc.. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Zai Lab? 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. 8.24% of Zai Lab's floating shares are currently sold short. Is Zai Lab's short interest increasing or decreasing? Zai Lab saw a increase in short interest in the month of April. As of April 15th, there was short interest totaling 7,770,000 shares, an increase of 6.1% from the previous total of 7,320,000 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. How does Zai Lab's short interest compare to its competitors? 8.24% of Zai Lab's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Zai Lab: Dr. Reddy's Laboratories Limited (1.91%), Ascendis Pharma A/S (11.37%), Moderna, Inc. (16.48%), Viatris Inc. (3.96%), Qiagen (2.11%), Roivant Sciences Ltd. (11.68%), Lantheus Holdings, Inc. (10.23%), Revolution Medicines, Inc. (10.62%), BridgeBio Pharma, Inc. (15.57%), Legend Biotech Co. (5.49%), 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 ($21.71 billion), iShares 20+ Year Treasury Bond ETF ($9.48 billion), Strategy Incorporated ($8.92 billion), Charter Communications, Inc. ($3.86 billion), Apollo Global Management, Inc. ($3.86 billion), Capital One Financial Co. ($3.72 billion), Super Micro Computer, Inc. ($3.47 billion), AppLovin Co. ($2.64 billion), VanEck Semiconductor ETF ($2.46 billion), and The Kroger Co. ($2.33 billion). View all of the most shorted stocks. What does it mean to sell short Zai Lab stock? Short selling ZLAB is an investing strategy that aims to generate trading profit from Zai Lab as its price is falling. ZLAB shares are trading down $0.15 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 Zai Lab? A short squeeze for Zai Lab 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 ZLAB, which in turn drives the price of the stock up even further. How often is Zai Lab's 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 ZLAB, twice per month. The most recent reporting period available is April, 15 2025. More Short Interest Resources from MarketBeat Related Companies Dr. Reddy's Laboratories Short Interest Ascendis Pharma A/S Short Interest Moderna Short Interest Viatris Short Interest Qiagen Short Interest Roivant Sciences Short Interest Lantheus Short Interest Revolution Medicines Short Interest BridgeBio Pharma Short Interest Legend Biotech 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:ZLAB) was last updated on 5/1/2025 by MarketBeat.com Staff From Our PartnersHow to invest in Elon Musk’s Optimus before its launchElon Musk is set to completely take over the AI industry with Optimus… A breakthrough AI-powered robot that El...InvestorPlace | SponsoredIs he more powerful than Trump? Is there anybody more powerful than Donald Trump right now? 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