West Pharmaceutical Services (WST) Short Interest Ratio & Short Volume $227.45 +3.68 (+1.64%) Closing price 03:59 PM EasternExtended Trading$226.12 -1.33 (-0.59%) As of 06:36 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 Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock West Pharmaceutical Services Short Interest DataWest Pharmaceutical Services (WST) has a short interest of 2.25 million shares, representing 3.15% of the float (the number of shares available for trading by the public). This marks a -10.71% decrease in short interest from the previous month. The short interest ratio (days to cover) is 2.4, indicating that it would take 2.4 days of the average trading volume of 734,146 shares to cover all short positions.Current Short Interest2,250,000 sharesPrevious Short Interest2,520,000 sharesChange Vs. Previous Month-10.71%Dollar Volume Sold Short$473.54 millionShort Interest Ratio2.4 Days to CoverLast Record DateMay 15, 2025Outstanding Shares71,845,000 sharesFloat Size71,390,000 sharesShort Percent of Float3.15%Today's Trading Volume757,302 sharesAverage Trading Volume734,146 sharesToday's Volume Vs. Average103% Short Selling West Pharmaceutical Services? Sign up to receive the latest short interest report for West Pharmaceutical Services and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartWST Short Interest Over TimeWST Days to Cover Over TimeWST Percentage of Float Shorted Over Time West Pharmaceutical Services Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 5/15/20252,250,000 shares $473.54 million -10.7%3.2%2.4 $210.46 4/30/20252,520,000 shares $532.00 million +80.0%3.5%2.2 $211.11 4/15/20251,400,000 shares $297.34 million -2.1%2.0%1.3 $212.39 3/31/20251,430,000 shares $320.24 million -7.1%2.0%1.4 $223.95 3/15/20251,540,000 shares $354.71 million +12.4%2.1%1.6 $230.33 2/28/20251,370,000 shares $318.43 million +15.1%1.9%1.6 $232.43 2/15/20251,190,000 shares $255.65 million -11.2%1.7%1.6 $214.84 1/31/20251,340,000 shares $458.12 million -10.7%1.9%2.7 $341.88 1/15/20251,500,000 shares $493.70 million No Change2.1%2.6 $329.13 12/31/20241,500,000 shares $491.34 million +29.3%2.1%2.4 $327.56 Get the Latest News and Ratings for WST and Related StocksEnter your email address below to receive the latest news and analysts' ratings for West Pharmaceutical Services and its competitors with MarketBeat's FREE daily newsletter. 12/15/20241,160,000 shares $382.86 million No Change1.6%1.8 $330.05 11/30/20241,160,000 shares $377.79 million -10.8%1.6%2 $325.68 11/15/20241,300,000 shares $408.82 million -9.1%1.8%2.2 $314.48 10/31/20241,430,000 shares $440.30 million -7.1%2.0%2.6 $307.90 10/15/20241,540,000 shares $448.05 million +6.9%2.1%2.6 $290.94 9/30/20241,440,000 shares $432.23 million -7.7%2.0%2.6 $300.16 9/15/20241,560,000 shares $469.05 million +2.0%2.2%2.8 $300.67 8/31/20241,530,000 shares $479.85 million +21.4%2.1%2.5 $313.63 8/15/20241,260,000 shares $368.68 million +6.8%1.8%2 $292.60 7/31/20241,180,000 shares $361.28 million -4.8%1.6%1.8 $306.17 7/15/20241,240,000 shares $396.97 million +0.8%1.7%2.2 $320.14 6/30/20241,230,000 shares $405.15 million +0.8%1.7%2.3 $329.39 6/15/20241,220,000 shares $406.57 million -4.7%1.7%2.4 $333.25 5/31/20241,280,000 shares $424.20 million +12.3%1.8%2.6 $331.41 5/15/20241,140,000 shares $400.66 million +9.6%1.6%2.4 $351.46 4/30/20241,040,000 shares $371.70 million +6.6%1.4%2 $357.40 4/15/2024975,900 shares $369.68 million -13.6%1.3%1.8 $378.81 3/31/20241,130,000 shares $447.15 million -6.6%1.6%2.1 $395.71 3/15/20241,210,000 shares $469.02 million +0.8%1.7%2.3 $387.62 2/29/20241,200,000 shares $430.03 million +17.7%1.7%2.3 $358.36 2/15/20241,020,000 shares $357.71 million -12.1%1.4%2 $350.70 1/31/20241,160,000 shares $432.71 million +8.4%1.6%2.6 $373.03 1/15/20241,070,000 shares $371.04 million -8.6%1.5%2.5 $346.77 12/31/20231,170,000 shares $411.98 million -1.7%1.6%2.7 $352.12 12/15/20231,190,000 shares $426.26 million No Change1.6%2.9 $358.20 11/30/20231,190,000 shares $417.33 million -7.0%1.6%3.1 $350.70 11/15/20231,280,000 shares $442.85 million +35.9%1.7%3.5 $345.98 10/31/2023942,000 shares $299.83 million -13.6%1.3%2.7 $318.29 10/15/20231,090,000 shares $419.72 million +27.1%1.5%3.2 $385.06 9/30/2023857,300 shares $321.67 million -3.2%1.2%2.6 $375.21Get Ready for Elon Musk’s BIGGEST Comeback Yet (Ad)Tesla's About to Prove Everyone Wrong... 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Click here to see why Tesla's about to prove everyone wrong... again. 9/15/2023885,200 shares $348.93 million -3.5%1.2%2.6 $394.18 8/31/2023916,900 shares $373.09 million +7.8%1.3%2.6 $406.90 8/15/2023850,900 shares $342.17 million +37.9%1.2%2.2 $402.13 7/31/2023617,100 shares $227.12 million -15.7%0.8%1.6 $368.04 7/15/2023731,700 shares $281.80 million -14.8%1.0%1.9 $385.13 6/30/2023858,300 shares $328.27 million -13.6%1.2%2.1 $382.47 6/15/2023993,500 shares $357.46 million +15.8%1.4%2.4 $359.80 5/31/2023858,300 shares $287.21 million -0.6%1.2%2 $334.63 5/15/2023863,800 shares $306.80 million -27.4%1.2%1.9 $355.18 4/30/20231,190,000 shares $429.88 million -11.9%1.6%2.2 $361.24 4/15/20231,350,000 shares $491.31 million +0.8%1.8%2.5 $363.93 3/31/20231,340,000 shares $464.27 million -14.7%1.8%2.3 $346.47 3/15/20231,570,000 shares $511.18 million +2.0%2.1%2.7 $325.59 2/28/20231,540,000 shares $488.23 million -7.8%2.1%2.5 $317.03 2/15/20231,670,000 shares $466.23 million +24.6%2.3%2.7 $279.18 1/31/20231,340,000 shares $355.90 million +5.5%1.8%2.1 $265.60 1/15/20231,270,000 shares $318.39 million -7.3%1.7%1.7 $250.70 12/30/20221,370,000 shares $322.43 million +18.1%1.9%1.8 $235.35 12/15/20221,160,000 shares $275.01 million -19.4%1.6%1.5 $237.08 11/30/20221,440,000 shares $337.91 million +44.9%2.0%2 $234.66 11/15/2022993,800 shares $246.15 million +18.1%1.4%1.5 $247.69 10/31/2022841,400 shares $193.61 million +1.7%1.1%1.5 $230.10 10/15/2022827,400 shares $204.81 million -11.5%1.1%1.8 $247.53 9/30/2022934,600 shares $229.99 million +12.0%1.3%2.3 $246.08 9/15/2022834,700 shares $228.48 million +17.2%1.1%2.1 $273.73 8/31/2022712,200 shares $211.30 million -17.2%1.0%1.8 $296.69 8/15/2022860,500 shares $293.28 million -5.7%1.2%2.1 $340.82 7/31/2022912,100 shares $313.36 million -5.1%1.2%2.1 $343.56 7/15/2022960,800 shares $288.66 million +6.0%1.3%2.1 $300.44 6/30/2022906,800 shares $274.19 million +19.2%1.2%2 $302.37 6/15/2022761,000 shares $220.61 million +4.5%1.0%1.7 $289.89 5/31/2022728,100 shares $225.99 million -14.4%1.0%1.7 $310.38 5/15/2022850,700 shares $259.44 million -13.5%1.2%2 $304.97 4/30/2022983,400 shares $309.83 million -14.5%1.3%2.3 $315.06 4/15/20221,150,000 shares $438.40 million -4.2%1.6%2.7 $381.22 3/31/20221,200,000 shares $492.85 million -3.2%1.6%2.8 $410.71 3/15/20221,240,000 shares $477.93 million +20.4%1.7%2.9 $385.43 2/28/20221,030,000 shares $398.69 million No Change1.4%2.4 $387.08 2/15/20221,030,000 shares $396.93 million -13.5%1.4%2.4 $385.37 1/31/20221,190,000 shares $467.93 million +64.5%1.6%2.9 $393.22 1/15/2022723,600 shares $274.81 million -19.2%1.0%1.7 $379.78 12/31/2021895,900 shares $420.19 million -16.3%1.2%2.4 $469.01 12/15/20211,070,000 shares $474.57 million -4.5%1.5%2.8 $443.52 11/30/20211,120,000 shares $495.78 million -9.7%1.5%3 $442.66 11/15/20211,240,000 shares $523.85 million +36.1%1.7%3.5 $422.46 10/29/2021911,300 shares $391.75 million -7.9%1.2%2.6 $429.88 10/15/2021989,500 shares $400.56 million +13.1%1.4%3 $404.81 9/30/2021874,800 shares $371.39 million +11.1%1.2%2.7 $424.54 9/15/2021787,300 shares $356.25 million -13.8%1.1%2.4 $452.49 8/31/2021913,500 shares $412.55 million -13.8%1.2%2.8 $451.62The Robotics Revolution has arrived … and one $7 stock could take off as a result. 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However, it's impact on the US economy and society will be FAR greater than anything we ever imagined.This little-known company holds nearly 100 patents and trades for around $7 8/13/20211,060,000 shares $460.34 million +8.9%1.4%3.1 $434.28 7/30/2021973,000 shares $400.61 million +0.6%1.3%2.6 $411.73 7/15/2021967,000 shares $359.69 million -13.7%1.3%2.6 $371.96 6/30/20211,120,000 shares $402.19 million -0.9%1.5%2.9 $359.10 6/15/20211,130,000 shares $389.67 million +11.9%1.5%2.9 $344.84 5/28/20211,010,000 shares $350.99 million -1.0%1.4%2.5 $347.51 5/14/20211,020,000 shares $334.87 million +18.2%1.4%2.5 $328.30 4/30/2021862,900 shares $280.05 million +28.4%1.2%2 $324.55 4/15/2021672,300 shares $201.73 million -2.9%0.9%1.5 $300.06 3/31/2021692,500 shares $192.75 million +7.6%0.9%1.5 $278.34 3/15/2021643,800 shares $176.48 million +6.9%0.9%1.3 $274.12 2/26/2021602,000 shares $167.16 million -9.9%0.8%1.2 $277.68 2/12/2021668,400 shares $194.56 million -21.0%0.9%1.4 $291.09 1/29/2021845,500 shares $252.74 million +20.9%1.2%1.8 $298.92 1/15/2021699,100 shares $208.84 million +6.2%1.0%1.6 $298.72 12/31/2020658,400 shares $184.31 million +11.6%0.9%1.6 $279.94 12/15/2020590,000 shares $156.30 million +7.6%0.8%1.4 $264.92 11/30/2020548,600 shares $152.49 million -8.3%0.8%1.2 $277.96 10/30/2020626,900 shares $172.54 million -17.3%0.9%1.4 $275.23 10/15/2020758,000 shares $218.42 million +10.9%1.0%1.6 $288.15 9/30/2020683,600 shares $187.92 million -3.6%0.9%1.3 $274.90 9/15/2020709,100 shares $201.65 million -4.6%1.0%1.3 $284.38 8/31/2020743,600 shares $211.15 million +0.9%1.0%1.3 $283.96 8/14/2020736,700 shares $200.73 million +5.5%1.0%1.2 $272.47 7/31/2020698,100 shares $187.70 million -9.2%1.0%0.8 $268.87 7/15/2020768,700 shares $179.32 million -16.0%1.1%0.9 $233.28 6/30/2020915,500 shares $207.97 million +0.2%1.3%1.1 $227.17 6/15/2020914,100 shares $191.39 million +30.3%1.3%1.1 $209.37 WST Short Interest - Frequently Asked Questions What is West Pharmaceutical Services' current short interest? Short interest is the volume of West Pharmaceutical Services shares that have been sold short but have not yet been covered or closed out. As of May 15th, investors have sold 2,250,000 shares of WST short. 3.15% of West Pharmaceutical Services' shares are currently sold short. Learn More on West Pharmaceutical Services' current short interest. What is a good short interest ratio for West Pharmaceutical Services? 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. WST shares currently have a short interest ratio of 2.0. Learn More on West Pharmaceutical Services's short interest ratio. Which institutional investors are shorting West Pharmaceutical Services? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of West Pharmaceutical Services: Quaker Wealth Management LLC, Jane Street Group LLC, Parallax Volatility Advisers L.P., Millennium Management LLC, Twin Tree Management LP, PEAK6 LLC, Walleye Trading LLC, Walleye Capital LLC, Arrowpoint Investment Partners Singapore Pte. Ltd., and Wealth Enhancement Advisory Services LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for West Pharmaceutical Services? 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. 3.15% of West Pharmaceutical Services' floating shares are currently sold short. Is West Pharmaceutical Services' short interest increasing or decreasing? West Pharmaceutical Services saw a decline in short interest in the month of May. As of May 15th, there was short interest totaling 2,250,000 shares, a decline of 10.7% from the previous total of 2,520,000 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 West Pharmaceutical Services' float size? West Pharmaceutical Services currently has issued a total of 71,845,000 shares. Some of West Pharmaceutical Services' 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. West Pharmaceutical Services currently has a public float of 71,390,000 shares. How does West Pharmaceutical Services' short interest compare to its competitors? 3.15% of West Pharmaceutical Services' shares are currently sold short. Here is how the short interest of companies compare to West Pharmaceutical Services: The Cooper Companies, Inc. (2.55%), Align Technology, Inc. (4.40%), Merit Medical Systems, Inc. (5.61%), Haemonetics Co. (8.60%), ICU Medical, Inc. (4.27%), DENTSPLY SIRONA Inc. (4.81%), QuidelOrtho Co. (6.35%), Neogen Co. (12.66%), STAAR Surgical (11.50%), Cerus Co. (4.93%), 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 West Pharmaceutical Services stock? Short selling WST is an investing strategy that aims to generate trading profit from West Pharmaceutical Services as its price is falling. WST shares are trading up $2.56 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 West Pharmaceutical Services? A short squeeze for West Pharmaceutical Services 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 WST, which in turn drives the price of the stock up even further. How often is West Pharmaceutical Services' 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 WST, twice per month. The most recent reporting period available is May, 15 2025. More Short Interest Resources from MarketBeat Related Companies COO Short Interest ALGN Short Interest MMSI Short Interest HAE Short Interest ICUI Short Interest XRAY Short Interest QDEL Short Interest NEOG Short Interest STAA Short Interest CERS Short Interest Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NYSE:WST) was last updated on 6/10/2025 by MarketBeat.com Staff From Our PartnersBanks aren’t ready for this altcoin—are you?While everyone's distracted by Bitcoin's moves, a stealth revolution is underway. One altcoin is quietly po...Crypto 101 Media | SponsoredElon’s NEXT Big IPO?Cancel your internet TODAY!? 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