Proto Labs (PRLB) Short Interest Ratio & Short Volume $39.34 +0.09 (+0.22%) Closing price 06/11/2025 03:59 PM EasternExtended Trading$39.32 -0.02 (-0.04%) As of 03:59 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 ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Proto Labs Short Interest DataProto Labs (PRLB) has a short interest of 820,600 shares, representing 3.50% of the float (the number of shares available for trading by the public). This marks a -2.37% decrease in short interest from the previous month. The short interest ratio (days to cover) is 3.9, indicating that it would take 3.9 days of the average trading volume of 240,000 shares to cover all short positions.Current Short Interest820,600 sharesPrevious Short Interest840,500 sharesChange Vs. Previous Month-2.37%Dollar Volume Sold Short$30.37 millionShort Interest Ratio3.9 Days to CoverLast Record DateMay 31, 2025Outstanding Shares23,771,000 sharesFloat Size23,430,000 sharesShort Percent of Float3.50%Today's Trading Volume208,929 sharesAverage Trading Volume240,000 sharesToday's Volume Vs. Average87% Short Selling Proto Labs? Sign up to receive the latest short interest report for Proto Labs and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartPRLB Short Interest Over TimePRLB Days to Cover Over TimePRLB Percentage of Float Shorted Over Time Proto Labs Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 5/31/2025820,600 shares $30.37 million -2.4%3.5%3.9 $37.01 5/15/2025840,500 shares $34.12 million +1.8%3.6%4 $40.60 4/30/2025825,600 shares $28.99 million -7.3%3.5%3.5 $35.11 4/15/2025890,800 shares $30.45 million +10.6%3.8%3.7 $34.18 3/31/2025805,800 shares $28.25 million +14.3%3.4%3.5 $35.06 3/15/2025705,100 shares $25.76 million -6.7%3.0%2.8 $36.53 2/28/2025755,400 shares $30.09 million +11.8%3.2%2.9 $39.84 2/15/2025676,000 shares $29.88 million +13.6%2.8%2.6 $44.20 1/31/2025594,900 shares $24.80 million -11.2%2.5%2.2 $41.68 1/15/2025669,900 shares $25.55 million -1.8%2.8%2.4 $38.14 Get the Latest News and Ratings for PRLB and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Proto Labs and its competitors with MarketBeat's FREE daily newsletter. 12/31/2024682,100 shares $26.66 million -23.6%2.8%2.5 $39.09 12/15/2024892,800 shares $38.92 million +14.2%3.7%3.2 $43.59 11/30/2024781,500 shares $32.19 million +9.9%3.2%2.8 $41.19 11/15/2024711,000 shares $26.64 million -29.6%2.9%2.6 $37.47 10/31/20241,010,000 shares $27.67 million +3.8%4.2%3.7 $27.40 10/15/2024973,400 shares $27.61 million -1.9%3.9%4 $28.36 9/30/2024991,800 shares $29.13 million +42.5%4.0%4.1 $29.37 9/15/2024695,800 shares $20.57 million +1.8%2.8%2.9 $29.57 8/31/2024683,400 shares $20.90 million +6.8%2.8%3.2 $30.58 8/15/2024639,700 shares $19.20 million +32.1%2.6%3.3 $30.01 7/31/2024484,200 shares $16.86 million +1.3%1.9%2.7 $34.82 7/15/2024478,100 shares $15.50 million +6.4%1.9%3.1 $32.42 6/30/2024449,400 shares $13.88 million -14.2%1.8%3 $30.89 6/15/2024524,000 shares $15.99 million -7.6%2.1%3.6 $30.51 5/31/2024566,900 shares $17.56 million +3.8%2.3%4.2 $30.97 5/15/2024546,100 shares $18.11 million +11.8%2.2%3.8 $33.16 4/30/2024488,300 shares $14.88 million -1.1%1.9%2.9 $30.48 4/15/2024493,700 shares $15.69 million -5.4%1.9%3 $31.79 3/31/2024521,600 shares $18.65 million -15.9%2.1%3.1 $35.75 3/15/2024620,100 shares $21.11 million +7.2%2.4%3.8 $34.05 2/29/2024578,600 shares $21.08 million +22.1%2.3%3.1 $36.43 2/15/2024473,800 shares $17.47 million -4.2%1.9%2.6 $36.87 1/31/2024494,300 shares $17.81 million +6.1%1.9%2.6 $36.04 1/15/2024466,100 shares $16.83 million -2.0%1.8%2.2 $36.10 12/31/2023475,600 shares $18.53 million -24.3%1.9%2.3 $38.96 12/15/2023628,200 shares $23.76 million -1.4%2.5%3 $37.82 11/30/2023637,000 shares $23.06 million -3.6%2.5%3.3 $36.20 11/15/2023661,000 shares $23.88 million +28.8%2.6%3.6 $36.13 10/31/2023513,100 shares $12.11 million -30.0%2.0%3.1 $23.61 10/15/2023733,100 shares $18.76 million -12.9%2.8%4.7 $25.59New Rule Hits in July — The Smart Money Already Moved (Ad)A little-known regulation quietly goes into effect this July. And it's already being exploited by Wall Street and the Big Banks… It gives them the green light to treat a certain tangible asset as equivalent to cold, hard cash. Not stocks. Not real estate. And definitely not the U.S. dollar. We're talking about something they don't want you to notice — because the fewer people who act on this, the better it is for them.To help you get started, we're giving away a FREE Wealth Protection Guide that shows you exactly how 9/30/2023841,700 shares $22.22 million -7.3%3.3%5.6 $26.40 9/15/2023907,500 shares $24.43 million +2.4%3.5%5.5 $26.92 8/31/2023885,900 shares $26.14 million +21.0%3.4%5.1 $29.51 8/15/2023732,300 shares $21.17 million -1.4%2.8%4.2 $28.91 7/31/2023742,300 shares $24.61 million -7.2%2.9%4.1 $33.15 7/15/2023800,200 shares $27.83 million -5.7%3.1%4.7 $34.78 6/30/2023848,600 shares $29.67 million -16.0%3.3%4.9 $34.96 6/15/20231,010,000 shares $35.41 million -1.0%3.9%5.9 $35.06 5/31/20231,020,000 shares $31.38 million +4.4%3.9%5.7 $30.76 5/15/2023976,600 shares $30.55 million +1.1%3.8%5 $31.28 4/30/2023966,000 shares $27.79 million -2.7%3.7%4.2 $28.77 4/15/2023992,800 shares $30.22 million +3.3%3.8%4.2 $30.44 3/31/2023960,900 shares $31.85 million -16.4%3.6%4 $33.15 3/15/20231,150,000 shares $36.85 million +6.5%4.4%4.7 $32.04 2/28/20231,080,000 shares $33.96 million +6.9%4.1%4.2 $31.44 2/15/20231,010,000 shares $34.29 million +7.7%3.8%3.7 $33.95 1/31/2023938,100 shares $28.71 million +5.4%3.5%3.3 $30.60 1/15/2023889,800 shares $24.49 million -3.1%3.3%3 $27.52 12/30/2022918,400 shares $23.45 million +14.0%3.4%3.1 $25.53 12/15/2022805,900 shares $20.43 million -12.4%3.0%2.7 $25.35 11/30/2022919,900 shares $24.40 million -9.8%3.4%3.4 $26.52 11/15/20221,020,000 shares $24.05 million +8.3%3.8%4 $23.58 10/31/2022942,300 shares $35.99 million -0.3%3.5%4.4 $38.19 10/15/2022945,300 shares $33.68 million -9.1%3.5%5.3 $35.63 9/30/20221,040,000 shares $37.89 million +17.5%3.8%6.2 $36.43 9/15/2022885,500 shares $34.06 million -5.6%3.3%5.4 $38.46 8/31/2022937,600 shares $36.00 million +9.9%3.4%5.5 $38.40 8/15/2022852,900 shares $39.26 million -2.3%3.1%5.1 $46.03 7/31/2022872,500 shares $42.66 million -5.5%3.5%4.7 $48.89 7/15/2022923,200 shares $43.29 million -4.5%3.7%4.9 $46.89 6/30/2022967,000 shares $46.26 million +2.3%3.9%5 $47.84 6/15/2022945,000 shares $43.86 million +7.2%3.8%4.6 $46.41 5/31/2022881,600 shares $42.48 million -3.3%3.2%4.5 $48.19 5/15/2022912,100 shares $39.18 million -1.6%3.4%4.4 $42.96 4/30/2022927,300 shares $39.51 million +4.7%3.4%4.1 $42.61 4/15/2022886,100 shares $41.94 million -21.6%3.3%3.7 $47.33 3/31/20221,130,000 shares $59.78 million -6.6%4.2%4.4 $52.90 3/15/20221,210,000 shares $59.42 million -10.4%4.5%4.5 $49.11 2/28/20221,350,000 shares $75.91 million +3.1%5.0%4.2 $56.23 2/15/20221,310,000 shares $77.81 million -2.2%4.8%3.4 $59.40 1/31/20221,340,000 shares $67.24 million -14.7%4.9%3.4 $50.18 1/15/20221,570,000 shares $79.00 million -8.7%5.7%3.3 $50.32 12/31/20211,720,000 shares $88.32 million No Change6.3%3.3 $51.35 12/15/20211,720,000 shares $89.42 million -31.8%6.3%3.2 $51.99 11/30/20212,520,000 shares $126.30 million -6.7%9.2%5 $50.12 11/15/20212,700,000 shares $157.41 million +0.4%9.9%5.9 $58.30 10/29/20212,690,000 shares $160.89 million -9.7%9.8%6 $59.81 10/15/20212,980,000 shares $211.04 million +11.2%10.8%7.8 $70.82 9/30/20212,680,000 shares $178.49 million -1.5%9.7%8.2 $66.60 9/15/20212,720,000 shares $191.65 million -3.2%9.9%8.2 $70.46New Rule Hits in July — The Smart Money Already Moved (Ad)A little-known regulation quietly goes into effect this July. And it's already being exploited by Wall Street and the Big Banks… It gives them the green light to treat a certain tangible asset as equivalent to cold, hard cash. Not stocks. Not real estate. And definitely not the U.S. dollar. We're talking about something they don't want you to notice — because the fewer people who act on this, the better it is for them.To help you get started, we're giving away a FREE Wealth Protection Guide that shows you exactly how 8/31/20212,810,000 shares $208.39 million +8.9%10.2%8.5 $74.16 8/13/20212,580,000 shares $203.82 million +8.4%9.4%7.3 $79.00 7/30/20212,380,000 shares $186.09 million +0.4%8.6%6 $78.19 7/15/20212,370,000 shares $200.50 million -12.6%8.6%5.8 $84.60 6/30/20212,710,000 shares $248.78 million -5.6%9.9%6.3 $91.80 6/15/20212,870,000 shares $243.58 million +1.1%10.4%6.4 $84.87 5/28/20212,840,000 shares $253.87 million No Change10.3%6.3 $89.39 5/14/20212,840,000 shares $263.58 million +6.8%N/A5.6 $92.81 4/30/20212,660,000 shares $299.52 million +1.1%N/A4.9 $112.60 4/15/20212,630,000 shares $286.22 million +3.1%N/A4.3 $108.83 3/31/20212,550,000 shares $312.27 million -4.1%N/A4 $122.46 3/15/20212,660,000 shares $358.83 million +31.7%N/A4.2 $134.90 2/26/20212,020,000 shares $296.46 million +5.8%N/A3.4 $146.76 2/12/20211,910,000 shares $383.41 million -8.2%N/A3.6 $200.74 1/29/20212,080,000 shares $456.50 million -47.1%7.8%4.6 $219.47 1/15/20213,930,000 shares $687.83 million -11.5%14.8%9.4 $175.02 12/31/20204,440,000 shares $699.03 million -11.2%16.7%14 $157.44 12/15/20205,000,000 shares $760.35 million +0.6%18.8%17.5 $152.07 11/30/20204,970,000 shares $689.49 million +4.9%18.7%19.1 $138.73 11/15/20204,740,000 shares $618.57 million +10.0%17.8%17.6 $130.50 10/30/20204,310,000 shares $512.11 million +4.9%16.2%16.6 $118.82 10/15/20204,110,000 shares $586.41 million +5.1%15.5%16.1 $142.68 9/30/20203,910,000 shares $506.35 million -0.3%14.7%14.3 $129.50 9/15/20203,920,000 shares $609.52 million -6.9%14.8%14 $155.49 8/31/20204,210,000 shares $618.87 million +0.7%15.9%15.5 $147.00 8/14/20204,180,000 shares $552.05 million -1.9%15.8%15.1 $132.07 7/31/20204,260,000 shares $511.71 million -14.8%16.9%14.3 $120.12 7/15/20205,000,000 shares $559.55 million +4.2%19.9%16.9 $111.91 6/30/20204,800,000 shares $539.86 million +6.9%19.1%17.6 $112.47 6/15/20204,490,000 shares $507.33 million +7.4%17.9%15.7 $112.99 PRLB Short Interest - Frequently Asked Questions What is Proto Labs' current short interest? Short interest is the volume of Proto Labs shares that have been sold short but have not yet been closed out or covered. As of May 31st, traders have sold 820,600 shares of PRLB short. 3.50% of Proto Labs' shares are currently sold short. Learn More on Proto Labs' current short interest. What is a good short interest ratio for Proto Labs? 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. PRLB shares currently have a short interest ratio of 4.0. Learn More on Proto Labs's short interest ratio. Which institutional investors are shorting Proto Labs? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Proto Labs: Walleye Trading LLC, and Walleye Capital LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Proto Labs? 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. 3.50% of Proto Labs' floating shares are currently sold short. Is Proto Labs' short interest increasing or decreasing? Proto Labs saw a drop in short interest in the month of May. As of May 31st, there was short interest totaling 820,600 shares, a drop of 2.4% from the previous total of 840,500 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 Proto Labs' float size? Proto Labs currently has issued a total of 23,771,000 shares. Some of Proto Labs' 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. Proto Labs currently has a public float of 23,430,000 shares. How does Proto Labs' short interest compare to its competitors? 3.50% of Proto Labs' shares are currently sold short. Here is how the short interest of companies in the industry of "industrial machinery" compare to Proto Labs: Albany International Corp. (2.21%), Standex International Co. (2.44%), Kennametal Inc. (5.13%), Tennant (2.78%), TriMas Co. (9.16%), The Gorman-Rupp Company (0.90%), Hyster-Yale Materials Handling, Inc. (5.70%), Energy Recovery, Inc. (1.85%), Graham Co. (2.40%), Columbus McKinnon Co. (2.58%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($64.96 billion), Invesco QQQ ($27.88 billion), iShares Russell 2000 ETF ($19.94 billion), iShares 20+ Year Treasury Bond ETF ($9.69 billion), Strategy Incorporated ($8.58 billion), SPDR S&P Biotech ETF ($5.72 billion), Invesco S&P 500 Equal Weight ETF ($5.45 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($4.70 billion), Charter Communications, Inc. ($4.54 billion), and Industrial Select Sector SPDR Fund ($4.49 billion). View all of the most shorted stocks. What does it mean to sell short Proto Labs stock? Short selling PRLB is an investing strategy that aims to generate trading profit from Proto Labs as its price is falling. PRLB shares are trading up $0.09 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 Proto Labs? A short squeeze for Proto Labs 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 PRLB, which in turn drives the price of the stock up even further. How often is Proto Labs' 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 PRLB, twice per month. The most recent reporting period available is May, 31 2025. More Short Interest Resources from MarketBeat Related Companies Albany International Short Interest Standex International Short Interest Kennametal Short Interest Tennant Short Interest TriMas Short Interest Gorman-Rupp Short Interest Hyster-Yale Materials Handling Short Interest Energy Recovery Short Interest Graham Short Interest Columbus McKinnon 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:PRLB) was last updated on 6/12/2025 by MarketBeat.com Staff From Our PartnersTrump’s Exec Order #14154 could be a “Millionaire-Maker”Former Presidential Advisor, Jim Rickards, says Trump could “rewire our economy and hand millions of Americans...Paradigm Press | SponsoredTrump wipes out trillions overnight…Is there anybody more powerful than Donald Trump right now? In a single tariff announcement, he wiped out n...Porter & Company | SponsoredElon’s NEXT Big IPO?Cancel your internet TODAY!? Take your latest internet bill and light it on fire… then count the seconds it...Banyan Hill Publishing | Sponsored[No Brainer Gold Play]: “Show me a better investment.”A Historic Gold Announcement Is About to Rock Wall Street? For months, sharp-eyed analysts have watched the...Golden Portfolio | SponsoredMarch 16th -- America’s most important day?50-Year Legend: Here's The Day Stocks Likely Crash Legendary quant analyst Marc Chaikin says in 50 years on...Chaikin Analytics | SponsoredBillionaires are piling into this gold investmentBillionaires Are Piling into a Special Gold Investment With record gold prices, everyday Americans are scra...Weiss Ratings | SponsoredBig Changes Coming to Social Security?According to legendary investor Louis Navellier... This new Trump move could soon not only save Social Secu...InvestorPlace | SponsoredSHOCKING: Musk's Pentagon Secret Mission...It's about a harrowing message discovered on December 16, 2024: "美国军方暗杀名单" It's the reason President Tru...Behind the Markets | Sponsored Adding Choose a watchlist: Watchlist Adding You have already added five stocks to your watchlist. Upgrade to MarketBeat All Access to add more stocks to your watchlist. Adding Proto Labs, Inc. Please log in to your account or sign up in order to add this asset to your watchlist. Share Proto Labs With A Colleague Link copied to clipboard. Get 30 Days of MarketBeat All Access for Free Sign up for MarketBeat All Access to gain access to MarketBeat's full suite of research tools. Start Your 30-Day Trial MarketBeat All Access Features Best-in-Class Portfolio Monitoring Get personalized stock ideas. Compare portfolio to indices. Check stock news, ratings, SEC filings, and more. Stock Ideas and Recommendations See daily stock ideas from top analysts. Receive short-term trading ideas from MarketBeat. Identify trending stocks on social media. Advanced Stock Screeners and Research Tools Use our seven stock screeners to find suitable stocks. Stay informed with MarketBeat's real-time news. Export data to Excel for personal analysis. Sign in to your free account to enjoy these benefits In-depth profiles and analysis for 20,000 public companies. Real-time analyst ratings, insider transactions, earnings data, and more. Our daily ratings and market update email newsletter. Sign in to your free account to enjoy all that MarketBeat has to offer. Sign In Create Account Your Email Address: Email Address Required Your Password: Password Required Log In or Sign in with Facebook Sign in with Google Forgot your password? Your Email Address: Please enter your email address. Please enter a valid email address Choose a Password: Please enter your password. Your password must be at least 8 characters long and contain at least 1 number, 1 letter, and 1 special character. Create My Account (Free) or Sign in with Facebook Sign in with Google By creating a free account, you agree to our terms of service. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Buy PRLB Stock Free PRLB Stock Alerts