Proto Labs (PRLB) Short Interest Ratio & Short Volume $41.17 +0.44 (+1.08%) Closing price 07/3/2025 03:30 PM EasternExtended Trading$41.14 -0.03 (-0.07%) As of 07/3/2025 04:20 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 ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Proto Labs Short Interest DataProto Labs (PRLB) has a short interest of 778,600 shares, representing 3.32% of the float (the number of shares available for trading by the public). This marks a -5.12% decrease in short interest from the previous month. The short interest ratio (days to cover) is 3.7, indicating that it would take 3.7 days of the average trading volume of 239,732 shares to cover all short positions.Current Short Interest778,600 sharesPrevious Short Interest820,600 sharesChange Vs. Previous Month-5.12%Dollar Volume Sold Short$29.22 millionShort Interest Ratio3.7 Days to CoverLast Record DateJune 15, 2025Outstanding Shares23,770,000 sharesFloat Size23,430,000 sharesShort Percent of Float3.32%Today's Trading Volume64,180 sharesAverage Trading Volume239,732 sharesToday's Volume Vs. Average27% 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 6/15/2025778,600 shares $29.22 million -5.1%3.3%3.7 $37.53 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 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. 1/15/2025669,900 shares $25.55 million -1.8%2.8%2.4 $38.14 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 $23.61Have you heard of “E.I.”? 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COMBINED!There are 3 simple steps investors can take to be early to this 200,000% E.I. boom - if they act fas 10/15/2023733,100 shares $18.76 million -12.9%2.8%4.7 $25.59 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 $66.60Have you heard of “E.I.”? (Ad)Inside Expert: New "E.I." Tech Could Be Poised For 200,000% Growth Meta, Apple, and even NASA are rushing to invest in new "E.I." Tech, which one expert estimates will grow by 200,000%. Becoming bigger than the automobile, PC, and cell phone markets... COMBINED!There are 3 simple steps investors can take to be early to this 200,000% E.I. boom - if they act fas 9/15/20212,720,000 shares $191.65 million -3.2%9.9%8.2 $70.46 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 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 June 15th, investors have sold 778,600 shares of PRLB short. 3.32% 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. 3.32% 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 June. As of June 15th, there was short interest totaling 778,600 shares, a drop of 5.1% from the previous total of 820,600 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 23,770,000 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? 3.32% 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: Mueller Water Products (3.25%), Kadant Inc (15.16%), Albany International Corporation (2.14%), Standex International Corporation (2.47%), Kennametal Inc. (5.21%), Tennant Company (2.53%), TriMas Corporation (9.73%), Gorman-Rupp Company (The) (0.88%), Hyster-Yale, Inc. (5.47%), Energy Recovery, Inc. (1.89%), 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 ($69.26 billion), Invesco QQQ ($25.22 billion), iShares Russell 2000 ETF ($20.33 billion), iShares 20+ Year Treasury Bond ETF ($9.99 billion), MicroStrategy Incorporated ($9.12 billion), Canadian Natural Resources Limited ($6.73 billion), SPDR S&P Biotech ETF ($6.52 billion), Invesco S&P 500 Equal Weight ETF ($5.60 billion), Financial Select Sector SPDR Fund ($4.64 billion), and iShares iBoxx $ Investment Grade Corporate Bond ETF ($4.59 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 $0.44 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 June, 15 2025. More Short Interest Resources from MarketBeat Related Companies Mueller Water Products Short Interest Kadant Short Interest Albany International Short Interest Standex International Short Interest Kennametal Short Interest Tennant Short Interest TriMas Short Interest Gorman-Rupp Short Interest Hyster-Yale Short Interest Energy Recovery 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 7/4/2025 by MarketBeat.com Staff From Our PartnersWhite House to reset Social Security?Elon Musk's parting DOGE gift looks set to shock America... 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