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Proto LabsPRLB -1.78%67 3-Year Book Growth Rate is 3.20% as of Jun. 2026, which is 78% below its 10-year median of 14.60. GuruFocus rates PRLB with a GF Score™ of 67/100 and a GF Value™ of $46.27 (Significantly Overvalued). The stock has 4 warning signs investors should review. Among 2,943 Industrial Products companies, Proto Labs ranks worse than 62.28% on this metric.
During the past 12 months, Proto Labs's average Book Value per Share Growth Rate was 3.90% per year.
During the past 3 years, the average Book Value per Share Growth Rate was 3.20% per year.
During the past 5 years, the average Book Value per Share Growth Rate was 1.80% per year.
During the past 10 years, the average Book Value per Share Growth Rate was 8.50% per year.
Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the average Book Value per Share growth rate.
During the past 13 years, the highest 3-Year average Book Value per Share Growth Rate of Proto Labs was 25.60% per year. The lowest was -2.80% per year. And the median was 14.60% per year.
Proto Labs (NYSE:PRLB) 3-Year Book Growth Rate Explanation
Book Value per Share is the ratio of equity available to common shareholders divided by the shares outstanding. Book value per share effectively indicates a firm's net asset value on a per-share basis. It can be used by investors to gauge whether a stock price is undervalued by comparing it to the firm's market value per share. Theoretically, it is what the shareholders will receive if the company is liquidated.
Proto Labs 3-Year Book Growth Rate Related Terms
PRLB vs RYZ, WOR, MEC: 3-Year Book Growth Rate Comparison
For the Metal Fabrication subindustry, Proto Labs's 3-Year Book Growth Rate, along with its competitors' market caps and 3-Year Book Growth Rate data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Proto Labs 3-Year Book Growth Rate vs Industrial Products Industry
For the Industrial Products industry and Industrials sector, Proto Labs's 3-Year Book Growth Rate distribution charts can be found below:
* The bar in red indicates where Proto Labs's 3-Year Book Growth Rate falls into.
This is the 3-year average growth rate of Book Value per Share. The growth rate is calculated using exponential compounding based on the latest four year annual data.
Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the average Book Value per Share growth rate.
What does a 3-Year Book Growth Rate of 3.20% mean?
Proto Labs (PRLB) has a 3-Year Book Growth Rate of 3.20% as of Jun. 2026. 3-Year Book Growth Rate is the 3-year average growth rate of Book Value per Share. View historical data for Proto Labs and its competitors. This is 78% below median its historical median of 14.60. According to the industry distribution chart, Proto Labs ranks #1833 out of 2943 companies in the Industrial Products industry, placing it in the top 62.3%.
Is Proto Labs' 3-Year Book Growth Rate too high?
Proto Labs' current 3-Year Book Growth Rate of 3.20% is 78% below median its 10-year median of 14.60. The Industrial Products industry median 3-Year Book Growth Rate is 6.00. Proto Labs' value of 3.20% is 46.7% below this industry median. Based on the distribution chart, Proto Labs ranks #1833 out of 2943 companies in the Industrial Products industry, which is below the industry midpoint. Overall, Proto Labs has a GF Score™ of 67/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Proto Labs' 3-Year Book Growth Rate compare to RYZ and WOR?
According to the Industrial Products industry distribution chart, Proto Labs ranks #1833 out of 2943 companies for 3-Year Book Growth Rate. This places Proto Labs in the lower half of its industry. The industry median 3-Year Book Growth Rate is 6.00. Proto Labs' value of 3.20% is 46.7% below this benchmark. While the company's 10-year median is 14.60 vs. the industry median of 6.00, Proto Labs has consistently been below the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good 3-Year Book Growth Rate for an Industrial Products company?
The median 3-Year Book Growth Rate among Industrial Products companies is 6.00, based on 2,943 companies in the industry. Companies in the top quartile (top 25%) have a 3-Year Book Growth Rate significantly above this median, while those in the bottom quartile fall well below. However, 3-Year Book Growth Rate should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Proto Labs's current 3-Year Book Growth Rate of 3.20% is 46.7% below the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high 3-Year Book Growth Rate mean?
A high 3-Year Book Growth Rate can signal that a stock is expensive relative to its fundamentals. 3-Year Book Growth Rate is the 3-year average growth rate of Book Value per Share. View historical data for Proto Labs and its competitors. For the Industrial Products industry, the median 3-Year Book Growth Rate is 6.00 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Proto Labs's current 3-Year Book Growth Rate is 3.20%, which is 78% below median its own 10-year median of 14.60. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Proto Labs stock overvalued right now?
Based on GuruFocus' analysis, Proto Labs (PRLB) is currently considered Significantly Overvalued. The stock's GF Value™ is $46.27, compared to a current price of $80.62 — trading 74.2% above its estimated fair value. The current 3-Year Book Growth Rate is 3.20%, which is 78% below median its 10-year median of 14.60 and 46.7% below the Industrial Products industry median of 6.00. Proto Labs' overall GF Score™ is 67/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is 3-Year Book Growth Rate calculated?
3-Year Book Growth Rate is calculated from a company's financial statements. For Proto Labs (PRLB), the current 3-Year Book Growth Rate is 3.20% as of Jun. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Proto Labs (PRLB) Overvalued in 2026?
Based on GuruFocus' analysis, Proto Labs stock appears to be overvalued.
The current stock price of $80.62 is trading 74.2% above its estimated GF Value™ of $46.27.
GuruFocus considers Proto Labs to be Significantly Overvalued.
Key valuation signals for PRLB:
3-Year Book Growth Rate: 3.20% (78% below median its 10-year median of 14.60)
GF Value™: $46.27 vs. price of $80.62 (74.2% above fair value)
Industry Position: 46.7% below the Industrial Products median (#1833 of 2943)
No single metric tells the full story. See the PRLB stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Proto Labs Inc is an on-demand manufacturer of custom parts for prototyping and short-run production. The company offers developers and engineers quick-turn production services to reduce the time to market. The Lab uses injection molding, computer numerical control machining, and 3-D printing, and sheet metal to manufacture custom parts for its clients. The company services clients' needs for prototype solutions, parts for testing procedures, bridge production capabilities during disruptions in manufacturing processes, limited-quantity requests, and end-of-life production support. Geographically, a majority of the company's revenue is derived from the United States and the rest from Europe.
67GF Score
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