Rocket LabSTU:6RJ0 +3.85%49 FCF Margin % is -38.63% as of Mar. 2026. GuruFocus rates STU:6RJ0 with a GF Score™ of 49/100 and a GF Value™ of €23.39 (Significantly Overvalued). The stock has 1 warning sign investors should review. Among 348 Aerospace & Defense companies, Rocket Lab ranks worse than 86.21% on this metric.
FCF Margin % is calculated as Free Cash Flow divided by its Revenue. Rocket Lab's Free Cash Flow for the
three
months ended in Mar. 2026 was €-66.9 Mil. Rocket Lab's Revenue for the
three
months ended in Mar. 2026 was €173.3 Mil. Therefore, Rocket Lab's FCF Margin % for the quarter that ended in Mar. 2026 was -38.63%.
The historical rank and industry rank for Rocket Lab's FCF Margin % or its related term are showing as below:
STU:6RJ0'
s FCF Margin % Range Over the Past 10 Years
Min: -156.64 Med: -66.69 Max: -26.59
Current: -46.49
During the past 6 years, the highest FCF Margin % of Rocket Lab was -26.59%. The lowest was -156.64%. And the median was -66.69%.
STU:6RJ0's FCF Margin % is ranked worse than 86.21% of 348
companies
in the Aerospace & Defense industry
Industry Median: 0.645
vs STU:6RJ0: -46.49
Rocket Lab FCF Margin % Related Terms
Rocket Lab FCF Margin % Historical Data
* Premium members only.
The historical data trend for Rocket Lab's FCF Margin % can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
STU:6RJ0 vs LHX, HEI.A, AXON: FCF Margin % Comparison
For the Aerospace & Defense subindustry, Rocket Lab's FCF Margin %, along with its competitors' market caps and FCF Margin % 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.
Rocket Lab FCF Margin % vs Aerospace & Defense Industry
For the Aerospace & Defense industry and Industrials sector, Rocket Lab's FCF Margin % distribution charts can be found below:
* The bar in red indicates where Rocket Lab's FCF Margin % falls into.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Rocket Lab (STU:6RJ0) has a FCF Margin % of -38.63% as of Mar. 2026. Free cash flow margin is the ratio of total free cash flow to net sales. View historical data on Rocket Lab and its competitors. According to the industry distribution chart, Rocket Lab ranks #300 out of 348 companies in the Aerospace & Defense industry, placing it in the top 86.2%.
Is Rocket Lab's FCF Margin % too high?
Rocket Lab's current FCF Margin % is -38.63%. Based on the distribution chart, Rocket Lab ranks #300 out of 348 companies in the Aerospace & Defense industry, which is in the bottom quartile relative to peers. Overall, Rocket Lab has a GF Score™ of 49/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Rocket Lab's FCF Margin % compare to LHX and HEI.A?
According to the Aerospace & Defense industry distribution chart, Rocket Lab ranks #300 out of 348 companies for FCF Margin %. This places Rocket Lab in the lower half of its industry. The industry median FCF Margin % is 0.65. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good FCF Margin % for an Aerospace & Defense company?
The median FCF Margin % among Aerospace & Defense companies is 0.65, based on 348 companies in the industry. Companies in the top quartile (top 25%) have a FCF Margin % significantly above this median, while those in the bottom quartile fall well below. However, FCF Margin % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high FCF Margin % mean?
A high FCF Margin % can signal that a stock is expensive relative to its fundamentals. Free cash flow margin is the ratio of total free cash flow to net sales. View historical data on Rocket Lab and its competitors. For the Aerospace & Defense industry, the median FCF Margin % is 0.65 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Rocket Lab's current FCF Margin % is -38.63%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Rocket Lab stock overvalued right now?
Based on GuruFocus' analysis, Rocket Lab (STU:6RJ0) is currently considered Significantly Overvalued. The stock's GF Value™ is €23.39, compared to a current price of €89.00 — trading 280.5% above its estimated fair value. The current FCF Margin % is -38.63%. Rocket Lab's overall GF Score™ is 49/100 with 1 warning sign to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is FCF Margin % calculated?
FCF Margin % is calculated from a company's financial statements. For Rocket Lab (STU:6RJ0), the current FCF Margin % is -38.63% as of Mar. 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 Rocket Lab (STU:6RJ0) Overvalued in 2026?
Based on GuruFocus' analysis, Rocket Lab stock appears to be overvalued.
The current stock price of €89.00 is trading 280.5% above its estimated GF Value™ of €23.39.
GuruFocus considers Rocket Lab to be Significantly Overvalued.
Key valuation signals for STU:6RJ0:
FCF Margin %: -38.63%
GF Value™: €23.39 vs. price of €89.00 (280.5% above fair value)
No single metric tells the full story. See the STU:6RJ0 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Rocket Lab Corp is engaged in space, building rockets, and spacecraft. It provides end-to-end mission services that provide frequent and reliable access to space for civil, defense, and commercial markets. It designs and manufactures the Electron and Neutron launch vehicles and Photon satellite platform. Rocket Lab's Electron launch vehicle has delivered multiple satellites to orbit for private and public sector organizations, enabling operations in national security, scientific research, space debris mitigation, Earth observation, climate monitoring, and communications. The business operates in two segments Launch Services and Space Systems. Geographically it serves Japan, and rest of the world and earns key revenue from the United States.
49GF Score
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