Direct Answer
Northrop Grumman reports revenue across 4 business segments in its fiscal 2025 Form 10-K. Aeronautics Systems is the largest, with $13.0 billion of revenue (31% of the total), followed by Mission Systems at $12.5 billion (30%). 86% of revenue came from the United States.
How Does Northrop Grumman Make Money?
No single line supplies a majority of revenue: the largest, Aeronautics Systems, is 31%, which spreads Northrop Grumman's exposure across several demand drivers. Between fiscal 2024 and 2025, Mission Systems grew fastest (+9.7%) and Space Systems slowest (-8.2%), so the revenue mix tilts toward Mission Systems while that gap lasts.
| Segment | FY2025 revenue | FY2024 revenue | Share of revenue | Change |
|---|---|---|---|---|
| Aeronautics Systems | $13.0 billion | $12.4 billion | 31.0% | 4.8% |
| Mission Systems | $12.5 billion | $11.4 billion | 29.8% | 9.7% |
| Space Systems | $10.8 billion | $11.7 billion | 25.7% | -8.2% |
| Defense Systems | $8.0 billion | $7.4 billion | 19.1% | 8.1% |
Which Northrop Grumman Segments Earn the Most?
| Segment | FY2025 segment operating income | Segment margin |
|---|---|---|
| Aeronautics Systems | $813 million | 6.3% |
| Mission Systems | $1.8 billion | 14.6% |
| Space Systems | $1.2 billion | 11.0% |
| Defense Systems | $871 million | 10.9% |
Segment operating income is the profit measure Northrop Grumman reports to its chief operating decision maker for each segment. It usually leaves out corporate costs that are not allocated to a segment, so the segments usually add up to more than consolidated operating income, and margins are comparable within Northrop Grumman more safely than against another company.
What Does Northrop Grumman Sell?
Northrop Grumman also breaks revenue down by product and service line, which shows what customers pay for rather than how management organizes the business.
| Product or service | FY2025 revenue | FY2024 revenue | Share of revenue | Change |
|---|---|---|---|---|
| Product | $33.7 billion | $32.7 billion | 80.4% | 3.1% |
| Service | $8.2 billion | $8.3 billion | 19.6% | -1.1% |
Where Does Northrop Grumman's Revenue Come From?
Regions follow the definitions in the filing; most companies assign revenue by customer location.
| Region | FY2025 revenue | FY2024 revenue | Share of revenue | Change |
|---|---|---|---|---|
| United States | $36.0 billion | $36.0 billion | 85.7% | -0.2% |
| Europe | $3.3 billion | $2.8 billion | 7.8% | 15.8% |
| Asia Pacific | $1.9 billion | $1.6 billion | 4.6% | 23.6% |
| All Other Geographic Region | $785 million | $611 million | 1.9% | 28.5% |
What the Segment Figures Do Not Show
The rows above add up to 106% of Northrop Grumman's reported revenue for fiscal 2025; the difference is intersegment eliminations, corporate revenue or items the company reports outside its segments. Segment definitions are management's choice and change when a company reorganizes, in which case it restates prior years in the next filing, so a multi-year comparison should use the figures from a single filing. Revenue shows where sales come from, not where profit or cash is earned: a small segment can carry most of the margin.
Where These Numbers Come From
Every figure on this page is a value Northrop Grumman reported in the segment note and revenue disclosures of its Form 10-K filed January 27, 2026 (accession 0001133421-26-000003), read from the SEC's Financial Statement Data Sets. The prior-year column is the comparative figure from that same filing, so it reflects any restatement for a change in segments. Category names are the company's own XBRL labels, lightly reformatted for reading.
Rows that only total other rows (for example a "Products" line beside the individual products) are left out so nothing is counted twice. This page is educational and describes reported history for fiscal 2025; it is not a forecast or a recommendation.
Frequently Asked Questions
What are Northrop Grumman's business segments?
In its fiscal 2025 Form 10-K, Northrop Grumman reports revenue for Aeronautics Systems, Mission Systems, Space Systems and Defense Systems.
Which part of Northrop Grumman brings in the most revenue?
Aeronautics Systems, with $13.0 billion of revenue in fiscal 2025, or 31% of the total.
How much of Northrop Grumman's revenue comes from outside the United States?
14% in fiscal 2025, by the geographic breakdown Northrop Grumman reports in its Form 10-K. Companies assign revenue to regions differently (customer location, shipping address or selling entity), so check the filing's definition before comparing companies.