Direct Answer
Leidos reports revenue across 4 business segments in its fiscal 2025 Form 10-K. National Security and Digital is the largest, with $7.6 billion of revenue (44% of the total), followed by Health and Civil at $5.1 billion (30%).
How Does Leidos Make Money?
No single line supplies a majority of revenue: the largest, National Security and Digital, is 44%, which spreads Leidos's exposure across several demand drivers. Between fiscal 2024 and 2025, Defense Systems grew fastest (+7.3%) and Health and Civil slowest (+1.1%), so the revenue mix tilts toward Defense Systems while that gap lasts.
| Segment | FY2025 revenue | FY2024 revenue | Share of revenue | Change |
|---|---|---|---|---|
| National Security and Digital | $7.6 billion | $7.4 billion | 44.3% | 3.3% |
| Health and Civil | $5.1 billion | $5.0 billion | 29.5% | 1.1% |
| Commercial and International | $2.3 billion | $2.3 billion | 13.5% | 2.8% |
| Defense Systems | $2.2 billion | $2.0 billion | 12.7% | 7.3% |
What the Segment Figures Do Not Show
The rows above add up to 100% of Leidos'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 Leidos reported in the segment note and revenue disclosures of its Form 10-K filed February 17, 2026 (accession 0001336920-26-000030), 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 Leidos's business segments?
In its fiscal 2025 Form 10-K, Leidos reports revenue for National Security and Digital, Health and Civil, Commercial and International and Defense Systems.
Which part of Leidos brings in the most revenue?
National Security and Digital, with $7.6 billion of revenue in fiscal 2025, or 44% of the total.
Where does Leidos report its segment results?
In the segment note to the financial statements in its Form 10-K, most recently filed February 17, 2026, alongside management's discussion of each segment's results.