Is LDOS a Buy? What to Consider in 2026
Last updated July 2026
Short answer
The bull case for Leidos Holdings (LDOS) rests on Large backlog and revenue visibility: Leidos ended its most recent quarter with total backlog of roughly $48 billion, giving multi-year visibility into future revenue. Revenue (TTM) is ~$17.5B. If you believe that thesis holds, the real questions become position sizing and overlap, not timing. The main risk to that view: The overwhelming majority of Leidos revenue comes from the U.S. Whether LDOS is a buy comes down to whether you believe the thesis. This is informational, not a recommendation, and Walnut is not an investment adviser.
Leidos Holdings is a large government services and technology contractor that builds and runs mission systems for U.S. federal agencies and allied governments. Its work spans intelligence and digital modernization, cybersecurity, defense systems, homeland security (including airport and border screening technology), and health services such as medical exams and health IT. Roughly the bulk of its revenue comes from the U.S. government, making it a prime contractor on long-duration programs rather than a commercial-product company. The investment picture is one of scale, stability, and modest growth. Leidos carries a very large multi-year backlog that provides revenue visibility, generates substantial free cash flow, and has been expanding margins as it shifts toward higher-value digital and intelligence work. The trade-off is that growth is measured in the low-to-mid single digits, results depend heavily on federal appropriations and contract win rates, and the stock is valued modestly versus the broader market, reflecting both the defensiveness and the ceiling of a government-dependent model.
What's the case for buying LDOS?
1. Large backlog and revenue visibility
Leidos ended its most recent quarter with total backlog of roughly $48 billion, giving multi-year visibility into future revenue. A trailing-twelve-month book-to-bill near 1.1 suggests it is replacing completed work with new awards, which supports the low-to-mid single digit revenue growth management has guided toward.
2. Margin expansion and cash generation
The company has pushed adjusted EBITDA margin into the mid-teens (around 14% in the latest quarter) as it mixes toward higher-value intelligence, digital, and cyber work. Strong free cash flow funds buybacks, a dividend, and debt reduction, which are core to the total-return case for a slow-growth contractor.
3. Defense, AI, and intelligence modernization demand
Federal priorities around cybersecurity, AI governance, edge computing, and command-and-control modernization (such as JADC2) expand the addressable market for Leidos. Its Intelligence & Digital segment has been the fastest grower, and management raised full-year 2026 guidance on the strength of that demand.
4. Diversification across agencies and missions
Revenue spans defense, intelligence, homeland security screening, and health services, which softens the impact of any single program loss. The health business (medical exams and health IT) adds a non-defense leg that is tied to demographics and benefits processing rather than the defense budget cycle.
What are the risks to LDOS?
The overwhelming majority of Leidos revenue comes from the U.S. government, so budget delays, continuing resolutions, sequestration scenarios, and shifting administration priorities can directly pressure results. Contracts are frequently recompeted, and losing a large program or seeing an award protested can create lumpy revenue swings. Margins can be squeezed on fixed-price and cost-reimbursable work if execution slips or labor costs rise. The company also faces growing competition from both traditional peers and large commercial cloud and AI firms moving into federal work. Finally, its modest valuation reflects limited growth, so multiple expansion is not guaranteed even if execution stays solid.
How is LDOS valued? (as of April 2026)
Snapshot for LDOS as of July 2026, sourced from Yahoo Finance and may be delayed. Valuation figures move with price and earnings; verify the current numbers with your broker before deciding.
- Revenue (TTM): ~$17.5B
- FY2026 revenue guidance: ~$18.0B to $18.4B
- Latest quarter revenue: ~$4.4B (up ~4% YoY)
- Total backlog: ~$48B
- Market cap: ~$19B to $20B
- P/E (trailing): ~11x to 12x
In its most recent quarter (fiscal Q1 2026, ended early April 2026), Leidos posted about $4.4 billion in revenue, non-GAAP EPS of roughly $3.13, and adjusted EBITDA margin near 14%, and it raised full-year guidance. The stock trades at a low double-digit trailing P/E, a discount to the broader market that reflects its slow-growth, government-dependent profile. Figures are approximate and change with new filings and price moves.
How do you decide if LDOS is a buy?
Rather than asking whether LDOS is a buy in the abstract, it tends to help to answer four questions:
- Thesis: do you believe the case above, and is it still true today?
- Time horizon: a single stock can be volatile, so a longer horizon absorbs more of the swings.
- Position sizing: a thesis can be right and the sizing still wrong; decide how much of your portfolio one name should be.
- Overlap: check whether you already hold LDOS indirectly through an index or sector ETF before adding more.
For the full picture, see the LDOS stock guide (what the company does, the ETFs that hold it, similar stocks, and the themes it fits). In Walnut you can ask its AI about LDOS against your real portfolio and see your actual exposure before deciding.
The bottom line on LDOS
The bottom line: Leidos Holdings's story right now is Large backlog and revenue visibility, with revenue (ttm) at ~$17.5B. If you believe that narrative continues, the call is about sizing LDOS sensibly and checking overlap with what you own; if you doubt it (the risk: the overwhelming majority of Leidos revenue comes from the U.S.), it is not for you. Decide from the thesis, not the ticker. Walnut is not an investment adviser.
Build a basket around LDOS with Walnut
Use Leidos Holdings as one constituent in a thematic basket Walnut's AI helps you assemble. Describe a thesis you believe in, the AI proposes the holdings and weights, and you approve before any broker order.
FAQ
Is LDOS a good stock to buy right now?
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The case for Leidos Holdings right now is Large backlog and revenue visibility, with revenue (ttm) at ~$17.5B. If you believe that thesis holds, LDOS is a way to own it and the real questions are sizing and overlap, not timing; the main risk to that view is the overwhelming majority of Leidos revenue comes from the U.S. So it comes down to whether you believe the thesis. Walnut is not an investment adviser and this is not a recommendation.
What does Leidos Holdings do?
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Leidos Holdings is a large government services and technology contractor that builds and runs mission systems for U.S.
What are the main risks of LDOS?
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The overwhelming majority of Leidos revenue comes from the U.S. government, so budget delays, continuing resolutions, sequestration scenarios, and shifting administration priorities can directly pressure results. Contracts are frequently recompeted, and losing a large program or seeing an award protested can create lumpy revenue swings. Margins can be squeezed on fixed-price and cost-reimbursable work if execution slips or labor costs rise. The company also faces growing competition from both traditional peers and large commercial cloud and AI firms moving into federal work. Finally, its modest valuation reflects limited growth, so multiple expansion is not guaranteed even if execution stays solid.
What does Leidos do?
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Leidos is a government services and technology contractor. It builds and operates mission systems for U.S. federal agencies and allied governments across intelligence and digital modernization, cybersecurity, defense systems, homeland security screening, and health services such as medical exams and health IT.
Is LDOS a defense stock?
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It is often grouped with defense and government services stocks because most of its revenue comes from the U.S. government, including the Department of Defense and intelligence agencies. However, it also has meaningful civil and health work, so it is broader than a pure weapons or platform maker.
How does Leidos make money?
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Leidos earns revenue primarily through long-duration contracts with U.S. government agencies, structured as cost-reimbursable, time-and-materials, and fixed-price work. It recognizes revenue as it delivers services and systems, and it maintains a large multi-year backlog that provides forward visibility.
What is Leidos backlog and why does it matter?
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Backlog is the value of work Leidos has been awarded but not yet performed, recently around $48 billion. It matters because it gives investors visibility into future revenue and signals how successfully the company is winning and renewing contracts relative to work it completes.
Walnut is informational and is not an investment adviser. This page is educational and not a recommendation to buy or sell LDOS; figures are approximate and dated, and your own situation, time horizon, and risk tolerance should drive any decision. Verify current data before investing.