SpaceX vs. Lockheed Martin: Which Aerospace Stock Is a Better Buy in 2026?

Choosing between Lockheed Martin Corp (NYSE:LMT) and Space Exploration Technologies Corp (NASDAQ:SPCX) involves balancing the reliability of a legacy defense leader against the high growth potential of a modern space innovator.

Lockheed Martin provides stable government contracts and dividends, whereas Space Exploration Technologies focuses on disrupting satellite connectivity and launch costs. Investors must decide whether they prefer established profitability or aggressive expansion.

The case for Lockheed Martin

Lockheed Martin operates as a premier global aerospace and defense provider, focusing on high-tech aeronautics, missiles, and fire control. In its latest annual report, filed for FY 2025, the company noted that the U.S. government accounted for nearly 72% of its total consolidated sales. Customer concentration like this adds a layer of risk to the business, particularly with the F-35 Lightning II program representing approximately 27% of its total revenue. This reliance makes the company a staple among defense stocks, as it manages critical logistics and specialized support for military operations worldwide.

In FY 2025, revenue reached roughly $75 billion, representing a year over year growth rate of close to 6%. The company reported net income of approximately $5 billion, which resulted in a net margin of nearly 7%. While revenue has climbed steadily since 2023, the net margin has compressed slightly from the 10.2% seen two years prior. This trend highlights the impact of rising operational costs even as the company expands its backlog of government orders.

As of its December 2025 balance sheet, the debt-to-equity ratio stands at roughly 3.2x. This ratio compares total debt to shareholder equity, helping you understand how much a company relies on borrowed money. The current ratio, which measures the ability to pay short-term debts with assets that can be converted to cash quickly, is approximately 1.1x. For the fiscal year, free cash flow reached nearly $6.9 billion. Free cash flow is the cash remaining after a business pays for its operations and capital investments, providing the funds needed for dividends and share repurchases.

The case for Space Exploration Technologies

Space Exploration Technologies, or SpaceX as it is commonly known, has transformed the aerospace industry through its focus on reusable rocket technology and the Starlink broadband network. The company reported approximately 10.3 million Starlink subscribers as of March 31, 2026, providing internet connectivity in over 160 markets globally. By reducing the cost of reaching orbit, the company has secured a leading position in the commercial launch market. Its strategy involves utilizing its own launch capabilities to build out a massive satellite constellation, creating a recurring revenue stream alongside its traditional launch services.

In FY 2025, the company generated nearly $18.7 billion in revenue, marking an impressive growth rate of roughly 33% compared to the previous year. Despite this top-line expansion, the company reported a net loss of approximately $4.9 billion, resulting in a negative net margin of 26.4%. This performance illustrates the capital-intensive nature of its current expansion phase. While revenue is growing much faster than that of its peers, the costs of deploying thousands of satellites and developing new launch vehicles remain high.

As of its December 2025 balance sheet, the company carries a debt-to-equity ratio of close to 0.6x. Its current ratio is approximately 1.4x, suggesting a healthy liquidity position for its immediate obligations. However, free cash flow for the year was negative $14 billion, reflecting heavy investment in infrastructure. Note that stock-based compensation (SBC) represented roughly 29% of operating cash flow, which inflates reported cash generation since SBC is a non-cash expense added back in the cash flow statement.

Risk profile comparison

Lockheed Martin faces significant risks regarding its revenue concentration, as any shift in U.S. congressional appropriations or government spending priorities could hurt its financial outlook. The F-35 program is particularly critical, as any performance issues or funding reductions from international partners would impact nearly a third of the company's sales. Additionally, the company is managing a $4.25 billion federal lawsuit filed by SDR Group in March 2026, which alleges the misappropriation of intellectual property. Supply chain vulnerabilities also persist, especially for critical semiconductors and rare earth minerals required for advanced defense systems.

Space Exploration Technologies operates in an industry with extreme capital requirements and intense competition from established giants like Boeing Co (NYSE:BA) and RTX Corp (NYSE:RTX). The technical risks of rocket launches mean a single failure can lead to significant delays and lost revenue. Furthermore, the company must continue to navigate complex international regulations to expand its Starlink service. Unlike its larger competitors such as Northrop Grumman Corp (NYSE:NOC), General Dynamics Corp (NYSE:GD), or L3Harris Technologies Corp (NYSE:LHX), the company is currently prioritizing market share and infrastructure over immediate net income, which may lead to continued volatility.

Valuation comparison

Lockheed Martin appears much cheaper based on earnings, while the other company trades at a massive premium due to its high growth and negative cash flow.

Valuation metrics include sourcing from Financial Modeling Prep (FMP) and may differ from other data providers.

The Forward P/E uses future earnings estimates to value a stock, whereas the P/S ratio measures a company's market value against its sales over the past twelve months.

Which stock would I buy in 2026?

SpaceX's various businesses intend to leverage the company's core launch capabilities, starting with reusable rockets. The ability to reuse boosters significantly lowers per-launch costs and spreads fixed manufacturing costs across multiple missions. Expectations are that scaling up quickly will happen, with Wall Street analysts projecting $39 billion in sales for fiscal 2026, a much lower net loss of around $1.6 billion, and profitability in 2027.

The lack of free cash flow appears to be crushing; projections indicate free cash flow will be negative $28 billion this year, then jump to negative $67 billion in 2027.

Still, the success of Tesla Inc (NASDAQ:TSLA) has made founder Elon Musk the richest man in the world and raised expectations that he can make an even greater fortune from SpaceX. The business certainly has market support behind it, raising the world's largest IPO, $85.7 billion this year.

Space has a very real business in Starlink, which mitigates the possibility that grander plans won't come to fruition.

Lockheed Martin Corp is a core company in the middle of one of the biggest priorities in the U.S.: aerospace and defense. In particular, the F-35 fighter program remains a pillar of Lockheed's business, with the Defense Department planning to continue to buy the jet into the 2040s. Having more than a quarter of revenue essentially guaranteed for 15 years or more is unheard of and quite appealing to a long-term investor. Lockheed Martin's sales are anticipated to grow about 5% to $79.1 billion in the current fiscal year.

The war in Iran and rising threats from Russia and China mean the defense industry will be a priority for the U.S. for years to come. As strange as it may sound, SpaceX doesn't have a monopoly on anything it does -- there is a nimble competitor in every business, from cellular networks in space to space launches to delivering payloads into orbit.

With Lockheed Martin, investors get a good company at a good price and a near-guarantee that the business will thrive through fulfilling the needs of the Pentagon for years to come.

Brendan Coffey has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Boeing, L3Harris Technologies, Lockheed Martin, RTX, and Tesla. The Motley Fool recommends Northrop Grumman. The Motley Fool has a disclosure policy.