Boeing vs. Lockheed Martin: Which Aerospace Stock to Buy?

Evaluating Aerospace and Defense Stocks

Choosing between Boeing Co (BA) and Lockheed Martin Corp (LMT) involves weighing a high-growth turnaround story against a steady, reliable defense incumbent in an increasingly complex global security environment. Investors looking at Boeing stock 2026 must evaluate the firm's massive commercial rebound, while Lockheed Martin stock offers a different profile centered on defense-heavy cash flow. Both companies play critical roles in national security and global infrastructure, making them frequent candidates for comparison in aerospace and defense stocks portfolios.

The Boeing Commercial Turnaround

Boeing operates as a massive global aerospace entity that builds commercial airplanes, defense systems, and space technologies. The company sells its products to commercial airlines and government agencies in over 150 countries. In FY 2025, revenue reached approximately $89.5 billion, a 34.5% increase from the prior year. The company reported net income of roughly $2.2 billion for the period. This resulted in a net margin of about 2.5%, a notable improvement from the negative margin reported in the previous fiscal year.

However, the company faces significant operational hurdles. As of its December 2025 balance sheet, the debt-to-equity ratio was nearly 10x, indicating that total liabilities are 10 times shareholder equity. Boeing is currently working to integrate Spirit AeroSystems, a move finalized in December 2025 that carries execution risks and potential unforeseen expenses. While some analysts view the Spirit acquisition as a strategic synergy, others argue it functions as a costly bailout, with recent disclosures suggesting Boeing inherited $1.9 billion in unexpected liabilities and below-market contracts.

The Lockheed Martin Defense Model

Lockheed Martin is a pure-play defense technology company organized into segments for aeronautics, missiles, and space. Its primary customer is the U.S. government, which accounted for roughly 72% of consolidated sales in FY 2025. In FY 2025, revenue reached approximately $75.1 billion, representing growth of 5.7% over the previous year. The F-35 program remains its most vital asset, representing approximately 27% of its total revenue.

While revenue growth is slower than its competitor, the company has maintained a consistent history of profitability. Free cash flow was a healthy $6.9 billion. This strong cash generation allows the company to support its dividend and share repurchase programs. Despite this stability, the firm faces a $4.25 billion federal lawsuit filed by SDR Group in March 2026 regarding the alleged misappropriation of a hybrid airship business model. Furthermore, ethical investing groups and ESG advocates have criticized the company for its role in manufacturing weapons used in global conflicts.

Technical Analysis: Recovery and Certification

Boeing faces ongoing scrutiny and certification hurdles for its 777X and 737 MAX 10 programs from the FAA (Federal Aviation Administration), which dictate the company's ability to fulfill its commercial backlog. This mirrors the historical precedent of the 2019-2021 737 MAX grounding, which led to a slow, multi-year recovery process. In contrast, Lockheed Martin's primary risk involves the F-35 program and potential budget cuts, reminiscent of the 2023-2024 software integration delays that temporarily halted deliveries. While Boeing's recovery is driven by commercial demand, Lockheed's valuation is anchored by long-term defense contracts that extend into the 2040s.

What Comes Next: Certification and Litigation

Investors are tracking several milestones through 2027. The FAA is expected to finalize certification for Boeing's 777X and 737 MAX 10 programs between 2026 and 2027. Simultaneously, the U.S. District Court for the Eastern District of Virginia is expected to move toward a resolution for the SDR Group's $4.25 billion hybrid airship lawsuit against Lockheed Martin in late 2026 or 2027. These events represent critical decision points for both firms' forward-looking financial guidance.

Why This Matters for Investors

For investors, the contrast between LMT vs BA signals a choice between value and recovery-oriented growth. Lockheed Martin offers a more conservatively valued option based on future earnings estimates, supported by a $194 billion backlog. Boeing, meanwhile, trades at a premium as it attempts to restore production stability following the Spirit AeroSystems integration. The ultimate decision rests on whether an investor prioritizes the consistent, defense-funded cash flow of Lockheed Martin or the long-term potential of Boeing's commercial aviation dominance.