While Tesla's recent stock movements have put autonomous vehicle technology back in the spotlight, savvy investors are discovering that the real opportunity may lie not with the automakers themselves, but with the specialized hardware suppliers powering the entire autonomous ecosystem. Three companies are emerging as critical players in this space, each offering exposure to the self-driving theme through different angles: semiconductor substrates for sensors, power and radar components, and defense-grade computing systems.

What Are the Hidden Players in Autonomous Vehicle Hardware?

Tesla's 7% share price decline following stronger-than-expected Q2 deliveries highlights a fundamental investor concern: much of the company's $1.6 trillion valuation depends on future autonomy and robotaxi potential rather than near-term sales performance. This volatility has created an opportunity to examine how other companies are building the foundational technology that autonomous vehicles require, regardless of which automaker ultimately dominates the market.

The autonomous vehicle supply chain extends far beyond software and vehicle platforms. It encompasses specialized manufacturers producing the physical components that enable self-driving capabilities. These suppliers operate in less crowded market segments, often serving multiple customers across different industries, which reduces their dependence on any single automaker's success or failure.

Which Hardware Suppliers Are Positioning Themselves for Growth?

Three companies stand out as particularly interesting for investors seeking exposure to autonomous vehicle technology without betting entirely on Tesla's autonomy narrative:

• Richardson Electronics (RELL): A US-based supplier generating approximately $34.5 million in revenue from custom display solutions and $29.7 million from green energy solutions, with a market capitalization of $241.8 million. The company supplies power, radiofrequency (RF) components, and display systems that sit behind sensors, radar, and high-voltage systems in autonomous and electrified vehicles.
• AXT (AXTI): A Fremont-based semiconductor manufacturer producing high-performance compound substrates including indium phosphide, gallium arsenide, and germanium. These materials form the foundation of chips used in data center optics, 5G networks, sensors, lidar, and autonomous vehicle systems. The company generates $95.9 million in annual revenue and has a market capitalization of $3.6 billion.
• Mercury Systems (MRCY): A US-based defense technology company generating $966.9 million in revenue from aerospace and defense applications. The company supplies high-performance computing, sensor, and electronic warfare hardware used in radar, electronic intelligence, and autonomous platforms, with a market capitalization of $7.6 billion.

Each of these companies offers a distinct pathway to autonomous vehicle exposure. Richardson Electronics provides the power management and display infrastructure that vehicles require. AXT supplies the semiconductor substrates that enable the sensors and lidar systems autonomous vehicles depend on for perception. Mercury Systems brings defense-grade computing and radar technology to the autonomy equation, drawing on decades of aerospace and defense experience.

How to Evaluate Hardware Suppliers in the Autonomous Vehicle Space

• Diversification Across Customers: Look for suppliers that serve multiple automakers and industries rather than relying on a single customer or platform. This reduces risk if one company's autonomous vehicle program faces delays or cancellation.
• Margin Expansion Potential: Identify companies where higher-margin products are gaining traction within their product mix. Richardson Electronics, for example, is expected to see faster earnings growth than revenue growth as premium products gain market share.
• Capacity Investment and Demand Signals: Companies investing heavily in production capacity, particularly for specialized materials like indium phosphide, signal confidence in future demand from autonomous vehicle and AI infrastructure customers.
• Balance Sheet Strength and Execution Risk: Evaluate whether companies have the financial discipline and operational execution to deliver on their growth projections, particularly those relying on project-based revenue or external financing.

The hardware supply chain for autonomous vehicles represents a different investment thesis than betting on a single automaker's self-driving success. These suppliers are building the foundational technology that will power autonomous systems across multiple platforms, industries, and geographies. Their success depends less on any individual company's autonomy timeline and more on the broader structural demand for advanced sensors, computing power, and vehicle electrification.

Richardson Electronics offers an earnings story where higher-margin products are shifting the business mix, though execution and balance sheet discipline remain critical. AXT provides exposure to the autonomy and AI buildout through its lidar, optics, and sensor substrates, though export permits and Chinese client concentration add execution risk. Mercury Systems brings a defense and aerospace perspective to the autonomy theme, with record bookings, a growing backlog, and improving margins suggesting that operational improvements are beginning to flow through the business.

As Tesla's stock volatility reminds investors that autonomy headlines can quickly reshape market expectations, these hardware suppliers represent a quieter but potentially more resilient way to gain exposure to the self-driving technology theme. Rather than betting on which company will win the robotaxi race, investors can focus on the companies building the essential components that every autonomous vehicle will require.