SES AI Corp (SES-WT)

SES AI Corp (NASDAQ: SES; warrants: SES.WS and SES-WT) is a Boston-based battery technology company founded in 2012 that develops and manufactures lithium-metal battery cells for electric vehicles and energy storage applications. The company combines materials science expertise with artificial intelligence to discover and optimize electrolytes and other critical battery components, with the goal of delivering higher energy density, faster charging, longer cycle life, and lower cost than conventional lithium-ion cells.

The warrant securities (SES-WT) represent call options issued alongside the company’s equity during its SPAC merger and public listing, giving holders the right to purchase SES common shares at a fixed strike price. Warrant investors are betting that the underlying shares will appreciate, providing leveraged exposure to SES’s commercialization progress.

The lithium-metal cell and its promise

Lithium-metal batteries replace the graphite anode of traditional lithium-ion cells with a thin sheet of metallic lithium, which can store significantly more charge per unit of mass. This geometry allows the cell to pack more energy density into the same physical footprint—a critical advantage for electric vehicles, where weight and range are paramount, and for portable electronics where volume is constrained. The physics is simple; the engineering is ferociously difficult.

The core challenge that has stalled lithium-metal adoption for three decades is stability. Lithium metal is extremely reactive, and the interface between the metal anode and the electrolyte (the chemical medium through which ions flow) degrades rapidly through repeated charging cycles, causing the cell to lose capacity or fail suddenly. Early lithium-metal cells suffered short cycle life, high manufacturing defect rates, and fire risk, making them unsuitable for mass production. SES’s strategic bet is that AI-driven materials discovery can find new electrolyte chemistries that stabilize the anode-electrolyte interface and permit lithium-metal cells to be manufactured at automotive scale and cost.

Commercialization and the timing wager

SES announced the successful completion of key safety tests for its 100 mPOWER lithium-metal B-sample cells against China’s GB38031-2020 Electric Vehicles Traction Battery Safety Standard, a milestone that must precede any adoption by Chinese automakers. The company expects commercialization to begin in earnest during 2025, with initial production focused on urban air mobility (drones and eVTOL aircraft) and specialized automotive applications where the energy-density premium justifies higher cost.

The company’s capacity roadmap targets 10 GWh of annual production by the end of 2025, scaling to 80 GWh by 2027 and 100 GWh by 2028. If executed, this ramp would position SES as a major supplier to the global electric vehicle industry. However, capacity targets are routinely missed in battery manufacturing—tool yield, supply-chain bottlenecks, and customer adoption delays are endemic. SES booked USD 2 million in revenue in Q4 2024 and guided to USD 15–25 million for 2025, figures that suggest early commercialization is underway but remain far from the scale the company has targeted.

AI and materials discovery

SES employs AI not merely as a marketing term but as a core R&D lever. The company built a “Molecular Universe” database and partnered with NVIDIA to computationally screen millions of candidate electrolyte and binder chemistries, reducing the time and cost of discovering new formulations from years of lab work to weeks of simulation. This approach has yielded the new electrolyte material that powers its latest 2170 cylindrical cell unveiled at CES 2025.

The practical value of AI-accelerated discovery lies in the iterative cycle: find a candidate material, test it, incorporate learnings back into the model, repeat. In a technology race where competitors are also scrambling to stabilize lithium-metal, speed of iteration can determine who reaches manufacturing scale first. SES’s advantage is not permanent—any rival with enough capital can license similar tools—but it has been a meaningful differentiator during the critical early years of commercialization.

Market and partnership landscape

SES has secured supply agreements with major customers, including a notable partnership with SoftBank’s battery division. The company is also expanding manufacturing geographically: it operates facilities in Boston, Singapore, Shanghai, and Seoul, with recent emphasis on South Korea and China, where it has completed a dedicated production line in Chungju focused on urban air mobility cells.

The broader market for lithium-metal batteries depends on two cyclical forces: EV demand, which is sensitive to consumer purchasing power, oil prices, and government subsidies; and automotive cost pressures, which cycle with industry utilization rates and margin compression during downturns. A recession that dampens EV sales also delays automotive investment in next-generation battery technology, creating a financing and adoption risk for SES. Conversely, periods of high oil prices and strong EV demand can trigger rapid adoption of any technology that can deliver range at cost-competitive prices.

Manufacturing and supply risk

Lithium-metal cells are manufactured on dedicated lines that require significant capital investment. SES has partnerships with other manufacturers for some production, including a joint venture with Hisun New Energy Materials for electrolyte production, which reduces supply risk on a critical feedstock but introduces dependency on a partner’s execution. The company acquired UZ Energy in September 2025 to boost energy storage system sales and broaden its addressable market beyond vehicle batteries.

Raw material costs—lithium, cobalt, nickel—fluctuate sharply with global commodity markets, and any significant shortage of lithium or supply disruption in key geographies (Australia, Chile, China, Congo) would ripple through SES’s cost structure. The company’s ability to defend margins in a commodity downturn is untested, since meaningful production volumes have only just begun.

How to research SES

Investors interested in SES should start with the company’s quarterly and annual filings (SEC CIK 0001819142) and management guidance on production ramps and customer wins. Track announced partnerships and supply agreements—they signal validation from established OEMs and reveal the company’s beachhead in commercial production. Watch for manufacturing yield rates, a metric often disclosed in investor presentations; cell yield below 90% is a red flag that the technology is not yet mature enough for cost-effective production.

The warrant investors should also understand the warrant terms: strike price, expiration date, and early-exercise features. Warrants expire on November 12, 2026, meaning warrant holders have a defined window to assess whether SES will successfully commercialize at scale or face extended delays. The leverage of a warrant makes it attractive to speculative investors betting on rapid share appreciation, but it also concentrates risk if commercialization stumbles or the company requires additional capital raises that dilute existing shareholders.