10 Best Solid State Battery Stocks to Watch in 2026: Companies, Technology & Growth Potential
Solid-state batteries are one of the most closely watched developments in the next generation of energy storage. Unlike conventional lithium-ion batteries, solid-state batteries use a solid electrolyte instead of a liquid or gel electrolyte. This technology could potentially improve energy density, charging speed, safety, and battery life.
As investment interest in advanced batteries continues to grow, investors are also looking for solid state battery stocks that could benefit from the technology’s development.
However, choosing solid-state battery stocks is not as simple as finding companies that manufacture batteries. Some companies are developing solid-state cells directly, while others are working on materials, manufacturing technology, automotive partnerships, or battery production.
In this guide, we look at 10 solid state battery stocks and publicly traded companies with meaningful exposure to solid-state battery technology in 2026. We will also explain their technology, commercialization progress, potential opportunities, and risks.
Important: This article is for educational purposes only and is not financial advice. Solid-state battery technology is still developing, and some companies discussed below may face significant technical, manufacturing, financial, or commercialization risks.
Table of Content
- What Are Solid State Battery Stocks?
- Why Are Solid-State Batteries Important in 2026?
- 10 Solid State Battery Stocks to Watch in 2026
- Solid State Battery Stocks: Pure-Play vs Large Companies
- Which Solid State Battery Stock Has the Most Potential?
- Solid-State Battery Stocks vs Traditional Battery Stocks
- Are Solid-State Batteries Commercially Available in 2026?
- What Should Investors Watch in Solid State Battery Stocks in 2026?
- Risks of Investing in Solid State Battery Stocks
- Solid State Battery Stocks FAQs
- Final Thoughts on Solid State Battery Stocks
What Are Solid State Battery Stocks?
Solid state battery stocks are publicly traded companies that have a significant connection to the development, manufacturing, materials, or commercialization of solid-state battery technology.
There are two important categories to understand.
Pure-Play Solid-State Battery Stocks
These companies focus heavily on solid-state battery technology.
Examples include:
- QuantumScape (NASDAQ: QS)
- Solid Power (NASDAQ: SLDP)
These companies can offer investors more direct exposure to solid-state battery development, but they can also carry higher risk because their commercial success depends heavily on technology development and manufacturing scale-up.
Large Companies With Solid-State Battery Exposure
Other companies have large existing businesses but are investing heavily in advanced battery technology.
These include:
- Toyota
- Panasonic Holdings
- Samsung SDI
- CATL
- LG Energy Solution
- Honda
- Nissan
For these companies, solid-state batteries are only one part of a much larger business.
This distinction is important because not every company associated with solid-state batteries is a pure solid-state battery stock.
Why Are Solid-State Batteries Important in 2026?
The battery industry is looking for ways to overcome some of the limitations of conventional lithium-ion technology.
A solid electrolyte could potentially provide several advantages:
- Higher energy density
- Improved safety
- Faster charging
- Better thermal stability
- Longer battery life
- Greater design flexibility
- Potentially better performance for electric vehicles
The technology is attracting significant investment from battery manufacturers, automakers, startups, and material suppliers.
According to TrendForce, the global solid-state battery sector recorded more than $1.3 billion in disclosed financing between 2025 and the first quarter of 2026, while the industry entered a critical engineering-validation and pre-commercialization phase.
That does not mean solid-state batteries are already replacing lithium-ion batteries. Instead, 2026 is an important development and scale-up year.
10 Solid State Battery Stocks to Watch in 2026
Here are 10 publicly traded companies that investors may want to research when looking at the solid-state battery industry.
| Company | Ticker | Solid-State Exposure | Investor Profile |
|---|---|---|---|
| QuantumScape | QS | Very High | Pure-play technology developer |
| Solid Power | SLDP | Very High | Pure-play developer |
| Toyota Motor | TM | High | Automaker + battery development |
| Panasonic Holdings | PCRFY / 6752 | High | Major battery manufacturer |
| Samsung SDI | 006400.KS | High | Battery manufacturer |
| CATL | 300750.SZ | High | Large battery manufacturer |
| LG Energy Solution | 373220.KS | High | Battery manufacturer |
| Honda Motor | HMC / 7267.T | Medium-High | Automotive + battery development |
| Nissan Motor | NSANY / 7201.T | Medium-High | Automotive + solid-state program |
| SK Innovation | 096770.KS | Medium | Battery and energy company |
Note: Stock listings and tickers can vary by exchange. Always verify the current listing and financial information before making an investment decision.
1. QuantumScape (NASDAQ: QS)
QuantumScape is one of the most recognizable names among pure-play solid-state battery companies.
The company is developing lithium-metal solid-state battery technology with the goal of improving energy density, charging performance, and safety compared with conventional lithium-ion batteries.
QuantumScape is particularly interesting to investors because it provides relatively direct exposure to solid-state battery development rather than being primarily an automaker or diversified battery manufacturer.
In June 2026, QuantumScape announced a multi-year joint research agreement with Honda R&D to advance its solid-state battery technology and related manufacturing processes. Honda had previously completed a technology evaluation of QuantumScape’s platform.
QuantumScape’s investor relations page also lists its second-quarter 2026 results and ongoing development activities.
Why Investors Watch QuantumScape
Potential advantages include:
- Direct exposure to solid-state battery technology
- Lithium-metal battery development
- Automotive partnerships
- Strong industry visibility
- Potential applications beyond passenger vehicles
Main Risk
QuantumScape remains a technology-development company rather than an established mass-market battery manufacturer. Turning laboratory and pilot-scale performance into profitable high-volume production is a major challenge.
Bottom line: QuantumScape is one of the most direct solid state battery stocks to watch, but its higher potential comes with higher technology and commercialization risk.
2. Solid Power (NASDAQ: SLDP)
Solid Power is another major pure-play solid-state battery developer.
The company is developing sulfide-based solid electrolyte technology and has worked with major automotive and battery-industry partners.
Its business model is also different from companies that plan to manufacture complete batteries at massive scale. Solid Power has emphasized developing and supplying solid electrolyte materials while licensing cell designs and manufacturing processes.
In 2026, Solid Power continued progress on its pilot manufacturing infrastructure. Its second-quarter update said installation of major equipment for its continuous electrolyte manufacturing pilot line was progressing, with plant validation and operational startup planned for the fourth quarter of 2026.
The company also reported ongoing work with Samsung SDI and BMW and previously completed a line installation agreement with SK On.
Why Investors Watch Solid Power
- Pure-play solid-state exposure
- Sulfide electrolyte technology
- Relationships with major automotive and battery companies
- Progress toward pilot-scale production
- Potential licensing and electrolyte business model
Main Risk
Solid Power is still working toward commercial scale. Its financial results show the risks of investing in an early-stage battery technology company, including operating losses and significant research and development spending.
Bottom line: SLDP is one of the most direct solid state battery stocks, but investors should closely monitor manufacturing milestones, partnerships, cash usage, and commercialization progress.
3. Toyota Motor (NYSE: TM)
Toyota is not a pure-play solid-state battery stock. However, it is one of the world’s largest automakers and has invested heavily in next-generation battery technology.
Toyota has been working on solid-state batteries for years, with a particular focus on developing batteries that could provide greater energy density and faster charging for electric vehicles.
The company’s scale is one of its biggest advantages.
Unlike a small battery startup, Toyota already has:
- Global manufacturing operations
- Automotive production expertise
- Large research and development resources
- Established supply chains
- Global vehicle distribution
Toyota has also worked with Idemitsu Kosan on solid electrolyte development and commercialization.
Why Investors Watch Toyota
Toyota offers a different type of solid-state exposure.
Instead of betting the entire investment thesis on one battery technology, investors are buying a diversified global automaker that is also pursuing solid-state batteries.
Main Risk
Solid-state battery development may take longer or cost more than expected. Toyota also competes in a rapidly changing EV market where conventional lithium-ion, LFP, hybrid, and other battery technologies continue to improve.
Bottom line: Toyota may appeal to investors who want solid-state battery exposure without investing in a pure-play battery startup.
4. Panasonic Holdings
Panasonic Holdings is another major company to watch in advanced battery technology.
Panasonic has extensive experience manufacturing lithium-ion batteries and has strong relationships within the automotive battery industry.
Its scale and manufacturing expertise could become important if solid-state batteries move from pilot production to large-scale commercial manufacturing.
Why Investors Watch Panasonic
- Long history in battery manufacturing
- Automotive battery expertise
- Advanced battery research
- Global manufacturing capabilities
- Established relationships with major technology and automotive companies
Main Risk
Solid-state battery technology represents only one part of Panasonic’s overall business. Therefore, its stock performance will not necessarily track the solid-state battery industry.
Bottom line: Panasonic is better viewed as a diversified battery and technology company with solid-state potential rather than a pure-play solid-state investment.
5. Samsung SDI
Samsung SDI is one of the major battery manufacturers pursuing next-generation battery technology.
The company is particularly relevant to solid-state battery investors because it has been working on all-solid-state battery development and has relationships with companies involved in the solid-state ecosystem.
Samsung SDI’s large manufacturing base and experience with advanced battery cells give it an important potential advantage if solid-state technology reaches mass production.
Solid Power also reported in 2026 that it continued work with Samsung SDI and BMW under a joint evaluation agreement involving solid-state battery development.
Why Investors Watch Samsung SDI
- Major battery manufacturer
- Advanced battery R&D
- Automotive industry relationships
- Solid-state battery development
- Large-scale manufacturing experience
Main Risk
Samsung SDI operates across a much broader battery business, so its stock is affected by EV demand, conventional battery prices, competition, raw material costs, and other factors.
Bottom line: Samsung SDI is an important company for investors researching the broader solid-state battery supply chain.
6. CATL
Contemporary Amperex Technology Co. Limited, commonly known as CATL, is one of the world’s largest battery manufacturers.
CATL is important to the solid-state battery discussion because of its enormous battery manufacturing capabilities and investment in next-generation battery technologies.
However, investors should understand that CATL’s business is much broader than solid-state batteries.
Its existing business includes conventional lithium-ion battery technologies and other advanced battery solutions.
Why Investors Watch CATL
- Huge global battery manufacturing scale
- Strong EV industry relationships
- Significant research and development capabilities
- Ability to potentially scale new battery technologies
- Large global customer base
Main Risk
Solid-state batteries are not currently the core of CATL’s business. Therefore, buying CATL stock is not the same as investing directly in a pure-play solid-state battery company.
Bottom line: CATL could be an interesting long-term company to watch as solid-state technology becomes more commercially viable.
7. LG Energy Solution
LG Energy Solution is another major global battery manufacturer with significant interest in next-generation battery technology.
The company supplies batteries to major automotive customers and has extensive experience in lithium-ion cell manufacturing.
Its scale could be a major advantage if solid-state battery production eventually reaches large commercial volumes.
Why Investors Watch LG Energy Solution
- Global battery manufacturing experience
- Automotive customer relationships
- Advanced battery research
- Large production capabilities
- Strong position in the global EV battery market
Main Risk
The company faces competition from CATL, Samsung SDI, Panasonic, SK On, and other battery manufacturers.
Solid-state battery commercialization may also take longer than expected.
Bottom line: LG Energy Solution is best viewed as a diversified battery company with exposure to future solid-state technology.
8. Honda Motor
Honda is another automaker worth watching because of its involvement in next-generation battery development.
The company is pursuing its own solid-state battery roadmap while also collaborating with technology developers.
Honda’s 2026 agreement with QuantumScape is particularly relevant. The agreement includes a multi-year research program focused on advancing QuantumScape’s battery platform and manufacturing processes.
Why Investors Watch Honda
- Major global automaker
- Solid-state battery research
- Technology partnerships
- Potential future EV applications
- Existing global manufacturing infrastructure
Main Risk
Honda’s overall stock performance depends on much more than solid-state batteries.
Bottom line: Honda is an example of a large automaker that could benefit if solid-state technology becomes commercially successful.
9. Nissan Motor
Nissan has also been researching all-solid-state battery technology as part of its long-term electric vehicle strategy.
The company has experience with electric vehicles through the Nissan Leaf and has therefore been involved in battery technology for years.
Its solid-state battery efforts are aimed at improving the performance and economics of future EVs.
Why Investors Watch Nissan
- Long EV experience
- Solid-state battery research
- Automotive manufacturing scale
- Potential future EV applications
Main Risk
Nissan faces intense competition in the global EV market, while solid-state technology itself remains under development.
Bottom line: Nissan can provide indirect exposure to solid-state battery development through the future EV market.
10. SK Innovation
SK Innovation is another company worth monitoring because of its involvement in batteries and advanced energy technologies.
Its battery business, SK On, has worked with companies developing next-generation battery technologies.
Solid Power, for example, completed a line installation agreement with SK On and continued collaboration around pilot manufacturing activities.
Why Investors Watch SK Innovation
- Battery industry exposure
- Automotive relationships
- Advanced battery partnerships
- Manufacturing experience
- Exposure to the wider EV battery market
Main Risk
SK Innovation is a diversified company, so solid-state batteries represent only part of the overall investment story.
Bottom line: SK Innovation is more suitable for investors looking for broader battery-industry exposure rather than a pure solid-state battery bet.
Solid State Battery Stocks: Pure-Play vs Large Companies
One of the biggest mistakes investors can make is treating every solid-state battery company as the same.
The risk profile can be very different.
Pure-Play Companies
QuantumScape and Solid Power offer more direct exposure to solid-state battery technology.
Their potential upside can be significant if their technologies reach successful commercial production.
However, they also face higher risks related to:
- Manufacturing scale
- Funding
- Technology validation
- Production costs
- Customer adoption
- Commercial timelines
Large Diversified Companies
Companies such as Toyota, CATL, Samsung SDI, Panasonic, and LG Energy Solution have established businesses.
They may be less dependent on solid-state technology becoming successful.
However, solid-state batteries may have a smaller effect on their overall valuation.
Which Solid State Battery Stock Has the Most Potential?
There is no single answer because the “best” stock depends on what type of exposure an investor wants.
For Direct Solid-State Exposure
QuantumScape and Solid Power are among the most relevant companies to research.
They are much more directly connected to solid-state battery development than diversified automakers.
For Lower Technology Concentration
Large companies such as Toyota, Panasonic, CATL, Samsung SDI, and LG Energy Solution provide broader business exposure.
If solid-state commercialization takes longer than expected, their existing businesses may provide more diversification than a pure-play startup.
For Automotive Exposure
Toyota, Honda, and Nissan offer another way to participate in the potential growth of solid-state batteries through future electric vehicles.
The key point is that higher potential does not automatically mean lower risk.
Solid-State Battery Stocks vs Traditional Battery Stocks
Solid-state batteries are not automatically better investments than conventional battery companies.
Traditional lithium-ion batteries already have:
- Established manufacturing
- Large production capacity
- Existing EV demand
- Proven supply chains
- Commercial applications
Solid-state batteries, on the other hand, are still moving toward large-scale commercialization.
This creates a classic investment trade-off:
Traditional battery companies = more mature business
Pure-play solid-state developers = potentially higher growth but higher risk
Investors should therefore evaluate the company’s complete business rather than looking only at the words “solid-state battery.”
Are Solid-State Batteries Commercially Available in 2026?
The answer depends on what is meant by “commercially available.”
Solid-state battery technology exists in prototypes, pilot production, testing programs, and limited applications. However, the industry has not yet reached the same mass-production scale as conventional lithium-ion batteries.
TrendForce described 2026 as a critical period of engineering validation and progress toward pre-commercialization for the global solid-state battery industry.
This is why investors should pay attention to production milestones, not just announcements.
A company announcing a new solid-state battery prototype is very different from a company demonstrating:
- Stable cell performance
- High manufacturing yield
- Long cycle life
- Competitive production cost
- Automotive qualification
- Mass-production capability
- Reliable customer demand
What Should Investors Watch in Solid State Battery Stocks in 2026?
If you are researching solid state battery stocks, don’t focus only on the stock price.
Instead, watch these important indicators.
1. Manufacturing Progress
Can the company move from laboratory cells to pilot production and eventually mass production?
Manufacturing scale is one of the biggest challenges facing solid-state batteries.
2. Battery Performance
Look for independently meaningful improvements in:
- Energy density
- Charging speed
- Cycle life
- Safety
- Operating temperature
Investors should also understand how solid-state batteries compare with conventional lithium-ion solar batteries in terms of safety, lifespan, energy density, and cost.
3. Automotive Partnerships
Partnerships with major automakers can provide an important validation signal.
QuantumScape’s 2026 agreement with Honda is an example of how technology developers can work with major automotive companies to advance commercialization.
4. Production Cost
A battery can perform extremely well but still fail commercially if it is too expensive to manufacture.
5. Cash and Funding
Early-stage battery companies can require significant capital before generating meaningful commercial revenue.
This is especially important when researching pure-play stocks.
6. Customer Validation
Watch whether companies move from laboratory testing to real customer qualification and production agreements.
7. Commercialization Timeline
Investors should be skeptical of overly aggressive timelines.
A company moving steadily through pilot production can be more meaningful than a company repeatedly announcing future plans without measurable manufacturing progress.
Risks of Investing in Solid State Battery Stocks
Solid-state battery stocks can be exciting, but they also carry significant risks.
Technology Risk
A promising laboratory result does not guarantee successful mass production.
Manufacturing Risk
Producing thousands or millions of identical cells with consistent performance can be extremely difficult.
Financial Risk
Some early-stage battery companies spend heavily on research and development before generating meaningful revenue.
For example, Solid Power reported a net loss of $23.8 million in the second quarter of 2026, despite maintaining substantial liquidity.
Competition
Companies are competing against each other while conventional lithium-ion technology is also improving.
Commercialization Risk
Solid-state batteries may take longer to reach mass-market EVs than investors currently expect.
Stock Volatility
Pure-play battery developers can experience large stock-price movements based on partnerships, test results, financing, production updates, or market sentiment.
Solid State Battery Stocks: What Could Drive Growth?
Several trends could support the industry over the coming years.
Electric Vehicles
EV manufacturers are looking for batteries that can provide longer range and faster charging.
Energy Storage
Advanced battery technologies may eventually find applications beyond electric cars.
Aerospace and Aviation
High energy density is particularly valuable where weight matters.
Robotics and Drones
Smaller, lighter batteries with high energy density could potentially improve operating time.
Consumer Electronics
Solid-state technology may eventually find applications in smaller electronic devices if manufacturing economics become attractive.
However, these opportunities depend on successful commercialization.
Solid State Battery Stocks FAQs
What are the best solid state battery stocks in 2026?
QuantumScape and Solid Power are among the most direct publicly traded pure-play solid-state battery companies. Toyota, Panasonic, Samsung SDI, CATL, and LG Energy Solution provide broader exposure through their battery and automotive businesses.
There is no universally “best” stock because each company has a different level of solid-state exposure and risk.
Which companies are developing solid-state batteries?
Companies involved in solid-state battery development include QuantumScape, Solid Power, Toyota, Samsung SDI, Panasonic, CATL, LG Energy Solution, Honda, Nissan, and other battery manufacturers and technology companies.
Is QuantumScape a solid-state battery stock?
Yes. QuantumScape is one of the most direct publicly traded companies focused on solid-state lithium-metal battery technology. The company continues to work toward commercializing its technology and announced a multi-year research agreement with Honda in 2026.
Is Solid Power a solid-state battery stock?
Yes. Solid Power trades on Nasdaq under the ticker SLDP and is developing solid-state battery technology, particularly sulfide-based solid electrolyte materials. In 2026, the company continued developing its pilot manufacturing capabilities and working with industry partners.
Are solid-state batteries commercially available in 2026?
Solid-state batteries are available in development, prototype, testing, and pilot-production stages, but large-scale mass commercialization remains a major industry challenge. The global industry is still progressing through engineering validation and pre-commercialization.
What is the difference between solid-state and lithium-ion batteries?
The main difference is the electrolyte.
Traditional lithium-ion batteries generally use a liquid or gel electrolyte, while solid-state batteries use a solid electrolyte.
Solid-state technology could potentially offer higher energy density and improved safety, but manufacturing complexity and cost remain important challenges.
Are solid-state battery stocks risky?
Yes. Particularly for pure-play companies, risks can include technology failure, production delays, funding requirements, competition, customer adoption, and stock-price volatility.
Investors should research a company’s financial position, technology, partnerships, manufacturing progress, and commercialization strategy before making an investment decision.
Final Thoughts on Solid State Battery Stocks
The solid-state battery industry is entering an important stage in 2026.
The technology has attracted major automakers, battery manufacturers, startups, and investors because of its potential to improve the performance of next-generation energy storage.
However, the industry is still developing.
For investors, the most important question is not simply:
“Which company has the best solid-state battery?”
A better question is:
“Which company has the strongest combination of technology, manufacturing capability, financial resources, partnerships, and a realistic path to commercialization?”
Pure-play companies such as QuantumScape and Solid Power provide more direct solid-state battery exposure, but they also carry higher technology and commercialization risk.
Larger companies such as Toyota, CATL, Samsung SDI, Panasonic, and LG Energy Solution offer broader business exposure while continuing to participate in next-generation battery development.
As solid-state batteries move closer to commercial production, investors should watch manufacturing milestones, customer validation, battery performance, production costs, funding, and commercialization timelines.
The companies that successfully turn promising solid-state technology into reliable, affordable, mass-produced batteries may ultimately become the most important players in the next generation of energy storage.
In short, solid state battery stocks could offer long-term opportunities, but they should be researched as emerging technology investments rather than guaranteed winners.
