Bolt Threads is a biomaterials company developing sustainable fibers and silk-inspired ingredients for apparel and beauty. It is best known for lab-grown silk and mycelium-based alternatives to conventional materials.
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Bolt Threads shares are not on public exchanges. UpMarket provides accredited investors access through secondary market transactions.
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| Date | Round | PPS (split-adj.) | Valuation |
|---|---|---|---|
| Aug 2024 | Business Combination / IPO |
Bolt Projects Holdings reported Q3 2025 revenue of $0.4 million, up 7,300% year over year. Gross margin improved to 16% from 5% in Q2 2025, indicating early operating leverage.
Bolt Threads is known for engineering proteins using fermentation to create biomaterials for apparel and beauty applications. Its platform spans spider-silk-inspired materials and mycelium-based ingredients, creating know-how across multiple product lines.
The company’s website states that Bolt Threads is no longer operating and directs questions to a liquidation-related email address. This shutdown status raises execution and continuity risk for any investment thesis.
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No. As of March 2026, Bolt Threads is a private company and does not trade on any public stock exchange. Accredited investors can access Bolt Threads shares through UpMarket, a FINRA-registered broker-dealer that specializes in pre-IPO investments.
Bolt Threads does not have a public stock price because it is privately held. The most recent known share price comes from its last funding round. Pre-IPO share prices on the secondary market may differ from the last round price depending on supply, demand, and market conditions.
Yes. Accredited investors can indicate interest in Bolt Threads shares through UpMarket by filling out the form on this page or creating an account at upmarket.co. All pre-IPO offerings are subject to availability and require a $50,000 minimum investment. UpMarket is a FINRA-registered broker-dealer and has brokered alternative investments since 2019.
Pre-IPO investments carry significant risks. Bolt Threads shares are illiquid, meaning there is no public market to sell them quickly. There is no guaranteed exit timeline or return. The investment is speculative in nature, and investors should be prepared for the possibility of total loss. Valuations of private companies can fluctuate substantially between funding rounds. Investors should consult their financial advisor and review all offering documents before investing.
In a pre-IPO transaction, accredited investors purchase shares from existing shareholders (such as employees, early investors, or other holders) through secondary market platforms. The company itself does not issue new shares in these transactions. UpMarket facilitates these trades as a FINRA-registered broker-dealer, handling compliance, documentation, and settlement on behalf of both parties.
There are two primary exit paths for pre-IPO holdings: selling your shares on the secondary market to another buyer, or holding until the company completes an IPO or is acquired. Both paths are subject to transfer restrictions, company approval (right of first refusal), and market conditions. The timing of any exit is unpredictable, and investors should plan for a multi-year holding period.
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UpMarket's valuation estimate of is derived from a proprietary model that incorporates multiple data sources: funding round data (Caplight), revenue estimates (Sacra), secondary market pricing, and public company comparables. The model applies a private company discount to the public comp multiple to account for illiquidity and information asymmetry. This estimate is not investment advice and may differ substantially from the price at which shares actually trade.
Bolt Threads develops sustainable fibers and silk-inspired ingredients for apparel and beauty, generating $34.2M in 2025 revenue; Q3 2025 revenue rose to $0.4M on 7,300% YoY growth — accredited investors can access Bolt Threads stock through UpMarket.