Weights & Biases is an AI developer platform for building, tracking, and managing AI applications and machine learning models. It serves teams working on LLMOps and MLOps workflows and is used by companies such as OpenAI, NVIDIA, and Cohere.
UpMarket does not offer Weights & Biases shares. This page covers Weights & Biases's history before the acquisition.
Weights & Biases was acquired by CoreWeave in May 2025 and no longer has shares of its own. UpMarket does not offer Weights & Biases shares. This page covers Weights & Biases's valuation and funding history before the acquisition.
Weights & Biases was acquired by CoreWeave in May 2025.
See how Weights & Biases's private-market valuation changed across funding rounds before the acquisition.
See reported funding rounds and revenue figures on this page, with their sources.
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| Date | Round | PPS (split-adj.) | Valuation |
|---|---|---|---|
| May 2025 | Acquired by CoreWeave | ||
| Undisclosed |
A report on W&B’s August 2023 financing said the company had reached 700,000 users and then raised $50 million at about a $1.25 billion valuation. The same report described W&B as an AI tooling and MLOps platform for managing machine-learning models.
Weights & Biases described itself as the leading developer-first MLOps platform when it raised its Series C at a $1 billion valuation. Its earlier Series B announcement said the funding would expand the product beyond experiment tracking into dataset versioning and model management.
W&B’s company blog said it raised $135 million in Series C funding and that the round valued the company at $1 billion. The post said the capital would continue building its developer-first MLOps platform.
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No. Weights & Biases was acquired by CoreWeave in May 2025 and no longer has shares of its own. UpMarket does not offer Weights & Biases shares.
Weights & Biases has no stock price of its own since its acquisition by CoreWeave. The prices shown on this page are historical private-market prices from before the acquisition.
No. Weights & Biases was acquired by CoreWeave and UpMarket does not offer Weights & Biases shares. Accredited investors interested in companies that have not yet gone public can review UpMarket's current pre-IPO offerings.
Weights & Biases is no longer an independent company, so its shares are not available to buy. This page is kept for its historical funding and valuation data. UpMarket does not offer Weights & Biases shares.
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.
Weights & Biases was acquired by CoreWeave in May 2025. What former shareholders received, cash or shares of the buyer, was set by the terms of the acquisition.
UpMarket does not offer Weights & Biases shares. The minimum for most pre-IPO offerings on UpMarket is $50,000.
Weights & Biases's last valuation was set by its acquisition by CoreWeave. The figures on this page show its valuation history before the acquisition.
Weights & Biases provides an AI developer platform for building, tracking, and managing LLMOps and MLOps workflows, reached 700K users before a $50M round and generated $13.6M in 2024 revenue. Weights & Biases is now part of CoreWeave, and UpMarket does not offer its shares.