Weights & Biases IPO status, timeline, valuation and S-1 filing tracker. Last updated July 2026.
| Industry | Artificial Intelligence |
| Stage | Series E |
| IPO Status | Pre-IPO |
| Valuation | $1.25B |
| Total Funding | $550M |
| Headquarters | San Francisco, CA |
| IPO Readiness Score | 75/100 |
| Founded | 2017 |
Track Weights & Biases IPO status, valuation updates, and S-1 filing milestones on TechStackIPO. Last updated July 2026.
Weights & Biases (W&B) is the machine learning experimentation platform enabling data scientists to track experiments, evaluate models, compare results, and collaborate on AI development. Valued at $1.25B with $200M raised, W&B has 1M+ users and serves research teams at Google, OpenAI, Anthropic, and Salesforce. Major AI infrastructure IPO candidate competing with MLflow and Neptune.ai in the $30B+ MLops market.
Weights & Biases is in the pre-IPO phase as of July 2026. With an IPO readiness score of 75/100, the company ranks among the more IPO-ready companies in the Artificial Intelligence sector. Pre-IPO companies at this stage typically evaluate market conditions, complete board appointments, and engage underwriters before initiating the formal S-1 filing process.
Weights & Biases is valued at $1.25B based on the most recent private market data. The company has raised a total of $550M in funding. Private market valuations are determined by the latest funding round and may differ from eventual IPO pricing, which reflects public market conditions, investor demand, and comparable company multiples at the time of listing.
Funding rounds from seed through latest — Series A, B, C and beyond.
| Round | Date | Amount | Valuation | Lead Investor(s) |
|---|---|---|---|---|
| Seed | Sep 2017 | $4M | $20M | Trinity Ventures |
| Series A | Aug 2019 | $15M | $100M | Felicis Ventures |
| Series B | Apr 2021 | $45M | $475M | Insight Partners, Coatue |
| Series C | Oct 2021 | $135M | $1.25B | NEA, Insight Partners |
Total funding raised: $550M
Bear / base / bull scenarios based on current private market valuation and comparable IPO multiples.
| Scenario | Est. Valuation | Basis |
|---|---|---|
| Bear | $3.1B | Compressed multiples, delayed listing |
| Base | $1.25B | Last private round valuation |
| Bull | $5.9B | Strong market, premium AI/tech multiple |
Estimates are illustrative. Not investment advice. All figures based on publicly available data.
Weights & Biases has an IPO readiness score of 75/100 on TechStackIPO. A high readiness score suggests IPO activity could occur within the next 1–2 years.
Weights & Biases's last known private valuation is $1.25B. IPO valuations typically reflect current market conditions at time of listing and may differ from private market valuations.
Pre-IPO access options may include: (1) secondary market platforms such as Forge Global or EquityZen that facilitate private share sales, (2) ETFs holding pre-IPO companies or venture portfolios, and (3) direct secondary share purchases if eligible as an accredited investor. TechStackIPO tracks availability but does not facilitate investments.
No. Weights & Biases has not yet filed an S-1 registration statement with the SEC as of TechStackIPO's latest data update.
Weights & Biases operates in the Artificial Intelligence sector. TechStackIPO tracks multiple Artificial Intelligence companies from seed through IPO, including their funding rounds, valuations, and IPO readiness scores. You can compare Weights & Biases against other Artificial Intelligence companies using TechStackIPO's comparison tool.
Weights & Biases is at the Series E stage. The company has raised a total of $550M in funding. Companies at this funding stage are typically scaling operations, expanding market share, and evaluating public market timing.
Weights & Biases is headquartered in San Francisco, CA. The company's location can influence IPO exchange selection, regulatory requirements, and investor interest. Companies headquartered in major tech hubs often benefit from proximity to venture capital networks and talent pools.