Gray Swan raises $40M series a
Announced 28 May 2026
◆ The Round
Gray Swan raised $40M in series a funding, announced on 28 May 2026, led by Wing Venture Capital, Madrona, with participation from Obvious Ventures, Snowflake Ventures, Hudson River Trading, Samsung Next, Magarac Venture Partners. The round is tracked live by Fusion42 as part of the Raise fund database and the Scout startup database.
◆ About Gray Swan
AI security startup that builds tools to safety-test AI models and agents for vulnerabilities. Gray Swan is based in United States and currently at series a stage, operating in Cybersecurity, Enterprise Software.
◆ Investors
LeadWing Venture Capital, Madrona
ParticipationObvious Ventures, Snowflake Ventures, Hudson River Trading, Samsung Next, Magarac Venture Partners
◆ Market context
This funding event is a citable node in Fusion42's market graph: it links Gray Swan's Scout profile to the funds behind the round and to related Wire analysis, and is refreshed from public announcements as the round is confirmed or extended. It is the same live market data Arthur reasons over when benchmarking a founder's own raise against what is closing in the market right now.
◆ Explore the market
◆ FAQ
How much did Gray Swan raise?
Gray Swan raised $40M in its series-a round, announced 2026-05-28.
Who invested in Gray Swan's series-a round?
The round was led by Wing Venture Capital and Madrona, with participation from Obvious Ventures, Snowflake Ventures, Hudson River Trading, Samsung Next and Magarac Venture Partners.
What does Gray Swan do?
AI security startup that builds tools to safety-test AI models and agents for vulnerabilities.
Verified 28 May 2026 · Sources: public filings