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How does Panthalassa’s $140M stack up? Here are the largest Oregon startup funding rounds covered on Silicon Florist

I have a habit of forgetting things. Especially big things. The kind of things that you’d think should be hard to forget. Like nine-figure funding rounds. But that, kids, is why I write things down. So when Panthalassa raised $140 million today, it got me thinking — how does that actually stack up against the largest rounds I’ve covered on Silicon Florist over the years…?

Time for a stroll down memory lane. (For my benefit as much as yours, frankly. Because I could definitely use a refresher.) Here are some of the biggest Oregon rounds I’ve covered, ranked by amount:

  1. Vacasa $319M (Oct 2019)
  2. Agility Robotics $150M Series B (Apr 2022)
  3. Panthalassa $140M Series B (May 2026)
  4. Vacasa $103.5M Series B (Oct 2017)
  5. Hydrolix $80M (Apr 2025)
  6. Conductor One $79M (Oct 2025)
  7. SheerID $64M (Nov 2019)
  8. Anitian $55M (Jan 2022)
  9. Crescendo $50M (Oct 2024)
  10. Torq $50M (Dec 2021)
  11. Eclypsium $45M Series C (Jan 2025)
  12. Act-On $42M (Apr 2014)
  13. Puppet Labs $40M (Jun 2014)
  14. Boulder Care $36M Series B (Jun 2022)
  15. Boulder Care $35M Series C (May 2024)

Honorable mentions — the ones in the next tier that you should also know about:

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