Ocean surveillance startup Quartermaster raises $140M Series B

Arlington-based Quartermaster closed a $140 million Series B, with $100 million in equity from Insight Partners and Overmatch Ventures and $40 million in debt from Stifel. Its SmartMast sensor package is deployed on over 650 vessels across 25 countries, with more than 800 units shipped.

• $140M Series B: $100M equity plus $40M debt facility
• Each SmartMast records tens of gigabytes of data per day
• Deployed on 650+ vessels in 25 countries, 800+ shipped
• Startup doubled manufacturing capacity to meet demand