SineWave Ventures is a U.S. venture capital firm based in Arlington, Virginia (Washington, D.C. metropolitan area, Northern Virginia), investing in enterprise-technology sectors with a particular focus on companies serving national-security, government, defence, and dual-use government-and-commercial customers. The firm was founded by Tony Surtees and Co-Founders with deep backgrounds in U.S. national-security / government-services technology sectors. SineWave operates as a Washington-D.C.-area GovTech / defence-technology specialist investor in the broader U.S. national-security / defence-tech / GovTech investment ecosystem alongside firms such as Razor's Edge Ventures (covered earlier), Shield Capital, Lux Capital, and Andreessen Horowitz's American Dynamism practice. Detailed aggregate current-fund AUM, fund vintages, and comprehensive portfolio-company disclosures are partially documented in mainstream financial-industry databases for this specific URL. The row should be noted as Active aEUR" note the old description's leading ''f '' character is a source-data error / typographical artifact.