#United States #Boston #J2 Ventures #Brookhaven Fund #dual-use technology

J2 Ventures Raises $250 Million for Tech Innovations

On November 11, 2025, J2 Ventures, a veteran-led venture capital firm based in Boston, announced the closing of its $250 million Brookhaven Fund. This fund has garnered substantial interest and is significantly oversubscribed, featuring notable limited partners including JP Morgan, MetLife, and the State Investment Council of New Mexico. The Brookhaven Fund is critically focused on advancing technologies that are vital for America’s national security and economic competitiveness.

In recent years, there has been a surge of interest in dual-use innovations, which have applications in both defense and civilian sectors. As national priorities shift toward greater technological readiness and resilience, the Brookhaven Fund aims to fuel early-stage investments in firms that develop groundbreaking technologies.

According to Alex Harstrick, Managing Partner and Co-Founder of J2 Ventures, historical examples illustrate the profound impact of initial collaborations between governmental needs and private sector ingenuity. Innovations like Oracle and Cisco emerged from such synergies, highlighting how urgency in addressing national challenges can lead to phenomenal technological advancement.

Bridging the Gap

J2 Ventures recognizes the critical need to bridge the gap between advanced technologies and marketable solutions. The firm focuses on several key areas, including advanced computing, cybersecurity, communication infrastructure, artificial intelligence, and healthcare—particularly in remote physiological monitoring. Jonathan Bronson, PhD, Managing Partner and Co-Founder, emphasizes that by empowering founders with the necessary insight and financial backing, groundbreaking innovations can transition from development stages to global markets.

J2 Ventures has established a record of supporting over 35 companies that apply critical capabilities in health, infrastructure, and security. The firm’s unique approach combines commercial discipline with a strong network within the defense and intelligence sectors, enabling startups to attract non-dilutive funding. On average, J2-backed companies manage to secure $2 in non-dilutive funding for every $1 invested by the firm.

Powerful Partnerships

With a team rich in diverse expertise, J2 Ventures combines knowledge from national security, science, entrepreneurship, and public policy to evaluate innovative technologies effectively. The leadership team includes experienced figures, such as Dr. Matt Goldman and Master Chief (ret.) Adam Briley, who are crucial in navigating regulatory landscapes and enhancing founding teams’ capabilities.

The Brookhaven Fund showcases the firm's commitment to long-term performance and the advancement of societal interests, as demonstrated by its nearly zero turnover rate among limited partners. Notably, this fund is J2's third consecutive oversubscribed endeavor, reinforcing confidence in the venture’s performance.

The Future of Innovation

As J2 Ventures continues to innovate in dual-use investments, it remains committed to creating scalable solutions that serve both commercial and national security interests. Advisors from various sectors, including military and healthcare, contribute insights to ensure the fund meets its mission

In summary, J2 Ventures is poised to influence not only the tech landscape but also the broader socio-economic framework through its emphasis on essential advancements that interplay with security and everyday life. The Brookhaven Fund embodies the firm's efforts to foster environments where critical technologies can thrive and transform systems for broader societal benefits.