Brian Long leaves Atlantic Bridge in a move that could reshape part of the transatlantic venture capital landscape. The veteran Irish technology investor, entrepreneur and Atlantic Bridge cofounder is stepping away from the growth equity firm to establish a new US-focused tech fund, signaling a fresh chapter for one of Ireland’s best-known figures in deep technology investing.
Long’s departure is notable not just because of his long history with Atlantic Bridge, but because it highlights the continued pull of US-based technology investment opportunities. With decades of experience spanning semiconductor innovation, public markets and venture investing, Long is entering a highly competitive but potentially rewarding segment of the market at a time when investors are watching AI, chips, enterprise software and infrastructure startups closely.
Brian Long leaves Atlantic Bridge after more than two decades of influence
Atlantic Bridge said Long has played a major role in the firm since its founding in 2004. Over the years, the company built a strong reputation as a growth equity investor backing deep technology businesses across Europe, the UK and the US.
As Brian Long leaves Atlantic Bridge, he does so after helping develop a sizable investment platform. The firm says it has:
- $1.4 billion in assets under management
- About 120 portfolio companies
- 35 portfolio realisations
- International offices in Dublin, London, Munich, Paris and Palo Alto
That footprint reflects Atlantic Bridge’s cross-border strategy, particularly in sectors where technical expertise and global scaling support are essential. Long has been closely associated with that approach, especially in semiconductors and other advanced technology fields.
Why his new US tech fund matters
The fact that Brian Long leaves Atlantic Bridge to create a new investment vehicle in the United States is significant for founders, limited partners and the broader tech ecosystem. A dedicated US tech fund led by someone with Long’s background suggests confidence in the next wave of American innovation, especially in high-growth, capital-intensive sectors.
While specific details of the new fund have not yet been disclosed, the strategy appears likely to center on US-based technology opportunities. That could include areas such as:
- Semiconductors and chip design
- Artificial intelligence infrastructure
- Enterprise networking and security
- Cloud and compute platforms
- Deep tech companies with global commercial potential
Investors will be watching to see whether Long’s new fund targets early-stage startups, growth-stage companies or a blend of both. Given his track record, any move into the US venture capital market is likely to attract attention from institutional investors looking for specialist exposure to frontier technologies.
Brian Long’s track record in technology and investing
One reason this news stands out is Long’s unusual combination of operating and investing experience. Before becoming known as a venture investor, he built his reputation as a technology entrepreneur. He founded and led Parthus Technologies, the Irish semiconductor intellectual property company that later became Ceva and achieved listings in London and New York.
His earlier career also included engineering and executive roles at Bell Labs AT&T and Digital Equipment Corporation, giving him hands-on technical and commercial experience. That background has long differentiated him in a venture capital industry where deep domain expertise can be a major advantage.
Notable portfolio connections
Even as Brian Long leaves Atlantic Bridge, he indicated he will continue to advise or represent certain companies. These include:
- Navitas Semiconductor, which reached a multibillion-dollar valuation at IPO stage
- SambaNova, an AI infrastructure company that has achieved a reported $11 billion valuation in recent fundraising
- Elisity, whose sale to IonQ in an all-stock deal valued at up to $1.3 billion marks another important liquidity event
These associations reinforce Long’s position at the intersection of semiconductors, AI and next-generation enterprise technology.
What this means for Atlantic Bridge
Whenever a high-profile founder departs an established investment firm, questions naturally follow. In this case, Atlantic Bridge remains a substantial growth equity player with an international network and an established portfolio. The firm publicly praised Long’s contribution, and the transition appears amicable.
Still, Brian Long leaves Atlantic Bridge at a moment when specialist investors are increasingly valuable. Deep tech investing depends on technical judgment, patient capital and strong market timing. Long’s exit may prompt industry watchers to consider how Atlantic Bridge evolves its leadership profile and sector strategy from here.
The bigger picture for Irish and global tech investment
There is also a broader story behind the headline that Brian Long leaves Atlantic Bridge. It underscores how interconnected the Irish, European and US technology ecosystems have become. Irish-founded investors and entrepreneurs are no longer confined to local or regional markets; they are active participants in global capital formation, especially in sectors such as semiconductors, AI and advanced computing.
For startup founders, the move is another reminder that experienced capital is flowing toward companies with defensible technology and international growth potential. For limited partners, it points to ongoing appetite for managers who can bridge engineering insight with venture discipline.
Long, a Trinity College Dublin graduate and former EY Entrepreneur of the Year, brings brand recognition as well as industry credibility. Those qualities could help him stand out as he launches a new fund in a crowded US investment market.
Conclusion
Brian Long leaves Atlantic Bridge with a rare blend of founder experience, deep tech knowledge and venture capital success behind him. His planned US tech fund could become an important new vehicle for backing high-potential American technology companies, particularly in sectors where technical depth matters most. The key takeaway is simple: this is more than an executive departure—it is a strategic bet on the future of US technology investing from one of Ireland’s most accomplished tech financiers.
