Atlantic Bridge Co-Founder Launches US Deep-Tech Fund
Brian Long's departure from the transatlantic investor points to a planned US-only vehicle, with terms not yet disclosed.
Updated on Nov. 6, 2026 in Startups
Brian Long, co-founder of venture capital firm Atlantic Bridge, announced in a statement that he is leaving the firm, where he is a managing partner. He is establishing a new technology fund focused on the US, with details to be shared in due course.
Why it matters
The departure of a co-founder from a European deep-tech investor signals a shift in capital focus toward the United States. Long's move suggests that transatlantic deep-tech investing is becoming a more competitive and specialized field, with founders building US-specific vehicles.
Atlantic Bridge reports €1.4bn in assets under management and around 120 portfolio companies across its European and US deep-tech investments. The source does not disclose the fund size, portfolio performance or investment pace of the planned US vehicle.
The players
Atlantic Bridge
A venture capital firm founded in 2004 that invests in European, UK and US deep-tech companies, with a portfolio including Equal1, SambaNova and Neurent Medical.
Brian Long
Co-founder and managing partner of Atlantic Bridge, who previously founded and led Parthus-Ceva Technologies and founded GloNav Inc.
Parthus-Ceva Technologies
A semiconductor intellectual property company that Long founded and led as CEO from 1993 to 2003.
The details
Atlantic Bridge invests in deep-tech companies, meaning firms built on advanced scientific or engineering research rather than consumer software. The firm operates offices in Dublin, London, Munich, Paris and Palo Alto, California, which gives it a presence across Europe and the US West Coast. Long, who lives and works in Palo Alto, previously founded and led Parthus-Ceva Technologies from 1993 to 2003 and founded GloNav Inc.
Timeline
2004: Atlantic Bridge is founded.
1980: Long graduates from Trinity College with a master's degree.
1993 to 2003: Long leads Parthus-Ceva Technologies as founder and CEO.
November 6, 2026: Long's departure from Atlantic Bridge is announced.
The Tech Race
Atlantic Bridge's model of investing in deep-tech companies across Europe, the UK and the US positions it among firms competing for early-stage capital in advanced technology. Long's planned US-only fund would concentrate that effort on a single market where the firm already has a Palo Alto office.
The new US-focused fund has no announced size, launch date or investment terms, so founders seeking US deep-tech backing cannot yet apply or plan around it. Founders and investors working across Atlantic Bridge's European and US markets should watch for details on fund size and strategy before assuming any change in access to capital.
The takeaway
Long's move points to a trend of deep-tech investors splitting their strategies by region as US-focused funds grow. Watch for the announced fund's size, strategy and first investments, which will show whether it marks a broader shift in transatlantic venture capital.
Further reading
For more on how founders and investors are reshaping the startup landscape, explore the Startups section.
Source note: This article includes information reported by Silicon Republic.
