Brian Long leaves Atlantic Bridge to launch US technology fund
Brian Long, co-founder and managing partner of Atlantic Bridge, is leaving the growth equity firm to establish his own technology investment fund in the US. He said the new fund will focus on US-based technology investment opportunities.
- Brian Long is leaving Atlantic Bridge to establish a US technology fund.
- Atlantic Bridge has €1.4bn of assets under management.
- Long will remain a director of Navitas Semiconductor.
- He will continue as an advisory board member at SambaNova.
- Long led Atlantic Bridge’s investment in Elisity.
Departure from Atlantic Bridge
Long’s departure was announced on November 6, 2026. Atlantic Bridge, which has €1.4bn of assets under management, was founded in 2004, according to the statement.
Long said his time at the firm had been “some of the most rewarding and satisfying” of his career. He also thanked the investors who trusted Atlantic Bridge to manage their funds and the companies in which the firm invested.
“I am looking forward to devoting my efforts to a new fund focussed on US based technology investment opportunities,” Long said. He added that he would share details of the venture “in due course,” leaving its structure and investment plans unspecified for now.
Long will remain involved with portfolio companies
Although Long is leaving Atlantic Bridge, he said he would continue serving some portfolio companies as an advisor and board representative. He specifically confirmed that he will remain a director of Navitas Semiconductor.
Navitas Semiconductor realised a $4bn valuation at the IPO stage, according to Long’s statement. He will also remain a member of the advisory board of SambaNova, whose Series F round recently reached an $11 billion valuation. SambaNova is planning a NASDAQ IPO next year, the statement said.
Long also highlighted his role in leading Atlantic Bridge’s investment in Elisity. The company recently announced its sale to IonQ in an all-stock transaction valued at up to $1.3 billion.
What the move means for technology investing
Long’s planned fund will be focused on technology investment opportunities based in the US, giving his next venture a different stated remit from the broader Atlantic Bridge platform. The announcement does not provide a target size, launch date, fundraising details or information about prospective investments.
For Atlantic Bridge, the change marks the departure of a co-founder and managing partner after more than two decades since the firm was established. Speaking for Atlantic Bridge, Kevin Dillon said Long had achieved “very significant investment success” and created “meaningful opportunities” for the firm’s investors and partners.
Long’s continuing roles at Navitas Semiconductor, SambaNova and certain other companies mean that his relationship with parts of Atlantic Bridge’s investment network will continue, even as he develops a separate US technology fund.
