ABACON CAPITAL
Also known as ABACON CAPITAL GmbH, Abacon Capital, Büll Family Office
Hamburg investment company of the Albert Büll family office; invests across stages in public and private markets in energy transition, deep tech and real estate.
USEFUL FOR Founders · Business owners seeking a long-term partner · Co-investors
Hamburg investment company of the Albert Büll family. Not to be confused with Abac Capital (Barcelona private equity firm) or its Abac Nest Ventures arm.
Family & background
- FAMILY
- Büll (Albert Büll family)
- HEADQUARTERS
- Hamburg, Germany
- OUTSIDE CAPITAL
- No — own capital only
Investment approach
- GEOGRAPHY
- Europe
- STAGES
- SeedSeries AGrowthBuyout
- ROUTES
- Direct investments
- STRATEGIES
- Direct investmentsVenture capitalPrivate equityPublic equitiesReal estate
Overview
ABACON CAPITAL GmbH (Hamburg) describes itself as a family-owned investment firm focused on energy transition, deep tech and real estate, investing across all stages in public and private markets. The press describes it as the investment company (VC and PE arm) of the single family office of the Hamburg family of Albert Büll; Albert Büll's Encavis CV lists him as managing director of ABACON CAPITAL GmbH since 2002. It acted as a co-investor in the KKR-led takeover of Encavis in 2024 and has backed start-ups such as Miles Mobility and Co-Power.
Investment thesis
Family-owned investor across all stages in public and private markets, focused on energy transition, deep tech and real estate; in 2022 it said it would focus on clean energy, sustainable real estate, next-generation mobility, biotechnology and digital platforms.
Holdings & investments (3)
- Encavis AG (co-investor in KKR-led takeover)NOTABLEClimate & Energy · since 2024
- Co-PowerClimate & Energy · since 2025
- Miles MobilityMobility & Logistics
People
- Sven RossmannManaging Director (Geschäftsführer); CIO since January 2022 · source
- Nathalie Büll-TestorpManaging Director (Geschäftsführerin) · source
- Lukasz MichalskiManaging Director (Geschäftsführer) · source
- Albert BüllFounder; Managing Director of ABACON CAPITAL GmbH since 2002 (per his Encavis CV, Dec 2023) · source
- Tobias KraussHead of the Büll family office and Managing Director of ABACON (2022 press) · source
Classification
Single Family Office. Manages one family's own capital, with no outside investors. The family bears every loss. How family capital is classified →
FAQ
ABACON CAPITAL is a single family office based in Hamburg, Germany.
ABACON CAPITAL invests on behalf of the Büll (Albert Büll family) family.
ABACON CAPITAL invests directly in companies. Its stated asset mix includes direct investments, venture capital, private equity, public equities and real estate.
ABACON CAPITAL invests at Seed, Series A, Growth and Buyout stages in Climate & Energy, Deep Tech, Real Estate & PropTech and Mobility & Logistics.
Key people at ABACON CAPITAL include Nathalie Büll-Testorp (Managing Director (Geschäftsführerin)), Lukasz Michalski (Managing Director (Geschäftsführer)), Sven Rossmann (Managing Director (Geschäftsführer); CIO since January 2022) and Albert Büll (Founder; Managing Director of ABACON CAPITAL GmbH since 2002 (per his Encavis CV, Dec 2023)).
ABACON CAPITAL's holdings and investments include Encavis AG (co-investor in KKR-led takeover), Miles Mobility and Co-Power.
The most recent publicly reported investment by ABACON CAPITAL is Co-Power (Seed (€6.4m, led by Cherry Ventures; participation)), announced in Jun 2025.
No. ABACON CAPITAL invests its own capital and does not raise money from outside investors.