Fernando Martinelli is a Portuguese entrepreneur and angel investor best known as the co-founder and CEO of Balancer Labs, the team behind the Balancer Protocol – a programmable liquidity and automated market maker (AMM) built on Ethereum. He emerged as one of the key builders in decentralised finance (DeFi) during the 2019–2020 wave of AMM infrastructure, and his operator background informs his approach as an early-stage investor.
Martinelli began work on Balancer in 2018 while at the BlockScience research consultancy, where the core ideas around generalised weighted liquidity pools took shape. Balancer Protocol launched its V1 mainnet in March 2020 and quickly attracted attention for allowing up to eight tokens per pool with custom weightings – a departure from the 50/50 model pioneered by Uniswap. In 2020, Balancer Labs raised a $3 million seed round led by Placeholder VC, with participation from Accomplice and others. A later Series A of $24.25 million followed in 2021, bringing additional institutional backing. The BAL governance token launched in June 2020.
As an angel investor, Martinelli focuses on early-stage DeFi infrastructure and adjacent tooling. His operator experience – scaling a live AMM protocol to billions in total value locked – gives him a practical lens on liquidity design, token economics, and smart contract risk. His portfolio of seven investments, while not exhaustively disclosed in public filings, reflects a bias toward Ethereum-ecosystem projects and DeFi primitives rather than consumer applications or centralised exchanges.
Notable investments
- Balancer Protocol – co-founded and remains active as CEO; the protocol has processed hundreds of billions in cumulative volume across its V1, V2, and V3 releases.
- Public information on his specific angel portfolio companies is limited. No comprehensive deal list has been disclosed through Crunchbase or public filings as of early 2026.
Team
Martinelli co-founded Balancer Labs with Mike McDonald, who serves as CTO and wrote much of the initial protocol code. Both came out of the BlockScience environment. Martinelli's own background spans software engineering and financial systems; he previously worked at companies in Brazil before relocating to Europe. As a solo angel, he does not operate a formal fund structure with named partners.
Recent activity
Through 2024 and into 2025, Martinelli remained focused on Balancer's V3 architecture launch, which restructured how liquidity hooks and custom AMM logic are composed. He has been a vocal participant in governance forums and on-chain debates around fee structures and veBAL tokenomics. His angel activity during this period has not been publicly announced through standard channels. Geographic focus appears weighted toward Europe and the broader Ethereum developer ecosystem.
Public information about the specific names, sizes, and outcomes of his angel investments beyond Balancer itself is limited. Investors seeking his portfolio details should consult his LinkedIn profile or direct outreach. His track record as an operator – building a top-tier AMM from a whitepaper to a multi-billion-dollar protocol – is the primary signal available to those evaluating him as a co-investor or advisor.
