Charles Bonnassleux
Investment Director
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- Full Name
- Charles Bonnassieux
- Title
- Partner *(formerly Director / Investment Director at Cathay Capital)*
- Firm
- Keensight Capital *(previously Cathay Capital)*
- Firm Type
- Growth Buyout / Private Equity (not an angel investor)
- Investment Stage
- Growth equity / minority & majority buyouts of profitable, growing companies (not seed)
- Check Size
- Keensight targets companies with revenues of roughly €10M–€400M; firm manages c. €5.5bn AUM
- Target Company Profile
- Fast-growing, profitable companies with proven business models seeking capital, strategic guidance and operational support
- Sector Focus
- Technology (software) and Healthcare
- Geographic Focus
- Europe (with international expansion support)
- Location
- Paris, France
Background
Charles Bonnassieux is a Partner at Keensight Capital, a European growth-buyout investor specializing in Technology and Healthcare, with more than 25 years of history and roughly €5.5bn of assets under management. He was promoted to the partnership in Keensight's 2025 leadership round, with managing partner Jean-Michel Beghin noting he was "particularly delighted to welcome Charles" alongside two other new partners. The firm has credited his expertise with helping build partnerships with leading European technology and healthcare companies.
Before Keensight, Bonnassieux spent approximately nine years at Cathay Capital, the Franco-Chinese global private equity and venture capital platform, where he held the role of Director (Investment Director). At Cathay he worked on buyout and growth investments, including the firm's backing of the Paris-based niche fragrance brand Juliette Has A Gun. Cathay Capital invests across buyout, growth and venture stages and has completed 160+ investments globally.
He began his career at Motion Equity Partners, a European private equity fund, before moving into the Cathay platform. Bonnassieux holds a Master's degree and an MBA, both from ESSEC Business School in France.
Note: the original stub described him as an "Angel Investor" making "Seed Round" investments. Available primary sources do not support this — his entire career has been in institutional private equity / growth-buyout investing, not angel/seed.
Investment Thesis & Focus
- Invests as a growth-buyout / growth-equity investor in profitable, fast-growing companies, not early-stage startups.
- Sector concentration in software/technology and healthcare, the two verticals Keensight is built around.
- Targets companies generating roughly €10M–€400M in revenue, taking minority or majority stakes and providing capital plus operational and international-expansion support.
- Thesis emphasizes backing strong management teams with "a clear vision and a best-in-class product" and "strong foundations for future growth" (his words on the Decision Focus deal), then accelerating growth organically and via add-on acquisitions and AI-enabled product expansion.
Notable Investments
- Decision Focus (Sept 2025) — Keensight acquired a majority stake in this Denmark-based no-code Governance, Risk & Compliance (GRC) software company; Bonnassieux is the named/quoted partner leading the firm's support.
- Advancis (Nov 2024) — Keensight partnered with this global security-management software provider; cited as a consistently, profitably growing company that Bonnassieux supported.
- Juliette Has A Gun — Paris-based niche fragrance brand backed during his time at Cathay Capital to support international development.
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