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LetterOne

letterone.com Direct investor

LetterOne is an international investment business founded in 2013 that makes large-scale, long-term investments through four units: L1 Energy, L1 Technology, L1 Health and L1 Retail. It takes minority holdings or full ownership and works actively with management teams.

LetterOne is a private equity firm headquartered in Strassen, Luxembourg, founded in 2013. It invests directly in companies, from growth to buyout, in energy, telecoms and technology, health and retail. More than £20bn of patient capital under management, as it reports.

“We invest in sectors fundamental to society’s sustainable prosperity: energy, technology, health and retail.”

— LetterOne, own website
Layer
Direct investor
Type
Private equity
Stage
Growth – Buyout
Headquarters
Strassen, Luxembourg
Sectors
energy, telecoms and technology, health, retail
Founded
2013
Assets under management
more than £20bn of patient capital

Team, as LetterOne publishes it

  • Jonathan Muir Chief Executive Officer
  • Stephen Gillespie Group General Counsel
  • Josh Hardie Corporate Affairs Director
  • Jonathan Tubb Group Chief Financial Officer/Chief of Staff
  • Ed Williams Managing Director and Operating Partner
  • Nitin Bhandari Chief Investment Officer – L1 Treasury
  • Michael Casey Managing Partner - L1 Impact
  • Stefan Linn Managing Partner and CEO - L1 Health
  • Milan Makwana Chief People Officer
  • Tim Summers Managing Partner - L1 Energy
  • Rahul Mukim Partner and Head of India

Names and roles exactly as listed on letterone.com. Nothing else about these people is recorded.

Where this comes from

Every fact above was read from a page LetterOne publishes itself. Nothing is taken from third-party databases. Investment activity (deals, co-investors) is not yet recorded.

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Record 15270 · added 2026-10-20 · link last verified 2026-10-21 · confidence high

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