LIME ROCK
LIME ROCK is a Series C+, buyout, debt and other fund in the US, Canada, Europe and Middle East writing $50M–$250M checks into Healthcare, oil-and-gas, oilfield-services, renewable-energy, energy-efficiency and transportation-decarbonization.
- Stages
- Series C+, buyout, debt, other
- Sectors
- Healthcare, oil-and-gas, oilfield-services, renewable-energy, energy-efficiency, transportation-decarbonization
- Check size
- $50M–$250M
- Invests in
- US-wide, Canada, Europe, Middle East
- Actively investing
- Yes
- Founded
- 1998
- Assets under management
- $5.48B
- Website
- lrpartners.com
Thesis
Lime Rock is a private equity firm founded in 1998 and headquartered in Houston, Texas, with additional offices in Westport, Connecticut. As of December 31, 2025, the firm managed approximately $5.48 billion in client assets. Lime Rock operates through three distinct strategies: Lime Rock Partners, which focuses on private growth capital investments in the energy sector, specifically E&P and oilfield services, generally investing $50 million to $150 million in niche specialist companies across the U.S., Canada, Europe, and the Middle East; Lime Rock Resources, which acquires, operates, and improves lower-risk, mature oil and natural gas producing properties in North America with typical acquisitions ranging from $50 million to $250 million; and Lime Rock New Energy (LRNE), which invests in companies facilitating the transition to a lower-carbon economy, focusing on renewable generation, grid modernization, energy efficiency, and decarbonization of transportation. LRNE Fund II closed in April 2026 with $640 million. The firm emphasizes deep technical expertise with in-house petroleum engineers and geologists. Lime Rock Partners has received over $7.0 billion in capital commitments to its Partners strategy and $10.4 billion in total private capital commitments across all its funds. Lime Rock Resources funds have a capitalization of around $450 million.
Common questions
Does LIME ROCK invest at the Series C+ stage?
Yes. LIME ROCK lists Series C+, buyout, debt and other among the stages it invests in.
What check size does LIME ROCK write?
LIME ROCK writes $50M–$250M checks.
Where does LIME ROCK invest?
LIME ROCK invests in the US, Canada, Europe and Middle East.