Old Ironsides Energy is a private equity firm. Team members are concentrated in Boston, Massachusetts, United States. Known portfolio companies include Cavalcade Midstream, Caerus Oil and Gas, Laredo Energy and Moray Energy, 4 companies in all.
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Investment focus
- Stage
- Late-Stage
- Sector
- Climate
- Focus
- Energy Private EquityMidstreamOil & Gas
Contacts
Who to pitch at Old Ironsides Energy
Old Ironsides Energy portfolio companies (4)
- Cavalcade Midstream
- Caerus Oil and Gas
- Laredo Energy
- Moray Energy
Co-investors
Funds that share portfolio companies with Old Ironsides Energy.
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About Old Ironsides Energy
The firm's listing covers sector Climate, and focus areas Energy Private Equity, Midstream and Oil & Gas; known deals cluster at Late-Stage.
The contacts to approach at Old Ironsides Energy are Sean O'Neill (Founder and Managing Partner) and Edward Joullian (Managing Director).
Old Ironsides Energy shares portfolio companies with 5 other investment firms, among them Pearl Energy Investments, NGP and Anschutz Investment.
Frequently asked questions
What is Old Ironsides Energy?
Old Ironsides Energy is a private equity firm whose team is concentrated in Boston, Massachusetts, United States, with a known portfolio of 4 companies. The portfolio comes from public investment records rather than from the firm, so deals that never surfaced publicly are not in it.
What does Old Ironsides Energy invest in?
Listed sectors include Climate; listed focus areas include Energy Private Equity, Midstream and Oil & Gas. Those tags come from the portfolio attached to the firm, so they describe what has been backed rather than a stated mandate for what comes next.
What stage does Old Ironsides Energy invest at?
The known deals of Old Ironsides Energy include Late-Stage rounds. Check that against your own round before reaching out: stage mismatch is the most common reason a well matched sector still goes nowhere.
Who should I pitch at Old Ironsides Energy?
Both people on file at Old Ironsides Energy are listed as contacts for the firm, each with their own profile page.
How do I contact Old Ironsides Energy?
Any email address on file for the firm is masked on this page and readable inside RaiseHunt after you create an account. The 2 people attached to the firm have their own pages, each showing whether an address is on file for them.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal