Hartree Partners Power & Gas Company (UK) Limited business energy supplier profile
Hartree Partners Power & Gas Company (UK) Limited sits within the Hartree energy and commodities group, which trades natural gas, electricity, emissions and related derivatives, and also supplies and distributes gas and power as part of its broader wholesale energy business. The public website positions Hartree as a global energy and commodities firm serving enterprise-level and multinational customers, with UK operations linked to the Hartree Partners brand and Oaktree-backed ownership.
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Snapshot, in plain English
Is Hartree Partners Power & Gas Company (UK) Limited right for your business?
Licensed for 24 years with accounts currently filed. Sizing detail not yet independently researched, but the Companies House profile shows an established, active licensee suitable for single-site SME and mid-market multi-site contracts. Run standard counterparty due diligence before a 3-year commitment above £250k spend.
Risk band reasoning: Active, 24 years trading, accounts current.
| Your business | Fit | Why |
|---|---|---|
| Single site SME | Fit | Often competitive on single-site fixed rates. |
| Multi-site SME | Fit | Most mid-market suppliers handle multi-site billing. |
| I&C £250k to £1m spend | Possible | Check counterparty viability over a 3-year term. |
| I&C above £1m spend | Not suited | Below the scale threshold for I&C tenders. |
Quick facts
| Trading name | Hartree Partners Power & Gas Company (UK) Limited |
|---|---|
| Licence holder | HARTREE PARTNERS POWER & GAS COMPANY (UK) LTD. Parent: Immediate parent / ultimate controlling entity: Hartree Partners, LP; UK group context also refers to Hartree Partners (UK) Limited and Hartree Partners Power & Gas Company (UK) Limited as direct or indirect subsidiaries of Hartree Partners, LP |
| Supplies | Gas |
| Website | hartreepartners.com |
| Business phone | +44 20 7201 7134 |
| Email / contact | Contact page |
| Rate status | Quote required |
Company data
Live data on the licence-holding companies behind Hartree Partners Power & Gas Company (UK) Limited, compiled by Purely Energy's independent research team and refreshed monthly.
Hartree Partners Power & Gas Company (UK) Limited out-of-contract and deemed rates
Not publicly published / quote required
Hartree Partners Power & Gas Company (UK) Limited published rate page
If you are on deemed, default, rollover, variable, or Out-of-contract rates, ask for a written renewal quote and compare it against live market prices before agreeing a new contract.
Where your p/kWh actually goes
Indicative split for a UK I&C electricity bill in 2026, sourced from Cornwall Insight's non-commodity cost research. Your meter, region and contract type shift the exact mix, but the four components are always present.
- Wholesale energy, 38%Gas or power bought on the wholesale market. The figure most coverage focuses on.
- Non-commodity costs, 53%Network charges (DUoS, TNUoS), policy levies (RO, FiT, CfD, Capacity Market), CCL and balancing costs.
- Supplier margin, 6%What the supplier earns. Always priced into the unit rate.
- Broker margin, 3%What we earn for tendering and managing the contract. Shown separately on every Purely Energy quote.
Who Hartree Partners Power & Gas Company (UK) Limited may suit
Best suited to larger commercial and industrial energy users, wholesalers, and organisations with sophisticated procurement or risk-management needs rather than small-business fixed-price retail customers. Public materials point to trading, consulting, and structured energy-market capability, not a mass-market SME proposition.
Trading name and licence-holder notes
The licence holder appears to trade under the broader Hartree Partners / Hartree group brand rather than a separate consumer-facing retail energy name. Public UK materials refer to Hartree Partners (UK) Limited and Hartree Partners Power & Gas Company (UK) Limited as UK subsidiaries of Hartree Partners, LP. I did not find a separate public business-supply brand or a published retail tariff page.
Switching from Hartree Partners Power & Gas Company (UK) Limited to a fixed business contract
UK businesses can switch gas supply away from Hartree Partners Power & Gas Company (UK) Limited once their fixed contract ends, or after resolving any open objection or termination-window issue. The process is the same for every supplier on the non-domestic market, but a few checks done in the right order make the transfer materially faster.
- 1. Find your contract end date. It's on your last renewal letter or the most recent bill from Hartree Partners Power & Gas Company (UK) Limited. Most non-domestic contracts have a 1 to 6 month termination window before that date, outside of which you may auto-roll onto a new fixed term.
- 2. Get your MPRN ready. The 21-digit MPAN (electricity) and 6 to 10-digit MPRN (gas) uniquely identify each meter and are needed for any competing quote. Both appear on your bill.
- 3. Compare against the live market. Hartree Partners Power & Gas Company (UK) Limited doesn't publish standard out-of-contract rates, so request a written renewal quote first and benchmark it against live market prices before agreeing anything. Purely Energy can run your meters against the wider UK panel and come back with the cheapest fixed offers.
- 4. Settle the final bill and clear any objections. Hartree Partners Power & Gas Company (UK) Limited will issue a final bill within 6 weeks of supply transferring. If a balance is outstanding, they can object to the switch under industry rules, so clear it before the transfer date to avoid a hold.
- 5. Sign the new contract. Once the new supplier has your MPAN/MPRN and signed contract, the transfer typically completes within 4 to 8 weeks. There is no break in supply, you simply receive your first bill from the new supplier.
Need help with any of these steps? Our team handles the paperwork end-to-end as part of every quote.
Need help comparing Hartree Partners Power & Gas Company (UK) Limited?
Purely Energy can check your current rates, compare renewal options across gas suppliers, and review whether switching could reduce your business energy costs.
FAQs
Who supplies energy under the Hartree Partners Power & Gas Company (UK) Limited brand?+
The Ofgem non-domestic licence is held by HARTREE PARTNERS POWER & GAS COMPANY (UK) LTD., ultimately part of Immediate parent / ultimate controlling entity: Hartree Partners, LP; UK group context also refers to Hartree Partners (UK) Limited and Hartree Partners Power & Gas Company (UK) Limited as direct or indirect subsidiaries of Hartree Partners, LP. The trading name on your bill or contract may differ from the licence holder, which is normal and reflects how UK energy is regulated.
What is the Hartree Partners Power & Gas Company (UK) Limited business contact number?+
Hartree Partners Power & Gas Company (UK) Limited can be reached on +44 20 7201 7134. The official contact page is https://www.hartreepartners.com/contact/.
Does Hartree Partners Power & Gas Company (UK) Limited publish out-of-contract rates?+
Hartree Partners Power & Gas Company (UK) Limited does not appear to publish a standard deemed or out-of-contract rate online. Business customers should request a written renewal quote in advance of their contract end date and compare it against live market prices.
Can I switch away from Hartree Partners Power & Gas Company (UK) Limited?+
In most cases, businesses can switch gas supply away from Hartree Partners Power & Gas Company (UK) Limited at the end of a fixed-term contract or after resolving any objections, debt, termination-window, or meter-data issues. The safest route is to check your contract terms, final bill position, and renewal dates before starting a transfer.
How long does it take to switch from Hartree Partners Power & Gas Company (UK) Limited?+
Once a new supplier has the meter point details (MPAN/MPRN) and a signed contract, a non-domestic switch typically completes within 4 to 8 weeks. Supply does not break: the new supplier takes over billing on the transfer date.
Is Hartree Partners Power & Gas Company (UK) Limited a UK-licensed supplier?+
Yes. Hartree Partners Power & Gas Company (UK) Limited is on the Ofgem non-domestic licensee register for gas. Ofgem maintains the official register at ofgem.gov.uk.
What are out-of-contract business energy rates?+
Out-of-contract rates are the prices a business pays when no fixed-term contract is in place with its supplier. They can be materially higher than negotiated contract rates, so businesses should check their contract end date and renewal window before they expire.
Other UK gas suppliers
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Sources
Public data this profile is built from. Always verify rate and contract details on the supplier's own website before relying on them.