Mosman Oil and Gas Limited has changed its name to Quantum Helium Limited (QHE).

The Australian Securities & Investments Commission has issued a Change of Name certificate on 13 November 2025, and the name change has become effective immediately.

The change of name has been notified to the London Stock Exchange and trading in the company's depository interests in respect of ordinary shares under the new company name, Quantum Helium Limited, and new ticker, QHE, commenced on 14 November 2025.

The company's new website address is https://www.quantum-helium.com and its new social media handle is @QuantumHelium.

Shareholders will be unaffected by the change of name, and any existing certificates representing depository interests bearing the company's former name remain valid.

"The adoption of the Quantum Helium name reflects our evolution into a dedicated helium exploration and development company with verified and fast-advancing projects in Colorado's Four Corners region,” said Carl Dumbrell, executive chairman of Quantum Helium.

“Our Sagebrush project has already been independently evaluated by Sproule ERCE, while the evaluation process for Coyote Wash is now underway, with results expected before the end of this month. With 3D seismic acquisition about to commence and an extended flow test planned at Sagebrush this quarter, we are entering a very active and potentially value accretive period for the company. Quantum Helium benefits from proven helium prospective resources, a drilled and cased discovery well, and clear pathways toward commercial production. I'm very optimistic about the opportunities ahead for the Company and our shareholders."

 

View from Vox

 

The name change puts the seal on the remarkable transformation of Mosman into a fully-fledged and growing helium company. The upcoming work programmes offer significant upside at Sagebrush, while Sproule’s evaluation of Coyote Wash will be watched with interest. There is plenty to like here, including the presence in the area of existing infrastructure, so we can expect a new period of positive newsflow from the newly-named Quantum Helium,