Amplitude Energy Limited (ASX: AEL), formerly Cooper Energy Limited, is an ASX-listed exploration and production company focused on developing and supplying natural gas to the southeast Australian market alongside low-cost oil production from the Cooper Basin; its core assets include the Sole gas field and Casino Henry operations in the Gippsland and offshore Otway Basins respectively, the Athena and Orbost gas processing plants, undeveloped resources such as Annie and Manta, and onshore interests in the Otway and Cooper/Eromanga Basins; the company produces and sells gas and associated liquids including condensate and oil to domestic customers in Victoria and South Australia, with processing facilities optimized for high reliability exceeding 99% in FY25 year-to-date. Founded in 2001 and headquartered in Adelaide, South Australia, Amplitude Energy operates exclusively in Australian basins, supporting regional economies through local jobs and procurement while reserving output for domestic energy needs equivalent to hundreds of thousands of homes. In late 2024, shareholders approved and implemented a rebranding from Cooper Energy to Amplitude Energy to align with a new growth strategy emphasizing resource potential; the company raised FY25 production guidance to 65-72 terajoules equivalent per day driven by record performance at Orbost including extended absorber runtimes and reduced flaring; it entered binding 50/50 joint venture arrangements with O.G. Energy for the East Coast Supply Project featuring a three-well drilling program in FY26 to add up to 90 terajoules per day by 2028 pending approvals, alongside an Offshore Project Proposal opened for public comment in November 2024; earlier, it acquired the Orbost Gas Processing Plant from APA Group in 2022 for $270-330 million and realized $10.5 million in annualized savings through efficiency initiatives by FY24 end.