By Aaditya GovindRao

Jan 29 (Reuters) - Shares of Boss Energy BOE.AX rose about 16% on Wednesday and were poised for their best day in nearly three years, after the uranium miner reported quarterly output well ahead of analysts' estimates for its flagship Honeymoon project in South Australia.

The stock climbed as much as 15.9% by 0026 GMT and was set for its best single-day rise since March 2022 if current gains held. It was the top gainer on the S&P/ASX 200 .AXJO benchmark index, which was up 0.5%.

An ongoing production ramp-up at Honeymoon helped the miner log uranium concentrate (U308) output of 215,319 pounds in the October-December period, almost double from the prior quarter, and beating a consensus estimate of about 157,400 pounds, according to analysts at Jefferies.

The company reiterated its fiscal 2025 production forecast of 850,000 pounds of U3O8 for Honeymoon.

Boss Energy and other uranium stocks rose sharply last week, propelled by a planned $500 billion private-sector investment to fund AI infrastructure and U.S. President Donald Trump's plans for tariffs on major uranium exporter Canada.

"Security of supply is a major concern for nuclear utilities, particularly in the western world, and as a multi-mine tier 1 uranium producer, Boss is set to benefit from this changing and growing market," Boss Energy Managing Director Duncan Craib said in a statement on Wednesday.

The miner forecast costs of A$37 to A$41 per pound of U3O8 for the Honeymoon project for the second half of fiscal 2025.

The costs demonstrate an element of inflation, which is not unexpected and given industry-wide trends, analysts at Jefferies said.

"We see the potential of these to decrease marginally as the operation reaches steady state production over the course of CY26," they said.

(Reporting by Aaditya Govind Rao in Bengaluru; Editing by Subhranshu Sahu)

((Aaditya.GovindRao@thomsonreuters.com;))