** ASX-listed shares of Arcadium Lithium ALTM.AX rise as much as 8.2% to A$9.15, their highest since Jan. 12, 2024
** Stock marks its best day since Dec. 24
** Stock is the top performer on the ASX 200 benchmark
** Lithium chemicals producer says it has received clearance from the Committee on Foreign Investment in the United States (CFIUS) regarding co's proposed acquisition by Rio Tinto RIO.AX
** Says the committee found no unresolved national security concerns surrounding the takeover deal
** Adds co expects the proposed transaction to close before mid-2025
** About 2.1 mln shares change hands, compared with the 30-day average volume of 1.5 mln
(Reporting by Sneha Kumar in Bengaluru)
((Sneha.Kumar@thomsonreuters.com))
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