Amends fourth bullet after Metsera corrects Novo's previous CVR offer to $21.25 from $22.50
** Shares of weight loss drug developer Metsera MTSR.O rise 12.7% to $68.64
** Novo Nordisk NOVOb.CO and Pfizer PFE.N have revised their bids for Metsera, co says
** Novo's revised offer brings the deal value to about $10 billion, while Pfizer is now willing to shell out $8.1 billion
** As per Novo's new offer, Metsera is also eligible to receive an additional $24.00 per share in cash, up from $21.25, based on development and regulatory approval milestones
** Pfizer has filed two lawsuits against Metsera, its board, and Novo Nordisk
** Including session moves, MTSR has more than doubled since its stock market debut in January
(Reporting by Sneha S K)
((Sneha.SK@thomsonreuters.com;))