** Biotechnology firm IGM Biosciences Inc's shares IGMS.O
up 41.8% at $21.25 premarket
** IGMS and Sanofi SASY.PA enter collaboration agreement
to develop antibody medicines for treatment of cancer,
immunology and inflammatory diseases
** IGMS posts Q4 net loss of $50.6 mln, or $1.50 per share,
compared with net loss of $24.6 mln, or 79 cents per share, a
year ago
** Expects operating expenses of $250 mln to $260 mln in
2022
** Up to last close, stock had fallen ~49% YTD
(Reporting by Akash Sriram in Bengaluru)
((Akash.Sriram@thomsonreuters.com;))