HEADLINE STOCKS-U.S. small/midcap stocks on the move on Oct 26

(Updates to add Vivus, Arena and Hansen )

(For large-cap stocks on the move, click on [WATCH/US])

Oct 26 (Reuters) - Some small and midcap stocks on the move on Monday: VIVUS INC (VVUS.O), $10.06, up 9 pct

ARENA PHARMACEUTICALS (ARNA.O), $4.53, up 4 pct

Both the biopharmaceutical companies presented detailed positive late-stage data on their experimental weight-loss drugs on Sunday. [ID:nBNG431143]

HANSEN MEDICAL (HNSN.O), $2.67, down 7 pct

A class action lawsuit was filed against the company, alleging that it had misstated its revenue.

NOVATEL WIRELESS (NVTL.O), $12.40, up 12 pct

Barron's wrote that shares of Novatel could advance to $20, helped by a new portable Wi-Fi network device that could increase earnings. [ID:nN25159911]

MATRIXX INITIATIVES (MTXX.O), $4.72, down 6 pct

The company said the U.S. Food and Drug Administration has indicated that it is unwilling to reverse its position regarding the warning letter issued on company's nasal versions of Zicam cold remedy. [ID:nBNG79441]

ELRON ELECTRONIC INDUSTRIES LTD (ELRN.O), $6.70, up 10 pct

The company said it received a non-binding indication of interest from a third party regarding the potential acquisition of its subsidiary Medingo Ltd. [ID:nWNAB3958]

SUPERGEN INC (SUPG.O), $2.68, up 13 pct

The company said it entered into multi-year collaboration with GlaxoSmithKline to develop cancer drugs and received an upfront payment of $5 million. [ID:nBNG506367]

BIOCRYST PHARMACEUTICALS INC (BCRX.O), $10.81, up 12 pct NOVAVAX INC (NVAX.O), $4.31, up 7 pct