** Shares of semiconductor equipment maker Veeco Instruments VECO.O rise 7.3% to $32.64 premarket after co to merge with Axcelis Technologies ACLS.O in an all-stock deal
** VECO says combined co to have an enterprise value of $4.4 bln based on the last closing price of both companies
** VECO shareholders will receive 0.3575 ACLS shares for each share of VECO they own
** Shares of ACLS down 4.1% to $93.6 premarket
** As of last close, VECO has a market cap of $1.83 bln while ACLS has a market cap of $3.07 bln , according to data compiled by LSEG
** Up to last close, ACLS and VECO are up 39.75% YTD and 13.54%, respectively
(Reporting by Avinash P in Bengaluru)
((Avinash.P@thomsonreuters.com;))