** Semiconductor company and cloud services provider Semtech's SMTC.O shares rise 12.5% to $36.80 premarket

** Company on Thursday reported Q4 revenue of $251 million vs est $249.2 million, according to data compiled by LSEG

** SMTC reported Q4 adj profit of 40 cents/shr vs est 32 cents/shr

** Company's shares up 41.3% in past 12 months

(Reporting by Padmanabhan Ananthan)

((padmanabhan.ananthan@thomsonreuters.com))