Check out which companies are making headlines after the bell Monday:
McDermott International - The provider of engineering and construction services got hit in after-hours trade after it withdrew its prior guidance and suspended guidance for the foreseeable future.
Lorillard - Shares of the tobacco company edged higher in after-hours trading after the Financial Times cited people familiar with the matter in reporting that RJ Reynolds is exploring a bid for its competitor.
Vipshop Holdings - Shares of the online Chinese retailer rallied in extended-hours trade after it projected first-quarter revenue above expectations.
—By CNBC's Kate Gibson
Questions? Comments? Email us at marketinsider@cnbc.com