Monday's Late Winners & Losers

Among the movers in Monday's very quiet and thinly traded late session were oil drillers Transocean (RIG Quote) and GlobalSantaFe (GSF Quote).

Shares saw heavy postclose volume after the U.K.'s Office of Fair Trading cleared the merger-of-equals that the Houston-based companies agreed to earlier this year, having mollified certain of the regulators' antitrust concerns. The companies say they expect the merger to close Tuesday -- the originally scheduled date -- in light of the news.

Transocean shares were down 0.8% to $128.45. GlobalSantaFe lately ticked up 33 cents to $87.16.

Other after-hours winners included drugmaker Bristol Myers Squibb (BMY Quote), up 1.7% to $28.07; closeout retailer Big Lots (BIG Quote), up 0.4% to $20.40; and real estate investment trust Apartment Investment & Management (AIV Quote), which added 2.8%.

The decliners included Pharmacopeia (PCOP Quote), which slid 7.2% to $4.15; auctioneer Sotheby's (BID Quote), down 2.2% to $34.25; and clinical-research company Kendle International (KNDL Quote) which was off 88 cents, or 2.1%, to $41.50.