Jin Rong Jie·2025-08-14 08:52Company Overview - China Oilfield Services Limited (COSL) is a major integrated oilfield service provider globally, offering services across all stages of offshore oil and gas exploration, development, and production [1] - COSL's business is divided into four main categories: geophysical exploration services, drilling services, oilfield technical services, and marine services [1] Stock Performance - On August 14, the Shanghai Composite Index fell by 0.46%, closing at 3666.44 points, while the Hang Seng Index decreased by 0.37%, closing at 25519.32 points [1] - COSL's A-shares closed at 13.87 yuan, down by 1.0%, and its H-shares closed at 7.19 Hong Kong dollars, down by 0.28% [1] - The A/H premium for COSL reached 111.03%, ranking it 20th among AH shares in terms of premium rate [1] Listing Information - COSL was publicly listed on the Hong Kong Stock Exchange on November 20, 2002, under the stock code 2883 [1] - The company began trading in the U.S. over-the-counter market as American Depositary Receipts (ADRs) on March 26, 2004, with the stock code CHOLY [1] - COSL's A-shares were listed on the Shanghai Stock Exchange on September 28, 2007, under the stock code 601808 [1]