For the week, the Shanghai Composite Index fell 1.07%, the Shenzhen Component Index edged down 0.02%, and the ChiNext Index gained 3.50%. A total of 1,640 stocks posted weekly gains, with 115 stocks rising more than 20%.
Excluding stocks listed within the year, the top 20 weekly gainers all rose more than 36%. Among them, 7 stocks were from the electronics sector and 3 from the utilities sector.
Within the top 20, seven stocks surged over 50%. The top performer, Peric Special Gases Co.,Ltd., achieved three limit-up moves in five days, soaring 82.3% for the week and 260.27% year-to-date.
The sharp rise in Peric Special Gases Co.,Ltd.'s share price stems from market expectations regarding its tungsten hexafluoride product.
On the evening of May 14, Peric Special Gases Co.,Ltd. issued a risk warning announcement concerning stock trading. The company noted recent media reports and market rumors about production cuts by Japanese tungsten hexafluoride suppliers. Influenced by policies such as export controls on tungsten-related items and total mining volume controls, upstream tungsten raw material supply has tightened. Recently, some downstream clients have increased business discussions with the company regarding tungsten hexafluoride products. However, no new long-term or substantial large orders have been signed yet, and subsequent cooperation and its impact on the company's operating performance remain uncertain. The company also noted that some online platforms contain inaccurate information regarding its tungsten hexafluoride product capacity, prices, and specifications, reminding investors to rely on official announcements.
The second-best performer, On-Offline, secured two limit-up moves this week, rising 75.48%. Liren Technology, with five consecutive limit-up moves, gained 61.08%, while Mona Lisa, with six consecutive limit-up moves, rose 61.02%. Datang International Power Generation Co.,Ltd. surged 42.96% for the week, marking it as a standout with seven limit-up moves in eight days. Since May 7, it has hit the limit-up on all trading days except May 14, accumulating a monthly gain exceeding 90% and a year-to-date increase of 126.93%.
Huadian Liaoning Energy Development Co.,Ltd., Hefei Urban Construction, and Jingneng Power also recorded three limit-up moves each this week. Among them, Huadian Liaoning Energy Development Co.,Ltd., with five limit-up moves in eight days, rose 40.11% for the week, 75.71% for the month, and a staggering 511.58% year-to-date! Only two A-share stocks have gained over 500% year-to-date: Huadian Liaoning Energy Development Co.,Ltd. and Litong Electronics, which has surged 537.90%. Litong Electronics rose 1.44% for the week.
On May 13, Huadian Liaoning Energy Development Co.,Ltd. issued an announcement to warn of trading risks, noting that its stock price deviation had accumulated to 20% over two consecutive trading days on May 11 and 12, 2026. The company's main business is thermal power generation, and its daily operations have not undergone significant changes. It is not involved in computing-power grid synergy projects. In the first quarter of 2026, Huadian Liaoning Energy Development Co.,Ltd. reported revenue of 1.408 billion yuan and a net profit attributable to shareholders of 158 million yuan. On the news front, on May 8, four ministries including the National Development and Reform Commission jointly issued the "Action Plan for Promoting the Mutual Empowerment of Artificial Intelligence and Energy," clarifying the direction of computing-power grid integration. The plan proposes that by 2027, the interactive capability between clean energy and computing facilities will be significantly enhanced; by 2030, the supply guarantee capability of clean energy for AI computing facilities will reach world-leading levels.
Among this week's top 20 performers, several other stocks have also more than doubled year-to-date, including Guangpu Shares, Xingfu Electronics, Yida Shares, Changyingtong, Liren Technology, and Jingsheng Shares.
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