Here are the stocks that made notable moves on Monday: PDD Holdings – Shares of the Temu parent company fell nearly 30% following disappointing second-quarter results. The China-based online retailer posted revenue of 97.06 billion yuan, or $13.6 billion, compared with consensus estimates of 100.17 billion yuan, according to analysts surveyed by FactSet. Management said revenue growth is likely to continue to be pressured by rising competition. Icahn Enterprises – Shares of Carl Icahn's investment firm fell nearly 10% after Icahn Enterprises filed with the U.S. Securities and Exchange Commission to sell up to $400 million of depositary units through an “at-the-market” offering program. The firm intends to use any net proceeds from the offering to fund potential acquisitions and for company purposes, the filing said. Icahn settled charges with regulators last week, paying a total of $2 million in fines for failing to disclose up to $5 billion in personal margin loans pledged against the value of his Icahn Enterprises stock. SolarEdge Technologies — The green energy stock fell nearly 8% after announcing a change in CEO. Previous CEO Zvi Landau has stepped down and Chief Financial Officer Ronen Fair will become interim CEO effective Monday while the board searches for a permanent replacement. Petrobras — The Brazilian oil company's U.S.-listed shares rose 6% after an upgrade from Morgan Stanley. The firm said the company's dividend improved its investment case. Boeing — Planet Fitness — Shares of the gym chain rose nearly 1% after Baird analyst Jonathan Komp maintained his overweight rating and added a “bullish fresh pick” designation for the stock through year-end. Komp said Planet Fitness is an attractive play in a slowing growth environment. Warner Bros. Discovery – Shares of the entertainment company rose 4% on Monday, building on a 7% rally from Friday. There appeared to be no obvious catalyst for the move. Warner Bros. Discovery is in a legal battle with the National Basketball Association over a new media rights deal. Micron Technology – The chip stock fell 3%. Needham lowered its price target on Micron Technology to $140 from $150 on Monday, a move that represents an upside of about 36% from Friday’s close. Analyst Quinn Bolton attributed the move to Micron’s recent comments suggesting that bit shipments would remain flat in the fall, a potential risk to November consensus estimates. Still, Bolton maintained a buy rating on the stock. Super Micro Computer – Shares of the chipmaker fell more than 7% on Monday, part of a broader sell-off for semiconductor stocks. Super Micro is on track for its fourth negative session out of six. — CNBC’s Yun Lee, Alex Herring, Piya Singh, Sarah Min and Hakyung Kim contributed.