On August 21st, Arm, a leading chipmaker, filed for an initial public offering (IPO) on America's Nasdaq, marking a significant milestone in the chip technology industry. Arm, whose designs power most of the world's smartphones, is owned by the Japanese technology conglomerate, SoftBank Group. The IPO could potentially be the largest of the year, signaling a revival of an IPO market that has been largely dormant since 2022.  SoftBank acquired Arm, previously listed on the London Stock Exchange, for $31bn in 2016. A proposed $40bn sale to Nvidia, another chipmaker, was halted by competition authorities in 2020. Now, SoftBank is set to retain majority control and pocket all the proceeds from the IPO. Although the filing does not specify the intended raise or the chipmaker's worth, SoftBank's recent $16bn purchase of a 25% stake from its Vision Fund suggests a valuation around $64bn.  Arm's unique business model, which involves licensing its designs to customers who can modify them as needed, has led to its chips being ubiquitous. Arm's technology is found in 99% of the world's smartphones, 65% of processors in devices that connect to the internet, and 41% of the automotive sector. Even in the cloud-computing market, long dominated by Intel, Arm-based processors account for 10% of the chips sold.  However, Arm faces challenges from sluggish demand in its core products and a growing threat from open-source alternatives like RISC-V. Qualcomm, an American chipmaker specializing in smartphone processors, recently reported a 23% drop in sales compared to last year, a trend expected to continue until the end of the year. RISC-V's license- and royalty-free designs could also potentially disrupt Arm's revenue model.  Despite these challenges, the AI boom brightens Arm's prospects. Nvidia recently unveiled a new chip that combines an Arm-based central processing unit with its graphics-processing unit. As AI moves from data centers to consumer apps, devices able to run AI functions using less energy will be needed, and Arm's expertise in low-power, high-performance chips could meet this demand.  Arm's IPO comes at a time of heightened tension between China and America, which could impact its revenue as a quarter of it comes from Arm China, a separate entity. However, the excitement around AI and a market starved of blockbuster IPOs could potentially overshadow these concerns. As SoftBank's founder, Son Masayoshi, vowed to take Arm public in the 'largest IPO in semiconductor history', the market's AI exuberance might just make his wish come true.