The chipmaker's biggest deal ever targets edge AI, but investors are punishing the stock over dilution fears
ON Semiconductor just announced its largest acquisition in company history, agreeing to buy Synaptics in an all-stock deal valued at roughly $7 billion. The move is designed to merge onsemi’s existing power and sensing technologies with Synaptics’ strengths in edge AI compute, human-machine interface, and connectivity.
Wall Street’s reaction was, to put it gently, unenthusiastic. Onsemi shares dropped between 6% and 22% in the days following the June 25 announcement, as investors digested the implications of an all-stock deal structure that will hand Synaptics shareholders approximately 12% ownership of the combined company.
The deal structure and what onsemi is buying #
The transaction sets an exchange ratio of 1.35 onsemi shares for every Synaptics share, representing a roughly 19% premium based on the 10-day volume-weighted average price. The deal is expected to close by mid-2027, subject to regulatory approvals and shareholder votes from both sides.
Onsemi sees this acquisition as its ticket into an estimated $30 billion incremental market opportunity tied to edge AI applications. The company’s total addressable market could reach as high as $243 billion by 2030, according to industry projections.
Why the market sold off #
The negative market reaction reflects concerns about dilution and execution risk. All-stock deals inherently dilute existing shareholders, and a 12% ownership stake going to Synaptics shareholders is not trivial. The regulatory approval timeline stretching to mid-2027 means uncertainty will hang over the stock for at least a year.
The 6% to 22% range in the share price decline also suggests that the market is still processing what this deal means for onsemi’s near-term earnings trajectory. Acquisitions of this size typically come with integration costs that pressure margins before synergies materialize.
Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our