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.
