Onsemi to Buy Synaptics for $7 Billion to Push AI Beyond the Data Center

What onsemi agreed to buy

onsemi makes the kind of chips most people never think about, the parts that move and measure electricity inside electric cars, factory machines and the power systems that feed AI data centers. On June 25 it agreed to buy something it largely lacks today, the chips that let a device think on its own. Synaptics designs processors for edge AI, meaning AI that runs directly on a phone, camera or sensor rather than in a far-off server, plus the touch, display and wireless parts that connect those devices.

At the center of the deal is Synaptics’ Astra line, a family of low-power AI processors bundled with Wi-Fi, Bluetooth and open-source software. onsemi wants to attach that computing layer to its own strengths in power and sensing so it can sell complete systems instead of single components. Chief Executive Hassane El-Khoury described the goal as putting onsemi at the meeting point of four pillars, Power, Sense, Connected Compute and Control.

The case for Physical AI

The logic rests on one idea, that the next phase of AI happens in the physical world. As software moves into self-driving cars, warehouse robots and AR and VR headsets, those machines will have to sense their surroundings, decide, act and adapt in real time. onsemi argues that this calls for power, sensing, computing and connectivity working as one. Buying Synaptics, the company says, widens the market it can address by $30 billion, reaching $243 billion by 2030.

The near-term math is smaller than the vision. onsemi expects about $200 million in yearly cost savings and says the deal should add to adjusted earnings per share within 18 months of closing. It pledged to keep its current dividend and buyback policy in place while the transaction is pending, and one Synaptics director would join its board.

Why the stock dropped

The market’s response was blunt. Because onsemi is paying in its own shares rather than cash, the deal would hand roughly 12% of the company to Synaptics holders, and current owners felt that dilution at once. onsemi shares fell 19.1% on June 26 to $96.09, erasing far more market value than the deal is worth on paper. Synaptics shares held near $126 as investors priced in the takeover.

Timing made the reaction sharper. The news arrived in the middle of a wider sell-off in chip and AI-infrastructure stocks, as investors weighed how much the AI build-out will eventually cost. Paying a premium with stock the market may already see as undervalued is exactly the kind of move shareholders question.

What to watch

1. onsemi plans to file a Form S-4 that registers the new shares and serves as the proxy statement for Synaptics investors. That filing, not the press release, will reveal the full terms, including any breakup fee and how the combined company will be run.

2. Antitrust regulators in the United States and abroad must clear the deal before it can close in mid-2027. Large chip mergers have faced long reviews in recent years, and the stretch between signing and closing leaves room for the price or the timeline to shift.

3. Because the offer is a fixed number of shares rather than a fixed dollar amount, its value tracks onsemi’s stock. Further weakness in onsemi shares would shrink what Synaptics holders eventually receive, which could make the shareholder vote harder to win.