Onsemi's Synaptics Bid: $7B Stock vs. $5.7B Cash

After a rival bid for sensor-and-interface maker Synaptics, power-chip supplier Onsemi revised a nearly $7 billion all-stock agreement from June 2026 to a roughly $5.7 billion cash offer on October 3. The headline value went down even as Onsemi fought to buy closer to where a machine first senses the world.

June’s $7 billion was a stock valuation

Onsemi’s revised offer sets a cash price of $123 per Synaptics share. The apparent $1.3 billion reduction compares an October cash valuation with a June valuation of Onsemi stock, not two fixed per-share prices.

CNBC reported that Onsemi shares fell more than 15% on June 26, after the stock agreement was announced. The June exchange ratio and an Onsemi reference price are needed to calculate what the original offer implied per Synaptics share; neither appears in the cited reporting. The October report gives no terms for the rival bid either, so its arrival cannot establish whether competition raised the price.

Synaptics has proved inputs in phones, not this combination

CNBC described the June acquisition as part of Onsemi’s push into physical AI. That rationale makes Synaptics’ record in device inputs relevant, but it leaves the proposed combination to prove itself. In 2013, Synaptics paid $255 million for fingerprint-sensor maker Validity. Reuters reported that it agreed to buy an iPhone display-chip supplier for $475 million in 2014. By late 2017, Synaptics said an in-display fingerprint sensor was in mass production with a top-five device maker. Those are concrete phone-interface milestones; they do not show what Onsemi’s power hardware would change in a finished system.

A rival acquisition points to a different edge-AI part

In September, Analog Devices agreed to pay $1.35 billion in cash, with possible additional payments of up to $200 million, for low-power AI processor maker Alif Semiconductor. That deal identifies a processor as the target. Synaptics’ documented interface wins alone do not establish a performance gain from pairing the companies’ parts.

A smart display would offer a specific test: name a Synaptics touch controller and an Onsemi power component in one customer design, then compare its power draw with an existing design at the same touch-to-display response time. That would test a system benefit rather than infer one from common ownership.

The October offer puts $123 on each Synaptics share. That price tells a device maker nothing about the watts a combined design would draw.