On July 9, Synaptics Incorporated rose 8.69% in regular trading, reaching $134.09 per share, with turnover of approximately $79.57 million. The move was driven by broad semiconductor sector strength combined with the stock's direct linkage to onsemi through a pending all-stock acquisition.

On the news front, onsemi previously announced a roughly $7 billion all-stock transaction to acquire Synaptics, under which each SYNA share will be exchanged for 1.350 shares of onsemi common stock, representing an approximately 19% premium. The deal is expected to close in mid-2027. Because the consideration is entirely in onsemi stock, Synaptics shares effectively trade as a function of onsemi's valuation. On July 9, the semiconductor sector rallied broadly, with Micron Technology up 7.43%, Advanced Micro Devices up 7.47%, and Broadcom up 3.13%, lifting onsemi's share price and consequently pulling Synaptics higher. Separately, the merger agreement includes a $235 million termination fee payable by Synaptics under certain conditions, underscoring the transaction's binding nature.

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