Denso bids for Rohm

Denso, the Japanese auto parts supplier, has made an offer to buy Rohm for around $8.2bn, reported the Nikkei.

“We are considering various strategic options including the acquisition of Rohm shares,” said Denso earlier today, adding that it will “promptly disclose any material facts that are decided to be disclosed.”

In power semiconductors in Japan, Denso is collaborating  with Fuji Electric, while Rohm co-operates with Toshiba. If Denso buys Rohm, these collaborations will be upset.


Rohm tiny op ampLast July Denso had about a 5% stake in Rohm. The market capitalisation of Rohm was about $7bn yesterday. If Denso intends to buy the remaining 95% or so of Rohm’s shares, the purchase price would likely be around  $8.2bn.


Denso has been expanding its production capacity for power semiconductors.

Rohm had a loss of  $320m in its last fiscal year to March 2025.

In August last year Toshiba announced a technological co=operation agreement with a Chinese silicon carbide wafer manufacturer, provoking backlash from Rohm. The Toshiba side then terminated the agreement with the Chinese company.

David Manners

David Manners

David Manners has more than forty-years experience writing about the electronics industry, its major trends and leading players. As well as writing business, components and research news, he is the author of the site's most popular blog, Mannerisms. This features series of posts such as Fables, Markets, Shenanigans, and Memory Lanes, across a wide range of topics.

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