Rohm slid sharply as takeover expectations around Denso weakened during Tokyo trading on April 27

📉 Rohm shares fell as much as 16% after Denso confirmed it was considering withdrawing its acquisition proposal, as it had not received approval from Rohm. The move quickly removed part of the M&A premium that investors had previously priced into the stock.
🔎 Denso, a major Toyota supplier, had been seeking to strengthen its position in power semiconductors for EVs, industrial use, and data centers. Rohm, however, has not supported the current proposal and is still pursuing a power-device consolidation plan with Toshiba and Mitsubishi Electric.
⚖️ Market reaction was split, with Rohm facing heavy selling pressure while Denso rose modestly on expectations that it may avoid an expensive deal. In the near term, Rohm could remain volatile without the M&A catalyst, but Japan’s power semiconductor restructuring story is not over yet.
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