By Linda Chiem ( July 14, 2015, 6:47 PM EDT) -- In what could potentially be the largest foreign takeover by a Chinese firm, a Chinese state-owned company has prepared a $23 billion bid to buy U.S. memory-chip maker Micron Technology Inc., The Wall Street Journal reported Tuesday. Chinese state-owned Tsinghua Unigroup Ltd., China's top microchip maker, is reportedly willing to pay $21 a share for Micron and has outlined its proposed bid in a letter presented to the company, according to the report. That price would be a 19.3 percent premium over Micron's closing price on Monday. But a spokesman for Boise, Idaho-based Micron told the WSJ that the company had not received a buyout offer. The rumored offer would likely face heavy scrutiny by U.S. officials. And it comes amid a wave of consolidation in the chipmaking industry that has seen several high-profile deals in recent months, including chipmaker Avago Technologies Ltd.'s $37 billion bid to acquire rival Broadcom Corp. — said to be the largest semiconductor transaction in history — and Intel Corp.'s proposed $16.7 billion acquisition of chipmaking rival Altera Corp....