SEC filing: Ambiq Micro, which makes ultra-low power chips, is seeking to raise as much as $85M from its IPO, marketing 3.4M shares at $22 to $25 each (Anthony Hughes/Bloomberg)

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Anthony Hughes / Bloomberg:SEC filing: Ambiq Micro, which makes ultra-low power chips, is seeking to raise as much as $85M from its IPO, marketing 3.4M shares at $22 to $25 each  —  Ambiq Micro Inc., a maker of ultra-low power semiconductors for artificial intelligence applications, is seeking to raise as much as $85 million from an initial public offering.