AI Mega-Rounds Surge: Sierra $950M, Moonshot $2B, Panthalassa $140M, QuantWare $178M

Bret Taylor's Sierra secured $950 million led by Tiger Global and GV, reaching a $15.8 billion valuation. ARR grew from $100 million to $150 million in eight months. China's Moonshot AI raised $2 billion led by Meituan, crossing a $20 billion valuation (a 4x jump from $4.3 billion six months earlier), with April ARR surpassing $200 million. Peter Thiel-led Panthalassa closed $140 million for wave-powered offshore AI data centers, while QuantWare closed $178 million (Delft quantum chip, Intel Capital-led) and Parallel Web Systems raised $100 million (Sequoia) in the same week.