AI Data Center Beneficiaries Surge Nearly 900 Billion Won in Market Cap in Just One Day

Semtech Corp. (NASDAQ: SMTC) shares surged 7.49% to close at $91.60 on the New York Stock Exchange yesterday, with trading volume reaching approximately 1.9 million shares. Its market capitalization rose by about $690 million (roughly KRW 930 billion) in a single session.

In its fiscal 2026 fourth‐quarter report released in March, Semtech increased revenue by 9.3% year-over-year to $274 million but swung to a net loss of $29.8 million. The company pointed to growing demand for high-speed interconnects and optical transceivers for data centers and AI applications as key growth drivers. On the same day, a research note classified Semtech as a “name to avoid” among Russell 2000 constituents, citing deteriorating operating margins, declining free cash flow and a high valuation.

Headquartered in Camarillo, California, Semtech is an analog and mixed-signal semiconductor firm that supplies high-speed signal-integrity chips for data centers and LoRa-based chips for Internet of Things communications. In 2023, it acquired Canadian IoT and communications equipment maker Sierra Wireless for about $1.2 billion to expand its IoT and cloud-connectivity business. Since its 2023 low, the stock has attracted investor attention for its volatility and growth potential, more than quadrupling amid the AI data-center investment boom.