Arc'teryx Parent Company Soars 8% on First Day of Index Inclusion

AMER SPORTS INC (AS) closed at $33.15 on the New York Stock Exchange on March 23, marking a 7.84% increase. Trading volume exceeded 3.55 million shares, and the company’s market capitalization rose by roughly $1.6 billion in a single day to about $19.1 billion (approximately KRW 25.9 trillion).

Analysts attribute the stock’s strong performance to expectations of passive inflows following Amer Sports’ inclusion—effective March 23—in the STOXX USA 900 as well as the index provider’s Equal Weight and CTB benchmarks. Earlier, in its February 24 release of fourth-quarter and full-year 2025 financial results, the company reported 27% revenue growth and margin expansion, and reaffirmed its growth trajectory by guiding for 16–18% revenue growth and a double-digit operating margin in 2026.

Founded in Finland in 1950, Amer Sports is a global group of premium sports and outdoor brands—including Arc’teryx, Salomon, Wilson, and Peak Performance—and went public on the NYSE in February 2024. With a consortium led by China’s Anta Sports and Tencent as its controlling shareholder, the company is viewed as particularly sensitive to shifts in Chinese consumer trends and premium outdoor demand.