As a result, WuXi AppTec has lost more than one-third (about 37%) of its market capitalization—the product of the share price and the number of outstanding shares—since the start of the year, going from $28.369 billion on January 2 to approximately $18 billion as of Friday. WuXi Biologics' market cap has sunk by more than half (55%), going from $15.636 billion to about $7.1 billion.