Amid a spate of high-profile fights in the business world, one New York hedge fund has thrown a lot of punches. Elliott Management, which oversees about $30 billion worth of assets, has earned a reputation over 40 years as a no-holds-barred activist investor, with an unusually large appetite for public face-offs. The firm famously pursued Argentine debt for more than a decade, seizing one of the country's naval ships while it was docked in Ghana and prompting the country to default. In the UK, it also intervened in coach operator National Express and fought supermarket Tesco for damages stemming from...