Investor Bill Hwang set off a storm in the stock market in March when his firm, Archegos Capital Management, and its banks, began liquidating huge positions in blue-chip companies, according to people familiar with the transactions. The sales sent individual stocks swooning and have left at least three banks with major damage. Credit Suisse said on April 6 that it would take a $4.7 billion hit because of the meltdown.

What is Archegos Capital?

Archegos is the family investment vehicle owned by Mr. Hwang, a former protégé of hedge-fund titan Julian Robertson. Mr. Hwang was a so-called Tiger cub, an offshoot of Mr. Robertson’s Tiger Management. Mr. Hwang founded Tiger Asia in 2001. Based in New York, it went on to become one of the biggest Asia-focused hedge funds, running more than $5 billion at its peak. In 2008, it was one of a swath of funds that suffered losses related to the soaring share price of Volkswagen AG of Germany

In 2012, Tiger Asia said it planned to hand money back to investors. Later that year, the firm pleaded guilty to a criminal fraud charge for using inside information from investment banks to profit on securities trades. Mr. Hwang and Tiger Asia paid $44 million to settle a related civil lawsuit, The Wall Street Journal reported at the time.

Mr. Hwang turned Tiger Asia into his family office and renamed it Archegos, according to its website.

“This is a challenging time for the family office of Archegos Capital Management, our partners and employees. All plans are being discussed as Mr. Hwang and the team determine the best path forward,” a company spokeswoman said in a written statement on March 29.