After 12 years of being managed by Carlyle Group LP, a private equity manager firm, the California Public Employees' Retirement System plans to sell its total 4% stake.

The sale was priced at US$373.3 million as of Monday after the stock market trading ended. This was valued after 13 months of initial public offer. From then on, the firm's shares have risen to 34%.

In order to raise cash, alternative asset managers like Carlyle and Apollo Global Management sold their stakes to the largest investors in the industry. Their following IPOs gave investors the chance to easily get their cash out from their investment.

In 2001, Calpers bought a 5.5% stake in Carlyle for US$175 million but was later lowered to 4%. Calpers, the biggest US pension fund, disclosed the sale of the stake on Monday. This came one month after the pension fund firm moved to selling 8% of its stake in Apollo.