(Yicai Global) May 27 -- FTSE Russell, the world's second-largest stock indexing firm, plans to add 1,097 Chinese mainland-listed stocks to its global benchmarks on June 21 this year.

The companies, including 292 large-caps, 422 mid-caps, 376 small-caps and seven micro-caps, make up a fifth of all companies listed on the mainland, the London-based company said on May 25. Another 40 percent of companies will join in September and the remainder will enter the indexes in March.

FTSE will also become the first company to include shares from the ChiNext board, which tracks growth enterprises listed in Shenzhen, it said. The company has set up the FTSE China A innovative Enterprises Index to follow the board. 

Founded in 2009, the Nasdaq-like ChiNext aims to attract innovative, fast-growing companies and has lower thresholds for listing applicants than Shenzhen's main and small- to medium-enterprises boards. It now hosts 751 stocks with a market cap of around USD800 billion, making up a quarter of Shenzhen bourse's total.

Editors: Zhang Yushuo, James Boynton