JST Group (HKG:6687) said its underwriters fully exercised the overallotment option of its Hong Kong listing, and the stabilization period of its initial public offering ended on Saturday, according to a Sunday Hong Kong bourse filing.

Shares of the Chinese e-commerce SaaS ERP provider were down 2% in Monday's late-morning trade.

The company will issue 10.2 million shares at HK$30.60 each for additional net proceeds of about HK$300.3 million.

Listing of the new shares will begin on Nov. 19. The company said its public float will remain at about 61.6% following the allotment.