Shanghai Junshi Biosciences (HKG:1877, SHA:688180) said a major shareholder did not sell any shares as its reduction plan expired, according to an April 10 Hong Kong bourse filing.

Hong Kong-listed shares of the firm were up nearly 5% in Monday midday trade.

Shanghai Tanying Investment, which held about 5.8% of the company, had planned to reduce up to 2% of its stake between January and April.