Shares of BioHiTech Global Inc. /zigman2/quotes/206617127/composite BHTG +1.21% rocketed 41.5% to pace all premarket gainers in active trading Thursday, after the waste management company said it has expanded its relationship with cruise operator Carnival Corp. /zigman2/quotes/202325446/composite CCL +7.02% /zigman2/quotes/210414141/delayed UK:CCL -3.26% , including the coverage of fifteen additional cruise ships. Trading volume swelled to 7.9 million shares, compared with the full-day average of about 2.3 million shares over the past 30 days. Carnival's stock rose 2.1% ahead of the open. BioHiTech said it recently received purchase orders for more than $1.8 million worth of food digesters, which the company expects to fulfill during the second and third quarters of 2021. The company had recorded a total of $2.0 million in revenue over the second and third quarters of 2020. BioHiTech's stock has run up 55.4% over the past three months through Wednesday, while the S&P 500 /zigman2/quotes/210599714/realtime SPX +1.56% has gained 7.1%.