Their terms will expire at the 2022 annual stockholders meeting.
Two cruise veterans
Aronson, founding partner of ACON Investments, a middle market private equity group, joined the board in August 2015. Until May that year, Aronson was Royal Caribbean Cruises Ltd.'s longest serving outside director, having been an RCL board member since 1993.
Hanrahan, who spent 13 years in key roles at Royal Caribbean Cruises Ltd., including leading Celebrity Cruises, before taking a job outside the travel sector, joined Lindblad's board in May 2017.
And Bisnow, the co-founder of Summit, a global collective that hosts eclectic events for young social entrepreneurs and leaders, has been a Lindblad director since late 2017.