annual meeting

The 2021 Annual Meeting of Stockholders will be held on June 15, 2021 at 8:30 a.m. ET in virtual format only.

Stockholders will not be able to attend the Annual Meeting in person, but instead will be able to attend virtually. You will be able to participate in the annual meeting, vote your shares electronically and submit your questions during the live audio webcast of the meeting by visiting www.virtualshareholdermeeting.com/BLUE2021 and entering your 16-digit control number found on the voting form that was enclosed with the proxy materials for the Annual Meeting that were previously distributed. If a stockholder encounters any difficulties accessing the virtual meeting during the check-in or meeting time, please call the technical support number provided.

www.virtualshareholdermeeting.com/BLUE2021

Annual Meeting Materials