Event Details

2022 Annual Meeting of the Stockholders

July 28, 2022 08:30 AM ET

The 2022 Annual Meeting will be a virtual meeting and stockholders of the record date 6/9/2022 may participate online at https://www.virtualshareholdermeeting.com/ATHX2022 on July 28, 2022 at 8:30 AM Eastern Daylight Time.

To attend the Annual Meeting, you will need the 16-digit control number located on your proxy card. If you do not have your control number, please reach out to your broker to attain it. Please keep your control number in a safe place so it is available to you for the meeting. Please allow ample time for online check-in, which will begin at 8:15 AM EDT.