Note: The range selector at the bottom of the graph will show more accuracy in rates, when utilized. According to the chart Moderna (MRNA) experienced the highest closes of all of the participating companies involved in producing and distributing a Covid-19 coronavirus vaccine. During the last 5 years (MRNA) held a maximum close equal to ~491 in August, 2021.
Since then, Moderna's stock closing rates have fallen and not experienced such heights since.