Jamie Justice was at the Longevity Summit this year to give an update on how things are going. They expect a total of about 500 contestants (groups) in total, and were up to 488 at the time of the presentation.
Additionally, the billionaire Lululemon founder looks to have contributed $10 million for a special muscular dystrophy add-on contest. You may have heard here on the site about Chip Wilson previously - as he is a rapamycin enthusiast: 15 longevity leaders who take rapamycin - #11 by RapAdmin
While the total number of contestant groups is anticipated to be about 500, it seems likely that the group will quickly get winnowed down to the top 100 or so really serious teams. And from the sounds of it, there were a number of really wacky applications (as you might expect in longevity contests) that were flat out rejected even before they could apply to join.
Here are some of the slides from Jamie’s presentation, which will give you a quick overview of how things are progressing: