It's 141,686 coins being moved
https://mempool.space/address/1JbezDVd9VsK9o1Ga9UqLydeuEvhKLAPs6
Here is the PR from the trustee:
https://www.mtgox.com/img/pdf/20240528_announcement_en.pdf
They are starting to distribute coins.
It seemed to me like they were just consolidating everything, likely to make payouts easier on themselves in the future. My understanding is that no actual BTC has been distributed to anyone yet though and from the notifications I've received it seems like they're telling people not to expect anything until October, but maybe they're attempting to underpromise and overdeliver. I know I will be excited the day I get that email telling me some BTC has been deposited into my exchange account. I had given up hope on ever seeing these coins again several years ago.