The first sat of one of the bitcoins from the famous Pizza transaction
Pizza Sats celebrates first commercial transaction of 10,000 bitcoins used to pay for two pizzas in 2010.
There are therefore 10,000 pizza alpha sats (the first satoshi of one of the bitcoins resulting from this transaction). But only 3,732 have been active over the past 4 years, and 379 are isolated and sequestered by collectors.