A fund's size isn't known until the door shuts

In private markets, nobody knows a fund's size until the door shuts. That's the final close. Say a fund holds a first close at eight hundred million. Then it keeps adding investors. Usually for twelve to eighteen months. Its final close lands at two point one billion. One point three billion more than the first close. Late investors usually pay the fees they missed, plus interest. After that, no one else can join. It's not the end of buying. That's the investment period. So why do investors care? It's the number a fund is judged by, and where it lands in league tables. The door shuts. The number sticks.