I don't own Millrose Properties shares and am not trying to pump the stock. I am postulating that MRP may be one of the confidential stocks omitted from the Berkshire 13F. There may be more than one since there was larger activity in the Harney Investment Trust, Berkshire's go-to vehicle to hide confidential trades at National Indemnity.

Berkshire received MRP stock as a spin-off from Lennar in Q1. We know they got the stock. But there is no record in the Q1 NAIC filing of Berkshire selling the stock in Q1. Then the stock doesn't show up at all in Berkshire's 13-F.

Since then, there has been a steady stream of insider purchases of MRP stock reported.

dataroma.com: Real Time Insider Data - DATAROMA

(link opens up a list of the insider activity in MRP stock since the spin-off)

Lennar would have been a Ted or Todd investment. Maybe they like the SpinCo and are adding?

Beats me