My passive investments are about 5-10% REIT (been awhile since I rebalanced so I'm not sure, the target is 5%).
That said, my 'active' investment of late was buying a mixed use commercial building a couple of months ago.
The building needs a ton of work - about 6 months of hard labor, maybe 8 months. The price was a total steal because no passive RE investors wanted to buy it. In dollar terms it is a huge percentage of my total investments, but it is also my job now, so I'm not sure how to calculate it.
That said, if I can finish the work on time and on budget then I'll be FIRE about 15 years ahead of schedule, and just it time for the salmon runs this fall.