How to merge companies without losing stuff?

[calico 3]

Trying to figure out the best way to go about merging companies. If they disband to join us they will lose all their stuff right? We were thinking we could claim all their land with stuff on it and after all that has been taken they can disband and join us, but would they still lose their ships? When my land was taken my ship was still mine so not sure how that works.

[MindOfMadness 98]

When you hold E on the player inviting you go to merge on the right side of the wheel that pops up.