I have worked in the same building, for the same small auto insurance company, for 6 years as of yesterday. During that time however, my company has been "parented" or "owned" by 4 different companies, and we are up for sale again. It's odd, actually.... We started out owned by company A, who then was bought by company B. Company B had us merge with a similar small company they already owned, company V, so we're now sister companies. Then company B was bought by company C. After awhile, company C decided they didn't want to do auto insurance, so they sold us and V to company D.
Got all that? Now apparently company D has decided to get out of the Property and Casualty business, so they want to sell their whole P&C business, us included. Nothing is official yet, but I might have yet another company to work for by the end of this year, or early next year.
Fortunately we haven't ever put our parent company on our business cards, so I haven't had to get new ones with each merger! Crazy.