Your profile shows you as a Buyer and Seller. As a Buyer and Seller on Trulia, you shouldn't have a company listed as part of your profile.
If you have a second profile that is categorized as a Real Estate Pro, you can edit your company by hovering over you username in the top-right corner and click on "Profile". Then click on "Edit profile" on the left-hand side of the page. Scroll to the "Company" text-field to add your updated company info.
Make sure to scroll to the bottom to save your changes.
Hope this helps!