If you're getting it 40% off or something, yes. If you're not getting it discounted (or with a special tax benefit somehow), then no. You don't want to tie your portfolio's success into where you get your income from. If the company goes bust, you're double screwed. It's not "diversification" to put a bunch of money in one stock. And your company's REIT will be in the index funds you already own. REITs are about 5% of VTSAX for example.