If you have the 401k it's easy to buy Target stock. It used to be the default for the company match, but I think now you may have to select it if you want it.
IIRC Target stock is one of the investment choices for your 401k investments other than the match. On targetpayandbenefits.com you can select what percentage of your contribution you want to be in Target stock.
You aren't actually buying Target stock, but a sort of mutual fund that mirrors Target stock. In practical terms it makes no difference. The value of your investment goes up or down, and you get dividends and have voting privileges exactly the same as if you held the actual shares.
In my case I really lucked out. For 8 years my 5% match bought Target stock in the $50 to $70 range, mostly. When I quit I cashed out and rolled over my 401k into an IRA and the Target stock was about $83 a share.
I cannot stress enough how important it is to contribute at least 5% to your 401k! Target's match automatically doubles your money. That's a 100% return on investment, which is impossible to get anywhere else. I realize that voluntarily cutting your income by 5% may be really tough for many TMs, but if you bite the bullet now you will be amazed at how fast your 401k adds up, and that may make your life that much easier in the future.