It’s been a long time since I’ve seen it, but as far as I remember, you didn’t really miss anything. Below is the wikipedia summary of the last shot, and that’s basically the same as I remember.
From wikipedia summary
As the credits roll, the helium transport is depicted entering Earth’s upper atmosphere. News reports describe how Sam’s testimony on Lunar Industries’ activities has stirred up an enormous controversy, and the company’s unethical practices cause a significant dip in stock value.
It’s pretty brief though, and (IIRC) delivered largely via audio-montage.