I'm not a wikipedia editor, so they may think of things differently, but when I see a news story about a company, I generally think, "Interesting."
I don't think, "Ooh, I better check if this is in their Wikipedia article yet." Now, maybe the most devout of wikifiddlers will do that, but why not just make it part of your process? If it's not notable, presumably someone will delete that bit eventually. It's better than going to an article and finding that there's no news since 2009 or whenever the article was first written.
Maybe if there's a process for a pull-request like feature, similar to github, but what a company thinks is newsworthy may not be, or it may be newsworthy for a different reason than the company thinks it is, like a product that exploded on the launch day.
I don't think, "Ooh, I better check if this is in their Wikipedia article yet." Now, maybe the most devout of wikifiddlers will do that, but why not just make it part of your process? If it's not notable, presumably someone will delete that bit eventually. It's better than going to an article and finding that there's no news since 2009 or whenever the article was first written.