I'll address the Wikipedia portion of the question specifically:
Do I need to name this company's status (e.g. "According to [company], market leader in [technology], ...") to validate the source? If so, would simply citing Wikipedia for this fact suffice, assuming their prevailing status on the market needs to be proven as well?
Since Wikipedia content can be changed at any moment, any citation to a Wikipedia article needs to refer to a specific revision of the article. And of course, that revision might just reflect one person's view, and that one person might or might not have a conflict of interest, which might or might not be discernible to the reader.
If you want to use Wikipedia to justify something like this, you'll need more than just the article. You might find that a statement like "company A is a leader in industry B" has footnotes; if so, look at those footnotes and see if one or more of them is worthy of citation. (A news article from a well-respected publication, that actually says that? Yes. Somebody's LinkedIn profile? No.) Or, by visiting the Wikipedia article's talk page, you might find that several Wikipedia editors have discussed the point, and decided that it belongs in the article for various reasons. Or, again by looking at the talk page, you might find that the article went through one of Wikipedia's formal peer review processes (like "featured article" or "good article") and that the statement withstood challenges in that discussion.
In any of those cases, the thing to cite is not the Wikipedia article itself, but the stuff that justifies the statement in the Wikipedia article. That is, the news publication used as a footnote, or the discussion on Wikipedia's talk page, or the Wikipedia review page.
Disclaimer and statement of expertise: I have been a Wikipedia editor since 2006, I run a business advising companies on Wikipedia engagement, and I designed the Wikimedia Foundation's first program to engage university professors in assigning Wikipedia writing to their students.