Self Linking, Same IP Question

Hey guys... I originally wrote this and it sounded really confusing to me... hopefully this try makes more sense

I have 4 sites, SITE A, SITE B, SITE C, and SITE X. A, B and C are all money sites, and go after different niches in the same vertical. They all have very unique keyword sets, with very little crossover. Currently all sites are on the same IP address. None of the sites link to each other.

SITE X is the website for my company, which owns SITE A, B, C. If I put links on SITE X saying check out our properties, is this going to negatively impact SEO at all?


Thanks!

I dont think so , example is many seo firms provide hosting , and on their own website , they do list their success stories and sometimes they all are on same ip .

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