Asking for raise as Apple contractor

Ok here’s the deal. I’m a contractor at Apple in Marcom. Technically speaking, I’m a salaried W-2 employee through my vendor. At the end of this quarter, I will have been at Marcom as a contractor for two years.

I’ve seen some other posts on Blind about contractors being 2nd class citizens at Apple (which is certainly true, but that’s another post). That said, I have a great working relationship with all my Apple full-time employee colleagues. I sit in an open studio right alongside them, and feel like I’m an integral part of the team. At the expense of my own humility, I’ll say that a number of my FTE colleagues have on several occasions expressed gratitude and appreciation for my work. I’ve never had a reprimand, mishap, mistake or any negative issues at the office. All in all, I feel like I’m doing a pretty kickass job and have the evidence to show for it.

So my question: what’s an appropriate amount for a raise?

I currently earn a salary of $190,000. Plus, through my vendor, I receive PTO, vacation, health & dental and 401k.

My last raise was one year ago when I switched from one vendor (where I earned a straight day rate, and that’s it) to my current vendor, at which point I received about a 5% cost of living raise and all the aforementioned benefits.

And I feel like that’s all a drop in the bucket compared to the salaries, bonuses & RSUs that Apple FTEs receive.

So should I ask for another 20%? 30% 40%?

Side note: The contractor situation is especially weird, because it’s in my vendor’s best interest for me to make as much as possible, since they’re basically skimming off the top.

Any thoughts/feelings/opinions at all related to being a contractor at Apple, especially in Marcom, are welcome!