Are Treasury Bills subject to the $10,000 reporting rule?

I'm at the point in life where safe money matters more than maxing out the growth potential if it involves risk. For the money I have in my checking/savings that I won't necessarily need in less than 28 days I think short term Treasury Bills are a perfect option for me.

I don't know much about large cash transactions other than knowing anything $10,000 and over in cash needs reported in some way. I'm assuming a transfer from my checking/savings to Treasury Direct is considered a "cash transaction". When that money comes back to me do I need to report it or are Treasury Bills not subject to that $10,000 rule?