Unfortunately spreadsheets can contain malware. I don't mean for that to be a reflection upon you, but maybe you look into using something that can be inspected without execution.
Discussion
I’m just trying to provide value to bitcoiners, what’s the best way for me to distribute my spreadsheets?
Unfortunately there isn't one.
https://superuser.com/questions/1603064/can-xlsx-contain-a-macro-virus
Best you can do is host it on github or something with a message that says something like: trust me bro...