How does the CMO of Unity have $13m worth of stock while only having worked there for one year?

I was reading this article
https://www.marketbeat.com/instant-alerts/nyse-u-sec-filing-2023-03-10/

And apparently she sold about $1m worth of the stock recently but still has over $12m worth? How?

I'm having a hard time seeing how it adds up especially considering unity share price had continuous been falling, which means the value at the time of purchase should have been even higher.

Even if she is 100% compensated via stock, it seems way too high for one year unless she purchased like $10m worth of the stock with her own money which i doubt. Can someone help me make sense of this?