Expiring Calls Today. What Will Happen?

https://preview.redd.it/per80dovcnoe1.png?width=1032&format=png&auto=webp&s=b51785b63f752f12456179b5bf020b926a0bb4f6

With large number of $40.50 call expiring today, I was wondering what will institutions do today? Trying hard to keep the stock price flat and let the options expire?