Can I get a clear answer: How late can I exercise options on Friday (CRWD example)

So CRWD was added to SP500 around 515pm est.

If I had 350c expiring today..

1) What is the latest I could exercise them?
2) Do I have to call in customer support at IB or do I do it online?

Thank you.

ps...I tried asking customer support but they are always unclear.

 

IIRC 530 Eastern.

 

https://www.interactivebrokers.ca/en/trading/exerciseCloseout.php

 

If the stock is above your exercised price the exchange will exercise automatically.

 

thanks. But I may be reading it wrong. IB site says 430pm est:

https://www.interactivebrokers.ca/en/trading/exerciseCloseout.php

how are you getting 530? and what is IIRC?

 

even if the stock move occurs after hours , it is 5pm or 530pm or?

 

NASDAQ reads 530 ET

 

…

 

i think OCC is 530 but brokers have earlier cutoffs. Etrade I think is best efforts after 4.

 

The time is irrelevant. If it were a question of being right at the exercise price that would be where IB would come in. But in this case the stock was well above that at $365. Do you really this they’re just going to let the seller of that Call have all that money?