Subject: Re: Selling BRK pre/post meeting?
Now I've got a June 540 covered call against a long-held holding in a taxable account with a rather large unrealized gain, that I really don't want to get assigned and the gain realized.

I've been mightily tempted to sell calls the last few days. But I haven't for just this reason. I don't want long term gains in 2025 because I want to balance some long-term losses against short-term gains.

If BRK-B is still above 540 might need to buy shares the day before expiration (on margin) so those new shares will be the delivered lot. Will that work?

It works. I've done it a few times.

Note, logically it has to "work" because people who sell naked call options ALWAYS have to buy the shares to deliver when they are assigned.