What financial moves can you do beforehand to protect some of your funds from divorce?

I'm in Oregon..Both 45, married 15, my (200k) income being twice as hers. She has great security and retirement benefits but I'm guessing courts don't care about that. Meanwhile I'll be lucky having a job 10 more years.

Got a 1M stock portfolio and 2 elementary kids. My 401K is 10% above hers (700k) so that likely will be left alone.

I intend to bring up the topic with her soon. What if anything I can do to avoid a full split down the middle?