depending on the location, Wells Fargo spits out $50s and Chase disses out $100s. Not all locations have large bills for these 2 banks here in the DMV region.

The ATMs in the casinos all offer Benjis. I think that at least at Chase branches you have a choice of denominations and $50s are available, too.

You can choose the mix of $20s and $100s at the US Bank ATM (drive up ATM at a US Bank branch) here in Minneapolis.

Their ATM's give you a choice of denominations when making a withdrawal. I have no problem getting 50's (no hundreds though).

My credit union may or may not be in your area (I don't know where you are), but opening an account at any credit union near you that gives $100's at their ATM's might be something you can look into.

Capital One Bank dispenses 100s, 50s, 20s, 10s and even 1s.. I often take $100 in $1s to Florida when I go there for my strip club fix.

The OP was about ATMs, but most of the answers have named banks, which is non-responsive because the various branches of a bank often have different models/ages of ATM installed and/or have different settings on them.  Some Bank of America ATMs in my neighborhood dispense $100 bills, some do not.  Some nearby Citi ATMs display "This machine dispenses $100 and $20 bills" when idle, but do not in fact give $100 bills at all.  The ATMs outside that Citi location do not even claim to give out $100 bills, only the ones inside the lobby.  

So a decent answer to the implied question needs to be quite specific.

This year they started with $100 bills.  They only operate in Eastern Massachusetts.. so I expect it will be coming to most ATM's

WF has 50s which for my money is better and less gangsta than benjis. Also I try to keep withing a reasonable budget so won't be carrying around 700+

I've become a fan of providers that accept electronic forms of payment. I only hobby when I travel, and carrying cash gives me the willies... 🤷🏻‍♂️

Wells Fargo has despensed $100 Bills.