In the USA most companies and corporations are effectively feudal. This is a meeting of dukes and earls attempting to avoid a socialist revolution through coordinated PR, which has been quite effective for the last 75 years or so.

Note that most public companies have institutional investors as the largest component of their ownership; such investors tend to own all the major competitors.

GM: top 5 are Capital World Investors, Vanguard, BlackRock, Berkshire Hathaway, and Harris Associates.

Ford: top five are Vanguard, BlackRock, Newport, State Street, Franklin.

Fiat-Chrysler: top five are Tiger, Harris, Baillie Gifford, Vanguard, Deutsche Bank, FMR.

Looks like Vanguard is certainly in a position to encourage the big-three car manufacturers to work together.

Intel: Tiger, Harris, Baillie Gifford, Vanguard, Deutsche Bank.

AMD: Vanguard, BlackRock, Wellington, FMR, Invesco.

Your CPU choices will make money for Vanguard.

HPE: Dodge&Cox, Vanguard, BlackRock, Primecap, State Street.

Dell: Temasek Holdings, Dodge&Cox, Elliott, BlackRock, Vanguard.

Apple: Vanguard, BlackRock, Berkshire Hathaway, State Street, FMR.

When you buy computers, you make money for Vanguard.

In summary, Tim Buckley at Vanguard can set up a meeting with any group of CEOs at minimal notice. He doesn't actually own much of anything, but the right of ownership for a large percentage of the USA's economy is a thing that he directs.

Or maybe it's Robert Kapito at BlackRock; same deal.