How can we create > 330 quality weapons with a CEO?

Thanks

IPO them, sell until your CEO owns 24.99% or less.
Buy supplies at 215 to 220 quality.
Auto upgrade all corporations.

Also if they are in your own country your country can own stock (less than the CEO) and share the profit. Investment funds in your other countries can also own stock to help prevent hostile takeovers.

Seems to be a cap of 303.2 quality from a regular CEO corporation with 225 quality.

Anyone confirm?

And it looks like 336.9 for 250 quality.