Just one data point: I'm a startup founder and have no issues showing potential employees (almost) all the investors on our cap table and who led or was a major

Just one data point: I'm a startup founder and have no issues showing potential employees (almost) all the investors on our cap table and who led or was a major investor in each round. In general, the only thing that's sensitive is exact ownership percentage of each investor. We do have one small angel investor from our first funding round that asked us not to publicly name them as an investor, so we just don't include them when we share the cap table. That's a rare situation, though, in my experience. This investor is relatively high profile in their non-angel-investing life and they don't want to publicize angel investments. And the number of fully diluted shares, the ownership percentage that the prospective employee's grant equates to, the strike price of the options, and the price that investors paid (and valuation) of the last round should absolutely be shared with you.