I'm not sure if this strategy will work for the sale of equities but I'll outline it since I'm pursuing it as an option for a property sale what will net me a similar seven figure payout. It's called a structured sale annuity, some times referred to as simply a structured sale. It is essentially an installment sale but it differs a little in that the purchaser doesn't pay you over a period of years. The purchaser pays the entire amount at the time of the sale. You choose to receive as much as you want at the time of sale (and pay taxes accordingly) and the rest is paid to a 3rd party, an assignment company, who in turn purchases a annuity from a highly rated life insurance company at the terms you specify. The life insurance company will provide a yearly payment based on the going rate for annuities with the terms you're looking for.
The IRS has ruled that because the assignment company purchased the annuity, with you as the beneficiary, you do not actually "earn" the income until the money is paid to you. So every year you would have some taxable income. This is particularly appealing to someone looking to retire because if your yearly payments are small enough that it keeps you in all the 0% tax brackets (not as valuable if all your income is ordinary income since the threshold for paying no tax is much lower than long term capital gains) then you pay no Federal tax. You'll still pay state tax but there could be substantial savings to be had.
I did the rough math on how a 30-year payout of a seven figure annuity compares to taking the seven figures immediately, with the log term capital gains hit, and investing it and the return is about the same due to the tax savings. So if you had other money invested and wanted a diversification from owning nothing but index funds or other equities, this option could be appealing. This option probably would not be appealing if you planned to continue earning income since that would kick you into higher tax brackets every year you have the annuity income.
Again, I'm not sure if you can do something like this with a sale of stocks or options but I'm just throwing it out there as something you might want to investigate.