The $2 million purchase price thus represents a $1.5 million capital gain.
Those corporations aren't losing in this process, so there's no loss corresponding to a stockholder's capital gain on stocks.
If, as I am inclined to believe, your view can be widely extended, it will be a capital gain to the doctrine of evolution.
Personal income earned by the sale of assets, such as stocks or real property. The gain is the difference between the price paid for the asset and the selling price. Most conservatives want capital gains taxed at a lower rate than ordinary income in order to stimulate investment, whereas most liberals oppose a lower rate for capital gains as a subsidy for the wealthy.