These 4 companies look Amazon-proof

The Jeff Bezos-led juggernaut is armed with a war chest of cash and it hasn't been shy about throwing its weight around in the past couple months, disrupting every industry in sight.

Its $13.7 billion acquisition of Whole Foods threw the whole grocery industry into disarray, while Blue Apron's battered IPO price ended up as collateral damage. Its newly-announced partnership with Nike sent the likes of Dick's Sporting Goods and Under Armour tumbling. Heck, even the payments industry is facing a major, Amazon-led shake-up.

But there are still a few bright spots, says RBC Capital Markets - companies whose existing business models have created a natural insulation from Amazon, as well as those that have been quick to adapt.

Here are four such corporations highlighted by RBC in a recent client note: