No, I mean people. Unless you count centralized exchanges that represent thousands to millions of users' pooled ETH, as people. Even then, the largest of these has about 2.5% of ETH supply.
For one, there's some risk in spreading your tokens across many wallets as an individual. That's more keys to keep up with that could be lost. Is it theoretically possible someone out there has spread their ETH holdings across 100 wallets and secretly hold 4% of the ETH supply? Sure, but it's unlikely given the distribution of exchange and smart contract wallet balances. If Binance, the world's largest centralized exchange for crypto has only 2.5% of supply, what are the odds there's an individual out there with more than that? They'd have had to be one of the earliest participants in ETH, but even Vitalik, the main founder only ever held about 1% at most (and from what I understand, currently holds less than 0.5%). Even the big ICO contracts that raised hundreds of millions in 2017 before the price really took off, never held that big of a supply. So either someone secretly mined 4% of ETH all these years while strategically accruing them in multiple wallets and never sold (so how did they fund their mining operations?)...or there's just not a whale out there like that.
You mean no single wallet?