Warren Buffett’s Berkshire Hathaway is now the largest single shareholder of Bank of America — but that’s not the only piece of Wall Street he owns.

Buffett, 86, is also the biggest shareholder of Wells Fargo, with a little under 10 percent of the San Francisco bank, and US Bancorp, a Minneapolis bank that’s among the largest in the country.

In addition to those holdings, he’s also the seventh biggest owner of Goldman Sachs and Bank of New York Mellon — and the eighth largest shareholder of M&T Bank, a Buffalo bank with $16.5 billion in assets.

While he has a powerful voice in the boardrooms of a handful of the world’s biggest banks, none of his stakes are more than 10 percent — the threshold where additional regulation by the Federal Reserve kicks in.

Buffett, who tends to get listened to when he speaks, has been more of a passive investor in banks, but can have a major sway in how banks operate, said Dick Bove, analyst at Rafferty Capital Markets.

“Based upon his public statements, he’s a strong believer in what the bank regulators believe, which is that banks should stick to banking,” he said.

While Buffett was instrumental in removing John Stumf as CEO of Wells Fargo in the wake of the fake accounts scandal, he probably won’t be piping up too much any time soon.

“Why would you worry more about Warren Buffett than some mutual fund complex?” one prominent banking lawyer told The Post.