Billionaire investors appear to see good times ahead with a fellow billionaire in the White House.

Warren Buffett, Carl Icahn, David Einhorn, Dan Loeb and Bill Ackman have been making some major investment moves in recent months, as revealed in regulatory filings with the Securities and Exchange Commission this week. They've invested millions, if not billions, of dollars in companies like Apple  (AAPL) - Get ReportHerbalife  (HLF) - Get ReportChipotle  (CMG) - Get Report and Goldman Sachs  (GS) - Get Report . And investors would be wise to pay attention: the five have a combined estimated net worth of about $98 billion. 

A number of the men have weighed in one way or another on President Donald Trump, who claims to be a billionaire in his own right.

While Buffett was a vocal supporter of Hillary Clinton on the campaign trail, he expressed openness to Trump after the election, telling CNN's Poppy Harlow in November it's "very important that the American people coalesce behind the president." 

Fellow octogenarian Icahn is on the opposite end of the spectrum, politics-wise. The activist investor backed Trump's candidacy early on and since the election has been tapped to advise the president on regulations.

Loeb has admitted Trump's victory took him by surprise, but he's shuffling his portfolio accordingly.

We combed through the regulatory filings of these big-named investors to decipher how they're positioning themselves in the era of Trump. (13F filings, required from institutional investors by the SEC, are released 45 days after the end of each calendar quarter.) 

Here are some of the biggest buys (and sells) lately out of Wall Street's best and brightest.