Berkshire had previously held 10.4 million shares in the US industrial giant, according to earlier securities filings.
But GE was no longer listed among the 20 or so Berkshire stakes, according to the company's filing with the Securities and Exchange Commission.
Shares of General Electric are down nearly 20 per cent thus far in 2017, a stark under-performance compared with the index, which has risen more than 11 per cent.
GE has been hurt by weakness in its oil and gas business.
The company in June announced that longtime chief executive Jeff Immelt was retiring and would be replaced by GE veteran John Flannery. But a disappointing outlook during the company's July earnings conference call further pressured shares.
As Berkshire Hathaway exited GE, it added a 17.5 million share stake in Synchrony Financial, a credit card company spun out of GE in 2015.
Shares in GE dipped 0.4 per cent in after-hours trading to US$25.27, while Synchrony rose 4.4 per cent to US$30.95.