Warren Buffett's Berkshire Hathaway once again scooped up shares of Sirius XM, boosting its stake in the satellite radio company to over 35%.The Omaha, Nebraska-based conglomerate purchased roughly 2.

Berkshire Hathaway first bought Apple ( AAPL -3.39%) shares in the first quarter of 2016. That was a wildly successful decision, as the "Magnificent Seven" stock has soared 797% since the start of that year (as of Jan. 31).

Berkshire Hathaway offers a promising investment opportunity with a strong portfolio and cash reserves, despite short-term risks. Explore more details here.