Berkshire Hathaway Trims Its Apple Investment and Has $189 Billion in Cash

Berkshire Hathaway (BRK.A -0.56%) (BRK.B 0.07%) reported first-quarter results on Saturday, and there's quite a bit to unpack. In addition to the headline revenue and earnings numbers, investors always watch Berkshire's cash stockpile, buyback activity, and the operating income from its subsidiary businesses. With that in mind, here's a rundown of the key numbers, a major investment move that was revealed, and the important information we don't know yet. The headline numbers (which don't mean much) Warren Buffett himself has …