Warren Buffett fans eagerly anticipate Berkshire Hathaway's quarterly 13F filings, which tell investors what stocks the holding company bought and sold over a three-month period. The 2023 fourth-quarter filing was released last week, and it showed that Berkshire Hathaway sold out of four positions -- Markel, Global Life, D.R. Horton, and StoneCo (STNE 2.00%).Berkshire invested in StoneCo's initial public offering (IPO) in 2018, and it's down 48% since then. Did Buffett and his team give up on it? And what s ...