Smart money is quietly loading 5 stocks

This scan compared the 2026-03-31 13F window against 2025-12-31 across all five watchlist managers (Berkshire Hathaway, Bridgewater Associates, Renaissance Technologies, Citadel Advisors, Two Sigma Investments). Of 8,472 unique CUSIPs touched by the group, 773 passed the acceleration filter (net buyers exceed net sellers, ≥25% aggregate share growth or ≥2 new positions). After excluding mega-cap retail favorites, illiquid microcaps, and names already trending hard, five U.S.-listed names survived: LEN, NYT, PCAR, MMM, MKSI. The single most surprising finding is the magnitude of Berkshire's first post-Buffett quarter under Greg Abel. Abel did not retreat — he tripled the New York Times stake from 5.07M to 15.15M shares (a +199% Q/Q add worth roughly $920M of incremental commitment), opened an entirely new $2.65B Delta Air Lines position, and added 43% to Lennar. Notably, DAL was DROPPED from the final list despite being Berkshire's most attention-grabbing Q1 move — the stock has already rallied 22% in six trading days to a 52-week high with universal analyst upgrades, so the Buffett-airline-reversal trade is now consensus. The names below are where the institutional bid is visible but retail hasn't crowded in.