Smart money is quietly loading 5 stocks

We compared the Q1 2026 (reportDate 2026-03-31) 13F-HRs against Q4 2025 (reportDate 2025-12-31) across the five-fund watchlist — Berkshire, Bridgewater, Renaissance Technologies, Citadel, Two Sigma. All five funds returned two clean filings. 898 raw CUSIPs showed some net accumulation; after applying the multi-fund consensus filter (net buyers > trimmers, aggregate shares +25% Q/Q or ≥2 new positions, put-option exclusion, single-fund concentration cap) and the retail-attention rails (sub-$1B mcap drops, ETF drops, mega-cap retail-favorite drops, WSB/StockTwits hotlist drops), five stocks cleared cleanly: TECK, MKSI, NTRS, NPO, and VCYT. The single most surprising finding is who is NOT on this list: Berkshire's loudest Q1 moves — a +204% block buy of Alphabet Class A, complete exits from Amazon, UnitedHealth, Mastercard, Visa, Domino's, Pool Corp, and a 95% cut of Constellation Brands — were entirely solo trades. None of Buffett's accumulations overlapped with what the quants and Bridgewater were building. The two camps are pointing different directions this quarter: Berkshire is rotating inside mega-cap, while the quant/macro cohort is moving down-cap into copper, semi-cap equipment, custody banking, industrial sealing, and reimbursed diagnostics. The five names below are where that quant/macro cohort overlapped.