Smart money is quietly loading 5 stocks

Scan compared the 2026-06-30 13F window (filed Aug 14) to 2026-03-31 across Berkshire, Bridgewater, Renaissance, Citadel and Two Sigma — all five funds returned holdings. Roughly 977 CUSIPs cleared the mechanical accumulation filter (net buyers > net sellers, ≥25% Q/Q aggregate share growth or ≥2 new positions). The top-25 by aggregate dollar delta was culled to five names that also survived the retail-attention screen — Seagate (STX) dominated on delta but was dropped: shares are up 445% year-over-year on HAMR/AI-storage hype, r/wallstreetbets is actively long, and 22 sell-side buy ratings sit against one sell. That's not quiet accumulation anymore.

The single most surprising finding: Intercontinental Exchange (ICE) drew brand-new positions from three separate managers — Bridgewater, Renaissance, and Two Sigma — in the same quarter, while Citadel added 73%. That coincidence pattern (one macro shop plus two quants opening simultaneously at $90B market cap) is uncommon and predates the Polymarket close by roughly two months. The other four picks — CME, MPWR, MCK, MDT — sit in structurally low-attention sectors (exchanges, power-management semis, drug distribution, med-devices) where quant plus macro accumulation carries more signal than in AI-adjacent names.