BLACKROCK INC — institutional ownership

6 funds reported holding BLACKROCK INC in their latest 13F filings, worth $247M in total (CUSIP 09290D951).

Largest holders

1. Optiver Holding B.V. — $111M
2. IMC-Chicago, LLC — $105M
3. SIMPLEX TRADING, LLC — $14.4M
4. JPMORGAN CHASE & CO (JPM, AMJB, VYLD, JPM-PC, JPM-PD, JPM-PJ, JPM-PK, JPM-PL, JPM-PM) — $8.84M
5. GROUP ONE TRADING LLC — $3.94M
6. HRT FINANCIAL LP — $3.65M