MERCK & CO INC's ticker is and the CUSIP is 58933Y905. A total of 9 filers reported holding MERCK & CO INC in Q4 2017. The put-call ratio across all filers is - and the average weighting 1.1%.
Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| SABBY MANAGEMENT, LLC | 17,188 | $98,797,000 | 4.11% |
| MUFG Securities EMEA plc | 256,000 | $14,715,000 | 3.82% |
| Timber Hill LLC | 530,500 | $30,493,000 | 0.14% |
| Virtu KCG Holdings LLC | 59,900 | $3,443,000 | 0.07% |
| SIMPLEX TRADING, LLC | 859 | $204,000 | 0.02% |
| Citadel Advisors | 358,900 | $20,630,000 | 0.02% |
| Allianz Asset Management GmbH | 78,000 | $4,483,000 | 0.01% |
| SG Americas Securities, LLC | 310,000 | $354,000 | 0.00% |