MERCK & CO INC OPTION is a security (CUSIP 58933Y955) tracked across SEC portfolio filings. 9 institutional managers reported $235.0M on Form 13F as of 2026-06-30.
| Manager | Location | Value | Shares |
|---|---|---|---|
| JPMORGAN CHASE & CO | NEW YORK, NY | $91.0M | — |
| IMC-Chicago, LLC | CHICAGO, IL | $74.5M | — |
| SIMPLEX TRADING, LLC | CHICAGO, IL | $50.0M | — |
| GROUP ONE TRADING, L.P. | CHICAGO, IL | $15.2M | — |
| Maven Securities LTD | ST HELIER, Y9 | $4.3M | — |
| HRT FINANCIAL LP | NEW YORK, NY | $14K | 113,100 |
| Marathon Trading Investment Management LLC | RADNOR, PA | $12K | — |
| Capital Markets Trading UK LLP | LONDON, X0 | $397 | — |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | BIRMINGHAM, AL | — | — |