Unusual Options Activity
MRK Unusual Options Activity - Merck & , (new)
- Last active day
- August 21, 2026
- Active days (30d)
- 20
- Biggest recent print
- Call $165.0000 · $2.9M
AI summary
On August 21, 2026, Merck & Company, Inc. (MRK) experienced notable options activity with a total of 10 prints. The call premium reached approximately $3.52 million, while the put premium was around $3.76 million, indicating a balanced interest in both calls and puts. The most significant print was a call option with a strike price of $165, expiring on September 18, 2026, which had a premium of about $2.91 million and a volume-to-open interest ratio of 14.0. On the put side, a notable print was for a put option with a strike price of $140, expiring on January 15, 2027, with a premium of approximately $2.55 million and a volume-to-open interest ratio of 7.1. Additional activity included various puts and calls with shorter expirations, including a call at $152.50 expiring the same day with a premium of $35,080 and a put at $145 expiring on October 16, 2026, with a premium of $285,500. Overall, the day reflected a diverse range of strike prices and expirations.
AI-generated summary
Prints on August 21, 2026
| Ticker | Side | Strike | Expiry | Vol/OI | Premium | IV | New |
|---|---|---|---|---|---|---|---|
| MRK | Call | $165.0000 | 09/18/26 (27d) | 14.0× | $2.9M | 29% | |
| MRK | Put | $140.0000 | 01/15/27 (146d) | 7.1× | $2.6M | 33% | |
| MRK | Put | $145.0000 | 10/16/26 (57d) | 5.3× | $286K | 30% | |
| MRK | Call | $152.5000 | 08/21/26 (0d) | 6.3× | $35K | 8% | |
| MRK | Call | $155.0000 | 08/28/26 (8d) | 3.8× | $578K | 35% | |
| MRK | Put | $150.0000 | 08/28/26 (6d) | 4.0× | $107K | 31% | |
| MRK | Put | $145.0000 | 08/28/26 (8d) | 2.4× | $116K | 30% | |
| MRK | Put | $148.0000 | 08/28/26 (8d) | 2.0× | $163K | 31% | |
| MRK | Put | $130.0000 | 12/18/26 (120d) | 1.8× | $406K | 35% | |
| MRK | Put | $140.0000 | 10/16/26 (55d) | 1.6× | $135K | 30% |
History
- 2026-08-2110 prints$3.5M calls$3.8M puts
- 2026-08-2019 prints$13.1M calls$5.2M puts
- 2026-08-1915 prints$12.4M calls$4.7M puts
- 2026-08-187 prints$615K calls$746K puts
- 2026-08-176 prints$941K calls$105K puts
- 2026-08-144 prints$465K calls$240K puts
- 2026-08-133 prints$90K calls$415K puts
- 2026-08-124 prints$2.5M calls$1.4M puts
- 2026-08-114 prints$2.7M calls$1.2M puts
- 2026-08-101 prints$134K calls$0K puts
- 2026-08-054 prints$1.1M calls$220K puts
- 2026-08-047 prints$1.4M calls$436K puts
- 2026-08-034 prints$542K calls$217K puts
- 2026-07-311 prints$236K calls$0K puts
- 2026-07-303 prints$0K calls$641K puts
- 2026-07-294 prints$0K calls$912K puts
- 2026-07-281 prints$0K calls$271K puts
- 2026-07-242 prints$454K calls$0K puts
- 2026-07-232 prints$883K calls$0K puts
- 2026-07-222 prints$557K calls$0K puts
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