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Something to keep an eye on: Mostly large institutional traders are showing a long build up in $MRK. Net option volume delta is 335 K!
Unusual Option Volume

MRK Merck Common (New)153.14+3.64 (+2.4%)

Merck Common (New) trades 33,898 contracts. MRK will report earnings on Oct 29, 2026. The company has the following event: Playing with Heart educational program between Apr 1, 2026 and Oct 31, 2026. News: U.S. FDA Approves Update to the Label for WINREVAIR (sotatercept-csrk) to Include Data from the Phase 3 HYPERION Trial Evaluating Adults Recently Diagnosed with Pulmonary Arterial Hypertension (PAH, WHO* Group 1 Pulmonary Hypertension)
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Large Decrease in Open Interest

MRK Merck Common (New)143.24-0.76 (-0.5%)

The open interest (OI) on the 18-Sep-26 100.00 strike decreased by 14,625 call contracts and was unchanged for puts. The total OI for the expiration was decreased by -41,067. View Open Interest
Unusual Option Volume

MRK Merck Common (New)144.79+0.86 (+0.6%)

Merck Common (New) trades 174,757 contracts. MRK will report earnings on Oct 29, 2026. The company has the following event: Playing with Heart educational program between Apr 1, 2026 and Oct 31, 2026. News: Perspective Therapeutics Announces Clinical Collaboration and Supply Agreement with Merck to Evaluate [212Pb]PSV359 in Combination with Keytruda (Pembrolizumab) in FAP-a Positive Solid Tumors
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Unusual Option Volume

MRK Merck Common (New)144.22-0.49 (-0.3%)

Merck Common (New) trades 18,226 contracts. MRK will report earnings on Oct 29, 2026. The company has the following event: Playing with Heart educational program between Apr 1, 2026 and Oct 31, 2026.
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Large Increase in Open Interest

MRK Merck Common (New)150.51-2.04 (-1.3%)

The open interest (OI) on the 18-Sep-26 165.00 strike increased by 26,234 call contracts and 15 puts. The total OI for the expiration was increased by 27,452. View Open Interest
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