MRK · Option chain

MRK Option Chain

Every listed MRK strike within 25% of spot, across the next 6 expirations — calls and puts side by side with last price, volume and open interest, plus the closing bid and ask.

Open interest and pricing as of the close on 2026-09-03. Recomputed every morning before the open.

Spot

$152.34

Call open interest

131,140

Put open interest

36,676

Put/call (volume)

0.34

7,741 contracts changed hands across these expirations — 5,796 calls against 1,945 puts. Calls outtraded puts 2.98 to one.

Sep 11, 20266 days

call OI 4,582 · put OI 2,731

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	35.50 / 38.65	—	—	115	—	0.00 / 2.13	—	1
—	34.50 / 37.35	—	—	116	—	0.00 / 2.13	—	2
—	33.50 / 36.60	—	—	117	—	0.00 / 2.13	—	30
—	33.00 / 35.30	—	2	118	—	0.00 / 1.36	—	14
—	31.75 / 34.30	—	—	119	—	0.00 / 1.35	—	15
—	30.50 / 33.15	—	1	120	—	0.00 / 0.83	—	53
—	29.50 / 32.60	—	7	121	—	0.00 / 0.94	—	5
—	28.95 / 31.70	—	10	122	—	0.00 / 1.02	—	106
—	27.55 / 30.15	—	1	123	—	0.00 / 1.01	—	9
—	26.95 / 29.10	—	1	124	0.01	0.00 / 0.27	2	2
—	25.95 / 28.25	—	32	125	0.02	0.00 / 0.09	4	54
—	24.55 / 26.90	—	2	126	0.01	0.00 / 0.11	36	42
—	23.55 / 26.05	—	11	127	0.01	0.00 / 0.14	2	16
—	22.55 / 25.40	—	22	128	0.01	0.00 / 0.04	27	19
—	23.15 / 24.35	—	6	129	—	0.01 / 0.05	—	85
—	20.55 / 23.25	—	41	130	0.02	0.01 / 0.03	30	44
—	19.95 / 22.40	—	12	131	0.15	0.01 / 0.13	1	296
—	18.95 / 20.85	—	5	132	—	0.01 / 0.13	—	26
18.22	18.00 / 19.90	3	296	133	0.01	0.00 / 0.17	20	20
16.70	16.55 / 18.95	7	14	134	—	0.00 / 0.50	—	67
15.56	15.95 / 17.90	1	37	135	0.06	0.00 / 0.06	34	112
—	15.00 / 17.25	—	604	136	—	0.00 / 0.55	—	34
—	14.00 / 15.90	—	302	137	—	0.00 / 0.25	—	20
—	13.00 / 15.15	—	101	138	0.08	0.00 / 0.15	32	51
—	12.00 / 13.95	—	192	139	0.14	0.05 / 0.24	5	11
10.46	11.65 / 13.20	10	128	140	0.11	0.01 / 0.21	3	48
—	9.65 / 12.00	—	8	141	0.11	0.00 / 0.21	1	20
9.99	9.30 / 11.10	1	76	142	0.08	0.04 / 0.28	6	29
—	8.15 / 10.10	—	6	143	0.29	0.07 / 0.38	6	189
7.83	7.20 / 9.20	1	4	144	0.46	0.01 / 0.44	1	47
7.06	6.65 / 8.20	6	778	145	0.30	0.21 / 0.42	33	222
6.60	6.05 / 7.40	14	22	146	0.46	0.22 / 0.50	1	33
5.75	5.20 / 6.65	8	286	147	0.60	0.34 / 0.61	6	24
—	4.45 / 5.55	—	49	148	0.81	0.54 / 0.96	21	30
4.50	3.60 / 4.50	21	129	149	0.95	0.79 / 1.02	117	305
3.54	3.20 / 3.95	26	269	150	1.37	0.95 / 1.33	33	490
2.20	1.82 / 2.40	49	162	152.5	2.43	2.00 / 2.37	15	55
1.14	0.94 / 1.28	111	197	155	—	2.95 / 4.20	—	60
0.54	0.50 / 0.81	25	51	157.5	—	5.30 / 7.05	—	28
0.20	0.02 / 0.30	20	238	160	—	7.45 / 9.30	—	15
0.13	0.00 / 0.50	1	57	162.5	—	9.65 / 11.70	—	2
0.19	0.00 / 0.26	32	317	165	—	11.85 / 14.35	—	—
0.05	0.01 / 0.07	20	25	167.5	—	14.70 / 16.65	—	—
0.03	0.01 / 0.07	11	8	170	—	17.10 / 19.35	—	—
0.01	0.00 / 0.01	7	25	172.5	—	19.70 / 21.65	—	—
0.01	0.00 / 0.01	2	26	175	—	22.00 / 24.15	—	—
0.01	0.00 / 0.01	1	5	177.5	—	24.70 / 26.65	—	—
0.01	0.00 / 0.01	1	1	180	—	26.90 / 29.15	—	—
0.01	0.00 / 0.16	1	—	182.5	—	29.50 / 32.05	—	—
0.01	0.00 / 0.07	3	14	185	—	32.10 / 34.60	—	—
0.01	0.00 / 0.13	1	2	190	—	36.70 / 39.15	—	—
A dash means the contract did not trade — not a price of zero.

Sep 18, 202613 days

call OI 95,788 · put OI 19,373

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
37.30	36.50 / 38.10	52	2,091	115	0.01	0.00 / 0.06	4	2,119
31.60	30.95 / 33.15	3	2,665	120	0.04	0.00 / 0.08	3	4,482
—	26.05 / 27.90	—	2,799	125	0.03	0.03 / 0.10	15	2,030
22.24	21.05 / 23.20	53	4,122	130	0.08	0.01 / 0.10	3	1,471
17.00	16.60 / 17.95	14	4,402	135	0.16	0.08 / 0.25	5	1,204
12.40	11.90 / 13.05	55	11,958	140	0.40	0.27 / 0.49	22	1,692
—	10.25 / 12.25	—	1	141	—	0.35 / 1.06	—	266
—	9.35 / 11.15	—	4	142	—	0.38 / 0.75	—	284
—	8.45 / 10.20	—	—	143	0.76	0.16 / 0.85	4	326
—	7.50 / 9.25	—	13	144	1.02	0.57 / 0.89	1	231
8.00	7.35 / 8.60	25	8,841	145	0.85	0.80 / 1.19	629	2,740
—	6.65 / 7.50	—	3	146	1.70	1.08 / 1.27	1	839
5.25	5.85 / 6.75	2	4	147	1.63	1.24 / 1.53	2	169
5.50	5.15 / 6.00	15	64	148	1.78	1.60 / 1.86	27	100
—	4.45 / 5.30	—	104	149	2.06	1.85 / 2.22	1	12
4.30	3.95 / 4.65	124	5,788	150	2.67	2.26 / 2.63	47	1,070
2.78	2.19 / 3.20	32	1,573	152.5	4.80	3.40 / 3.85	7	123
1.88	1.59 / 2.02	363	2,953	155	—	4.70 / 5.85	—	99
1.20	1.02 / 1.32	24	190	157.5	—	6.45 / 8.15	—	13
0.63	0.46 / 0.97	19	2,814	160	—	8.60 / 10.45	—	57
0.34	0.30 / 0.53	5	133	162.5	—	10.80 / 12.65	—	1
0.20	0.12 / 0.30	325	43,610	165	—	13.15 / 15.00	—	18
0.15	0.00 / 0.32	3	25	167.5	—	15.45 / 17.40	—	—
—	0.03 / 0.15	—	520	170	—	17.85 / 20.30	—	26
—	0.00 / 0.19	—	16	172.5	—	19.85 / 22.35	—	—
0.03	0.00 / 0.10	1	281	175	—	22.65 / 24.80	—	1
—	0.00 / 0.16	—	2	177.5	—	25.20 / 27.75	—	—
0.01	0.00 / 0.01	20	812	180	—	27.90 / 29.80	—	—
A dash means the contract did not trade — not a price of zero.

Sep 25, 202620 days

call OI 2,583 · put OI 1,346

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	35.50 / 39.40	—	6	115	—	0.00 / 1.16	—	26
—	34.55 / 38.45	—	6	116	—	0.00 / 1.15	—	4
—	33.80 / 37.45	—	7	117	—	0.00 / 1.35	—	2
—	32.95 / 35.45	—	1	118	—	0.00 / 1.01	—	9
—	32.15 / 35.45	—	—	119	—	0.00 / 1.28	—	2
—	30.55 / 34.45	—	1	120	—	0.01 / 0.43	—	52
—	29.70 / 33.45	—	—	121	—	0.00 / 1.22	—	7
—	28.70 / 32.45	—	2	122	—	0.00 / 1.15	—	16
—	27.55 / 31.50	—	2	123	—	0.00 / 1.01	—	6
—	26.55 / 30.50	—	—	124	—	0.00 / 1.55	—	5
—	25.60 / 29.50	—	—	125	—	0.00 / 1.05	—	27
—	24.60 / 28.50	—	2	126	—	0.00 / 1.01	—	7
—	23.75 / 27.50	—	2	127	—	0.00 / 1.19	—	14
—	22.60 / 26.50	—	3	128	—	0.00 / 1.01	—	16
—	22.00 / 25.50	—	2	129	—	0.00 / 1.01	—	5
—	21.20 / 24.50	—	7	130	—	0.00 / 0.50	—	17
—	20.00 / 23.55	—	1	131	—	0.00 / 0.64	—	7
—	18.80 / 22.50	—	1	132	—	0.00 / 0.96	—	5
—	17.70 / 20.35	—	5	133	—	0.00 / 1.15	—	306
—	17.05 / 19.05	—	17	134	—	0.01 / 0.75	—	3
—	15.70 / 18.35	—	34	135	0.41	0.17 / 0.73	11	44
—	15.10 / 17.30	—	9	136	0.51	0.16 / 0.88	2	4
—	13.75 / 16.50	—	2	137	—	0.05 / 0.97	—	4
—	13.25 / 15.85	—	20	138	—	0.29 / 1.10	—	74
—	12.30 / 14.20	—	19	139	—	0.01 / 1.59	—	4
—	11.55 / 13.45	—	525	140	1.00	0.41 / 1.15	30	224
—	10.50 / 12.30	—	104	141	—	0.56 / 1.20	—	4
—	10.00 / 11.50	—	6	142	0.96	0.71 / 1.35	3	55
—	8.75 / 10.60	—	—	143	1.55	0.26 / 1.35	2	20
—	8.15 / 9.80	—	10	144	1.82	0.87 / 1.75	2	16
—	7.80 / 9.15	—	374	145	1.79	1.10 / 1.85	10	251
—	7.10 / 8.45	—	2	146	—	1.43 / 2.13	—	2
5.80	6.40 / 7.80	4	81	147	—	1.49 / 2.52	—	14
6.39	5.45 / 6.80	1	4	148	—	1.96 / 3.05	—	13
4.65	5.20 / 6.05	2	6	149	—	2.28 / 3.40	—	12
4.85	4.65 / 5.20	5	122	150	3.92	2.83 / 3.70	1	41
—	3.30 / 4.20	—	50	152.5	—	3.45 / 5.10	—	—
2.55	2.05 / 2.87	21	55	155	—	5.40 / 6.10	—	2
1.79	1.53 / 2.11	4	178	157.5	—	6.85 / 8.30	—	4
1.18	0.93 / 1.39	111	391	160	—	9.00 / 10.15	—	1
0.91	0.55 / 1.27	30	22	162.5	—	11.15 / 13.05	—	—
—	0.30 / 1.08	—	335	165	—	13.10 / 14.95	—	—
—	0.02 / 0.91	—	55	167.5	—	15.70 / 17.65	—	—
0.36	0.07 / 0.73	12	88	170	—	17.65 / 20.00	—	21
—	0.00 / 0.96	—	10	172.5	—	20.30 / 22.45	—	—
0.03	0.00 / 0.23	2	6	175	—	22.95 / 25.25	—	—
—	0.00 / 0.78	—	2	177.5	—	25.05 / 27.70	—	—
—	0.00 / 0.96	—	3	180	—	27.30 / 30.20	—	—
—	0.00 / 2.15	—	3	185	—	32.50 / 35.20	—	—
—	0.00 / 2.14	—	2	190	—	37.05 / 39.80	—	—
A dash means the contract did not trade — not a price of zero.

Oct 02, 202627 days

call OI 655 · put OI 801

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	35.55 / 39.45	—	—	115	—	0.00 / 1.29	—	4
—	30.55 / 33.80	—	50	120	—	0.00 / 0.83	—	6
—	29.55 / 33.45	—	—	121	—	0.00 / 0.83	—	11
—	28.50 / 32.45	—	—	122	—	0.00 / 1.18	—	116
—	27.60 / 31.45	—	—	123	—	0.00 / 1.16	—	2
—	26.65 / 30.50	—	—	124	—	0.00 / 1.23	—	6
—	25.55 / 29.50	—	—	125	—	0.00 / 0.87	—	28
—	24.95 / 28.50	—	17	126	—	0.00 / 1.16	—	5
—	23.75 / 27.50	—	1	127	—	0.00 / 0.25	—	8
—	22.55 / 26.50	—	—	128	—	0.00 / 1.08	—	24
—	21.60 / 25.55	—	2	129	—	0.00 / 1.04	—	67
—	21.00 / 23.65	—	2	130	—	0.05 / 1.39	—	75
—	19.65 / 22.80	—	—	131	—	0.00 / 1.61	—	7
—	18.70 / 22.20	—	—	132	—	0.00 / 1.02	—	6
—	18.05 / 20.80	—	—	133	—	0.00 / 1.58	—	6
—	17.10 / 19.65	—	—	134	—	0.00 / 1.37	—	4
—	16.15 / 19.05	—	5	135	—	0.00 / 1.79	—	87
15.32	15.55 / 17.55	1	2	136	—	0.16 / 1.25	—	7
—	13.85 / 16.85	—	1	137	—	0.28 / 1.51	—	20
—	13.55 / 15.45	—	4	138	0.87	0.34 / 1.79	1	24
—	12.45 / 14.75	—	4	139	—	0.61 / 1.22	—	2
12.96	11.75 / 13.75	3	42	140	1.02	0.70 / 1.33	2	19
—	10.90 / 13.25	—	—	141	1.58	0.90 / 1.78	2	2
—	10.40 / 11.90	—	8	142	—	0.16 / 2.43	—	192
—	9.65 / 11.00	—	—	143	1.84	1.30 / 2.04	1	2
—	8.40 / 10.20	—	6	144	—	1.25 / 2.31	—	1
—	8.30 / 9.95	—	13	145	2.12	1.69 / 2.55	2	13
—	7.35 / 8.75	—	72	146	2.84	1.75 / 2.85	1	—
—	6.60 / 8.15	—	6	147	—	2.19 / 3.10	—	13
—	6.40 / 7.50	—	4	148	—	2.59 / 3.75	—	12
—	5.70 / 6.70	—	5	149	—	2.71 / 4.15	—	5
5.25	5.20 / 6.15	10	93	150	—	3.25 / 4.80	—	21
4.54	4.00 / 5.10	13	30	152.5	6.15	4.45 / 5.70	1	—
3.24	2.89 / 3.75	5	59	155	—	5.75 / 7.25	—	2
2.34	1.89 / 2.70	1	68	157.5	—	7.50 / 8.90	—	—
1.75	1.06 / 2.15	2	40	160	—	9.25 / 10.70	—	1
1.25	0.80 / 1.44	2	6	162.5	—	11.25 / 13.20	—	—
—	0.18 / 0.90	—	87	165	—	13.40 / 15.35	—	1
—	0.37 / 1.06	—	3	167.5	—	15.40 / 17.60	—	1
0.16	0.14 / 0.85	7	8	170	—	17.45 / 20.20	—	—
—	0.00 / 0.95	—	3	172.5	—	20.20 / 22.60	—	—
—	0.00 / 0.97	—	5	175	—	22.65 / 25.05	—	1
—	0.00 / 0.70	—	1	177.5	—	25.05 / 27.75	—	—
—	0.00 / 1.20	—	3	180	—	27.00 / 30.20	—	—
—	0.00 / 1.16	—	3	185	—	31.80 / 35.20	—	—
—	0.00 / 1.38	—	2	190	—	36.95 / 40.15	—	—
A dash means the contract did not trade — not a price of zero.

Oct 09, 202634 days

call OI 605 · put OI 42

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	20.65 / 23.45	—	1	130	—	0.00 / 1.24	—	—
—	16.40 / 18.95	—	7	135	—	0.00 / 1.36	—	9
—	15.50 / 17.85	—	—	136	1.64	0.26 / 2.02	1	—
—	13.80 / 16.00	—	1	138	—	0.67 / 1.92	—	7
—	12.90 / 15.15	—	—	139	1.61	0.75 / 1.70	2	4
—	12.10 / 13.85	—	1	140	1.65	1.00 / 1.82	8	1
—	11.55 / 13.40	—	—	141	1.60	1.14 / 1.90	12	1
—	10.45 / 12.30	—	2	142	2.24	1.34 / 2.35	9	4
—	9.70 / 11.50	—	1	143	2.63	1.62 / 2.53	7	—
—	9.50 / 11.65	—	3	144	2.89	1.91 / 3.05	4	—
—	8.85 / 10.45	—	4	145	3.01	2.05 / 3.20	6	1
—	7.85 / 9.40	—	—	146	2.96	1.68 / 3.50	3	1
—	7.55 / 8.65	—	78	147	—	2.73 / 3.95	—	3
7.04	6.55 / 8.20	10	6	148	—	3.10 / 4.25	—	6
—	6.45 / 7.40	—	4	149	4.80	2.77 / 4.70	1	3
—	5.85 / 6.80	—	5	150	4.45	3.95 / 5.10	1	2
4.85	4.60 / 5.55	5	1	152.5	—	4.35 / 6.30	—	—
—	3.45 / 4.35	—	421	155	—	6.45 / 7.65	—	—
2.83	2.54 / 3.55	3	41	157.5	—	8.15 / 9.25	—	—
2.09	1.98 / 2.84	10	7	160	—	9.60 / 11.30	—	—
1.71	1.23 / 2.11	10	—	162.5	—	10.85 / 13.05	—	—
1.25	0.85 / 1.77	614	2	165	—	13.65 / 15.70	—	—
1.19	0.61 / 1.83	3	—	167.5	—	15.85 / 17.75	—	—
—	0.45 / 1.65	—	1	170	—	18.15 / 20.40	—	—
—	0.00 / 2.09	—	1	172.5	—	20.15 / 22.75	—	—
—	0.00 / 1.10	—	16	175	—	22.65 / 25.15	—	—
—	0.00 / 2.23	—	1	177.5	—	25.15 / 27.80	—	—
—	0.00 / 1.67	—	1	180	—	27.45 / 30.10	—	—
A dash means the contract did not trade — not a price of zero.

Oct 16, 202641 days

call OI 26,927 · put OI 12,383

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	35.95 / 38.30	—	653	115	0.10	0.03 / 0.07	1	2,183
—	31.00 / 33.10	—	452	120	0.14	0.06 / 0.14	4	994
—	26.10 / 28.80	—	1,722	125	0.28	0.11 / 0.25	10	1,571
21.85	21.85 / 23.20	5	3,548	130	0.46	0.38 / 0.53	11	1,782
17.97	17.50 / 18.40	6	2,053	135	0.88	0.80 / 0.97	57	1,071
13.58	13.00 / 14.15	14	1,757	140	1.63	1.55 / 1.70	241	1,179
9.77	9.40 / 10.35	24	1,817	145	2.89	2.76 / 3.00	39	1,469
7.00	6.60 / 7.20	185	3,929	150	5.05	4.60 / 4.80	244	1,724
4.55	4.40 / 4.60	2,809	1,553	155	8.00	7.00 / 7.55	4	247
2.77	2.65 / 2.85	65	1,725	160	—	10.20 / 11.35	—	89
1.61	1.45 / 1.66	96	3,466	165	—	13.90 / 15.45	—	15
0.86	0.65 / 1.01	52	1,034	170	19.79	18.45 / 20.00	2	5
0.47	0.38 / 0.53	4	1,474	175	—	23.15 / 25.10	—	—
0.28	0.21 / 0.28	81	1,707	180	—	27.95 / 29.90	—	54
0.20	0.08 / 0.18	44	13	185	—	32.55 / 34.60	—	—
0.16	0.06 / 0.14	2	24	190	—	37.15 / 39.55	—	—
A dash means the contract did not trade — not a price of zero.

How to read this chain

Calls sit on the left, puts on the right, and every row is one strike. The highlighted row is the strike closest to spot. Open interest is the number of contracts still outstanding at that strike — positions that exist right now. Volume is how many traded on the session shown. Open interest builds slowly and marks where positioning has accumulated; volume spikes and marks where attention went today.

Strikes with no open interest and no trades on either side are omitted, and the ladder is trimmed to within 25% of spot — the far wings are almost entirely empty and say nothing about positioning.

More on MRK

MRK options score MRK gamma walls MRK max pain MRK IV rank MRK put/call ratio MRK options flow

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Educational, not investment advice. Options involve risk. Open interest is reported with a one-session lag by OCC, so these levels describe positioning as of the last settled session, not live intraday flow.