ALGN Options Open Interest by Strike, Oct 21 Settlement

ALGN open interest settled 2026-10-21 vs 2026-10-20.

Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.

Computed from the Oct 21 settlement. Next update after the Oct 22 settlement, after 5:30 a.m. PT (8:30 a.m. ET) on Friday, Oct 23, 2026.

The two archived books match. A zero archived difference is not proof that no contracts opened or closed; a repeated capture can also produce matching books.

All archived unexpired expiration/strike/type keys, including unchanged counts. Series sharing that key are combined; roots and deliverables are not retained. Zero-OI keys omitted by the archive are not reconstructed.

This page shows the 6 nearest of 14 expirations, with the 40 strikes nearest the archived reference price (2026-10-21) for each, plus the largest changes across the whole book. The complete book, 542 expiration/strike/type keys, is in the Markdown table.

Strike bucket on the horizontal axis, settled open contracts per bucket on the vertical axis. Calls in the accent color; puts in orange. Totals across the 6 nearest expirations, strikes from 121 to 182. Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.

Expiration 2026-10-23

ALGN open interest, settled 2026-10-21, expiration 2026-10-23, strikes 90 to 215

Strike	Expiry	Type	Prior OI	Settled OI
90	10/23	put	180	180
95	10/23	put	78	78
100	10/23	put	23	23
115	10/23	call	1	1
115	10/23	put	1	1
116	10/23	call	1	1
120	10/23	put	12	12
125	10/23	put	3	3
128	10/23	put	12	12
129	10/23	put	83	83
130	10/23	put	295	295
131	10/23	put	23	23
132	10/23	put	20	20
135	10/23	put	9	9
137	10/23	put	1	1
139	10/23	put	9	9
140	10/23	call	7	7
140	10/23	put	30	30
141	10/23	put	14	14
142	10/23	put	6	6
143	10/23	put	12	12
144	10/23	put	6	6
145	10/23	call	15	15
145	10/23	put	20	20
146	10/23	put	2	2
147	10/23	call	19	19
147	10/23	put	71	71
148	10/23	call	3	3
148	10/23	put	8	8
149	10/23	call	2	2
149	10/23	put	1	1
150	10/23	call	97	97
150	10/23	put	8	8
152.5	10/23	call	55	55
152.5	10/23	put	11	11
155	10/23	call	112	112
157.5	10/23	call	2	2
160	10/23	call	14	14
160	10/23	put	2	2
162.5	10/23	call	6	6
165	10/23	call	5	5
167.5	10/23	call	45	45
170	10/23	call	5	5
175	10/23	put	1	1
180	10/23	call	1	1
185	10/23	call	1	1
190	10/23	call	1	1
210	10/23	call	8	8
215	10/23	call	1	1

Expiration 2026-10-30

ALGN open interest, settled 2026-10-21, expiration 2026-10-30, strikes 115 to 185

Strike	Expiry	Type	Prior OI	Settled OI
115	10/30	put	16	16
120	10/30	put	182	182
125	10/30	put	19	19
126	10/30	put	7	7
127	10/30	put	3	3
128	10/30	put	7	7
129	10/30	put	8	8
130	10/30	put	20	20
131	10/30	put	1	1
132	10/30	put	7	7
133	10/30	put	3	3
134	10/30	put	3	3
135	10/30	put	75	75
136	10/30	call	1	1
136	10/30	put	5	5
137	10/30	put	1	1
138	10/30	put	25	25
139	10/30	put	2	2
140	10/30	call	12	12
140	10/30	put	117	117
141	10/30	put	2	2
142	10/30	put	2	2
143	10/30	call	3	3
143	10/30	put	3	3
144	10/30	call	4	4
144	10/30	put	66	66
145	10/30	call	93	93
145	10/30	put	152	152
146	10/30	call	5	5
146	10/30	put	22	22
147	10/30	call	4	4
147	10/30	put	9	9
148	10/30	call	102	102
148	10/30	put	3	3
149	10/30	call	4	4
149	10/30	put	1	1
150	10/30	call	20	20
150	10/30	put	7	7
152.5	10/30	call	5	5
152.5	10/30	put	1	1
155	10/30	call	26	26
155	10/30	put	10	10
157.5	10/30	call	19	19
160	10/30	call	37	37
160	10/30	put	8	8
162.5	10/30	call	6	6
165	10/30	call	23	23
167.5	10/30	call	6	6
170	10/30	call	30	30
172.5	10/30	call	1	1
175	10/30	call	5	5
180	10/30	call	1	1
185	10/30	call	70	70

Expiration 2026-11-06

ALGN open interest, settled 2026-10-21, expiration 2026-11-06, strikes 90 to 185

Strike	Expiry	Type	Prior OI	Settled OI
90	11/06	put	1	1
95	11/06	put	101	101
100	11/06	put	51	51
105	11/06	put	252	252
115	11/06	put	3	3
120	11/06	put	39	39
125	11/06	put	21	21
127	11/06	put	2	2
130	11/06	put	4	4
134	11/06	call	1	1
134	11/06	put	1	1
135	11/06	put	6	6
140	11/06	call	16	16
140	11/06	put	6	6
145	11/06	call	10	10
145	11/06	put	145	145
148	11/06	put	4	4
150	11/06	call	4	4
155	11/06	call	7	7
155	11/06	put	1	1
160	11/06	call	9	9
160	11/06	put	1	1
165	11/06	call	7	7
170	11/06	call	5	5
175	11/06	put	1	1
185	11/06	call	2	2

Expiration 2026-11-13

ALGN open interest, settled 2026-10-21, expiration 2026-11-13, strikes 95 to 215

Strike	Expiry	Type	Prior OI	Settled OI
95	11/13	put	100	100
100	11/13	put	50	50
105	11/13	put	251	251
115	11/13	put	6	6
120	11/13	put	15	15
130	11/13	put	1	1
134	11/13	call	2	2
134	11/13	put	2	2
136	11/13	call	2	2
136	11/13	put	2	2
138	11/13	put	2	2
140	11/13	call	2	2
140	11/13	put	107	107
142	11/13	put	1	1
143	11/13	put	1	1
145	11/13	call	1	1
145	11/13	put	1	1
146	11/13	call	1	1
150	11/13	call	3	3
155	11/13	call	15	15
155	11/13	put	5	5
160	11/13	call	11	11
165	11/13	call	1	1
170	11/13	call	21	21
175	11/13	call	1	1
205	11/13	call	1	1
215	11/13	call	1	1

Expiration 2026-11-20

ALGN open interest, settled 2026-10-21, expiration 2026-11-20, strikes 80 to 220

Strike	Expiry	Type	Prior OI	Settled OI
80	11/20	put	2	2
85	11/20	put	4	4
90	11/20	put	50	50
95	11/20	put	40	40
100	11/20	put	6	6
105	11/20	put	10	10
110	11/20	put	50	50
115	11/20	put	87	87
120	11/20	put	15	15
125	11/20	put	42	42
130	11/20	put	36	36
135	11/20	put	44	44
140	11/20	call	7	7
140	11/20	put	1,109	1,109
145	11/20	call	28	28
145	11/20	put	39	39
146	11/20	put	1	1
150	11/20	call	77	77
150	11/20	put	10	10
152.5	11/20	put	47	47
155	11/20	call	358	358
155	11/20	put	3	3
160	11/20	call	25	25
160	11/20	put	14	14
165	11/20	call	26	26
165	11/20	put	2	2
170	11/20	call	20	20
172.5	11/20	call	2	2
175	11/20	call	17	17
180	11/20	call	35	35
185	11/20	call	16	16
190	11/20	call	153	153
195	11/20	call	6	6
200	11/20	call	2	2
210	11/20	call	1	1
220	11/20	call	1	1

Expiration 2026-11-27

ALGN open interest, settled 2026-10-21, expiration 2026-11-27, strikes 80 to 170

Strike	Expiry	Type	Prior OI	Settled OI
80	11/27	put	250	250
85	11/27	put	1	1
90	11/27	put	50	50
95	11/27	put	34	34
125	11/27	put	15	15
130	11/27	put	1	1
140	11/27	put	28	28
165	11/27	call	3	3
170	11/27	call	1	1

Later expirations (2026-12-18, 2027-01-15, 2027-03-19, 2027-04-16, 2027-06-17, 2027-09-17, 2028-01-21, 2029-01-19) and all other strikes are in the Markdown table.

Markdown table | Open interest changes across symbols

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