MSFT Options Open Interest by Strike, Oct 21 Settlement

MSFT 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.

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 21 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, 3,266 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 423 to 634. Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.

MSFT: largest changes in the full book, settled 2026-10-21 vs 2026-10-20

Strike	Expiry	Type	Prior OI	Settled OI	Change
600	10/30	call	18,612	7,674	-10,938
575	10/30	call	15,862	5,442	-10,420
590	10/30	call	3,640	10,759	+7,119
600	12/18	call	30,309	32,369	+2,060
555	10/30	call	16,616	18,598	+1,982
510	12/18	call	2,939	4,921	+1,982
510	11/20	call	5,927	7,883	+1,956
490	10/23	put	1,711	3,390	+1,679
535	10/23	call	5,749	7,264	+1,515
540	10/23	call	4,192	5,632	+1,440
542.5	10/23	call	2,033	3,470	+1,437
495	12/18	put	3,192	4,629	+1,437
550	10/30	call	4,396	5,797	+1,401
530	10/23	put	3,959	5,110	+1,151
530	11/02	put	1,049	2,073	+1,024

Expiration 2026-10-23

MSFT open interest, settled 2026-10-21, expiration 2026-10-23, strikes 480 to 577.5

Strike	Expiry	Type	Prior OI	Settled OI	Change
480	10/23	call	282	279	-3
480	10/23	put	520	514	-6
482.5	10/23	call	13	14	+1
482.5	10/23	put	101	171	+70
485	10/23	call	89	91	+2
485	10/23	put	1,266	1,314	+48
487.5	10/23	call	89	90	+1
487.5	10/23	put	163	167	+4
490	10/23	call	353	350	-3
490	10/23	put	1,711	3,390	+1,679
492.5	10/23	call	110	110	0
492.5	10/23	put	419	1,287	+868
495	10/23	call	225	224	-1
495	10/23	put	1,701	2,521	+820
497.5	10/23	call	48	48	0
497.5	10/23	put	604	613	+9
500	10/23	call	570	555	-15
500	10/23	put	3,304	3,248	-56
502.5	10/23	call	108	107	-1
502.5	10/23	put	701	610	-91
505	10/23	call	388	381	-7
505	10/23	put	1,683	2,105	+422
507.5	10/23	call	109	108	-1
507.5	10/23	put	957	979	+22
510	10/23	call	609	609	0
510	10/23	put	2,308	2,248	-60
512.5	10/23	call	18	29	+11
512.5	10/23	put	2,132	2,566	+434
515	10/23	call	390	335	-55
515	10/23	put	2,843	3,820	+977
517.5	10/23	call	64	69	+5
517.5	10/23	put	1,060	1,138	+78
520	10/23	call	610	618	+8
520	10/23	put	2,605	2,644	+39
522.5	10/23	call	250	261	+11
522.5	10/23	put	2,766	3,549	+783
525	10/23	call	1,148	1,143	-5
525	10/23	put	4,396	4,464	+68
527.5	10/23	call	651	704	+53
527.5	10/23	put	1,251	1,802	+551
530	10/23	call	4,477	4,410	-67
530	10/23	put	3,959	5,110	+1,151
532.5	10/23	call	1,213	1,620	+407
532.5	10/23	put	1,177	1,219	+42
535	10/23	call	5,749	7,264	+1,515
535	10/23	put	1,555	1,681	+126
537.5	10/23	call	2,328	3,118	+790
537.5	10/23	put	510	529	+19
540	10/23	call	4,192	5,632	+1,440
540	10/23	put	5,489	5,478	-11
542.5	10/23	call	2,033	3,470	+1,437
542.5	10/23	put	175	183	+8
545	10/23	call	4,460	5,070	+610
545	10/23	put	620	616	-4
547.5	10/23	call	1,308	1,852	+544
547.5	10/23	put	78	78	0
550	10/23	call	7,890	8,773	+883
550	10/23	put	876	870	-6
552.5	10/23	call	1,173	1,350	+177
552.5	10/23	put	28	28	0
555	10/23	call	2,957	3,024	+67
555	10/23	put	2,165	2,163	-2
557.5	10/23	call	1,962	2,026	+64
560	10/23	call	7,857	7,723	-134
560	10/23	put	1	1	0
562.5	10/23	call	635	640	+5
565	10/23	call	7,728	7,728	0
567.5	10/23	call	186	182	-4
570	10/23	call	17,997	17,993	-4
570	10/23	put	2	2	0
572.5	10/23	call	211	225	+14
575	10/23	call	8,189	8,163	-26
577.5	10/23	call	58	61	+3

Expiration 2026-10-26

MSFT open interest, settled 2026-10-21, expiration 2026-10-26, strikes 480 to 577.5

Strike	Expiry	Type	Prior OI	Settled OI	Change
480	10/26	call	10	8	-2
480	10/26	put	5	5	0
482.5	10/26	put	0	11	+11
485	10/26	call	205	301	+96
485	10/26	put	202	202	0
487.5	10/26	call	0	2	+2
487.5	10/26	put	0	2	+2
490	10/26	call	8	8	0
490	10/26	put	91	90	-1
492.5	10/26	call	48	48	0
492.5	10/26	put	16	26	+10
495	10/26	call	3	3	0
495	10/26	put	60	131	+71
497.5	10/26	call	2	2	0
497.5	10/26	put	13	15	+2
500	10/26	call	29	31	+2
500	10/26	put	281	286	+5
502.5	10/26	call	9	9	0
502.5	10/26	put	52	288	+236
505	10/26	call	13	13	0
505	10/26	put	212	246	+34
507.5	10/26	call	13	13	0
507.5	10/26	put	159	352	+193
510	10/26	call	38	38	0
510	10/26	put	607	697	+90
512.5	10/26	call	10	11	+1
512.5	10/26	put	135	202	+67
515	10/26	call	25	38	+13
515	10/26	put	142	134	-8
517.5	10/26	call	247	247	0
517.5	10/26	put	56	95	+39
520	10/26	call	272	282	+10
520	10/26	put	277	338	+61
522.5	10/26	call	39	43	+4
522.5	10/26	put	70	90	+20
525	10/26	call	123	128	+5
525	10/26	put	376	468	+92
527.5	10/26	call	113	137	+24
527.5	10/26	put	143	334	+191
530	10/26	call	91	113	+22
530	10/26	put	539	456	-83
532.5	10/26	call	203	302	+99
532.5	10/26	put	88	139	+51
535	10/26	call	441	578	+137
535	10/26	put	245	249	+4
537.5	10/26	call	705	731	+26
537.5	10/26	put	58	56	-2
540	10/26	call	741	995	+254
540	10/26	put	137	139	+2
542.5	10/26	call	109	155	+46
542.5	10/26	put	25	27	+2
545	10/26	call	1,701	1,695	-6
545	10/26	put	31	31	0
547.5	10/26	call	181	366	+185
547.5	10/26	put	19	38	+19
550	10/26	call	437	964	+527
550	10/26	put	27	27	0
552.5	10/26	call	108	209	+101
552.5	10/26	put	1	1	0
555	10/26	call	1,718	1,785	+67
555	10/26	put	5	5	0
557.5	10/26	call	75	67	-8
557.5	10/26	put	21	21	0
560	10/26	call	390	376	-14
560	10/26	put	10	0	-10
562.5	10/26	call	22	263	+241
565	10/26	call	228	603	+375
567.5	10/26	call	5	5	0
570	10/26	call	99	86	-13
572.5	10/26	call	28	29	+1
575	10/26	call	97	107	+10
577.5	10/26	call	0	1	+1

Expiration 2026-10-30

MSFT open interest, settled 2026-10-21, expiration 2026-10-30, strikes 480 to 577.5

Strike	Expiry	Type	Prior OI	Settled OI	Change
480	10/30	call	1,454	1,454	0
480	10/30	put	1,375	1,397	+22
482.5	10/30	put	1	20	+19
485	10/30	call	92	92	0
485	10/30	put	1,402	1,420	+18
487.5	10/30	call	0	15	+15
487.5	10/30	put	0	5	+5
490	10/30	call	177	177	0
490	10/30	put	1,098	1,113	+15
492.5	10/30	call	1	2	+1
492.5	10/30	put	3	32	+29
495	10/30	call	200	190	-10
495	10/30	put	1,656	1,675	+19
497.5	10/30	call	1	2	+1
497.5	10/30	put	1	33	+32
500	10/30	call	1,110	1,121	+11
500	10/30	put	3,442	3,492	+50
502.5	10/30	put	13	52	+39
505	10/30	call	368	377	+9
505	10/30	put	566	601	+35
507.5	10/30	put	12	46	+34
510	10/30	call	425	424	-1
510	10/30	put	1,009	1,079	+70
512.5	10/30	call	35	43	+8
512.5	10/30	put	161	167	+6
515	10/30	call	924	925	+1
515	10/30	put	798	834	+36
517.5	10/30	call	95	96	+1
517.5	10/30	put	157	190	+33
520	10/30	call	2,228	2,226	-2
520	10/30	put	1,342	1,393	+51
522.5	10/30	call	94	98	+4
522.5	10/30	put	229	237	+8
525	10/30	call	15,872	15,944	+72
525	10/30	put	1,390	1,413	+23
527.5	10/30	call	182	196	+14
527.5	10/30	put	485	488	+3
530	10/30	call	4,969	5,827	+858
530	10/30	put	2,392	3,386	+994
532.5	10/30	call	185	222	+37
532.5	10/30	put	582	606	+24
535	10/30	call	1,170	1,191	+21
535	10/30	put	776	726	-50
537.5	10/30	call	136	328	+192
537.5	10/30	put	394	394	0
540	10/30	call	3,932	4,093	+161
540	10/30	put	1,377	1,366	-11
542.5	10/30	call	302	319	+17
542.5	10/30	put	103	100	-3
545	10/30	call	1,716	1,704	-12
545	10/30	put	528	529	+1
547.5	10/30	call	14	26	+12
547.5	10/30	put	0	2	+2
550	10/30	call	4,396	5,797	+1,401
550	10/30	put	189	190	+1
552.5	10/30	call	72	134	+62
555	10/30	call	16,616	18,598	+1,982
555	10/30	put	1,127	1,132	+5
557.5	10/30	call	62	117	+55
560	10/30	call	1,567	1,623	+56
560	10/30	put	445	445	0
562.5	10/30	call	6	24	+18
565	10/30	call	1,173	1,201	+28
565	10/30	put	27	27	0
567.5	10/30	call	16	64	+48
570	10/30	call	4,506	4,525	+19
570	10/30	put	26	26	0
572.5	10/30	call	240	243	+3
575	10/30	call	15,862	5,442	-10,420
575	10/30	put	29	30	+1
577.5	10/30	call	50	62	+12

Expiration 2026-11-02

MSFT open interest, settled 2026-10-21, expiration 2026-11-02, strikes 475 to 582.5

Strike	Expiry	Type	Prior OI	Settled OI	Change
475	11/02	call	1	3	+2
475	11/02	put	251	297	+46
477.5	11/02	call	1	1	0
477.5	11/02	put	0	5	+5
480	11/02	call	2	2	0
480	11/02	put	331	332	+1
485	11/02	put	237	238	+1
490	11/02	call	2	2	0
490	11/02	put	158	159	+1
492.5	11/02	put	2	2	0
495	11/02	call	1	1	0
495	11/02	put	94	95	+1
497.5	11/02	call	1	2	+1
497.5	11/02	put	0	22	+22
500	11/02	put	189	195	+6
502.5	11/02	put	10	10	0
505	11/02	call	2	2	0
505	11/02	put	174	175	+1
507.5	11/02	put	10	16	+6
510	11/02	put	13	15	+2
512.5	11/02	put	10	12	+2
515	11/02	call	3	3	0
515	11/02	put	53	54	+1
517.5	11/02	call	1	1	0
520	11/02	call	20	20	0
520	11/02	put	6	22	+16
522.5	11/02	call	0	2	+2
525	11/02	call	11	12	+1
525	11/02	put	2	2	0
527.5	11/02	call	1	1	0
527.5	11/02	put	0	6	+6
530	11/02	call	1,054	2,057	+1,003
530	11/02	put	1,049	2,073	+1,024
532.5	11/02	call	4	20	+16
532.5	11/02	put	1	8	+7
535	11/02	call	122	122	0
535	11/02	put	6	6	0
537.5	11/02	call	0	1	+1
540	11/02	call	124	130	+6
540	11/02	put	150	150	0
542.5	11/02	call	0	1	+1
545	11/02	call	132	138	+6
545	11/02	put	0	1	+1
547.5	11/02	call	1	1	0
550	11/02	call	22	24	+2
552.5	11/02	call	0	2	+2
555	11/02	call	167	171	+4
557.5	11/02	put	0	1	+1
560	11/02	call	42	47	+5
565	11/02	call	237	237	0
570	11/02	call	23	28	+5
572.5	11/02	call	1	2	+1
575	11/02	call	112	112	0
575	11/02	put	0	1	+1
577.5	11/02	call	1	3	+2
580	11/02	call	6	10	+4
582.5	11/02	call	3	5	+2

Expiration 2026-11-04

MSFT open interest, settled 2026-10-21, expiration 2026-11-04, strikes 440 to 595

Strike	Expiry	Type	Prior OI	Settled OI	Change
440	11/04	call	0	1	+1
440	11/04	put	0	1	+1
445	11/04	call	0	1	+1
450	11/04	call	0	7	+7
455	11/04	call	0	7	+7
460	11/04	call	0	7	+7
465	11/04	call	1	15	+14
470	11/04	call	0	1	+1
475	11/04	call	0	1	+1
475	11/04	put	1	2	+1
480	11/04	put	0	2	+2
485	11/04	put	1	12	+11
490	11/04	call	0	1	+1
490	11/04	put	0	3	+3
495	11/04	put	2	2	0
497.5	11/04	put	0	1	+1
500	11/04	call	0	1	+1
500	11/04	put	2	2	0
502.5	11/04	call	0	1	+1
505	11/04	call	1	13	+12
505	11/04	put	0	2	+2
507.5	11/04	call	0	4	+4
510	11/04	put	1	3	+2
515	11/04	call	3	3	0
515	11/04	put	1	1	0
517.5	11/04	call	0	5	+5
520	11/04	put	7	6	-1
525	11/04	call	1	1	0
525	11/04	put	5	4	-1
530	11/04	call	2	8	+6
530	11/04	put	6	7	+1
532.5	11/04	call	0	12	+12
532.5	11/04	put	0	8	+8
535	11/04	call	0	4	+4
537.5	11/04	call	0	1	+1
540	11/04	call	1	11	+10
540	11/04	put	0	9	+9
542.5	11/04	call	0	3	+3
545	11/04	call	4	76	+72
550	11/04	call	1	6	+5
552.5	11/04	call	0	40	+40
555	11/04	call	0	12	+12
560	11/04	call	0	2	+2
565	11/04	call	0	11	+11
567.5	11/04	put	0	1	+1
575	11/04	call	1	12	+11
580	11/04	call	2	3	+1
580	11/04	put	0	3	+3
585	11/04	call	1	4	+3
590	11/04	call	3	4	+1
595	11/04	call	3	3	0

Expiration 2026-11-06

MSFT open interest, settled 2026-10-21, expiration 2026-11-06, strikes 455 to 600

Strike	Expiry	Type	Prior OI	Settled OI	Change
455	11/06	call	21	26	+5
455	11/06	put	256	280	+24
460	11/06	call	260	274	+14
460	11/06	put	568	575	+7
465	11/06	call	29	19	-10
465	11/06	put	700	701	+1
470	11/06	call	68	70	+2
470	11/06	put	309	357	+48
475	11/06	call	144	144	0
475	11/06	put	288	278	-10
480	11/06	call	67	82	+15
480	11/06	put	336	362	+26
485	11/06	call	111	110	-1
485	11/06	put	2,459	2,459	0
490	11/06	call	126	126	0
490	11/06	put	330	350	+20
495	11/06	call	139	140	+1
495	11/06	put	2,287	2,292	+5
500	11/06	call	61	62	+1
500	11/06	put	756	749	-7
505	11/06	call	63	63	0
505	11/06	put	249	250	+1
507.5	11/06	put	32	32	0
510	11/06	call	61	63	+2
510	11/06	put	764	770	+6
512.5	11/06	call	2	2	0
512.5	11/06	put	0	6	+6
515	11/06	call	156	158	+2
515	11/06	put	461	461	0
517.5	11/06	call	19	20	+1
517.5	11/06	put	0	4	+4
520	11/06	call	245	265	+20
520	11/06	put	396	396	0
522.5	11/06	call	1	2	+1
522.5	11/06	put	9	11	+2
525	11/06	call	483	572	+89
525	11/06	put	469	477	+8
527.5	11/06	call	4	11	+7
527.5	11/06	put	18	33	+15
530	11/06	call	725	749	+24
530	11/06	put	916	825	-91
532.5	11/06	call	59	117	+58
532.5	11/06	put	10	23	+13
535	11/06	call	613	616	+3
535	11/06	put	507	487	-20
537.5	11/06	call	27	29	+2
537.5	11/06	put	3	3	0
540	11/06	call	371	478	+107
540	11/06	put	584	584	0
542.5	11/06	call	23	43	+20
542.5	11/06	put	0	3	+3
545	11/06	call	1,603	1,604	+1
545	11/06	put	90	104	+14
547.5	11/06	call	28	30	+2
547.5	11/06	put	0	5	+5
550	11/06	call	2,330	2,297	-33
550	11/06	put	331	331	0
552.5	11/06	call	25	29	+4
552.5	11/06	put	0	5	+5
555	11/06	call	398	400	+2
555	11/06	put	67	67	0
560	11/06	call	656	656	0
560	11/06	put	192	192	0
565	11/06	call	477	485	+8
565	11/06	put	17	17	0
570	11/06	call	680	687	+7
570	11/06	put	69	69	0
575	11/06	call	870	881	+11
575	11/06	put	39	39	0
580	11/06	call	669	680	+11
580	11/06	put	3	4	+1
585	11/06	call	213	212	-1
585	11/06	put	10	10	0
590	11/06	call	209	209	0
595	11/06	call	191	233	+42
595	11/06	put	1	1	0
600	11/06	call	749	774	+25
600	11/06	put	1	1	0

Later expirations (2026-11-13, 2026-11-20, 2026-11-27, 2026-12-18, 2027-01-15, 2027-02-19, 2027-03-19, 2027-04-16, 2027-06-17, 2027-09-17, 2027-12-17, 2028-01-21, 2028-06-16, 2028-12-15, 2029-01-19) and all other strikes are in the Markdown table.

Markdown table | Open interest changes across symbols

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