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OI update signal: Not checked today MSFT / AAPL · Checked Oct 23, 09:56 EDT
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View affected symbolsAADX,AAMI,AAP,ABAT,ABCB,ABEO,ABG,ABM,ABOS,ABSI,ABTC,ABUS,ABVC,ACB,ACET,ACH,ACHC,ACLS,ACMR,ACNB,ACOG,ACRS,ACTG,ADIG,ADTN,ADUR,ADUS,AER,AESI,AEXA,AFCG,AGEN,AGI,AGIO,AGL,AGNT,AGYS,AHRT,AIFC,AIFU,AIP,AIRJ,AIRO,AIRS,AKBA,ALC,ALDX,ALEC,ALGT,ALH,ALKS,ALKT,ALLO,ALLT,ALMS,ALNY,ALT,ALTI,ALTO,AMAL,AMBA,AMBQ,AMCX,AMPG,AMPL,AMPY,AMR,AMRC,AMRZ,AMTM,AMTX,ANAB,ANGI,ANGO,ANGX,ANIK,ANIP,ANIX,ANNX,ANRO,ANVS,AOSL,APEI,APLE,APOG,ARAY,ARCO,ARDT,ARDX,AREC,ARIS,ARLO,AROC,AROW,ARQ,ARTV,ARX,ARXS,ASAN,ASC,ASLE,ASMB,ASO,ASPN,ASTE,ASTH,ASTI,ASTL,ASUR,ASYS,ATEC,ATEN,ATLO,ATNI,ATRC,ATRO,AU,AUDC,AUGO,AUPH,AVAH,AVBC,AVPT,AVR,AWI,AWR,AWRE,AXGN,AXSM,AYA,AZ,BANC,BAND,BANF,BBD,BBVA,BCPC,BCSF,BKKT,BLZE,BMI,BMO,BMRC,BNS,BSBR,BUSE,CENN,COLD,CUE,DDD,DOX,DRTS,EZPW,FAC,FATE,FBIO,FBNC,FCBC,FDMT,FDXF,FELE,FER,FERG,FFBC,FHTX,FIRY,FISI,FLD,FLL,FLNA,FLNG,FLOC,FLUT,FLWS,FLY,FMAO,FMBH,FMNB,FNLC,FORM,FORR,FOSL,FPH,FRHC,FSBC,FSTR,FSUN,FSV,FTRE,FWDI,FWRG,GDYN,GFI,GH,GLBS,GLOO,GPI,GPRE,GRBK,GRDN,GSBC,GSIT,GTN,HAFN,HAPN,HASI,HAWK,HBM,HBNC,HBT,HCSG,HDB,HDSN,HE,HEI,HELP,HESM,HHH,HITI,HLF,HMY,HNGE,HNRG,HNST,HONA,HOS,HPK,HPP,HRI,HROW,HRZN,HSBC,HTFL,HTGC,HTT,HUBG,HUCK,HUMA,HUN,HY,IA,IART,ICHR,ICL,ICLR,IDYA,IESC,IGIC,IIPR,IMMX,IMNM,IMPP,IMTX,IMUX,IMVT,IMXI,INBK,INBX,ING,INGN,INIO,INMB,INMD,INOD,INR,INSE,INSM,INSP,INV,INVE,INVX,IOND,IONS,IPWR,IRLA,IRMD,IRTC,IRWD,IVR,IVVD,LFWD,MT,NTLA,PI,RAIL,RCEL,RCUS,SBC,SEV,SPRY,SRCE,THFF,TKNO,TRAX,TXG

ZTS

Daily option chain

Daily open interest

vs Oct 21, 2026

Saved stock price: $80.75 · Expirations before Oct 23, 2026 hidden automatically.

ITM In the money Unshaded: out of the money ATM Strike equals stock price Based on the saved stock price
444 contracts / 9 expirationsClick OI for history
Nov 20, 2026EXPIRATION30 contracts / 15 strikes
SAVED STOCK PRICE$80.75Nearest ATM strike $80.00
Jump to ATM
ZTS option chain expiring 2026-11-20, open interest on 2026-10-23 compared with 2026-10-21
CallsStrikePuts
Prev OIOpen interestChangeIVPrev OIOpen interestChangeIV
2 2In the money 0 0.00% 40.00 0 0 0New 120.98%
0 0In the money 0New 118.25% 45.00 0 0 0New 156.70%
0 0In the money 0New 98.81% 50.00 1,225 1,225 0 75.36%
2 2In the money 0 84.73% 55.00 755 754 -1 56.57%
6 6In the money 0 67.96% 60.00 1,014 1,011 -3 56.49%
96 95In the money -1 69.33% 65.00 2,817 2,859 +42 52.48%
781 765In the money -16 54.24% 70.00 1,673 1,703 +30 50.64%
1,536 1,516In the money -20 49.10% 75.00 729 790 +61 48.32%
2,541 2,652In the money +111 47.70% 80.00NEAREST ATM 320 371 +51 48.13%
STOCK PRICE $80.75
2,176 2,360 +184 46.82% 85.00 28 37In the money +9 47.67%
1,018 1,671 +653 46.85% 90.00 3 4In the money +1 48.56%
277 333 +56 47.19% 95.00 0 0In the money 0New 31.14%
70 134 +64 49.23% 100.00 0 0In the money 0New 0.00%
2 4 +2 56.62% 105.00 3 3In the money 0 0.00%
12 12 0 56.14% 110.00 3 3In the money 0 0.00%
Dec 18, 2026EXPIRATION70 contracts / 35 strikes
SAVED STOCK PRICE$80.75Nearest ATM strike $80.00
Jump to ATM
ZTS option chain expiring 2026-12-18, open interest on 2026-10-23 compared with 2026-10-21
CallsStrikePuts
Prev OIOpen interestChangeIVPrev OIOpen interestChangeIV
4 4In the money 0 97.22% 40.00 5 5 0 130.08%
4 4In the money 0 77.35% 45.00 1,056 1,056 0 83.18%
18 17In the money -1 66.45% 50.00 156 157 +1 68.83%
4 4In the money 0 53.21% 55.00 592 592 0 48.73%
35 35In the money 0 57.96% 60.00 2,322 2,304 -18 44.03%
38 38In the money 0 51.97% 65.00 2,040 1,839 -201 44.44%
143 140In the money -3 43.76% 70.00 1,653 1,569 -84 42.19%
1,527 1,538In the money +11 42.62% 75.00 954 945 -9 41.63%
681 694In the money +13 41.66% 80.00NEAREST ATM 370 368 -2 41.66%
STOCK PRICE $80.75
650 960 +310 40.85% 85.00 350 348In the money -2 44.02%
973 1,032 +59 40.64% 90.00 64 64In the money 0 44.46%
347 371 +24 41.27% 95.00 43 43In the money 0 37.42%
779 786 +7 45.90% 100.00 189 187In the money -2 0.00%
242 242 0 42.20% 105.00 24 24In the money 0 0.00%
126 126 0 48.50% 110.00 0 0In the money 0New 0.00%
186 186 0 45.20% 115.00 0 0In the money 0New 0.00%
240 240 0 46.74% 120.00 0 0In the money 0New 0.00%
76 76 0 65.52% 125.00 0 0In the money 0New 0.00%
74 74 0 46.22% 130.00 0 0In the money 0New 0.00%
19 19 0 74.25% 135.00 0 0In the money 0New 0.00%
40 40 0 78.29% 140.00 0 0In the money 0New 0.00%
70 70 0 82.13% 145.00 0 0In the money 0New 0.00%
87 87 0 81.46% 150.00 0 0In the money 0New 0.00%
17 17 0 89.31% 155.00 0 0In the money 0New 73.76%
17 17 0 92.68% 160.00 0 0In the money 0New 0.00%
16 16 0 95.90% 165.00 0 0In the money 0New 81.99%
22 22 0 88.26% 170.00 0 0In the money 0New 85.65%
4 4 0 98.20% 175.00 0 0In the money 0New 0.00%
1 1 0 104.89% 180.00 0 0In the money 0New 0.00%
0 0 0New 107.67% 185.00 0 0In the money 0New 0.00%
0 0 0New 110.37% 190.00 0 0In the money 0New 0.00%
0 0 0New 112.97% 195.00 0 0In the money 0New 0.00%
102 102 0 103.60% 200.00 0 0In the money 0New 0.00%
0 0 0New 120.32% 210.00 0 0In the money 0New 0.00%
0 0 0New 143.17% 220.00 0 0In the money 0New 0.00%
Jan 15, 2027EXPIRATION84 contracts / 42 strikes
SAVED STOCK PRICE$80.75Nearest ATM strike $80.00
Jump to ATM
ZTS option chain expiring 2027-01-15, open interest on 2026-10-23 compared with 2026-10-21
CallsStrikePuts
Prev OIOpen interestChangeIVPrev OIOpen interestChangeIV
15 15In the money 0 0.00% 40.00 2,180 2,180 0 65.75%
6 6In the money 0 58.44% 45.00 3,338 3,338 0 68.24%
131 131In the money 0 54.42% 50.00 315 315 0 73.89%
5 5In the money 0 44.88% 55.00 249 251 +2 55.23%
242 242In the money 0 40.48% 60.00 1,801 1,810 +9 42.37%
47 47In the money 0 44.01% 65.00 2,307 2,196 -111 41.73%
228 234In the money +6 40.29% 70.00 2,050 2,038 -12 39.29%
611 588In the money -23 40.62% 75.00 2,833 2,837 +4 40.07%
1,101 1,076In the money -25 37.98% 80.00NEAREST ATM 688 754 +66 38.25%
STOCK PRICE $80.75
1,820 1,992 +172 38.44% 85.00 143 143In the money 0 39.33%
1,664 1,657 -7 37.09% 90.00 113 113In the money 0 36.78%
793 798 +5 39.03% 95.00 40 40In the money 0 36.14%
1,201 1,297 +96 36.87% 100.00 76 74In the money -2 35.50%
3,750 3,688 -62 40.62% 105.00 62 64In the money +2 36.27%
415 415 0 46.08% 110.00 67 67In the money 0 0.00%
795 795 0 47.13% 115.00 5 5In the money 0 0.00%
179 179 0 43.82% 120.00 9 9In the money 0 0.00%
216 216 0 45.72% 125.00 3 3In the money 0 0.00%
174 174 0 50.84% 130.00 1 1In the money 0 0.00%
64 64 0 60.42% 135.00 1 1In the money 0 0.00%
333 333 0 48.30% 140.00 1 1In the money 0 0.00%
70 70 0 60.08% 145.00 1 1In the money 0 0.00%
1,426 1,426 0 47.34% 150.00 1 3In the money +2 59.43%
57 57 0 49.53% 155.00 1 1In the money 0 0.00%
85 85 0 51.64% 160.00 10 10In the money 0 0.00%
93 93 0 53.67% 165.00 0 0In the money 0New 0.00%
76 76 0 80.67% 170.00 0 0In the money 0New 0.00%
3,824 3,824 0 57.52% 175.00 0 0In the money 0New 0.00%
38 38 0 85.48% 180.00 0 0In the money 0New 0.00%
34 34 0 90.57% 185.00 0 0In the money 0New 0.00%
13 13 0 89.96% 190.00 0 0In the money 0New 0.00%
74 74 0 88.78% 195.00 0 0In the money 0New 0.00%
56 56 0 66.12% 200.00 0 0In the money 0New 0.00%
25 25 0 98.09% 210.00 0 0In the money 0New 0.00%
23 23 0 116.75% 220.00 0 0In the money 0New 0.00%
6 6 0 120.56% 230.00 0 0In the money 0New 0.00%
5 5 0 124.13% 240.00 0 0In the money 0New 0.00%
33 33 0 127.56% 250.00 0 0In the money 0New 0.00%
5 5 0 130.82% 260.00 0 0In the money 0New 0.00%
30 30 0 84.79% 270.00 0 0In the money 0New 0.00%
0 0 0New 136.92% 280.00 0 0In the money 0New 0.00%
41 41 0 139.77% 290.00 0 0In the money 0New 0.00%
Mar 19, 2027EXPIRATION64 contracts / 32 strikes
SAVED STOCK PRICE$80.75Nearest ATM strike $80.00
Jump to ATM
ZTS option chain expiring 2027-03-19, open interest on 2026-10-23 compared with 2026-10-21
CallsStrikePuts
Prev OIOpen interestChangeIVPrev OIOpen interestChangeIV
1 1In the money 0 0.00% 40.00 1,281 1,281 0 53.76%
2 2In the money 0 0.00% 45.00 2,567 2,567 0 69.72%
19 19In the money 0 47.83% 50.00 925 925 0 52.92%
22 21In the money -1 46.88% 55.00 380 380 0 48.38%
26 26In the money 0 41.67% 60.00 621 620 -1 41.87%
87 89In the money +2 44.56% 65.00 691 709 +18 40.15%
152 152In the money 0 40.72% 70.00 660 655 -5 40.17%
955 951In the money -4 40.63% 75.00 507 505 -2 39.77%
998 999In the money +1 37.58% 80.00NEAREST ATM 238 241 +3 39.49%
STOCK PRICE $80.75
882 885 +3 38.49% 85.00 130 130In the money 0 40.24%
2,242 2,233 -9 39.16% 90.00 555 555In the money 0 39.74%
1,008 1,009 +1 39.46% 95.00 9 9In the money 0 40.36%
1,211 1,210 -1 39.27% 100.00 21 21In the money 0 40.29%
72 72 0 40.25% 105.00 52 52In the money 0 39.94%
123 123 0 40.56% 110.00 18 18In the money 0 38.16%
77 78 +1 40.99% 115.00 21 21In the money 0 40.54%
72 72 0 40.81% 120.00 0 0In the money 0New 0.00%
78 78 0 48.82% 125.00 0 0In the money 0New 0.00%
13 13 0 52.99% 130.00 0 0In the money 0New 39.29%
2 2 0 55.43% 135.00 0 0In the money 0New 0.00%
36 36 0 57.96% 140.00 0 0In the money 0New 0.00%
1 1 0 60.33% 145.00 0 0In the money 0New 0.00%
42 42 0 53.93% 150.00 0 0In the money 0New 0.00%
0 0 0New 64.96% 155.00 0 0In the money 0New 56.14%
0 0 0New 67.26% 160.00 0 0In the money 0New 0.00%
10 10 0 69.15% 165.00 0 0In the money 0New 61.57%
1 1 0 71.26% 170.00 0 0In the money 0New 0.00%
0 0 0New 73.30% 175.00 0 0In the money 0New 0.00%
0 0 0New 75.26% 180.00 0 0In the money 0New 0.00%
0 0 0New 76.80% 185.00 0 0In the money 0New 0.00%
0 0 0New 78.62% 190.00 0 0In the money 0New 0.00%
0 0 0New 80.38% 195.00 0 0In the money 0New 0.00%
Apr 16, 2027EXPIRATION32 contracts / 16 strikes
SAVED STOCK PRICE$80.75Nearest ATM strike $80.00
Jump to ATM
ZTS option chain expiring 2027-04-16, open interest on 2026-10-23 compared with 2026-10-21
CallsStrikePuts
Prev OIOpen interestChangeIVPrev OIOpen interestChangeIV
0 0In the money 0New 0.00% 40.00 0 0 0New 64.67%
0 0In the money 0New 39.67% 45.00 483 483 0 52.59%
0 0In the money 0New 46.11% 50.00 14 15 +1 47.90%
2 2In the money 0 44.90% 55.00 30 30 0 43.29%
0 0In the money 0New 41.58% 60.00 75 75 0 41.35%
0 0In the money 0New 41.16% 65.00 80 72 -8 40.95%
8 8In the money 0 39.64% 70.00 75 76 +1 41.03%
6 6In the money 0 39.80% 75.00 47 51 +4 40.36%
238 250In the money +12 40.10% 80.00NEAREST ATM 89 89 0 39.90%
STOCK PRICE $80.75
28 28 0 39.76% 85.00 18 20In the money +2 40.36%
16 16 0 39.65% 90.00 0 0In the money 0New 39.13%
10 22 +12 39.04% 95.00 0 0In the money 0New 39.42%
78 79 +1 38.09% 100.00 0 0In the money 0New 38.80%
8 8 0 39.16% 105.00 0 0In the money 0New 37.74%
12 12 0 39.29% 110.00 0 0In the money 0New 37.55%
29 29 0 39.49% 115.00 0 0In the money 0New 39.54%
Jun 17, 2027EXPIRATION32 contracts / 16 strikes
SAVED STOCK PRICE$80.75Nearest ATM strike $80.00
Jump to ATM
ZTS option chain expiring 2027-06-17, open interest on 2026-10-23 compared with 2026-10-21
CallsStrikePuts
Prev OIOpen interestChangeIVPrev OIOpen interestChangeIV
55 55In the money 0 46.01% 40.00 410 410 0 46.71%
13 13In the money 0 48.42% 45.00 2 2 0 46.29%
647 646In the money -1 46.34% 50.00 41 41 0 51.52%
32 32In the money 0 44.12% 55.00 127 127 0 49.12%
22 25In the money +3 43.74% 60.00 128 127 -1 41.48%
87 90In the money +3 42.06% 65.00 237 242 +5 40.85%
72 66In the money -6 40.76% 70.00 292 292 0 40.98%
171 172In the money +1 40.84% 75.00 235 237 +2 39.99%
165 157In the money -8 41.98% 80.00NEAREST ATM 98 94 -4 39.34%
STOCK PRICE $80.75
359 359 0 40.25% 85.00 52 52In the money 0 39.34%
148 136 -12 38.60% 90.00 2 2In the money 0 39.29%
279 278 -1 39.92% 95.00 3 3In the money 0 39.34%
512 510 -2 39.80% 100.00 23 23In the money 0 38.31%
46 54 +8 39.87% 105.00 3 3In the money 0 39.13%
46 46 0 40.08% 110.00 4 4In the money 0 38.56%
62 61 -1 40.21% 115.00 1 1In the money 0 38.49%
Sep 17, 2027EXPIRATION32 contracts / 16 strikes
SAVED STOCK PRICE$80.75Nearest ATM strike $80.00
Jump to ATM
ZTS option chain expiring 2027-09-17, open interest on 2026-10-23 compared with 2026-10-21
CallsStrikePuts
Prev OIOpen interestChangeIVPrev OIOpen interestChangeIV
63 62In the money -1 46.11% 40.00 1,220 1,220 0 45.48%
1 1In the money 0 44.38% 45.00 3 3 0 45.14%
4 1In the money -3 44.58% 50.00 13 13 0 45.90%
8 8In the money 0 41.24% 55.00 10 11 +1 41.72%
31 31In the money 0 41.36% 60.00 16 16 0 41.00%
11 11In the money 0 41.74% 65.00 93 93 0 40.90%
18 18In the money 0 41.25% 70.00 45 45 0 40.16%
132 132In the money 0 40.91% 75.00 7 7 0 39.57%
55 55In the money 0 40.87% 80.00NEAREST ATM 5 6 +1 40.09%
STOCK PRICE $80.75
28 29 +1 39.48% 85.00 7 7In the money 0 39.45%
52 49 -3 39.51% 90.00 1 1In the money 0 38.44%
6 6 0 39.34% 95.00 0 0In the money 0New 38.65%
102 102 0 39.41% 100.00 1 1In the money 0 38.46%
30 30 0 38.56% 105.00 0 0In the money 0New 37.68%
15 15 0 39.28% 110.00 1 1In the money 0 38.09%
17 18 +1 39.56% 115.00 1 1In the money 0 37.81%
Jan 21, 2028EXPIRATION70 contracts / 35 strikes
SAVED STOCK PRICE$80.75Nearest ATM strike $80.00
Jump to ATM
ZTS option chain expiring 2028-01-21, open interest on 2026-10-23 compared with 2026-10-21
CallsStrikePuts
Prev OIOpen interestChangeIVPrev OIOpen interestChangeIV
5,092 5,091In the money -1 41.91% 40.00 60 60 0 41.71%
99 98In the money -1 46.04% 45.00 283 283 0 41.40%
810 775In the money -35 43.34% 50.00 146 146 0 45.78%
122 122In the money 0 43.18% 55.00 89 88 -1 40.41%
658 655In the money -3 42.45% 60.00 351 350 -1 42.29%
90 90In the money 0 41.37% 65.00 149 156 +7 40.82%
297 295In the money -2 40.38% 70.00 538 536 -2 40.68%
36,765 36,745In the money -20 39.71% 75.00 796 796 0 40.05%
518 504In the money -14 40.08% 80.00NEAREST ATM 416 416 0 39.32%
STOCK PRICE $80.75
126 121 -5 39.77% 85.00 317 316In the money -1 38.87%
981 980 -1 39.85% 90.00 376 376In the money 0 38.88%
249 248 -1 38.91% 95.00 100 100In the money 0 38.76%
962 929 -33 38.84% 100.00 254 250In the money -4 38.51%
908 908 0 38.95% 105.00 44 44In the money 0 38.36%
416 411 -5 38.84% 110.00 164 164In the money 0 38.16%
181 181 0 39.71% 115.00 184 184In the money 0 39.82%
115 113 -2 38.75% 120.00 75 75In the money 0 39.35%
231 227 -4 37.60% 125.00 132 132In the money 0 38.23%
1,277 1,277 0 37.33% 130.00 35 35In the money 0 38.02%
218 218 0 40.39% 135.00 25 25In the money 0 36.50%
460 460 0 40.01% 140.00 0 0In the money 0New 0.00%
76 76 0 39.50% 145.00 0 0In the money 0New 0.00%
875 875 0 40.83% 150.00 5 5In the money 0 0.00%
59 59 0 42.34% 155.00 0 0In the money 0New 0.00%
46 46 0 41.06% 160.00 0 0In the money 0New 0.00%
41 41 0 39.57% 165.00 0 0In the money 0New 0.00%
35 35 0 42.92% 170.00 0 0In the money 0New 0.00%
44 44 0 43.84% 175.00 0 0In the money 0New 0.00%
33 33 0 45.16% 180.00 0 0In the money 0New 0.00%
459 458 -1 39.88% 185.00 0 0In the money 0New 0.00%
319 319 0 38.12% 190.00 0 0In the money 0New 0.00%
98 98 0 38.68% 195.00 0 0In the money 0New 0.00%
176 176 0 40.58% 200.00 0 0In the money 0New 0.00%
10 10 0 50.33% 210.00 0 0In the money 0New 0.00%
1,518 1,503 -15 39.62% 220.00 12 12In the money 0 0.00%
Jan 19, 2029EXPIRATION30 contracts / 15 strikes
SAVED STOCK PRICE$80.75Nearest ATM strike $80.00
Jump to ATM
ZTS option chain expiring 2029-01-19, open interest on 2026-10-23 compared with 2026-10-21
CallsStrikePuts
Prev OIOpen interestChangeIVPrev OIOpen interestChangeIV
31 160In the money +129 48.76% 40.00 4 4 0 47.15%
12 135In the money +123 42.15% 45.00 20 20 0 41.06%
39 42In the money +3 43.98% 50.00 15 15 0 42.42%
0 1In the money +1New 41.76% 55.00 5 5 0 42.33%
4 4In the money 0 41.95% 60.00 8 8 0 42.65%
2 2In the money 0 40.80% 65.00 22 22 0 40.90%
24 24In the money 0 41.02% 70.00 28 28 0 40.26%
9 8In the money -1 40.96% 75.00 2 2 0 42.74%
11 11In the money 0 41.22% 80.00NEAREST ATM 4 4 0 41.59%
STOCK PRICE $80.75
20 19 -1 40.74% 85.00 3 3In the money 0 40.73%
11 11 0 41.23% 90.00 17 17In the money 0 40.48%
23 23 0 40.40% 95.00 10 10In the money 0 40.59%
44 43 -1 40.36% 100.00 11 12In the money +1 40.41%
97 97 0 40.06% 105.00 0 1In the money +1New 38.95%
508 529 +21 41.12% 110.00 2 108In the money +106 39.82%

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