# BIIB Options Open Interest by Strike, Oct 21 Settlement

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.

## Expiration 2026-10-23

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 120 | put | 1 | 1 | 0 |
| 185 | put | 1 | 1 | 0 |
| 200 | put | 7 | 7 | 0 |
| 202.5 | put | 53 | 53 | 0 |
| 207.5 | put | 6 | 6 | 0 |
| 210 | call | 2 | 2 | 0 |
| 210 | put | 12 | 12 | 0 |
| 212.5 | put | 6 | 6 | 0 |
| 215 | call | 7 | 7 | 0 |
| 215 | put | 309 | 309 | 0 |
| 217.5 | call | 1 | 1 | 0 |
| 220 | call | 208 | 208 | 0 |
| 220 | put | 764 | 764 | 0 |
| 222.5 | call | 1 | 1 | 0 |
| 222.5 | put | 7 | 7 | 0 |
| 225 | call | 210 | 209 | -1 |
| 225 | put | 54 | 54 | 0 |
| 227.5 | call | 4 | 4 | 0 |
| 227.5 | put | 4 | 3 | -1 |
| 230 | call | 411 | 411 | 0 |
| 230 | put | 532 | 522 | -10 |
| 232.5 | call | 14 | 14 | 0 |
| 232.5 | put | 253 | 275 | +22 |
| 235 | call | 32 | 32 | 0 |
| 235 | put | 21 | 21 | 0 |
| 237.5 | call | 10 | 10 | 0 |
| 237.5 | put | 0 | 1 | +1 |
| 240 | call | 297 | 294 | -3 |
| 240 | put | 5 | 12 | +7 |
| 242.5 | call | 10 | 16 | +6 |
| 242.5 | put | 2 | 3 | +1 |
| 245 | call | 80 | 79 | -1 |
| 245 | put | 1 | 1 | 0 |
| 247.5 | call | 15 | 23 | +8 |
| 250 | call | 68 | 71 | +3 |
| 252.5 | call | 3 | 5 | +2 |
| 255 | call | 2 | 3 | +1 |
| 257.5 | call | 1 | 1 | 0 |
| 257.5 | put | 0 | 2 | +2 |
| 260 | call | 42 | 48 | +6 |
| 265 | call | 115 | 389 | +274 |
| 270 | call | 1 | 1 | 0 |

## Expiration 2026-10-30

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 180 | call | 2 | 2 | 0 |
| 180 | put | 1 | 1 | 0 |
| 185 | put | 2 | 2 | 0 |
| 190 | put | 39 | 39 | 0 |
| 195 | call | 1 | 1 | 0 |
| 195 | put | 1 | 1 | 0 |
| 200 | put | 18 | 18 | 0 |
| 202.5 | put | 4 | 4 | 0 |
| 205 | put | 23 | 23 | 0 |
| 210 | call | 4 | 4 | 0 |
| 210 | put | 24 | 185 | +161 |
| 215 | call | 1 | 1 | 0 |
| 215 | put | 245 | 244 | -1 |
| 217.5 | put | 1 | 1 | 0 |
| 220 | call | 36 | 39 | +3 |
| 220 | put | 30 | 30 | 0 |
| 222.5 | put | 1 | 1 | 0 |
| 225 | call | 54 | 54 | 0 |
| 225 | put | 57 | 57 | 0 |
| 227.5 | call | 1 | 1 | 0 |
| 227.5 | put | 5 | 4 | -1 |
| 230 | call | 21 | 21 | 0 |
| 230 | put | 12 | 13 | +1 |
| 232.5 | call | 10 | 10 | 0 |
| 232.5 | put | 2 | 2 | 0 |
| 235 | call | 23 | 23 | 0 |
| 235 | put | 1 | 18 | +17 |
| 237.5 | call | 1 | 4 | +3 |
| 237.5 | put | 4 | 5 | +1 |
| 240 | call | 318 | 317 | -1 |
| 240 | put | 4 | 35 | +31 |
| 242.5 | call | 4 | 3 | -1 |
| 245 | call | 15 | 16 | +1 |
| 250 | call | 8 | 13 | +5 |
| 255 | call | 17 | 19 | +2 |
| 255 | put | 1 | 1 | 0 |
| 260 | call | 1 | 1 | 0 |
| 265 | call | 1 | 0 | -1 |
| 270 | call | 0 | 2 | +2 |
| 275 | call | 5 | 6 | +1 |
| 290 | call | 1 | 1 | 0 |
| 295 | call | 2 | 2 | 0 |
| 300 | call | 1 | 1 | 0 |

## Expiration 2026-11-06

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 185 | put | 1 | 1 | 0 |
| 200 | put | 11 | 11 | 0 |
| 205 | put | 14 | 14 | 0 |
| 210 | put | 1 | 0 | -1 |
| 215 | put | 4 | 4 | 0 |
| 220 | call | 37 | 37 | 0 |
| 220 | put | 9 | 9 | 0 |
| 225 | call | 261 | 260 | -1 |
| 225 | put | 8 | 8 | 0 |
| 230 | call | 105 | 104 | -1 |
| 230 | put | 3 | 3 | 0 |
| 235 | call | 146 | 145 | -1 |
| 235 | put | 9 | 9 | 0 |
| 240 | call | 26 | 26 | 0 |
| 242.5 | call | 0 | 1 | +1 |
| 245 | call | 7 | 11 | +4 |
| 250 | call | 5 | 5 | 0 |
| 252.5 | call | 0 | 1 | +1 |
| 255 | call | 10 | 10 | 0 |
| 260 | call | 2 | 3 | +1 |
| 265 | call | 4 | 4 | 0 |
| 270 | call | 1 | 2 | +1 |
| 285 | call | 0 | 1 | +1 |

## Expiration 2026-11-13

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 115 | put | 1 | 1 | 0 |
| 190 | put | 3 | 1 | -2 |
| 195 | put | 84 | 73 | -11 |
| 200 | put | 9 | 1 | -8 |
| 205 | put | 2 | 2 | 0 |
| 210 | put | 6 | 5 | -1 |
| 220 | put | 0 | 6 | +6 |
| 225 | call | 1 | 1 | 0 |
| 225 | put | 7 | 7 | 0 |
| 230 | call | 8 | 1 | -7 |
| 230 | put | 7 | 7 | 0 |
| 235 | call | 10 | 28 | +18 |
| 235 | put | 11 | 11 | 0 |
| 240 | call | 2 | 3 | +1 |
| 240 | put | 0 | 26 | +26 |
| 245 | call | 4 | 4 | 0 |
| 250 | call | 0 | 3 | +3 |
| 260 | call | 1 | 1 | 0 |
| 265 | call | 0 | 7 | +7 |
| 295 | call | 1 | 1 | 0 |

## Expiration 2026-11-20

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 115 | put | 7 | 7 | 0 |
| 130 | call | 1 | 1 | 0 |
| 160 | put | 2 | 2 | 0 |
| 165 | put | 15 | 15 | 0 |
| 170 | put | 3 | 3 | 0 |
| 175 | put | 3 | 3 | 0 |
| 180 | put | 12 | 12 | 0 |
| 185 | put | 10 | 10 | 0 |
| 190 | call | 450 | 450 | 0 |
| 190 | put | 6 | 6 | 0 |
| 195 | put | 101 | 101 | 0 |
| 200 | call | 7 | 7 | 0 |
| 200 | put | 35 | 35 | 0 |
| 210 | call | 4 | 5 | +1 |
| 210 | put | 233 | 233 | 0 |
| 215 | put | 1 | 1 | 0 |
| 220 | call | 30 | 30 | 0 |
| 220 | put | 18 | 17 | -1 |
| 230 | call | 130 | 130 | 0 |
| 230 | put | 23 | 25 | +2 |
| 235 | call | 1 | 2 | +1 |
| 235 | put | 10 | 10 | 0 |
| 240 | call | 352 | 347 | -5 |
| 240 | put | 2 | 3 | +1 |
| 242.5 | call | 0 | 1 | +1 |
| 245 | call | 40 | 43 | +3 |
| 247.5 | call | 0 | 1 | +1 |
| 250 | call | 158 | 124 | -34 |
| 255 | call | 6 | 6 | 0 |
| 260 | call | 177 | 236 | +59 |
| 265 | call | 2 | 2 | 0 |
| 270 | call | 15 | 15 | 0 |
| 270 | put | 1 | 1 | 0 |
| 280 | call | 19 | 20 | +1 |
| 280 | put | 1 | 6 | +5 |
| 290 | call | 0 | 4 | +4 |
| 300 | call | 4 | 4 | 0 |
| 320 | call | 1 | 1 | 0 |

## Expiration 2026-11-27

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 145 | put | 1 | 1 | 0 |
| 195 | put | 1 | 1 | 0 |
| 200 | put | 1 | 1 | 0 |
| 205 | put | 1 | 1 | 0 |
| 210 | put | 1 | 1 | 0 |
| 215 | put | 1 | 1 | 0 |
| 220 | put | 1 | 1 | 0 |
| 230 | call | 2 | 2 | 0 |
| 235 | call | 5 | 5 | 0 |
| 240 | call | 1 | 1 | 0 |
| 250 | call | 1 | 1 | 0 |
| 255 | call | 2 | 2 | 0 |
| 260 | call | 1 | 1 | 0 |
| 265 | call | 0 | 1 | +1 |

## Expiration 2026-12-18

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 60 | put | 1 | 1 | 0 |
| 65 | call | 1 | 1 | 0 |
| 70 | call | 2 | 2 | 0 |
| 70 | put | 5 | 5 | 0 |
| 75 | call | 3 | 3 | 0 |
| 75 | put | 501 | 501 | 0 |
| 80 | put | 172 | 172 | 0 |
| 85 | call | 2 | 2 | 0 |
| 85 | put | 19 | 19 | 0 |
| 90 | put | 51 | 51 | 0 |
| 95 | put | 28 | 28 | 0 |
| 100 | call | 18 | 18 | 0 |
| 100 | put | 5 | 5 | 0 |
| 105 | call | 2 | 2 | 0 |
| 105 | put | 17 | 17 | 0 |
| 110 | call | 5 | 5 | 0 |
| 110 | put | 62 | 62 | 0 |
| 115 | call | 1 | 1 | 0 |
| 115 | put | 45 | 45 | 0 |
| 120 | call | 68 | 68 | 0 |
| 120 | put | 308 | 308 | 0 |
| 125 | call | 9 | 9 | 0 |
| 125 | put | 449 | 449 | 0 |
| 130 | call | 17 | 17 | 0 |
| 130 | put | 87 | 87 | 0 |
| 135 | call | 7 | 7 | 0 |
| 135 | put | 42 | 42 | 0 |
| 140 | call | 14 | 14 | 0 |
| 140 | put | 37 | 37 | 0 |
| 145 | call | 28 | 28 | 0 |
| 145 | put | 58 | 58 | 0 |
| 150 | call | 12 | 12 | 0 |
| 150 | put | 262 | 262 | 0 |
| 155 | call | 21 | 21 | 0 |
| 155 | put | 14 | 14 | 0 |
| 160 | call | 287 | 287 | 0 |
| 160 | put | 236 | 236 | 0 |
| 165 | call | 21 | 21 | 0 |
| 165 | put | 110 | 110 | 0 |
| 170 | call | 71 | 71 | 0 |
| 170 | put | 221 | 221 | 0 |
| 175 | call | 36 | 36 | 0 |
| 175 | put | 117 | 117 | 0 |
| 180 | call | 58 | 58 | 0 |
| 180 | put | 661 | 661 | 0 |
| 185 | call | 386 | 386 | 0 |
| 185 | put | 70 | 70 | 0 |
| 190 | call | 70 | 70 | 0 |
| 190 | put | 89 | 89 | 0 |
| 195 | call | 147 | 147 | 0 |
| 195 | put | 85 | 85 | 0 |
| 200 | call | 726 | 726 | 0 |
| 200 | put | 214 | 214 | 0 |
| 205 | call | 138 | 138 | 0 |
| 205 | put | 43 | 44 | +1 |
| 210 | call | 309 | 309 | 0 |
| 210 | put | 333 | 336 | +3 |
| 215 | call | 148 | 149 | +1 |
| 215 | put | 21 | 21 | 0 |
| 220 | call | 91 | 91 | 0 |
| 220 | put | 36 | 46 | +10 |
| 225 | call | 44 | 44 | 0 |
| 225 | put | 162 | 172 | +10 |
| 230 | call | 299 | 299 | 0 |
| 230 | put | 836 | 1331 | +495 |
| 235 | call | 221 | 219 | -2 |
| 235 | put | 5 | 353 | +348 |
| 240 | call | 664 | 1155 | +491 |
| 240 | put | 13 | 13 | 0 |
| 245 | call | 630 | 1083 | +453 |
| 245 | put | 0 | 1 | +1 |
| 250 | call | 316 | 316 | 0 |
| 255 | call | 191 | 190 | -1 |
| 260 | call | 98 | 98 | 0 |
| 260 | put | 2 | 2 | 0 |
| 265 | call | 63 | 67 | +4 |
| 270 | call | 26 | 28 | +2 |
| 270 | put | 11 | 11 | 0 |
| 275 | call | 70 | 70 | 0 |
| 280 | call | 16 | 19 | +3 |
| 285 | call | 26 | 26 | 0 |
| 290 | call | 50 | 52 | +2 |
| 295 | call | 19 | 19 | 0 |
| 300 | call | 67 | 68 | +1 |
| 305 | call | 25 | 25 | 0 |
| 310 | call | 13 | 13 | 0 |
| 315 | call | 46 | 46 | 0 |
| 320 | call | 1 | 1 | 0 |
| 330 | call | 11 | 11 | 0 |
| 340 | call | 9 | 9 | 0 |
| 350 | call | 51 | 51 | 0 |

## Expiration 2027-01-15

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 60 | call | 3 | 3 | 0 |
| 60 | put | 18 | 18 | 0 |
| 65 | call | 1 | 1 | 0 |
| 65 | put | 1 | 1 | 0 |
| 70 | call | 11 | 11 | 0 |
| 70 | put | 12 | 12 | 0 |
| 75 | call | 18 | 18 | 0 |
| 75 | put | 26 | 26 | 0 |
| 80 | call | 53 | 53 | 0 |
| 80 | put | 17 | 17 | 0 |
| 85 | call | 49 | 49 | 0 |
| 85 | put | 43 | 43 | 0 |
| 90 | call | 41 | 41 | 0 |
| 90 | put | 23 | 23 | 0 |
| 95 | call | 7 | 7 | 0 |
| 95 | put | 68 | 68 | 0 |
| 100 | call | 25 | 25 | 0 |
| 100 | put | 1070 | 1070 | 0 |
| 105 | call | 15 | 15 | 0 |
| 105 | put | 823 | 823 | 0 |
| 110 | call | 57 | 57 | 0 |
| 110 | put | 1099 | 1099 | 0 |
| 115 | call | 21 | 21 | 0 |
| 115 | put | 527 | 527 | 0 |
| 120 | call | 51 | 51 | 0 |
| 120 | put | 346 | 346 | 0 |
| 125 | call | 13 | 13 | 0 |
| 125 | put | 64 | 64 | 0 |
| 130 | call | 129 | 129 | 0 |
| 130 | put | 135 | 135 | 0 |
| 135 | call | 34 | 34 | 0 |
| 135 | put | 74 | 74 | 0 |
| 140 | call | 56 | 56 | 0 |
| 140 | put | 47 | 47 | 0 |
| 145 | call | 28 | 28 | 0 |
| 145 | put | 62 | 62 | 0 |
| 150 | call | 372 | 372 | 0 |
| 150 | put | 329 | 329 | 0 |
| 155 | call | 34 | 34 | 0 |
| 155 | put | 190 | 190 | 0 |
| 160 | call | 36 | 36 | 0 |
| 160 | put | 227 | 227 | 0 |
| 165 | call | 14 | 14 | 0 |
| 165 | put | 105 | 105 | 0 |
| 170 | call | 68 | 68 | 0 |
| 170 | put | 63 | 63 | 0 |
| 175 | call | 144 | 144 | 0 |
| 175 | put | 109 | 109 | 0 |
| 180 | call | 534 | 534 | 0 |
| 180 | put | 361 | 361 | 0 |
| 185 | call | 84 | 84 | 0 |
| 185 | put | 27 | 27 | 0 |
| 190 | call | 51 | 51 | 0 |
| 190 | put | 54 | 54 | 0 |
| 195 | call | 55 | 55 | 0 |
| 195 | put | 577 | 577 | 0 |
| 200 | call | 245 | 245 | 0 |
| 200 | put | 624 | 624 | 0 |
| 210 | call | 816 | 815 | -1 |
| 210 | put | 84 | 84 | 0 |
| 220 | call | 222 | 222 | 0 |
| 220 | put | 57 | 57 | 0 |
| 230 | call | 1073 | 1068 | -5 |
| 230 | put | 23 | 23 | 0 |
| 240 | call | 970 | 970 | 0 |
| 240 | put | 22 | 22 | 0 |
| 250 | call | 855 | 958 | +103 |
| 250 | put | 97 | 97 | 0 |
| 260 | call | 357 | 363 | +6 |
| 260 | put | 9 | 9 | 0 |
| 270 | call | 44 | 44 | 0 |
| 270 | put | 6 | 6 | 0 |
| 280 | call | 623 | 623 | 0 |
| 280 | put | 1 | 1 | 0 |
| 290 | call | 66 | 66 | 0 |
| 300 | call | 748 | 787 | +39 |
| 310 | call | 5 | 5 | 0 |
| 320 | call | 8 | 8 | 0 |
| 330 | call | 0 | 3 | +3 |

## Expiration 2027-03-19

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 90 | call | 1 | 1 | 0 |
| 90 | put | 20 | 20 | 0 |
| 95 | call | 3 | 3 | 0 |
| 95 | put | 7 | 7 | 0 |
| 100 | call | 1 | 1 | 0 |
| 100 | put | 6 | 6 | 0 |
| 105 | call | 14 | 14 | 0 |
| 110 | put | 5 | 5 | 0 |
| 115 | put | 3 | 3 | 0 |
| 120 | call | 1 | 1 | 0 |
| 120 | put | 4 | 4 | 0 |
| 125 | call | 5 | 5 | 0 |
| 125 | put | 10 | 10 | 0 |
| 130 | put | 16 | 16 | 0 |
| 135 | call | 1 | 1 | 0 |
| 135 | put | 33 | 33 | 0 |
| 140 | call | 1 | 1 | 0 |
| 140 | put | 118 | 118 | 0 |
| 145 | put | 36 | 36 | 0 |
| 150 | call | 11 | 11 | 0 |
| 150 | put | 57 | 57 | 0 |
| 155 | call | 4 | 4 | 0 |
| 155 | put | 11 | 11 | 0 |
| 160 | call | 3 | 3 | 0 |
| 160 | put | 12 | 12 | 0 |
| 165 | call | 6 | 6 | 0 |
| 165 | put | 27 | 27 | 0 |
| 170 | call | 36 | 36 | 0 |
| 170 | put | 99 | 99 | 0 |
| 175 | call | 10 | 10 | 0 |
| 175 | put | 22 | 22 | 0 |
| 180 | call | 5 | 5 | 0 |
| 180 | put | 80 | 80 | 0 |
| 185 | call | 4 | 4 | 0 |
| 185 | put | 19 | 19 | 0 |
| 190 | call | 12 | 12 | 0 |
| 190 | put | 16 | 16 | 0 |
| 195 | call | 20 | 18 | -2 |
| 195 | put | 66 | 66 | 0 |
| 200 | call | 42 | 42 | 0 |
| 200 | put | 117 | 117 | 0 |
| 210 | call | 63 | 63 | 0 |
| 210 | put | 24 | 24 | 0 |
| 220 | call | 670 | 671 | +1 |
| 220 | put | 23 | 227 | +204 |
| 230 | call | 60 | 60 | 0 |
| 230 | put | 62 | 62 | 0 |
| 240 | call | 50 | 49 | -1 |
| 240 | put | 4 | 4 | 0 |
| 250 | call | 143 | 138 | -5 |
| 250 | put | 10 | 10 | 0 |
| 260 | call | 82 | 79 | -3 |
| 270 | call | 9 | 9 | 0 |
| 270 | put | 9 | 9 | 0 |
| 280 | call | 32 | 34 | +2 |
| 280 | put | 1 | 1 | 0 |
| 290 | call | 262 | 262 | 0 |
| 300 | call | 39 | 39 | 0 |
| 310 | call | 26 | 26 | 0 |
| 320 | call | 65 | 66 | +1 |
| 330 | call | 12 | 12 | 0 |
| 340 | call | 24 | 25 | +1 |

## Expiration 2027-04-16

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 120 | put | 3 | 3 | 0 |
| 125 | put | 4 | 4 | 0 |
| 130 | call | 5 | 5 | 0 |
| 130 | put | 1 | 1 | 0 |
| 135 | put | 1 | 1 | 0 |
| 140 | put | 1 | 1 | 0 |
| 145 | put | 1 | 1 | 0 |
| 155 | put | 5 | 3 | -2 |
| 160 | put | 4 | 4 | 0 |
| 170 | put | 105 | 105 | 0 |
| 175 | put | 2 | 2 | 0 |
| 180 | put | 22 | 22 | 0 |
| 185 | put | 21 | 21 | 0 |
| 190 | put | 2 | 2 | 0 |
| 195 | put | 10 | 10 | 0 |
| 200 | call | 5 | 5 | 0 |
| 210 | call | 12 | 12 | 0 |
| 220 | call | 79 | 79 | 0 |
| 230 | call | 1 | 1 | 0 |
| 230 | put | 4 | 4 | 0 |
| 240 | call | 4 | 4 | 0 |
| 250 | call | 1 | 1 | 0 |
| 260 | call | 2 | 2 | 0 |
| 270 | call | 3 | 3 | 0 |
| 280 | call | 2 | 2 | 0 |
| 290 | call | 2 | 2 | 0 |
| 300 | call | 2 | 2 | 0 |
| 310 | call | 2 | 2 | 0 |
| 320 | call | 12 | 13 | +1 |
| 330 | call | 4 | 4 | 0 |
| 340 | call | 2 | 2 | 0 |

## Expiration 2027-06-17

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 90 | put | 2 | 2 | 0 |
| 95 | call | 1 | 1 | 0 |
| 95 | put | 5 | 5 | 0 |
| 100 | put | 5 | 5 | 0 |
| 105 | put | 1 | 1 | 0 |
| 110 | put | 3 | 3 | 0 |
| 115 | put | 5 | 5 | 0 |
| 120 | put | 4 | 4 | 0 |
| 125 | put | 3 | 3 | 0 |
| 130 | put | 4 | 4 | 0 |
| 135 | call | 9 | 9 | 0 |
| 135 | put | 4 | 4 | 0 |
| 140 | put | 2 | 2 | 0 |
| 145 | put | 88 | 88 | 0 |
| 150 | call | 3 | 3 | 0 |
| 150 | put | 24 | 24 | 0 |
| 155 | call | 2 | 2 | 0 |
| 155 | put | 8 | 8 | 0 |
| 160 | call | 3 | 3 | 0 |
| 160 | put | 21 | 21 | 0 |
| 165 | call | 1 | 1 | 0 |
| 165 | put | 1 | 1 | 0 |
| 170 | call | 5 | 5 | 0 |
| 170 | put | 86 | 86 | 0 |
| 175 | call | 5 | 5 | 0 |
| 175 | put | 58 | 58 | 0 |
| 180 | call | 6 | 6 | 0 |
| 180 | put | 32 | 32 | 0 |
| 185 | call | 2 | 2 | 0 |
| 190 | call | 4 | 4 | 0 |
| 190 | put | 19 | 19 | 0 |
| 195 | call | 8 | 8 | 0 |
| 195 | put | 63 | 63 | 0 |
| 200 | call | 20 | 20 | 0 |
| 200 | put | 2 | 2 | 0 |
| 210 | call | 5 | 5 | 0 |
| 210 | put | 7 | 7 | 0 |
| 220 | call | 236 | 236 | 0 |
| 220 | put | 258 | 259 | +1 |
| 230 | call | 16 | 16 | 0 |
| 230 | put | 4 | 4 | 0 |
| 240 | call | 69 | 70 | +1 |
| 250 | call | 9 | 10 | +1 |
| 250 | put | 0 | 89 | +89 |
| 260 | call | 241 | 241 | 0 |
| 270 | call | 14 | 14 | 0 |
| 280 | call | 40 | 41 | +1 |
| 290 | call | 2 | 90 | +88 |
| 300 | call | 39 | 39 | 0 |
| 310 | call | 1 | 1 | 0 |

## Expiration 2027-09-17

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 135 | put | 1 | 1 | 0 |
| 140 | call | 5 | 5 | 0 |
| 145 | put | 3 | 3 | 0 |
| 150 | put | 1 | 1 | 0 |
| 180 | call | 1 | 1 | 0 |
| 185 | put | 5 | 5 | 0 |
| 190 | put | 7 | 7 | 0 |
| 195 | call | 3 | 3 | 0 |
| 195 | put | 5 | 5 | 0 |
| 200 | call | 8 | 8 | 0 |
| 200 | put | 8 | 8 | 0 |
| 210 | call | 5 | 5 | 0 |
| 210 | put | 4 | 4 | 0 |
| 220 | call | 27 | 27 | 0 |
| 220 | put | 3 | 3 | 0 |
| 230 | call | 101 | 101 | 0 |
| 240 | call | 6 | 6 | 0 |
| 250 | put | 1 | 12 | +11 |
| 260 | call | 1 | 1 | 0 |
| 270 | call | 30 | 30 | 0 |
| 290 | call | 40 | 34 | -6 |
| 300 | call | 8 | 8 | 0 |
| 310 | call | 47 | 47 | 0 |
| 320 | call | 29 | 29 | 0 |
| 330 | call | 2 | 2 | 0 |
| 340 | call | 3 | 3 | 0 |

## Expiration 2028-01-21

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 70 | call | 2 | 2 | 0 |
| 70 | put | 3 | 3 | 0 |
| 75 | put | 15 | 15 | 0 |
| 80 | put | 2 | 2 | 0 |
| 85 | put | 25 | 25 | 0 |
| 90 | call | 1 | 1 | 0 |
| 90 | put | 4 | 4 | 0 |
| 95 | put | 73 | 73 | 0 |
| 100 | call | 15 | 15 | 0 |
| 100 | put | 2 | 2 | 0 |
| 105 | put | 5 | 5 | 0 |
| 110 | call | 5 | 5 | 0 |
| 110 | put | 31 | 31 | 0 |
| 115 | put | 2 | 2 | 0 |
| 120 | call | 5 | 5 | 0 |
| 120 | put | 16 | 16 | 0 |
| 125 | call | 2 | 2 | 0 |
| 125 | put | 1 | 1 | 0 |
| 130 | call | 5 | 5 | 0 |
| 130 | put | 2 | 2 | 0 |
| 135 | call | 3 | 3 | 0 |
| 135 | put | 1 | 1 | 0 |
| 140 | call | 30 | 30 | 0 |
| 140 | put | 10 | 10 | 0 |
| 145 | call | 5 | 5 | 0 |
| 145 | put | 6 | 6 | 0 |
| 150 | call | 2096 | 2096 | 0 |
| 150 | put | 28 | 28 | 0 |
| 155 | call | 17 | 17 | 0 |
| 155 | put | 4 | 4 | 0 |
| 160 | call | 3 | 3 | 0 |
| 160 | put | 4 | 4 | 0 |
| 165 | call | 12 | 12 | 0 |
| 165 | put | 109 | 109 | 0 |
| 170 | call | 26 | 26 | 0 |
| 170 | put | 3 | 3 | 0 |
| 175 | call | 23 | 23 | 0 |
| 175 | put | 34 | 34 | 0 |
| 180 | call | 8 | 8 | 0 |
| 180 | put | 92 | 92 | 0 |
| 185 | call | 17 | 17 | 0 |
| 185 | put | 25 | 25 | 0 |
| 190 | call | 19 | 19 | 0 |
| 190 | put | 464 | 464 | 0 |
| 195 | call | 384 | 384 | 0 |
| 195 | put | 55 | 55 | 0 |
| 200 | call | 58 | 58 | 0 |
| 200 | put | 210 | 210 | 0 |
| 210 | call | 8 | 8 | 0 |
| 220 | call | 29 | 28 | -1 |
| 220 | put | 271 | 271 | 0 |
| 230 | call | 22 | 22 | 0 |
| 230 | put | 1 | 1 | 0 |
| 240 | call | 11 | 11 | 0 |
| 250 | call | 288 | 287 | -1 |
| 260 | call | 15 | 15 | 0 |
| 270 | call | 15 | 15 | 0 |
| 270 | put | 1 | 1 | 0 |
| 280 | call | 30 | 30 | 0 |
| 290 | call | 55 | 55 | 0 |
| 310 | call | 3 | 3 | 0 |
| 320 | call | 7 | 7 | 0 |
| 330 | call | 4 | 4 | 0 |

## Expiration 2029-01-19

| Strike | Type | Prior OI | Settled OI | Change |
|---:|---|---:|---:|---:|
| 110 | call | 1 | 2 | +1 |
| 115 | put | 1 | 1 | 0 |
| 130 | put | 1 | 1 | 0 |
| 140 | put | 3 | 3 | 0 |
| 155 | call | 2 | 2 | 0 |
| 155 | put | 1 | 1 | 0 |
| 200 | call | 18 | 18 | 0 |
| 210 | call | 1 | 1 | 0 |
| 220 | call | 1 | 1 | 0 |
| 230 | call | 2 | 2 | 0 |
| 240 | call | 4 | 4 | 0 |
| 250 | call | 1 | 1 | 0 |
| 250 | put | 0 | 1 | +1 |
| 270 | call | 2 | 2 | 0 |
| 280 | call | 1 | 1 | 0 |
| 310 | call | 2 | 2 | 0 |
| 320 | call | 1 | 1 | 0 |
| 330 | call | 5 | 5 | 0 |
| 340 | call | 16 | 17 | +1 |

Source page: https://squawkflow.com/oi-changes/BIIB