# Biggest options open interest changes

OI settled 2026-09-22 vs 2026-09-21.

> Open interest change, not trades; it does not say which side opened or closed.

Source: SquawkFlow's own nightly archive of Cboe settled open interest. Updates once per session. Figures are contracts, not dollars: the archive holds no option prices.

122 of 212 archived US symbols compared. The other 90 lacked a consecutive settlement pair in the archive for these two sessions. 105 of those compared reported an identical book in both sessions.

Across the compared symbols: 1,410 contracts changed open interest, +29,328 added, -1,873 removed, net +27,455 contracts.

## Largest open interest increases (contracts)

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| HAL | 2026-10-16 | 40 | call | 22,193 | 26,035 | +3,842 |
| USB | 2026-12-18 | 62.5 | call | 2,554 | 5,163 | +2,609 |
| HBAN | 2026-10-16 | 17 | call | 6,363 | 7,564 | +1,201 |
| HBAN | 2026-10-16 | 16 | call | 363 | 1,180 | +817 |
| HAL | 2026-10-16 | 35 | call | 1,818 | 2,405 | +587 |
| BILL | 2026-10-02 | 53 | call | 3 | 575 | +572 |
| TFC | 2026-10-16 | 50 | call | 1,056 | 1,622 | +566 |
| HAL | 2026-09-25 | 34.5 | call | 56 | 608 | +552 |
| USB | 2026-10-16 | 62 | call | 0 | 499 | +499 |
| CME | 2026-09-25 | 280 | call | 46 | 412 | +366 |
| CME | 2026-09-25 | 272.5 | put | 9 | 357 | +348 |
| USB | 2026-10-16 | 60 | call | 495 | 809 | +314 |
| ADP | 2026-11-20 | 240 | put | 451 | 752 | +301 |
| TFC | 2026-10-16 | 52.5 | call | 3,912 | 4,209 | +297 |
| USB | 2026-11-20 | 60 | call | 63 | 353 | +290 |
| TFC | 2027-06-17 | 55 | call | 1,095 | 1,357 | +262 |
| ILMN | 2026-10-16 | 230 | put | 46 | 307 | +261 |
| CFG | 2026-10-16 | 70 | call | 214 | 460 | +246 |
| USB | 2026-11-20 | 67.5 | call | 510 | 745 | +235 |
| CFG | 2026-10-16 | 67.5 | call | 182 | 388 | +206 |

## Largest open interest decreases (contracts)

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| USB | 2027-01-15 | 70 | call | 4,225 | 4,095 | -130 |
| USB | 2026-11-20 | 70 | call | 1,052 | 951 | -101 |
| HAL | 2026-09-25 | 37 | put | 157 | 69 | -88 |
| HAL | 2027-01-15 | 30 | put | 2,797 | 2,720 | -77 |
| USB | 2026-10-02 | 65 | call | 124 | 54 | -70 |
| GD | 2027-01-15 | 350 | put | 882 | 818 | -64 |
| HAL | 2026-12-18 | 20 | call | 355 | 293 | -62 |
| USB | 2027-02-19 | 70 | call | 456 | 397 | -59 |
| HAL | 2027-01-15 | 32 | put | 2,359 | 2,304 | -55 |
| HAL | 2026-09-25 | 38 | put | 181 | 130 | -51 |
| CME | 2026-12-18 | 450 | call | 150 | 100 | -50 |
| XLRE | 2027-01-15 | 51 | put | 34 | 1 | -33 |
| HAL | 2026-10-02 | 37 | call | 108 | 77 | -31 |
| HAL | 2027-01-15 | 32 | call | 9,723 | 9,693 | -30 |
| TFC | 2026-11-20 | 55 | call | 1,061 | 1,034 | -27 |
| XLRE | 2026-11-20 | 48 | put | 31 | 4 | -27 |
| HAL | 2027-03-19 | 45 | call | 708 | 683 | -25 |
| USB | 2026-09-25 | 63 | put | 55 | 30 | -25 |
| USB | 2026-12-18 | 60 | call | 2,969 | 2,945 | -24 |
| GPN | 2027-01-15 | 90 | call | 483 | 460 | -23 |

## Index ETFs (SPY, QQQ, IWM, DIA)

Increases:

None in this pair.

Decreases:

None in this pair.

## Single stocks

Increases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| HAL | 2026-10-16 | 40 | call | 22,193 | 26,035 | +3,842 |
| USB | 2026-12-18 | 62.5 | call | 2,554 | 5,163 | +2,609 |
| HBAN | 2026-10-16 | 17 | call | 6,363 | 7,564 | +1,201 |
| HBAN | 2026-10-16 | 16 | call | 363 | 1,180 | +817 |
| HAL | 2026-10-16 | 35 | call | 1,818 | 2,405 | +587 |
| BILL | 2026-10-02 | 53 | call | 3 | 575 | +572 |
| TFC | 2026-10-16 | 50 | call | 1,056 | 1,622 | +566 |
| HAL | 2026-09-25 | 34.5 | call | 56 | 608 | +552 |
| USB | 2026-10-16 | 62 | call | 0 | 499 | +499 |
| CME | 2026-09-25 | 280 | call | 46 | 412 | +366 |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change |
|---|---|---|---|---|---|---|
| USB | 2027-01-15 | 70 | call | 4,225 | 4,095 | -130 |
| USB | 2026-11-20 | 70 | call | 1,052 | 951 | -101 |
| HAL | 2026-09-25 | 37 | put | 157 | 69 | -88 |
| HAL | 2027-01-15 | 30 | put | 2,797 | 2,720 | -77 |
| USB | 2026-10-02 | 65 | call | 124 | 54 | -70 |
| GD | 2027-01-15 | 350 | put | 882 | 818 | -64 |
| HAL | 2026-12-18 | 20 | call | 355 | 293 | -62 |
| USB | 2027-02-19 | 70 | call | 456 | 397 | -59 |
| HAL | 2027-01-15 | 32 | put | 2,359 | 2,304 | -55 |
| HAL | 2026-09-25 | 38 | put | 181 | 130 | -51 |

## Calls vs puts

| Type | Added | Removed | Net |
|---|---|---|---|
| Calls | +22,867 | -1,085 | +21,782 |
| Puts | +6,461 | -788 | +5,673 |

## Biggest percent changes

Percent changes only for contracts with at least 1,000 prior open interest.

Increases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change | Change % |
|---|---|---|---|---|---|---|---|
| USB | 2026-12-18 | 62.5 | call | 2,554 | 5,163 | +2,609 | +102.2% |
| TFC | 2026-10-16 | 50 | call | 1,056 | 1,622 | +566 | +53.6% |
| HAL | 2026-10-16 | 35 | call | 1,818 | 2,405 | +587 | +32.3% |
| TFC | 2027-06-17 | 55 | call | 1,095 | 1,357 | +262 | +23.9% |
| HBAN | 2026-10-16 | 17 | call | 6,363 | 7,564 | +1,201 | +18.9% |
| HAL | 2026-10-16 | 40 | call | 22,193 | 26,035 | +3,842 | +17.3% |
| USB | 2026-10-16 | 62.5 | call | 1,205 | 1,402 | +197 | +16.3% |
| TFC | 2026-10-16 | 52.5 | call | 3,912 | 4,209 | +297 | +7.6% |
| HBAN | 2026-11-20 | 17 | call | 1,209 | 1,284 | +75 | +6.2% |
| HAL | 2026-10-16 | 38 | call | 2,059 | 2,178 | +119 | +5.8% |
| TFC | 2026-12-18 | 52.5 | call | 1,246 | 1,314 | +68 | +5.5% |
| CFG | 2026-10-16 | 72.5 | call | 2,285 | 2,395 | +110 | +4.8% |
| HAL | 2026-12-18 | 60 | call | 2,080 | 2,175 | +95 | +4.6% |
| USB | 2026-10-16 | 60 | put | 2,675 | 2,781 | +106 | +4% |
| TFC | 2027-01-15 | 52.5 | call | 2,315 | 2,394 | +79 | +3.4% |
| HAL | 2026-10-16 | 37 | call | 1,719 | 1,775 | +56 | +3.3% |
| XLRE | 2027-01-15 | 45 | call | 1,315 | 1,357 | +42 | +3.2% |
| TFC | 2026-12-18 | 55 | call | 3,059 | 3,151 | +92 | +3% |
| ICE | 2026-09-25 | 165 | call | 1,024 | 1,052 | +28 | +2.7% |
| USB | 2026-11-20 | 65 | call | 1,717 | 1,762 | +45 | +2.6% |

Decreases:

| Symbol | Expiry | Strike | Type | Prior OI | Current OI | Change | Change % |
|---|---|---|---|---|---|---|---|
| USB | 2026-11-20 | 70 | call | 1,052 | 951 | -101 | -9.6% |
| USB | 2027-01-15 | 70 | call | 4,225 | 4,095 | -130 | -3.1% |
| HAL | 2027-01-15 | 30 | put | 2,797 | 2,720 | -77 | -2.8% |
| TFC | 2026-11-20 | 55 | call | 1,061 | 1,034 | -27 | -2.5% |
| HAL | 2027-01-15 | 32 | put | 2,359 | 2,304 | -55 | -2.3% |
| HAL | 2027-03-19 | 42 | call | 1,246 | 1,226 | -20 | -1.6% |
| USB | 2027-01-15 | 45 | call | 1,333 | 1,315 | -18 | -1.4% |
| CME | 2026-10-16 | 310 | call | 1,139 | 1,124 | -15 | -1.3% |
| USB | 2026-12-18 | 60 | call | 2,969 | 2,945 | -24 | -0.8% |
| HAL | 2027-01-15 | 50 | call | 1,123 | 1,114 | -9 | -0.8% |
| CBOE | 2027-01-15 | 330 | call | 1,666 | 1,654 | -12 | -0.7% |
| TFC | 2026-12-18 | 60 | call | 1,309 | 1,303 | -6 | -0.5% |
| HAL | 2027-01-15 | 40 | call | 5,440 | 5,418 | -22 | -0.4% |
| HAL | 2026-10-16 | 32 | call | 2,673 | 2,663 | -10 | -0.4% |
| HAL | 2026-10-16 | 39 | call | 1,153 | 1,148 | -5 | -0.4% |
| HAL | 2027-01-15 | 32 | call | 9,723 | 9,693 | -30 | -0.3% |
| HAL | 2026-10-16 | 35 | put | 1,156 | 1,153 | -3 | -0.3% |
| USB | 2026-12-18 | 55 | call | 1,003 | 1,000 | -3 | -0.3% |
| CFG | 2027-01-15 | 45 | call | 1,428 | 1,425 | -3 | -0.2% |
| HBAN | 2027-01-15 | 15 | put | 1,739 | 1,736 | -3 | -0.2% |

## Top strikes, summed across expirations

| Symbol | Strike | Type | Change | Expirations summed |
|---|---|---|---|---|
| HAL | 40 | call | +3,951 | 10 |
| USB | 62.5 | call | +2,917 | 6 |
| HBAN | 17 | call | +1,289 | 6 |
| HBAN | 16 | call | +848 | 3 |
| HAL | 35 | call | +808 | 11 |
| TFC | 50 | call | +628 | 5 |
| USB | 60 | call | +586 | 8 |
| HAL | 34.5 | call | +578 | 3 |
| BILL | 53 | call | +572 | 1 |
| USB | 62 | call | +550 | 4 |
| TFC | 52.5 | call | +521 | 6 |
| TFC | 55 | call | +415 | 6 |
| USB | 67.5 | call | +397 | 7 |
| CME | 280 | call | +374 | 7 |
| CME | 272.5 | put | +347 | 2 |
| ICE | 165 | call | +310 | 7 |
| CFG | 70 | call | +305 | 2 |
| ADP | 240 | put | +297 | 3 |
| ILMN | 230 | put | +277 | 3 |
| HAL | 36.5 | call | +261 | 3 |

## Symbols by net change

Largest net increases:

| Symbol | Net change | Calls | Puts |
|---|---|---|---|
| HAL | +7,910 | +7,034 | +876 |
| USB | +5,289 | +5,027 | +262 |
| HBAN | +2,460 | +2,163 | +297 |
| TFC | +2,008 | +1,759 | +249 |
| CME | +1,555 | +930 | +625 |
| BILL | +1,346 | +912 | +434 |
| ADP | +1,116 | +570 | +546 |
| ICE | +924 | +548 | +376 |
| CFG | +879 | +700 | +179 |
| BIIB | +716 | +579 | +137 |

Largest net decreases:

None in this pair.

## Archive

- https://squawkflow.com/oi-changes/2026-10-08.md (2026-10-08 vs 2026-10-07, 158 symbols)
- https://squawkflow.com/oi-changes/2026-10-07.md (2026-10-07 vs 2026-10-06, 135 symbols)
- https://squawkflow.com/oi-changes/2026-10-06.md (2026-10-06 vs 2026-10-05, 136 symbols)
- https://squawkflow.com/oi-changes/2026-10-05.md (2026-10-05 vs 2026-10-02, 155 symbols)
- https://squawkflow.com/oi-changes/2026-10-02.md (2026-10-02 vs 2026-10-01, 148 symbols)
- https://squawkflow.com/oi-changes/2026-10-01.md (2026-10-01 vs 2026-09-30, 156 symbols)
- https://squawkflow.com/oi-changes/2026-09-30.md (2026-09-30 vs 2026-09-29, 148 symbols)
- https://squawkflow.com/oi-changes/2026-09-29.md (2026-09-29 vs 2026-09-28, 150 symbols)
- https://squawkflow.com/oi-changes/2026-09-28.md (2026-09-28 vs 2026-09-25, 150 symbols)
- https://squawkflow.com/oi-changes/2026-09-25.md (2026-09-25 vs 2026-09-24, 135 symbols)

SPX open interest change by strike: https://squawkflow.com/oi-change.md

Canonical: https://squawkflow.com/oi-changes/2026-09-22