ON Semiconductor Corp. options tape
Read from CBOE's delayed chain on 23 September 2026, with ON Semiconductor Corp. at $73.70: open interest within 90 days was 82,962 call and 42,124 put contracts, a put/call ratio of 0.51; the day's volume was 22,290 calls and 3,977 puts (0.18). The most call open interest sits at the $80.00 strike (13,988 contracts) and the most put open interest at $65.00 (6,020). The at-the-money straddle for 25 September 2026, 2 days out, was priced at 4.2% of spot. For 16 October 2026, implied volatility was 55.6% at the put 5% below spot and 56.3% at the call 5% above, -0.7 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $80.00 | 13,988 |
| Puts | $65.00 | 6,020 |
The strike with the most open interest on each side, across expiries within 90 days.
Strikes where the day's volume was at least twice the open interest
| Contract | Volume | Open interest before | Premium traded |
|---|---|---|---|
| 2 October 2026 call at $75.00 | 4,660 | 667 | $997,240 |
| 16 October 2026 call at $76.00 | 1,233 | 2 | $377,915 |
| 16 October 2026 call at $77.00 | 545 | 0 | $158,050 |
| 16 October 2026 put at $63.00 | 1,531 | 11 | $110,232 |
Volume of at least 200 contracts and at least twice the open interest, with at least $25,000 of premium at the mid; contracts expiring the same day are left out. Premium is mid price times volume times 100.
Open interest built since 22 September 2026
| Contract | Open interest now | Change |
|---|---|---|
| 20 November 2026 call at $70.00 | 6,390 | +1,283 |
| 25 September 2026 put at $68.00 | 1,029 | +610 |
| 16 October 2026 call at $70.00 | 1,797 | +524 |
| 25 September 2026 call at $73.00 | 781 | +367 |
| 25 September 2026 put at $67.00 | 813 | +297 |
Contracts whose open interest rose by 250 or more against the previous day's snapshot.
Source
CBOE delayed quotes for ON, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
The same record on your computer
GreekSoup is also a free program for your own computer. It reads these same filings for the names you follow, refreshed as they land, with no account. One pasted line installs it.