Arm Holdings plc options tape
Read from CBOE's delayed chain on 26 September 2026, with Arm Holdings plc at $310.93: open interest within 90 days was 195,333 call and 194,762 put contracts, a put/call ratio of 1.0; the day's volume was 38,686 calls and 13,506 puts (0.35). The most call open interest sits at the $320.00 strike (25,367 contracts) and the most put open interest at $110.00 (14,627). The at-the-money straddle for 2 October 2026, 6 days out, was priced at 7.5% of spot. For 16 October 2026, implied volatility was 64.0% at the put 5% below spot and 69.7% at the call 5% above, -5.7 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $320.00 | 25,367 |
| Puts | $110.00 | 14,627 |
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 $322.50 | 2,018 | 163 | $1.5 million |
| 2 October 2026 call at $332.50 | 1,750 | 153 | $853,125 |
| 2 October 2026 put at $337.50 | 250 | 32 | $760,625 |
| 2 October 2026 put at $310.00 | 657 | 168 | $745,695 |
| 2 October 2026 put at $332.50 | 251 | 73 | $668,288 |
| 2 October 2026 put at $315.00 | 311 | 98 | $440,842 |
| 2 October 2026 put at $312.50 | 320 | 42 | $417,600 |
| 30 October 2026 put at $290.00 | 203 | 63 | $311,098 |
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 builds against the previous day appear from the second daily read of this name.
Source
CBOE delayed quotes for ARM, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
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