CSTM Open Interest
Constellium SE (CSTM) had 33.0K open option contracts as of Nov 4, 2026: 22.54K calls and 10.45K puts. Open interest rose 6.1% over the past four weeks, and is CSTM's highest level in 4 weeks. The put/call open interest ratio is 0.46, so calls outnumber puts.
Open Interest by Strike
Showing results for CSTM, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for CSTM, 2026-11-20(m), calls & puts
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| Put Open Interest Total | |
| Open Interest Total | |
| Put-Call Open Interest Ratio |
Highest Open Interest Options
Showing results for CSTM, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for CSTM, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for CSTM, all expirations, calls & puts. View full history
CSTM Open Interest FAQ
What is open interest?
Open interest is the number of option contracts that are open and not yet closed, exercised, or expired. The Options Clearing Corporation calculates it once a day from the previous day's trades, and it is published before the market opens.
How much open interest does CSTM have?
Constellium SE had 33.0K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 31.68K contracts.
Is CSTM open interest rising or falling?
Open interest rose 6.1% over the past four weeks, and is CSTM's highest level in 4 weeks. It was 31.11K contracts on Oct 7, 2026. See the CSTM open interest history for a longer view.
What is the CSTM put/call open interest ratio?
The Constellium SE put/call open interest ratio was 0.46 as of Nov 4, 2026. Four weeks earlier it was 0.42.
What is Constellium SE?
Constellium SE is engaged in the development, manufacture and sale of a broad range of high value-added specialty rolled and extruded aluminum products to the aerospace, space, defense, packaging, automotive, commercial transportation and general industrial end-markets.