CSTM · Constellium SE · Options Chain

Track CSTM — free

$27.20 -0.28 (-1.02%) At close · Sep 9

Russell 2000 member Rebalance outlook locked

Market Cap

$3.74B

136.15M

Options Chain

Underlying $27.20 · today Options Calculator

Pull option chains with greeks and open interest through the options chain API or MCP →

Positioning

Sep 18, 2026 · 8 days to expiry · 40 contracts · mixed daily-bar sessions · Jul 21, 2026–Sep 9, 2026; 13 unknown

Put / call OI

0.26

Call-heavy positioning

Open interest

3,652

as of Sep 4, 2026

Volume

—

dated and unknown daily-bar sessions

Max pain

$28.00

$0.80 above spot

ATM implied vol

43.1%

market's expected move

Open interest by strike

Calls Puts

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Sep 18 8d Oct 16 36d Nov 20 71d Jan 15 127d Feb 19 162d

Calls								Puts
OI	Vol	IV	Δ	Bid	Ask	Last	Strike	Last	Bid	Ask	Δ	IV	Vol	OI
—	—	—	—	$7.70	$9.40	—		—	$0.00	$1.00	—	—	—	—
Call · $19 In the money Daily-bar session Unknown Quote as of 2026-09-09 19:59:10.794 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $19 Daily-bar session Unknown Quote as of 2026-09-09 19:59:59.950 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
2	2	—	—	$5.90	$9.00	$9.65		$0.30	$0.00	$0.75	—	—	18	3
Call · $20 In the money Daily-bar session Aug 14, 2026 Quote as of 2026-09-09 19:55:06.778 UTC Last $9.65 Breakeven $29.65 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 4, 2026 Model this call Put · $20 Daily-bar session Jul 21, 2026 Quote as of 2026-09-09 19:59:59.879 UTC Last $0.30 Breakeven $19.70 Implied vol — Delta — Gamma — Theta — Vega — Open interest 3 OI effective date Sep 4, 2026 Model this put
—	—	—	—	$5.70	$7.40	—		$0.35	$0.00	$0.75	—	—	2	4
Call · $21 In the money Daily-bar session Unknown Quote as of 2026-09-09 19:55:07.160 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $21 Daily-bar session Jul 27, 2026 Quote as of 2026-09-09 19:59:59.796 UTC Last $0.35 Breakeven $20.65 Implied vol — Delta — Gamma — Theta — Vega — Open interest 4 OI effective date Sep 4, 2026 Model this put
—	—	95.9%	0.932	$4.20	$6.50	—		$0.25	$0.00	$0.75	—	—	2	16
Call · $22 In the money Daily-bar session Unknown Quote as of 2026-09-09 19:59:59.652 UTC Last — Breakeven — Implied vol 95.9% Delta 0.932 ≈93% ITM Gamma 0.032 Theta -0.032 Vega 0.006 Open interest — OI effective date — Model this call Put · $22 Daily-bar session Aug 5, 2026 Quote as of 2026-09-09 19:59:59.943 UTC Last $0.25 Breakeven $21.75 Implied vol — Delta — Gamma — Theta — Vega — Open interest 16 OI effective date Sep 4, 2026 Model this put
—	—	110.4%	0.855	$3.70	$5.50	—		$0.10	$0.00	$0.75	—	—	1	12
Call · $23 In the money Daily-bar session Unknown Quote as of 2026-09-09 19:59:59.714 UTC Last — Breakeven — Implied vol 110.4% Delta 0.855 ≈86% ITM Gamma 0.048 Theta -0.062 Vega 0.01 Open interest — OI effective date — Model this call Put · $23 Daily-bar session Sep 8, 2026 Quote as of 2026-09-09 19:59:59.921 UTC Last $0.10 Breakeven $22.90 Implied vol — Delta — Gamma — Theta — Vega — Open interest 12 OI effective date Sep 4, 2026 Model this put
—	—	102.1%	0.807	$2.95	$4.50	—		$0.25	$0.00	$0.95	—	—	5	28
Call · $24 In the money Daily-bar session Unknown Quote as of 2026-09-09 19:59:59.679 UTC Last — Breakeven — Implied vol 102.1% Delta 0.807 ≈81% ITM Gamma 0.063 Theta -0.068 Vega 0.012 Open interest — OI effective date — Model this call Put · $24 Daily-bar session Aug 26, 2026 Quote as of 2026-09-09 19:59:59.825 UTC Last $0.25 Breakeven $23.75 Implied vol — Delta — Gamma — Theta — Vega — Open interest 28 OI effective date Sep 4, 2026 Model this put
11	1	94.4%	0.742	$2.10	$3.70	$1.80		$0.20	$0.20	$0.75	-0.228	79.3%	1	111
Call · $25 In the money Daily-bar session Aug 31, 2026 Quote as of 2026-09-09 19:59:59.675 UTC Last $1.80 Breakeven $26.80 Implied vol 94.4% Delta 0.742 ≈74% ITM Gamma 0.08 Theta -0.074 Vega 0.014 Open interest 11 OI effective date Sep 4, 2026 Model this call Put · $25 Daily-bar session Sep 9, 2026 Quote as of 2026-09-09 19:59:59.939 UTC Last $0.20 Breakeven $24.80 Implied vol 79.3% Delta -0.228 ≈23% ITM Gamma 0.089 Theta -0.056 Vega 0.013 Open interest 111 OI effective date Sep 4, 2026 Model this put
6	1	73.1%	0.677	$1.30	$2.55	$1.65		$0.46	$0.25	$0.60	-0.281	54.6%	4	38
Call · $26 In the money Daily-bar session Sep 4, 2026 Quote as of 2026-09-09 19:59:59.835 UTC Last $1.65 Breakeven $27.65 Implied vol 73.1% Delta 0.677 ≈68% ITM Gamma 0.115 Theta -0.064 Vega 0.015 Open interest 6 OI effective date Sep 4, 2026 Model this call Put · $26 Daily-bar session Sep 9, 2026 Quote as of 2026-09-09 19:59:59.970 UTC Last $0.46 Breakeven $25.54 Implied vol 54.6% Delta -0.281 ≈28% ITM Gamma 0.145 Theta -0.043 Vega 0.014 Open interest 38 OI effective date Sep 4, 2026 Model this put
130	10	50.6%	0.557	$0.80	$1.15	$0.85		$0.80	$0.15	$0.85	-0.43	35.7%	4	94
Call · $27 In the money Daily-bar session Sep 9, 2026 Quote as of 2026-09-09 19:59:59.971 UTC Last $0.85 Breakeven $27.85 Implied vol 50.6% Delta 0.557 ≈56% ITM Gamma 0.183 Theta -0.049 Vega 0.017 Open interest 130 OI effective date Sep 4, 2026 Model this call Put · $27 Daily-bar session Sep 9, 2026 Quote as of 2026-09-09 19:59:59.686 UTC Last $0.80 Breakeven $26.20 Implied vol 35.7% Delta -0.43 ≈43% ITM Gamma 0.258 Theta -0.032 Vega 0.017 Open interest 94 OI effective date Sep 4, 2026 Model this put
Underlying $27.20
697	12	41.8%	0.346	$0.30	$0.50	$0.40		$1.40	$0.85	$1.55	-0.647	43.4%	4	368
Call · $28 Daily-bar session Sep 9, 2026 Quote as of 2026-09-09 19:59:59.700 UTC Last $0.40 Breakeven $28.40 Implied vol 41.8% Delta 0.346 ≈35% ITM Gamma 0.207 Theta -0.038 Vega 0.016 Open interest 697 OI effective date Sep 4, 2026 Model this call Put · $28 In the money Daily-bar session Sep 9, 2026 Quote as of 2026-09-09 19:59:59.824 UTC Last $1.40 Breakeven $26.60 Implied vol 43.4% Delta -0.647 ≈65% ITM Gamma 0.2 Theta -0.036 Vega 0.016 Open interest 368 OI effective date Sep 4, 2026 Model this put
817	72	52.9%	0.236	$0.20	$0.40	$0.35		$2.20	$1.05	$2.40	—	—	2	52
Call · $29 Daily-bar session Sep 8, 2026 Quote as of 2026-09-09 19:59:59.737 UTC Last $0.35 Breakeven $29.35 Implied vol 52.9% Delta 0.236 ≈24% ITM Gamma 0.136 Theta -0.039 Vega 0.013 Open interest 817 OI effective date Sep 4, 2026 Model this call Put · $29 In the money Daily-bar session Sep 9, 2026 Quote as of 2026-09-09 19:59:59.839 UTC Last $2.20 Breakeven $26.80 Implied vol — Delta — Gamma — Theta — Vega — Open interest 52 OI effective date Sep 4, 2026 Model this put
298	1	—	—	$0.00	$0.35	$0.15		$3.81	$2.40	$3.40	-0.878	51.3%	1	28
Call · $30 Daily-bar session Sep 9, 2026 Quote as of 2026-09-09 19:59:59.818 UTC Last $0.15 Breakeven $30.15 Implied vol — Delta — Gamma — Theta — Vega — Open interest 298 OI effective date Sep 4, 2026 Model this call Put · $30 In the money Daily-bar session Aug 20, 2026 Quote as of 2026-09-09 19:59:59.764 UTC Last $3.81 Breakeven $26.19 Implied vol 51.3% Delta -0.878 ≈88% ITM Gamma 0.092 Theta -0.022 Vega 0.009 Open interest 28 OI effective date Sep 4, 2026 Model this put
447	1	—	—	$0.00	$0.20	$0.08		$3.47	$2.75	$5.00	-0.91	59.7%	3	4
Call · $31 Daily-bar session Sep 3, 2026 Quote as of 2026-09-09 19:59:59.813 UTC Last $0.08 Breakeven $31.08 Implied vol — Delta — Gamma — Theta — Vega — Open interest 447 OI effective date Sep 4, 2026 Model this call Put · $31 In the money Daily-bar session Jul 24, 2026 Quote as of 2026-09-09 19:59:59.653 UTC Last $3.47 Breakeven $27.53 Implied vol 59.7% Delta -0.91 ≈91% ITM Gamma 0.064 Theta -0.02 Vega 0.007 Open interest 4 OI effective date Sep 4, 2026 Model this put
140	7	—	—	$0.00	$0.50	$0.10		$5.54	$2.95	$5.40	—	—	15	—
Call · $32 Daily-bar session Aug 31, 2026 Quote as of 2026-09-09 19:59:59.942 UTC Last $0.10 Breakeven $32.10 Implied vol — Delta — Gamma — Theta — Vega — Open interest 140 OI effective date Sep 4, 2026 Model this call Put · $32 In the money Daily-bar session Aug 25, 2026 Quote as of 2026-09-09 19:59:59.653 UTC Last $5.54 Breakeven $26.46 Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
196	11	—	—	$0.00	$1.20	$0.05		—	$4.60	$6.90	—	—	—	—
Call · $33 Daily-bar session Sep 8, 2026 Quote as of 2026-09-09 19:59:59.944 UTC Last $0.05 Breakeven $33.05 Implied vol — Delta — Gamma — Theta — Vega — Open interest 196 OI effective date Sep 4, 2026 Model this call Put · $33 In the money Daily-bar session Unknown Quote as of 2026-09-09 19:59:59.652 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
14	1	—	—	$0.00	$0.75	$0.04		—	$5.40	$7.30	—	—	—	—
Call · $34 Daily-bar session Aug 26, 2026 Quote as of 2026-09-09 19:59:59.945 UTC Last $0.04 Breakeven $34.04 Implied vol — Delta — Gamma — Theta — Vega — Open interest 14 OI effective date Sep 4, 2026 Model this call Put · $34 In the money Daily-bar session Unknown Quote as of 2026-09-09 19:55:08.608 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
101	3	—	—	$0.00	$0.20	$0.05		—	$6.60	$8.30	—	—	—	—
Call · $35 Daily-bar session Aug 25, 2026 Quote as of 2026-09-09 19:59:59.958 UTC Last $0.05 Breakeven $35.05 Implied vol — Delta — Gamma — Theta — Vega — Open interest 101 OI effective date Sep 4, 2026 Model this call Put · $35 In the money Daily-bar session Unknown Quote as of 2026-09-09 19:55:02.203 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
10	6	—	—	$0.00	$0.10	$0.76		—	$7.70	$9.30	—	—	—	—
Call · $36 Daily-bar session Jul 28, 2026 Quote as of 2026-09-09 13:30:20.800 UTC Last $0.76 Breakeven $36.76 Implied vol — Delta — Gamma — Theta — Vega — Open interest 10 OI effective date Sep 4, 2026 Model this call Put · $36 In the money Daily-bar session Unknown Quote as of 2026-09-09 19:55:03.326 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
25	4	—	—	$0.00	$0.75	$0.02		—	$8.00	$11.20	—	—	—	—
Call · $37 Daily-bar session Aug 25, 2026 Quote as of 2026-09-09 19:59:59.680 UTC Last $0.02 Breakeven $37.02 Implied vol — Delta — Gamma — Theta — Vega — Open interest 25 OI effective date Sep 4, 2026 Model this call Put · $37 In the money Daily-bar session Unknown Quote as of 2026-09-09 19:55:02.203 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.95	—		—	$11.10	$13.50	—	—	—	—
Call · $40 Daily-bar session Unknown Quote as of 2026-09-09 19:57:41.238 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $40 In the money Daily-bar session Unknown Quote as of 2026-09-09 19:57:37.708 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put

About this data

Each contract's last price, day range and volume belong to the daily-bar session shown in its details; unknown means the source omitted that timestamp. Open interest has its own effective date shown separately; implied volatility and greeks are model values computed when fetched. This chain has mixed daily-bar sessions · Jul 21, 2026–Sep 9, 2026; 13 unknown. Positioning totals are shown only when every returned open-interest value has the same known effective date. Bid and ask are real-time consolidated OPRA readings.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.

Key facts CIK 1563411 CUSIP F21107101 13F (30d) 228 filings 228 filers Visit website Investor relations