Celldex Therapeutics (CLDX) Options Chain

NASDAQ: CLDXHealth CareBiotechnology: In Vitro & In Vivo Diagnostic SubstancesUSD

29.89+0.59 (+2.01%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Dec 18, 2026
Days to expiration: 69
Share price: $29.89
Put/call ratio (OI): 1.52
Put/call ratio (volume): 0.98
ATM implied volatility: 61.1%
Expected move: ±$7.94
Open interest (C / P): 2.00K / 3.04K

CLDX options summary

The CLDX options chain for the December 18, 2026 expiration lists 28 call and 25 put contracts, with 69 days until expiration. Open interest stands at 1,996 calls and 3,038 puts, a put/call ratio of 1.52, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $30.00 strike is 61.1%, which implies the market expects a move of about ±$7.94 (26.5%) in Celldex Therapeutics stock by expiration.

The most open interest sits at the $35.00 call (682 contracts) and the $27.00 put (2.16K contracts).

Summary generated from market data by MetaCap's automated system. Methodology

CLDX options chain · December 18, 2026

CLDX calls and puts by strike price. Shaded cells are in the money.
Calls							Puts
OI	Vol	IV	Last	Bid	Ask	Strike	Bid	Ask	Last	IV	Vol	OI
35	10	73.4%	19.72	14.70	19.10	13.00	0.00	1.60	0.90	163.6%	1	17
—	—	—	—	—	—	15.00	0.00	1.60	1.20	139.8%	1	15
—	—	—	—	—	—	16.00	0.00	1.75	1.30	132.9%	1	9
—	—	—	—	—	—	17.00	0.00	0.00	1.05	25.0%	1	0
—	—	—	—	—	—	18.00	0.00	1.50	1.80	107.4%	1	7
—	—	—	—	—	—	19.00	0.00	0.00	1.40	25.0%	1	0
26	5	66.3%	23.48	8.00	12.30	20.00	0.00	0.00	1.75	25.0%	2	0
—	—	—	—	—	—	21.00	0.00	1.65	0.45	84.8%	1	1
9	10	65.0%	10.40	6.10	10.70	22.00	0.00	2.50	0.65	90.7%	1	6
1	2	65.2%	16.85	5.50	9.70	23.00	0.00	2.65	0.85	84.3%	—	1
—	—	—	—	—	—	24.00	0.00	0.00	3.30	12.5%	1	0
0	1	—	17.00	0.00	0.00	25.00	0.45	2.05	1.45	65.5%	2	24
21	21	377.5%	14.70	16.00	20.40	27.00	0.25	2.70	1.45	54.4%	1	2,164
—	—	—	—	—	—	28.00	1.20	3.10	1.75	60.0%	—	1
1	—	246.2%	15.71	10.20	14.70	29.00	—	—	—	—	—	—
CLDX $29.89
9	1	64.3%	2.95	2.65	3.90	30.00	2.10	4.00	2.72	57.8%	1	15
14	1	64.1%	3.60	1.55	3.40	32.00	3.30	5.60	4.25	61.5%	15	539
6	2	201.3%	12.80	6.80	11.50	33.00	0.00	0.00	6.50	—	—	0
10	—	64.5%	3.00	1.25	2.50	34.00	4.60	6.20	5.50	52.4%	1	5
682	1	65.7%	1.75	1.25	2.10	35.00	4.50	8.50	6.60	59.7%	10	35
19	14	196.8%	13.65	5.70	10.50	36.00	—	—	—	—	—	—
73	2	66.4%	2.00	0.45	2.10	37.00	6.30	10.50	7.05	66.8%	1	12
172	2	68.8%	1.36	0.00	2.40	38.00	12.60	17.30	16.20	182.1%	—	8
15	7	67.8%	2.18	0.20	1.80	39.00	—	—	—	—	—	—
70	1	76.6%	1.60	0.05	2.35	40.00	8.90	13.00	10.10	67.2%	2	24
619	6	68.8%	1.40	0.00	1.55	41.00	10.20	13.90	11.30	73.4%	94	135
7	1	85.5%	2.00	0.00	2.55	42.00	15.50	19.60	18.90	172.2%	7	15
6	2	88.2%	1.65	0.00	2.50	43.00	—	—	—	—	—	—
0	—	25.0%	12.28	0.00	0.00	44.00	—	—	—	—	—	—
72	55	93.8%	0.65	0.00	2.45	45.00	17.60	21.90	21.00	167.8%	—	5
1	—	101.8%	1.30	0.00	2.40	48.00	—	—	—	—	—	—
1	—	89.1%	1.10	0.00	1.40	49.00	—	—	—	—	—	—
4	1	106.3%	1.05	0.00	2.35	50.00	—	—	—	—	—	—
18	1	119.0%	0.75	0.00	2.40	55.00	—	—	—	—	—	—
101	1	111.3%	0.45	0.00	1.35	60.00	—	—	—	—	—	—
4	1	120.0%	0.36	0.00	1.35	65.00	—	—	—	—	—	—

In-the-money callsIn-the-money puts. IV = implied volatility, OI = open interest (contracts). Each contract covers 100 shares. Quotes delayed at least 15 minutes.

Frequently asked questions

What is the CLDX put/call ratio?

For the December 18, 2026 expiration, the CLDX put/call ratio based on open interest is 1.52 (3,038 puts vs 1,996 calls), and 0.98 based on today's volume. A ratio above 1 means more puts than calls.

What is CLDX's implied volatility?

At-the-money implied volatility for CLDX options expiring December 18, 2026 is about 61.1%, an annualized estimate of how much the market expects Celldex Therapeutics stock to move.

How many CLDX option expiration dates are there?

CLDX has 8 listed expiration dates, from Oct 16, 2026 to Dec 17, 2027.

What does "in the money" mean?

A call is in the money when the strike price is below the current share price; a put is in the money when the strike is above it. In-the-money contracts have intrinsic value and are shaded in the table.