Celldex Therapeutics (CLDX) Options Chain

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

29.30-1.13 (-3.71%)

At close: Oct 8, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Oct 16, 2026
Days to expiration: 8
Share price: $29.30
Put/call ratio (OI): 0.96
Put/call ratio (volume): 2.61
ATM implied volatility: 63.5%
Expected move: ±$2.76
Open interest (C / P): 6.51K / 6.27K

CLDX options summary

The CLDX options chain for the October 16, 2026 expiration lists 33 call and 26 put contracts, with 8 days until expiration. Open interest stands at 6,506 calls and 6,272 puts, a put/call ratio of 0.96, which is fairly balanced between calls and puts. At-the-money implied volatility near the $29.00 strike is 63.5%, which implies the market expects a move of about ±$2.76 (9.4%) in Celldex Therapeutics stock by expiration.

The most open interest sits at the $40.00 call (3.79K contracts) and the $38.00 put (1.90K contracts).

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

CLDX options chain · October 16, 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
2	4	1073.2%	17.00	18.50	22.90	15.00	0.00	1.20	0.09	369.9%	122	130
0	6	—	12.00	0.00	0.00	20.00	0.00	1.15	0.15	235.0%	7	97
0	—	—	22.50	0.00	0.00	21.00	0.00	1.15	0.15	212.3%	23	120
2	—	155.9%	17.42	5.20	10.00	22.00	0.00	1.15	0.69	190.4%	1	8
—	—	—	—	—	—	23.00	0.00	1.15	1.64	169.3%	3	10
—	—	—	—	—	—	24.00	0.00	0.75	0.15	127.7%	11	13
0	—	—	16.70	0.00	0.00	25.00	0.00	0.75	0.32	109.0%	16	1,424
1	2	671.5%	10.07	10.00	14.50	26.00	0.00	0.75	0.25	90.4%	2	6
0	—	—	15.50	0.00	0.00	27.00	0.00	0.60	0.30	65.2%	101	219
11	2	76.8%	14.18	0.85	2.05	28.00	0.00	0.65	0.50	70.3%	3	46
2	1	63.5%	2.64	0.35	1.25	29.00	0.10	0.95	0.39	63.6%	10	52
CLDX $29.30
29	2	57.8%	0.75	0.40	1.00	30.00	0.80	1.75	0.95	50.4%	10	524
21	6	63.3%	1.40	0.00	0.95	31.00	0.05	2.95	0.80	111.6%	2	31
37	3	113.3%	0.65	0.00	1.95	32.00	0.60	4.90	1.01	187.4%	30	76
68	2	86.1%	0.95	0.00	0.75	33.00	2.00	5.50	2.05	181.6%	25	149
76	4	99.0%	0.35	0.00	0.75	34.00	3.40	6.40	5.72	81.6%	16	17
106	1	98.4%	0.07	0.00	0.50	35.00	5.20	7.00	6.00	113.5%	2	977
44	12	122.5%	4.40	0.00	0.75	36.00	5.00	8.00	4.50	194.9%	16	12
3	13	152.2%	2.50	0.00	1.15	37.00	5.60	9.40	4.50	234.7%	7	428
29	38	171.9%	0.99	0.00	1.35	38.00	6.60	10.40	5.70	247.4%	77	1,901
120	1	152.9%	0.20	0.00	0.75	39.00	7.80	11.20	8.80	245.7%	1	10
3,792	20	96.1%	0.05	0.00	0.05	40.00	8.80	12.20	9.00	257.0%	1	22
18	1	171.1%	1.06	0.00	0.75	41.00	—	—	—	—	—	—
75	3	211.3%	0.22	0.00	1.35	42.00	0.00	0.00	9.75	—	—	0
20	1	220.3%	7.30	0.00	1.35	43.00	—	—	—	—	—	—
2	1	228.7%	6.96	0.00	1.35	44.00	—	—	—	—	—	—
1,739	26	237.1%	0.05	0.00	1.35	45.00	—	—	—	—	—	—
3	1	648.5%	2.75	4.50	9.30	46.00	—	—	—	—	—	—
11	1	242.0%	5.50	0.00	1.15	47.00	—	—	—	—	—	—
22	2	249.2%	0.50	0.00	1.15	48.00	16.00	20.80	12.70	376.2%	20	0
0	1	50.0%	5.70	0.00	0.00	49.00	0.00	0.00	12.70	—	—	0
175	1	274.4%	0.15	0.00	1.35	50.00	18.40	23.00	14.10	50.0%	3	0
26	10	454.4%	3.13	0.00	4.90	55.00	—	—	—	—	—	—
60	24	487.4%	0.20	0.00	4.90	60.00	—	—	—	—	—	—
12	6	516.7%	0.05	0.00	4.90	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 October 16, 2026 expiration, the CLDX put/call ratio based on open interest is 0.96 (6,272 puts vs 6,506 calls), and 2.61 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 October 16, 2026 is about 63.5%, 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.