argenx (ARGX) Options Chain

NASDAQ: ARGXHealth CareBiotechnology: Biological Products (No Diagnostic Substances)USD

825.03+6.40 (+0.78%)

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

Expiration date

Expiration: Nov 20, 2026
Days to expiration: 40
Share price: $825.03
Put/call ratio (OI): 1.17
Put/call ratio (volume): 5.45
ATM implied volatility: 39.6%
Expected move: ±$108.13
Open interest (C / P): 577 / 676

ARGX options summary

The ARGX options chain for the November 20, 2026 expiration lists 43 call and 43 put contracts, with 40 days until expiration. Open interest stands at 577 calls and 676 puts, a put/call ratio of 1.17, which is fairly balanced between calls and puts. At-the-money implied volatility near the $830.00 strike is 39.6%, which implies the market expects a move of about ±$108.13 (13.1%) in argenx stock by expiration.

The most open interest sits at the $940.00 call (75 contracts) and the $940.00 put (149 contracts).

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

ARGX options chain · November 20, 2026

ARGX 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
0	1	324.8%	479.20	542.90	551.00	340.00	—	—	—	—	—	—
—	—	—	—	—	—	350.00	0.00	8.70	0.50	147.4%	—	1
—	—	—	—	—	—	380.00	0.00	7.50	2.25	131.0%	—	7
—	—	—	—	—	—	390.00	0.00	7.60	2.66	127.4%	—	8
—	—	—	—	—	—	400.00	0.00	8.90	2.90	127.4%	30	12
—	—	—	—	—	—	450.00	0.00	4.30	0.20	95.4%	—	2
—	—	—	—	—	—	500.00	0.00	10.00	5.90	94.9%	30	12
1	—	212.9%	295.50	371.40	379.60	520.00	8.00	12.40	14.17	105.2%	—	1
—	—	—	—	—	—	540.00	0.00	0.00	9.23	25.0%	6	0
1	—	195.0%	263.60	328.40	337.00	570.00	0.00	8.80	8.00	71.7%	2	10
1	—	190.9%	255.30	319.40	328.00	580.00	—	—	—	—	—	—
1	1	230.1%	303.76	344.00	353.00	590.00	—	—	—	—	—	—
2	1	353.6%	267.00	436.40	445.00	600.00	4.00	13.10	10.95	74.9%	10	5
—	—	—	—	—	—	610.00	0.00	0.00	19.00	12.5%	—	0
1	1	337.7%	249.00	416.70	425.00	620.00	0.00	5.60	1.10	52.7%	1	1
—	—	—	—	—	—	630.00	0.00	5.90	1.00	50.8%	1	1
—	—	—	—	—	—	680.00	0.30	8.40	5.00	51.3%	6	7
2	—	79.8%	168.45	156.00	160.80	700.00	2.00	10.00	7.37	48.4%	82	90
—	—	—	—	—	—	710.00	3.00	11.40	8.59	47.7%	85	81
—	—	—	—	—	—	730.00	6.00	14.30	10.00	45.7%	1	9
1	—	48.7%	258.70	97.20	104.30	740.00	8.30	15.80	13.58	44.5%	22	2
1	—	47.9%	249.30	89.30	96.50	750.00	10.00	17.80	15.69	43.6%	21	20
—	—	—	—	—	—	760.00	0.00	0.00	32.70	6.3%	1	0
—	—	—	—	—	—	770.00	15.00	23.10	28.52	42.6%	1	3
—	—	—	—	—	—	780.00	0.00	0.00	35.00	3.1%	1	0
4	—	149.4%	162.60	173.50	182.00	790.00	—	—	—	—	—	—
17	2	44.6%	57.30	54.60	62.00	800.00	25.10	32.90	32.69	40.8%	3	4
1	2	43.6%	46.20	49.30	55.50	810.00	30.00	37.00	10.30	40.4%	—	1
ARGX $825.03
—	—	—	—	—	—	830.00	39.80	46.30	44.65	39.6%	2	10
6	3	43.2%	39.30	33.20	40.90	840.00	45.00	51.60	48.55	39.3%	1	12
7	7	43.0%	29.70	29.00	36.70	850.00	50.00	57.20	22.95	39.0%	21	54
0	1	3.1%	163.45	0.00	0.00	860.00	56.10	63.10	24.90	38.6%	2	21
—	—	—	—	—	—	870.00	62.00	70.90	22.17	39.6%	—	4
0	2	3.1%	168.80	0.00	0.00	880.00	69.00	78.00	25.60	39.8%	8	22
—	—	—	—	—	—	890.00	76.10	85.20	28.61	39.8%	—	1
38	14	39.7%	19.60	13.00	17.70	900.00	84.00	92.90	28.20	40.0%	50	29
—	—	—	—	—	—	910.00	92.00	100.90	35.10	40.3%	50	4
9	3	43.7%	15.35	8.80	16.90	920.00	100.50	107.70	49.00	38.8%	51	55
56	1	44.3%	10.35	7.10	15.40	930.00	—	—	—	—	—	—
75	2	44.8%	40.85	5.70	14.00	940.00	117.80	124.90	59.90	39.5%	50	149
68	2	45.1%	8.78	4.50	12.60	950.00	126.60	133.70	54.00	39.7%	—	1
16	4	45.7%	5.30	3.40	11.60	960.00	135.60	142.60	41.00	39.9%	15	16
31	1	47.1%	5.67	1.70	9.90	980.00	154.00	161.60	86.93	41.8%	1	4
1	1	47.8%	27.78	0.90	9.20	990.00	—	—	—	—	—	—
49	1	48.6%	25.27	0.40	8.60	1,000.00	172.90	180.40	175.00	42.8%	1	17
4	2	50.0%	39.90	0.00	7.50	1,020.00	—	—	—	—	—	—
2	1	51.6%	30.00	0.00	6.70	1,040.00	—	—	—	—	—	—
30	1	53.4%	23.05	0.00	6.10	1,060.00	230.90	240.00	230.00	51.0%	4	0
7	1	55.1%	15.32	0.00	5.60	1,080.00	250.80	260.00	252.80	53.8%	2	0
61	5	56.9%	6.60	0.00	5.20	1,100.00	—	—	—	—	—	—
34	—	51.3%	22.55	0.00	5.00	1,120.00	—	—	—	—	—	—
8	1	53.3%	9.70	0.00	4.80	1,140.00	—	—	—	—	—	—
5	—	100.1%	24.20	21.80	30.80	1,160.00	—	—	—	—	—	—
26	37	57.1%	30.86	0.00	4.50	1,180.00	—	—	—	—	—	—
3	2	59.2%	5.39	0.00	4.50	1,200.00	0.00	0.00	421.00	—	—	0
1	1	61.1%	0.30	0.00	4.40	1,220.00	—	—	—	—	—	—
3	—	90.8%	11.40	7.00	16.00	1,260.00	430.80	440.00	271.90	52.0%	—	0
1	—	68.7%	12.10	0.00	4.30	1,300.00	—	—	—	—	—	—
0	—	25.0%	3.40	0.00	0.00	1,340.00	—	—	—	—	—	—
0	1	25.0%	5.50	0.00	0.00	1,360.00	—	—	—	—	—	—
1	—	79.3%	3.30	0.00	4.30	1,420.00	—	—	—	—	—	—
2	1	82.5%	1.00	0.00	4.30	1,460.00	—	—	—	—	—	—

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 ARGX put/call ratio?

For the November 20, 2026 expiration, the ARGX put/call ratio based on open interest is 1.17 (676 puts vs 577 calls), and 5.45 based on today's volume. A ratio above 1 means more puts than calls.

What is ARGX's implied volatility?

At-the-money implied volatility for ARGX options expiring November 20, 2026 is about 39.6%, an annualized estimate of how much the market expects argenx stock to move.

How many ARGX option expiration dates are there?

ARGX 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.