Ultragenyx Pharmaceutical (RARE) Options Chain

NASDAQ: RAREHealth CareBiotechnology: Pharmaceutical PreparationsUSD

15.48+0.19 (+1.24%)

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

Expiration date

Expiration: Nov 20, 2026
Days to expiration: 40
Share price: $15.48
Put/call ratio (OI): 0.27
Put/call ratio (volume): 25.38
ATM implied volatility: 62.7%
Expected move: ±$3.22
Open interest (C / P): 14.33K / 3.94K

RARE options summary

The RARE options chain for the November 20, 2026 expiration lists 17 call and 8 put contracts, with 40 days until expiration. Open interest stands at 14,326 calls and 3,939 puts, a put/call ratio of 0.27, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $15.00 strike is 62.7%, which implies the market expects a move of about ±$3.22 (20.8%) in Ultragenyx Pharmaceutical stock by expiration.

The most open interest sits at the $20.00 call (4.30K contracts) and the $12.50 put (2.10K contracts).

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

RARE options chain · November 20, 2026

RARE 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
1	1	230.5%	8.53	7.00	8.70	7.50	0.00	0.70	0.10	181.8%	20	0
57	2	90.6%	5.15	5.00	6.20	10.00	0.00	0.35	0.15	99.6%	20	10
118	3	64.5%	3.50	2.65	3.80	12.50	0.15	0.45	0.22	69.2%	2	2,105
1,521	21	70.8%	1.46	1.40	1.95	15.00	0.75	1.00	0.95	54.7%	22	454
RARE $15.48
3,439	19	62.3%	0.60	0.45	0.70	17.50	2.05	3.00	3.40	58.4%	200	257
4,304	11	68.0%	0.25	0.20	0.30	20.00	4.30	5.30	5.30	70.3%	1	1,080
196	3	77.2%	0.22	0.10	0.20	22.50	6.50	7.90	7.75	80.5%	4	27
565	5	75.0%	0.05	0.00	0.10	25.00	9.00	10.30	9.04	89.8%	6,000	6
90	3	109.2%	0.05	0.00	0.35	27.50	—	—	—	—	—	—
2,393	26	117.4%	0.05	0.00	0.30	30.00	—	—	—	—	—	—
42	1	152.7%	0.33	0.00	0.70	32.50	—	—	—	—	—	—
278	96	163.1%	0.06	0.00	0.70	35.00	—	—	—	—	—	—
0	2	50.0%	3.90	0.00	0.00	37.50	—	—	—	—	—	—
1,036	3	181.3%	0.37	0.00	0.70	40.00	—	—	—	—	—	—
103	3	131.3%	1.20	0.00	0.05	45.00	—	—	—	—	—	—
0	40	50.0%	2.08	0.00	0.00	47.50	—	—	—	—	—	—
183	8	141.4%	0.05	0.00	0.05	50.00	—	—	—	—	—	—

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 RARE put/call ratio?

For the November 20, 2026 expiration, the RARE put/call ratio based on open interest is 0.27 (3,939 puts vs 14,326 calls), and 25.38 based on today's volume. A ratio above 1 means more puts than calls.

What is RARE's implied volatility?

At-the-money implied volatility for RARE options expiring November 20, 2026 is about 62.7%, an annualized estimate of how much the market expects Ultragenyx Pharmaceutical stock to move.

How many RARE option expiration dates are there?

RARE has 11 listed expiration dates, from Oct 16, 2026 to Jan 19, 2029.

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.