Regeneron Pharmaceuticals (REGN) Options Chain

NASDAQ: REGNHealthcareBiotechnologyUSD

746.54+6.97 (+0.94%)

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

Expiration date

Expiration: Oct 30, 2026
Days to expiration: 19
Share price: $746.54
Put/call ratio (OI): 0.71
Put/call ratio (volume): 1.14
ATM implied volatility: 40.7%
Expected move: ±$69.29
Open interest (C / P): 231 / 165

REGN options summary

The REGN options chain for the October 30, 2026 expiration lists 28 call and 17 put contracts, with 19 days until expiration. Open interest stands at 231 calls and 165 puts, a put/call ratio of 0.71, which is fairly balanced between calls and puts. At-the-money implied volatility near the $750.00 strike is 40.7%, which implies the market expects a move of about ±$69.29 (9.3%) in Regeneron Pharmaceuticals stock by expiration.

The most open interest sits at the $780.00 call (49 contracts) and the $800.00 put (43 contracts).

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

REGN options chain · October 30, 2026

REGN 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	—	68.1%	216.00	183.20	192.80	560.00	—	—	—	—	—	—
1	—	66.5%	206.00	173.80	182.70	570.00	—	—	—	—	—	—
—	—	—	—	—	—	640.00	0.05	7.60	0.05	51.0%	2	2
17	—	55.5%	130.71	87.70	94.90	660.00	0.05	7.20	4.50	52.6%	—	1
—	—	—	—	—	—	670.00	0.95	8.80	6.18	52.0%	1	2
—	—	—	—	—	—	680.00	2.10	9.60	5.30	49.0%	2	6
—	—	—	—	—	—	690.00	3.10	11.20	12.00	47.4%	1	34
1	1	50.0%	60.00	53.10	62.00	700.00	4.10	13.60	13.97	46.8%	6	7
—	—	—	—	—	—	710.00	7.40	15.80	22.00	45.1%	1	2
6	5	47.4%	39.58	39.00	47.40	720.00	10.50	18.80	13.75	44.2%	3	3
16	4	44.7%	31.58	32.30	39.80	730.00	—	—	—	—	—	—
11	3	45.6%	31.45	27.90	35.00	740.00	19.30	26.20	29.35	42.3%	1	3
REGN $746.54
13	6	40.8%	26.25	21.30	26.80	750.00	24.20	30.10	30.10	40.6%	1	3
10	1	45.0%	19.35	17.10	25.40	760.00	28.60	36.30	31.20	41.4%	3	6
36	15	44.4%	13.40	13.00	21.10	770.00	35.70	42.20	19.50	40.9%	2	1
49	8	43.8%	13.60	9.20	17.30	780.00	42.10	47.60	28.80	38.9%	9	9
24	11	41.3%	10.70	6.00	12.80	790.00	49.10	54.80	49.40	38.8%	17	34
6	15	44.3%	8.50	4.00	12.10	800.00	56.00	62.40	38.30	38.7%	42	43
6	2	44.8%	11.19	2.60	10.20	810.00	64.00	70.50	31.40	38.7%	—	3
2	2	47.4%	9.39	0.80	9.60	820.00	72.00	80.20	37.95	41.5%	—	6
1	—	49.7%	22.00	0.05	9.00	830.00	—	—	—	—	—	—
6	2	51.1%	2.65	0.05	8.10	840.00	—	—	—	—	—	—
4	1	46.4%	3.31	0.00	4.90	850.00	—	—	—	—	—	—
1	1	49.3%	1.50	0.00	4.90	860.00	—	—	—	—	—	—
1	—	54.8%	14.10	0.00	4.90	880.00	—	—	—	—	—	—
2	—	57.4%	8.90	0.00	4.90	890.00	—	—	—	—	—	—
1	—	51.0%	5.50	0.00	4.90	900.00	—	—	—	—	—	—
1	—	53.3%	4.50	0.00	4.90	910.00	—	—	—	—	—	—
4	3	55.5%	0.85	0.00	4.90	920.00	—	—	—	—	—	—
2	—	57.7%	3.20	0.00	4.90	930.00	—	—	—	—	—	—
3	—	59.9%	2.45	0.00	4.90	940.00	—	—	—	—	—	—
5	—	62.0%	2.25	0.00	4.90	950.00	—	—	—	—	—	—
1	—	64.1%	2.25	0.00	4.90	960.00	—	—	—	—	—	—

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 REGN put/call ratio?

For the October 30, 2026 expiration, the REGN put/call ratio based on open interest is 0.71 (165 puts vs 231 calls), and 1.14 based on today's volume. A ratio above 1 means more puts than calls.

What is REGN's implied volatility?

At-the-money implied volatility for REGN options expiring October 30, 2026 is about 40.7%, an annualized estimate of how much the market expects Regeneron Pharmaceuticals stock to move.

How many REGN option expiration dates are there?

REGN has 16 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.