Repligen (RGEN) Options Chain

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

173.88+10.04 (+6.13%)

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

Expiration date

Expiration: Feb 19, 2027
Days to expiration: 131
Share price: $173.88
Put/call ratio (OI): 0.42
Put/call ratio (volume): 0.52
ATM implied volatility: 52.2%
Expected move: ±$54.37
Open interest (C / P): 269 / 113

RGEN options summary

The RGEN options chain for the February 19, 2027 expiration lists 28 call and 16 put contracts, with 131 days until expiration. Open interest stands at 269 calls and 113 puts, a put/call ratio of 0.42, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $175.00 strike is 52.2%, which implies the market expects a move of about ±$54.37 (31.3%) in Repligen stock by expiration.

The most open interest sits at the $230.00 call (52 contracts) and the $170.00 put (30 contracts).

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

RGEN options chain · February 19, 2027

RGEN 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	1	99.3%	109.30	104.00	107.30	70.00	0.00	2.20	1.00	89.8%	1	2
—	—	—	—	—	—	75.00	0.00	2.30	1.10	84.4%	1	5
1	—	89.0%	102.40	94.30	97.50	80.00	0.00	2.40	1.50	79.3%	1	3
1	—	136.2%	56.90	96.70	101.00	85.00	0.00	2.45	3.20	74.2%	2	5
1	—	79.1%	99.80	84.40	87.80	90.00	0.00	2.70	2.60	70.5%	1	3
1	—	116.3%	53.38	83.00	86.50	100.00	0.00	2.85	3.85	61.5%	—	1
6	—	69.4%	95.80	70.30	73.60	105.00	—	—	—	—	—	—
—	—	—	—	—	—	110.00	0.00	3.20	1.15	54.0%	1	3
—	—	—	—	—	—	115.00	0.00	3.40	1.45	50.5%	2	3
—	—	—	—	—	—	120.00	0.30	3.70	1.85	58.1%	1	2
0	2	60.5%	52.70	52.50	55.80	125.00	1.05	4.10	2.35	55.3%	1	2
2	2	58.1%	48.70	48.50	51.10	130.00	2.25	5.00	2.80	54.4%	2	2
0	1	—	52.60	0.00	0.00	140.00	—	—	—	—	—	—
11	—	50.5%	26.85	33.20	37.00	145.00	—	—	—	—	—	—
13	1	54.9%	47.40	33.50	37.00	150.00	—	—	—	—	—	—
1	—	54.4%	43.20	30.40	33.80	155.00	—	—	—	—	—	—
40	1	53.3%	33.50	27.00	30.80	160.00	10.30	14.20	11.10	51.1%	—	2
1	2	52.9%	18.45	24.50	27.80	165.00	12.70	16.20	12.90	50.2%	—	19
5	3	53.0%	22.80	22.30	25.20	170.00	14.50	18.60	14.50	49.9%	28	30
RGEN $173.88
3	—	52.2%	27.46	19.30	23.10	175.00	—	—	—	—	—	—
4	2	51.7%	24.20	17.00	20.90	180.00	—	—	—	—	—	—
15	3	51.8%	22.60	15.40	18.80	185.00	23.20	27.00	21.60	48.9%	—	1
8	6	50.8%	26.50	13.10	16.80	190.00	26.40	30.00	21.30	48.2%	—	30
26	1	50.9%	25.65	11.70	15.10	195.00	—	—	—	—	—	—
13	2	50.8%	21.77	10.20	13.70	200.00	—	—	—	—	—	—
31	30	54.5%	18.10	7.00	10.90	210.00	—	—	—	—	—	—
6	5	54.2%	14.00	5.00	8.70	220.00	—	—	—	—	—	—
52	14	54.8%	8.90	3.50	7.20	230.00	—	—	—	—	—	—
1	—	53.8%	6.50	2.10	5.50	240.00	—	—	—	—	—	—
2	1	53.8%	2.25	1.20	4.40	250.00	—	—	—	—	—	—
3	1	52.9%	1.70	0.25	3.30	260.00	—	—	—	—	—	—
20	1	56.3%	1.30	0.00	3.30	270.00	—	—	—	—	—	—

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 RGEN put/call ratio?

For the February 19, 2027 expiration, the RGEN put/call ratio based on open interest is 0.42 (113 puts vs 269 calls), and 0.52 based on today's volume. A ratio above 1 means more puts than calls.

What is RGEN's implied volatility?

At-the-money implied volatility for RGEN options expiring February 19, 2027 is about 52.2%, an annualized estimate of how much the market expects Repligen stock to move.

How many RGEN option expiration dates are there?

RGEN has 7 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.