Price Alert

Repligen Corporation (RGEN)

NASDAQ: RGEN · Real-Time Price · USD

125.61

3.93 (3.23%)

At close: Sep 26, 2025, 3:59 PM

125.60

-0.01%

After-hours: Sep 26, 2025, 04:59 PM EDT

RGEN Option Overview

Overview for all option chains of RGEN. As of September 28, 2025, RGEN options have an IV of 81% and an IV rank of 170.4%. The volume is 726 contracts, which is 615.25% of average daily volume of 118 contracts. The volume put-call ratio is 5.6, indicating a bearish sentiment in the market.

Implied Volatility

Implied Volatility (30d)

81%

IV Rank

100%

Historical Volatility

41.57%

IV Low

45.52% on Feb 10, 2025

IV High

66.34% on Dec 06, 2024

Open Interest (OI)

Today's Open Interest

10,035

Put-Call Ratio

1.78

Put Open Interest

6,419

Call Open Interest

3,616

Open Interest Avg (30-day)

9,353

Today vs Open Interest Avg (30-day)

107.29%

Option Volume

Today's Volume

726

Put-Call Ratio

5.6

Put Volume

616

Call Volume

110

Volume Avg (30-day)

118

Today vs Volume Avg (30-day)

615.25%

Option Chain Statistics

This table provides a comprehensive overview of all RGEN options grouped by their expiration dates.

Expiration	Call Vol	Put Vol	P/C Vol	Call OI	Put OI	P/C OI	Implied Volatility	Max Pain
Oct 17, 2025	59	1	0.02	834	245	0.29	81%	110
Nov 21, 2025	11	8	0.73	169	205	1.21	60.38%	120
Dec 19, 2025	18	0	0	2,061	5,781	2.8	55.33%	145
Jan 16, 2026	0	0	0	0	0	0	n/a	170
Feb 20, 2026	9	1	0.11	90	37	0.41	46.36%	110
May 15, 2026	0	0	0	20	0	0	45.78%	65
Jun 18, 2026	13	606	46.62	442	151	0.34	45.25%	130