Prime Medicine (PRME) Options Chain
NASDAQ: PRMEHealth CareBiotechnology: Biological Products (No Diagnostic Substances)USD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 40
- Share price
- $3.99
- Put/call ratio (OI)
- 0.24
- Put/call ratio (volume)
- 0.03
- Expected move
- ±$1.12
- Open interest (C / P)
- 3.24K / 779
PRME options summary
The PRME options chain for the November 20, 2026 expiration lists 4 call and 3 put contracts, with 40 days until expiration. Open interest stands at 3,239 calls and 779 puts, a put/call ratio of 0.24, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $4.00 strike is 84.7%, which implies the market expects a move of about ±$1.12 (28.0%) in Prime Medicine stock by expiration.
The most open interest sits at the $5.00 call (2.59K contracts) and the $3.00 put (523 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
PRME options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 1.20 | 1.55 | 2.55 | 2.00 | 0.00 | 0.20 | 0.10 | |||||
| 0.80 | 0.50 | 1.50 | 3.00 | 0.00 | 0.60 | 0.25 | |||||
| 0.55 | 0.55 | 0.60 | 4.00 | 0.00 | 0.65 | 0.55 | |||||
| 0.29 | 0.25 | 0.60 | 5.00 | — | — | — | |||||
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 PRME put/call ratio?
For the November 20, 2026 expiration, the PRME put/call ratio based on open interest is 0.24 (779 puts vs 3,239 calls), and 0.03 based on today's volume. A ratio above 1 means more puts than calls.
What is PRME's implied volatility?
At-the-money implied volatility for PRME options expiring November 20, 2026 is about 84.7%, an annualized estimate of how much the market expects Prime Medicine stock to move.
How many PRME option expiration dates are there?
PRME has 6 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.