CollPlant Biotechnologies (CLGN) Options Chain
NASDAQ: CLGNHealth CareIndustrial SpecialtiesUSD
At close: Oct 8, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 7
- Share price
- $3.97
- Put/call ratio (OI)
- 0.09
- Put/call ratio (volume)
- 3.50
- Expected move
- ±$0.2749
- Open interest (C / P)
- 226 / 20
CLGN options summary
The CLGN options chain for the October 16, 2026 expiration lists 2 call and 3 put contracts, with 7 days until expiration. Open interest stands at 226 calls and 20 puts, a put/call ratio of 0.09, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $5.00 strike is 50.0%, which implies the market expects a move of about ±$0.2749 (6.9%) in CollPlant Biotechnologies stock by expiration.
The most open interest sits at the $2.50 call (224 contracts) and the $7.50 put (8 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
CLGN options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 0.05 | 0.00 | 0.00 | 2.50 | 0.00 | 0.00 | 2.15 | |||||
| 0.06 | 0.00 | 0.00 | 5.00 | 0.00 | 0.00 | 4.60 | |||||
| — | — | — | 7.50 | 0.00 | 0.00 | 7.25 | |||||
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 CLGN put/call ratio?
For the October 16, 2026 expiration, the CLGN put/call ratio based on open interest is 0.09 (20 puts vs 226 calls), and 3.50 based on today's volume. A ratio above 1 means more puts than calls.
What is CLGN's implied volatility?
At-the-money implied volatility for CLGN options expiring October 16, 2026 is about 50.0%, an annualized estimate of how much the market expects CollPlant Biotechnologies stock to move.
How many CLGN option expiration dates are there?
CLGN has 3 listed expiration dates, from Oct 16, 2026 to Apr 16, 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.