Septerna (SEPN) Options Chain
NASDAQ: SEPNHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 8, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 7
- Share price
- $36.90
- Put/call ratio (OI)
- 0.17
- Put/call ratio (volume)
- 0.44
- ATM implied volatility
- 314.4%
- Expected move
- ±$16.06
- Open interest (C / P)
- 76 / 13
SEPN options summary
The SEPN options chain for the October 16, 2026 expiration lists 16 call and 16 put contracts, with 7 days until expiration. Open interest stands at 76 calls and 13 puts, a put/call ratio of 0.17, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $37.00 strike is 314.4%, which implies the market expects a move of about ±$16.06 (43.5%) in Septerna stock by expiration.
The most open interest sits at the $33.00 call (50 contracts) and the $25.00 put (4 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
SEPN options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 20.00 | 0.00 | 0.00 | 1.00 | |||||
| 7.33 | 7.20 | 9.50 | 21.00 | 0.00 | 0.00 | 2.95 | |||||
| — | — | — | 22.00 | 0.00 | 4.30 | 0.95 | |||||
| — | — | — | 23.00 | 0.00 | 0.00 | 1.10 | |||||
| 27.20 | 0.00 | 0.00 | 24.00 | 0.00 | 4.20 | 1.05 | |||||
| — | — | — | 25.00 | 0.00 | 1.90 | 1.15 | |||||
| — | — | — | 26.00 | 0.00 | 4.40 | 1.50 | |||||
| — | — | — | 27.00 | 0.00 | 4.60 | 1.80 | |||||
| — | — | — | 28.00 | 0.00 | 4.70 | 2.15 | |||||
| — | — | — | 29.00 | 0.00 | 4.90 | 3.00 | |||||
| 9.20 | 5.00 | 9.40 | 30.00 | 0.00 | 4.90 | 3.90 | |||||
| 2.90 | 1.05 | 5.90 | 31.00 | — | — | — | |||||
| 9.50 | 0.00 | 0.00 | 32.00 | — | — | — | |||||
| 4.40 | 7.10 | 11.50 | 33.00 | — | — | — | |||||
| 6.17 | 0.00 | 0.00 | 35.00 | — | — | — | |||||
| 4.20 | 4.50 | 9.00 | 37.00 | — | — | — | |||||
| 11.46 | 0.00 | 0.00 | 38.00 | 0.00 | 0.00 | 2.15 | |||||
| 2.60 | 0.00 | 0.00 | 39.00 | — | — | — | |||||
| 0.29 | 0.00 | 0.00 | 40.00 | 0.00 | 0.00 | 3.62 | |||||
| 1.32 | 0.00 | 0.00 | 42.00 | 0.00 | 0.00 | 4.50 | |||||
| — | — | — | 43.00 | 0.00 | 0.00 | 5.00 | |||||
| 2.05 | 0.00 | 4.90 | 44.00 | — | — | — | |||||
| 5.30 | 0.00 | 0.00 | 45.00 | — | — | — | |||||
| 4.50 | 0.00 | 0.00 | 50.00 | 0.00 | 0.00 | 7.25 | |||||
| 1.45 | 0.00 | 4.20 | 55.00 | — | — | — | |||||
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 SEPN put/call ratio?
For the October 16, 2026 expiration, the SEPN put/call ratio based on open interest is 0.17 (13 puts vs 76 calls), and 0.44 based on today's volume. A ratio above 1 means more puts than calls.
What is SEPN's implied volatility?
At-the-money implied volatility for SEPN options expiring October 16, 2026 is about 314.4%, an annualized estimate of how much the market expects Septerna stock to move.
How many SEPN option expiration dates are there?
SEPN has 4 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.