OmniAb (OABI) Options Chain
NASDAQ: OABIHealth CareBiotechnology: Commercial Physical & Biological ResarchUSD
Market open · Delayed 15 min · as of Oct 9, 9:37 AM ET
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 7
- Share price
- $4.76
- Put/call ratio (OI)
- 0.17
- Put/call ratio (volume)
- 0.75
- Expected move
- ±$0.0824
- Open interest (C / P)
- 1.71K / 297
OABI options summary
The OABI options chain for the October 16, 2026 expiration lists 3 call and 3 put contracts, with 7 days until expiration. Open interest stands at 1,712 calls and 297 puts, a put/call ratio of 0.17, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $5.00 strike is 12.5%, which implies the market expects a move of about ±$0.0824 (1.7%) in OmniAb stock by expiration.
The most open interest sits at the $5.00 call (1.61K contracts) and the $2.50 put (172 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
OABI options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 2.14 | 0.00 | 0.00 | 2.50 | 0.00 | 0.00 | 0.04 | |||||
| 0.10 | 0.00 | 0.00 | 5.00 | 0.00 | 0.00 | 0.55 | |||||
| 0.05 | 0.00 | 0.00 | 7.50 | — | — | — | |||||
| — | — | — | 10.00 | 0.00 | 0.00 | 5.49 | |||||
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 OABI put/call ratio?
For the October 16, 2026 expiration, the OABI put/call ratio based on open interest is 0.17 (297 puts vs 1,712 calls), and 0.75 based on today's volume. A ratio above 1 means more puts than calls.
What is OABI's implied volatility?
At-the-money implied volatility for OABI options expiring October 16, 2026 is about 12.5%, an annualized estimate of how much the market expects OmniAb stock to move.
How many OABI option expiration dates are there?
OABI 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.