OmniAb (OABI) Options Chain

NASDAQ: OABIHealth CareBiotechnology: Commercial Physical & Biological ResarchUSD

4.79+0.13 (+2.79%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Jan 15, 2027
Days to expiration: 96
Share price: $4.79
Put/call ratio (OI): 0.01
Put/call ratio (volume): 0.55
ATM implied volatility: 77.1%
Expected move: ±$1.89
Open interest (C / P): 3.41K / 36

OABI options summary

The OABI options chain for the January 15, 2027 expiration lists 4 call and 2 put contracts, with 96 days until expiration. Open interest stands at 3,414 calls and 36 puts, a put/call ratio of 0.01, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $5.00 strike is 77.1%, which implies the market expects a move of about ±$1.89 (39.5%) in OmniAb stock by expiration.

The most open interest sits at the $5.00 call (3.08K contracts) and the $2.50 put (30 contracts).

Summary generated from market data by MetaCap's automated system. Methodology

OABI options chain · January 15, 2027

OABI calls and puts by strike price. Shaded cells are in the money.
Calls							Puts
OI	Vol	IV	Last	Bid	Ask	Strike	Bid	Ask	Last	IV	Vol	OI
56	6	99.6%	2.40	0.95	3.80	2.50	0.00	0.15	0.32	96.1%	6	30
OABI $4.79
3,078	12	82.6%	0.45	0.10	1.35	5.00	0.00	1.65	0.90	71.5%	6	6
278	2	118.0%	0.35	0.00	0.95	7.50	—	—	—	—	—	—
2	2	184.4%	0.15	0.00	1.55	10.00	—	—	—	—	—	—

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 OABI put/call ratio?

For the January 15, 2027 expiration, the OABI put/call ratio based on open interest is 0.01 (36 puts vs 3,414 calls), and 0.55 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 January 15, 2027 is about 77.1%, 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.