Omeros (OMER) Options Chain

NASDAQ: OMERHealth CareBiotechnology: Pharmaceutical PreparationsUSD

19.77+0.65 (+3.40%)

Market open · Delayed 15 min · as of Oct 9, 1:47 PM ET

Expiration date

Expiration: Oct 16, 2026
Days to expiration: 7
Share price: $19.77
Put/call ratio (OI): 0.61
Put/call ratio (volume): 0.75
ATM implied volatility: 58.0%
Expected move: ±$1.59
Open interest (C / P): 3.73K / 2.27K

OMER options summary

The OMER options chain for the October 16, 2026 expiration lists 14 call and 11 put contracts, with 7 days until expiration. Open interest stands at 3,727 calls and 2,266 puts, a put/call ratio of 0.61, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $20.00 strike is 58.0%, which implies the market expects a move of about ±$1.59 (8.0%) in Omeros stock by expiration.

The most open interest sits at the $22.00 call (1.58K contracts) and the $21.00 put (836 contracts).

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

OMER options chain · October 16, 2026

OMER 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
6	6	550.8%	9.20	8.50	11.00	10.00	0.00	0.75	0.08	367.2%	—	300
—	—	—	—	—	—	11.00	0.00	0.75	0.10	325.0%	—	100
0	5	—	6.35	0.00	0.00	13.00	—	—	—	—	—	—
3	—	225.4%	4.55	4.60	6.20	14.00	0.00	0.75	0.05	215.6%	—	80
9	1	120.3%	5.50	3.70	6.00	15.00	0.00	0.25	0.13	133.6%	50	156
—	—	—	—	—	—	16.00	0.00	0.75	0.05	152.3%	100	65
10	5	116.4%	3.00	1.80	3.10	17.00	0.00	0.75	0.25	122.3%	30	169
33	5	74.6%	1.27	1.10	2.00	18.00	0.00	0.70	0.40	89.3%	1	158
160	5	75.2%	0.50	0.35	1.30	19.00	0.25	0.40	0.33	55.7%	326	238
OMER $19.77
842	7	58.2%	0.55	0.40	0.75	20.00	0.60	1.00	1.15	57.8%	2	164
290	410	55.5%	0.25	0.15	0.30	21.00	1.10	2.25	2.15	77.7%	10	836
1,584	216	59.4%	0.10	0.05	0.15	22.00	1.80	4.00	3.20	124.6%	1	0
254	3	115.4%	0.10	0.00	0.75	23.00	—	—	—	—	—	—
431	25	134.0%	0.05	0.00	0.75	24.00	—	—	—	—	—	—
103	2	81.3%	0.05	0.00	0.05	25.00	—	—	—	—	—	—
2	2	166.8%	0.10	0.00	0.75	26.00	—	—	—	—	—	—

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 OMER put/call ratio?

For the October 16, 2026 expiration, the OMER put/call ratio based on open interest is 0.61 (2,266 puts vs 3,727 calls), and 0.75 based on today's volume. A ratio above 1 means more puts than calls.

What is OMER's implied volatility?

At-the-money implied volatility for OMER options expiring October 16, 2026 is about 58.0%, an annualized estimate of how much the market expects Omeros stock to move.

How many OMER option expiration dates are there?

OMER has 8 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.