SELLAS Life Sciences Group (SLS) Options Chain

NASDAQ: SLSHealth CareBiotechnology: Pharmaceutical PreparationsUSD

11.65+0.39 (+3.46%)

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

Expiration date

Expiration: Jan 21, 2028
Days to expiration: 468
Share price: $11.65
Put/call ratio (OI): 0.18
Put/call ratio (volume): 1.80
ATM implied volatility: 138.3%
Expected move: ±$18.24
Open interest (C / P): 119.96K / 21.73K

SLS options summary

The SLS options chain for the January 21, 2028 expiration lists 22 call and 21 put contracts, with 468 days until expiration. Open interest stands at 119,962 calls and 21,730 puts, a put/call ratio of 0.18, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $12.00 strike is 138.3%, which implies the market expects a move of about ±$18.24 (156.6%) in SELLAS Life Sciences Group stock by expiration.

The most open interest sits at the $2.00 call (17.29K contracts) and the $2.50 put (5.52K contracts).

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

SLS options chain · January 21, 2028

SLS 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
420	1	50.0%	10.98	10.30	12.00	0.50	0.00	0.25	0.05	196.9%	3	38
2,687	27	185.6%	10.60	10.10	11.80	1.00	0.10	0.45	0.15	180.1%	14	709
564	21	156.3%	9.41	9.80	11.20	1.50	0.15	1.50	0.39	228.7%	32	406
17,293	1	143.6%	9.80	9.60	10.60	2.00	0.35	0.65	1.54	149.2%	1	325
14,562	2	114.3%	9.27	9.00	10.00	2.50	0.25	1.30	0.75	153.7%	24	5,521
6,905	5	125.2%	8.53	8.80	9.80	3.00	0.50	1.30	1.01	143.8%	3	663
1,536	1	127.5%	9.19	8.50	9.60	3.50	0.90	1.55	1.30	148.2%	100	432
11,292	60	119.9%	8.70	8.30	9.00	4.00	0.35	1.85	1.50	125.5%	1	505
2,930	20	130.4%	8.68	8.20	9.00	4.50	1.15	2.15	1.76	140.3%	20	177
13,004	26	131.4%	8.48	7.90	8.90	5.00	1.85	2.30	2.10	146.3%	36	3,709
1,733	2	123.6%	7.90	7.30	8.70	5.50	0.00	4.10	2.60	131.8%	1	25
1,980	1	131.6%	7.50	6.90	9.10	6.00	1.50	5.50	5.25	180.1%	18	190
4,752	1	135.5%	7.20	6.90	8.60	7.00	1.00	5.80	5.90	146.2%	18	262
13,652	5	140.1%	6.90	6.60	7.50	10.00	5.10	6.20	5.70	147.3%	47	4,674
SLS $11.65
3,585	5	133.8%	6.55	5.60	7.10	12.00	6.60	7.50	7.00	142.7%	2	569
7,653	9	145.1%	5.90	5.30	7.20	15.00	8.70	10.50	9.80	145.2%	1	222
3,413	3	148.8%	5.42	5.00	7.20	17.00	0.00	0.00	11.90	—	21	0
657	5	141.2%	5.25	4.80	5.90	20.00	11.50	15.50	13.80	137.1%	1	1
2,865	2	135.9%	4.80	4.00	5.70	22.00	0.00	0.00	16.20	—	15	0
368	5	132.6%	4.38	2.10	6.60	25.00	—	—	—	—	—	—
407	3	134.6%	4.10	2.00	6.50	27.00	17.50	21.50	21.40	132.7%	2	0
7,704	1	140.6%	4.13	3.80	4.80	30.00	20.70	22.80	22.40	123.5%	10	3,302

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 SLS put/call ratio?

For the January 21, 2028 expiration, the SLS put/call ratio based on open interest is 0.18 (21,730 puts vs 119,962 calls), and 1.80 based on today's volume. A ratio above 1 means more puts than calls.

What is SLS's implied volatility?

At-the-money implied volatility for SLS options expiring January 21, 2028 is about 138.3%, an annualized estimate of how much the market expects SELLAS Life Sciences Group stock to move.

How many SLS option expiration dates are there?

SLS has 11 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.