BillionToOne (BLLN) Options Chain

NASDAQ: BLLNHealth CareMedical SpecialitiesUSD

95.41-0.34 (-0.36%)

At close: Oct 8, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Oct 16, 2026
Days to expiration: 8
Share price: $95.41
Put/call ratio (OI): 0.73
Put/call ratio (volume): 0.65
ATM implied volatility: 57.7%
Expected move: ±$8.16
Open interest (C / P): 1.24K / 908

BLLN options summary

The BLLN options chain for the October 16, 2026 expiration lists 16 call and 12 put contracts, with 8 days until expiration. Open interest stands at 1,240 calls and 908 puts, a put/call ratio of 0.73, which is fairly balanced between calls and puts. At-the-money implied volatility near the $95.00 strike is 57.7%, which implies the market expects a move of about ±$8.16 (8.5%) in BillionToOne stock by expiration.

The most open interest sits at the $125.00 call (430 contracts) and the $85.00 put (337 contracts).

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

BLLN options chain · October 16, 2026

BLLN 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
0	—	—	30.80	0.00	0.00	65.00	—	—	—	—	—	—
0	—	—	26.30	0.00	0.00	70.00	0.00	0.65	0.14	127.5%	11	103
—	—	—	—	—	—	75.00	0.00	2.15	0.66	140.6%	1	3
—	—	—	—	—	—	80.00	0.00	2.15	0.75	112.3%	3	52
1	—	59.0%	22.40	8.90	12.60	85.00	0.00	1.50	0.55	74.4%	3	337
5	1	59.5%	5.85	4.70	8.60	90.00	0.00	1.75	1.90	50.8%	1	10
12	1	55.0%	3.27	2.50	4.10	95.00	1.30	5.10	3.30	60.5%	6	8
BLLN $95.41
117	4	53.1%	1.90	0.70	1.90	100.00	4.10	8.00	3.90	56.4%	52	128
230	51	71.4%	0.92	0.00	2.10	105.00	8.30	12.00	3.70	57.6%	7	166
142	2	72.6%	1.25	0.00	0.95	110.00	13.10	16.70	5.20	65.3%	3	75
147	50	85.0%	0.15	0.05	0.75	115.00	17.90	21.50	20.95	66.0%	2	5
20	1	107.8%	0.38	0.00	1.15	120.00	22.70	26.50	12.28	57.8%	11	13
430	5	84.4%	0.25	0.00	0.15	125.00	27.70	31.40	17.68	165.3%	5	8
53	4	156.2%	0.30	0.00	2.15	130.00	—	—	—	—	—	—
44	5	169.4%	0.90	0.00	2.15	135.00	—	—	—	—	—	—
1	3	181.9%	0.80	0.00	2.15	140.00	—	—	—	—	—	—
25	25	193.7%	1.45	0.00	2.15	145.00	—	—	—	—	—	—
13	10	204.9%	0.78	0.00	2.15	150.00	—	—	—	—	—	—

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 BLLN put/call ratio?

For the October 16, 2026 expiration, the BLLN put/call ratio based on open interest is 0.73 (908 puts vs 1,240 calls), and 0.65 based on today's volume. A ratio above 1 means more puts than calls.

What is BLLN's implied volatility?

At-the-money implied volatility for BLLN options expiring October 16, 2026 is about 57.7%, an annualized estimate of how much the market expects BillionToOne stock to move.

How many BLLN option expiration dates are there?

BLLN has 4 listed expiration dates, from Oct 16, 2026 to Mar 19, 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.