Twist Bioscience (TWST) Options Chain

NASDAQ: TWSTHealthcareBiotechnologyUSD

152.05-3.60 (-2.31%)

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

Expiration date

Expiration: Oct 16, 2026
Days to expiration: 8
Share price: $152.05
Put/call ratio (OI): 0.89
Put/call ratio (volume): 0.21
ATM implied volatility: 81.9%
Expected move: ±$18.44
Open interest (C / P): 9.28K / 8.23K

TWST options summary

The TWST options chain for the October 16, 2026 expiration lists 56 call and 51 put contracts, with 8 days until expiration. Open interest stands at 9,280 calls and 8,227 puts, a put/call ratio of 0.89, which is fairly balanced between calls and puts. At-the-money implied volatility near the $150.00 strike is 81.9%, which implies the market expects a move of about ±$18.44 (12.1%) in Twist Bioscience stock by expiration.

The most open interest sits at the $210.00 call (2.49K contracts) and the $170.00 put (1.17K contracts).

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

TWST options chain · October 16, 2026

TWST 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
—	—	—	—	—	—	22.50	0.00	0.25	0.10	541.4%	—	20
6	3	817.2%	166.70	124.90	129.00	25.00	0.00	2.15	0.83	717.0%	24	25
—	—	—	—	—	—	27.50	0.00	2.55	1.00	702.7%	1	3
2	1	—	28.95	20.10	24.20	30.00	0.05	1.00	1.40	564.8%	1	1
10	1	696.9%	128.10	117.50	121.50	32.50	—	—	—	—	—	—
3	1	—	55.85	87.90	92.10	35.00	0.00	2.15	0.60	583.6%	1	3
6	1	617.8%	123.00	112.50	116.30	37.50	0.00	3.60	3.30	621.9%	1	0
2	1	50.0%	144.20	110.00	114.10	40.00	0.00	2.60	2.00	553.3%	1	24
40	36	50.0%	117.90	108.50	110.60	42.50	0.00	2.15	0.50	509.2%	2	1
2	1	50.0%	122.10	105.10	109.00	45.00	0.00	0.00	0.46	100.0%	2	0
1	2	—	43.50	91.60	95.60	47.50	2.15	6.00	6.40	645.8%	3	4
0	3	—	93.20	0.00	0.00	50.00	0.00	2.15	1.80	448.1%	1	2
6	4	—	12.53	34.20	37.20	52.50	0.00	0.00	0.25	50.0%	2	0
12	1	418.4%	104.40	95.10	98.20	55.00	0.00	2.15	1.20	412.7%	1	14
50	1	386.5%	65.18	92.60	95.50	57.50	0.00	2.15	1.50	396.1%	1	16
39	2	371.1%	116.65	90.10	93.00	60.00	0.00	1.50	0.05	354.7%	6	80
129	2	—	39.00	76.70	80.60	62.50	0.00	2.20	3.15	367.1%	2	7
6	1	—	49.00	58.10	62.30	65.00	0.00	2.20	3.65	352.5%	2	9
3	—	—	9.70	13.40	16.50	67.50	10.20	14.00	17.80	702.3%	—	5
38	1	328.2%	88.70	80.10	83.20	70.00	0.00	2.25	7.35	326.8%	3	14
11	10	315.1%	77.17	77.60	80.70	72.50	—	—	—	—	—	—
31	1	302.5%	109.60	75.10	78.20	75.00	0.00	2.30	5.85	302.5%	2	3
15	2	178.9%	89.70	72.50	76.70	77.50	—	—	—	—	—	—
10	3	50.0%	48.98	70.00	74.10	80.00	0.00	2.15	0.05	274.5%	18	67
2	1	50.0%	85.10	67.50	71.60	82.50	—	—	—	—	—	—
19	5	50.0%	42.00	65.10	69.00	85.00	0.00	2.10	0.05	250.9%	2	4
2	—	149.2%	73.70	62.50	66.70	87.50	—	—	—	—	—	—
15	8	50.0%	97.45	60.10	64.00	90.00	0.00	2.15	1.66	231.1%	—	2
1	5	—	19.40	48.40	52.10	92.50	0.00	0.00	5.50	50.0%	1	0
4	1	50.0%	86.45	55.10	59.00	95.00	0.00	0.15	0.10	135.2%	2	1,003
1	—	50.0%	67.50	52.50	56.60	97.50	0.00	2.15	2.00	201.3%	10	11
27	1	219.5%	94.58	50.00	53.90	100.00	0.05	0.20	0.41	130.3%	1	20
121	1	199.2%	76.50	45.00	48.90	105.00	0.00	2.15	0.01	173.3%	1	83
21	1	106.5%	85.30	40.20	44.20	110.00	0.00	0.30	0.05	106.6%	3	249
12	1	50.0%	21.18	35.10	39.00	115.00	0.00	0.70	0.08	108.4%	50	131
39	1	129.5%	70.33	30.30	33.40	120.00	0.00	0.55	0.25	90.2%	12	35
25	1	117.3%	30.00	25.50	28.60	125.00	0.00	0.80	0.40	83.1%	9	177
88	1	76.4%	29.65	21.20	24.10	130.00	0.00	1.30	1.20	77.9%	8	519
329	3	73.8%	17.00	16.70	19.60	135.00	0.30	3.50	2.00	89.3%	13	421
27	12	69.6%	12.30	12.70	15.00	140.00	1.30	4.60	3.50	86.9%	33	277
28	7	75.1%	10.40	9.40	12.00	145.00	2.95	5.60	4.90	82.9%	43	179
81	86	76.6%	8.50	6.80	9.00	150.00	5.50	8.10	7.50	87.3%	32	538
TWST $152.05
113	81	80.3%	5.75	4.80	7.00	155.00	8.30	10.70	9.00	87.6%	30	213
245	170	82.8%	3.00	3.20	5.40	160.00	11.50	14.00	14.26	88.7%	35	638
535	65	86.4%	2.20	2.90	3.50	165.00	15.00	17.10	17.74	85.1%	31	107
136	49	88.4%	1.50	1.40	3.20	170.00	19.00	21.50	24.97	88.4%	3	1,170
431	163	90.0%	1.30	0.90	2.35	175.00	23.60	26.40	28.00	97.4%	4	553
332	248	87.7%	0.91	0.50	1.45	180.00	28.10	30.40	26.40	94.9%	6	357
351	1	87.0%	0.85	0.00	1.20	185.00	32.70	35.30	24.50	99.5%	4	528
388	11	93.2%	0.55	0.05	1.00	190.00	37.20	40.30	39.70	102.2%	2	363
97	2	104.3%	0.48	0.00	1.20	195.00	42.40	45.30	44.72	114.0%	1	80
1,634	55	110.5%	0.30	0.25	0.85	200.00	47.30	50.10	49.71	117.7%	1	81
2,491	514	122.1%	0.28	0.25	0.70	210.00	57.20	60.00	58.89	129.6%	2	88
678	412	127.3%	0.05	0.05	0.60	220.00	67.10	70.00	46.80	141.7%	17	12
245	18	157.1%	0.20	0.00	1.30	230.00	76.70	79.90	75.00	141.3%	2	1
152	42	154.6%	0.35	0.00	0.75	240.00	86.90	89.90	91.05	159.2%	8	89
80	74	174.8%	0.20	0.05	1.00	250.00	—	—	—	—	—	—
108	2	174.4%	0.45	0.05	0.65	260.00	—	—	—	—	—	—

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 TWST put/call ratio?

For the October 16, 2026 expiration, the TWST put/call ratio based on open interest is 0.89 (8,227 puts vs 9,280 calls), and 0.21 based on today's volume. A ratio above 1 means more puts than calls.

What is TWST's implied volatility?

At-the-money implied volatility for TWST options expiring October 16, 2026 is about 81.9%, an annualized estimate of how much the market expects Twist Bioscience stock to move.

How many TWST option expiration dates are there?

TWST has 6 listed expiration dates, from Oct 16, 2026 to Dec 17, 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.