TransMedics Group (TMDX) Options Chain

NASDAQ: TMDXHealth CareBiotechnology: Electromedical & Electrotherapeutic ApparatusUSD

77.87-1.13 (-1.43%)

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

Expiration date

Expiration: Jan 21, 2028
Days to expiration: 468
Share price: $77.87
Put/call ratio (OI): 0.19
Put/call ratio (volume): 0.27
ATM implied volatility: 63.3%
Expected move: ±$55.83
Open interest (C / P): 5.72K / 1.10K

TMDX options summary

The TMDX options chain for the January 21, 2028 expiration lists 35 call and 34 put contracts, with 468 days until expiration. Open interest stands at 5,717 calls and 1,102 puts, a put/call ratio of 0.19, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $80.00 strike is 63.3%, which implies the market expects a move of about ±$55.83 (71.7%) in TransMedics Group stock by expiration.

The most open interest sits at the $100.00 call (1.69K contracts) and the $75.00 put (153 contracts).

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

TMDX options chain · January 21, 2028

TMDX 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
31	2	81.8%	52.60	45.50	50.00	35.00	0.00	5.00	2.70	64.2%	4	38
371	5	79.7%	44.93	42.00	46.50	40.00	1.40	6.00	3.60	63.5%	1	51
20	15	76.9%	46.00	38.50	43.00	45.00	3.60	5.50	5.15	59.6%	1	26
77	1	75.8%	46.00	35.50	40.00	50.00	0.00	0.00	7.30	6.3%	1	0
221	1	74.0%	40.40	32.50	37.00	55.00	6.10	11.00	8.80	60.6%	4	63
135	3	73.6%	32.80	30.00	34.50	60.00	8.50	12.50	10.70	59.3%	21	88
136	1	74.8%	33.58	28.80	32.00	65.00	0.00	0.00	13.08	3.1%	5	0
201	1	71.0%	27.18	25.00	29.50	70.00	13.30	16.70	15.42	56.9%	1	145
130	2	71.0%	26.00	23.20	27.50	75.00	16.00	20.50	18.60	57.9%	8	153
TMDX $77.87
555	11	69.9%	24.19	21.00	25.50	80.00	18.50	23.50	20.22	56.8%	1	151
232	7	69.4%	22.50	19.00	24.00	85.00	21.50	26.50	22.69	55.9%	1	83
117	1	69.5%	21.30	17.70	22.40	90.00	25.00	29.50	24.25	55.3%	1	31
113	2	70.0%	20.50	16.80	21.00	95.00	28.10	33.00	28.30	54.5%	1	34
1,685	5	69.0%	18.60	15.10	19.50	100.00	31.50	36.50	30.79	53.6%	1	41
56	10	68.4%	19.00	13.50	18.40	105.00	35.50	40.00	35.25	53.3%	1	60
121	2	68.2%	15.40	12.60	17.00	110.00	39.00	44.00	39.50	52.5%	1	35
43	1	68.7%	15.60	12.30	15.70	115.00	51.50	56.50	52.27	76.9%	4	3
136	2	67.8%	12.80	10.60	15.00	120.00	40.60	45.00	61.50	36.0%	1	21
91	7	68.3%	14.36	10.30	14.00	125.00	51.00	56.00	50.25	50.7%	1	12
23	8	68.6%	19.90	9.80	13.20	130.00	0.00	0.00	58.60	—	1	0
67	123	84.2%	16.70	14.00	18.30	135.00	59.50	64.00	62.18	56.5%	1	7
88	1	67.5%	12.70	7.80	11.70	140.00	70.00	75.00	74.00	69.4%	1	6
25	1	67.8%	9.00	7.10	11.40	145.00	0.00	0.00	65.00	—	2	0
468	20	67.7%	8.50	6.60	10.70	150.00	72.50	77.50	72.00	56.7%	1	7
111	1	66.3%	8.90	6.10	9.30	155.00	0.00	0.00	58.00	—	—	0
101	1	64.6%	7.00	5.50	8.00	160.00	87.50	92.10	91.20	67.8%	1	2
31	1	67.5%	7.80	5.10	9.20	165.00	0.00	0.00	60.10	—	—	0
27	3	80.2%	7.34	8.50	12.80	170.00	91.00	96.00	89.90	56.7%	1	20
26	1	79.6%	6.84	7.50	12.50	175.00	101.00	106.00	104.80	67.7%	1	1
54	3	65.7%	7.70	3.00	8.00	180.00	0.00	0.00	69.90	—	3	0
48	12	66.9%	6.50	3.00	8.00	185.00	0.00	0.00	74.20	—	1	0
49	10	66.2%	10.80	2.50	7.50	190.00	119.00	123.50	97.70	80.8%	1	2
0	—	12.5%	32.50	0.00	0.00	195.00	—	—	—	—	—	—
48	1	66.6%	5.70	2.10	7.00	200.00	110.00	114.50	122.20	—	7	22
80	40	66.3%	5.10	1.50	6.50	210.00	138.00	142.50	114.00	82.1%	1	0

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 TMDX put/call ratio?

For the January 21, 2028 expiration, the TMDX put/call ratio based on open interest is 0.19 (1,102 puts vs 5,717 calls), and 0.27 based on today's volume. A ratio above 1 means more puts than calls.

What is TMDX's implied volatility?

At-the-money implied volatility for TMDX options expiring January 21, 2028 is about 63.3%, an annualized estimate of how much the market expects TransMedics Group stock to move.

How many TMDX option expiration dates are there?

TMDX 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.