TransMedics Group, Inc. options tape

Name: TransMedics Group, Inc. (TMDX) options tape: open interest, put/call, the priced move and the day's positioning
Creator: GreekSoup
License: https://creativecommons.org/licenses/by/4.0/

These figures are updated after the US market closes, every trading day. For the live chain, go to CBOE's own page for TMDX.

Updated after the US market close on 9 October 2026, with TransMedics Group, Inc. at $77.87: open interest within 90 days was 14,900 call and 8,491 put contracts, a put/call ratio of 0.57; the day's volume was 3,073 calls and 3,159 puts (1.03). The most call open interest sits at the $100.00 strike (3,343 contracts) and the most put open interest at $70.00 (1,261). The at-the-money straddle for 16 October 2026, 4 days out, was priced at 6.1% of spot. For 6 November 2026, implied volatility was 85.6% at the put 5% below spot and 85.8% at the call 5% above, -0.2 points.

Spot$77.87-1.43% on the day

Put/call, open interest0.578,491 puts, 14,900 calls

Put/call, volume1.033,159 puts, 3,073 calls

Priced move6.1%straddle to 16 October 2026, 4 days

30-day implied volatility81.1%

Put minus call IV, 5% out-0.2 ptsto 6 November 2026

Where the open interest sits

Side	Strike	Open interest
Calls	$100.00	3,343
Puts	$70.00	1,261

The strike with the most open interest on each side, across expiries within 90 days.

Strikes where the day's volume was at least twice the open interest

Contract	Volume	Open interest before	Premium traded
16 October 2026 call at $80.00	2,886	71	$1.0 million
16 October 2026 put at $72.00	2,885	0	$706,825

Volume of at least 200 contracts and at least twice the open interest, with at least $25,000 of premium at the mid; contracts expiring the same day are left out.

Premium is mid price times volume times 100.

Source

Official exchange quotes, updated after each US market close. Figures describe positioning; they are not a forecast.

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