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Options flow · TransMedics Group

TMDX options flow

Last full session · October 23, 2026 · Delayed and summarised

Where the premium went

Call premium minus put premium, session by session.

15 sessions
Sep 24: $0 more on calls Sep 28: $0 more on calls Sep 30: $25.2K more on calls Oct 1: $0 more on calls Oct 2: $0 more on calls Oct 5: $0 more on calls Oct 7: $0 more on calls Oct 12: $90.1K more on calls Oct 14: $28.6K more on calls Oct 15: $200.3K more on calls Oct 19: $17.4K more on calls Oct 20: $115.2K more on calls Oct 21: $24.0K more on calls Oct 22: $0 more on calls Oct 23: $0 more on calls More on calls More on puts Largest net: $200.3K Sep 24 Oct 23

Above zero: more spent on calls. Below zero: more on puts. Bar heights share a scale within this stock's history; premium alone does not tell us whether a trade was bought or sold.

Put the activity in context

Derived readings from the same completed session.

Institutional-looking share

99%
99%

99% of the premium, by the size and shape of the trades

Relative options cost

70%
70%

Options are on the expensive side — higher than 70% of the last year for this stock

Most is riding on $70.00 and $100.00
the prices with the most contracts still open above and below
Trading far below its 52-week high
-17.1% over the last month
How to read these figures

Every reading here is one we computed from that session. The history plots the difference between aggregate call and put premium, scaled to the largest absolute reading in this window.

Institutional-looking activity is inferred from trade size and shape. Sweeps span multiple venues. Neither tells us who traded or guarantees a directional move.

Relative options cost compares this stock with its own past year. It is not the stock's implied volatility quoted as a percentage.