TMDX Short Volume
TransMedics Group, Inc. (TMDX) operates in the Healthcare sector, specifically the Medical - Devices industry, with a market capitalization near $2.37B, listed on NASDAQ, employing roughly 728 people, carrying a beta of 1.88 to the broader market. TransMedics Group, Inc. Led by Waleed H. Hassanein, public since 2019-05-02.
Short volume measures the number of shares sold short on a given day as reported by FINRA. Tracking short volume relative to total volume helps identify unusual bearish sentiment or short-squeeze potential.
- Latest Date
- 2026-06-30
- Short Volume
- 264.5K
- Total Volume
- 635.4K
- Short %
- 41.63%
- 30-Day Avg Short %
- 60.95%
Showing 30 days of FINRA short volume data for TransMedics Group, Inc..
Learn how short volume is reported and how to read the data →
TMDX most-active contracts
| Type | Strike | Expiration | Volume | OI | IV | Bid | Ask |
|---|---|---|---|---|---|---|---|
| PUT | $65.00 | Jul 17, 2026 | 34 | 3.3K | 64.3% | $2.75 | $3.40 |
| PUT | $70.00 | Jul 17, 2026 | 18 | 2.9K | 62.7% | $5.50 | $6.20 |
Top 2 contracts from the institutional-grade nightly options scan; ranked by volume within the broader S&P 500/400/600 + ETF universe.
Frequently asked TMDX short volume questions
- What is the daily TMDX short volume?
- As of Jun 30, 2026, TransMedics Group, Inc. (TMDX) short volume is 264.5K shares against 635.4K total reported volume, or 41.63% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is TMDX short volume reported?
- FINRA publishes the Daily Short Sale Volume File for trades reported to FINRA TRFs and the FINRA/Nasdaq ADF on a T+1 basis. The headline figure is the count of shares that printed at the short-sale or short-exempt tick across all reporting venues for the symbol; each exchange separately publishes its own daily short-sale data file.
- What does TMDX short volume tell options traders?
- Daily short-sale flow is one input that helps disambiguate dealer-hedging activity from directional bear flow when the chain shows fresh customer call inventory. It is not a clean MM-only proxy: the headline number mixes directional shorting, options-MM delta-hedging, ETF-creation arbitrage, and convertible-arb hedging. Cross-check against gamma-exposure and OI changes for a cleaner read.