Key facts
- This page summarizes Thomas J. Gunderson's Form 4 filing for TransMedics Group, Inc. (TMDX).
- 3 reported transactions and 1 derivative row are listed below.
- Accepted by SEC: 17 Jun 2026, 16:15.
Thomas J. Gunderson - 15 Jun 2026 Form 4 Insider Report for TransMedics Group, Inc. (TMDX)
- Reporting relationship
- Director
- Issuer ticker
- TMDX
- Reported as of
- 15 Jun 2026
- Net transaction value
- -$722,377
- SEC form
- 4
- Accepted by SEC
- 17 Jun 2026, 16:15:04 UTC
- Prior SEC filing
- 21 May 2026
- Source filing
- View source filing
- Reporting owner signature
- By: /s/ Gerardo Hernandez, Attorney-in-Fact
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Thomas J. Gunderson filed Form 4 for TransMedics Group, Inc. (TMDX) on 17 Jun 2026.
Change
- Previous filing in this sequence was filed on 21 May 2026.
- Current net transaction value: -$722,377.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001708144
Primary reporting owner
Gunderson Thomas J.
- Relationship
- Director
- Address
- C/O TRANSMEDICS GROUP, INC., 200 MINUTEMAN ROAD, ANDOVER
- Signature
- By: /s/ Gerardo Hernandez, Attorney-in-Fact
- Signature date
- 17 Jun 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
TMDX
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +19,285
- Change %
- +276%
- Price
- $2.21*
- Shares after
- 26,266
- Date
- 15 Jun 2026
- Ownership
- Direct
TMDX
transaction
Common Stock
Sale
- Transaction value
- $722,377
- Shares
- -9,624
- Change %
- -37%
- Price
- $75.06
- Shares after
- 16,642
- Date
- 15 Jun 2026
- Ownership
- Direct
- Footnotes
- F1
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
TMDX
transaction
Derivative
Stock Option (Right to Buy)
Options Exercise
- Transaction value
- Shares
- -19,285
- Change %
- -100%
- Price
- $0.000000*
- Shares after
- 0
- Date
- 15 Jun 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 19,285
- Exercise price
- $2.21
- Footnotes
- F2
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 2 footnotes
Footnote F1
The shares were sold to cover the exercise price and applicable tax withholding obligations in connection with the exercise of the stock options.
Footnote F2
The stock options were granted on August 1, 2016 and are fully vested.