TransMedics Group Ownership & Insider Activity

TransMedics Group (TMDX) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 2.1% of shares outstanding. Institutional investors hold 74.0%. Over the past 90 days, insiders made 1 purchase worth $109K.

Shares Outstanding

34.561M

Shares Float

22.158M

Insider Shares Owned

729.214K

Insider % Owned

2.1%

Institutional Shares Held

25.644M

Institutional % Held

74.0%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

$109K total

Sales (90d)

Net Activity

Net Buying

Net Value (90d)

$109K

TransMedics Group Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Sep 11, 2026	David Weill	—	BUY	1.336K	$81.63	$109K
Jun 15, 2026	Thomas Gunderson	—	SELL-OPTIONS	9.661K	$38.63	$680K