Institutional shares held 32.1 Million
852K calls
690K puts
Total value of holdings $4.55B
$121M calls
$98M puts
Market Cap $4.52B
31,831,400 Shares Out.
Institutional ownership 100.8%
# of Institutions 338


Latest Institutional Activity in TMDX

Top Purchases

Q1 2025
Ubs Asset Management Americas Inc Shares Held: 3.11M ($442M)
Q1 2025
Hood River Capital Management LLC Shares Held: 796K ($113M)
Q1 2025
Brown Capital Management LLC Shares Held: 468K ($66.5M)
Q1 2025
Citadel Advisors LLC Shares Held: 610K ($86.6M)
Q1 2025
Wellington Management Group LLP Shares Held: 291K ($41.3M)

Top Sells

Q1 2025
Voloridge Investment Management, LLC Shares Held: 24.4K ($3.46M)
Q1 2025
Arrow Mark Colorado Holdings LLC Shares Held: 35.6K ($5.06M)
Q1 2025
Invesco Ltd. Shares Held: 444K ($63M)
Q1 2025
Sandhill Capital Partners LLC Shares Held: 3.63K ($515K)
Q1 2025
Susquehanna International Group, LLP Shares Held: 91K ($12.9M)

About TMDX

TransMedics Group, Inc., a commercial-stage medical technology company, engages in transforming organ transplant therapy for end-stage organ failure patients in the United States and internationally. The company offers Organ Care System (OCS), a portable organ perfusion, optimization, and monitoring system that utilizes its proprietary and customized technology to replicate near-physiologic conditions for donor organs outside of the human body. Its Organ Care System includes OCS LUNG for the preservation of standard criteria donor lungs for double-lung transplantation; OCS Heart, a technology for extracorporeal perfusion and preservation of donor hearts; and OCS Liver for the preservation of donor livers. The company was founded in 1998 and is headquartered in Andover, Massachusetts.


Insider Transactions at TMDX

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
279K Shares
From 18 Insiders
Grant, award, or other acquisition 127K shares
Exercise of conversion of derivative security 135K shares
Bona fide gift 18K shares
Sell / Disposition
177K Shares
From 8 Insiders
Open market or private sale 159K shares
Bona fide gift 18K shares

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