TransMedics Group, Inc.

TMDX • NASDAQ

TransMedics Group, Inc. is a medical - devices company in the healthcare sector on NASDAQ, led by Waleed Hassanein, M.D., with a market cap of $4.3B. As of Q3 2025, 111% of shares are held by 379 institutional investors, with BlackRock, Inc. as the largest holder at 15.64%.

CEOWaleed Hassanein, M.D.

Market Cap$4.3B

Medical - Devices

Healthcare

Employees584.0

Websitetransmedics.com

Country

United States of America

Overview

Overview of institutional ownership in TMDX as of Q3 2025 with a market cap of $3.8B

All Institutions

Institutions: 379
Value Held: $4.2B
Shares Held: 37.6M
Avg Position: $11.2M
Median Position: $693.1K

Hedge Funds

Hedge Funds: 46
Value Held: $414.4M
Shares Held: 3.7M
Avg Position: $9.0M
Median Position: $1.5M

Ownership Breakdown

Institutional (non-HF)

99.9%

$3.8B

Hedge Funds

10.83%

$414.4M

Retail & Other

Based on market cap of $3.8B as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in TMDX as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
B BlackRock, Inc. Institution	-	$598.2M 0.01% of portfolio	15.64% 5.3M shares	Q2 2019 Held for 6y 5m	$5.67T
FMR LLC Institution	-	$568.2M 0.03% of portfolio	14.86% 5.1M shares	Q2 2019 Held for 6y 5m	$1.92T
VANGUARD GROUP INC Institution	Salim Ramji CEO	$404.5M 0.01% of portfolio	10.58% 3.6M shares	Q2 2019 Held for 6y 5m	$6.69T
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$143.6M 0.00% of portfolio	3.75% 1.3M shares	Q2 2019 Held for 6y 5m	$2.88T
UBS GLOBAL ASSET MANAGEMENT AMERICAS INC Long Only Manager	James Poucher CEO	$120.0M 0.03% of portfolio	3.14% 1.1M shares	Q2 2021 Held for 4y 5m	$460.61B
M MACQUARIE GROUP LTD Institution	-	$101.7M 0.12% of portfolio	2.66% 906.3K shares	Q2 2020 Held for 5y 5m	$82.9B
UBS Group AG Institution	Sergio P. Ermotti CEO	$96.1M 0.02% of portfolio	2.51% 856.1K shares	Q2 2019 Held for 6y 5m	$511.54B
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$91.3M 0.01% of portfolio	2.39% 813.6K shares	Q2 2019 Held for 6y 5m	$1.57T
DRIEHAUS CAPITAL MANAGEMENT LLC Hedge Fund•Event Driven	Stephen Thomas Weber CEO	$82.8M 0.59% of portfolio	2.17% 738.2K shares	Q2 2022 Held for 3y 5m	$13.9B
GOLDMAN SACHS GROUP INC Institution	David M. Solomon CEO	$78.9M 0.01% of portfolio	2.06% 703.6K shares	Q1 2020 Held for 5y 8m	$691.34B

Net Capital Flow

Institutional buying and selling activity for TMDX in Q3 2025

Traded: +$82.4M
Buyers: 225
Sellers: 164
Total Bought: +$476.4M
Total Sold: −$394.0M
Avg Position: $9.9M

Biggest Buyers

Institution	Net Bought	Current Position
GOLDMAN SACHS GROUP INC Institution	+$43.4M +386.4K shares	$78.9M 703.6K shares
UBS Group AG Institution	+$42.6M +379.9K shares	$96.1M 856.1K shares
PRICE T ROWE ASSOCIATES INC /MD/ Long Only Manager	+$29.2M +260.3K shares	$44.7M 398.2K shares
TWO SIGMA INVESTMENTS LLC Hedge Fund•Multi-Strategy	+$25.1M +223.4K shares	$71.3M 635.4K shares
TWO SIGMA ADVISERS, LLC Hedge Fund•Multi-Strategy	+$16.6M +147.9K shares	$47.5M 423.3K shares
FRONTIER CAPITAL MANAGEMENT CO LLC Long Only Manager	+$16.4M +146.1K shares	$24.6M 219.5K shares
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant	+$16.3M +145.2K shares	$16.3M 145.2K shares
ZEVENBERGEN CAPITAL INVESTMENTS LLC Long Only Manager	+$15.4M +137.0K shares	$29.0M 258.5K shares
S Squarepoint Ops LLC Hedge Fund•Quant	+$14.0M +125.2K shares	$14.9M 132.5K shares
UBS GLOBAL ASSET MANAGEMENT AMERICAS INC Long Only Manager	+$12.8M +113.8K shares	$120.0M 1.1M shares

Biggest Sellers

Institution	Net Sold	Current Position
F FIL Ltd Institution	−$141.5M −1.1M shares	Sold Off 0 shares
MORGAN STANLEY RIA/Wealth	−$20.8M −185.0K shares	$61.5M 547.8K shares
ExodusPoint Capital Management, LP Hedge Fund•Multi-Strategy	−$18.7M −139.4K shares	Sold Off 0 shares
BROWN CAPITAL MANAGEMENT LLC Long Only Manager	−$15.4M −137.5K shares	$35.2M 313.9K shares
N NEW YORK STATE COMMON RETIREMENT FUND Institution	−$15.1M −134.4K shares	$1.7M 15.2K shares
J JANE STREET GROUP, LLC Institution	−$13.8M −123.0K shares	$8.8M 78.2K shares
DRIEHAUS CAPITAL MANAGEMENT LLC Hedge Fund•Event Driven	−$13.0M −115.9K shares	$82.8M 738.2K shares
R ROYAL BANK OF CANADA Institution	−$11.5M −102.2K shares	$22.3M 198.4K shares
Invesco Ltd. ETF Provider	−$10.2M −90.9K shares	$43.3M 385.8K shares
RAYMOND JAMES FINANCIAL INC RIA/Wealth	−$8.8M −78.4K shares	$12.7M 113.0K shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited TMDX in Q3 2025

New Positions: 36
New Value: $27.7M
Exited Positions: 49
Exited Value: $198.7M

New Positions

Institution	Position Value
PANAGORA ASSET MANAGEMENT INC Hedge Fund•Quant	$8.6M 76.3K shares
NORDEA INVESTMENT MANAGEMENT AB Institution	$4.1M 36.4K shares
Z Zurich Insurance Group Ltd/FI Institution	$2.4M 21.0K shares
Kensington Investment Counsel, LLC RIA/Wealth	$1.9M 17.2K shares
F Fieldview Capital Management, LLC Hedge Fund•Long/Short	$1.7M 15.3K shares
Summit Financial, LLC RIA/Wealth	$1.5M 13.3K shares
SHELTON WEALTH MANAGEMENT, LLC RIA/Wealth	$1.2M 10.4K shares
V VIRGINIA RETIREMENT SYSTEMS ET AL Institution	$740.5K 6.6K shares
B Bryce Point Capital, LLC Hedge Fund•Market Neutral	$687.9K 6.1K shares
Inspire Advisors, LLC RIA/Wealth	$603.4K 5.4K shares

Exited Positions

Institution	Previous Position
F FIL Ltd Institution	$141.5M 1.1M shares
ExodusPoint Capital Management, LP Hedge Fund•Multi-Strategy	$18.7M 139.4K shares
T TWINBEECH CAPITAL LP Hedge Fund•Quant	$5.7M 42.3K shares
BCJ Capital Management, LLC RIA/Wealth	$3.9M 29.3K shares
CAPITAL FUND MANAGEMENT S.A. Hedge Fund•Quant Macro	$3.5M 26.1K shares
EAM Global Investors LLC Long Only Manager	$3.5M 26.0K shares
T TEXAS PERMANENT SCHOOL FUND Institution	$3.0M 22.1K shares
G GF FUND MANAGEMENT CO. LTD. Institution	$2.9M 21.9K shares
Penserra Capital Management LLC ETF Provider	$2.4M 18.1K shares
W Winton Capital Group Ltd Institution	$1.8M 13.4K shares

Options Activity

Institutions with the largest Call and Put options positions in TMDX as of Q3 2025

Call Positions: 17
Call Value: $115.3M
Put Positions: 16
Put Value: $104.8M

Call Positions

Institution	Position Value
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$40.2M 3.6K contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$31.2M 2.8K contracts
J JANE STREET GROUP, LLC Institution	$14.8M 1.3K contracts
W WOLVERINE TRADING, LLC Institution	$8.6M 761.0 contracts
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	$8.1M 726.0 contracts
C Cubist Systematic Strategies, LLC Institution	$2.1M 190.0 contracts
TUDOR INVESTMENT CORP ET AL Hedge Fund•Multi-Strategy	$1.9M 168.0 contracts
D D. E. Shaw & Co., Inc. Institution	$1.8M 159.0 contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	$1.6M 147.0 contracts
P PEAK6 LLC Institution	$1.4M 125.0 contracts

Put Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$39.7M 3.5K contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$27.0M 2.4K contracts
W WOLVERINE TRADING, LLC Institution	$6.9M 613.0 contracts
GOLDMAN SACHS GROUP INC Institution	$6.7M 600.0 contracts
D D. E. Shaw & Co., Inc. Institution	$6.7M 600.0 contracts
J JANE STREET GROUP, LLC Institution	$6.2M 553.0 contracts
C Cubist Systematic Strategies, LLC Institution	$2.3M 208.0 contracts
6 683 Capital Management, LLC Hedge Fund•Long/Short	$2.2M 200.0 contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	$2.1M 186.0 contracts
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	$1.6M 144.0 contracts

Most Committed Institutions

Institutions with TMDX as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
Lagoda Investment Management, L.P. Long Only Manager	Fatima Katarzyna Dickey Managing Partner	6.86% $12.1M	0.32% 108.1K shares	Q1 2023 Held for 2y 8m	$176.7M
M Montanaro Asset Management Ltd Institution	-	3.66% $14.7M	0.38% 130.6K shares	Q2 2021 Held for 4y 5m	$400.4M
B Bastion Asset Management Inc. Institution	-	2.95% $5.1M	0.13% 44.9K shares	Q4 2024 Held for 11 months	$173.7M
B BEACONLIGHT CAPITAL, LLC Institution	-	2.26% $5.0M	0.13% 44.2K shares	Q2 2025 Held for 5 months	$219.4M
B BRAIDWELL LP Hedge Fund•Multi-Strategy	Brian James Kreiter CEO	1.59% $39.4M	1.03% 351.2K shares	Q4 2022 Held for 2y 11m	$2.5B
AH Lisanti Capital Growth, LLC Long Only Manager	Mary Lisanti President	1.56% $6.4M	0.17% 56.9K shares	Q2 2022 Held for 3y 5m	$410.1M
BROWN CAPITAL MANAGEMENT LLC Long Only Manager	Keith Allison Lee CEO	1.45% $35.2M	0.92% 313.9K shares	Q1 2025 Held for 8 months	$2.4B
EMERALD MUTUAL FUND ADVISERS TRUST Long Only Manager	Stacey Lynn Sears President	1.42% $26.8M	0.70% 238.4K shares	Q2 2019 Held for 6y 5m	$1.9B
Bullseye Asset Management LLC Hedge Fund•Long/Short	Jakob Vincent Holm Member	1.41% $2.7M	0.07% 24.1K shares	Q4 2019 Held for 5y 11m	$191.0M
EMERALD ADVISERS INC/PA Long Only Manager	Kenneth George Mertz CEO	1.39% $43.5M	1.14% 387.6K shares	Q2 2019 Held for 6y 5m	$3.1B

Hedge Fund Spotlight

Discover hedge funds investing in TMDX

Bayesian Capital Management, LP

Hedge Fund • Quant

Portfolio ManagerVelin Krassimirov Tzanov

Portfolio Value: $489.3M
Positions: 501
Last Reported: Q3 2025

Sector Allocation

Position in TransMedics Group, Inc.

Market Value: $314.2K
Shares Held: 2.8K
Portfolio Weight: 0.06%
Owned Since: 2025-Q1

Top Holding	Sector	Market Value	Weight
1 Microsoft MSFT	Software - Infrastructure Technology	$6.3M	1.29%
2 Meta Platforms, Inc. META	Internet Content & Information Communication Services	$6.0M	1.23%
3 Boston Scientific BSX	Medical - Devices Healthcare	$5.4M	1.10%