Ticker · CUSIP 89377M109

TMDX

TRANSMEDICS GROUP INC

Healthcare·Medical Devices

···Share

Holders (tracked)

Combined shares

2,375,392

Combined value

$288.97M

Last close

$115.87

Quarter

2025Q4

Price is -4.8% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$115.87+27.63 (+31.31%)H $150.42 · L $87.72 · Avg Vol 949K

Tracked holders · last 8 quarters

Flat over the last 8 quarters.

SEC event timeline

25 events

Wellington Management added2026-02-17
+217,180 shares · 2025Q4
Position
D.E. Shaw & Co. exited2026-02-17
−37,270 shares · 2025Q4
Position
AQR Capital Management trimmed2026-02-17
−3,789 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+11,000 shares · 2025Q4
Position
Ken Griffin (Citadel Advisors) added2026-02-17
+18,330 shares · 2025Q4
Position
Two Sigma Investments trimmed2026-02-17
−199,425 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) added2026-02-17
+100,217 shares · 2025Q4
Position
Steve Cohen (Point72) opened position2026-02-17
+13,000 shares · 2025Q4
Position
T. Rowe Price added2026-02-17
+171,810 shares · 2025Q4
Position
Ray Dalio (Bridgewater Associates) exited2026-02-13
−30,085 shares · 2025Q4
Position
Renaissance Technologies trimmed2026-02-12
−134,900 shares · 2025Q4
Position
Norges Bank (Norway SWF) opened position2026-02-10
+30,574 shares · 2025Q4
Position
Baillie Gifford & Co added2026-01-23
+55,754 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) exited2025-12-09
−123,716 shares · 2025Q3
Position
AQR Capital Management added2025-11-14
+3,629 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) trimmed2025-11-14
−66,100 shares · 2025Q3
Position
Two Sigma Investments added2025-11-14
+223,409 shares · 2025Q3
Position
D.E. Shaw & Co. trimmed2025-11-14
−39,774 shares · 2025Q3
Position
T. Rowe Price added2025-11-14
+260,270 shares · 2025Q3
Position
Wellington Management trimmed2025-11-14
−4,934 shares · 2025Q3
Position
Norges Bank (Norway SWF) exited2025-11-13
−40,274 shares · 2025Q3
Position
Renaissance Technologies opened position2025-11-13
+145,199 shares · 2025Q3
Position
Ray Dalio (Bridgewater Associates) opened position2025-11-13
+30,085 shares · 2025Q3
Position
Norges Bank (Norway SWF) added2025-11-12
+88,206 shares · 2024Q3
Position
Baillie Gifford & Co trimmed2025-10-31
−2,242 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for TMDX →

Follow-the-investor returns

If you'd copied each holder of TMDX…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Baillie Gifford & Co	2021Q1	$68.88	+68.2%	$36.7M
Steve Cohen (Point72)	2020Q2	$90.44	+28.1%	$915K
Steve Cohen (Point72)	2020Q2	$90.44	+28.1%	$915K
T. Rowe Price	2019Q4	$106.49	+8.8%	$66.0M
Renaissance Technologies	2022Q3	$111.40	+4.0%	$1.2M
Ken Griffin (Citadel Advisors)	2019Q3	$113.94	+1.7%	$9.7M
Ken Griffin (Citadel Advisors)	2019Q3	$113.94	+1.7%	$9.7M
Ken Griffin (Citadel Advisors)	2019Q3	$113.94	+1.7%	$9.7M
D.E. Shaw & Co.	2022Q3	$114.62	+1.1%	$591K
Izzy Englander (Millennium Mgmt)	2019Q2	$119.28	-2.9%	$17.3M
Izzy Englander (Millennium Mgmt)	2019Q2	$119.28	-2.9%	$17.3M
AQR Capital Management	2022Q3	$119.31	-2.9%	$557K
Two Sigma Investments	2021Q1	$123.44	-6.1%	$50.5M
Norges Bank (Norway SWF)	2023Q1	$123.64	-6.3%	$3.5M
Paul Tudor Jones (Tudor Investment)	2022Q2	$131.46	-11.9%	$1.3M
Wellington Management	2024Q2	$136.10	-14.9%	$50.2M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions3

Norges Bank (Norway SWF)
+30,574
$3.7M
Steve Cohen (Point72)
+13,000
$1.6M
Paul Tudor Jones (Tudor Investment)
+11,000
$1.3M

Added to5

Wellington Management
+217,180
$26.4M
Izzy Englander (Millennium Mgmt)
+100,217
$12.2M
Baillie Gifford & Co
+55,754
$6.8M
Ken Griffin (Citadel Advisors)
+18,330
$2.2M
T. Rowe Price
+171,810
$21K

Trimmed3

Two Sigma Investments
−199,425
$24.3M
Renaissance Technologies
−134,900
$16.4M
AQR Capital Management
−3,789
$461K

Exited2

D.E. Shaw & Co.
−37,270
$4.2M
Ray Dalio (Bridgewater Associates)
−30,085
$3.4M

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	5	1,956,579	$52.7M	—
2022Q2	9	2,406,170	$75.7M	+4
2022Q3	13	2,924,664	$122.1M	+4
2022Q4	12	3,547,763	$219.0M	-1
2023Q1	15	3,362,531	$254.6M	+3
2023Q2	14	3,075,424	$258.3M	-1
2023Q3	14	3,283,808	$179.8M	—
2023Q4	12	3,563,019	$281.2M	-2
2024Q1	14	3,742,529	$276.7M	+2
2024Q2	17	4,570,909	$688.5M	+3
2024Q3	15	1,750,380	$274.8M	-2
2024Q4	15	1,909,761	$119.1M	—
2025Q1	14	2,124,120	$142.9M	-1
2025Q2	17	2,345,468	$314.3M	+3
2025Q3	16	2,666,596	$299.2M	-1
2025Q4	16	2,375,392	$289.0M	—

Who owns TMDX

16 super-investors · 2025Q4

Tracked stake

2.38M

Combined value

$289M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New4Added8Trim3Sold1

#	Manager	Shares	Value	% of book	Last action
1	T. Rowe Price	570.0K	$69M	0.0%	Added+171.8K
2	Two Sigma Investments	436.0K	$53M	0.1%	Trim−199.4K
3	Wellington Management	433.3K	$53M	0.0%	Added+217.2K
4	Baillie Gifford & Co	316.5K	$38M	0.0%	Added+55.8K
5	Izzy Englander Millennium Mgmt	149.0K	$18M	0.0%	Added+100.2K
6	Ken Griffin Citadel Advisors	143.2K	$17M	0.0%	Added+18.3K
7	Ken Griffin Citadel Advisors	122.8K	$15M	0.0%	Added+18.3K
8	Ken Griffin Citadel Advisors	83.9K	$10M	0.0%	Added+18.3K
9	Izzy Englander Millennium Mgmt	45.9K	$6M	0.0%	Added+100.2K
10	Norges Bank Norway SWF	30.6K	$4M	0.0%	New+30.6K
11	Paul Tudor Jones Tudor Investment	11.0K	$1M	0.0%	New+11.0K
12	Renaissance Technologies	10.3K	$1M	0.0%	Trim−134.9K
13	Steve Cohen Point72	7.9K	$961K	0.0%	New+13.0K
14	D.E. Shaw & Co.	5.1K	$620K	0.0%	Sold−37.3K
15	Steve Cohen Point72	5.1K	$620K	0.0%	New+13.0K
16	AQR Capital Management	4.8K	$585K	0.0%	Trim−3.8K

Recent moves

20 transactions

NEWPaul Tudor Jones (Tudor Investment)
+11,000 · 2025Q4
ADDKen Griffin (Citadel Advisors)
+18,330 · 2025Q4
ADDIzzy Englander (Millennium Mgmt)
+100,217 · 2025Q4
TRIMTwo Sigma Investments
−199,425 · 2025Q4
TRIMAQR Capital Management
−3,789 · 2025Q4
NEWSteve Cohen (Point72)
+13,000 · 2025Q4
SOLDD.E. Shaw & Co.
−37,270 · 2025Q4
ADDWellington Management
+217,180 · 2025Q4
ADDT. Rowe Price
+171,810 · 2025Q4
SOLDRay Dalio (Bridgewater Associates)
−30,085 · 2025Q4
TRIMRenaissance Technologies
−134,900 · 2025Q4
NEWNorges Bank (Norway SWF)
+30,574 · 2025Q4
ADDBaillie Gifford & Co
+55,754 · 2025Q4
SOLDPaul Tudor Jones (Tudor Investment)
−123,716 · 2025Q3
ADDTwo Sigma Investments
+223,409 · 2025Q3
TRIMIzzy Englander (Millennium Mgmt)
−66,100 · 2025Q3
TRIMD.E. Shaw & Co.
−39,774 · 2025Q3
ADDT. Rowe Price
+260,270 · 2025Q3
TRIMWellington Management
−4,934 · 2025Q3
ADDAQR Capital Management
+3,629 · 2025Q3

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