Transmedics Group Inc
$92.22-1.5%
+$272.2M
Net Activity
+7.36% total shares
Institutions Holding
380
Popularity Rank
#1619
Avg Weight
0.07%
Total Value
$2.5B
Market Cap
$3.7B
380 institutions currently hold TMDX, with 210 net buyers and 227 net sellers this quarter.
Institutional Moves (Q2 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
227
Net Buying Institutions
210
Top 5 by Value
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Across its top 20 institutional holders, TMDX's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 5/100, avg. turnover score 37/100).
TMDX ranks #1619 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
TMDX is a top-conviction position for FirstWave Capital Management LLC — at 5.6% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
The largest dollar stake in TMDX belongs to BlackRock, Inc., but the position matters far more to FirstWave Capital Management LLC, who has 5.6% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.
California State Teachers Retirement System has added to its TMDX position for two straight quarters, increasing it by $36.1M to reach $39.9M today.
BlackRock has trimmed its TMDX position for two straight quarters, cutting it by $284.6M while still holding $371.7M.
TMDX is down 1.5% today, but institutions show net buying of $272.2M this quarter — a divergence between today's price move and the underlying institutional flow.
TMDX posted net income of $151.7M over the trailing twelve months, and currently trades at a P/E of 24.6.
+$531.9M
Total Buy Value
$378.0M
Total Sell Value
210
Net Buyers
227
Net Sellers
TMDX
Q2 2026
Top 5 Institutional Movers
TMDX does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
1
Filings (90d)
$722K
Total Est. Value
10K shares
Planned Shares
| Filer | Filing Date | Est. Value |
|---|---|---|
| Gunderson Thomas J. | 2026-06-15 | $722K |
Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。
No Schedule 13D/13G filings for this ticker
1
Filings (14d)
TransMedics Group issued a press release on August 4, 2026, announcing its financial results for the quarter ended June 30, 2026. This 8-K filing simply attaches that press release as Exhibit 99.1 and does not contain any specific numbers or details—those are all in the release itself. The filing is marked as "furnished" rather than "filed," meaning it is not subject to Section 18 liability under the Exchange Act.
View Full Filing (SEC EDGAR)89377M109
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Access TMDX's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/TMDXCLI
npx alphasmo stocks get TMDX