TransMedics
TMDX
81.07
+0.79
+0.98%
TransMedics
US · TMDX
#2536 by market cap
Listed 2019
81.07
+0.79
+0.98%
Live - 5344 symbols - heartbeat 57s ago
· 2026-10-08 07:00
Pre-market
81.15
+0.10%
After-hours
81.07
0.00%
Overnight
80.22
-1.05%
- Market cap
- 2.81B
- P/E (TTM)i
- 21.00
- P/Bi
- 5.43
- EPSi
- 4.87
- Div yieldi
- 0.00%
- 52W posi
- 22%
Reader sentiment
Are you bullish or bearish on TMDX?
Anonymous reader poll. Unscientific, not investment advice.
✦ Quant Ownership Signal how this is computed
Accumulating
- The number of reporting institutions decreased by 2 in the most recent period (2026/Q3).
- Total institutional ownership rose 0.2 percentage points.
Institutional ownership
- Held by institutions
- 102.63% +0.24pp
- Institutions
- 444 -2
- As of
- 2026/Q3 vs. prior period
Ownership vs. money flow
DivergingInstitutions added shares last reporting period, and the stock has seen net outflows in main-fund flow over the last 20 trading sessions - the two are pointing in different directions.
Institutional ownership changes are reported quarterly with a lag; fund-flow data is daily. Treat this as a directional cross-check, not a precise timing signal.
Holder types
Mutual Fund85.81%
Hedge Fund7.27%
Public Company5.59%
Individual/Insider3.19%
Private Company2.23%
Government Pension Fund1.07%
Insurance Company0.35%
Family Office/Trust0.18%
Top holders as of 2026-06-30
BlackRock
16.14% · 5.60M sh
FMR
14.80% · 5.13M sh
Vanguard Portfolio Management, LLC
5.58% · 1.93M sh
Vanguard Capital Management, LLC
5.03% · 1.74M sh
State Street Global Advisors
4.10% · 1.42M sh
Macquarie Investment Management Business Trust
2.63% · 910.50K sh
Geode Capital Management, LLC
2.58% · 894.91K sh
UBS Asset Management
2.56% · 886.31K sh
Emerald Advisers, LLC
2.29% · 792.57K sh
Hood River Capital Management LLC
2.17% · 751.13K sh
Bar length is relative to the largest holder shown here, not to 100% of the company.
Insiders
50 filings tracked · 29 buys · 20 sells
| Name | Role | Stake |
|---|---|---|
| Waleed Hassanein | Chief Executive Officer | 1.63% |
| Edwin Kania | Independent Director | 0.89% |
| James Tobin | Independent Chairperson | 0.46% |
| Tamer Khayal | Chief Commercial Officer | 0.04% |
| Nicholas Corcoran | Senior Vice President of Supply Chain & Operations | 0.04% |
| Thomas Gunderson | Independent Director | 0.04% |
| David Weill | Independent Director | 0.04% |
| Anil Ranganath | Senior Vice President | 0.01% |
| Merilee Raines | Independent Director | 0.01% |
| Gerardo Hernandez | Chief Financial Officer | 0.01% |
Insider transactions most recent Form 4 filings
| Date | Name | Role | Type | Shares | Price |
|---|---|---|---|---|---|
| 2026-09-10 | David Weill | Independent Director | Open Market Acquisition | +1,336 | $81.63 |
| 2026-08-16 | James Tobin | Independent Chairperson | Other Disposition | -18,000 | -- |
| 2026-07-09 | Waleed Hassanein | Chief Executive Officer | Other Acquisition | +49,669 | -- |
| 2026-07-09 | Waleed Hassanein | Chief Executive Officer | Other Derivative Acquisition | +112,984 | $71.23 |
| 2026-07-09 | Nicholas Corcoran | Senior Vice President of Supply Chain & Operations | Other Acquisition | +11,727 | -- |
| 2026-07-09 | Nicholas Corcoran | Senior Vice President of Supply Chain & Operations | Other Derivative Acquisition | +17,784 | $71.23 |
| 2026-07-09 | Gerardo Hernandez | Chief Financial Officer | Other Acquisition | +17,246 | -- |
| 2026-07-09 | Gerardo Hernandez | Chief Financial Officer | Other Derivative Acquisition | +26,153 | $71.23 |
| 2026-06-14 | Thomas Gunderson | Independent Director | Derivative Exercise and Sale | -9,624 | $2.21–75.06 |
| 2026-06-14 | Thomas Gunderson | Independent Director | Derivative Exercise and Retained | +9,661 | $2.21 |
| 2026-05-19 | Edwin Kania | Independent Director | Other Acquisition | +2,922 | -- |
| 2026-05-19 | Merilee Raines | Independent Director | Other Acquisition | +2,922 | -- |
| 2026-05-19 | James Tobin | Independent Chairperson | Other Acquisition | +2,922 | -- |
| 2026-05-19 | Edward Basile | Independent Director | Other Acquisition | +2,922 | -- |
| 2026-05-19 | Stephanie Lovell | Independent Director | Other Acquisition | +2,922 | -- |
| 2026-05-19 | Thomas Gunderson | Independent Director | Other Acquisition | +2,922 | -- |
| 2026-05-19 | David Weill | Independent Director | Other Acquisition | +2,922 | -- |
| 2026-05-18 | Matthew Forsyth | SVP, General Counsel & Corporate Secretary | Other Acquisition | +15,409 | -- |
| 2026-05-18 | Matthew Forsyth | SVP, General Counsel & Corporate Secretary | Other Derivative Acquisition | +23,171 | $66.13 |
| 2026-03-03 | Stephanie Lovell | Independent Director | Open Market Disposition | -1,193 | $149.62 |
Form 4 filings, most recent per company. "Other Derivative Acquisition" rows are mostly RSU/option vesting, not open-market buying - the Type column says which.
Quote time 2026-10-08 07:00:00 · For reference only, not investment advice and not tailored to your situation.