TMDX
TransMedics Group, Inc.
Electromedical & Electrotherapeutic ApparatusNasdaqLarge accelerated filer
Total Trades
213
Buys
2
Sells
124
Largest Trade
N/A
Insiders
13
Institutional Funds
352
Inst. Value
$1M+
Activist Filings
16
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Gordon Stephen | CFO | SELL | $100K–$500K | 5K | $79.05 | May 2, 2023 |
| Hassanein Waleed H | President & CEO | SELL | $500K+ | 8K | $78.13 | May 2, 2023 |
| Khayal Tamer I | Chief Commercial O… | SELL | $1M+ | 15K | $86.99 | Apr 25, 2023 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $100K–$500K | 12K | $16.14 | Apr 25, 2023 |
| Hassanein Waleed H | President & CEO | SELL | $500K+ | 8K | $74.83 | Apr 4, 2023 |
| Hassanein Waleed H | President & CEO | SELL | $500K+ | 8K | $80.72 | Mar 2, 2023 |
| Gordon Stephen | CFO | EXERCISE | $50K–$100K | 5K | $16.14 | Mar 2, 2023 |
| Gordon Stephen | CFO | SELL | $100K–$500K | 5K | $79.51 | Mar 2, 2023 |
| Khayal Tamer I | Chief Commercial O… | SELL | $1M+ | 15K | $80.12 | Mar 2, 2023 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $100K–$500K | 10K | $16.14 | Mar 2, 2023 |
| Basile Edward M | Director | SELL | $100K–$500K | 4K | $80.10 | Mar 2, 2023 |
| Weill David | Director | SELL | $100K–$500K | 6K | $76.69 | Feb 28, 2023 |
| Weill David | Director | EXERCISE | $50K–$100K | 6K | $14.20 | Feb 28, 2023 |
| Basile Edward M | Director | SELL | $100K–$500K | 5K | $78.06 | Feb 28, 2023 |
| Hassanein Waleed H | President & CEO | SELL | $1M+ | 38K | $73.65 | Feb 28, 2023 |
| TOBIN JAMES R | Director | SELL | $500K+ | 10K | $75.13 | Feb 28, 2023 |
| Khayal Tamer I | Chief Commercial O… | SELL | $1M+ | 36K | $73.51 | Feb 28, 2023 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $500K+ | 36K | $16.01 | Feb 28, 2023 |
| Khayal Tamer I | Chief Commercial O… | SELL | $100K–$500K | 4K | $70.15 | Feb 16, 2023 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $50K–$100K | 4K | $16.00 | Feb 16, 2023 |
| Hassanein Waleed H | President & CEO | SELL | $100K–$500K | 2K | $70.08 | Feb 16, 2023 |
| Carey John F | VP of Operations | EXERCISE | $15K–$50K | 1K | $16.88 | Feb 3, 2023 |
| Carey John F | VP of Operations | SELL | $50K–$100K | 1K | $63.14 | Feb 3, 2023 |
| Hassanein Waleed H | President & CEO | SELL | $100K–$500K | 8K | $64.21 | Feb 3, 2023 |
| Gordon Stephen | CFO | SELL | $100K–$500K | 5K | $62.64 | Feb 3, 2023 |
| Gordon Stephen | CFO | EXERCISE | $50K–$100K | 5K | $16.14 | Feb 3, 2023 |
| Hassanein Waleed H | President & CEO | SELL | $500K+ | 12K | $65.42 | Jan 25, 2023 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $50K–$100K | 3K | $16.00 | Jan 25, 2023 |
| Khayal Tamer I | Chief Commercial O… | SELL | $100K–$500K | 3K | $65.07 | Jan 25, 2023 |
| Hassanein Waleed H | President & CEO | SELL | $100K–$500K | 8K | $65.17 | Jan 20, 2023 |
| Khayal Tamer I | Chief Commercial O… | SELL | $100K–$500K | 7K | $65.19 | Jan 20, 2023 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $100K–$500K | 7K | $16.00 | Jan 20, 2023 |
| Gordon Stephen | CFO | SELL | $100K–$500K | 5K | $60.12 | Jan 18, 2023 |
| Gordon Stephen | CFO | EXERCISE | $50K–$100K | 5K | $16.14 | Jan 18, 2023 |
| Hassanein Waleed H | President & CEO | SELL | $100K–$500K | 8K | $64.14 | Jan 18, 2023 |
| Carey John F | VP of Operations | SELL | $50K–$100K | 1K | $62.71 | Jan 18, 2023 |
| Carey John F | VP of Operations | EXERCISE | $50K–$100K | 1K | $38.46 | Jan 18, 2023 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $50K–$100K | 6K | $16.00 | Jan 17, 2023 |
| Khayal Tamer I | Chief Commercial O… | SELL | $100K–$500K | 6K | $60.20 | Jan 17, 2023 |
| Khayal Tamer I | Chief Commercial O… | SELL | $100K–$500K | 4K | $61.85 | Jan 5, 2023 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $50K–$100K | 4K | $16.00 | Jan 5, 2023 |
| DAMME LAURA | VP, Clinical Affairs | EXERCISE | $100K–$500K | 11K | $38.46 | Dec 16, 2022 |
| DAMME LAURA | VP, Clinical Affairs | SELL | $500K+ | 11K | $60.87 | Dec 16, 2022 |
| Provost Miriam | VP | EXERCISE | $100K–$500K | 6K | $38.46 | Dec 15, 2022 |
| Provost Miriam | VP | SELL | $100K–$500K | 4K | $62.53 | Dec 15, 2022 |
| Provost Miriam | VP | SELL | $100K–$500K | 4K | $59.00 | Dec 13, 2022 |
| Provost Miriam | VP | EXERCISE | $100K–$500K | 8K | $23.28 | Dec 13, 2022 |
| Carey John F | VP of Operations | SELL | $500K+ | 13K | $62.99 | Dec 5, 2022 |
| Carey John F | VP of Operations | EXERCISE | $100K–$500K | 26K | $14.92 | Dec 5, 2022 |
| Gordon Stephen | CFO | SELL | $500K+ | 10K | $61.30 | Dec 5, 2022 |
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Institutional Ownership
13F filings as of Dec 31, 2025 · 352 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| STATE STREET CORP | 1.3M | $1M+ | SH |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 832K | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 707K | $1M+ | SH |
| EVENTIDE ASSET MANAGEMENT, LLC | 548K | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 461K | $1M+ | SH |
| EMERALD ADVISERS, LLC | 351K | $1M+ | SH |
| WASATCH ADVISORS LP | 332K | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 323K | $1M+ | SH |
| BRAIDWELL LP | 315K | $1M+ | SH |
| ROYCE & ASSOCIATES LP | 243K | $1M+ | SH |
| EMERALD MUTUAL FUND ADVISERS TRUST | 230K | $1M+ | SH |
| Capital World Investors | 227K | $1M+ | SH |
| ZEVENBERGEN CAPITAL INVESTMENTS LLC | 219K | $1M+ | SH |
| LORD, ABBETT & CO. LLC | 211K | $1M+ | SH |
| BNP PARIBAS FINANCIAL MARKETS | 210K | $1M+ | SH |
| BARCLAYS PLC | 200K | $1M+ | SH |
| PRINCIPAL FINANCIAL GROUP INC | 192K | $1M+ | SH |
| ArrowMark Colorado Holdings LLC | 187K | $1M+ | SH |
| DAVIDSON KEMPNER CAPITAL MANAGEMENT LP | 146K | $1M+ | SH |
| BROWN CAPITAL MANAGEMENT LLC | 146K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Jul 18, 2025
14.6%
5.0M shares
SC 13G/A · May 12, 2025
15.0%
5.1M shares
SC 13G/A · Dec 6, 2024
12.9%
4.4M shares
SC 13G/A · Oct 7, 2024
15.9%
5.3M shares
SC 13G/A · Oct 7, 2024
6.6%
2.2M shares
SC 13G/A · Oct 4, 2024
10.8%
3.6M shares
SC 13G/A · Feb 14, 2024
4.7%
1.5M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
5.7%
1.9M shares
SC 13G/A · Jan 25, 2024
7.8%
2.6M shares
SC 13G/A · Feb 14, 2023
6.1%
1.9M shares
SC 13G/A · Feb 10, 2023
3.8%
1.2M shares
SC 13G/A · Feb 3, 2023
7.2%
2.3M shares
SC 13G/A · Feb 2, 2023
3.2%
1.0M shares
SC 13G/A · Feb 14, 2022
5.5%
1.5M shares
SC 13G · Feb 14, 2022
6.0%
1.7M shares
SC 13G · Feb 11, 2022
6.5%
1.8M shares