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 |
|---|---|---|---|---|---|---|
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $50K–$100K | 3K | $33.13 | Jun 5, 2024 |
| Gordon Stephen | CFO | EXERCISE | $500K+ | 18K | $39.15 | May 31, 2024 |
| Gordon Stephen | CFO | SELL | $1M+ | 20K | $141.40 | May 31, 2024 |
| Weill David | Director | SELL | $100K–$500K | 1K | $141.65 | May 31, 2024 |
| TOBIN JAMES R | Director | SELL | $1M+ | 15K | $106.43 | May 3, 2024 |
| Hassanein Waleed H | President & CEO | EXERCISE | $500K+ | 56K | $13.28 | May 3, 2024 |
| Hassanein Waleed H | President & CEO | SELL | $1M+ | 68K | $116.68 | May 3, 2024 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $1M+ | 48K | $37.89 | May 3, 2024 |
| Khayal Tamer I | Chief Commercial O… | SELL | $1M+ | 78K | $109.78 | May 3, 2024 |
| Hassanein Waleed H | President & CEO | SELL | $100K–$500K | 4K | $95.12 | Apr 18, 2024 |
| Hassanein Waleed H | President & CEO | EXERCISE | $50K–$100K | 4K | $13.28 | Apr 18, 2024 |
| Hassanein Waleed H | President & CEO | EXERCISE | $100K–$500K | 12K | $13.28 | Apr 12, 2024 |
| Hassanein Waleed H | President & CEO | SELL | $1M+ | 12K | $95.09 | Apr 12, 2024 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $100K–$500K | 20K | $24.18 | Apr 10, 2024 |
| Khayal Tamer I | Chief Commercial O… | SELL | $1M+ | 20K | $90.35 | Apr 10, 2024 |
| Khayal Tamer I | Chief Commercial O… | SELL | $500K+ | 10K | $80.21 | Apr 5, 2024 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $100K–$500K | 10K | $14.11 | Apr 5, 2024 |
| Gordon Stephen | CFO | EXERCISE | $500K+ | 15K | $38.46 | Apr 2, 2024 |
| Gordon Stephen | CFO | SELL | $1M+ | 15K | $74.01 | Apr 2, 2024 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $50K–$100K | 3K | $16.09 | Feb 21, 2024 |
| Khayal Tamer I | Chief Commercial O… | SELL | $100K–$500K | 3K | $90.00 | Feb 21, 2024 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $50K–$100K | 4K | $16.00 | Feb 16, 2024 |
| Khayal Tamer I | Chief Commercial O… | SELL | $100K–$500K | 4K | $90.02 | Feb 16, 2024 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $1K–$15K | 736 | $16.00 | Feb 9, 2024 |
| Khayal Tamer I | Chief Commercial O… | SELL | $50K–$100K | 736 | $90.09 | Feb 9, 2024 |
| Basile Edward M | Director | SELL | $500K+ | 7K | $86.38 | Feb 8, 2024 |
| Gordon Stephen | CFO | SELL | $1M+ | 15K | $85.45 | Feb 2, 2024 |
| Gordon Stephen | CFO | EXERCISE | $100K–$500K | 15K | $18.21 | Feb 2, 2024 |
| Khayal Tamer I | Chief Commercial O… | SELL | $100K–$500K | 2K | $90.09 | Jan 25, 2024 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $15K–$50K | 2K | $16.00 | Jan 25, 2024 |
| Khayal Tamer I | Chief Commercial O… | SELL | $500K+ | 10K | $80.41 | Jan 18, 2024 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $100K–$500K | 10K | $13.28 | Jan 18, 2024 |
| Gordon Stephen | CFO | SELL | $1M+ | 15K | $77.07 | Jan 3, 2024 |
| Gordon Stephen | CFO | EXERCISE | $100K–$500K | 15K | $13.28 | Jan 3, 2024 |
| TOBIN JAMES R | Director | SELL | $500K+ | 10K | $70.14 | Nov 29, 2023 |
| Hassanein Waleed H | President & CEO | SELL | $500K+ | 15K | $64.32 | Nov 10, 2023 |
| Gordon Stephen | CFO | EXERCISE | $50K–$100K | 5K | $16.14 | Oct 4, 2023 |
| Gordon Stephen | CFO | SELL | $100K–$500K | 5K | $54.22 | Oct 4, 2023 |
| Hassanein Waleed H | President & CEO | SELL | $500K+ | 8K | $68.26 | Sep 6, 2023 |
| Provost Miriam | VP | SELL | $100K–$500K | 3K | $66.52 | Sep 5, 2023 |
| Provost Miriam | VP | EXERCISE | $100K–$500K | 5K | $26.98 | Sep 5, 2023 |
| Weill David | Director | BUY | $100K–$500K | 3K | $62.00 | Aug 30, 2023 |
| Hassanein Waleed H | President & CEO | SELL | $500K+ | 8K | $93.06 | Aug 4, 2023 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $100K–$500K | 5K | $22.66 | Jul 19, 2023 |
| Khayal Tamer I | Chief Commercial O… | SELL | $100K–$500K | 5K | $95.37 | Jul 19, 2023 |
| Khayal Tamer I | Chief Commercial O… | SELL | $100K–$500K | 5K | $90.04 | Jul 17, 2023 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $15K–$50K | 3K | $16.14 | Jul 17, 2023 |
| Hassanein Waleed H | President & CEO | SELL | $500K+ | 8K | $82.51 | Jul 6, 2023 |
| Hassanein Waleed H | President & CEO | SELL | $500K+ | 8K | $71.64 | Jun 5, 2023 |
| Gordon Stephen | CFO | EXERCISE | $50K–$100K | 5K | $16.14 | May 2, 2023 |
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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