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 | EXERCISE | $100K–$500K | 10K | $16.14 | Dec 5, 2022 |
| Lovell Stephanie | Director | EXERCISE | $100K–$500K | 11K | $45.57 | Nov 23, 2022 |
| Lovell Stephanie | Director | SELL | $500K+ | 11K | $58.80 | Nov 23, 2022 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $1K–$15K | 4K | $2.21 | Nov 16, 2022 |
| Khayal Tamer I | Chief Commercial O… | SELL | $100K–$500K | 4K | $60.06 | Nov 16, 2022 |
| Hassanein Waleed H | President & CEO | SELL | $500K+ | 14K | $60.13 | Nov 16, 2022 |
| Khayal Tamer I | Chief Commercial O… | SELL | $100K–$500K | 3K | $60.03 | Nov 15, 2022 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $1K–$15K | 3K | $2.21 | Nov 15, 2022 |
| Weill David | Director | SELL | $1M+ | 22K | $56.00 | Nov 15, 2022 |
| Weill David | Director | EXERCISE | $100K–$500K | 22K | $16.00 | Nov 15, 2022 |
| Hassanein Waleed H | President & CEO | SELL | $100K–$500K | 3K | $60.03 | Nov 15, 2022 |
| Khayal Tamer I | Chief Commercial O… | SELL | $100K–$500K | 3K | $60.04 | Nov 9, 2022 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $1K–$15K | 3K | $2.21 | Nov 9, 2022 |
| Gordon Stephen | CFO | SELL | $500K+ | 10K | $56.72 | Nov 9, 2022 |
| Gordon Stephen | CFO | EXERCISE | $100K–$500K | 10K | $15.13 | Nov 9, 2022 |
| Hassanein Waleed H | President & CEO | SELL | $100K–$500K | 3K | $60.07 | Nov 9, 2022 |
| Carey John F | VP of Operations | SELL | $100K–$500K | 3K | $49.03 | Nov 4, 2022 |
| Carey John F | VP of Operations | EXERCISE | <$1K | 3K | $0.28 | Nov 4, 2022 |
| Gordon Stephen | CFO | EXERCISE | $15K–$50K | 10K | $2.21 | Oct 4, 2022 |
| Gordon Stephen | CFO | SELL | $100K–$500K | 10K | $41.74 | Oct 4, 2022 |
| Carey John F | VP of Operations | EXERCISE | $1K–$15K | 3K | $0.78 | Oct 4, 2022 |
| Carey John F | VP of Operations | SELL | $100K–$500K | 3K | $42.09 | Oct 4, 2022 |
| Hassanein Waleed H | President & CEO | SELL | $1M+ | 20K | $55.33 | Sep 9, 2022 |
| Carey John F | VP of Operations | SELL | $100K–$500K | 3K | $51.09 | Sep 2, 2022 |
| Carey John F | VP of Operations | EXERCISE | $1K–$15K | 3K | $2.21 | Sep 2, 2022 |
| Gordon Stephen | CFO | EXERCISE | $15K–$50K | 10K | $2.21 | Sep 2, 2022 |
| Gordon Stephen | CFO | SELL | $500K+ | 10K | $50.93 | Sep 2, 2022 |
| Hassanein Waleed H | President & CEO | SELL | $1M+ | 20K | $50.06 | Aug 25, 2022 |
| Khayal Tamer I | Chief Commercial O… | SELL | $1M+ | 20K | $50.08 | Aug 25, 2022 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $15K–$50K | 10K | $2.21 | Aug 25, 2022 |
| Hassanein Waleed H | President & CEO | SELL | $500K+ | 20K | $47.18 | Aug 15, 2022 |
| Khayal Tamer I | Chief Commercial O… | SELL | $500K+ | 20K | $45.12 | Aug 9, 2022 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $15K–$50K | 10K | $2.21 | Aug 9, 2022 |
| Hassanein Waleed H | President & CEO | SELL | $500K+ | 20K | $45.13 | Aug 9, 2022 |
| Gordon Stephen | CFO | EXERCISE | $15K–$50K | 10K | $2.21 | Aug 9, 2022 |
| Gordon Stephen | CFO | SELL | $100K–$500K | 10K | $48.09 | Aug 9, 2022 |
| Carey John F | VP of Operations | EXERCISE | $15K–$50K | 7K | $5.44 | Aug 2, 2022 |
| Carey John F | VP of Operations | SELL | $100K–$500K | 7K | $40.55 | Aug 2, 2022 |
| TOBIN JAMES R | Director | SELL | $1M+ | 49K | $39.98 | Aug 2, 2022 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $15K–$50K | 14K | $1.40 | Aug 2, 2022 |
| Khayal Tamer I | Chief Commercial O… | SELL | $500K+ | 14K | $40.01 | Aug 2, 2022 |
| Carey John F | VP of Operations | SELL | $50K–$100K | 2K | $34.57 | Jul 22, 2022 |
| Carey John F | VP of Operations | EXERCISE | $15K–$50K | 2K | $13.99 | Jul 22, 2022 |
| Carey John F | VP of Operations | EXERCISE | $15K–$50K | 2K | $16.14 | Jul 12, 2022 |
| Carey John F | VP of Operations | SELL | $15K–$50K | 2K | $32.98 | Jul 12, 2022 |
| Gordon Stephen | CFO | EXERCISE | $15K–$50K | 10K | $2.21 | Jul 6, 2022 |
| Gordon Stephen | CFO | SELL | $100K–$500K | 10K | $35.00 | Jul 6, 2022 |
| TOBIN JAMES R | Director | SELL | $1M+ | 49K | $35.00 | Jul 6, 2022 |
| Khayal Tamer I | Chief Commercial O… | EXERCISE | $1K–$15K | 14K | $0.28 | Jul 6, 2022 |
| Khayal Tamer I | Chief Commercial O… | SELL | $100K–$500K | 14K | $35.06 | Jul 6, 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