TMDX · Insider trading · 13F holders · Congress trades
TransMedics Group, Inc. (TMDX)
Who is buying and selling TMDX: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 15
- Insider buys, 90 days
- $109K
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
TMDX at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 1 TMDX insider filed 1 open-market purchase worth $109K on SEC Form 4.
- 15 13F filers hold TMDX among their 50 largest positions, worth $117.5M combined. The biggest bets by portfolio weight are FirstWave Capital Management LLC (5.6%), Lagoda Investment Management, L.P. (3.6%) and Bastion Asset Management Inc. (1.7%). In their latest 13Fs, 0 managers opened a new position and 5 added to one.
- No member of Congress has disclosed a trade in TMDX.
- TMDX last closed at $67.12 on Oct 29, 2026.
TMDX insider trading
Between Aug 1, 2026 and Oct 29, 2026, 1 TMDX insider filed 1 open-market purchase worth $109K on SEC Form 4.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Sep 14, 2026 | Weill David | Director | Buy | 1,336 | $81.63 | $109K | SEC |
Who owns TMDX? Hedge funds and superinvestors
15 13F filers hold TMDX among their 50 largest positions, worth $117.5M combined. The biggest bets by portfolio weight are FirstWave Capital Management LLC (5.6%), Lagoda Investment Management, L.P. (3.6%) and Bastion Asset Management Inc. (1.7%). In their latest 13Fs, 0 managers opened a new position and 5 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Braidwell LPHedge fund | 1.6% | $40.5M | 609,715 | +85.1% shares | Q2 2026 |
| Zevenbergen Capital Investments LLCMutual fund manager | 0.5% | $22.3M | 267,282 | — | Q3 2026 |
| FirstWave Capital Management LLCHedge fund | 5.6% | $12.7M | 191,240 | +53.9% shares | Q2 2026 |
| Trek Financial, LLCWealth manager | 0.6% | $12.0M | 143,667 | — | Q3 2026 |
| Brown Capital Management LLCMutual fund manager | 1.4% | $7.5M | 89,828 | +0.0% shares | Q3 2026 |
| Lagoda Investment Management, L.P.Wealth manager | 3.6% | $6.5M | 97,465 | +7.7% shares | Q2 2026 |
| Bastion Asset Management Inc.Hedge fund | 1.7% | $5.1M | 79,452 | +43.3% shares | Q2 2026 |
| Biondo Investment Advisors, LLCWealth manager | 0.4% | $2.9M | 44,155 | -23.8% shares | Q2 2026 |
| Taylor Frigon Capital Management LLCHedge fund | 1.5% | $2.9M | 34,986 | — | Q3 2026 |
| Bullseye Asset Management LLCInstitutional asset manager | 0.8% | $1.6M | 24,301 | +1.0% shares | Q2 2026 |
| Sectoral Asset Management IncHedge fund | 1.0% | $1.5M | 21,950 | — | Q2 2026 |
| Beaconlight Capital, LLCHedge fund | 0.5% | $1.0M | 15,406 | -63.7% shares | Q2 2026 |
| Keystone Global Partners, LLCWealth manager | 0.2% | $601K | 7,200 | +0.0% shares | Q3 2026 |
| CFG Wealth Management Services, Inc.Wealth manager | 0.4% | $392K | 4,987 | +6.4% shares | Q3 2026 |
| Titan Wealth (CI) LtdWealth manager | 0.0% | $22K | 325 | +0.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q3 2026: 6, Q2 2026: 9). Screen TMDX in the grand portfolio →
TMDX stock trades by members of Congress
No member of Congress has disclosed a trade in TMDX.
TMDX questions and answers
Are insiders buying TMDX stock?
Between Aug 1, 2026 and Oct 29, 2026, 1 TMDX insider filed 1 open-market purchase worth $109K on SEC Form 4.
Which hedge funds own TMDX?
15 13F filers hold TMDX among their 50 largest positions, worth $117.5M combined. The biggest bets by portfolio weight are FirstWave Capital Management LLC (5.6%), Lagoda Investment Management, L.P. (3.6%) and Bastion Asset Management Inc. (1.7%). In their latest 13Fs, 0 managers opened a new position and 5 added to one.
Has Congress traded TMDX?
No member of Congress has disclosed a trade in TMDX.
Who is the largest holder of TMDX?
Among 13F filers, Braidwell LP reports the largest TMDX position, $40.5M (609,715 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is FirstWave Capital Management LLC's: 5.6% of its portfolio.
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