// company-profile
TransMedics Group, Inc.
TMDX// activity-summary
Recent insider activity is bullish. Over the last 30 days, 2 insiders purchased shares versus 1 sale. Buying was led by Gunderson Thomas J..
// 90-day insight
Over the last 90 days, TransMedics Group, Inc. insiders bought $43K (11 transactions) and sold $722K (1 transaction).
- Most active insider: Gunderson Thomas J. with 4 transactions totaling $765K.
- Largest single sale: $722K by Gunderson Thomas J. on Jun 15, 2026.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of TransMedics Group, Inc. as of 2026-03-31
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 15, 2026 | Gunderson Thomas J. | TMDX | Sale | 9,624 | $75.06 | $722K |
| Jun 15, 2026 | Gunderson Thomas J. | TMDX | Option Exercise | 19,285 | $2.21 | $43K |
| Jun 15, 2026 | Gunderson Thomas J. | TMDX | Option Exercise | 19,285 | $0.00 | $0K |
| May 20, 2026 | TOBIN JAMES R | TMDX | Award | 2,922 | $0.00 | $0K |
| May 20, 2026 | Gunderson Thomas J. | TMDX | Award | 2,922 | $0.00 | $0K |
45 more transactions hidden
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