MarketPeel
Insider Trading Intelligence
DW

David Weill

TMDX
DIRECTOR · TRANSMEDICS GROUP, INC. · CIK 0001774270
FILING MIX · LIFETIME54%/46%
BUYS
14
SELLS
12
TOTAL VALUE
$4.18M
COMPANIES
1
ACTIVE SINCE
Jun 2020
HOLDINGS NOW
15,056
AVG SELL PX
$85.49
TRADE KIND
SHOWING 26 / 26
Trades · vs SPY
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Performance · forward returns vs SPY
9 backtested trades · 8 horizons · 6 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by David Weill, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d9+44.44%-1.15%+0.84%-2.00%-0.28%
14d9+55.56%-3.69%-0.25%-3.44%-3.24%
30d9+44.44%-4.74%+0.43%-5.17%-6.86%
60d9+55.56%-9.43%+2.94%-12.36%-6.05%
90d9+55.56%+0.19%+4.58%+2.45%+7.00%
180d9(1 pending)+75.00%-13.42%+12.05%-19.95%-31.27%
1y9(2 pending)+57.14%+17.55%+21.39%-3.84%-15.60%
2y9(3 pending)+83.33%+3.57%+51.01%-36.36%-59.09%
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
TMDX · 15,056 shares · as of May 20, 2026
08,78617,57326,35935,145202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 14 buys / 12 sellsCOVERAGE · 25 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
TMDX
TRANSMEDICS GROUP, INC.
PURCHASEGRANT
Stock grant
2,92215,056May 20, 2026May 22, 2026View →
TMDX
TRANSMEDICS GROUP, INC.
PURCHASE
3,571$14.20$50.7K15,705Mar 4, 2026Mar 6, 2026View →
TMDX
TRANSMEDICS GROUP, INC.
SALE
3,571$146.82$524.3K12,134Mar 4, 2026Mar 6, 2026View →
TMDX
TRANSMEDICS GROUP, INC.
SALE
3,5711,429Mar 4, 2026Mar 6, 2026View →
TMDX
TRANSMEDICS GROUP, INC.
PURCHASE
5,000$14.20$71.0K17,134Dec 3, 2025Dec 5, 2025View →
TMDX
TRANSMEDICS GROUP, INC.
SALE
5,0005,000Dec 3, 2025Dec 5, 2025View →
TMDX
TRANSMEDICS GROUP, INC.
SALE
5,000$138.64$693.2K12,134Dec 3, 2025Dec 5, 2025View →
TMDX
TRANSMEDICS GROUP, INC.
SALE
732$123.88$90.7K12,134May 23, 2025May 23, 2025View →
TMDX
TRANSMEDICS GROUP, INC.
PURCHASEGRANT
Stock grant
2,13412,866May 22, 2025May 23, 2025View →
TMDX
TRANSMEDICS GROUP, INC.
SALE
1,193$141.65$169.0K10,732May 29, 2024May 31, 2024View →
TMDX
TRANSMEDICS GROUP, INC.
PURCHASEGRANT
Stock grant
1,1541,154May 23, 2024May 28, 2024View →
TMDX
TRANSMEDICS GROUP, INC.
PURCHASEGRANT
Stock grant
73211,925May 23, 2024May 28, 2024View →
TMDX
TRANSMEDICS GROUP, INC.
SALE
2,500$129.82$324.6K11,193May 10, 2024May 14, 2024View →
TMDX
TRANSMEDICS GROUP, INC.
PURCHASE
2,500$62.00$155.0K13,693Aug 29, 2023Aug 30, 2023View →
TMDX
TRANSMEDICS GROUP, INC.
PURCHASEGRANT
Stock grant
1,9161,916May 25, 2023May 30, 2023View →
TMDX
TRANSMEDICS GROUP, INC.
PURCHASEGRANT
Stock grant
1,19311,193May 25, 2023May 30, 2023View →
TMDX
TRANSMEDICS GROUP, INC.
SALE
5,93410,000Feb 27, 2023Feb 28, 2023View →
TMDX
TRANSMEDICS GROUP, INC.
SALE
964$77.64$74.8K14,970Feb 27, 2023Feb 28, 2023View →
TMDX
TRANSMEDICS GROUP, INC.
PURCHASE
5,934$14.20$84.3K15,934Feb 27, 2023Feb 28, 2023View →
TMDX
TRANSMEDICS GROUP, INC.
SALE
4,970$76.51$380.3K10,000Feb 27, 2023Feb 28, 2023View →
TMDX
TRANSMEDICS GROUP, INC.
PURCHASE
21,645$16.00$346.3K35,145Nov 10, 2022Nov 14, 2022View →
TMDX
TRANSMEDICS GROUP, INC.
SALE
21,6450Nov 10, 2022Nov 14, 2022View →
TMDX
TRANSMEDICS GROUP, INC.
SALE
21,645$56.00$1.21M13,500Nov 10, 2022Nov 14, 2022View →
TMDX
TRANSMEDICS GROUP, INC.
PURCHASEGRANT
Stock grant
13,50013,500Jun 1, 2022Jun 6, 2022View →
TMDX
TRANSMEDICS GROUP, INC.
PURCHASEGRANT
Stock grant
13,50013,500May 27, 2021Jun 1, 2021View →
TMDX
TRANSMEDICS GROUP, INC.
PURCHASEGRANT
Stock grant
15,93415,934Jun 4, 2020Jun 5, 2020View →
Other insiders · TMDX
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About this filer
CIK 0001774270
ROLE
Director
PRIMARY
TMDX
COMPANIES
1
ACTIVE SINCE
Jun 2020
MARKETPEEL · /INSIDER/0001774270DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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