MarketPeel
Insider Trading Intelligence
PRESIDENT & CEO
Fri, May 15, 2026
May 15
sold $242.86k of TNDM
18,944 shares @ $12.82
Decreased holdings by -11.10%
16th largest trade (out of 215)
Abnormally LargeCluster Buy
Trade made by an officer
Part of a cluster of 19 transactions by 10 insiders
56% win rate · -6.1% median edge vs SPY (16 trades, 90-day · small sample)
Abnormally large trade for this company
Price 29% below 200-day moving average
Small Cap stock — insider trades carry more weight
TNDMTANDEM DIABETES CARE INC
Health CareMedical Devices
1D0.00%
1W-5.67%
1M-21.23%
3M
6M
1Y

Recent insider activity at TNDM

Full TNDM profile →Sheridan John F’s trading history →
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