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NASDAQ: TNDM
Tandem Diabetes Care Inc Stock Ownership - Who owns Tandem Diabetes Care?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Tandem Diabetes Care Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Jeanclaude KyrillosEVP Chief Operating Officer2026-01-152,118$21.07
$44.63kSell
Mark David NovaraEVP CHIEF COMMERCIAL OFFICER2025-12-153,843$22.11
$84.97kSell
Rick CarpenterChief Technology Officer2025-12-15207$22.11
$4.58kSell
Mark David NovaraEVP CHIEF COMMERCIAL OFFICER2025-11-1740$18.61
$744.40Sell
Rick CarpenterChief Technology Officer2025-11-17730$18.61
$13.59kSell
Elizabeth Anne GasserEVP Chief Strategy Officer2025-11-17586$15.59
$9.14kBuy
Elizabeth Anne GasserEVP Chief Strategy Officer2025-11-17805$18.61
$14.98kSell
Rick CarpenterChief Technology Officer2025-11-17456$18.61
$8.49kSell
Shannon Marie HansenEVP Chief Legal Officer2025-11-17393$18.61
$7.31kSell
Jeanclaude KyrillosEVP Chief Operating Officer2025-11-17160$15.59
$2.49kBuy

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Net Insider Buy/Sell (L12M) Ownership

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TNDM Shareholders

What type of owners hold Tandem Diabetes Care Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Blackrock Inc17.85%12,101,471$240.70MInstitution
Vanguard Group Inc10.42%7,063,314$140.49MInstitution
Sessa Capital IM LP7.37%5,000,000$99.45MInstitution
Arrowmark Colorado Holdings LLC5.44%3,691,198$73.42MInstitution
Douglas A. Roeder5.44%3,688,625$73.37MInsider
Delphi Management Partners VIII LLC5.41%3,668,019$72.96MInsider
Nicole Vitullo4.78%3,243,448$64.51MInsider
Jesse I. Treu4.78%3,243,448$64.51MInsider
Brian H. Dovey4.78%3,243,448$64.51MInsider
Brian K. Halak4.78%3,243,448$64.51MInsider

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TNDM vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
TNDM66.64%33.36%Net SellingNet Selling
AHCO50.16%49.84%Net SellingNet Selling
NVCR58.30%41.70%Net BuyingNet Selling
IRMD54.34%40.26%Net SellingNet Selling
CNMD97.24%2.76%Net SellingNet Selling
View Top Medical Device Stocks

Tandem Diabetes Care Stock Ownership FAQ

Who owns Tandem Diabetes Care?

Tandem Diabetes Care (NASDAQ: TNDM) is owned by 110.41% institutional shareholders, 55.26% Tandem Diabetes Care insiders, and 0.00% retail investors. Douglas A. Roeder is the largest individual Tandem Diabetes Care shareholder, owning 3.69M shares representing 5.44% of the company. Douglas A. Roeder's Tandem Diabetes Care shares are currently valued at $73.37M.

If you're new to stock investing, here's how to buy Tandem Diabetes Care stock.
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