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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 Officer2026-04-151,926$20.66
$39.79kSell
Mark David NovaraEVP CHIEF COMMERCIAL OFFICER2026-03-17187$23.05
$4.31kSell
Mark David NovaraEVP CHIEF COMMERCIAL OFFICER2026-03-165,540$21.59
$119.61kSell
Mark David NovaraEVP CHIEF COMMERCIAL OFFICER2026-03-052$22.81
$45.62Sell
Leigh VossellerEVP CHIEF FINANCIAL OFFICER2026-02-17619$18.95
$11.73kSell
John F. SheridanPRESIDENT CEO2026-02-171,963$18.95
$37.20kSell
John F. SheridanPRESIDENT CEO2026-02-172,400$18.95
$45.48kSell
Susan MorrisonEVP Chief Admin. Officer2026-02-17510$18.95
$9.66kSell
Mark David NovaraEVP CHIEF COMMERCIAL OFFICER2026-02-1762$18.95
$1.17kSell
Elizabeth Anne GasserEVP Chief Strategy Officer2026-02-17887$18.95
$16.81kSell

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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 Inc16.32%11,149,181$236.81MInstitution
Vanguard Group Inc10.74%7,341,356$155.93MInstitution
Sessa Capital IM LP7.32%5,000,000$106.20MInstitution
Douglas A. Roeder5.40%3,688,625$78.35MInsider
Delphi Management Partners VIII LLC5.37%3,668,019$77.91MInsider
Nicole Vitullo4.75%3,243,448$68.89MInsider
James C. Blair4.75%3,243,448$68.89MInsider
Brian H. Dovey4.75%3,243,448$68.89MInsider
Brian K. Halak4.75%3,243,448$68.89MInsider
Kathleen K. Schoemaker4.75%3,243,448$68.89MInsider

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TNDM vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
TNDM66.63%33.37%Net SellingNet Selling
BFLY46.72%36.54%Net SellingNet Selling
NVCR59.26%40.74%Net SellingNet Selling
PRCT75.86%24.14%Net BuyingNet Buying
INSP66.30%33.70%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 109.57% institutional shareholders, 54.87% 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 5.40% of the company. Douglas A. Roeder's Tandem Diabetes Care shares are currently valued at $73.88M.

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