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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
Mark David NovaraEVP CHIEF COMMERCIAL OFFICER2025-12-153,843$22.11
$84.97kSell
Rick CarpenterChief Technology Officer2025-12-15207$22.11
$4.58kSell
Jeanclaude KyrillosEVP Chief Operating Officer2025-11-17160$15.59
$2.49kBuy
Mark David NovaraEVP CHIEF COMMERCIAL OFFICER2025-11-1740$18.61
$744.40Sell
Rick CarpenterChief Technology Officer2025-11-17730$18.61
$13.59kSell
Rick CarpenterChief Technology Officer2025-11-17456$18.61
$8.49kSell
Susan MorrisonEVP Chief Admin. Officer2025-11-17430$18.61
$8.00kSell
Susan MorrisonEVP Chief Admin. Officer2025-11-17314$18.61
$5.84kSell
John F. SheridanPRESIDENT CEO2025-11-173,038$18.61
$56.54kSell
Leigh VossellerEVP CHIEF FINANCIAL OFFICER2025-11-17536$18.61
$9.97kSell

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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$265.99MInstitution
Vanguard Group Inc10.42%7,063,314$155.25MInstitution
Sessa Capital IM LP7.37%5,000,000$109.90MInstitution
Arrowmark Colorado Holdings LLC5.44%3,691,198$81.13MInstitution
Douglas A. Roeder5.44%3,688,625$81.08MInsider
Delphi Management Partners VIII LLC5.41%3,668,019$80.62MInsider
Brian K. Halak4.78%3,243,448$71.29MInsider
Kathleen K. Schoemaker4.78%3,243,448$71.29MInsider
James C. Blair4.78%3,243,448$71.29MInsider
Jesse I. Treu4.78%3,243,448$71.29MInsider

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TNDM vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
TNDM66.64%33.36%Net SellingNet Selling
NVCR58.30%41.70%Net BuyingNet Selling
AXGN59.81%40.19%Net SellingNet Selling
AHCO50.16%49.84%Net SellingNet Selling
BBNX91.84%8.16%Net BuyingNet 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 $79.49M.

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