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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 OFFICER2026-03-052$22.81
$45.62Sell
Elizabeth Anne GasserEVP Chief Strategy Officer2026-02-17647$18.95
$12.26kSell
John F. SheridanPRESIDENT CEO2026-02-172,400$18.95
$45.48kSell
John F. SheridanPRESIDENT CEO2026-02-171,963$18.95
$37.20kSell
Susan MorrisonEVP Chief Admin. Officer2026-02-17510$18.95
$9.66kSell
Elizabeth Anne GasserEVP Chief Strategy Officer2026-02-17887$18.95
$16.81kSell
Leigh VossellerEVP CHIEF FINANCIAL OFFICER2026-02-17619$18.95
$11.73kSell
Shannon Marie HansenEVP Chief Legal Officer2026-02-17592$18.95
$11.22kSell
Rick CarpenterChief Technology Officer2026-02-17808$18.95
$15.31kSell
Rick CarpenterChief Technology Officer2026-02-17504$18.95
$9.55kSell

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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$232.79MInstitution
Vanguard Group Inc10.74%7,341,356$153.29MInstitution
Sessa Capital IM LP7.32%5,000,000$104.40MInstitution
Douglas A. Roeder5.40%3,688,625$77.02MInsider
Delphi Management Partners VIII LLC5.37%3,668,019$76.59MInsider
Nicole Vitullo4.75%3,243,448$67.72MInsider
Brian K. Halak4.75%3,243,448$67.72MInsider
Brian H. Dovey4.75%3,243,448$67.72MInsider
Kathleen K. Schoemaker4.75%3,243,448$67.72MInsider
Jesse I. Treu4.75%3,243,448$67.72MInsider

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TNDM vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
TNDM66.63%33.37%Net SellingNet Selling
NVCR59.25%40.75%Net SellingNet Selling
AXGN60.61%39.39%Net SellingNet Selling
PRCT75.88%24.12%Net BuyingNet Buying
UFPT87.07%12.93%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 109.54% institutional shareholders, 54.86% 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 $80.71M.

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