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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
Christopher J. TwomeyDirector2026-10-271,700$19.15
$32.55kSell
Christopher J. TwomeyDirector2026-10-271,700$19.00
$32.30kBuy
Jeanclaude KyrillosCOO;EVP2026-10-151,926$16.52
$31.82kSell
Leigh VossellerCFO;EVP2026-08-15942$22.72
$21.40kSell
Rick CarpenterCTO;EVP2026-08-15457$22.72
$10.38kSell
Rick CarpenterCTO;EVP2026-08-15820$22.72
$18.63kSell
Elizabeth Anne GasserCStrat;EVP2026-08-15589$22.72
$13.38kSell
Elizabeth Anne GasserCStrat;EVP2026-08-151,029$22.72
$23.38kSell
Shannon Marie HansenCLO;EVP2026-08-15559$22.72
$12.70kSell
Shannon Marie HansenCLO;EVP2026-08-15976$22.72
$22.17kSell

1 of 9

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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
Douglas A. Roeder5.29%3,688,625$64.59MInsider
Delphi Management Partners VIII LLC5.26%3,668,019$64.23MInsider
Jesse I. Treu4.65%3,243,448$56.79MInsider
Kathleen K. Schoemaker4.65%3,243,448$56.79MInsider
Brian H. Dovey4.65%3,243,448$56.79MInsider
Brian K. Halak4.65%3,243,448$56.79MInsider
James C. Blair4.65%3,243,448$56.79MInsider
Nicole Vitullo4.65%3,243,448$56.79MInsider
Domain Parters VII L P4.57%3,189,058$55.84MInsider
Tpg Group Holdings Sbs Advisors Inc3.58%2,496,194$43.71MInsider

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TNDM vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
TNDM0.11%54.00%Net SellingNet Selling
NVCR0.09%56.26%Net SellingNet Selling
LMRI0.03%0.64%Net Buying
PRCT0.10%31.70%Net BuyingNet Selling
CNMD0.11%3.34%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 0.11% institutional shareholders, 54.00% Tandem Diabetes Care insiders, and 45.89% retail investors. Douglas A. Roeder is the largest individual Tandem Diabetes Care shareholder, owning 3.69M shares representing 5.29% of the company. Douglas A. Roeder's Tandem Diabetes Care shares are currently valued at $74.03M.

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