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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 Officer2026-07-151,926$15.28
$29.43kSell
Elizabeth Anne GasserEVP Chief Strategy Officer2026-05-15807$12.82
$10.35kSell
Rick CarpenterEVP Chief Technology Officer2026-05-15732$12.82
$9.38kSell
Rick CarpenterEVP Chief Technology Officer2026-05-15457$12.82
$5.86kSell
Rick CarpenterEVP Chief Technology Officer2026-05-153,277$12.82
$42.01kSell
Rick CarpenterEVP Chief Technology Officer2026-05-151,336$10.90
$14.56kBuy
Elizabeth Anne GasserEVP Chief Strategy Officer2026-05-15589$12.82
$7.55kSell
Elizabeth Anne GasserEVP Chief Strategy Officer2026-05-154,114$12.82
$52.74kSell
Elizabeth Anne GasserEVP Chief Strategy Officer2026-05-151,337$10.90
$14.57kBuy
Shannon Marie HansenEVP Chief Legal Officer2026-05-15732$12.82
$9.38kSell

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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 Inc15.60%10,690,844$174.15MInstitution
Sessa Capital IM LP6.90%4,730,757$77.06MInstitution
Vanguard Portfolio Management LLC5.83%3,993,333$65.05MInstitution
Douglas A. Roeder5.38%3,688,625$60.09MInsider
Delphi Management Partners VIII LLC5.35%3,668,019$59.75MInsider
Brian K. Halak4.73%3,243,448$52.84MInsider
Kathleen K. Schoemaker4.73%3,243,448$52.84MInsider
Jesse I. Treu4.73%3,243,448$52.84MInsider
Nicole Vitullo4.73%3,243,448$52.84MInsider
James C. Blair4.73%3,243,448$52.84MInsider

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TNDM vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
TNDM67.64%32.36%Net SellingNet Selling
AVNS95.50%4.50%Net BuyingNet Selling
QDEL81.24%18.76%Net BuyingNet Selling
AORT80.30%19.70%Net SellingNet Buying
IRMD59.62%39.27%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 114.78% institutional shareholders, 54.91% 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 5.38% of the company. Douglas A. Roeder's Tandem Diabetes Care shares are currently valued at $63.00M.

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