WallStreetZenWallStreetZen

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
Leigh VossellerEVP CHIEF FINANCIAL OFFICER2026-05-151,336$10.90
$14.56kBuy
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 Officer2026-05-15807$12.82
$10.35kSell
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

1 of 9

TNDM insiders have sold more... subscribe to Premium to read more.
Net Insider Buy/Sell (L12M) Ownership

Be the first to know when TNDM insiders and whales buy or sell their stock.

TNDM Shareholders

What type of owners hold Tandem Diabetes Care Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Blackrock Inc15.60%10,690,844$183.88MInstitution
Sessa Capital IM LP6.90%4,730,757$81.37MInstitution
Vanguard Portfolio Management LLC5.83%3,993,333$68.69MInstitution
Douglas A. Roeder5.38%3,688,625$63.44MInsider
Delphi Management Partners VIII LLC5.35%3,668,019$63.09MInsider
Jesse I. Treu4.73%3,243,448$55.79MInsider
Kathleen K. Schoemaker4.73%3,243,448$55.79MInsider
Brian H. Dovey4.73%3,243,448$55.79MInsider
James C. Blair4.73%3,243,448$55.79MInsider
Brian K. Halak4.73%3,243,448$55.79MInsider

1 of 3

TNDM vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
TNDM67.64%32.36%Net SellingNet Selling
AHCO45.48%54.52%Net BuyingNet Buying
IART66.54%33.46%Net SellingNet Selling
BFLY53.22%35.54%Net SellingNet Selling
ALMR0.00%10.67%Net BuyingNet Buying
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 $70.53M.

If you're new to stock investing, here's how to buy Tandem Diabetes Care stock.
©2026 WallStreetZen
Company
AboutNewsBlogStock Investing FAQPlansPrivacy PolicyTerms of ServiceCancellation & RefundsPerformanceHelp GuidesContactTwitterYouTubeNewsletter
Stock Tools
Top Performing AnalystsStock ScreenerStock ForecastTrending StocksStrong Buy StocksHighest Earnings StocksBest Dividend Paying StocksStatisticsStock Market SectorsStock Market IndustriesHow to Buy Stocks Online
Stock Ideas
Buy The DipBiggest Stock Gainers TodayBiggest Stock Losers Today52 Week High Stocks52 Week Low StocksMost Active Stocks TodayMost Undervalued StocksBest Penny Stocks to Buy NowBest Stocks Under $5Best Stocks Under $10
WallStreetZen does not provide financial advice and does not issue recommendations or offers to buy stock or sell any security.

Information is provided 'as-is' and solely for informational purposes and is not advice. WallStreetZen does not bear any responsibility for any losses or damage that may occur as a result of reliance on this data.