InsiderTrades.com logo

TNDM Insider Trading

Insider Ownership Percentage: 1.90%
Insider Buying (Last 12 Months): $442,659.36
Insider Selling (Last 12 Months): $0.00

Tandem Diabetes Care Insider Trading History Chart

This chart shows the insider buying and selling history at Tandem Diabetes Care by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

Tandem Diabetes Care Share Price & Price History

Current Price: $19.17
Price Change: ▲ Price Increase of +0.23 (1.21%)
As of 02/6/2026 05:00 PM ET

This chart shows the closing price history over time for TNDM up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

Tandem Diabetes Care Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
8/11/2025John F. SheridanCEOBuy10,000$10.23$102,300.00106,327View SEC Filing Icon  
8/8/2025Leigh VossellerCFOBuy13,720$10.89$149,410.8025,580View SEC Filing Icon  
3/7/2025Jean-Claude KyrillosCOOBuy10,538$18.12$190,948.5610,538View SEC Filing Icon  
11/20/2024Kim D. BlickenstaffDirectorSell10,000$30.00$300,000.00195,190View SEC Filing Icon  
11/20/2024Kim D. BlickenstaffDirectorSell10,000$30.00$300,000.00195,190View SEC Filing Icon  
11/15/2024Mark David NovaraEVPBuy532$23.24$12,363.68532View SEC Filing Icon  
5/30/2024Dick AllenDirectorSell5,000$51.68$258,400.0024,396View SEC Filing Icon  
11/27/2023Dick AllenDirectorBuy5,000$18.96$94,800.0019,962View SEC Filing Icon  
11/8/2023Leigh VossellerCFOBuy6,200$15.39$95,418.0011,860View SEC Filing Icon  
11/8/2023Shannon Marie HansenInsiderBuy1,935$15.44$29,876.401,935View SEC Filing Icon  
9/15/2023Kathleen McGroddy-GoetzDirectorBuy1,000$21.45$21,450.009,032View SEC Filing Icon  
5/18/2023Dick AllenDirectorBuy10,000$29.47$294,700.0012,205View SEC Filing Icon  
5/12/2023Leigh VossellerCFOBuy3,015$32.77$98,801.555,660View SEC Filing Icon  
3/3/2023David B. BergerCOOSell10,000$41.19$411,900.003,365View SEC Filing Icon  
See Full Table

SEC Filings (Institutional Ownership Changes) for Tandem Diabetes Care (NASDAQ:TNDM)

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at TNDM by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Tandem Diabetes Care Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
2/6/2026Mizuho Markets Americas LLC144,617$3.18M0.1%+23.2%0.213%Search for SEC Filing on Google Icon
2/6/2026Legato Capital Management LLC72,580$1.60M0.1%N/A0.107%Search for SEC Filing on Google Icon
2/6/2026Leonteq Securities AG7,806$0.17M0.0%N/A0.012%Search for SEC Filing on Google Icon
2/6/2026Creative Financial Designs Inc. ADV3,431$75K0.0%+36.0%0.005%Search for SEC Filing on Google Icon
2/6/2026PNC Financial Services Group Inc.22,347$0.49M0.0%+5.6%0.033%Search for SEC Filing on Google Icon
2/6/2026ProShare Advisors LLC13,185$0.29M0.0%+4.6%0.019%Search for SEC Filing on Google Icon
2/5/2026HighMark Wealth Management LLC35,120$0.77M0.3%+49.0%0.052%Search for SEC Filing on Google Icon
2/4/2026VIRGINIA RETIREMENT SYSTEMS ET Al24,700$0.54M0.0%-33.2%0.036%Search for SEC Filing on Google Icon
2/4/2026Prosperitas Financial LLC10,000$0.22M0.1%N/A0.015%Search for SEC Filing on Google Icon
2/2/2026Truist Financial Corp28,171$0.62M0.0%-75.6%0.042%Search for SEC Filing on Google Icon
2/2/2026MN Wealth Advisors LLC13,770$0.30M0.2%-21.0%0.020%Search for SEC Filing on Google Icon
2/2/2026Oppenheimer Asset Management Inc.37,940$0.83M0.0%-8.6%0.056%Search for SEC Filing on Google Icon
1/30/2026Jennison Associates LLC2,021,376$44.43M0.0%+42.3%2.981%Search for SEC Filing on Google Icon
1/29/2026Comerica Bank21,445$0.47M0.0%-16.1%0.032%Search for SEC Filing on Google Icon
1/29/2026Teachers Retirement System of The State of Kentucky16,851$0.37M0.0%-11.3%0.025%Search for SEC Filing on Google Icon
1/29/2026Vanguard Group Inc.7,341,356$161.36M0.0%+3.9%10.828%Search for SEC Filing on Google Icon
1/28/2026Arizona State Retirement System18,897$0.42M0.0%-4.0%0.028%Search for SEC Filing on Google Icon
1/28/2026Paradice Investment Management LLC2,077,745$45.67M8.9%-5.4%3.065%Search for SEC Filing on Google Icon
1/28/2026Universal Beteiligungs und Servicegesellschaft mbH89,094$1.96M0.0%-9.4%0.131%Search for SEC Filing on Google Icon
1/27/2026Zurcher Kantonalbank Zurich Cantonalbank 74,015$1.63M0.0%+245.1%0.109%Search for SEC Filing on Google Icon
1/27/2026Bayforest Capital Ltd27,409$0.60M0.4%+42.1%0.040%Search for SEC Filing on Google Icon
1/26/2026Greenwood Capital Associates LLC15,350$0.34M0.0%N/A0.023%Search for SEC Filing on Google Icon
1/26/2026CWM LLC24,449$0.54M0.0%+11.2%0.036%Search for SEC Filing on Google Icon
1/26/2026KBC Group NV2,011$44K0.0%-99.0%0.003%Search for SEC Filing on Google Icon
1/23/2026Farther Finance Advisors LLC3,600$79K0.0%+36.6%0.005%Search for SEC Filing on Google Icon
1/23/2026State of Alaska Department of Revenue38,676$0.85M0.0%+1.4%0.057%Search for SEC Filing on Google Icon
1/23/2026Baillie Gifford & Co.1,145,516$25.18M0.0%+2.2%1.690%Search for SEC Filing on Google Icon
1/21/2026Yousif Capital Management LLC18,781$0.39M0.0%-11.9%0.028%Search for SEC Filing on Google Icon
1/16/2026Aberdeen Group plc547,035$12.02M0.0%-8.5%0.807%Search for SEC Filing on Google Icon
1/16/2026Banque Pictet & Cie SA97,187$2.14M0.0%+29.6%0.143%Search for SEC Filing on Google Icon
1/13/2026CoreCap Advisors LLC5,909$0.13M0.0%+24.4%0.009%Search for SEC Filing on Google Icon
1/9/2026SG Americas Securities LLC61,958$1.36M0.0%-1.7%0.091%Search for SEC Filing on Google Icon
1/9/2026Assenagon Asset Management S.A.1,227,856$26.99M0.0%N/A1.811%Search for SEC Filing on Google Icon
1/9/2026Diversified Trust Co.19,558$0.43M0.0%+6.6%0.029%Search for SEC Filing on Google Icon
1/9/2026180 Wealth Advisors LLC13,443$0.30M0.0%+29.3%0.020%Search for SEC Filing on Google Icon
1/8/2026Wealth Enhancement Advisory Services LLC18,693$0.44M0.0%+23.9%0.028%Search for SEC Filing on Google Icon
1/5/2026Park Avenue Securities LLC9,403$0.21M0.0%N/A0.014%Search for SEC Filing on Google Icon
1/5/2026GAMMA Investing LLC4,542$100K0.0%+308.1%0.007%Search for SEC Filing on Google Icon
1/1/2026JPMorgan Chase & Co.359,071$4.36M0.0%-36.1%0.530%Search for SEC Filing on Google Icon
11/19/2025Caitong International Asset Management Co. Ltd2,205$27K0.0%+200.0%0.003%Search for SEC Filing on Google Icon
11/18/2025Advisory Services Network LLC8,274$100K0.0%-27.8%0.012%Search for SEC Filing on Google Icon
11/17/2025Jacobs Levy Equity Management Inc.1,481,953$17.99M0.1%+3.5%2.186%Search for SEC Filing on Google Icon
11/17/2025Dark Forest Capital Management LP75,535$0.92M0.0%+23.8%0.111%Search for SEC Filing on Google Icon
11/17/2025PharVision Advisers LLC22,268$0.27M0.2%N/A0.033%Search for SEC Filing on Google Icon
11/17/2025XTX Topco Ltd73,545$0.89M0.0%+291.3%0.108%Search for SEC Filing on Google Icon
11/17/2025Verition Fund Management LLC23,066$0.28M0.0%-89.4%0.034%Search for SEC Filing on Google Icon
11/17/2025Quarry LP3,695$45K0.0%+2,597.1%0.005%Search for SEC Filing on Google Icon
11/17/2025Prelude Capital Management LLC18,754$0.23M0.0%N/A0.028%Search for SEC Filing on Google Icon
11/17/2025Mariner LLC24,803$0.30M0.0%+39.8%0.037%Search for SEC Filing on Google Icon
11/17/2025Millennium Management LLC705,902$8.57M0.0%-27.2%1.041%Search for SEC Filing on Google Icon
11/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.62,698$0.76M0.0%-1.5%0.092%Search for SEC Filing on Google Icon
11/17/2025Moore Capital Management LP220,479$2.68M0.0%+269.2%0.325%Search for SEC Filing on Google Icon
11/17/2025Brevan Howard Capital Management LP126,888$1.54M0.0%+33.9%0.187%Search for SEC Filing on Google Icon
11/17/2025ArrowMark Colorado Holdings LLC3,691,198$44.81M0.8%+36.7%5.444%Search for SEC Filing on Google Icon
11/17/2025Algert Global LLC226,886$2.75M0.0%-57.3%0.335%Search for SEC Filing on Google Icon
11/17/2025Alliancebernstein L.P.223,720$2.72M0.0%-17.2%0.330%Search for SEC Filing on Google Icon
11/17/2025Ameriprise Financial Inc.168,730$2.05M0.0%-59.7%0.249%Search for SEC Filing on Google Icon
11/14/2025Schonfeld Strategic Advisors LLC142,855$1.73M0.0%-28.5%0.211%Search for SEC Filing on Google Icon
11/14/2025Raymond James Financial Inc.136,926$1.66M0.0%-4.4%0.202%Search for SEC Filing on Google Icon
11/14/2025Freestone Grove Partners LP1,870,307$22.71M0.2%N/A2.758%Search for SEC Filing on Google Icon
11/14/2025UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC184,895$2.25M0.0%-31.2%0.273%Search for SEC Filing on Google Icon
11/14/2025Two Sigma Investments LP1,117,202$13.56M0.0%-9.4%1.648%Search for SEC Filing on Google Icon
11/14/2025Comerica Bank25,549$0.31M0.0%-13.6%0.038%Search for SEC Filing on Google Icon
11/13/2025Invesco Ltd.302,041$3.67M0.0%+33.2%0.445%Search for SEC Filing on Google Icon
11/13/2025Sei Investments Co.215,984$2.62M0.0%+15.7%0.319%Search for SEC Filing on Google Icon
11/13/2025Capital Fund Management S.A.171,109$2.08M0.0%-34.8%0.252%Search for SEC Filing on Google Icon
11/13/2025BNP Paribas Financial Markets219,615$2.67M0.0%-97.8%0.324%Search for SEC Filing on Google Icon
11/13/2025Franklin Resources Inc.40,772$0.50M0.0%+51.3%0.060%Search for SEC Filing on Google Icon
11/13/2025Van ECK Associates Corp2,049$25K0.0%-68.7%0.003%Search for SEC Filing on Google Icon
11/13/2025Legal & General Group Plc182,432$2.22M0.0%-1.3%0.269%Search for SEC Filing on Google Icon
11/13/2025Russell Investments Group Ltd.137,672$1.67M0.0%-30.7%0.203%Search for SEC Filing on Google Icon
11/13/2025Natixis Advisors LLC56,404$0.69M0.0%+33.0%0.083%Search for SEC Filing on Google Icon
11/13/2025First Trust Advisors LP40,730$0.49M0.0%N/A0.060%Search for SEC Filing on Google Icon
11/12/2025Orion Porfolio Solutions LLC43,982$0.53M0.0%-1.4%0.065%Search for SEC Filing on Google Icon
11/12/2025GW&K Investment Management LLC2,721,649$33.04M0.3%-5.8%4.014%Search for SEC Filing on Google Icon
11/12/2025Teachers Retirement System of The State of Kentucky19,003$0.23M0.0%-10.7%0.028%Search for SEC Filing on Google Icon
11/12/2025Royce & Associates LP510,000$6.19M0.1%N/A0.752%Search for SEC Filing on Google Icon
11/12/2025Aster Capital Management DIFC Ltd5,149$63K0.0%+485.1%0.008%Search for SEC Filing on Google Icon
11/12/2025Intech Investment Management LLC73,493$0.89M0.0%+55.2%0.108%Search for SEC Filing on Google Icon
11/12/2025US Bancorp DE2,355$29K0.0%-93.3%0.003%Search for SEC Filing on Google Icon
11/10/2025Counterpoint Mutual Funds LLC42,265$0.51M0.0%N/A0.063%Search for SEC Filing on Google Icon
11/10/2025Ameritas Investment Partners Inc.5,586$68K0.0%-18.7%0.008%Search for SEC Filing on Google Icon
11/10/2025China Universal Asset Management Co. Ltd.8,000$97K0.0%N/A0.012%Search for SEC Filing on Google Icon
11/7/2025GSA Capital Partners LLP98,941$1.20M0.1%N/A0.146%Search for SEC Filing on Google Icon
11/7/2025Vanguard Group Inc.7,063,314$85.75M0.0%-4.2%10.453%Search for SEC Filing on Google Icon
11/7/2025JPMorgan Chase & Co.359,071$4.36M0.0%-36.1%0.531%Search for SEC Filing on Google Icon
11/7/2025Shell Asset Management Co.3,878$47K0.0%-83.0%0.006%Search for SEC Filing on Google Icon
11/7/2025Aberdeen Group plc598,096$7.26M0.0%+67.9%0.885%Search for SEC Filing on Google Icon
11/6/2025Public Sector Pension Investment Board263,564$3.20M0.0%+16.1%0.390%Search for SEC Filing on Google Icon
11/6/2025Caprock Group LLC44,359$0.56M0.0%N/A0.066%Search for SEC Filing on Google Icon
11/6/2025Rhumbline Advisers190,184$2.31M0.0%-1.6%0.281%Search for SEC Filing on Google Icon
11/6/2025Versor Investments LP26,200$0.32M0.1%N/A0.039%Search for SEC Filing on Google Icon
11/6/2025Bryce Point Capital LLC42,258$0.51M0.6%N/A0.063%Search for SEC Filing on Google Icon
11/6/2025ProShare Advisors LLC12,606$0.15M0.0%-15.5%0.019%Search for SEC Filing on Google Icon
11/6/2025Oppenheimer Asset Management Inc.41,495$0.50M0.0%-23.2%0.061%Search for SEC Filing on Google Icon
11/5/2025Envestnet Asset Management Inc.236,332$2.87M0.0%-15.0%0.350%Search for SEC Filing on Google Icon
11/4/2025Brown Capital Management LLC363,352$4.41M0.2%-34.1%0.538%Search for SEC Filing on Google Icon
11/4/2025State of Wyoming15,043$0.18M0.0%-29.8%0.022%Search for SEC Filing on Google Icon
11/4/2025Principal Financial Group Inc.326,701$3.97M0.0%-17.3%0.484%Search for SEC Filing on Google Icon
11/3/2025AlphaQuest LLC22,910$0.28M0.0%+31.9%0.034%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
Tandem Diabetes Care logo
Tandem Diabetes Care, Inc., a medical device company, designs, develops, and commercializes technology solutions for people living with diabetes in the United States and internationally. The company's flagship product is the t:slim X2 insulin delivery system, a pump platform for managing insulin delivery and display continuous glucose monitoring sensor information directly on the pump home screen; and Tandem Mobi insulin pump, an automated insulin delivery system. It also sells single-use products, including cartridges for storing and delivering insulin, and infusion sets that connect the insulin pump to the user's body. In addition, the company offers Tandem Device Updater used to update the pump software from a personal computer; Tandem Source, a web-based data management platform, which provides a visual way to display diabetes therapy management data from the pumps, integrated CGMs, and supported blood glucose meters; and Sugarmate, a mobile app used to help people visualize diabetes therapy data. The company was formerly known as Phluid Inc. and changed its name to Tandem Diabetes Care, Inc. in January 2008. Tandem Diabetes Care, Inc. was incorporated in 2006 and is headquartered in San Diego, California.
Read More on Tandem Diabetes Care

Today's Range

Now: $19.17
Low: $18.99
High: $19.53

50 Day Range

MA: $21.14
Low: $18.94
High: $23.54

52 Week Range

Now: $19.17
Low: $9.98
High: $37.35

Volume

737,655 shs

Average Volume

1,189,176 shs

Market Capitalization

$1.30 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

1.68

Who are the company insiders with the largest holdings of Tandem Diabetes Care?

Tandem Diabetes Care's top insider investors include:
  1. Kim D Blickenstaff (Director)
  2. John F Sheridan (CEO)
  3. Leigh Vosseller (CFO)
  4. Dick Allen (Director)
  5. Jean-Claude Kyrillos (COO)
  6. Mark David Novara (EVP)
Learn More about top insider investors at Tandem Diabetes Care.

Who are the major institutional investors of Tandem Diabetes Care?

Tandem Diabetes Care's top institutional investors include:
  1. Vanguard Group Inc. — 10.83%
  2. Paradice Investment Management LLC — 3.06%
  3. Jennison Associates LLC — 2.98%
  4. Assenagon Asset Management S.A. — 1.81%
  5. Baillie Gifford & Co. — 1.69%
  6. Aberdeen Group plc — 0.81%
Learn More about top institutional investors of Tandem Diabetes Care stock.

Which institutional investors are selling Tandem Diabetes Care stock?

In the last quarter, TNDM stock was sold by these institutional investors:
  1. KBC Group NV
  2. Paradice Investment Management LLC
  3. Truist Financial Corp
  4. Aberdeen Group plc
  5. VIRGINIA RETIREMENT SYSTEMS ET Al
  6. Universal Beteiligungs und Servicegesellschaft mbH
  7. Comerica Bank
  8. MN Wealth Advisors LLC

Which institutional investors are buying Tandem Diabetes Care stock?

In the last quarter, TNDM stock was purchased by institutional investors including:
  1. Assenagon Asset Management S.A.
  2. Jennison Associates LLC
  3. Vanguard Group Inc.
  4. Legato Capital Management LLC
  5. Zurcher Kantonalbank Zurich Cantonalbank
  6. Mizuho Markets Americas LLC
  7. Baillie Gifford & Co.
  8. Banque Pictet & Cie SA
Within the last year, these company insiders have bought Tandem Diabetes Care stock:
  1. Kim D Blickenstaff (Director)
  2. John F Sheridan (CEO)
  3. Leigh Vosseller (CFO)
  4. Dick Allen (Director)
Learn More investors buying Tandem Diabetes Care stock.