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Tandem Diabetes Care (TNDM) Institutional Ownership

Tandem Diabetes Care logo
$14.52 -0.49 (-3.26%)
Closing price 10/7/2025 04:00 PM Eastern
Extended Trading
$14.81 +0.29 (+2.00%)
As of 10/7/2025 07:34 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more.
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Institutional Ownership Changes (13F Filings) for Tandem Diabetes Care (NASDAQ:TNDM)

Number of
Institutional Buyers
(last 12 months)
205
Total
Institutional Inflows
(last 12 months)
$698.92M
Number of
Institutional Sellers
(last 12 months)
120
Total
Institutional Outflows
(last 12 months)
$643.84M
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TNDM Institutional Buying and Selling by Quarter

Tandem Diabetes Care Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
10/1/2025 Praxis Investment Management Inc.12,376$150K0.0%N/A0.018%
8/27/2025Orion Porfolio Solutions LLC44,611$832K0.0%-5.3%0.066%
8/27/2025Squarepoint Ops LLC180,660$3.37M0.0%+45.8%0.267%
8/19/2025State of Wyoming21,436$400K0.0%+379.9%0.032%
8/16/2025Public Sector Pension Investment Board227,104$4.23M0.0%+9.1%0.336%
8/15/2025CANADA LIFE ASSURANCE Co56,332$1.05M0.0%+5.7%0.083%
8/15/2025Tower Research Capital LLC TRC 9,168$171K0.0%+218.6%0.014%
8/15/2025Corient Private Wealth LLC23,600$440K0.0%+109.4%0.035%
8/15/2025State of Tennessee Department of Treasury36,189$675K0.0%+21.3%0.054%
8/15/2025Captrust Financial Advisors24,766$462K0.0%+15.1%0.037%
8/15/2025Soleus Capital Management L.P.200,000$3.73M0.2%-59.7%0.296%
8/15/2025Orion Porfolio Solutions LLC44,611$832K0.0%-5.3%0.066%
8/15/2025Moore Capital Management LP59,726$1.11M0.0%-42.8%0.088%
8/15/2025Man Group plc74,886$1.40M0.0%+174.1%0.111%
8/15/2025Engineers Gate Manager LP170,488$3.18M0.0%-10.7%0.252%
8/15/2025Beaconlight Capital LLC53,455$996K0.6%-75.7%0.079%
8/15/2025Brevan Howard Capital Management LP94,734$1.77M0.0%+778.9%0.140%
8/15/2025Balyasny Asset Management L.P.230,934$4.31M0.0%-70.0%0.342%
8/15/2025Adage Capital Partners GP L.L.C.250,000$4.66M0.0%N/A0.370%
8/15/2025Ameriprise Financial Inc.419,037$7.81M0.0%+8.0%0.620%
8/14/2025PDT Partners LLC170,420$3.18M0.2%N/A0.252%
8/14/2025Raymond James Financial Inc.143,274$2.67M0.0%-23.2%0.212%
8/14/2025Bayesian Capital Management LP28,400$529K0.1%N/A0.042%
8/14/2025Quantinno Capital Management LP319,659$5.96M0.0%+32.2%0.473%
8/14/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.63,638$1.19M0.0%-14.5%0.094%
8/14/2025Squarepoint Ops LLC180,660$3.37M0.0%+45.8%0.267%
8/14/2025Sei Investments Co.186,731$3.48M0.0%+50.7%0.276%
8/14/2025Frontier Capital Management Co. LLC364,098$6.79M0.1%-0.3%0.539%
8/14/2025Ophir Asset Management Pty Ltd1,464,956$27.31M4.3%N/A2.168%
8/14/2025Hood River Capital Management LLC2,564,978$47.81M0.7%+10.9%3.796%
8/14/2025Cerity Partners LLC82,262$1.53M0.0%+8.2%0.122%
8/14/2025Formula Growth Ltd.122,096$2.28M0.9%-1.5%0.181%
8/13/2025Jump Financial LLC162,950$3.04M0.0%N/A0.241%
8/13/2025Brown Advisory Inc.1,057,115$19.71M0.0%+14.2%1.564%
8/13/2025Amundi11,022$188K0.0%-56.2%0.016%
8/13/2025Brown Capital Management LLC551,207$10.27M0.3%-6.7%0.816%
8/13/2025Kennedy Capital Management LLC117,702$2.19M0.1%-37.1%0.174%
8/13/2025Invesco Ltd.226,789$4.23M0.0%-84.7%0.336%
8/13/2025Arrowstreet Capital Limited Partnership12,411$231K0.0%N/A0.018%
8/13/2025Quantbot Technologies LP33,445$623K0.0%N/A0.049%
8/13/2025Hsbc Holdings PLC29,742$554K0.0%+110.3%0.044%
8/13/2025Paradice Investment Management LLC1,767,179$32.94M6.7%+7.1%2.615%
8/13/2025Capital Fund Management S.A.262,431$4.89M0.0%+575.4%0.388%
8/13/2025Russell Investments Group Ltd.198,713$3.70M0.0%+42.9%0.294%
8/12/2025Advisors Asset Management Inc.25,001$466K0.0%+11.3%0.037%
8/12/2025XTX Topco Ltd18,793$350K0.0%N/A0.028%
8/12/2025Edmond DE Rothschild Holding S.A.262,600$4.90M0.1%+4.0%0.389%
8/12/2025Champlain Investment Partners LLC1,455,123$27.12M0.2%+6.3%2.154%
8/12/2025Prudential Financial Inc.382,804$7.70M0.0%+122.5%0.567%
8/12/2025Rhumbline Advisers193,219$3.60M0.0%+8.4%0.286%
8/12/2025Legal & General Group Plc184,853$3.45M0.0%+4.4%0.274%
8/12/2025JPMorgan Chase & Co.562,254$10.48M0.0%-64.0%0.832%
8/12/2025Dynamic Technology Lab Private Ltd26,143$488K0.1%+122.2%0.039%
8/11/2025Universal Beteiligungs und Servicegesellschaft mbH101,346$1.89M0.0%-90.7%0.150%
8/8/2025Intech Investment Management LLC47,343$882K0.0%-6.2%0.071%
8/8/2025Cetera Investment Advisers14,723$274K0.0%-21.3%0.022%
8/8/2025SG Americas Securities LLC27,760$517K0.0%+69.8%0.042%
8/8/2025Commonwealth of Pennsylvania Public School Empls Retrmt SYS17,101$319K0.0%+8.8%0.026%
8/8/2025Police & Firemen s Retirement System of New Jersey15,299$285K0.0%+10.1%0.023%
8/8/2025Geode Capital Management LLC1,606,336$29.95M0.0%+3.2%2.412%
8/8/2025PNC Financial Services Group Inc.20,954$391K0.0%+8.9%0.031%
8/8/2025KBC Group NV191,837$3.58M0.0%-1.0%0.288%
8/7/2025Lisanti Capital Growth LLC253,840$4.73M1.3%N/A0.381%
8/7/2025Acadian Asset Management LLC358,516$6.68M0.0%+54.0%0.538%
8/7/2025Campbell & CO Investment Adviser LLC30,108$561K0.0%N/A0.045%
8/7/2025Connor Clark & Lunn Investment Management Ltd.784,218$14.62M0.1%+21.6%1.177%
8/6/2025Fox Run Management L.L.C.31,516$587K0.1%N/A0.047%
8/5/2025Corton Capital Inc.13,038$243K0.3%N/A0.020%
8/1/2025Jennison Associates LLC1,658,942$30.92M0.0%+12.3%2.491%
8/1/2025Mizuho Markets Americas LLC138,742$2.59M0.1%+19.8%0.208%
8/1/2025Teacher Retirement System of Texas31,576$589K0.0%-2.7%0.047%
8/1/2025Bessemer Group Inc.25,046$467K0.0%+11.3%0.038%
8/1/2025Envestnet Asset Management Inc.278,010$5.18M0.0%-12.7%0.417%
7/31/2025Nisa Investment Advisors LLC4,171$78K0.0%+186.9%0.006%
7/31/2025Oppenheimer Asset Management Inc.54,041$1.01M0.0%-25.7%0.081%
7/31/2025AlphaQuest LLC17,371$324K0.0%+102.9%0.026%
7/31/2025Sector Gamma AS210,523$3.92M1.3%+16.6%0.316%
7/30/2025Stephens Investment Management Group LLC1,737,769$32.39M0.4%+1.8%2.609%
7/29/2025VIRGINIA RETIREMENT SYSTEMS ET Al36,900$688K0.0%N/A0.055%
7/28/2025Bayforest Capital Ltd9,271$173K0.1%-64.7%0.014%
7/25/2025CWM LLC2,796$52K0.0%+262.6%0.004%
7/24/2025Inspire Investing LLC20,843$389K0.0%+16.5%0.031%
7/24/2025US Bancorp DE35,360$659K0.0%-17.2%0.053%
7/21/2025HighMark Wealth Management LLC23,670$441K0.2%-6.0%0.036%
7/18/2025Truist Financial Corp123,531$2.30M0.0%-10.8%0.185%
7/16/2025State of Alaska Department of Revenue39,660$739K0.0%+9.0%0.060%
7/16/2025Banque Pictet & Cie SA84,028$1.57M0.0%N/A0.126%
7/14/2025Park Avenue Securities LLC10,938$204K0.0%-6.6%0.016%
7/11/2025Farther Finance Advisors LLC2,637$49K0.0%-35.9%0.004%
7/11/2025Diversified Trust Co16,348$305K0.0%+11.8%0.025%
7/11/2025Assenagon Asset Management S.A.31,403$585K0.0%N/A0.047%
6/18/2025Voya Investment Management LLC136,698$2.62M0.0%+39.2%0.205%
6/3/2025Inspire Investing LLC17,893$343K0.0%N/A0.027%
5/21/2025Acadian Asset Management LLC232,872$4.46M0.0%N/A0.350%
5/19/2025Bayforest Capital Ltd26,288$504K0.2%+197.0%0.039%
5/19/2025UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC193,993$3.72M0.0%+9.1%0.291%
5/16/2025Fred Alger Management LLC1,454,239$27.86M0.2%-25.2%2.183%
5/16/2025Goldman Sachs Group Inc.712,559$13.65M0.0%+5.0%1.070%
5/16/2025Dynamic Technology Lab Private Ltd11,766$225K0.0%N/A0.018%
5/16/2025Sessa Capital IM L.P.4,466,307$85.57M3.3%N/A6.705%
(Data available from 1/1/2016 forward)

TNDM Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of TNDM shares?

During the previous two years, 312 institutional investors and hedge funds held shares of Tandem Diabetes Care. The most heavily invested institutionals were Eminence Capital LP ($152.94M), Vanguard Group Inc. ($139.72M), State Street Corp ($112.63M), ArrowMark Colorado Holdings LLC ($98.11M), Sessa Capital IM L.P. ($85.57M), GW&K Investment Management LLC ($54.87M), and Hood River Capital Management LLC ($47.81M).Learn more on Tandem Diabetes Care's institutional investors.

Which institutional investors have been buying Tandem Diabetes Care's stock?

Of the 261 institutional investors that purchased Tandem Diabetes Care's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Sessa Capital IM L.P. ($4.47M), Jennison Associates LLC ($2.43M), Eminence Capital LP ($2.37M), GW&K Investment Management LLC ($2.29M), Hood River Capital Management LLC ($1.53M), Ophir Asset Management Pty Ltd ($1.46M), and Chicago Capital LLC ($1.12M).

How much institutional buying is happening at Tandem Diabetes Care?

Institutional investors have bought a total of 25,099,779 shares in the last 24 months. This purchase volume represents approximately $698.92M in transactions.

Which of Tandem Diabetes Care's major shareholders have been selling company stock?

Of the 120 institutional investors that sold Tandem Diabetes Care's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Capital World Investors ($2.50M), Janus Henderson Group PLC ($1.42M), Invesco Ltd. ($1.37M), Bellevue Group AG ($1.07M), JPMorgan Chase & Co. ($1.00M), Universal Beteiligungs und Servicegesellschaft mbH ($986.48K), and Chicago Capital LLC ($982.42K).

How much institutional selling is happening at Tandem Diabetes Care?

Institutional investors have sold a total of 21,356,560 shares in the last 24 months. This volume of shares sold represents approximately $643.84M in transactions.


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This page (NASDAQ:TNDM) was last updated on 10/8/2025 by MarketBeat.com Staff
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