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Tandem Diabetes Care (TNDM) Institutional Ownership

Tandem Diabetes Care logo
$14.11 -0.58 (-3.95%)
Closing price 05/13/2026 04:00 PM Eastern
Extended Trading
$14.22 +0.11 (+0.74%)
As of 06:35 AM 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 Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Tandem Diabetes Care (NASDAQ:TNDM)

Number of
Institutional Buyers
(last 12 months)
144
Total
Institutional Inflows
(last 12 months)
$425.43M
Number of
Institutional Sellers
(last 12 months)
104
Total
Institutional Outflows
(last 12 months)
$377.83M
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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
5/14/2026Sei Investments Co.95,306$1.83M0.0%-10.6%0.139%
5/14/2026State of Wyoming17,964$344K0.0%-43.5%0.026%
5/13/2026First Trust Advisors LP342,707$6.57M0.0%N/A0.500%
5/8/2026 PNC Financial Services Group Inc.20,817$399K0.0%-6.8%0.030%
5/6/2026 Jennison Associates LLC1,658,448$31.79M0.0%-18.0%2.421%
5/5/2026 Bank of New York Mellon Corp336,291$6.45M0.0%-3.8%0.491%
5/4/2026 Principal Financial Group Inc.331,541$6.36M0.0%+2.2%0.484%
5/1/2026 180 Wealth Advisors LLC15,763$302K0.0%+17.3%0.023%
5/1/2026 Fifth Third Bancorp22,605$433K0.0%+2,075.6%0.033%
4/30/2026 Greenwood Capital Associates LLC13,941$267K0.0%-9.2%0.020%
4/27/2026 Counterpoint Mutual Funds LLC12,679$243K0.0%-44.5%0.019%
4/27/2026 New York State Teachers Retirement System66,096$1.27M0.0%-3.2%0.096%
4/27/2026 Y Intercept Hong Kong Ltd77,879$1.49M0.0%-7.3%0.114%
4/27/2026 Leonteq Securities AG9,501$182K0.0%+21.7%0.014%
4/23/2026 Inspire Investing LLC27,010$518K0.0%+28.2%0.039%
4/22/2026 Pictet Asset Management Holding SA10,764$206K0.0%N/A0.016%
4/21/2026 Louisiana State Employees Retirement System30,100$577K0.0%N/A0.044%
4/20/2026 OP Asset Management Ltd1,835$35K0.0%N/A0.003%
4/20/2026 Assenagon Asset Management S.A.178,640$3.43M0.0%-85.5%0.261%
4/16/2026 SG Americas Securities LLC33,022$633K0.0%-46.7%0.048%
4/16/2026 Diversified Trust Co21,332$409K0.0%+9.1%0.031%
3/20/2026 Hsbc Holdings PLC36,553$810K0.0%-60.7%0.053%
3/9/2026Corient Private Wealth LLC19,535$429K0.0%N/A0.029%
2/19/2026 Invesco Ltd.277,722$6.10M0.0%-8.1%0.410%
2/19/2026Corient Private Wealth LLC15,748$346K0.0%N/A0.023%
2/18/2026Mercer Global Advisors Inc. ADV11,294$248K0.0%N/A0.017%
2/18/2026State of Tennessee Department of Treasury21,514$473K0.0%-33.4%0.032%
2/18/2026EP Wealth Advisors LLC9,977$219K0.0%N/A0.015%
2/18/2026Wellington Management Group LLP98,309$2.16M0.0%N/A0.145%
2/18/2026Susquehanna Portfolio Strategies LLC66,452$1.46M0.0%-67.8%0.098%
2/18/2026Millennium Management LLC583,573$12.83M0.0%-17.3%0.861%
2/18/2026Man Group plc12,782$281K0.0%N/A0.019%
2/18/2026 Inspire Investing LLC21,066$463K0.0%-45.2%0.031%
2/18/2026Engineers Gate Manager LP88,547$1.95M0.0%N/A0.131%
2/18/2026Balyasny Asset Management L.P.262,788$5.78M0.0%N/A0.388%
2/17/2026Freestone Grove Partners LP1,442,836$31.71M0.2%-22.9%2.128%
2/17/2026Schonfeld Strategic Advisors LLC14,590$321K0.0%-89.8%0.022%
2/17/2026PDT Partners LLC110,385$2.43M0.2%-35.2%0.163%
2/17/2026AQR Capital Management LLC339,579$7.46M0.0%-18.2%0.501%
2/17/2026Cetera Investment Advisers10,937$240K0.0%-21.5%0.016%
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2/17/2026First Light Asset Management LLC1,089,493$23.95M1.8%N/A1.607%
2/17/2026ArrowMark Colorado Holdings LLC2,889,691$63.52M1.4%-21.7%4.262%
2/17/2026Trexquant Investment LP102,719$2.26M0.0%-79.4%0.151%
2/17/2026Amundi29,445$647K0.0%+167.1%0.043%
2/17/2026Price T Rowe Associates Inc. MD56,809$1.25M0.0%-13.7%0.084%
2/17/2026Adage Capital Partners GP L.L.C.182,995$4.02M0.0%N/A0.270%
2/17/2026California State Teachers Retirement System64,411$1.42M0.0%+6.3%0.095%
2/17/2026 Russell Investments Group Ltd.128,660$2.83M0.0%-6.5%0.190%
2/17/2026 Maryland State Retirement & Pension System9,855$217K0.0%N/A0.015%
2/17/2026State of Wisconsin Investment Board43,090$947K0.0%-33.4%0.064%
2/17/2026Captrust Financial Advisors13,111$288K0.0%+7.0%0.019%
2/17/2026Royal Bank of Canada208,528$4.58M0.0%-69.4%0.308%
2/17/2026Rice Hall James & Associates LLC62,415$1.37M0.1%-39.1%0.092%
2/16/2026Verition Fund Management LLC10,587$233K0.0%-54.1%0.016%
2/16/2026Panagora Asset Management Inc.146,234$3.21M0.0%-25.1%0.216%
2/16/2026Mariner LLC35,529$781K0.0%+43.2%0.052%
2/13/2026Marshall Wace LLP875,531$19.24M0.0%N/A1.291%
2/13/2026The Manufacturers Life Insurance Company 29,720$653K0.0%-6.0%0.044%
2/13/2026Formula Growth Ltd.70,919$1.56M0.6%-41.9%0.105%
2/13/2026 Stifel Financial Corp27,485$604K0.0%-29.6%0.041%
2/13/2026Quarry LP1,437$32K0.0%-61.1%0.002%
2/13/2026Smartleaf Asset Management LLC1,330$30K0.0%+80.5%0.002%
2/13/2026Jacobs Levy Equity Management Inc.1,653,708$36.35M0.1%+11.6%2.439%
2/13/2026Public Sector Pension Investment Board234,673$5.16M0.0%-11.0%0.346%
2/13/2026Nierenberg Investment Management Company LLC44,555$979K0.5%N/A0.066%
2/13/2026Charles Schwab Investment Management Inc.646,310$14.21M0.0%+15.7%0.953%
2/13/2026State Street Corp2,641,724$58.07M0.0%-1.0%3.896%
2/13/2026Van ECK Associates Corp3,430$75K0.0%+67.4%0.005%
2/13/2026Ieq Capital LLC27,178$597K0.0%N/A0.040%
2/13/2026 Caitong International Asset Management Co. Ltd1,321$29K0.1%-40.1%0.002%
2/13/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC164,902$3.63M0.0%-10.8%0.243%
2/13/2026 Wells Fargo & Company MN84,411$1.86M0.0%+61.8%0.125%
2/12/2026Advisors Asset Management Inc.23,776$523K0.0%-2.2%0.035%
2/12/2026Orion Porfolio Solutions LLC40,579$892K0.0%-7.7%0.060%
2/12/2026 Counterpoint Mutual Funds LLC22,858$502K0.0%-45.9%0.034%
2/12/2026EntryPoint Capital LLC9,477$208K0.1%N/A0.014%
2/12/2026Ensign Peak Advisors Inc5,032$111K0.0%-70.7%0.007%
2/12/2026 Sector Gamma AS267,091$5.87M1.3%-0.9%0.394%
2/12/2026 Swiss National Bank133,300$2.93M0.0%+3.3%0.197%
2/11/2026 Deutsche Bank AG54,230$1.19M0.0%-1.0%0.080%
2/11/2026GW&K Investment Management LLC2,675,157$58.80M0.5%-1.7%3.946%
2/11/2026 Fox Run Management L.L.C.11,398$251K0.0%N/A0.017%
2/11/2026 LPL Financial LLC39,590$870K0.0%+1.8%0.058%
2/11/2026Franklin Resources Inc.27,897$613K0.0%-31.6%0.041%
2/11/2026 WINTON GROUP Ltd44,244$972K0.0%N/A0.065%
2/11/2026State of Wyoming31,798$699K0.1%+111.4%0.047%
2/10/2026Goldman Sachs Group Inc.1,683,400$37.00M0.0%+17.6%2.483%
2/10/2026Natixis Advisors LLC57,021$1.25M0.0%+1.1%0.084%
2/10/2026 BNP Paribas Financial Markets1,248,481$27.44M0.0%+468.5%1.841%
2/10/2026 Norges Bank54,306$1.19M0.0%N/A0.080%
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2/10/2026 Intech Investment Management LLC27,371$602K0.0%-62.8%0.040%
2/9/2026Geode Capital Management LLC1,649,383$36.26M0.0%+3.2%2.433%
2/9/2026 Royce & Associates LP650,250$14.29M0.1%+27.5%0.959%
2/9/2026 Legal & General Group Plc171,861$3.78M0.0%-5.8%0.253%
2/9/2026 Lisanti Capital Growth LLC262,885$5.78M1.4%N/A0.388%
2/6/2026Mizuho Markets Americas LLC144,617$3.18M0.1%+23.2%0.213%
2/6/2026Legato Capital Management LLC72,580$1.60M0.1%N/A0.107%
2/6/2026 Leonteq Securities AG7,806$172K0.0%N/A0.012%
2/6/2026 Creative Financial Designs Inc. ADV3,431$75K0.0%+36.0%0.005%
2/6/2026 PNC Financial Services Group Inc.22,347$491K0.0%+5.6%0.033%


TNDM Institutional Ownership - Frequently Asked Questions

During the previous two years, 319 institutional investors and hedge funds held shares of Tandem Diabetes Care. The most heavily invested institutionals were Vanguard Group Inc. ($161.36M), Sessa Capital IM L.P. ($85.57M), ArrowMark Colorado Holdings LLC ($63.52M), GW&K Investment Management LLC ($58.80M), State Street Corp ($58.07M), Hood River Capital Management LLC ($47.81M), and Paradice Investment Management LLC ($45.67M).Learn more on Tandem Diabetes Care's institutional investors.

Of the 272 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), Freestone Grove Partners LP ($2.05M), Hood River Capital Management LLC ($1.53M), Ophir Asset Management Pty Ltd ($1.46M), First Light Asset Management LLC ($1.44M), Assenagon Asset Management S.A. ($1.41M), and ArrowMark Colorado Holdings LLC ($1.33M).

Institutional investors have bought a total of 23,171,550 shares in the last 24 months. This purchase volume represents approximately $425.43M in transactions.

Of the 102 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: BNP Paribas Financial Markets ($9.80M), JPMorgan Chase & Co. ($1.41M), Invesco Ltd. ($1.28M), Assenagon Asset Management S.A. ($1.05M), Universal Beteiligungs und Servicegesellschaft mbH ($998.73K), ArrowMark Colorado Holdings LLC ($801.51K), and Balyasny Asset Management L.P. ($538.81K).

Institutional investors have sold a total of 23,918,262 shares in the last 24 months. This volume of shares sold represents approximately $377.83M in transactions.


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This page (NASDAQ:TNDM) was last updated on 5/14/2026 by MarketBeat.com Staff.
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