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Tandem Diabetes Care (TNDM) Institutional Ownership

Tandem Diabetes Care logo
$20.25 +0.75 (+3.87%)
As of 02:23 PM Eastern
This is a fair market value 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)
138
Total
Institutional Inflows
(last 12 months)
$350.31M
Number of
Institutional Sellers
(last 12 months)
93
Total
Institutional Outflows
(last 12 months)
$355.13M
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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
7/10/2026 Redhawk Wealth Advisors Inc.13,731$207K0.0%N/A0.020%
7/8/2026 Assenagon Asset Management S.A.26,430$399K0.0%-85.2%0.039%
7/7/2026 180 Wealth Advisors LLC24,934$376K0.0%+58.2%0.036%
7/7/2026 GAMMA Investing LLC1,644$25K0.0%-53.1%0.002%
6/12/2026Defilade Capital Management L.P.761,905$14.61M2.1%N/A1.112%
5/19/2026Bank of America Corp DE373,224$7.16M0.0%-46.9%0.545%
5/18/2026Amundi12,615$242K0.0%-57.2%0.018%
5/18/2026California State Teachers Retirement System84,255$1.62M0.0%+30.8%0.123%
5/18/2026Royal Bank of Canada206,033$3.95M0.0%-1.2%0.301%
5/16/2026The Manufacturers Life Insurance Company 28,722$551K0.0%-3.4%0.042%
5/16/2026Quantinno Capital Management LP653,870$12.54M0.0%+123.5%0.954%
5/16/2026First Light Asset Management LLC1,314,715$25.20M2.3%+20.7%1.918%
5/15/2026Rice Hall James & Associates LLC72,878$1.40M0.1%+16.8%0.106%
5/14/2026Renaissance Technologies LLC58,227$1.12M0.0%N/A0.085%
5/14/2026Gabelli Funds LLC25,000$479K0.0%N/A0.036%
5/14/2026Beaconlight Capital LLC253,877$4.87M2.6%N/A0.370%
5/14/2026Arrowstreet Capital Limited Partnership193,556$3.71M0.0%+42.6%0.282%
5/14/2026 Mizuho Markets Americas LLC157,362$3.02M0.1%+8.8%0.230%
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%
5/8/2026PNC Financial Services Group Inc.20,817$399K0.0%-6.8%0.030%
5/6/2026Jennison Associates LLC1,658,448$31.79M0.0%-18.0%2.421%
5/5/2026Bank of New York Mellon Corp336,291$6.45M0.0%-3.8%0.491%
5/4/2026Principal 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%
5/1/2026Fifth 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%
4/23/2026Inspire 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%
4/16/2026SG Americas Securities LLC33,022$633K0.0%-46.7%0.048%
4/16/2026 Diversified Trust Co21,332$409K0.0%+9.1%0.031%
3/20/2026Hsbc Holdings PLC36,553$810K0.0%-60.7%0.053%
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3/9/2026Corient Private Wealth LLC19,535$429K0.0%N/A0.029%
2/19/2026Invesco 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%
2/18/2026Inspire 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%
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%
2/17/2026Russell 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%
2/13/2026Stifel 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%
2/13/2026Caitong 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%
2/13/2026Wells Fargo & Company MN84,411$1.86M0.0%+61.8%0.125%
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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%
2/12/2026Sector Gamma AS267,091$5.87M1.3%-0.9%0.394%
2/12/2026Swiss National Bank133,300$2.93M0.0%+3.3%0.197%
2/11/2026Deutsche 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%
2/11/2026Fox Run Management L.L.C.11,398$251K0.0%N/A0.017%


TNDM Institutional Ownership - Frequently Asked Questions

During the previous two years, 314 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 266 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), First Light Asset Management LLC ($1.55M), Hood River Capital Management LLC ($1.53M), Ophir Asset Management Pty Ltd ($1.46M), ArrowMark Colorado Holdings LLC ($1.33M), and Assenagon Asset Management S.A. ($1.33M).

Institutional investors have bought a total of 19,242,970 shares in the last 24 months. This purchase volume represents approximately $350.31M in transactions.

Of the 93 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. ($1.20M), 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 22,763,517 shares in the last 24 months. This volume of shares sold represents approximately $355.13M in transactions.


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This page (NASDAQ:TNDM) was last updated on 8/3/2026 by MarketBeat.com Staff.
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