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Tandem Diabetes Care (TNDM) Institutional Ownership

Tandem Diabetes Care logo
$15.40 -0.18 (-1.16%)
Closing price 08/1/2025 04:00 PM Eastern
Extended Trading
$15.69 +0.29 (+1.88%)
As of 08/1/2025 07:56 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)
204
Total
Institutional Inflows
(last 12 months)
$690.28M
Number of
Institutional Sellers
(last 12 months)
114
Total
Institutional Outflows
(last 12 months)
$695.08M
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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
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%
7/31/2025 Nisa Investment Advisors LLC4,171$78K0.0%+186.9%0.006%
7/31/2025 Oppenheimer Asset Management Inc.54,041$1.01M0.0%-25.7%0.081%
7/31/2025 AlphaQuest LLC17,371$324K0.0%+102.9%0.026%
7/31/2025 Sector Gamma AS210,523$3.92M1.3%+16.6%0.316%
7/30/2025 Stephens Investment Management Group LLC1,737,769$32.39M0.4%+1.8%2.609%
7/29/2025 VIRGINIA RETIREMENT SYSTEMS ET Al36,900$688K0.0%N/A0.055%
7/28/2025 Bayforest Capital Ltd9,271$173K0.1%-64.7%0.014%
7/25/2025 CWM LLC2,796$52K0.0%+262.6%0.004%
7/24/2025 Inspire Investing LLC20,843$389K0.0%+16.5%0.031%
7/24/2025 US Bancorp DE35,360$659K0.0%-17.2%0.053%
7/21/2025 HighMark Wealth Management LLC23,670$441K0.2%-6.0%0.036%
7/18/2025 Truist Financial Corp123,531$2.30M0.0%-10.8%0.185%
7/16/2025 State of Alaska Department of Revenue39,660$739K0.0%+9.0%0.060%
7/16/2025 Banque Pictet & Cie SA84,028$1.57M0.0%N/A0.126%
7/14/2025 Park Avenue Securities LLC10,938$204K0.0%-6.6%0.016%
7/11/2025 Farther Finance Advisors LLC2,637$49K0.0%-35.9%0.004%
7/11/2025 Diversified Trust Co16,348$305K0.0%+11.8%0.025%
7/11/2025 Assenagon 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%
6/3/2025 Inspire Investing LLC17,893$343K0.0%N/A0.027%
5/21/2025Acadian Asset Management LLC232,872$4.46M0.0%N/A0.350%
5/19/2025 Bayforest 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%
5/16/2025Park West Asset Management LLC1,123,052$21.52M1.7%-29.8%1.686%
5/16/2025Millennium Management LLC227,585$4.36M0.0%+41.1%0.342%
5/16/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.74,413$1.43M0.0%+2.9%0.112%
5/16/2025Jacobs Levy Equity Management Inc.1,471,569$28.20M0.1%-11.4%2.209%
5/16/2025Edmond DE Rothschild Holding S.A.252,600$4.84M0.1%N/A0.379%
5/16/2025AQR Capital Management LLC12,069$230K0.0%-13.2%0.018%
5/16/2025Advisors Asset Management Inc.22,460$430K0.0%+8.0%0.034%
5/16/2025Amundi25,184$445K0.0%-64.0%0.038%
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5/15/2025First Light Asset Management LLC245,257$4.70M0.5%-16.0%0.368%
5/15/2025Royal Bank of Canada211,666$4.05M0.0%+30.5%0.318%
5/15/2025DAFNA Capital Management LLC294,208$5.64M1.6%+31.8%0.442%
5/15/2025Kingdon Capital Management L.L.C.495,229$9.49M1.0%-37.4%0.744%
5/15/2025State of Wyoming4,467$86K0.0%+49.1%0.007%
5/15/2025Landscape Capital Management L.L.C.35,942$689K0.1%+83.1%0.054%
5/15/2025Champlain Investment Partners LLC1,368,888$26.23M0.2%-0.8%2.055%
5/14/2025Corebridge Financial Inc.34,290$657K0.0%-1.9%0.051%
5/14/2025Comerica Bank29,692$569K0.0%+6.2%0.045%
5/14/2025MetLife Investment Management LLC39,091$749K0.0%-1.5%0.059%
5/14/2025 AlphaQuest LLC8,561$164K0.0%+819.5%0.013%
5/14/2025Capital Fund Management S.A.38,857$744K0.0%-80.6%0.058%
5/14/2025Hsbc Holdings PLC14,144$270K0.0%-49.1%0.021%
5/13/2025Northern Trust Corp689,534$13.21M0.0%-1.1%1.035%
5/13/2025Brooklyn Investment Group3,397$65K0.0%+417.8%0.005%
5/13/2025Versor Investments LP30,500$584K0.1%N/A0.046%
5/13/2025Algert Global LLC209,320$4.01M0.1%+133.8%0.314%
5/13/2025Raymond James Financial Inc.186,628$3.58M0.0%+14.1%0.280%
5/13/2025 Sector Gamma AS180,523$3.46M1.1%N/A0.271%
5/13/2025 Aberdeen Group plc356,218$6.83M0.0%+43.1%0.535%
5/13/2025Russell Investments Group Ltd.139,094$2.67M0.0%-52.1%0.209%
5/13/2025HighTower Advisors LLC67,168$1.29M0.0%+604.6%0.101%
5/12/2025Public Sector Pension Investment Board208,231$3.99M0.0%+27.0%0.313%
5/12/2025Nuveen LLC308,315$5.91M0.0%N/A0.463%
5/12/2025Mizuho Markets Americas LLC115,772$2.22M0.0%+36.1%0.174%
5/12/2025Connor Clark & Lunn Investment Management Ltd.644,988$12.36M0.1%+25.2%0.968%
5/12/2025Swiss National Bank127,300$2.44M0.0%-1.1%0.191%
5/12/2025 Maryland State Retirement & Pension System19,137$367K0.0%-13.4%0.029%
5/9/2025Deutsche Bank AG54,164$1.04M0.0%-12.3%0.081%
5/9/2025Charles Schwab Investment Management Inc.570,150$10.92M0.0%-5.3%0.856%
5/9/2025Vanguard Group Inc.7,292,169$139.72M0.0%-2.0%10.948%
5/9/2025iA Global Asset Management Inc.165,380$3.17M0.1%N/A0.248%
5/9/2025PNC Financial Services Group Inc.19,235$369K0.0%-13.5%0.029%
5/9/2025Jupiter Asset Management Ltd.87,815$1.68M0.0%N/A0.132%
5/8/2025Commerce Bank31,767$609K0.0%+18.1%0.048%
5/8/2025Jefferies Financial Group Inc.11,668$224K0.0%+27.4%0.018%
5/8/2025 US Bancorp DE42,688$818K0.0%+10.3%0.064%
5/8/2025 Bayforest Capital Ltd26,288$504K0.2%+197.0%0.039%
5/8/2025 GSA Capital Partners LLP130,595$2.50M0.2%N/A0.196%
5/7/2025Zurcher Kantonalbank Zurich Cantonalbank 21,449$411K0.0%+19.5%0.032%
5/7/2025Baillie Gifford & Co.732,574$14.04M0.0%-1.8%1.100%
5/6/2025Assetmark Inc.1,750$34K0.0%+42.9%0.003%
5/6/2025Cetera Investment Advisers18,700$358K0.0%+31.8%0.028%
5/6/20251492 Capital Management LLC22,446$430K0.2%N/A0.034%
5/5/2025GW&K Investment Management LLC2,863,987$54.87M0.5%+34.9%4.303%
5/5/2025 Allianz Asset Management GmbH10,700$205K0.0%N/A0.016%
5/5/2025Hussman Strategic Advisors Inc.63,000$1.21M0.3%N/A0.095%
5/5/2025Jennison Associates LLC1,477,108$28.30M0.0%+0.7%2.219%
5/2/2025Victory Capital Management Inc.12,245$235K0.0%-97.8%0.018%
5/2/2025 Apollon Wealth Management LLC11,074$212K0.0%-25.2%0.017%
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5/2/2025 Signaturefd LLC1,698$33K0.0%-25.0%0.003%
5/1/2025Rice Hall James & Associates LLC104,956$2.01M0.1%-0.5%0.158%
5/1/2025 Louisiana State Employees Retirement System30,900$592K0.0%-2.8%0.046%
5/1/2025 Stephens Investment Management Group LLC1,706,915$32.70M0.5%+9.7%2.564%
4/30/2025Cerity Partners LLC76,005$1.46M0.0%+32.2%0.114%
4/30/2025Brown Advisory Inc.925,310$17.73M0.0%+1.3%1.390%
4/29/2025Envestnet Asset Management Inc.318,530$6.10M0.0%+25.4%0.479%
4/28/2025Principal Financial Group Inc.399,450$7.65M0.0%+2.9%0.600%
4/28/2025Teacher Retirement System of Texas32,465$622K0.0%+17.8%0.049%
4/25/2025KBC Group NV193,808$3.71M0.0%+0.7%0.291%
(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, 303 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), Geode Capital Management LLC ($55.26M), and GW&K Investment Management LLC ($54.87M).Learn more on Tandem Diabetes Care's institutional investors.

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

Of the 252 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 ($2.75M), Eminence Capital LP ($2.37M), GW&K Investment Management LLC ($2.29M), Paradice Investment Management LLC ($1.57M), Hood River Capital Management LLC ($1.28M), and Chicago Capital LLC ($1.12M).

How much institutional buying is happening at Tandem Diabetes Care?

Institutional investors have bought a total of 22,491,798 shares in the last 24 months. This purchase volume represents approximately $690.28M in transactions.

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

Of the 114 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: Marshall Wace LLP ($2.60M), Capital World Investors ($2.50M), Janus Henderson Group PLC ($1.42M), Bellevue Group AG ($1.07M), Chicago Capital LLC ($982.42K), Jacobs Levy Equity Management Inc. ($858.91K), and Divisadero Street Capital Management LP ($834.07K).

How much institutional selling is happening at Tandem Diabetes Care?

Institutional investors have sold a total of 20,201,619 shares in the last 24 months. This volume of shares sold represents approximately $695.08M in transactions.


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This page (NASDAQ:TNDM) was last updated on 8/2/2025 by MarketBeat.com Staff
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