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TANDEM DIABETES CARE INC hedge fund holdings

TNDMNASDAQ
$16.52+0.02 (+0.12%)as of Oct 5, 2026

Every quarter, large institutional investment managers with over $100M in U.S.-listed assets under management disclose their U.S. equity holdings through 13F filings. Read together, those filings show which businesses professional capital is moving into and out of.

Price vs funds buying and selling

TNDM · close · 13FReported Aug 14, 2026

Price vs funds buying and selling data

Showing the 1Y range: Oct 6, 2025 to Oct 5, 2026. Price (+10.1%). 0 fund reports plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
DateCategoryPersonRoleActionAmountChange in holding
Funds buying · new + increased
Funds selling · reduced + closed
Net buyers vs sellers
Buying = new + increased; selling = reduced + closed. Counts exclude position changes under 5% of the fund's holding last quarter.

Price and fund activity data

Quarterly 13F fund buying and selling activity
QuarterFunds buyingFunds sellingBoughtSoldFilersReported
Q2 202511684$235M$126M247Aug 14, 2025
Q3 202587116$127M$181M239Nov 14, 2025
Q4 202599101$275M$271M253Feb 14, 2026
Q1 202610782$224M$155M262May 15, 2026
Q2 2026106100$221M$218M260Aug 14, 2026

Quarterly action breakdown

Q2 2026
260 filers
New position
39
$52.5M+3.48M sh
Increased
67
$169M+11.2M sh
Reduced
65
-$156M-10.3M sh
Out / sold
35
-$62.1M-4.12M sh
Last 4 quarters · free
Reported Aug 14, 2026
FundActionChange in dollarValue% of portfolioReported
First Light Asset Management, LLCAdded 157.36%+$31.2M$51.1M3.10%Aug 14, 2026
ArrowMark Colorado Holdings LLCReduce 58.13%-$27.2M$19.6M0.82%Aug 13, 2026
Baillie Gifford & CoSell 100%-$20.9M$00.00%Aug 6, 2026
Defilade Capital Management, L.P.Sell 100%-$14.6M$00.00%Aug 14, 2026
Jennison Associates LLCAdded 40.58%+$10.2M$35.2M0.02%Aug 3, 2026
Freestone Grove Partners LPAdded 40.23%+$8.08M$28.2M0.18%Aug 14, 2026
Driehaus Capital Management LLCReduce 22.45%-$7.81M$27M0.16%Aug 14, 2026
Quantinno Capital Management LPReduce 53.10%-$5.24M$4.63M0.01%Aug 13, 2026
KVP Capital Advisors, LPNew Buy+$4.54M$4.54M3.33%Aug 13, 2026
Meridiem Capital Partners LPNew Buy+$4.5M$4.5M0.20%Aug 14, 2026
Lisanti Capital Growth, LLCSell 100%-$3.17M$00.00%Aug 10, 2026
Holocene Advisors, LPReduce 43.89%-$3.16M$4.04M0.01%Aug 14, 2026
Wellington Management Group LLPReduce 16.39%-$2.58M$13.2M0.00%Aug 14, 2026
Canada Pension Plan Investment BoardSell 100%-$2.27M$00.00%Aug 14, 2026
Susquehanna Portfolio Strategies, LLCReduce 66.59%-$2.07M$1.04M0.02%Aug 14, 2026
Banco Santander, S.A.Added 974.45%+$2.01M$2.22M0.01%Jul 29, 2026
Jefferies Financial Group Inc.Added 193.52%+$1.66M$2.51M0.02%Aug 17, 2026
Rice Hall James & Associates, LLCSell 100%-$1.4M$00.00%Aug 7, 2026
Fideuram - Intesa Sanpaolo Private Banking S.P.A.New Buy+$1.28M$1.28M0.04%Jul 23, 2026
Nierenberg Investment Management Company, LLCAdded 99.86%+$1.2M$2.4M1.19%Aug 11, 2026
PDT Partners, LLCReduce 80.98%-$1.15M$269K0.01%Aug 14, 2026
Edmond de Rothschild Holding S.A.Added 19.36%+$755K$4.65M0.06%Aug 10, 2026
First Trust Advisors LPReduce 14.55%-$752K$4.42M0.00%Aug 11, 2026
Fox Run Management, L.L.C.New Buy+$611K$611K0.10%Aug 4, 2026
VARCOV Co.Sell 100%-$509K$00.00%Aug 14, 2026
Diversified Trust CoSell 100%-$409K$00.00%Jul 17, 2026
Allstate CorpNew Buy+$390K$390K0.00%Aug 13, 2026
Cinctive Capital Management LPAdded 36.19%+$348K$1.31M0.05%Aug 14, 2026
Summit Trail Advisors, LLCAdded 58.60%+$334K$903K0.01%Aug 11, 2026
Summit Global InvestmentsNew Buy+$328K$328K0.02%Aug 3, 2026
Rhenman & Partners Asset Management ABNew Buy+$302K$302K0.03%Aug 13, 2026
Mizuho Markets Americas LLCReduce 12.46%-$296K$2.08M0.03%Jul 24, 2026
Paradice Investment Management LLCReduce 0.90%-$278K$30.5M4.87%Aug 5, 2026
Inspire Investing, LLCAdded 63.26%+$258K$665K0.03%Aug 12, 2026
Frontier Capital Management Co LLCReduce 4.22%-$253K$5.74M0.05%Aug 14, 2026
Evergreen Capital Management LLCSell 100%-$249K$00.00%Jul 23, 2026
Syon Capital LLCSell 100%-$219K$00.00%Aug 14, 2026
Redhawk Wealth Advisors, Inc.New Buy+$207K$207K0.02%Jul 9, 2026
Park Avenue Securities LLCSell 100%-$204K$00.00%Jul 20, 2026
New Age Alpha Advisors, LLCNew Buy+$194K$194K0.01%Aug 13, 2026
Beaconlight Capital, LLCAdded 4.78%+$183K$4.01M1.42%Aug 14, 2026
Proficio Capital Partners LLCNew Buy+$180K$180K0.01%Aug 17, 2026
Banque Pictet & Cie SAReduce 9.36%-$175K$1.7M0.01%Jul 24, 2026
Leonteq Securities AGAdded 116.06%+$166K$310K0.01%Jul 27, 2026
Bridgefront Capital, LLCNew Buy+$164K$164K0.04%Aug 14, 2026
State of Alaska, Department of RevenueReduce 28.87%-$163K$402K0.00%Jul 20, 2026
180 Wealth Advisors, LLCAdded 58.18%+$138K$376K0.04%Jul 7, 2026
Greenwood Capital Associates LLCAdded 65.54%+$138K$348K0.03%Jul 28, 2026
Aberdeen Group plcAdded 1.78%+$116K$6.67M0.01%Jul 31, 2026
Public Sector Pension Investment BoardReduce 2.94%-$108K$3.55M0.01%Aug 13, 2026
China Universal Asset Management Co., Ltd.Reduce 90.00%-$67.9K$7.55K0.00%Jul 24, 2026
Van Eck Associates CorpSell 100%-$56K$00.00%Aug 14, 2026
Bayforest Capital LtdReduce 47.80%-$52.4K$57.2K0.05%Aug 5, 2026
Versant Capital Management, IncReduce 90.16%-$45.4K$4.95K0.00%Jul 2, 2026
OP Asset Management LtdSell 100%-$35.2K$00.00%Jul 28, 2026
Cresset Asset Management, LLCReduce 11.94%-$22.7K$168K0.00%Aug 14, 2026
Aster Capital Management (DIFC) LtdReduce 52.30%-$14.4K$13.2K0.00%Aug 14, 2026
MassMutual Private Wealth & Trust, FSBNew Buy+$10.7K$10.7K0.00%Jul 2, 2026
Kemnay Advisory Services Inc.Sell 100%-$10.3K$00.00%Aug 14, 2026
Formula Growth LtdReduce 0.74%-$7.91K$1.06M0.37%Aug 17, 2026
Beacon Investment Advisory Services, Inc.Sell 100%-$4.6K$00.00%Jul 8, 2026
Fulcrum Asset Management LLPNew Buy+$4.43K$4.43K0.00%Aug 18, 2026
Thrivent Financial for LutheransReduce 0.56%-$3.85K$679K0.00%Aug 14, 2026
BNP PARIBAS ASSET MANAGEMENT Holding S.A.Reduce 18.55%-$3.77K$16.6K0.00%Aug 13, 2026
Oppenheimer Asset Management Inc.Added 0.53%+$3.29K$619K0.01%Aug 3, 2026
Salomon & Ludwin, LLCReduce 23.32%-$2.85K$9.37K0.00%Aug 7, 2026
Twin Peaks Wealth Advisors, LLCSell 100%-$2.72K$00.00%Aug 13, 2026
Guggenheim Capital LLCReduce 1.36%-$2.54K$184K0.00%Aug 12, 2026
Natixis Advisors, LLCReduce 0.21%-$1.93K$919K0.00%Aug 14, 2026
Virtus Advisers, LLCAdded 2.52%+$1.68K$68.1K0.03%Aug 11, 2026
Continuum Advisory, LLCNew Buy+$1.51K$1.51K0.00%Aug 6, 2026
Oregon Public Employees Retirement FundAdded 0.64%+$1.51K$235K0.00%Jul 29, 2026
Colonial Trust Co / SCAdded 76.23%+$1.47K$3.4K0.00%Aug 11, 2026
Quarry LPNew Buy+$1.45K$1.45K0.00%Aug 14, 2026
Archer Investment CorpNew Buy+$1.36K$1.36K0.00%Aug 19, 2026
Commerce BankReduce 0.39%-$966$246K0.00%Aug 12, 2026
Yousif Capital Management, LLCAdded 0.30%+$830$279K0.00%Jul 16, 2026
IFG Advisory, LLCNew Buy+$755$7550.00%Aug 14, 2026
Ritter Daniher Financial Advisory LLC / DENew Buy+$755$7550.00%Jul 14, 2026
Elevation Wealth Partners, LLCAdded 328.57%+$695$9060.00%Jul 8, 2026
Bell Investment Advisors, IncSell 100%-$691$00.00%Aug 7, 2026
Signature Equity Partners, LLCNew Buy+$619$6190.00%Jul 30, 2026
Silver Grove Financial Group, Inc.New Buy+$407$4070.00%Aug 13, 2026
Aventura Private Wealth, LLCNew Buy+$241$2410.00%Jul 15, 2026
Pinnacle Wealth Planning Services, Inc.Added 0.42%+$196$46.6K0.00%Aug 7, 2026
JFS Wealth Advisors, LLCAdded 60.00%+$136$3630.00%Jul 10, 2026
UMB Bank, n.a.Reduce 1.58%-$106$6.59K0.00%Aug 13, 2026
Abound Wealth ManagementSell 100%-$96$00.00%Jul 10, 2026
Davis Capital ManagementNew Buy+$60$600.00%Jul 16, 2026
Gilpin Wealth Management, LLCReduce 25.00%-$45$1360.00%Jul 24, 2026

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