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Tandem Diabetes Care Inc

TNDM
Exchange
Nasdaq
Industry
Surgical & Medical Instruments & Apparatus
SEC CIK
0001438133

No open-market purchases or sales by Tandem Diabetes Care Inc insiders were filed in the last 90 days; 274 institutions reported holding it in 13F filings for Q2 2026, worth $1.19B in total; no superinvestor holds it.

13F holders, Q3 2021

Institutional positions in Tandem Diabetes Care Inc as of Sep 30, 2021. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
338
+41 vs. Q2 2021
Shares held
61.3M
+2.48M (+4.2%) vs. Q2 2021
Total value
$7.32B
+$1.59B (+27.8%) vs. Q2 2021
New holders
80
106 more added
Sold out
39
106 more reduced

6 institutions that held it in Q2 2021 haven't filed for Q3 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 2021: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting TNDM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ3 2021: 338 institutions
Q1 2021: 290 institutionsQ2 2021: 303 institutionsQ3 2021: 338 institutionsQ4 2021: 388 institutionsQ1 2022: 379 institutionsQ2 2022: 331 institutionsQ3 2022: 299 institutionsQ4 2022: 295 institutionsQ1 2023: 274 institutionsQ2 2023: 247 institutionsQ3 2023: 226 institutionsQ4 2023: 268 institutionsQ1 2024: 291 institutionsQ2 2024: 317 institutionsQ3 2024: 332 institutionsQ4 2024: 316 institutionsQ1 2025: 275 institutionsQ2 2025: 271 institutionsQ3 2025: 255 institutionsQ4 2025: 269 institutionsQ1 2026: 274 institutionsQ2 2026: 274 institutions
Value heldQ3 2021: $7.32B
Q1 2021: $5.08BQ2 2021: $5.75BQ3 2021: $7.32BQ4 2021: $9.09BQ1 2022: $6.92BQ2 2022: $3.64BQ3 2022: $3.00BQ4 2022: $2.89BQ1 2023: $2.77BQ2 2023: $1.65BQ3 2023: $1.45BQ4 2023: $2.10BQ1 2024: $2.63BQ2 2024: $2.96BQ3 2024: $3.10BQ4 2024: $2.60BQ1 2025: $1.40BQ2 2025: $1.51BQ3 2025: $911.3MQ4 2025: $1.65BQ1 2026: $1.51BQ2 2026: $1.19B
Institutions holding TNDM and their total value by quarter
QuarterHoldersValue
Q2 2026274$1.19B
Q1 2026274$1.51B
Q4 2025269$1.65B
Q3 2025255$911.3M
Q2 2025271$1.51B
Q1 2025275$1.40B
Q4 2024316$2.60B
Q3 2024332$3.10B
Q2 2024317$2.96B
Q1 2024291$2.63B
Q4 2023268$2.10B
Q3 2023226$1.45B
Q2 2023247$1.65B
Q1 2023274$2.77B
Q4 2022295$2.89B
Q3 2022299$3.00B
Q2 2022331$3.64B
Q1 2022379$6.92B
Q4 2021388$9.09B
Q3 2021338$7.32B
Q2 2021303$5.75B
Q1 2021290$5.08B

Institutions, Q3 2021

Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q2 2021.

Institutions holding TNDM in Q3 2021
InstitutionSharesValue% of portfolioChange in sharesAction
Ausdal Financial Partners, Inc.7,510$897.0K0.13%−1,000−11.8%Reduced
Maverick Capital LtdSuperinvestorMaverick Capital7,320$874.0K0.01%+7,320New
Silvant Capital Management LLC7,307$872.0K0.16%00.0%Unchanged
Columbia Asset Management7,265$867.0K0.19%+1,480+25.6%Added
Shelton Capital Management7,200$860.0K0.03%−800−10.0%Reduced
Cambridge Investment Research Advisors, Inc.6,964$831.0K0.00%−200−2.8%Reduced
Verition Fund Management LLC6,820$814.0K0.01%+2,853+71.9%Added
HighTower Advisors, LLC6,625$783.0K0.00%+1,969+42.3%Added
Diversified Trust Co6,492$775.0K0.03%+246+3.9%Added
BNP Paribas Arbitrage, SA6,453$770.4K0.00%−16,273−71.6%Reduced
Oppenheimer & Co Inc6,341$757.0K0.01%−2,009−24.1%Reduced
Zurcher Kantonalbank (Zurich Cantonalbank)6,310$753.0K0.00%00.0%Unchanged
Cresset Asset Management, LLC6,000$716.0K0.01%00.0%Unchanged
Legal Advantage Investments, Inc.6,000$716.0K0.48%+1,000+20.0%Added
ProShare Advisors LLC5,847$698.0K0.00%+3,582+158.1%Added
Securian Asset Management, Inc5,652$675.0K0.01%+5,652New
The PNC Financial Services Group, Inc.5,600$669.0K0.00%+438+8.5%Added
Advisor Group Holdings, Inc.5,299$639.0K0.00%+312+6.3%Added
Partners Group Holding AG5,171$617.0K0.04%+5,171New
Acadian Asset Management LLC5,041$599.0K0.00%+4,669+1,255.1%Added
WealthTrust Axiom LLC5,000$596.0K0.20%−1,000−16.7%Reduced
Pictet & Cie (Europe) SA4,918$587.0K0.02%−473−8.8%Reduced
Bayesian Capital Management, LP4,900$585.0K0.17%+4,900New
Maryland State Retirement & Pension System4,800$581.0K0.02%00.0%Unchanged
Janney Montgomery Scott LLC4,699$561.0K0.00%−396−7.8%Reduced
Tocqueville Asset Management L.P.4,600$549.0K0.01%00.0%Unchanged
Spearhead Capital Advisors, LLC4,586$547.0K0.07%−16−0.3%Reduced
Pacer Advisors, Inc.4,541$542.0K0.01%+4,541New
Newbridge Financial Services Group, Inc.4,460$532.0K0.33%+110+2.5%Added
Bank Julius Baer & Co. Ltd, Zurich4,400$525.0K0.00%−5−0.1%Reduced
Landsberg, Bennett, & Dubbaneh LLC4,291$520.0K0.07%+4,291New
Canada Pension Plan Investment Board4,264$509.0K0.00%+957+28.9%Added
Synovus Financial Corp4,139$499.0K0.01%+4,139New
FORA Capital, LLC4,175$498.0K0.13%−701−14.4%Reduced
Range Financial Group LLC4,154$496.0K0.36%+4,154New
Trexquant Investment LP4,140$494.0K0.04%−4,548−52.3%Reduced
HSBC Holdings PLC3,980$477.0K0.00%−10,379−72.3%Reduced
First Manhattan Co4,000$477.0K0.00%00.0%Unchanged
Vontobel Holding Ltd.3,917$468.0K0.00%+3,917New
O'Neil Global Advisors, Inc.3,825$457.0K0.35%+3,825New
Captrust Financial Advisors3,768$450.0K0.00%−43−1.1%Reduced
Profund Advisors LLC3,768$450.0K0.02%+3,768New
JB Capital LLC3,762$449.0K0.06%+3,762New
Sumitomo Mitsui Trust Holdings, Inc.3,700$442.0K0.00%−2,700−42.2%Reduced
Sigma Planning Corp3,664$437.0K0.01%−243−6.2%Reduced
New York State Teachers Retirement System3,587$428.0K0.00%+3,587New
Capital International Sarl3,551$424.0K0.04%−175−4.7%Reduced
Prelude Capital Management, LLC3,519$420.0K0.02%−7,726−68.7%Reduced
Bluestein R H & Co3,513$419.0K0.02%00.0%Unchanged
DuPont Capital Management Corp3,438$410.0K0.01%−930−21.3%Reduced
Tower Research Capital LLC (TRC)3,359$401.0K0.01%+1,754+109.3%Added
Utah Retirement Systems3,200$382.0K0.01%00.0%Unchanged
Creative Planning3,171$379.0K0.00%00.0%Unchanged
Zions Bancorporation, N.A.3,123$373.0K0.04%+3,123New
SG3 Management, LLC3,000$358.0K0.13%+3,000New
Harbor Financial Services, LLC2,903$347.0K0.15%−250−7.9%Reduced
Northwestern Mutual Wealth Management Co2,802$335.0K0.00%+2+0.1%Added
Boothbay Fund Management, LLC2,714$324.0K0.01%+178+7.0%Added
Connacht Asset Management LP2,660$318.0K0.36%−1,048−28.3%Reduced
First Mercantile Trust Co2,607$312.0K0.04%−222−7.8%Reduced
MML Investors Services, LLC2,563$306.0K0.00%+151+6.3%Added
Keebeck Alpha, LP2,537$303.0K0.09%+2,537New
PEAK6 Investments LLC2,472$295.0K0.01%+2,472New
CIBC Asset Management Inc2,452$293.0K0.00%+171+7.5%Added
Thoroughbred Financial Services, LLC2,323$277.0K0.07%00.0%Unchanged
XTX Topco Ltd2,232$266.0K0.09%−619−21.7%Reduced
Appleton Partners Inc2,225$266.0K0.02%00.0%Unchanged
Aubrey Capital Management Ltd2,205$263.2K0.08%+605+37.8%Added
Los Angeles Capital Management LLC2,154$257.0K0.00%00.0%Unchanged
Bridgewater Advisors Inc.2,100$251.0K0.07%+2,100New
World Asset Management Inc2,086$249.0K0.02%+2,086New
Axiom Investment Management LLC2,000$239.0K0.24%+2,000New
Mount Yale Investment Advisors, LLC1,992$238.0K0.03%−393−16.5%Reduced
Cigna Investments Inc1,978$236.0K0.02%+1,978New
Truist Financial Corp1,925$230.0K0.00%+1,925New
Capula Management Ltd1,870$223.0K0.02%−7,356−79.7%Reduced
Clarkston Capital Partners, LLC1,802$215.0K0.00%+1,802New
Chicago Partners Investment Group LLC1,607$215.0K0.02%+1,607New
IBM Retirement Fund1,754$209.0K0.02%+1,754New
CIBC World Markets Inc.1,739$208.0K0.00%+1,739New
Crossmark Global Holdings, Inc.1,740$208.0K0.00%+1,740New
Walleye Trading LLC1,709$204.0K0.00%−2,815−62.2%Reduced
AQR Capital Management LLC1,705$204.0K0.00%+1,705New
Global Retirement Partners, LLC1,684$201.0K0.02%00.0%Unchanged
Arkadios Wealth Advisors1,131$135.0K0.02%00.0%Unchanged
GPS Wealth Strategies Group, LLC1,098$131.0K0.03%−9−0.8%Reduced
Salem Investment Counselors Inc1,000$119.0K0.01%00.0%Unchanged
FourThought Financial, LLC1,000$119.0K0.02%00.0%Unchanged
Lazard Asset Management LLC891$106.0K0.00%−32−3.5%Reduced
Harbour Investments, Inc.768$92.0K0.00%−485−38.7%Reduced
O'Shaughnessy Asset Management, LLC769$92.0K0.00%+254+49.3%Added
FinTrust Capital Advisors, LLC755$90.0K0.02%+20+2.7%Added
Healthcare of Ontario Pension Plan Trust Fund709$85.0K0.00%−37,992−98.2%Reduced
Cahill Financial Advisors Inc651$78.0K0.02%+651New
Banque Cantonale Vaudoise642$77.0K0.00%−2,115−76.7%Reduced
Altshuler Shaham Ltd439$53.0K0.00%+439New
IFP Advisors, Inc361$43.0K0.00%−200−35.7%Reduced
Toth Financial Advisory Corp325$39.0K0.01%+100+44.4%Added
Steward Partners Investment Advisory, LLC320$38.0K0.00%−100−23.8%Reduced
Berman Capital Advisors, LLC306$36.0K0.01%+136+80.0%Added