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Disclosery

TNDM TANDEM DIABETES CARE INC

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COM NEW (common), issuer CIK 1438133

266 managers (269 13F filers) reported a position in TNDM shares at 2025-12-31, 74,868,823 shares in all. 47 filers opened a position and 32 filers sold out during the quarter.

Managers
266
13F filers
269
New
47
Added
85
Reduced
99
Sold out
32
Shares held by filers
74,868,823

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
BlackRock, Inc.in group BlackRock, Inc.11,149,181$245M<0.01%-952,29013F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC7,341,356$161M<0.01%+278,04213F-HRTimelineGroup
Sessa Capital IM, L.P.5,000,000$110M2.18%013F-HRTimeline
ArrowMark Colorado Holdings LLC2,889,691$63.5M1.4%-801,50713F-HRTimeline
GW&K Investment Management, LLC2,675,157$58.8M0.51%-46,49213F-HRTimeline
STATE STREET CORPin group STATE STREET CORP2,641,724$58.1M<0.01%-26,46413F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding2,139,510$47M+51,425Timeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC2,088,603$45.9M0.03%+2,048,80213F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY2,080,497$45.7M<0.01%+1,342,95013F-HR/ATimelineGroup
Paradice Investment Management LLCin group Paradice Investment Managemen…2,077,745$45.7M8.89%-118,72313F-HRTimelineGroup
JENNISON ASSOCIATES LLC2,021,376$44.4M0.03%+601,26013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC1,683,400$37M0.01%+252,02813F-HR/ATimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC1,653,708$36.3M0.14%+171,75513F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,649,383$36.3M<0.01%+51,10213F-HRTimelineGroup
Driehaus Capital Management LLC1,610,342$35.4M0.24%new13F-HRTimeline
Freestone Grove Partners LP1,442,836$31.7M0.23%-427,47113F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS1,248,481$27.4M0.02%+1,028,86613F-HRTimelineGroup
Assenagon Asset Management S.A.1,227,856$27M0.04%new13F-HRTimeline
BAILLIE GIFFORD & COin group BAILLIE GIFFORD & CO1,145,516$25.2M0.02%+24,92113F-HRTimelineGroup
First Light Asset Management, LLC1,089,493$23.9M1.83%new13F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC917,927$20.2M0.01%-272,20013F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP875,531$19.2M0.02%new13F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.854,266$18.8M0.01%-22,95113F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/702,503$15.4M<0.01%+44,15013F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP691,693$15.2M<0.01%+81013F-HRTimelineGroup
FMR LLCin group FMR LLC672,647$14.8M<0.01%-197,47613F-HRTimelineGroup
ROYCE & ASSOCIATES LP650,250$14.3M0.14%+140,25013F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co646,310$14.2M<0.01%+87,85713F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC583,573$12.8M0.01%-122,32913F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding582,735$12.8M-1,106,537Timeline
Nuveen, LLCin group TIAA563,274$12.4M<0.01%+60,66413F-HRTimelineGroup
Aberdeen Group plcin group Aberdeen Group plc547,035$12M0.02%-51,06113F-HRTimelineGroup
FRONTIER CAPITAL MANAGEMENT CO LLC412,269$9.06M0.1%-3,07513F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC392,763$8.62M0.01%-525,96013F-HRTimelineGroup
DAFNA Capital Management LLC355,208$7.81M1.81%013F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp349,753$7.69M<0.01%-34,38113F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO341,631$7.51M<0.01%-17,44013F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC339,579$7.46M<0.01%-75,56613F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding324,262$7.13M-2,820Timeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC319,528$7.02M0.01%+145,38213F-HRTimelineGroup
Quantinno Capital Management LP292,509$6.43M0.01%+91,71613F-HRTimeline
Invesco Ltd.in group Invesco Ltd.277,722$6.1M<0.01%-24,31913F-HRTimelineGroup
SECTOR GAMMA AS267,091$5.87M1.34%-2,45113F-HRTimeline
Lisanti Capital Growth, LLC262,885$5.78M1.37%new13F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management262,788$5.78M0.01%new13F-HRTimelineGroup
EDMOND DE ROTHSCHILD HOLDING S.A.in group EDMOND DE ROTHSCHILD HOLDING …258,200$5.68M0.08%-75,00013F-HRTimelineGroup
Public Sector Pension Investment Board234,673$5.16M0.02%-28,89113F-HRTimeline
ALLIANCEBERNSTEIN L.P.234,293$5.15M<0.01%+10,57313F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC221,654$4.87M<0.01%-14,67813F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC209,975$4.62M0.01%-7,33613F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA208,528$4.58M<0.01%-472,55013F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 2 filers holding196,773$4.33M-184,377Timeline
RHUMBLINE ADVISERS184,219$4.05M<0.01%-5,96513F-HRTimeline
ADAGE CAPITAL PARTNERS GP, L.L.C.in group ADAGE CAPITAL PARTNERS GP, L.…182,995$4.02M0.01%new13F-HRTimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD177,600$3.9M<0.01%013F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc171,861$3.78M<0.01%-10,57113F-HRTimelineGroup
HRT FINANCIAL LP170,480$3.75M0.01%+81,71913F-HRTimeline
PANAGORA ASSET MANAGEMENT INC146,234$3.21M0.01%-48,99113F-HRTimeline
MIZUHO MARKETS AMERICAS LLCin group MIZUHO FINANCIAL GROUP INC144,617$3.18M0.07%+27,25513F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …135,753$2.98M<0.01%new13F-HRTimelineGroup
Swiss National Bank133,300$2.93M<0.01%+4,20013F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC128,720$2.83M<0.01%-40,01013F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…128,660$2.83M<0.01%-9,01213F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC120,169$2.64M<0.01%-16,75713F-HRTimelineGroup
PDT Partners, LLC110,385$2.43M0.16%-60,03513F-HRTimeline
ALGERT GLOBAL LLC108,939$2.39M0.04%-117,94713F-HR/ATimeline
TUDOR INVESTMENT CORP ET AL108,063$2.38M0.01%new13F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO106,598$2.34M<0.01%-109,38613F-HRTimelineGroup
Trexquant Investment LP102,719$2.26M0.02%-395,00113F-HRTimeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…98,309$2.16M<0.01%new13F-HRTimelineGroup
BANQUE PICTET & CIE SA97,187$2.14M0.02%+22,20513F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …89,094$1.96M<0.01%-9,21613F-HRTimelineGroup
Engineers Gate Manager LP88,547$1.95M0.02%new13F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN84,411$1.86M<0.01%+32,23713F-HRTimelineGroup
Y-Intercept (Hong Kong) Ltd83,986$1.85M0.04%+27,06113F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC76,771$1.69M<0.01%+47213F-HRTimelineGroup
Zurcher Kantonalbank (Zurich Cantonalba…74,015$1.63M<0.01%+52,56613F-HRTimeline
Legato Capital Management LLC72,580$1.6M0.14%new13F-HRTimeline
FORMULA GROWTH LTD70,919$1.56M0.6%-51,17713F-HRTimeline
NEW YORK STATE TEACHERS RETIREMENT SYST…68,300$1.5M<0.01%013F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC65,014$1.43M<0.01%-4,42013F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…64,411$1.42M<0.01%+3,81013F-HRTimeline
RICE HALL JAMES & ASSOCIATES, LLC62,415$1.37M0.08%-40,15413F-HRTimeline
SG Americas Securities, LLC61,958$1.36M<0.01%-1,09313F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…61,443$1.35M<0.01%-1,25513F-HRTimelineGroup
GROUP ONE TRADING LLC60,736$1.33M0.04%-24,03513F-HRTimeline
NATIXIS ADVISORS, LLCin group Natixis Investment Managers57,021$1.25M<0.01%+61713F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/56,809$1.25M<0.01%-8,99413F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co56,332$1.24M<0.01%013F-HRTimelineGroup
NORGES BANK54,306$1.19M<0.01%new13F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\54,230$1.19M<0.01%-53613F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…46,589$1.02M<0.01%-2,15713F-HRTimelineGroup
Nierenberg Investment Management Compan…44,555$979K0.49%new13F-HRTimeline
WINTON GROUP Ltdin group WINTON GROUP Ltd44,244$972K0.03%new13F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD43,090$947K<0.01%-21,59113F-HRTimeline
Jump Financial, LLCin group Jump Financial, LLC41,416$910K0.01%-77,02813F-HRTimelineGroup
Orion Porfolio Solutions, LLC40,579$892K0.01%-3,40313F-HRTimeline
LPL Financial LLC39,590$870K<0.01%+71613F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…39,091$859K<0.01%013F-HRTimelineGroup
State of Alaska, Department of Revenue38,676$849K0.01%+52313F-HRTimeline
CAPITAL FUND MANAGEMENT S.A.38,400$844K0.01%-132,70913F-HRTimeline
OPPENHEIMER ASSET MANAGEMENT INC.in group OPPENHEIMER ASSET MANAGEMENT …37,940$834K0.01%-3,55513F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC36,553$810K<0.01%-56,37313F-HR/ATimelineGroup
AlphaQuest LLC35,634$783K0.04%+12,72413F-HRTimeline
Mariner, LLCin group Mariner, LLC35,529$781K<0.01%+10,72613F-HRTimelineGroup
HighMark Wealth Management LLC35,120$772K0.31%+11,55013F-HRTimeline
Summit Trail Advisors, LLC34,529$759K0.01%-66,78113F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…34,091$749K0.01%-92,79713F-HRTimelineGroup
Quantbot Technologies LP32,956$724K0.02%-58013F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC32,760$720K<0.01%+1113F-HRTimelineGroup
State of Wyoming31,798$699K0.08%+16,75513F-HRTimeline
GSA CAPITAL PARTNERS LLP31,184$685K0.06%-67,75713F-HRTimeline
Louisiana State Employees Retirement Sy…31,100$684K0.01%013F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson29,811$655K<0.01%013F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …29,720$653K<0.01%-1,89013F-HRTimelineGroup
Amundiin group Amundi29,445$647K<0.01%+18,42313F-HRTimelineGroup
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP28,171$619K<0.01%-87,40513F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources27,897$613K<0.01%-12,87513F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP27,485$604K<0.01%-11,52913F-HRTimelineGroup
Bayforest Capital Ltd27,409$602K0.45%+8,11413F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC27,371$602K0.01%-46,12213F-HRTimeline
IEQ CAPITAL, LLC27,178$597K<0.01%new13F-HRTimeline
DEERFIELD MANAGEMENT COMPANY, L.P.in group DEERFIELD MANAGEMENT COMPANY,…26,090$573K0.01%+13,89513F-HRTimelineGroup
VIRGINIA RETIREMENT SYSTEMS ET Al24,700$543K<0.01%-12,30013F-HRTimeline
CWM, LLCin group CWM, LLC24,449$537K<0.01%+2,46613F-HRTimelineGroup
Advisors Asset Management, Inc.23,776$523K0.01%-53613F-HR/ATimeline
Counterpoint Mutual Funds LLC22,858$502K0.04%-19,40713F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…22,347$491K<0.01%+1,19213F-HRTimelineGroup
COMERICA BANK21,445$471K<0.01%-4,10413F-HRTimeline
Inspire Investing, LLCin group Inspire Investing, LLC21,066$463K0.04%-17,35313F-HRTimelineGroup
WEALTH ENHANCEMENT ADVISORY SERVICES, L…18,693$440K<0.01%+3,61113F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND19,948$438K<0.01%013F-HRTimeline
AMALGAMATED BANK19,640$432K<0.01%+2313F-HRTimeline
DIVERSIFIED TRUST CO19,558$430K0.01%+1,21913F-HRTimeline
PharVision Advisers, LLC19,554$430K0.22%-2,71413F-HRTimeline
Corient Private Wealth LPin group Corient Private Wealth LP19,535$429K<0.01%new13F-HR/ATimelineGroup
State of Tennessee, Department of Treas…21,514$428K<0.01%-10,78413F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM18,897$415K<0.01%-79613F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…18,552$408K<0.01%013F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/18,522$407K<0.01%-16,27113F-HRTimelineGroup
Police & Firemen's Retirement System of…18,505$407K<0.01%013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC18,368$404K<0.01%-10,45513F-HRTimelineGroup
YOUSIF CAPITAL MANAGEMENT, LLC18,781$385K<0.01%-2,54613F-HRTimeline
OP Asset Management Ltd17,114$376K<0.01%013F-HR/ATimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…16,851$371K<0.01%-2,15213F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…16,786$369K<0.01%-42213F-HRTimeline
COMMERCE BANKin group COMMERCE BANK16,632$366K<0.01%-12513F-HRTimelineGroup
Holocene Advisors, LP16,418$361K<0.01%new13F-HRTimeline
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC15,978$351K<0.01%+87713F-HRTimelineGroup
OREGON PUBLIC EMPLOYEES RETIREMENT FUND15,505$341K<0.01%+23413F-HRTimeline
GREENWOOD CAPITAL ASSOCIATES LLC15,350$337K0.04%new13F-HRTimeline
Caprock Group, LLC14,831$326K0.01%-29,52813F-HRTimeline
Schonfeld Strategic Advisors LLC14,590$321K<0.01%-128,26513F-HRTimeline
KLP KAPITALFORVALTNING AS14,500$319K<0.01%+1,00013F-HRTimeline
MN Wealth Advisors, LLC13,770$303K0.15%-3,66013F-HRTimeline
180 WEALTH ADVISORS, LLC13,443$295K0.03%+3,04713F-HRTimeline
ProShare Advisors LLC13,185$290K<0.01%+57913F-HRTimeline
CAPTRUST FINANCIAL ADVISORS13,111$288K<0.01%+86013F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…13,058$287K0.01%+11,04813F-HRTimelineGroup
Man Group plcin group Man Group plc12,782$281K<0.01%new13F-HRTimelineGroup
FOX RUN MANAGEMENT, L.L.C.11,398$251K0.04%new13F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV11,294$248K<0.01%new13F-HRTimeline
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC11,154$245K<0.01%+46213F-HRTimelineGroup
Lighthouse Investment Partners, LLCin group Lighthouse Investment Partner…11,000$242K0.01%new13F-HRTimelineGroup
Apollon Wealth Management, LLCin group Apollon Wealth Management, LLC10,958$241K<0.01%-29913F-HRTimelineGroup
Cetera Investment Advisers10,937$240K<0.01%-2,99213F-HRTimeline
Verition Fund Management LLC10,587$233K<0.01%-12,47913F-HRTimeline
Prosperitas Financial LLC10,000$220K0.09%new13F-HRTimeline
EP Wealth Advisors, LLC9,977$219K<0.01%13F-HRTimeline
Maryland State Retirement & Pension Sys…9,855$217K<0.01%new13F-HRTimeline
VICTORY CAPITAL MANAGEMENT INC9,771$215K<0.01%new13F-HRTimeline
Focus Partners Wealthin group Focus Partners Wealth9,546$210K<0.01%new13F-HRTimelineGroup
Creative Planningin group Creative Planning9,478$208K<0.01%-81213F-HRTimelineGroup
EntryPoint Capital, LLC9,477$208K0.08%new13F-HRTimeline
Fiduciary Trust Coin group Fiduciary Trust Co9,447$208K<0.01%new13F-HRTimelineGroup
PARK AVENUE SECURITIES LLCin group PARK AVENUE SECURITIES LLC9,403$207K<0.01%new13F-HRTimelineGroup
Walleye Capital LLCgroup of 2 filers holding9,358$206K-461,136Timeline
China Universal Asset Management Co., L…8,000$176K0.01%013F-HRTimeline
Leonteq Securities AG7,806$172K0.01%-3,23613F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…7,650$168K<0.01%013F-HRTimeline
CoreCap Advisors, LLC5,909$130K<0.01%+1,15813F-HRTimeline
Ameritas Investment Partners, Inc.group of 2 filers holding5,586$123K-50Timeline
Ensign Peak Advisors, Inc5,032$111K<0.01%-12,15013F-HR/ATimeline
GAMMA Investing LLC4,542$99.8K0.01%+3,42913F-HRTimeline
Farther Finance Advisors, LLC3,600$79.1K<0.01%+96513F-HRTimeline
CREATIVE FINANCIAL DESIGNS INC /ADV3,431$75.4K<0.01%+90913F-HRTimeline
VAN ECK ASSOCIATES CORPin group VAN ECK ASSOCIATES CORP3,430$75K<0.01%+1,38113F-HRTimelineGroup
Pinnacle Wealth Planning Services, Inc.3,007$66.1K0.01%new13F-HRTimeline
Essential Partners LLC2,887$63.5K0.02%+2513F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.2,616$57.5K<0.01%-5,87113F-HRTimelineGroup
Stonehage Fleming Financial Services Ho…in group Stonehage Fleming Financial S…2,551$56.1K<0.01%013F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\2,019$44.4K<0.01%-33613F-HRTimelineGroup
KBC Group NVin group KBC Group NV2,011$44K<0.01%-189,82613F-HRTimelineGroup
ASSETMARK, INCin group ASSETMARK, INC1,750$38.5K<0.01%013F-HRTimelineGroup
AdvisorNet Financial, Inc1,680$36.9K<0.01%013F-HRTimeline
FIRST HORIZON CORP1,624$35.7K<0.01%+43013F-HRTimeline
McIlrath & Eck, LLC1,605$35.3K<0.01%013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP1,562$34.3K<0.01%+25113F-HRTimelineGroup
Quarry LP1,437$31.6K0.01%-2,25813F-HRTimeline
Smartleaf Asset Management LLC1,330$29.9K<0.01%+59313F-HRTimeline