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Disclosery

TNDM TANDEM DIABETES CARE INC

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COM NEW (common), issuer CIK 1438133

249 managers (255 13F filers) reported a position in TNDM shares at 2025-09-30, 75,082,306 shares in all. 39 filers opened a position and 57 filers sold out during the quarter.

Managers
249
13F filers
255
New
39
Added
76
Reduced
97
Sold out
57
Shares held by filers
75,082,306

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, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, 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.12,101,471$147M<0.01%+1,229,91313F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC7,063,314$85.7M<0.01%-306,51613F-HRTimelineGroup
Sessa Capital IM, L.P.5,000,000$60.7M1.53%013F-HRTimeline
ArrowMark Colorado Holdings LLC3,691,198$44.8M0.83%+991,64913F-HRTimeline
GW&K Investment Management, LLC2,721,649$33M0.29%-168,48113F-HRTimeline
STATE STREET CORPin group STATE STREET CORP2,668,188$32.4M<0.01%+22,29913F-HRTimelineGroup
Hood River Capital Management LLC2,551,644$31M0.37%-13,33413F-HRTimeline
Paradice Investment Management LLCin group Paradice Investment Managemen…2,196,468$26.7M5.98%+429,28913F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding2,088,085$25.3M-32,725Timeline
Freestone Grove Partners LP1,870,307$22.7M0.17%new13F-HRTimeline
UBS Group AGgroup of 2 filers holding1,689,272$20.5M+36,425Timeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,598,281$19.4M<0.01%-8,05513F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC1,481,953$18M0.07%+50,64613F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC1,431,372$17.4M<0.01%-455,10313F-HRTimelineGroup
JENNISON ASSOCIATES LLC1,420,116$17.2M0.01%-238,82613F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC1,190,127$14.4M0.01%+623,05513F-HR/ATimelineGroup
BAILLIE GIFFORD & COin group BAILLIE GIFFORD & CO1,120,595$13.6M0.01%-5,13313F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC918,723$11.1M0.02%+560,20713F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.877,217$10.6M0.01%+538,54913F-HRTimelineGroup
FMR LLCin group FMR LLC870,123$10.6M<0.01%+345,44813F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY737,547$8.95M<0.01%-527,98713F-HR/ATimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC705,902$8.57M0.01%-263,17113F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP690,883$8.39M<0.01%-9,49813F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA681,078$8.27M<0.01%+131,53613F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/658,353$7.99M<0.01%+112,84913F-HR/ATimelineGroup
Connor, Clark & Lunn Investment Managem…615,221$7.47M0.02%-168,99713F-HRTimeline
Aberdeen Group plcin group Aberdeen Group plc598,096$7.26M0.01%+241,87813F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co558,453$6.78M<0.01%-58,54713F-HRTimelineGroup
ROYCE & ASSOCIATES LP510,000$6.19M0.06%new13F-HRTimeline
Nuveen, LLCin group TIAA502,610$6.1M<0.01%-125,88713F-HRTimelineGroup
Trexquant Investment LP497,720$6.04M0.06%+129,19013F-HRTimeline
Walleye Capital LLCgroup of 2 filers holding470,494$5.71M-102,872Timeline
Cubist Systematic Strategies, LLC439,158$5.33M0.08%new13F-HRTimeline
FRONTIER CAPITAL MANAGEMENT CO LLC415,344$5.04M0.05%+51,24613F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC415,145$4.86M<0.01%+374,14113F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp384,134$4.66M<0.01%-14,86913F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 2 filers holding381,150$4.63M-123,298Timeline
BROWN CAPITAL MANAGEMENT LLC363,352$4.41M0.18%-187,85513F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO359,071$4.36M<0.01%-203,18313F-HR/ATimelineGroup
DAFNA Capital Management LLC355,208$4.31M1.07%+61,00013F-HRTimeline
EDMOND DE ROTHSCHILD HOLDING S.A.in group EDMOND DE ROTHSCHILD HOLDING …333,200$4.05M0.06%+70,60013F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding327,082$3.97M-68,580Timeline
Invesco Ltd.in group Invesco Ltd.302,041$3.67M<0.01%+75,25213F-HRTimelineGroup
SECTOR GAMMA AS269,542$3.27M0.81%+59,01913F-HRTimeline
Public Sector Pension Investment Board263,564$3.2M0.01%+36,46013F-HRTimeline
Kent Lake PR LLC250,000$3.04M1.55%new13F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC236,332$2.87M<0.01%-41,67813F-HRTimelineGroup
ALGERT GLOBAL LLC226,886$2.75M0.05%-304,02813F-HR/ATimeline
ALLIANCEBERNSTEIN L.P.223,720$2.72M<0.01%-46,61913F-HRTimeline
MOORE CAPITAL MANAGEMENT, LP220,479$2.68M0.05%+160,75313F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS219,615$2.67M<0.01%-142,26313F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC217,311$2.64M<0.01%+127,20313F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO215,984$2.62M<0.01%+29,25313F-HRTimelineGroup
Quantinno Capital Management LP200,793$2.44M0.01%-118,86613F-HRTimeline
PANAGORA ASSET MANAGEMENT INC195,225$2.37M0.01%new13F-HRTimeline
KBC Group NVin group KBC Group NV191,837$2.33M0.01%013F-HRTimelineGroup
RHUMBLINE ADVISERS190,184$2.31M<0.01%-3,03513F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc182,432$2.21M<0.01%-2,42113F-HRTimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD177,600$2.16M<0.01%new13F-HRTimeline
Divisadero Street Capital Management, LPin group Divisadero Street Capital Man…174,692$2.12M0.1%013F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC174,146$2.11M<0.01%+36,39713F-HRTimelineGroup
CAPITAL FUND MANAGEMENT S.A.171,109$2.08M0.02%-91,32213F-HRTimeline
PDT Partners, LLC170,420$2.07M0.13%013F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC168,730$2.05M<0.01%-250,30713F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC161,500$1.96M<0.01%-180,82713F-HRTimeline
Schonfeld Strategic Advisors LLC142,855$1.73M0.01%-56,90113F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…137,672$1.67M<0.01%-61,04113F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC136,926$1.66M<0.01%-6,34813F-HRTimelineGroup
Swiss National Bank129,100$1.57M<0.01%+1,80013F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…126,888$1.54M0.02%+32,15413F-HRTimelineGroup
FORMULA GROWTH LTD122,096$1.48M0.53%013F-HRTimeline
Jump Financial, LLCin group Jump Financial, LLC118,444$1.44M0.02%-44,50613F-HR/ATimelineGroup
MIZUHO MARKETS AMERICAS LLCin group MIZUHO FINANCIAL GROUP INC117,362$1.42M0.03%-21,38013F-HRTimelineGroup
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP115,576$1.4M<0.01%-7,95513F-HRTimelineGroup
RICE HALL JAMES & ASSOCIATES, LLC102,569$1.25M0.07%-1,38513F-HRTimeline
Summit Trail Advisors, LLC101,310$1.23M0.02%+76,43013F-HRTimeline
GSA CAPITAL PARTNERS LLP98,941$1.2M0.1%new13F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …98,310$1.19M<0.01%-3,03613F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC92,926$1.08M<0.01%+63,18413F-HRTimelineGroup
HRT FINANCIAL LP88,761$1.08M<0.01%new13F-HRTimeline
GROUP ONE TRADING LLC84,771$1.03M0.03%+28,83113F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC76,299$926K<0.01%-5,96313F-HRTimelineGroup
DARK FOREST CAPITAL MANAGEMENT LP75,535$917K0.03%+14,53313F-HR/ATimeline
BANQUE PICTET & CIE SA74,982$910K0.01%-9,04613F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd73,545$893K0.05%+54,75213F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC73,493$892K0.01%+26,15013F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC69,434$843K<0.01%-313,37013F-HRTimelineGroup
NEW YORK STATE TEACHERS RETIREMENT SYST…68,300$829K<0.01%013F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/65,803$799K<0.01%+6,60013F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD64,681$785K<0.01%-95,93813F-HRTimeline
SG Americas Securities, LLC63,051$765K<0.01%+35,29113F-HRTimeline
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding62,698$761K-37,000Timeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…60,601$736K<0.01%+313F-HRTimeline
Y-Intercept (Hong Kong) Ltd56,925$691K0.02%new13F-HRTimeline
Natixis Investment Managersgroup of 2 filers holding56,404$685K+1,792Timeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\54,766$665K<0.01%+6,39313F-HRTimelineGroup
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co56,332$664K<0.01%013F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN52,174$633K<0.01%+1,89313F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…48,746$592K<0.01%-23113F-HRTimelineGroup
Caprock Group, LLC44,359$555K0.01%13F-HRTimeline
Orion Porfolio Solutions, LLC43,982$534K<0.01%-62913F-HRTimeline
Counterpoint Mutual Funds LLC42,265$513K0.04%new13F-HRTimeline
Bryce Point Capital, LLC42,258$513K0.63%new13F-HRTimeline
OPPENHEIMER ASSET MANAGEMENT INC.in group OPPENHEIMER ASSET MANAGEMENT …41,495$504K0.01%-12,54613F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources40,772$495K<0.01%+13,82213F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP40,730$494K<0.01%new13F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC39,801$483K<0.01%-313,15813F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…39,091$475K<0.01%013F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP39,014$474K<0.01%+3,48513F-HRTimelineGroup
LPL Financial LLC38,874$472K<0.01%+1,41413F-HRTimeline
Inspire Investing, LLCin group Inspire Investing, LLC38,419$466K0.05%+17,57613F-HRTimelineGroup
State of Alaska, Department of Revenue38,153$462K<0.01%-1,50713F-HRTimeline
VIRGINIA RETIREMENT SYSTEMS ET Al37,000$449K<0.01%+10013F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/34,793$422K<0.01%-175,53913F-HRTimelineGroup
Quantbot Technologies LP33,536$407K0.01%+9113F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC32,749$398K<0.01%new13F-HRTimelineGroup
State of Tennessee, Department of Treas…32,298$392K<0.01%-3,89113F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …31,610$384K<0.01%-1,59113F-HRTimelineGroup
Louisiana State Employees Retirement Sy…31,100$378K0.01%013F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson29,811$362K<0.01%013F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC28,823$350K<0.01%-58,30213F-HRTimelineGroup
Quadrature Capital Ltdin group Quadrature Capital Ltd26,756$325K<0.01%new13F-HRTimelineGroup
Versor Investments LP26,200$318K0.06%new13F-HRTimeline
COMERICA BANK25,549$310K<0.01%-4,00513F-HRTimeline
Mariner, LLCin group Mariner, LLC24,803$301K<0.01%+7,06213F-HRTimelineGroup
Advisors Asset Management, Inc.24,312$295K0.01%-68913F-HR/ATimeline
HighMark Wealth Management LLC23,570$286K0.13%-10013F-HRTimeline
Verition Fund Management LLC23,066$280K<0.01%-195,52013F-HRTimeline
AlphaQuest LLC22,910$278K0.02%+5,53913F-HRTimeline
PharVision Advisers, LLC22,268$270K0.15%new13F-HRTimeline
Handelsbanken Fonder AB22,000$267K<0.01%013F-HRTimeline
CWM, LLCin group CWM, LLC21,983$267K<0.01%+19,18713F-HRTimelineGroup
Zurcher Kantonalbank (Zurich Cantonalba…21,449$260K<0.01%013F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC21,327$259K<0.01%-3,81813F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…21,155$257K<0.01%+20113F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND19,948$242K<0.01%-177,82713F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM19,693$239K<0.01%+28513F-HRTimeline
AMALGAMATED BANK19,617$238K<0.01%+65713F-HRTimeline
Bayforest Capital Ltd19,295$234K0.11%+10,02413F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…19,003$231K<0.01%-2,28713F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC18,754$228K0.02%new13F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…18,552$225K<0.01%013F-HRTimeline
Police & Firemen's Retirement System of…18,505$225K<0.01%+3,20613F-HRTimeline
DIVERSIFIED TRUST CO18,339$223K<0.01%+1,99113F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…15,082$219K<0.01%new13F-HRTimeline
MN Wealth Advisors, LLC17,430$212K0.11%new13F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…17,208$209K<0.01%+10713F-HRTimeline
Ensign Peak Advisors, Inc17,182$209K<0.01%-7,80013F-HR/ATimeline
OP Asset Management Ltd17,114$208K<0.01%013F-HR/ATimeline
COMMERCE BANKin group COMMERCE BANK16,757$203K<0.01%-28,34513F-HRTimelineGroup
Olympiad Research LP16,623$202K0.28%new13F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND15,271$185K<0.01%013F-HRTimeline
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC15,101$183K<0.01%-2,13213F-HRTimelineGroup
State of Wyoming15,043$183K0.02%-6,39313F-HRTimeline
Cetera Investment Advisers13,929$169K<0.01%-79413F-HRTimeline
Amundiin group Amundi11,022$165K<0.01%013F-HRTimelineGroup
Atom Investors LP13,521$164K0.01%new13F-HRTimeline
KLP KAPITALFORVALTNING AS13,500$164K<0.01%013F-HRTimeline
ProShare Advisors LLC12,606$153K<0.01%-2,31313F-HRTimeline
PRAXIS INVESTMENT MANAGEMENT INC12,376$150K0.01%new13F-HRTimeline
CAPTRUST FINANCIAL ADVISORS12,251$149K<0.01%-12,51513F-HRTimeline
DEERFIELD MANAGEMENT COMPANY, L.P.in group DEERFIELD MANAGEMENT COMPANY,…12,195$148K<0.01%new13F-HRTimelineGroup
IQ EQ FUND MANAGEMENT (IRELAND) Ltd11,851$144K0.01%013F-HRTimeline
Apollon Wealth Management, LLCin group Apollon Wealth Management, LLC11,257$137K<0.01%-10913F-HRTimelineGroup
Leonteq Securities AG11,042$134K0.01%+5,15113F-HRTimeline
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC10,692$130K<0.01%new13F-HRTimelineGroup
180 WEALTH ADVISORS, LLC10,396$126K0.02%new13F-HRTimeline
Creative Planningin group Creative Planning10,290$125K<0.01%new13F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.8,487$106K<0.01%-79213F-HRTimelineGroup
Advisory Services Network, LLC8,274$100K<0.01%-3,18713F-HRTimeline
China Universal Asset Management Co., L…8,000$97.1K0.01%new13F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…7,650$93K<0.01%013F-HRTimeline
Arax Advisory Partners7,151$86.8K<0.01%+6,67513F-HRTimeline
Ameritas Investment Partners, Inc.group of 2 filers holding5,636$68.4K-1,284Timeline
Aster Capital Management (DIFC) Ltd5,149$62.5K0.03%+4,26913F-HRTimeline
CoreCap Advisors, LLC4,751$57.7K<0.01%+3,46813F-HRTimeline
SHELL ASSET MANAGEMENT CO3,878$47K<0.01%-18,97413F-HRTimeline
Quarry LP3,695$44.9K0.01%+3,55813F-HRTimeline
SIMPLEX TRADING, LLC3,558$43K<0.01%-6,87613F-HRTimeline
Essential Partners LLC2,862$34.7K0.01%new13F-HRTimeline
Farther Finance Advisors, LLC2,635$32K<0.01%-213F-HRTimeline
Stonehage Fleming Financial Services Ho…in group Stonehage Fleming Financial S…2,551$31K<0.01%013F-HRTimelineGroup
CREATIVE FINANCIAL DESIGNS INC /ADV2,522$30.6K<0.01%013F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\2,355$28.6K<0.01%-33,00513F-HRTimelineGroup
Caitong International Asset Management …2,205$26.8K0.02%+1,47013F-HRTimeline
VAN ECK ASSOCIATES CORPin group VAN ECK ASSOCIATES CORP2,049$25K<0.01%-4,49213F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…2,010$24.4K<0.01%-7,15813F-HRTimelineGroup
ASSETMARK, INCin group ASSETMARK, INC1,750$21.2K<0.01%013F-HRTimelineGroup
AdvisorNet Financial, Inc1,680$20.4K<0.01%-3913F-HRTimeline
McIlrath & Eck, LLC1,605$19.5K<0.01%013F-HRTimeline
Point72 Europe (London) LLP1,573$19.1K<0.01%new13F-HRTimeline
Cornerstone Planning Group LLC123$18.7K<0.01%new13F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP1,311$15.7K<0.01%-10013F-HRTimelineGroup
FIRST HORIZON CORP1,194$14.5K<0.01%13F-HRTimeline
QUADRANT CAPITAL GROUP LLC1,132$13.7K<0.01%new13F-HRTimeline
GAMMA Investing LLC1,113$13.5K<0.01%-50813F-HRTimeline
SALEM INVESTMENT COUNSELORS INC1,000$12.1K<0.01%013F-HRTimeline
Point72 Asia (Singapore) Pte. Ltd.1,000$12.1K<0.01%new13F-HRTimeline
NISA INVESTMENT ADVISORS, LLC895$10.9K<0.01%-3,27613F-HRTimeline
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…894$10.9K<0.01%+49113F-HRTimelineGroup