13F

Stock

Tandem Diabetes Care Inc

TNDM · held by 293 managers

Reported value

$1.88B

Holders

293

+3 new · −2 exited

Holders’ est. mark

$31.7M

Price effect on 9 books still in the name

Largest holder

$249.1M

BlackRock, Inc.

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
BlackRock, Inc.15.1M$249.1MHeld
Vanguard7.34M$161.4MHeld
Sessa Capital IM, L.P.5M$109.9MHeld
Context Capital Management, LLC81.1M$82.7MHeld
Linden Advisors LP78.7M$80.2MHeld
ArrowMark Colorado Holdings LLC2.89M$63.5MHeld
State Street2.64M$58.1MHeld
Citadel2.09M$45.9MHeld
MORGAN STANLEY2.08M$45.7M$7.26MAdded$36.8M
Paradice Investment Management LLC2.08M$45.7MHeld
JENNISON ASSOCIATES LLC2.02M$44.4MHeld
BANK OF MONTREAL /CAN/42.1M$43.3MHeld
GOLDMAN SACHS GROUP INC1.68M$37MHeld
JACOBS LEVY EQUITY MANAGEMENT, INC1.65M$36.3MHeld
GEODE CAPITAL MANAGEMENT, LLC1.65M$36.3MHeld
Driehaus Capital Management LLC1.61M$35.4MHeld
Freestone Grove Partners LP1.44M$31.7MHeld
BNP PARIBAS FINANCIAL MARKETS1.25M$27.4MHeld
Assenagon Asset Management S.A.1.23M$27MHeld
TWO SIGMA INVESTMENTS, LP1.2M$26.4MHeld
BAILLIE GIFFORD & CO1.15M$25.2MHeld
Nuveen, LLC12.1M$24MHeld
First Light Asset Management, LLC1.09M$23.9MHeld
TWO SIGMA ADVISERS, LP938K$20.6MHeld
DeepCurrents Investment Group LLC20M$20.4MHeld
BARCLAYS PLC921.9K$20.2M$11.9MAdded$5.33M
MARSHALL WACE, LLP875.5K$19.2MHeld
D. E. Shaw & Co., Inc.854.3K$18.8MHeld
Fidelity4.48M$18.7MHeld
Jump Financial, LLC16.5M$17.7MHeld
ADVENT CAPITAL MANAGEMENT /DE/16.2M$16.5MHeld
BANK OF AMERICA CORP /DE/702.5K$15.4M$12.2MAdded$6.27M
NORTHERN TRUST CORP691.7K$15.2MHeld
ROYCE & ASSOCIATES LP650.3K$14.3MHeld
CHARLES SCHWAB INVESTMENT MANAGEMENT INC646.3K$14.2MHeld
MILLENNIUM MANAGEMENT LLC583.6K$12.8MHeld
Aberdeen Group plc547K$12MHeld
UBS Group AG417.8K$9.18MHeld
FRONTIER CAPITAL MANAGEMENT CO LLC412.3K$9.06MHeld
Calamos Advisors LLC8.55M$8.75MHeld
JPMORGAN CHASE & CO1.33M$8.51MHeld
SHENKMAN CAPITAL MANAGEMENT INC7.95M$8.31MHeld
DAFNA Capital Management LLC355.2K$7.81MHeld
Bank of New York Mellon Corp349.8K$7.69MHeld
Icahn Capital339.6K$7.46MHeld
PRINCIPAL FINANCIAL GROUP INC324.3K$7.13MHeld
VOYA INVESTMENT MANAGEMENT LLC319.5K$7.02MHeld
Quantinno Capital Management LP292.5K$6.43MHeld
Walleye Capital LLC6M$6.12MHeld
Invesco Ltd.277.7K$6.1MHeld
SECTOR GAMMA AS267.1K$5.87MHeld
Lisanti Capital Growth, LLC262.9K$5.78MHeld
Balyasny Asset Management L.P.262.8K$5.78MHeld
EDMOND DE ROTHSCHILD HOLDING S.A.258.2K$5.68MHeld
PUBLIC SECTOR PENSION INVESTMENT BOARD234.7K$5.16MHeld
ALLIANCEBERNSTEIN L.P.234.3K$5.15MHeld
ENVESTNET ASSET MANAGEMENT INC221.7K$4.87MHeld
JANE STREET GROUP, LLC210K$4.62MHeld
ROYAL BANK OF CANADA208.5K$4.58MHeld
Point72 Asset Management, L.P.4M$4.09MHeld
RHUMBLINE ADVISERS184.2K$4.05MHeld
ADAGE CAPITAL PARTNERS GP, L.L.C.183K$4.02MHeld
CANADA PENSION PLAN INVESTMENT BOARD177.6K$3.9MHeld
Legal & General Group Plc171.9K$3.78MHeld
CAPSTONE INVESTMENT ADVISORS, LLC3.68M$3.75MHeld
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC164.9K$3.62MHeld
CITIGROUP INC2.95M$3.37MHeld
PANAGORA ASSET MANAGEMENT INC146.2K$3.21MHeld
MIZUHO MARKETS AMERICAS LLC144.6K$3.18MHeld
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP135.8K$2.98MHeld
Swiss National Bank133.3K$2.93MHeld
SUSQUEHANNA INTERNATIONAL GROUP, LLP130.3K$2.86MHeld
AMERIPRISE FINANCIAL INC128.7K$2.83MHeld
Russell Investments Group, Ltd.128.7K$2.83MHeld
RAYMOND JAMES FINANCIAL INC120.2K$2.64MHeld
AQR Arbitrage LLC2.5M$2.55MHeld
PDT Partners, LLC110.4K$2.43MHeld
TUDOR INVESTMENT CORP ET AL108.1K$2.38MNew
SEI INVESTMENTS CO106.6K$2.34MHeld
Trexquant Investment LP102.7K$2.26MHeld
WELLINGTON MANAGEMENT GROUP LLP98.3K$2.16MHeld
BANQUE PICTET & CIE SA97.2K$2.14MHeld
ARISTEIA CAPITAL, L.L.C.2M$2.04MHeld
Universal- Beteiligungs- und Servicegesellschaft mbH89.1K$1.96MHeld
Engineers Gate Manager LP88.5K$1.95MHeld
WELLS FARGO & COMPANY/MN84.4K$1.86MHeld
Y-Intercept (Hong Kong) Ltd84K$1.85MHeld
NEW YORK STATE COMMON RETIREMENT FUND1.36M$1.8MHeld
Jefferies Financial Group Inc.1.75M$1.79MHeld
Cerity Partners LLC76.8K$1.69MHeld
Zurcher Kantonalbank (Zurich Cantonalbank)74K$1.63MHeld
Legato Capital Management LLC72.6K$1.6MHeld
FORMULA GROWTH LTD70.9K$1.56MHeld
Susquehanna Portfolio Strategies, LLC66.5K$1.46MHeld
PRUDENTIAL FINANCIAL INC65K$1.43MHeld
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM64.4K$1.42MHeld
RICE HALL JAMES & ASSOCIATES, LLC62.4K$1.37MHeld
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.61.4K$1.35MHeld
GROUP ONE TRADING LLC60.7K$1.33MHeld
NORGES BANK54.3K$1.19MNew
DEUTSCHE BANK AG\54.2K$1.19MHeld
Nierenberg Investment Management Company, LLC44.6K$979.3KHeld
WINTON GROUP Ltd44.2K$972.5KHeld
STATE OF WISCONSIN INVESTMENT BOARD43.1K$947.1KHeld
Orion Porfolio Solutions, LLC40.6K$891.9KHeld
CSS LLC/IL853K$872.8KHeld
LPL Financial LLC39.6K$870.2KHeld
MetLife Investment Management, LLC39.1K$859.2KHeld
CAPITAL FUND MANAGEMENT S.A.38.4K$844KHeld
OPPENHEIMER ASSET MANAGEMENT INC.37.9K$833.9KHeld
HSBC HOLDINGS PLC36.6K$810.3KHeld
AlphaQuest LLC35.6K$783.2KHeld
Mariner, LLC35.5K$781KHeld
HighMark Wealth Management LLC35.1K$771.9KHeld
Summit Trail Advisors, LLC34.5K$758.9KHeld
Brevan Howard Capital Management LP34.1K$749.3KHeld
Quantbot Technologies LP33K$724.4KHeld
AMERICAN CENTURY COMPANIES INC32.8K$720.1KHeld
State of Wyoming31.8K$698.9KHeld
Louisiana State Employees Retirement System31.1K$683.6KHeld
JANUS HENDERSON GROUP PLC29.8K$655.4KHeld
MANUFACTURERS LIFE INSURANCE COMPANY, THE29.7K$653.2KHeld
Amundi29.4K$647.2KHeld
TRUIST FINANCIAL CORP28.2K$619.2KHeld
FRANKLIN RESOURCES INC27.9K$613.2KHeld
STIFEL FINANCIAL CORP27.5K$604.1KHeld
Bayforest Capital Ltd27.4K$602.5KHeld
INTECH INVESTMENT MANAGEMENT LLC27.4K$601.6KHeld
IEQ CAPITAL, LLC27.2K$597.4KHeld
DEERFIELD MANAGEMENT COMPANY, L.P.26.1K$573.5KHeld
VIRGINIA RETIREMENT SYSTEMS ET Al24.7K$542.9KHeld
Advisors Asset Management, Inc.23.8K$522.6KHeld
Counterpoint Mutual Funds LLC22.9K$502.4K$53.5KAdded$139.1K
PALISADE CAPITAL MANAGEMENT, LP485K$497.4KHeld
PNC Financial Services Group, Inc.22.3K$491.2KHeld
COMERICA BANK21.4K$471.4KHeld
Inspire Investing, LLC21.1K$463KHeld
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC18.7K$440KHeld
DIVERSIFIED TRUST CO19.6K$429.9KHeld
PharVision Advisers, LLC19.6K$429.8KHeld
Corient Private Wealth LLC19.5K$429.4KHeld
State of Tennessee, Department of Treasury21.5K$427.9KHeld
ARIZONA STATE RETIREMENT SYSTEM18.9K$415.4KHeld
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM18.6K$407.8KHeld
Police & Firemen's Retirement System of New Jersey18.5K$406.7KHeld
YOUSIF CAPITAL MANAGEMENT, LLC18.8K$384.8KHeld
OP Asset Management Ltd17.1K$376.2K$168.4KAdded$168.4K
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS16.8K$369KHeld
COMMERCE BANK16.6K$365.6KHeld
Holocene Advisors, LP16.4K$360.9KHeld
NEUBERGER BERMAN GROUP LLC16K$351.2KHeld
OREGON PUBLIC EMPLOYEES RETIREMENT FUND15.5K$340.8KHeld
GREENWOOD CAPITAL ASSOCIATES LLC15.3K$337.4KHeld
Caprock Group, LLC14.8K$326KHeld
Schonfeld Strategic Advisors LLC14.6K$320.7KHeld
KLP KAPITALFORVALTNING AS14.5K$318.7KHeld
MN Wealth Advisors, LLC13.8K$302.7KHeld
180 WEALTH ADVISORS, LLC13.4K$295.5KHeld
ProShare Advisors LLC13.2K$289.8KHeld
CAPTRUST FINANCIAL ADVISORS13.1K$288.2KHeld
Tower Research Capital LLC (TRC)13.1K$287KHeld
Man Group plc12.8K$280.9KHeld
FOX RUN MANAGEMENT, L.L.C.11.4K$250.5KHeld
MERCER GLOBAL ADVISORS INC /ADV11.3K$248.2KHeld
GUGGENHEIM CAPITAL LLC11.2K$245.2KHeld
Lighthouse Investment Partners, LLC11K$241.8KHeld
Apollon Wealth Management, LLC11K$240.9KHeld
Cetera Investment Advisers10.9K$240.4KHeld
Verition Fund Management LLC10.6K$232.7KHeld
Prosperitas Financial LLC10K$219.8KHeld
EP Wealth Advisors, LLC9.98K$219.3KHeld
Maryland State Retirement & Pension System9.86K$216.6KHeld
VICTORY CAPITAL MANAGEMENT INC9.77K$214.8KHeld
Focus Partners Wealth9.55K$209.8KHeld
Creative Planning9.48K$208.3KHeld
EntryPoint Capital, LLC9.48K$208.3KHeld
Fiduciary Trust Co9.45K$207.6KHeld
Walleye Trading LLC9.36K$205.7KHeld
China Universal Asset Management Co., Ltd.8K$175.8KHeld
Leonteq Securities AG7.81K$171.6K$76.8KAdded$37.5K
CoreCap Advisors, LLC5.91K$129.9KHeld
Ameritas Investment Partners, Inc.5.59K$122.8KHeld
Ensign Peak Advisors, Inc5.03K$110.6KHeld
Ares Systematic Credit Ltd100K$102.4KHeld
GAMMA Investing LLC4.54K$99.8KHeld
Farther Finance Advisors, LLC3.6K$79.1KHeld
CREATIVE FINANCIAL DESIGNS INC /ADV3.43K$75.4KHeld
Pinnacle Wealth Planning Services, Inc.3.01K$66.1KHeld
Essential Partners LLC2.89K$63.5K$28.2KAdded$28.7K
GW&K Investment Management, LLC2.68M$58.8KHeld
OSAIC HOLDINGS, INC.2.62K$57.5KHeld
Stonehage Fleming Financial Services Holdings Ltd2.55K$56.1KHeld
US BANCORP \DE\2.02K$44.4KHeld
ASSETMARK, INC1.75K$38.5KHeld
AdvisorNet Financial, Inc1.68K$36.9KHeld
FIRST HORIZON CORP1.62K$35.7KHeld
McIlrath & Eck, LLC1.6K$35.3KHeld
JONES FINANCIAL COMPANIES LLLP1.56K$34.3KHeld
Quarry LP1.44K$31.6KHeld
Smartleaf Asset Management LLC1.33K$29.9KHeld
NISA INVESTMENT ADVISORS, LLC1.33K$29.3KHeld
EverSource Wealth Advisors, LLC1.05K$23.1KHeld
FIFTH THIRD BANCORP1.04K$22.8KHeld
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO686$15.1KHeld
Rockefeller Capital Management L.P.627$13.8KHeld
Salomon & Ludwin, LLC595$13.8KHeld
Global Retirement Partners, LLC600$13.2KHeld
QUADRANT CAPITAL GROUP LLC568$12.5KHeld
Allworth Financial LP542$11.9K$2.82KAdded$8.43K
INSIGNEO ADVISORY SERVICES, LLC11K$11.2KHeld
Arax Advisory Partners498$10.9KHeld
Quent Capital, LLC457$10KHeld
Sterling Capital Management LLC444$9.76KHeld
SUMMIT SECURITIES GROUP LLC432$9.49KHeld
Caitong International Asset Management Co., Ltd431$9.47KHeld
ACADIAN ASSET MANAGEMENT LLC392.8K$8.63KHeld
Transamerica Financial Advisors, LLC389$8.55KHeld
Torren Management, LLC379$8.33KHeld
Versant Capital Management, Inc377$8.29KHeld
UMB Bank, n.a.377$8.29KHeld
Ancora Advisors LLC360$7.91KHeld
SIGNATUREFD, LLC347$7.63KHeld
Larson Financial Group LLC292$6.42KHeld
LOS ANGELES CAPITAL MANAGEMENT LLC348$5.08KHeld
HARBOUR INVESTMENTS, INC.204$4.48KHeld
HRT FINANCIAL LP185.6K$4.08KHeld
MAI Capital Management141$3.1KHeld
Colonial Trust Co / SC128$2.88KHeld
ROTHSCHILD INVESTMENT LLC123$2.7KHeld
Newbridge Financial Services Group, Inc.120$2.64KHeld
ALGERT GLOBAL LLC108.9K$2.39KHeld
TOTH FINANCIAL ADVISORY CORP100$2.2KHeld
Front Row Advisors LLC100$2.2KHeld
NewEdge Advisors, LLC100$2.2KHeld
Fortitude Family Office, LLC97$2.13KHeld
Elequin Capital, LP90$1.98KHeld
Golden State Wealth Management, LLC80$1.76KHeld
Federation des caisses Desjardins du Quebec75$1.65KHeld
IFP Advisors, Inc69$1.52K$640Added$728
NEW YORK STATE TEACHERS RETIREMENT SYSTEM68.3K$1.5KHeld
True Wealth Design, LLC67$1.47KHeld
Parallel Advisors, LLC65$1.43KHeld
MassMutual Private Wealth & Trust, FSB64$1.41KHeld
Bare Financial Services, Inc64$1.41KHeld
SG Americas Securities, LLC62K$1.36KHeld
TD PRIVATE CLIENT WEALTH LLC60$1.32KHeld
NATIXIS ADVISORS, LLC57K$1.25KHeld
PRICE T ROWE ASSOCIATES INC /MD/56.8K$1.25KHeld
CANADA LIFE ASSURANCE Co56.3K$1.24KHeld
Parkside Financial Bank & Trust56$1.23KHeld

Who left

Positions as of Q4 2025. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.