13F

Stock

Tandem Diabetes Care Inc

TNDM · held by 289 managers

Reported value

$1.76B

Holders

289

+46 new · −50 exited

Holders’ est. mark

−$184.5M

Price effect on 210 books still in the name

Largest holder

$210.2M

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.15.8M$210.2M−$48.7MCut−$38.9M
VOYA INVESTMENT MANAGEMENT LLC118.2M$135.3M−$6.66MAdded$128.3M
Sessa Capital IM, L.P.4.73M$90.7M−$13.3MCut−$19.2M
VANGUARD PORTFOLIO MANAGEMENT LLC3.99M$76.6MHeld
ArrowMark Colorado Holdings LLC3.1M$59.5M−$8.12MCut−$4.02M
VANGUARD CAPITAL MANAGEMENT LLC3.04M$58.3MHeld
Linden Advisors LP54.8M$55.9M$18.7KCut−$24.3M
State Street2.66M$51M−$7.42MCut−$7.03M
Driehaus Capital Management LLC2.3M$44.2M−$4.53MAdded$8.78M
BANK OF MONTREAL /CAN/42.1M$43.6M$272KAdded$291.6K
GOLDMAN SACHS GROUP INC2.22M$42.5M−$4.73MAdded$5.54M
Citadel2.19M$42M−$5.87MCut−$3.87M
Context Capital Management, LLC38.5M$39.3M$68.3KCut−$43.4M
UBS Group AG2.05M$39.3M−$1.17MAdded$30.1M
Paradice Investment Management LLC2.04M$39.2M−$5.74MCut−$6.52M
TWO SIGMA INVESTMENTS, LP1.86M$35.7M−$3.38MAdded$9.33M
GEODE CAPITAL MANAGEMENT, LLC1.68M$32.2M−$4.63MCut−$4.05M
JENNISON ASSOCIATES LLC1.66M$31.8M−$4.66MCut−$12.6M
JACOBS LEVY EQUITY MANAGEMENT, INC1.52M$29.2M−$4.28MCut−$7.13M
MARSHALL WACE, LLP1.44M$27.7M−$2.46MAdded$8.41M
MORGAN STANLEY1.36M$26M−$3.81MCut−$19.7M
Freestone Grove Partners LP1.33M$25.5M−$3.74MCut−$6.2M
First Light Asset Management, LLC1.31M$25.2M−$3.06MAdded$1.26M
BAILLIE GIFFORD & CO1.09M$20.9M−$3.06MCut−$4.29M
WELLINGTON MANAGEMENT GROUP LLP1.04M$20M−$276.2KAdded$17.8M
DeepCurrents Investment Group LLC19.3M$19.7M$4.67KCut−$705.9K
Fidelity4.53M$17.6M−$1.25MCut−$1.09M
Point72 Asset Management, L.P.7.92M$15.7M$3.83MAdded$11.6M
D. E. Shaw & Co., Inc.783.9K$15M−$2.2MCut−$3.75M
Soleus Capital Management, L.P.783K$15MNew
Defilade Capital Management, L.P.761.9K$14.6MNew
MILLENNIUM MANAGEMENT LLC761.7K$14.6M−$1.64MAdded$1.77M
NORTHERN TRUST CORP706.6K$13.5M−$1.94MCut−$1.66M
ROYCE & ASSOCIATES LP696.6K$13.4M−$1.83MCut−$938.9K
Quantinno Capital Management LP653.9K$12.5M−$822KAdded$6.11M
CHARLES SCHWAB INVESTMENT MANAGEMENT INC642.6K$12.3M−$1.81MCut−$1.89M
ExodusPoint Capital Management, LP632.9K$12.1MNew
ARISTEIA CAPITAL, L.L.C.10M$10.2M$3.55KAdded$8.17M
Holocene Advisors, LP477.4K$9.15M−$46.1KAdded$8.79M
VANGUARD FIDUCIARY TRUST CO471.7K$9.04MHeld
Calamos Advisors LLC8.55M$8.73M−$19.1KCut−$19.1K
Aberdeen Group plc434K$8.32M−$1.22MCut−$3.7M
BARCLAYS PLC421.2K$8.08M−$1.15MCut−$12.1M
FRONTIER CAPITAL MANAGEMENT CO LLC397.2K$7.61M−$1.12MCut−$1.45M
BANK OF AMERICA CORP /DE/373.2K$7.15M−$1.05MCut−$8.29M
Nuveen, LLC363.8K$6.97M$6.25MCut−$17.1M
JPMORGAN CHASE & CO349.8K$6.85M$4.6MCut−$1.66M
DAFNA Capital Management LLC355.2K$6.81M−$998.1KCut−$998.1K
FIRST TRUST ADVISORS LP342.7K$6.57MNew
Bank of New York Mellon Corp336.3K$6.45M−$945KCut−$1.24M
Icahn Capital331.9K$6.36M−$932.7KCut−$1.1M
PRINCIPAL FINANCIAL GROUP INC331.5K$6.36M−$911.2KCut−$771.6K
Invesco Ltd.294.1K$5.64M−$780.4KCut−$467.4K
SECTOR GAMMA AS267.1K$5.12M−$750.5KCut−$750.5K
BNP PARIBAS FINANCIAL MARKETS1.23M$5.04M−$22.1MCut−$22.4M
EDMOND DE ROTHSCHILD HOLDING S.A.258.2K$4.95M−$725.5KCut−$725.5K
BEACONLIGHT CAPITAL, LLC253.9K$4.87MNew
Trexquant Investment LP249.3K$4.78M−$288.6KAdded$2.52M
ENVESTNET ASSET MANAGEMENT INC243.2K$4.66M−$622.8KCut−$208.9K
PUBLIC SECTOR PENSION INVESTMENT BOARD242.6K$4.65M−$659.4KCut−$507.5K
Susquehanna Portfolio Strategies, LLC206.2K$3.95M−$186.7KAdded$2.49M
ROYAL BANK OF CANADA206K$3.95M−$578.2KCut−$633K
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP193.6K$3.71M−$381.5KAdded$726.6K
RHUMBLINE ADVISERS186.3K$3.57M−$517.7KCut−$477.5K
Assenagon Asset Management S.A.178.6K$3.42M−$502KCut−$23.6M
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC168.5K$3.23M−$463.4KCut−$394.5K
Lisanti Capital Growth, LLC165.3K$3.17M−$464.6KCut−$2.61M
PANAGORA ASSET MANAGEMENT INC163.7K$3.14M−$410.9KCut−$76.2K
MIZUHO MARKETS AMERICAS LLC157.4K$3.02M−$406.4KCut−$162.1K
Legal & General Group Plc155.3K$2.98M−$436.4KCut−$800.6K
TORONTO DOMINION BANK150.1K$2.88MNew
Russell Investments Group, Ltd.133.6K$2.56M−$361.5KCut−$266.9K
Swiss National Bank133.3K$2.56M−$374.6KCut−$374.6K
RAYMOND JAMES FINANCIAL INC125.3K$2.4M−$337.7KCut−$238.4K
BANQUE PICTET & CIE SA123.9K$2.38M−$273.1KAdded$239.7K
FEDERATED HERMES, INC.123.8K$2.37M−$71Added$2.37M
AMERIPRISE FINANCIAL INC121.2K$2.32M−$340.4KCut−$506.8K
CANADA PENSION PLAN INVESTMENT BOARD118.4K$2.27M−$332.8KCut−$1.63M
INTECH INVESTMENT MANAGEMENT LLC111.4K$2.14M−$76.9KAdded$1.53M
Verition Fund Management LLC107.1K$2.05M−$29.7KAdded$1.82M
SEI INVESTMENTS CO95.3K$1.83M−$267.8KCut−$516K
Zurcher Kantonalbank (Zurich Cantonalbank)94.3K$1.81M−$208KAdded$181.6K
PDT Partners, LLC93.8K$1.8M−$263.6KCut−$628K
Universal- Beteiligungs- und Servicegesellschaft mbH87.4K$1.67M−$245.5KCut−$283.7K
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM84.3K$1.62M−$181KAdded$199.4K
ALLIANCEBERNSTEIN L.P.73.1K$1.61M$0Cut−$3.54M
SUSQUEHANNA INTERNATIONAL GROUP, LLP80.7K$1.55M−$226.9KCut−$1.32M
Nierenberg Investment Management Company, LLC79.5K$1.52M−$125.2KAdded$544.9K
TUDOR INVESTMENT CORP ET AL79K$1.51M−$222KCut−$860.8K
Y-Intercept (Hong Kong) Ltd77.9K$1.49M−$218.8KCut−$353.1K
CITIGROUP INC223.3K$1.47M$1.21MCut−$1.91M
Cerity Partners LLC76.2K$1.46M−$214.2KCut−$226.1K
RICE HALL JAMES & ASSOCIATES, LLC72.9K$1.4M−$175.4KAdded$25.2K
FORMULA GROWTH LTD70.8K$1.36M−$199KCut−$201K
PRUDENTIAL FINANCIAL INC69.4K$1.33M−$182.7KCut−$98.5K
JONES FINANCIAL COMPANIES LLLP58.4K$1.23M−$1.53KAdded$1.19M
Cinctive Capital Management LP63.8K$1.22MNew
XTX Topco Ltd60.8K$1.17MNew
DEUTSCHE BANK AG\60.6K$1.16M−$152.4KCut−$29.7K
VANGUARD ASSET MANAGEMENT, Ltd58.3K$1.12MHeld
Renaissance Technologies58.2K$1.12MNew
Jefferies Financial Group Inc.56.7K$1.09M$1.03MCut−$706.4K
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.55.2K$1.06M−$155.1KCut−$292.6K
Qube Research & Technologies Ltd52K$996.1KNew
TWINBEECH CAPITAL LP51.4K$984.7KNew
Legato Capital Management LLC50.1K$960.1K−$140.7KCut−$635.2K
STATE OF WISCONSIN INVESTMENT BOARD42.6K$816.2K−$119.6KCut−$130.9K
Orion Porfolio Solutions, LLC41.9K$802.6K−$114KCut−$89.3K
OPPENHEIMER ASSET MANAGEMENT INC.40.8K$782K−$106.6KCut−$52K
IEQ CAPITAL, LLC39K$747.8K−$76.4KAdded$150.4K
MetLife Investment Management, LLC38.8K$743.9K−$109.1KCut−$115.3K
Brevan Howard Capital Management LP38.3K$734.9K−$95.8KCut−$14.4K
Summit Trail Advisors, LLC37.7K$723.5K−$97KCut−$35.4K
HighMark Wealth Management LLC34.1K$654.1K−$95.9KCut−$117.9K
AMERICAN CENTURY COMPANIES INC33.5K$641.6K−$92.1KCut−$78.4K
Corient Private Wealth LLC33.7K$636.7K−$60.8KAdded$207.3K
Mariner, LLC33K$632.8K−$92.8KCut−$148.2K
WELLS FARGO & COMPANY/MN31.5K$604.4K−$88.6KCut−$1.25M
TRUIST FINANCIAL CORP30.6K$587K−$79.2KCut−$32.2K
Louisiana State Employees Retirement System30.1K$577K−$84.6KCut−$106.6K
JANUS HENDERSON GROUP PLC29.8K$571.3K−$84.1KCut−$84.1K
LPL Financial LLC29.5K$565.2K−$82.8KCut−$305K
MANUFACTURERS LIFE INSURANCE COMPANY, THE28.7K$550.6K−$80.7KCut−$102.6K
Dynamic Technology Lab Private Ltd27.9K$534.6KNew
Inspire Investing, LLC27K$517.8K−$59.2KAdded$54.8K
Vanguard Global Advisers, LLC27K$516.8KHeld
STIFEL FINANCIAL CORP26.9K$516.5K−$75.7KCut−$87.6K
VARCOV Co.26.6K$509.2KNew
GABELLI FUNDS LLC25K$479.3KNew
CWM, LLC24.8K$474.9K$468.2KAdded$474.3K
Advisors Asset Management, Inc.23.3K$447.4K−$65.6KCut−$75.1K
FIFTH THIRD BANCORP22.6K$433.3K−$2.92KAdded$410.5K
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC22.1K$411.6K−$92.2KCut−$28.4K
DIVERSIFIED TRUST CO21.3K$408.9K−$55KCut−$20.9K
PNC Financial Services Group, Inc.20.8K$399.1K−$58.5KCut−$92.1K
MERCER GLOBAL ADVISORS INC /ADV20.2K$387.5K−$31.7KAdded$139.2K
NEW YORK STATE COMMON RETIREMENT FUND19.9K$382.4K$356KCut−$1.42M
ARIZONA STATE RETIREMENT SYSTEM18.6K$357K−$52.3KCut−$58.4K
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM18.6K$355.6K−$52.1KCut−$52.1K
Police & Firemen's Retirement System of New Jersey18.5K$354.7K−$52KCut−$52K
YOUSIF CAPITAL MANAGEMENT, LLC18.4K$353.7K−$24.4KCut−$31.1K
State of Wyoming18K$344.4K−$50.5KCut−$354.6K
FRANKLIN RESOURCES INC17.9K$342.5K−$50.2KCut−$270.6K
Focus Partners Wealth17.5K$336.5K−$26.6KAdded$126.7K
Allianz Asset Management GmbH16.9K$324KNew
Vanguard Investments Australia, Ltd.16.9K$323.8KHeld
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS16.8K$321.4K−$47.1KCut−$47.5K
COMMERCE BANK16.3K$313.3K−$45.9KCut−$52.3K
NEUBERGER BERMAN GROUP LLC16.1K$308K−$44.9KCut−$43.2K
180 WEALTH ADVISORS, LLC15.8K$302.2K−$37.8KAdded$6.7K
JANE STREET GROUP, LLC292K$298.1K−$4.4MCut−$4.32M
OREGON PUBLIC EMPLOYEES RETIREMENT FUND15.5K$297.2K−$43.6KCut−$43.6K
CAPTRUST FINANCIAL ADVISORS15K$288.3K−$36.8KAdded$164
State of Tennessee, Department of Treasury14.6K$280.8K−$10.5KCut−$147.1K
KLP KAPITALFORVALTNING AS14.5K$278K−$40.7KCut−$40.7K
Caitong International Asset Management Co., Ltd14.2K$273.1K−$1.21KAdded$263.6K
GREENWOOD CAPITAL ASSOCIATES LLC13.9K$267.2K−$39.2KCut−$70.1K
Banco Santander, S.A.13.7K$262.6KNew
EVERGREEN CAPITAL MANAGEMENT LLC13K$249.1KNew
Counterpoint Mutual Funds LLC12.7K$243.1K−$35.6KCut−$259.4K
Cresset Asset Management, LLC12.6K$241.9KNew
Amundi12.6K$241.8K−$35.4KCut−$405.4K
DRW Securities, LLC12.4K$238.1KNew
GUGGENHEIM CAPITAL LLC12.4K$237.5K−$31.3KCut−$7.67K
EP Wealth Advisors, LLC11.9K$227.9K−$28KAdded$8.56K
SYON CAPITAL LLC11.4K$219.2KNew
VICTORY CAPITAL MANAGEMENT INC10.9K$208.6K−$27.5KCut−$6.14K
Pictet Asset Management Holding SA10.8K$206.3KNew
ProShare Advisors LLC10.6K$202.3K−$29.7KCut−$87.5K
Apollon Wealth Management, LLC10.5K$201.9K−$29.6KCut−$38.9K
Prosperitas Financial LLC10K$191.7K−$28.1KCut−$28.1K
Leonteq Securities AG9.5K$182.1K−$21.9KAdded$10.6K
Tower Research Capital LLC (TRC)9.15K$175.3K−$25.7KCut−$111.7K
Advisory Services Network, LLC8.27K$158.6KNew
Bayforest Capital Ltd7.26K$139.3K−$20.4KCut−$463.2K
Ameritas Investment Partners, Inc.5.59K$107.1K−$15.7KCut−$15.7K
NATIXIS5.5K$105.4KNew
Ensign Peak Advisors, Inc5.03K$96.5K−$14.1KCut−$14.1K
China Universal Asset Management Co., Ltd.5K$95.8K−$14KCut−$80K
LAZARD ASSET MANAGEMENT LLC8.46M$86.4KNew
VIRTUS ADVISERS, LLC4.4K$84.3KNew
GAMMA Investing LLC3.5K$67.1K−$9.84KCut−$32.7K
CREATIVE FINANCIAL DESIGNS INC /ADV3.43K$65.8K−$9.64KCut−$9.64K
Versant Capital Management, Inc3.33K$63.9K−$1.06KAdded$55.6K
Pinnacle Wealth Planning Services, Inc.3.07K$58.9K−$8.45KCut−$7.18K
Farther Finance Advisors, LLC3.12K$58.7K−$9.89KCut−$20.4K
SIMPLEX TRADING, LLC2.9K$55.6KNew
Essential Partners LLC2.89K$55.4K−$8.11KCut−$8.09K
NISA INVESTMENT ADVISORS, LLC2.78K$53.3K−$3.75KAdded$24K
GW&K Investment Management, LLC2.69M$51.5K−$7.52KCut−$7.25K
OSAIC HOLDINGS, INC.2.59K$49.6K−$7.27KCut−$7.89K
Stonehage Fleming Financial Services Holdings Ltd2.55K$48.9K−$7.17KCut−$7.17K
Quantbot Technologies LP2.29K$43.8K−$6.42KCut−$680.6K
US BANCORP \DE\2.21K$42.3K−$5.67KCut−$2.03K
OP Asset Management Ltd1.83K$35.2K−$5.16KCut−$341K
Aster Capital Management (DIFC) Ltd1.83K$35.1KNew
GROUP ONE TRADING LLC1.81K$34.8K−$5.1KCut−$1.3M
ASSETMARK, INC1.75K$33.5K−$4.92KCut−$4.92K
AdvisorNet Financial, Inc1.68K$32.2K−$4.72KCut−$4.72K
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO1.63K$31.3K−$1.93KAdded$16.2K
FIRST HORIZON CORP1.62K$31K−$4.55KCut−$4.68K
McIlrath & Eck, LLC1.6K$30.8K−$4.51KCut−$4.51K
BNP PARIBAS ASSET MANAGEMENT Holding S.A.1.35K$25.8K$18.7KAdded$25.8K
EverSource Wealth Advisors, LLC1.32K$25.3K−$2.95KAdded$2.24K
CoreCap Advisors, LLC1.28K$24.6K−$3.61KCut−$105.3K
Ancora Advisors LLC1.23K$23.6K−$1.01KAdded$15.7K
SALEM INVESTMENT COUNSELORS INC1K$19.2KNew
Larson Financial Group LLC804$15.4K−$820Added$8.99K
Salomon & Ludwin, LLC776$14.4K−$2.7KAdded$667
Arax Advisory Partners748$14.3K−$1.4KAdded$3.39K
Allworth Financial LP645$12.4K−$1.52KAdded$451
Kemnay Advisory Services Inc.538$10.3KNew
QUADRANT CAPITAL GROUP LLC480$9.2K−$1.35KCut−$3.28K
SIGNATUREFD, LLC477$9.14K−$975Added$1.52K
Smartleaf Asset Management LLC440$8.62K−$1.29KCut−$21.3K
UMB Bank, n.a.444$8.51K−$1.06KAdded$225
Sterling Capital Management LLC439$8.42K−$1.23KCut−$1.34K
Rockefeller Capital Management L.P.433$8.3K−$1.22KCut−$5.48K
Transamerica Financial Advisors, LLC389$7.46K−$1.09KCut−$1.09K
LOS ANGELES CAPITAL MANAGEMENT LLC348$6.67K$1.59KAdded$1.59K
SJS Investment Consulting Inc.321$6.15K−$31Added$5.91K
Quent Capital, LLC309$5.92K−$868Cut−$4.12K
ACADIAN ASSET MANAGEMENT LLC278.1K$5.32K−$786Cut−$3.3K
Parallel Advisors, LLC265$5.08K−$183Added$3.65K
BEACON INVESTMENT ADVISORY SERVICES, INC.240$4.6KNew
True Wealth Design, LLC207$3.97K−$188Added$2.5K
HARBOUR INVESTMENTS, INC.204$3.91K−$573Cut−$573
TWIN PEAKS WEALTH ADVISORS, LLC142$2.72KNew
Western Wealth Management, LLC140$2.68KNew
HRT FINANCIAL LP135.1K$2.59K−$380Cut−$1.49K
ROTHSCHILD INVESTMENT LLC133$2.55K−$346Cut−$154
Colonial Trust Co / SC122$2.39K−$357Cut−$492
Newbridge Financial Services Group, Inc.120$2.3K−$338Cut−$338
ALGERT GLOBAL LLC117.8K$2.26K−$306Cut−$136
MAI Capital Management113$2.17K−$317Cut−$933
TOTH FINANCIAL ADVISORY CORP100$1.92K−$281Cut−$281
Front Row Advisors LLC100$1.92K−$281Cut−$281
Fortitude Family Office, LLC97$1.86K−$273Cut−$273
Keating Financial Advisory Services, Inc.77$1.48KNew
IFP Advisors, Inc69$1.32K−$194Cut−$194
PRICE T ROWE ASSOCIATES INC /MD/68.7K$1.32K−$159Added$68
NEW YORK STATE TEACHERS RETIREMENT SYSTEM66.1K$1.27K−$186Cut−$234
NATIXIS ADVISORS, LLC61.1K$1.17K−$160Cut−$82
JPL Wealth Management, LLC61$1.17KNew
TD PRIVATE CLIENT WEALTH LLC60$1.15K−$169Cut−$169
Parkside Financial Bank & Trust56$1.07K−$158Cut−$158
CANADA LIFE ASSURANCE Co53.3K$1.02K−$150Cut−$217
FARMERS & MERCHANTS INVESTMENTS INC50$959−$140Cut−$140
Thrivent Financial for Lutherans45.3K$868−$127Cut−$156
Bare Financial Services, Inc42$805−$118Cut−$602

Who left

Positions as of Q1 2026. 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.