Tandem Diabetes CareTNDM

13F holders, Q1 2025 (March 31)
275holders −40
35new positions
76sold out
6famous investors
$19.16avg. 13F price*

At the end of Q1 2025, 275 institutions reported holding Tandem Diabetes Care Inc. (TNDM) in their 13F filings, down 40 from Q4 2024. 35 opened new positions and 76 sold out. The largest holders were BlackRock, Inc. ($211.3M), Vanguard Group Inc. ($139.7M) and Sessa Capital IM, L.P. ($85.6M). 6 famous investors held it, including Paul Tudor Jones (0.1% of Tudor Investment Corporation's portfolio), Joel Greenblatt (0.0% of Gotham Asset Management's portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).

Company
Tandem Diabetes Care Inc.
CUSIP
875372203
Latest filing quarter
Q2 2026

History

Number of 13F holders

0100200300400 Q1 2024: 291Q1 2024Q2 2024: 316Q2 2024Q3 2024: 331Q3 2024Q4 2024: 315Q4 2024Q1 2025: 275Q1 2025Q2 2025: 270Q2 2025Q3 2025: 255Q3 2025Q4 2025: 269Q4 2025Q1 2026: 274Q1 2026Q2 2026: 274Q2 2026

Total Exit/New Position Q4 2024 → Q1 2025

InstitutionsTotal Value
New Positions35$139.8M
Exits76$187.4M

All 13F filers, Q4 2024 → Q1 2025: 13,479,246 shares bought and 12,335,621 shares sold, net +1,143,625 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.

Ownership 275 holders

BlackRock, Inc. 0.00% Reduce -5.7% 11,028,712 $211.3M
Vanguard Group Inc. 0.00% Reduce -2.0% 7,292,169 $139.7M
Sessa Capital IM, L.P. 3.54% New 4,466,307 $85.6M
GW&K Investment Management, LLC 0.51% Add +34.9% 2,863,987 $54.9M
ArrowMark Colorado Holdings LLC 0.84% Reduce -0.3% 2,716,332 $52.0M
State Street Corp. 0.00% Reduce -2.8% 2,687,739 $51.5M
Hood River Capital Management LLC 0.76% Add +80.9% 2,312,044 $44.3M
Stephens Investment Management Group LLC 0.47% Add +9.7% 1,706,915 $32.7M
Paradice Investment Management LLC 7.06% Add +72.5% 1,649,907 $31.6M
Geode Capital Management, LLC 0.00% Add +1.5% 1,557,210 $29.8M
Jennison Associates LLC 0.02% Add +0.7% 1,477,108 $28.3M
Jacobs Levy Equity Management, Inc. 0.11% Reduce -11.4% 1,471,569 $28.2M
Fred Alger Management, LLC 0.16% Reduce -25.2% 1,454,239 $27.9M
FMR LLC 0.00% Add +32.2% 1,437,076 $27.5M
Champlain Investment Partners, LLC 0.19% Reduce -0.8% 1,368,888 $26.2M
Park West Asset Management LLC 1.76% Reduce -29.8% 1,123,052 $21.5M
Morgan Stanley 0.00% Add +9.9% 930,969 $17.8M
Brown Advisory Inc. 0.03% Add +1.3% 925,310 $17.7M
UBS Group AG 0.00% Add +33.4% 835,692 $16.0M
Balyasny Asset Management L.P. 0.04% New 769,743 $14.7M
Capital World Investors 0.00% No change 767,000 $14.7M
Baillie Gifford & Co. 0.01% Reduce -1.8% 732,574 $14.0M
Goldman Sachs Group Inc. 0.00% Add +5.0% 712,559 $13.7M
Northern Trust Corp. 0.00% Reduce -1.1% 689,534 $13.2M
Two Sigma Advisers, LP 0.03% Reduce -22.9% 679,583 $13.0M
Connor, Clark & Lunn Investment Management Ltd. 0.05% Add +25.2% 644,988 $12.4M
Two Sigma Investments, LP 0.03% Reduce -25.5% 641,442 $12.3M
Brown Capital Management LLC 0.34% Reduce -7.9% 591,014 $11.3M
Charles Schwab Investment Management Inc. 0.00% Reduce -5.3% 570,150 $10.9M
Barclays PLC 0.00% Add +7.8% 514,006 $9.8M
Soleus Capital Management, L.P. 0.75% New 496,039 $9.5M
Kingdon Capital Management, L.L.C. 1.97% Reduce -37.4% 495,229 $9.5M
Bank of America Corp. 0.00% Add +46.9% 466,730 $8.9M
BNP Paribas Financial Markets 0.01% Add +1752.6% 459,798 $8.8M
Bank of New York Mellon Corp 0.00% Reduce -6.7% 407,482 $7.8M
Tudor Investment Corporation 0.07% Add +139.8% 405,292 $7.8M
Principal Financial Group Inc. 0.00% Add +2.9% 399,450 $7.7M
Ameriprise Financial Inc. 0.00% Add +12.2% 387,887 $7.2M
Frontier Capital Management Co. LLC 0.08% Add +34.2% 365,176 $7.0M
Aberdeen Group plc 0.01% Add +43.1% 356,218 $6.8M
Silvercrest Asset Management Group LLC 0.05% Reduce -0.1% 346,095 $6.6M
Envestnet Asset Management Inc. 0.00% Add +25.4% 318,530 $6.1M
Nuveen, LLC 0.00% — 308,315 $5.9M
DAFNA Capital Management LLC 1.62% Add +31.8% 294,208 $5.6M
Renaissance Technologies 0.01% Reduce -9.4% 286,127 $5.5M
Edmond DE Rothschild Holding S.A. 0.09% New 252,600 $4.8M
First Light Asset Management, LLC 0.54% Reduce -16.0% 245,257 $4.7M
Quantinno Capital Management LP 0.03% Add +368.6% 241,831 $4.6M
Invesco Ltd. 0.00% Add +15.7% 237,122 $4.5M
JPMorgan Chase & Co. 0.00% Reduce -40.5% 233,765 $4.5M
Acadian Asset Management LLC 0.01% New 232,872 $4.5M
Millennium Management 0.00% Add +50.4% 227,585 $4.4M
Beaconlight Capital, LLC 2.88% Reduce -33.6% 219,757 $4.2M
Royal Bank of Canada 0.00% Add +30.4% 211,666 $4.1M
Algert Global LLC 0.10% Add +133.8% 209,320 $4.0M
Public Sector Pension Investment Board 0.02% Add +26.9% 208,231 $4.0M
Prudential Financial Inc. 0.01% Reduce -1.6% 172,064 $3.8M
New York State Common Retirement Fund 0.01% Reduce -6.8% 197,775 $3.8M
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% Add +9.1% 193,993 $3.7M
KBC Group NV 0.01% Add +0.7% 193,808 $3.7M
FIL Ltd 0.00% Reduce -4.4% 192,494 $3.7M
Engineers Gate Manager LP 0.06% Reduce -14.3% 190,905 $3.7M
Kennedy Capital Management LLC 0.09% Reduce -30.0% 187,143 $3.6M
Raymond James Financial Inc. 0.00% Add +14.1% 186,628 $3.6M
Susquehanna International Group, LLP 0.01% Add +506.1% 182,251 $3.5M
Alliancebernstein L.P. 0.00% Add +92.6% 180,708 $3.5M
Sector Gamma As 1.11% New 180,523 $3.5M
Rhumbline Advisers 0.00% Reduce -0.2% 178,274 $3.4M
Legal & General Group Plc 0.00% Reduce -3.1% 176,987 $3.4M
Divisadero Street Capital Management, LP 0.38% Reduce -51.5% 174,692 $3.3M
iA Global Asset Management Inc. 0.05% New 165,380 $3.2M
State of Wisconsin Investment Board 0.01% Add +9.7% 156,212 $3.0M
Polar Capital Holdings Plc 0.02% Reduce -1.6% 140,536 $2.7M
Russell Investments Group, Ltd. 0.00% Reduce -52.1% 139,094 $2.7M
Truist Financial Corp. 0.00% Add +15.9% 138,547 $2.7M
Voya Investment Management LLC 0.00% Add +39.2% 136,698 $2.6M
Gsa Capital Partners LLP 0.23% New 130,595 $2.5M
Swiss National Bank 0.00% Reduce -1.1% 127,300 $2.4M
Sei Investments Co. 0.00% Add +0.4% 124,356 $2.4M
Formula Growth Ltd. 0.96% Reduce -1.6% 123,945 $2.4M
Squarepoint Ops LLC 0.01% Add +95.7% 123,883 $2.4M
Mizuho Markets Americas LLC 0.05% Add +36.1% 115,772 $2.2M
Citadel Advisors 0.00% Reduce -13.5% 114,034 $2.2M
Rice Hall James & Associates, LLC 0.12% Reduce -0.5% 104,956 $2.0M
Moore Capital Management, LP 0.08% Add +397.4% 104,451 $2.0M
Citigroup Inc. 0.00% Add +6.3% 101,189 $1.9M
Universal- Beteiligungs- und Servicegesellschaft mbH 0.00% New 87,823 $1.7M
Jupiter Asset Management Ltd. 0.02% New 87,815 $1.7M
Mangrove Partners Im, LLC 0.18% Add +69.1% 82,428 $1.6M
Cerity Partners LLC 0.00% Add +32.2% 76,005 $1.5M
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% Add +2.9% 74,413 $1.4M
Oppenheimer Asset Management Inc. 0.02% Add +17.9% 72,752 $1.4M
Marshall Wace, LLP 0.00% Reduce -92.6% 70,399 $1.3M
Dark Forest Capital Management LP 0.06% New 70,128 $1.3M
Gotham Asset Management 0.01% Reduce -40.8% 68,629 $1.3M
New York State Teachers Retirement System 0.00% No change 68,200 $1.3M
HighTower Advisors, LLC 0.00% Add +604.6% 67,168 $1.3M
Wells Fargo & Company 0.00% Add +9.2% 66,910 $1.3M
Natixis Advisors, LLC 0.00% Reduce -0.2% 65,573 $1.3M
Hussman Strategic Advisors, Inc. 0.29% New 63,000 $1.2M
California State Teachers Retirement System 0.00% No change 61,237 $1.2M
Semanteon Capital Management, LP 0.58% New 55,413 $1.1M
Deutsche Bank AG 0.00% Reduce -12.3% 54,164 $1.0M
CANADA LIFE ASSURANCE Co 0.00% Reduce -14.3% 53,278 $1.0M
LPL Financial LLC 0.00% Add +10.9% 53,272 $1.0M
T. Rowe Price Associates Inc. 0.00% Add +4.1% 52,843 $1.0M
JB Capital LLC 0.05% Add +32.0% 51,778 $992K
Group One Trading LLC 0.04% Add +3138.5% 51,460 $986K
Intech Investment Management LLC 0.01% Add +76.1% 50,479 $967K
Thrivent Financial for Lutherans 0.00% Reduce -5.0% 48,241 $924K
Orion Porfolio Solutions, LLC 0.01% Add +56.6% 47,088 $902K
Orion Portfolio Solutions, LLC 0.01% Add +56.6% 47,088 $902K
US Bancorp \de 0.00% Add +10.3% 42,688 $818K
First Trust Advisors LP 0.00% Reduce -48.8% 39,876 $764K
MetLife Investment Management, LLC 0.00% Reduce -1.5% 39,091 $749K
Capital Fund Management S.A. 0.01% Reduce -80.6% 38,857 $745K
Janney Montgomery Scott LLC 0.00% Add +27.1% 38,450 $737K
Prelude Capital Management, LLC 0.07% Reduce -60.9% 38,159 $731K
State of Alaska, Department of Revenue 0.01% Reduce -2.5% 36,391 $697K
Mirae Asset Global Investments Co., Ltd. 0.00% Reduce -88.0% 36,060 $692K
Landscape Capital Management, L.L.C. 0.06% Add +83.0% 35,942 $689K
Stifel Financial Corp. 0.00% Add +1.5% 35,295 $676K
Corebridge Financial, Inc. 0.00% Reduce -1.9% 34,290 $657K
Manufacturers Life Insurance Company, The 0.00% Reduce -6.4% 32,793 $628K
Teacher Retirement System of Texas 0.00% Add +17.8% 32,465 $622K
Commerce Bank 0.00% Add +18.1% 31,767 $609K
Louisiana State Employees Retirement System 0.01% Reduce -2.8% 30,900 $592K
Versor Investments LP 0.10% New 30,500 $584K
Janus Henderson Group PLC 0.00% No change 29,811 $575K
Verition Fund Management LLC 0.00% New 29,918 $573K
State of Tennessee, Department of Treasury 0.00% No change 29,836 $572K
Comerica Bank 0.00% Add +6.2% 29,692 $569K
VIRGINIA RETIREMENT SYSTEMS ET Al 0.00% — 28,400 $544K
Franklin Resources Inc. 0.00% Add +3.2% 27,671 $530K
Man Group plc 0.00% New 27,321 $523K
Bayforest Capital Ltd 0.22% Add +197.0% 26,288 $504K
Ensign Peak Advisors, Inc 0.00% No change 25,532 $489K
Shell Asset Management Co. 0.02% Reduce -3.8% 25,281 $484K
HighMark Wealth Management LLC 0.28% No change 25,170 $482K
Yousif Capital Management, LLC 0.01% Reduce -1.6% 25,001 $479K
&partners 0.00% Add +221.6% 23,142 $453K
Scientech Research LLC 0.12% New 23,372 $448K
Amundi 0.00% Reduce -64.0% 25,184 $445K
OP Asset Management Ltd 0.01% — 23,000 $441K
Aquatic Capital Management LLC 0.01% Add +6.6% 22,648 $434K
Bessemer Group Inc. 0.00% Reduce -0.1% 22,509 $431K
Advisors Asset Management, Inc. 0.01% Add +8.0% 22,460 $430K
1492 Capital Management LLC 0.23% New 22,446 $430K
Mariner, LLC 0.00% Add +31.2% 22,145 $424K
Handelsbanken Fonder AB 0.00% No change 22,000 $422K
Captrust Financial Advisors 0.00% Add +16.2% 21,517 $412K
Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% Add +19.5% 21,449 $411K
Teachers Retirement System of the State of Kentucky 0.00% No change 21,290 $408K
Chicago Capital, LLC 0.01% Reduce -97.9% 20,726 $397K
PNC Financial Services Group, Inc. 0.00% Reduce -13.5% 19,235 $369K
Maryland State Retirement & Pension System 0.01% Reduce -13.4% 19,137 $367K
Counterpoint Mutual Funds LLC 0.05% New 18,963 $363K
Arizona State Retirement System 0.00% Reduce -0.8% 18,813 $360K
Amalgamated Bank 0.00% Reduce -2.3% 18,776 $360K
Cetera Investment Advisers 0.00% Add +31.8% 18,700 $358K
State Board of Administration of Florida Retirement System 0.00% No change 18,552 $355K
Inspire Investing, LLC 0.04% New 17,893 $343K
Bridgefront Capital, LLC 0.10% New 17,764 $340K
Neuberger Berman Group LLC 0.00% Add +66.7% 17,294 $331K
SG Americas Securities, LLC 0.00% Add +366.4% 16,353 $313K
ExodusPoint Capital Management, LP 0.00% Reduce -93.7% 15,986 $306K
Commonwealth of Pennsylvania Public School Empls Retrmt SYS 0.00% Add +12.1% 15,717 $301K
ProShare Advisors LLC 0.00% Reduce -21.9% 15,464 $296K
Oregon Public Employees Retirement Fund 0.01% Reduce -3.2% 14,971 $287K
Diversified Trust Co. 0.01% No change 14,623 $280K
Cibc World Markets Corp. 0.00% Add +137.1% 14,571 $279K
HSBC Holdings PLC 0.00% Reduce -49.1% 14,144 $270K
Police & Firemen's Retirement System of New Jersey 0.00% No change 13,900 $266K
KLP Kapitalforvaltning As 0.00% No change 13,500 $259K
Victory Capital Management Inc. 0.00% Reduce -97.8% 12,245 $235K
AQR Capital Management 0.00% Reduce -13.2% 12,069 $230K
IQ EQ FUND MANAGEMENT (IRELAND) Ltd 0.03% No change 11,851 $227K
Dynamic Technology Lab Private Ltd 0.03% New 11,766 $225K
Park Avenue Securities LLC 0.00% Add +31.3% 11,708 $224K
Jefferies Financial Group Inc. 0.00% Add +27.4% 11,668 $224K
Atria Investments, Inc 0.00% Add +14.5% 11,569 $222K
Bank of Montreal 0.00% Add +13.8% 11,390 $218K
Corient Private Wealth LP 0.00% Add +43.7% 11,269 $216K
Apollon Wealth Management, LLC 0.00% Reduce -25.2% 11,074 $212K
Wolverine Trading, LLC 0.01% New 10,973 $212K
Brevan Howard Capital Management LP 0.01% Reduce -79.6% 10,779 $207K
Allianz Asset Management GmbH 0.00% New 10,700 $205K
MML Investors Services, LLC 0.00% Add +29.5% 10,718 $205K
MN Wealth Advisors, LLC 0.12% Reduce -40.8% 10,623 $204K
Axq Capital, LP 0.08% New 10,098 $193K
Osaic Holdings, Inc. 0.00% Add +59.4% 9,134 $175K
Quadrant Capital Group LLC 0.01% Add +56.5% 9,078 $174K
AlphaQuest LLC 0.02% Add +819.5% 8,561 $164K
Public Employees Retirement Association of Colorado 0.00% No change 7,650 $147K
Van Eck Associates Corp. 0.00% Add +51.0% 7,398 $142K
Ameritas Investment Partners, Inc. 0.00% No change 6,870 $132K
Leonteq Securities AG 0.01% Add +147.6% 6,848 $131K
Coldstream Capital Management Inc. 0.00% Add +7.5% 6,651 $127K
Canada Pension Plan Investment Board 0.00% Reduce -65.7% 5,800 $111K
State of Wyoming 0.01% Add +49.1% 4,467 $86K
Farther Finance Advisors, LLC 0.00% Add +9.3% 4,116 $77K
Brooklyn Investment Group 0.01% Add +417.8% 3,397 $65K
Tower Research Capital LLC (TRC) 0.00% Reduce -26.2% 2,878 $55K
Lazard Asset Management LLC 0.00% New 2,651 $50K
Stonehage Fleming Financial Services Holdings Ltd 0.00% No change 2,551 $49K
Creative Financial Designs Inc. 0.00% No change 2,522 $48K
GAMMA Investing LLC 0.00% Reduce -54.9% 2,202 $42K
Lanark Financial, Inc. 0.00% — 1,945 $37K
Assetmark, Inc. 0.00% Add +42.9% 1,750 $34K
AdvisorNet Financial, Inc 0.00% Add +11.7% 1,719 $33K
Signaturefd, LLC 0.00% Reduce -25.0% 1,698 $33K
Simplex Trading, LLC 0.00% New 1,503 $28K
Nisa Investment Advisors, LLC 0.00% Add +12.6% 1,454 $28K
CoreCap Advisors, LLC 0.00% No change 1,283 $25K
McIlrath & Eck, LLC 0.00% No change 1,215 $23K
First Horizon Advisors, Inc. 0.00% Add +9.8% 1,071 $21K
Parallel Advisors, LLC 0.00% Reduce -14.4% 1,019 $20K
Smartleaf Asset Management LLC 0.00% Reduce -43.2% 1,008 $19K
Salem Investment Counselors Inc. 0.00% No change 1,000 $19K
Jones Financial Companies LLLP 0.00% Reduce -24.5% 853 $16K
Cwm, LLC 0.00% Reduce -17.4% 771 $15K
Versant Capital Management, Inc 0.00% Add +32.2% 772 $15K
CIBC Private Wealth Group LLC 0.00% Add +254.9% 646 $11K
NewEdge Advisors, LLC 0.00% Add +186.1% 452 $9K
Fifth Third Bancorp 0.00% Add +0.9% 431 $8K
Arax Advisory Partners 0.00% Add +2352.9% 417 $8K
Principal Securities, Inc. 0.00% No change 221 $8K
Mather Group, Llc. 0.00% Add +102.9% 345 $7K
NFSG Corp 0.00% Reduce -42.9% 320 $6K
Covestor Ltd 0.00% Add +0.3% 291 $6K
MassMutual Private Wealth & Trust, FSB 0.00% Add +298.5% 271 $5K
Banque Cantonale Vaudoise 0.00% — 237 $5K
Parkside Financial Bank & Trust 0.00% Add +475.0% 207 $4K
Harbour Investments, Inc. 0.00% No change 204 $4K
Lindbrook Capital, LLC 0.00% Reduce -32.1% 190 $4K
Private Trust Co. NA 0.00% Add +37.0% 185 $4K
Sierra Ocean, LLC 0.00% New 155 $3K
Steward Partners Investment Advisory, LLC 0.00% No change 130 $2K
Front Row Advisors LLC 0.00% No change 100 $2K
Toth Financial Advisory Corp. 0.00% Reduce -69.2% 100 $2K
Continuum Advisory, LLC 0.00% No change 100 $2K
IFP Advisors, Inc 0.00% Add +1.1% 96 $2K
MAI Capital Management 0.00% Reduce -12.4% 78 $1K
CarsonAllaria Wealth Management, Ltd. 0.00% No change 75 $1K
Federation des caisses Desjardins du Quebec 0.00% No change 75 $1K
Sterling Capital Management LLC 0.00% No change 67 $1K
Prestige Wealth Management Group LLC 0.00% Add +125.0% 63 $1K
Bartlett & Co. Wealth Management LLC 0.00% No change 62 $1K
Quent Capital, LLC 0.00% No change 60 $1K
Hantz Financial Services, Inc. 0.00% New 35 $1K
Farmers & Merchants Investments Inc. 0.00% No change 50 $958
Golden State Wealth Management, LLC 0.00% No change 41 $786
EverSource Wealth Advisors, LLC 0.00% Reduce -85.5% 39 $747
Bell Investment Advisors, Inc 0.00% No change 36 $690
Allworth Financial LP 0.00% Reduce -53.7% 38 $672
Sachetta, LLC 0.00% No change 35 $671
Northwestern Mutual Wealth Management Co. 0.00% Reduce -88.8% 35 $671
Huntington National Bank 0.00% Add +13.8% 33 $633
Eastern Bank 0.00% No change 32 $613
Aventura Private Wealth, LLC 0.00% No change 30 $575
Rothschild Investment LLC 0.00% Reduce -57.1% 30 $575
Bare Financial Services, Inc 0.00% New 29 $556
1620 Investment Advisors, Inc. 0.00% New 25 $479
MV Capital Management, Inc. 0.00% Add +2200.0% 23 $441
Stephens Consulting, LLC 0.00% New 20 $384
CENTRAL TRUST Co 0.00% No change 20 $384
Caitong International Asset Management Co., Ltd 0.00% New 19 $364
SBI Securities Co., Ltd. 0.00% Reduce -5.3% 18 $345
JFS Wealth Advisors, LLC 0.00% No change 15 $288
Evermay Wealth Management LLC 0.00% No change 9 $173
Larson Financial Group LLC 0.00% No change 7 $134
Abound Wealth Management 0.00% No change 6 $115
WealthTrak Capital Management LLC 0.00% New 5 $96
Wilmington Savings Fund Society, FSB 0.00% No change 5 $96
True Wealth Design, LLC 0.00% New 1 $20

"% of holder's portfolio" is TNDM's weight in each manager's 13F, not the share of Tandem Diabetes Care Inc. the manager owns.