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TNDM · Tandem Diabetes Care Inc

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$17.08 +0.79 (+4.85%) At close · Jul 17
Market Cap
$1.17B
Shares
68.53M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 276
Total Value: $1,542,640,851
Total Shares: 80,567,219
Showing 1–100 of 286 holdings by value · page 1 of 3

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 275 13F filers
Top Holder
13.3%
Jun 2023 → Mar 2026 · range 11.9% – 15.5%
of institutional value
Top 5
35.8%
Jun 2023 → Mar 2026 · range 33.5% – 44.7%
of institutional value
Top 10
50.9%
Jun 2023 → Mar 2026 · range 48.5% – 59.0%
of institutional value
HHI
420
Jun 2023 → Mar 2026 · range 374 – 520
Broadly held
Showing 100 of 286
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $204,943,470 13.29% 10,690,844
Mega UBS Group AG $99,273,186 6.44% 5,178,570
Mid Sessa Capital IM, L.P. $90,688,611 5.88% 4,730,757
Mid ArrowMark Colorado Holdings LLC $59,496,184 3.86% 3,103,609
Mega VANGUARD CAPITAL MANAGEMENT LLC $58,256,077 3.78% 3,038,919
Large GW&K Investment Management, LLC $51,550,161 3.34% 2,689,106
Mega STATE STREET CORP $51,035,524 3.31% 2,662,260
Large Driehaus Capital Management LLC $44,175,616 2.86% 2,304,414
Mega GOLDMAN SACHS GROUP INC $42,536,734 2.76% 2,218,922
Mega CITADEL ADVISORS LLC $42,033,426 2.72% 2,192,667
Mega UBS Group AG $39,256,344 2.54% 2,047,801
Small Paradice Investment Management LLC $39,153,287 2.54% 2,042,425
Mega TWO SIGMA INVESTMENTS, LP $35,736,598 2.32% 1,864,194
Mega GEODE CAPITAL MANAGEMENT, LLC $32,202,973 2.09% 1,679,863
Mega JENNISON ASSOCIATES LLC $31,792,448 2.06% 1,658,448
Large JACOBS LEVY EQUITY MANAGEMENT, INC $29,214,044 1.89% 1,523,946
Large MARSHALL WACE, LLP $27,652,186 1.79% 1,442,472
Mega MORGAN STANLEY $26,024,077 1.69% 1,357,542
Large Freestone Grove Partners LP $25,510,324 1.65% 1,330,742
Mid First Light Asset Management, LLC $25,203,086 1.63% 1,314,715
Large BAILLIE GIFFORD & CO $20,883,662 1.35% 1,089,393
Mega WELLINGTON MANAGEMENT GROUP LLP $19,989,784 1.30% 1,042,764
Large VOYA INVESTMENT MANAGEMENT LLC $15,415,305 1.00% 804,137
Mega D. E. Shaw & Co., Inc. $15,027,477 0.97% 783,906
Mid Soleus Capital Management, L.P. $15,010,110 0.97% 783,000
Small Defilade Capital Management, L.P. $14,605,718 0.95% 761,905
Mega MILLENNIUM MANAGEMENT LLC $14,601,252 0.95% 761,672
Mega FMR LLC $13,687,589 0.89% 714,011
Mega NORTHERN TRUST CORP Bank $13,545,692 0.88% 706,609
Mid ROYCE & ASSOCIATES LP $13,353,630 0.87% 696,590
Large Quantinno Capital Management LP $12,534,687 0.81% 653,870
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $12,318,603 0.80% 642,598
Large ExodusPoint Capital Management, LP $12,132,673 0.79% 632,899
Large Holocene Advisors, LP $9,150,972 0.59% 477,359
Mega VANGUARD FIDUCIARY TRUST CO Bank $9,041,683 0.59% 471,658
Large Aberdeen Group plc $8,320,297 0.54% 434,027
Mega BARCLAYS PLC $8,075,092 0.52% 421,236
Large Point72 Asset Management, L.P. $8,060,563 0.52% 420,478
Mid FRONTIER CAPITAL MANAGEMENT CO LLC $7,614,496 0.49% 397,209
Mega BANK OF AMERICA CORP /DE/ Bank $7,154,701 0.46% 373,224
Mega Nuveen, LLC $6,974,083 0.45% 363,802
Small DAFNA Capital Management LLC $6,809,337 0.44% 355,208
Mega JPMORGAN CHASE & CO $6,705,511 0.43% 349,792
Mega FIRST TRUST ADVISORS LP $6,569,693 0.43% 342,707
Mega Bank of New York Mellon Corp Bank $6,446,695 0.42% 336,291
Mega AQR CAPITAL MANAGEMENT LLC $6,362,827 0.41% 331,916
Mega PRINCIPAL FINANCIAL GROUP INC $6,355,640 0.41% 331,541
Mega Invesco Ltd. $5,636,974 0.37% 294,052
Large ACADIAN ASSET MANAGEMENT LLC $5,331,483 0.35% 278,116
Small SECTOR GAMMA AS $5,120,134 0.33% 267,091
Mid EDMOND DE ROTHSCHILD HOLDING S.A. $4,949,694 0.32% 258,200
Small BEACONLIGHT CAPITAL, LLC $4,866,822 0.32% 253,877
Large Trexquant Investment LP $4,779,042 0.31% 249,298
Mid Y-Intercept (Hong Kong) Ltd $4,748,113 0.31% 314,653
Mega ENVESTNET ASSET MANAGEMENT INC $4,663,064 0.30% 243,248
Large Public Sector Pension Investment Board Pension $4,650,565 0.30% 242,596
Mega BNP PARIBAS ARBITRAGE, SA $4,001,028 0.26% 208,713
Mid Susquehanna Portfolio Strategies, LLC $3,952,719 0.26% 206,193
Mega ROYAL BANK OF CANADA Bank $3,949,650 0.26% 206,033
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $3,710,468 0.24% 193,556
Mega RHUMBLINE ADVISERS $3,571,677 0.23% 186,316
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $3,230,007 0.21% 168,493
Small Lisanti Capital Growth, LLC $3,169,280 0.21% 165,325
Large PANAGORA ASSET MANAGEMENT INC $3,138,033 0.20% 163,695
Mid MIZUHO MARKETS AMERICAS LLC $3,016,629 0.20% 157,362
Mega Legal & General Group Plc $2,976,870 0.19% 155,288
Large TORONTO DOMINION BANK Bank $2,876,994 0.19% 150,078
Large Russell Investments Group, Ltd. $2,561,030 0.17% 133,596
Mega Swiss National Bank Bank $2,555,361 0.17% 133,300
Mega RAYMOND JAMES FINANCIAL INC $2,402,862 0.16% 125,345
Large BANQUE PICTET & CIE SA $2,375,833 0.15% 123,935
Large FEDERATED HERMES, INC. $2,373,610 0.15% 123,819
Mega AMERIPRISE FINANCIAL INC $2,322,445 0.15% 121,150
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $2,270,475 0.15% 118,439
Mid ALGERT GLOBAL LLC $2,258,206 0.15% 117,799
Mid INTECH INVESTMENT MANAGEMENT LLC $2,135,940 0.14% 111,421
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $2,087,613 0.14% 108,900
Large Verition Fund Management LLC $2,053,471 0.13% 107,119
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,993,680 0.13% 104,000
Large SEI INVESTMENTS CO $1,827,015 0.12% 95,306
Large Zurcher Kantonalbank (Zurich Cantonalbank) Bank $1,808,497 0.12% 94,340
Mid PDT Partners, LLC $1,798,241 0.12% 93,805
Mega BARCLAYS PLC $1,736,802 0.11% 90,600
Large Point72 Asset Management, L.P. $1,725,300 0.11% 90,000
Large Universal- Beteiligungs- und Servicegesellschaft mbH $1,674,633 0.11% 87,357
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $1,615,168 0.10% 84,255
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,547,958 0.10% 80,749
Small Nierenberg Investment Management Company, LLC $1,524,206 0.10% 79,510
Large TUDOR INVESTMENT CORP ET AL $1,514,410 0.10% 78,999
Large Cerity Partners LLC $1,461,290 0.09% 76,228
Mega ALLIANCEBERNSTEIN L.P. $1,402,266 0.09% 73,149
Mid RICE HALL JAMES & ASSOCIATES, LLC $1,397,071 0.09% 72,878
Mega JANE STREET GROUP, LLC $1,359,153 0.09% 70,900
Small FORMULA GROWTH LTD $1,357,772 0.09% 70,828
Large PRUDENTIAL FINANCIAL INC $1,330,474 0.09% 69,404
Mega PRICE T ROWE ASSOCIATES INC /MD/ $1,316,231 0.09% 68,661
Mega CITIGROUP INC $1,310,192 0.08% 68,346
Large NEW YORK STATE TEACHERS RETIREMENT SYSTEM Pension $1,267,060 0.08% 66,096
Mid Cinctive Capital Management LP $1,223,276 0.08% 63,812
Large NATIXIS ADVISORS, LLC $1,170,980 0.08% 61,084
Key facts CIK 1438133 CUSIP 875372203 13F (30d) 24 filings 24 filers Visit website Investor relations

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