Who Owns Tandem Diabetes Care, Inc. (TNDM)?Hedge Fund & Institutional Holders

$21.63+0.76 (+3.62%)HealthcareNASDAQ

Institutional Holders

50

as of Q4 2025

Total Institutional Value

$InfinityT

% of Float Held

Infinity%

QoQ Change in Holders

+8 / -8

Price History

$10.12$18.95$27.78$36.61$45.44Sep 24Jun 25Mar 26

TNDM — Biggest New Institutional Buyers This Quarter

FundActionShares AddedValue Added
Paradice Investment Management LLCNew Position+2.1M+$45.7B
JENNISON ASSOCIATES LLCNew Position+2.0M+$44.4B
CITADEL ADVISORS LLCIncreased+2.0M+$43.5B
DRIEHAUS CAPITAL MANAGEMENT LLCNew Position+1.6M+$35.4B
Assenagon Asset Management S.A.New Position+1.2M+$27.0B
BAILLIE GIFFORD & CONew Position+1.1M+$25.2B
First Light Asset Management, LLCNew Position+1.1M+$23.9B
GOLDMAN SACHS GROUP INCIncreased+252K+$18.6B
JACOBS LEVY EQUITY MANAGEMENT, INCIncreased+172K+$18.0B
BANK OF AMERICA CORP /DE/Increased+44K+$14.0B
TWO SIGMA INVESTMENTS, LPIncreased+84K+$12.4B
ROYCE & ASSOCIATES LPIncreased+140K+$8.1B
CHARLES SCHWAB INVESTMENT MANAGEMENT INCIncreased+88K+$7.2B
PRINCIPAL FINANCIAL GROUP INCNew Position+324K+$7.1B
SECTOR GAMMA ASNew Position+267K+$5.9B

TNDM — Institutions Reducing or Closing Positions

FundActionShares SoldValue Sold
Hood River Capital Management LLCClosed Position-2.6M-$31.0B
UBS Group AGDecreased-1.1M-$9.1B
Connor, Clark & Lunn Investment Management Ltd.Closed Position-615K-$7.5B
Trexquant Investment LPDecreased-395K-$6.0B
Walleye Capital LLCClosed Position-463K-$5.6B
Cubist Systematic Strategies, LLCClosed Position-439K-$5.3B
ROYAL BANK OF CANADADecreased-473K-$5.3B
Kent Lake PR LLCClosed Position-250K-$3.0B
MOORE CAPITAL MANAGEMENT, LPClosed Position-220K-$2.7B
JANE STREET GROUP, LLCDecreased-7K-$2.6B
Divisadero Street Capital Management, LPClosed Position-175K-$2.1B
CAPITAL FUND MANAGEMENT S.A.Decreased-133K-$2.1B
RENAISSANCE TECHNOLOGIES LLCClosed Position-162K-$2.0B
Schonfeld Strategic Advisors LLCDecreased-128K-$1.7B
Russell Investments Group, Ltd.Decreased-9K-$1.7B

Top Institutional Holders(Q4 2025)

#FundSharesValue% of PortfolioType
1ArrowMark Colorado Holdings LLC2,889,691$63.5B1.40%Share
2UBS Group AG2,745,312$60.3B0.01%Call
3Paradice Investment Management LLC2,077,745$45.7B8.89%Share
4JENNISON ASSOCIATES LLC2,021,376$44.4B0.03%Share
5CITADEL ADVISORS LLC2,046,464$44.0B0.01%Share
6JACOBS LEVY EQUITY MANAGEMENT, INC1,653,708$36.0B0.14%Share
7DRIEHAUS CAPITAL MANAGEMENT LLC1,610,342$35.4B0.24%Share
8GOLDMAN SACHS GROUP INC1,496,325$32.0B0.00%Share
9Freestone Grove Partners LP1,442,836$31.0B0.22%Share
10Assenagon Asset Management S.A.1,227,856$27.0B0.04%Share
11TWO SIGMA INVESTMENTS, LP1,201,527$26.0B0.04%Share
12First Light Asset Management, LLC1,089,493$23.9B1.83%Share
13BARCLAYS PLC917,879$20.0B0.00%Share
14TWO SIGMA ADVISERS, LP937,983$20.0B0.04%Share
15D. E. Shaw & Co., Inc.854,266$18.0B0.01%Share
16ROYCE & ASSOCIATES LP650,250$14.3B0.14%Share
17CHARLES SCHWAB INVESTMENT MANAGEMENT INC646,310$14.0B0.00%Share
18BANK OF AMERICA CORP /DE/636,115$13.0B0.00%Share
19Aberdeen Group plc547,035$12.0B0.02%Share
20MILLENNIUM MANAGEMENT LLC583,573$12.0B0.01%Share
21NORTHERN TRUST CORP589,707$12.0B0.00%Share
22BAILLIE GIFFORD & CO470,966$10.4B0.01%Share
23FMR LLC476,900$10.0B0.00%Share
24FRONTIER CAPITAL MANAGEMENT CO LLC412,269$9.1B0.10%Share
25Nuveen, LLC448,508$9.0B0.00%Share
26UBS Group AG335,112$7.4B0.00%Share
27PRINCIPAL FINANCIAL GROUP INC320,225$7.0B0.00%Share
28AQR CAPITAL MANAGEMENT LLC334,078$7.0B0.00%Share
29BAILLIE GIFFORD & CO295,339$6.5B0.01%Share
30JPMORGAN CHASE & CO300,997$6.0B0.00%Share
31SECTOR GAMMA AS267,091$5.9B1.34%Share
32BAILLIE GIFFORD & CO260,270$5.7B0.00%Share
33EDMOND DE ROTHSCHILD HOLDING S.A.258,200$5.0B0.07%Share
34PUBLIC SECTOR PENSION INVESTMENT BOARD234,673$5.0B0.02%Share
35ALLIANCEBERNSTEIN L.P.234,293$5.0B0.00%Share
36BALYASNY ASSET MANAGEMENT L.P.262,788$5.0B0.01%Share
37Invesco Ltd.225,221$5.0B0.00%Share
38RHUMBLINE ADVISERS184,219$4.0B0.00%Share
39GOLDMAN SACHS GROUP INC187,075$4.0B0.00%Share
40VOYA INVESTMENT MANAGEMENT LLC195,344$4.0B0.00%Share
41FMR LLC192,072$4.0B0.00%Share
42ADAGE CAPITAL PARTNERS GP, L.L.C.182,995$4.0B0.01%Share
43CANADA PENSION PLAN INVESTMENT BOARD177,600$3.0B0.00%Share
44PANAGORA ASSET MANAGEMENT INC146,234$3.0B0.01%Share
45MIZUHO MARKETS AMERICAS LLC144,617$3.0B0.06%Share
46BAILLIE GIFFORD & CO118,941$2.6B0.00%Share
47GROUP ONE TRADING LLC118,000$2.6B0.00%Put
48PDT Partners, LLC110,385$2.4B0.16%Share
49BANQUE PICTET & CIE SA97,187$2.1B0.01%Share
50Legal & General Group Plc108,428$2.0B0.00%Share

TNDM Institutional Ownership History

QuarterHoldersTotal ValueChange
Q4 2025266$741.7B+82
Q3 2025184$439.0B-44
Q2 2025228$644.4B-42
Q1 2025270$1.1T-28
Q4 2024298$4.4T+23
Q3 2024275$80.8T+12
Q2 2024263$74.0T+32
Q1 2024231$80.2T—

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As of Q4 2025, 50 institutional investors hold TNDM (Tandem Diabetes Care, Inc.). The largest holder is ArrowMark Colorado Holdings LLC with $63.5B in shares. This quarter, 8 institutions opened new positions and 8 closed their positions.

Frequently Asked Questions

How many hedge funds own TNDM?

As of Q4 2025, 50 institutional investors report holding TNDM (Tandem Diabetes Care, Inc.) in their 13F filings.

Who is the largest institutional holder of TNDM?

The largest institutional holder of TNDM is ArrowMark Colorado Holdings LLC with $63.5B in shares.

Is institutional ownership of TNDM increasing or decreasing?

This quarter, 8 institutions opened new positions in TNDM and 8 closed their positions.