Companies / Tandem Diabetes Care Inc

Tandem Diabetes Care Inc

Nasdaq: TNDMCIK 1438133San Diego, CAtandemdiabetes.com ↗

Financials · FY2025

Revenue$1.01B
Net income$-204.71M
Total debt$602.58M
Cash$62.82M
Diluted EPS$-3.04
Shares outstanding69.6M

Ownership

69.6M shares outstanding · as of Aug 3, 2026
0.56%Insiders
Ownership
Insiders0.56%392,799
10%+ / strategic4.15%2,889,691
Institutions106.24%73,923,908
Public float0.00%0

Reported holdings exceed shares outstanding — public float shown as 0; some positions may overlap or lag.

% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.

Insiders 10

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Insider% of sharesShares
Sheridan John FCEOPRESIDENT & CEO · Director
0.22%152,443
Morrison SusanEVP & Chief Admin. Officer
0.06%42,635
Vosseller LeighEVP & CHIEF FINANCIAL OFFICER
0.06%39,411
Novara Mark DavidEVP & CHIEF COMMERCIAL OFFICER
0.05%37,656
Carpenter RickChief Technology Officer
0.04%25,274
Twomey Christopher JDirector
0.04%24,434
Kyrillos Jean-ClaudeEVP & Chief Operating Officer
0.03%24,062
Hansen Shannon MarieEVP & Chief Legal Officer
0.03%23,276
Robertson Rebecca BDirector
0.03%22,542
Gasser Elizabeth AnneEVP, Chief Strategy Officer
<0.01%1,066

Institutional holders 274

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HolderValue% of shares
BlackRock, Inc.$174.79M16.65%
Vanguard Group Inc$161.36M10.55%
Sessa Capital IM, L.P.$109.90M7.19%
ArrowMark Colorado Holdings, LLC$63.52M4.15%
Citadel Advisors LLC$45.91M3.00%
Morgan Stanley$45.73M2.99%
Paradice Investment Management LLC$45.67M2.99%
Jennison Associates LLC$44.43M2.91%
State Street Corporation$43.03M4.10%
The Goldman Sachs Group, Inc.$37.00M2.42%

Activity

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InsidersInstitutions
What insiders are doing in this stock (Form 4).
DateActorActionSecurityValueShares ΔPosition afterImpact
May 15, 2026Sheridan John F
CEO
OtherCommon Stock$242.9K-19K
-11.14%
151,107
0.22% of shares
low
Mar 16, 2026Novara Mark David
Executive
OtherCommon Stock$119.6K-6K
-12.77%
37,843
0.05% of shares
low
Feb 17, 2026Sheridan John F
CEO
OtherCommon Stock$45.5K-2K
-1.89%
124,691
0.18% of shares
low
Jan 15, 2026Kyrillos Jean-Claude
Executive
OtherCommon Stock$44.6K-2K
-8.09%
24,062
0.03% of shares
low
May 15, 2026Sheridan John F
CEO
OtherCommon Stock$39.0K-3K
-2.28%
130,316
0.19% of shares
low
Feb 17, 2026Sheridan John F
CEO
OtherCommon Stock$37.2K-2K
-1.59%
121,108
0.17% of shares
low
May 15, 2026Sheridan John F
CEO
OtherCommon Stock$35.7K-3K
-2.14%
127,378
0.18% of shares
low
Feb 17, 2026Gasser Elizabeth Anne
Executive
OtherCommon Stock$16.8K-887
-59.02%
616
<0.01% of shares
low

5%+ ownership events

Schedule 13D / 13G
FilerStance% of classSharesDate
Vanguard Group IncPassive13G/A—0—
ArrowMark Colorado Holdings, LLCPassive13G/A—2,889,691—

Securities

via CUSIP / OpenFIGI
SymbolTypeMarketCUSIPFIGI
TNDM——875372203—