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

Jun 30, 2026View all →
InsidersInstitutions
Who's accumulating and trimming this stock (13F).
DateActorActionSecurityValueShares ΔPosition afterImpact
Q1 2026
as of
BNP Paribas Financial Markets
13F manager
Trim—$-19.93M-1.0M
-83.28%
208,713
0.30% of shares
medium
Q2 2024
as of
Barclays PLC
13F manager
Add—$14.34M+356K
+714.73%
405,712
0.58% of shares
medium
Q1 2026
as of
Two Sigma Investments, LP
13F manager
Add—$12.70M+663K
+55.15%
1,864,194
2.68% of shares
medium
Q1 2026
as of
Marshall Wace, LLP
13F manager
Add—$10.87M+567K
+64.75%
1,442,472
2.07% of shares
medium
Q1 2026
as of
Voya Investment Management LLC
13F manager
Add—$9.29M+485K
+151.66%
804,137
1.16% of shares
medium
Q4 2024
as of
Barclays PLC
13F manager
Add—$8.86M+246K
+106.42%
476,974
0.69% of shares
medium
Q3 2025
as of
Barclays PLC
13F manager
Add—$7.56M+623K
+109.87%
1,190,127
1.71% of shares
medium
Q3 2024
as of
Barclays PLC
13F manager
Trim—$-7.41M-175K
-43.05%
231,065
0.33% of shares
medium

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—