Livermore

TANDEM DIABETES CARE INC

TNDM
Exchange
Nasdaq
Industry
Surgical & Medical Instruments & Apparatus
SEC CIK
0001438133

Insider trades, last 90 days

None

  • No open-market purchases or sales were filed in the last 90 days.
View insider trades

13F holders, Q2 2026

291

  • +10 vs. Q1 2026
  • Total value $1.49B
View 13F holders

Superinvestors holding TNDM

0

  • None of the superinvestors held TNDM at the end of Q2 2026.
See all holders

Price chart

Latest insider trades

View all: Latest insider trades

Open-market purchases and sales by TNDM insiders, newest first.

Insider trades
Filed (ET)Trade dateInsiderTransactionSharesAvg priceValueShares afterHolding changeFiling
Mar 18, 2026Mar 17, 2026Novara Mark DavidEVP & CHIEF COMMERCIAL OFFICERSSaleCommon Stock−187$23.05−$4.31K37.66K−0.5%SEC
Mar 9, 2026Mar 5, 2026Novara Mark DavidEVP & CHIEF COMMERCIAL OFFICERSSaleCommon Stock−2$22.81−$45.6235.97K0.0%SEC10b5-1
Aug 11, 2025Aug 11, 2025Sheridan John FPRESIDENT & CEOPPurchaseCommon Stock+10K$10.23+$102.3K106.33K+10.4%SEC
Aug 11, 2025Aug 8, 2025Vosseller LeighEVP & CHIEF FINANCIAL OFFICERPPurchaseCommon Stock+13.72K$10.89+$149.41K25.58K+115.7%SEC
Mar 11, 2025Mar 7, 2025Kyrillos Jean-ClaudeEVP & Chief Operating OfficerPPurchaseCommon Stock+10.54K$18.12+$190.95K10.54KNew positionSEC

Top 5 13F holders, Q2 2026

View all: Top 5 13F holders, Q2 2026

The largest institutional positions in TNDM at the end of Q2 2026.

Institutions holding TNDM in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
BlackRock, Inc.11,583,125$181.43M0.00%+892,281+8.3%Added
Sessa Capital IM, L.P.5,100,000$76.96M1.33%+369,243+7.8%Added
Linden Advisors LP–$71.19M0.37%––
VANGUARD PORTFOLIO MANAGEMENT LLC4,299,667$64.88M0.00%+306,334+7.7%Added
First Light Asset Management, LLC3,383,553$51.06M3.10%+2,068,838+157.4%Added