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Tandem Diabetes Care Inc

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

No open-market purchases or sales by Tandem Diabetes Care Inc insiders were filed in the last 90 days; 274 institutions reported holding it in 13F filings for Q2 2026, worth $1.19B in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Tandem Diabetes Care Inc insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
0 filings
Insiders trading
0
Net value
$0
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Tandem Diabetes Care Inc, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Tandem Diabetes Care Inc
NameTitleLast reported holdingLast filingFilings, past year
Vosseller LeighEVP & CHIEF FINANCIAL OFFICER52,040Aug 18, 20265
Sheridan John FPRESIDENT & CEO160,260Aug 18, 20265
Morrison SusanEVP & Chief Admin. Officer52,788Aug 18, 20265
Kyrillos Jean-ClaudeEVP & Chief Operating Officer30,290Aug 18, 20268
Gasser Elizabeth AnneEVP, Chief Strategy Officer1,396Aug 18, 20267
Carpenter RickEVP & Chief Technology Officer32,148Aug 18, 20266
Hansen Shannon MarieEVP & Chief Legal Officer31,650Aug 18, 20265
Robertson Rebecca BDirector22,542May 22, 20261
Twomey Christopher JDirector24,434May 22, 20261
Howell Peyton RDirector29,836May 22, 20261
Allen DickOther: Chair Emeritus28,146May 22, 20261
Sodhi RajwantDirector24,280May 22, 20261
McGroddy-Goetz KathleenDirector26,612May 22, 20261
Cha MyoungilDirector22,458May 22, 20261
Malagueira Joao Paulo FalcaoDirector22,458May 22, 20261
Beaver SandraDirector–May 22, 20262
Novara Mark DavidEVP & CHIEF COMMERCIAL OFFICER40,317May 19, 20266
Blickenstaff Kim DDirector165,190IndirectNov 22, 20240
Leal JamesChief Manufacturing Officer16,876May 28, 20240
Berger David BEVP & Chief Operating Officer6,338Nov 29, 20230
Hansen Brian BEVP & CHIEF COMMERCIAL OFFICER12,622Nov 29, 20230
Roeder Douglas ADirector2,205May 19, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Jun 10, 2022 (view filing)Jun 82 daysBerger David BEVP & Chief Operating OfficerSSale−10.1K$65.02−$656.5K−80.4%2.46K after2 lots
Dec 19, 2022 (view filing)Dec 15-164 daysBerger David BEVP & Chief Operating OfficerSSale−25.0K$40.29−$1.01M−89.2%3.03K after2 lots
Mar 7, 2023 (view filing)Mar 34 daysBerger David BEVP & Chief Operating OfficerSSale−10.0K$41.19−$411.9K−74.8%3.37K after
May 16, 2023 (view filing)May 124 daysVosseller LeighEVP & CHIEF FINANCIAL OFFICERPPurchase+3.02K$32.77+$98.8K+114.0%5.66K after
May 19, 2023 (view filing)May 172 daysHowell Peyton RDirectorPPurchase+3.00K$30.16+$90.5K+54.1%8.55K after
May 22, 2023 (view filing)May 184 daysAllen DickDirectorPPurchase+10.0K$29.47+$294.7K+453.5%12.2K after
Sep 19, 2023 (view filing)Sep 154 daysMcGroddy-Goetz KathleenDirectorPPurchase+1.00K$21.45+$21.4K+12.5%9.03K after
Nov 13, 2023 (view filing)Nov 85 daysHansen Shannon MarieChief Legal OfficerPPurchase+1.94K$15.44+$29.9KNew position1.94K after
Nov 13, 2023 (view filing)Nov 85 daysVosseller LeighEVP & CHIEF FINANCIAL OFFICERPPurchase+6.20K$15.39+$95.4K+109.5%11.9K after
Nov 29, 2023 (view filing)Nov 272 daysAllen DickDirectorPPurchase+5.00K$18.96+$94.8K+33.4%20.0K after
Jun 3, 2024 (view filing)May 304 daysAllen DickDirectorSSale−5.00K$51.68−$258.4K−100.0%0 after
Nov 19, 2024 (view filing)Nov 154 daysNovara Mark DavidEVP & CHIEF COMMERCIAL OFFICERPPurchase+532$23.24+$12.4KNew position532 after
Nov 22, 2024 (view filing)Nov 20-212 daysBlickenstaff Kim DDirectorSSale−40.0K$31.04−$1.24M−19.5%165.2K after2 lots
Mar 11, 2025 (view filing)Mar 74 daysKyrillos Jean-ClaudeEVP & Chief Operating OfficerPPurchase+10.5K$18.12+$190.9KNew position10.5K after
Aug 11, 2025 (view filing)Aug 83 daysVosseller LeighEVP & CHIEF FINANCIAL OFFICERPPurchase+13.7K$10.89+$149.4K+115.7%25.6K after
Aug 11, 2025 (view filing)Aug 11Same daySheridan John FPRESIDENT & CEOPPurchase+10.0K$10.23+$102.3K+10.4%106.3K after
Mar 9, 2026 (view filing)Mar 54 daysNovara Mark DavidEVP & CHIEF COMMERCIAL OFFICERSSale−2$22.81−$45.620.0%36.0K after10b5-1
Mar 18, 2026 (view filing)Mar 171 dayNovara Mark DavidEVP & CHIEF COMMERCIAL OFFICERSSale−187$23.05−$4.31K−0.5%37.7K after