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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
Sep 17, 2021 (view filing)Sep 152 daysBerger David BEVP, Bus Ops & ComplianceSSale−9.00K$122.00−$1.10M−67.9%4.25K after3 lots
Sep 15, 2021 (view filing)Sep 132 daysVosseller LeighEVP & CHIEF FINANCIAL OFFICERSSale−10.0K$120.75−$1.21M−61.9%6.14K after3 lots
Sep 15, 2021 (view filing)Sep 132 daysHansen Brian BEVP & CHIEF COMMERCIAL OFFICERSSale−32.2K$119.00−$3.83M−83.6%6.33K after5 lots
Sep 9, 2021 (view filing)Sep 72 daysLeal JamesSVP, OperationsSSale−3.57K$123.00−$439.6K−48.8%3.75K after
Sep 9, 2021 (view filing)Sep 72 daysTwomey Christopher JDirectorSSale−304$123.00−$37.4K−3.9%7.53K after
Sep 3, 2021 (view filing)Sep 21 dayTwomey Christopher JDirectorSSale−8.70K$115.01−$1.00M−52.6%7.84K after2 lots
Sep 3, 2021 (view filing)Sep 21 dayBlickenstaff Kim DDirectorSSale−28.7K$113.36−$3.25M−12.4%202.4K after2 lots
Aug 31, 2021 (view filing)Aug 274 daysLeal JamesSVP, OperationsSSale−1.67K$110.64−$184.4K−30.8%3.75K after2 lots
Aug 18, 2021 (view filing)Aug 16-172 daysBerger David BEVP, Chief Business/ComplianceSSale−10.0K$109.85−$1.10M−71.2%4.04K after2 lots
Aug 18, 2021 (view filing)Aug 16-172 daysBlickenstaff Kim DDirectorSSale−50.0K$108.96−$5.45M−19.8%202.4K after3 lots
Aug 16, 2021 (view filing)Aug 12-134 daysBlickenstaff Kim DDirectorSSale−64.0K$106.83−$6.84M−20.2%252.4K after2 lots
Aug 12, 2021 (view filing)Aug 102 daysBlickenstaff Kim DDirectorSSale−3.21K$107.21−$344.1K−1.0%316.4K after
Aug 10, 2021 (view filing)Aug 6-94 daysSheridan John FPRESIDENT & CEOSSale−14.9K$108.04−$1.61M−70.7%6.20K after4 lots
Aug 10, 2021 (view filing)Aug 6-94 daysBlickenstaff Kim DDirectorSSale−82.8K$107.70−$8.92M−20.6%319.6K after3 lots
Aug 3, 2021 (view filing)Aug 21 dayRobertson Rebecca BDirectorSSale−1.50K$107.51−$161.3K−79.3%392 after
Aug 3, 2021 (view filing)Jul 304 daysAllen DickDirectorSSale−2.53K$107.00−$270.3K−33.6%5.00K after
Jul 30, 2021 (view filing)Jul 291 dayTwomey Christopher JDirectorSSale−8.00K$105.00−$840.0K−41.0%11.5K after2 lots
Jul 29, 2021 (view filing)Jul 272 daysLeal JamesSVP, OperationsSSale−1.67K$102.25−$170.3K−31.7%3.60K after