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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
Jul 29, 2021 (view filing)Jul 272 daysLeal JamesSVP, OperationsSSale−1.67K$102.25−$170.3K−31.7%3.60K after
Jul 30, 2021 (view filing)Jul 291 dayTwomey Christopher JDirectorSSale−8.00K$105.00−$840.0K−41.0%11.5K after2 lots
Aug 3, 2021 (view filing)Jul 304 daysAllen DickDirectorSSale−2.53K$107.00−$270.3K−33.6%5.00K after
Aug 3, 2021 (view filing)Aug 21 dayRobertson Rebecca BDirectorSSale−1.50K$107.51−$161.3K−79.3%392 after
Aug 10, 2021 (view filing)Aug 6-94 daysBlickenstaff Kim DDirectorSSale−82.8K$107.70−$8.92M−20.6%319.6K after3 lots
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 12, 2021 (view filing)Aug 102 daysBlickenstaff Kim DDirectorSSale−3.21K$107.21−$344.1K−1.0%316.4K after
Aug 16, 2021 (view filing)Aug 12-134 daysBlickenstaff Kim DDirectorSSale−64.0K$106.83−$6.84M−20.2%252.4K 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 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 31, 2021 (view filing)Aug 274 daysLeal JamesSVP, OperationsSSale−1.67K$110.64−$184.4K−30.8%3.75K after2 lots
Sep 3, 2021 (view filing)Sep 21 dayBlickenstaff Kim DDirectorSSale−28.7K$113.36−$3.25M−12.4%202.4K after2 lots
Sep 3, 2021 (view filing)Sep 21 dayTwomey Christopher JDirectorSSale−8.70K$115.01−$1.00M−52.6%7.84K after2 lots
Sep 9, 2021 (view filing)Sep 72 daysTwomey Christopher JDirectorSSale−304$123.00−$37.4K−3.9%7.53K after
Sep 9, 2021 (view filing)Sep 72 daysLeal JamesSVP, OperationsSSale−3.57K$123.00−$439.6K−48.8%3.75K after
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 15, 2021 (view filing)Sep 132 daysVosseller LeighEVP & CHIEF FINANCIAL OFFICERSSale−10.0K$120.75−$1.21M−61.9%6.14K after3 lots
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 17, 2021 (view filing)Sep 15-162 daysVosseller LeighEVP & CHIEF FINANCIAL OFFICERSSale−10.0K$125.00−$1.25M−61.9%6.14K after2 lots
Sep 29, 2021 (view filing)Sep 272 daysLeal JamesSVP, OperationsSSale−1.91K$121.72−$231.9K−33.7%3.75K after3 lots
Oct 4, 2021 (view filing)Oct 13 daysBerger David BEVP, Bus Ops & ComplianceSSale−1.00K$118.00−$118.0K−19.1%4.25K after
Oct 14, 2021 (view filing)Oct 122 daysBerger David BEVP, Bus Ops & ComplianceSSale−10.0K$129.28−$1.29M−70.2%4.25K after
Oct 14, 2021 (view filing)Oct 12-142 daysVosseller LeighEVP & CHIEF FINANCIAL OFFICERSSale−20.0K$132.55−$2.65M−76.5%6.14K after2 lots
Oct 14, 2021 (view filing)Oct 131 dayMorrison SusanEVP & Chief Admin. OfficerSSale−10.0K$132.01−$1.33M−55.4%8.08K after
Oct 28, 2021 (view filing)Oct 271 dayLeal JamesSVP, OperationsSSale−1.90K$130.34−$248.2K−33.7%3.75K after
Nov 3, 2021 (view filing)Nov 12 daysBerger David BEVP, Bus Ops & ComplianceSSale−1.00K$135.70−$135.7K−19.1%4.25K after2 lots
Nov 3, 2021 (view filing)Nov 12 daysRobertson Rebecca BDirectorSSale−1.50K$135.77−$203.7K−100.0%0 after2 lots
Nov 5, 2021 (view filing)Nov 32 daysVosseller LeighEVP & CHIEF FINANCIAL OFFICERSSale−10.0K$140.05−$1.40M−61.9%6.14K after
Nov 5, 2021 (view filing)Nov 32 daysGasser Elizabeth AnneEVP, Chief Strategy OfficerSSale−21.8K$140.02−$3.05M−98.9%243 after
Nov 5, 2021 (view filing)Nov 32 daysMorrison SusanEVP & Chief Admin. OfficerSSale−5.38K$142.00−$763.4K−39.9%8.08K after
Nov 17, 2021 (view filing)Nov 161 dayMorrison SusanEVP & Chief Admin. OfficerSSale−34.6K$142.21−$4.92M−81.1%8.08K after
Dec 1, 2021 (view filing)Dec 1Same dayBerger David BEVP, Bus Ops & ComplianceSSale−1.00K$128.44−$128.4K−18.3%4.45K after2 lots
Dec 1, 2021 (view filing)Nov 292 daysLeal JamesSVP, OperationsSSale−1.91K$130.96−$249.5K−32.2%4.01K after3 lots
Dec 9, 2021 (view filing)Dec 72 daysGasser Elizabeth AnneEVP, Chief Strategy OfficerSSale−1.08K$140.00−$151.6K−71.5%431 after
Dec 17, 2021 (view filing)Dec 152 daysBerger David BEVP, Bus Ops & ComplianceSSale−12.0K$144.25−$1.73M−72.9%4.45K after
Dec 29, 2021 (view filing)Dec 272 daysLeal JamesSVP, OperationsSSale−1.91K$151.45−$288.7K−32.2%4.01K after3 lots
Dec 29, 2021 (view filing)Dec 272 daysGasser Elizabeth AnneEVP, Chief Strategy OfficerSSale−1.08K$151.36−$164.1K−71.6%431 after2 lots
Jan 5, 2022 (view filing)Jan 32 daysBerger David BEVP, Bus Ops & ComplianceSSale−1.00K$149.16−$149.2K−18.3%4.45K after2 lots
Feb 3, 2022 (view filing)Feb 12 daysBerger David BEVP, Bus Ops & ComplianceSSale−1.00K$117.91−$117.9K−18.3%4.45K after3 lots
Feb 3, 2022 (view filing)Feb 12 daysRobertson Rebecca BDirectorSSale−1.50K$117.97−$177.0K−100.0%0 after3 lots
Mar 2, 2022 (view filing)Mar 11 dayBerger David BEVP & Chief Operating OfficerSSale−1.00K$112.68−$112.7K−17.5%4.72K after
Mar 16, 2022 (view filing)Mar 142 daysMcGroddy-Goetz KathleenDirectorSSale−405$106.00−$42.9K−33.2%814 after
Mar 21, 2022 (view filing)Mar 165 daysLateBerger David BEVP & Chief Operating OfficerSSale−5.00K$108.37−$541.9K−51.5%4.72K after
Apr 5, 2022 (view filing)Apr 14 daysBerger David BEVP & Chief Operating OfficerSSale−1.00K$117.88−$117.9K−17.5%4.72K after
May 4, 2022 (view filing)May 22 daysRobertson Rebecca BDirectorSSale−1.50K$96.73−$145.1K−100.0%0 after2 lots
May 10, 2022 (view filing)May 55 daysLateTwomey Christopher JDirectorSSale−248$111.73−$27.7K−3.2%7.57K after2 lots
May 10, 2022 (view filing)May 64 daysHowell Peyton RDirectorPPurchase+2.00K$74.85+$149.7K+211.0%2.95K after6 lots
May 10, 2022 (view filing)May 91 daySheridan John FPRESIDENT & CEOPPurchase+2.50K$69.90+$174.8K+33.1%10.1K after
May 10, 2022 (view filing)May 6-94 daysVosseller LeighEVP & CHIEF FINANCIAL OFFICERPPurchase+2.50K$74.61+$186.5K+37.8%9.12K after3 lots
May 19, 2022 (view filing)May 172 daysBlickenstaff Kim DDirectorSSale−10.8K$92.91−$999.9K−5.0%205.2K after