Tandem Diabetes Care TNDM Insider Ownership

NASDAQ TNDM
$18.87 -0.24 (-1.26%)
As of: Sep 10, 2026 · 9:54 AM EDT

Insider Holdings by Owner

804.89K Shares

Insider Ownership Statistics

as of 30 Sep, 2018
Insider Ownership
0.449%
-0.041% pp QoQ
Shares Held by Insiders
249.62K
filed for Sep 2018
0.00% QoQ
Shares Outstanding
67.65Mn
67,652,000 shares
Direct Holdings
0
Indirect: 249.62K
Net Shares Traded (QoQ)
0
no net change in Sep 2018
Insiders Holding Shares
21
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest
Average ownership
Peak ownership

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter
Net over range
Buying quarters

Insider Ownership Summary

Quarter ending 30 Sep, 2018

Tandem Diabetes Care's three largest insider shareholders as of September 09, 2026 are Kim D Blickenstaff (Executive Chairman, 165.19K shares), John F Sheridan (President Ceo, 160.26K shares), John F Sheridan (President Ceo, 152.44K shares).

Form 4 Holdings

Insiders Holding TNDM

Insiders 21
Shares held 804.89K
Of outstanding 1.19%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Kim D Blickenstaff Executive Chairman 0 165,190 165,190 20.5% 22 Nov, 2024
2 John F Sheridan President Ceo 160,260 0 160,260 19.9% 18 Aug, 2026
3 Susan Morrison Evp Chief Admin. Officer 52,788 0 52,788 6.6% 18 Aug, 2026
4 Leigh Vosseller Evp Chief Financial Officer 52,040 0 52,040 6.5% 18 Aug, 2026
5 Mark David Novara Evp Chief Commercial Officer 40,317 0 40,317 5.0% 19 May, 2026
6 Rick Carpenter Evp Chief Technology Officer 32,148 0 32,148 4.0% 18 Aug, 2026
7 Shannon Marie Hansen Evp Chief Legal Officer 31,650 0 31,650 3.9% 18 Aug, 2026
8 Jean-Claude Kyrillos Evp Chief Operating Officer 30,290 0 30,290 3.8% 18 Aug, 2026
9 Peyton R Howell Director 29,836 0 29,836 3.7% 22 May, 2026
10 Dick Allen Other 28,146 0 28,146 3.5% 22 May, 2026
11 Kathleen Mcgroddy-Goetz Director 26,612 0 26,612 3.3% 22 May, 2026
12 Christopher J Twomey Director 24,434 0 24,434 3.0% 22 May, 2026
13 Rajwant Sodhi Director 24,280 0 24,280 3.0% 22 May, 2026
14 Rebecca B Robertson Director 22,542 0 22,542 2.8% 22 May, 2026
15 Myoungil Cha Director 22,458 0 22,458 2.8% 22 May, 2026
16 Joao Paulo Falcao Malagueira Director 22,458 0 22,458 2.8% 22 May, 2026
17 James Leal Chief Manufacturing Officer 16,876 0 16,876 2.1% 28 May, 2024
18 Brian B Hansen Evp Chief Commercial Officer 12,622 0 12,622 1.6% 29 Nov, 2023
19 David B Berger Evp Chief Operating Officer 6,338 0 6,338 0.8% 29 Nov, 2023
20 Douglas A Roeder Director 2,205 0 2,205 0.3% 19 May, 2022
21 Elizabeth Anne Gasser Evp, Chief Strategy Officer 1,396 0 1,396 0.2% 18 Aug, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

2,737 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2018
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
15 Aug, 2026 Susan Morrison Evp Chief Admin. Officer Acquired M 1,097 $0.00 $0 51,867 Direct
15 Aug, 2026 Jean-Claude Kyrillos Evp Chief Operating Officer Acquired M 1,010 $0.00 $0 30,825 Direct
15 Aug, 2026 John F Sheridan President Ceo Acquired M 5,982 $0.00 $0 158,425 Direct
15 Aug, 2026 Shannon Marie Hansen Evp Chief Legal Officer Acquired M 1,097 $0.00 $0 31,268 Direct
15 Aug, 2026 Leigh Vosseller Evp Chief Financial Officer Acquired M 1,496 $0.00 $0 50,895 Direct
15 Aug, 2026 Elizabeth Anne Gasser Evp, Chief Strategy Officer Acquired M 1,097 $0.00 $0 1,097 Direct
15 Aug, 2026 Rick Carpenter Evp Chief Technology Officer Acquired M 897 $0.00 $0 31,815 Direct
15 Aug, 2026 Rick Carpenter Evp Chief Technology Officer Disposed F 457 $22.72 $10.38K 31,358 Direct
15 Aug, 2026 Shannon Marie Hansen Evp Chief Legal Officer Disposed F 559 $22.72 $12.70K 30,709 Direct
15 Aug, 2026 Jean-Claude Kyrillos Evp Chief Operating Officer Disposed F 535 $22.72 $12.16K 30,290 Direct
15 Aug, 2026 Susan Morrison Evp Chief Admin. Officer Disposed F 314 $22.72 $7.13K 51,553 Direct
15 Aug, 2026 Elizabeth Anne Gasser Evp, Chief Strategy Officer Disposed F 589 $22.72 $13.38K 508 Direct
15 Aug, 2026 Leigh Vosseller Evp Chief Financial Officer Disposed F 537 $22.72 $12.20K 50,358 Direct
15 Aug, 2026 John F Sheridan President Ceo Disposed F 3,044 $22.72 $69.16K 155,381 Direct
15 Aug, 2026 Shannon Marie Hansen Evp Chief Legal Officer Acquired M 1,917 $0.00 $0 32,626 Direct
15 Aug, 2026 Jean-Claude Kyrillos Evp Chief Operating Officer Disposed M 1,010 $0.00 $0 7,067 Direct
15 Aug, 2026 Rick Carpenter Evp Chief Technology Officer Acquired M 1,610 $0.00 $0 32,968 Direct
15 Aug, 2026 Susan Morrison Evp Chief Admin. Officer Acquired M 1,730 $0.00 $0 53,283 Direct
15 Aug, 2026 John F Sheridan President Ceo Acquired M 9,934 $0.00 $0 165,315 Direct
15 Aug, 2026 Leigh Vosseller Evp Chief Financial Officer Acquired M 2,624 $0.00 $0 52,982 Direct