Tandem Diabetes Care's three largest insider shareholders as of June 18, 2026 are Kim D Blickenstaff (Executive Chairman, 165.19K shares), John F Sheridan (President Ceo, 124.69K shares), Susan Morrison (Evp Chief Admin. Officer, 42.63K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Rebecca B Robertson | - | 13,783 | 0 | 23 May, 2025 |
| Kim D Blickenstaff | Executive Chairman | 0 | 165,190 | 22 Nov, 2024 |
| Christopher J Twomey | - | 15,675 | 0 | 23 May, 2025 |
| Douglas A Roeder | - | 0 | 5,658 | 20 Oct, 2021 |
| John F Sheridan | President Ceo | 124,691 | 0 | 19 Feb, 2026 |
| David B Berger | Evp Chief Operating Officer | 6,338 | 0 | 29 Nov, 2023 |
| Rick Carpenter | Chief Technology Officer | 25,274 | 0 | 19 Feb, 2026 |
| Peyton R Howell | - | 21,077 | 0 | 23 May, 2025 |
| Brian B Hansen | Evp Chief Commercial Officer | 12,622 | 0 | 29 Nov, 2023 |
| Dick Allen | - | 19,387 | 0 | 23 May, 2025 |
| Susan Morrison | Evp Chief Admin. Officer | 42,635 | 0 | 19 Feb, 2026 |
| Rajwant Sodhi | - | 15,521 | 0 | 23 May, 2025 |
| Leigh Vosseller | Evp Chief Financial Officer | 39,411 | 0 | 19 Feb, 2026 |
| Jean-Claude Kyrillos | Evp Chief Operating Officer | 25,772 | 0 | 17 Apr, 2026 |
| Kathleen Mcgroddy-Goetz | - | 17,853 | 0 | 23 May, 2025 |
| Elizabeth Anne Gasser | Evp, Chief Strategy Officer | 0 | 25,949 | 08 Dec, 2025 |
| James Leal | Chief Manufacturing Officer | 16,876 | 0 | 28 May, 2024 |
| Shannon Marie Hansen | Evp Chief Legal Officer | 23,276 | 0 | 19 Feb, 2026 |
| Myoungil Cha | - | 13,699 | 0 | 18 Jun, 2025 |
| Joao Paulo Falcao Malagueira | - | 13,699 | 0 | 18 Jun, 2025 |
| Mark David Novara | Evp Chief Commercial Officer | 37,656 | 0 | 18 Mar, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 15 Apr, 2026 | Jean-Claude Kyrillos | Common Stock | A | 3,636 | $0.00 | 27,698 | D | M |
| 15 Apr, 2026 | Jean-Claude Kyrillos | Common Stock | D | 1,926 | $20.66 | 25,772 | D | F |
| 15 Apr, 2026 | Jean-Claude Kyrillos | Restricted Stock Unit | D | 3,636 | $0.00 | 18,181 | D | M |
| 16 Mar, 2026 | Mark David Novara | Common Stock | A | 7,414 | $0.00 | 43,383 | D | M |
| 16 Mar, 2026 | Mark David Novara | Common Stock | D | 5,540 | $21.59 | 37,843 | D | F |
| 17 Mar, 2026 | Mark David Novara | Common Stock | D | 187 | $23.05 | 37,656 | D | S |
| 16 Mar, 2026 | Mark David Novara | Restricted Stock Unit | D | 7,414 | $0.00 | 22,244 | D | M |
| 05 Mar, 2026 | Mark David Novara | Common Stock | D | 2 | $22.81 | 35,969 | D | S |
| 17 Feb, 2026 | Leigh Vosseller | Common Stock | A | 1,503 | $0.00 | 39,151 | D | M |
| 17 Feb, 2026 | Leigh Vosseller | Common Stock | A | 1,503 | $0.00 | 39,151 | D | M |
| 17 Feb, 2026 | Rick Carpenter | Common Stock | A | 1,437 | $0.00 | 25,689 | D | M |
| 17 Feb, 2026 | John F Sheridan | Common Stock | A | 5,471 | $0.00 | 123,071 | D | M |
| 17 Feb, 2026 | Leigh Vosseller | Common Stock | A | 1,503 | $0.00 | 39,151 | D | M |
| 17 Feb, 2026 | Shannon Marie Hansen | Common Stock | A | 531 | $0.00 | 22,005 | D | M |
| 17 Feb, 2026 | Elizabeth Anne Gasser | Common Stock | A | 1,503 | $0.00 | 1,503 | D | M |
| 17 Feb, 2026 | Susan Morrison | Common Stock | A | 1,503 | $0.00 | 42,420 | D | M |
| 17 Feb, 2026 | Mark David Novara | Common Stock | A | 77 | $0.00 | 36,033 | D | M |
| 17 Feb, 2026 | John F Sheridan | Common Stock | D | 1,963 | $18.95 | 121,108 | D | F |
| 17 Feb, 2026 | Susan Morrison | Common Stock | D | 510 | $18.95 | 41,910 | D | F |
| 17 Feb, 2026 | Leigh Vosseller | Common Stock | D | 619 | $18.95 | 38,532 | D | F |