Tandem Diabetes Care's three largest insider shareholders as of April 22, 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 |
|---|---|---|---|---|
| Kim D Blickenstaff | Executive Chairman | 0 | 165,190 | 22 Nov, 2024 |
| John F Sheridan | President Ceo | 124,691 | 0 | 19 Feb, 2026 |
| Susan Morrison | Evp Chief Admin. Officer | 42,635 | 0 | 19 Feb, 2026 |
| Leigh Vosseller | Evp Chief Financial Officer | 39,411 | 0 | 19 Feb, 2026 |
| Mark David Novara | Evp Chief Commercial Officer | 37,656 | 0 | 18 Mar, 2026 |
| Elizabeth Anne Gasser | Evp, Chief Strategy Officer | 0 | 25,949 | 08 Dec, 2025 |
| Leigh Vosseller | Evp Chief Financial Officer | 0 | 25,580 | 11 Aug, 2025 |
| Rick Carpenter | Chief Technology Officer | 25,274 | 0 | 19 Feb, 2026 |
| Jean-Claude Kyrillos | Evp Chief Operating Officer | 24,062 | 0 | 20 Jan, 2026 |
| Shannon Marie Hansen | Evp Chief Legal Officer | 23,276 | 0 | 19 Feb, 2026 |
| Peyton R Howell | - | 21,077 | 0 | 23 May, 2025 |
| Dick Allen | - | 19,387 | 0 | 23 May, 2025 |
| Kathleen Mcgroddy-Goetz | - | 17,853 | 0 | 23 May, 2025 |
| Kim D Blickenstaff | President Ceo | 17,848 | 0 | 24 May, 2024 |
| James Leal | Chief Manufacturing Officer | 16,876 | 0 | 28 May, 2024 |
| Christopher J Twomey | - | 15,675 | 0 | 23 May, 2025 |
| Rajwant Sodhi | - | 15,521 | 0 | 23 May, 2025 |
| Rebecca B Robertson | - | 13,783 | 0 | 23 May, 2025 |
| Myoungil Cha | - | 13,699 | 0 | 18 Jun, 2025 |
| Joao Paulo Falcao Malagueira | - | 13,699 | 0 | 18 Jun, 2025 |
| Christopher J Twomey | - | 0 | 12,680 | 10 May, 2022 |
| Brian B Hansen | Evp Chief Commercial Officer | 12,622 | 0 | 29 Nov, 2023 |
| David B Berger | Evp Chief Operating Officer | 6,338 | 0 | 29 Nov, 2023 |
| Douglas A Roeder | - | 0 | 5,658 | 20 Oct, 2021 |
| Dick Allen | - | 0 | 5,000 | 03 Aug, 2021 |
| Douglas A Roeder | - | 2,205 | 0 | 19 May, 2022 |
| Shannon Marie Hansen | Chief Legal Officer | 0 | 1,935 | 13 Nov, 2023 |
| Elizabeth Anne Gasser | Evp, Chief Strategy Officer | 1,066 | 0 | 19 Feb, 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 |
|---|---|---|---|---|---|---|---|---|
| 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 | Elizabeth Anne Gasser | Common Stock | A | 1,503 | $0.00 | 1,503 | D | M |
| 17 Feb, 2026 | John F Sheridan | Common Stock | A | 5,471 | $0.00 | 123,071 | D | M |
| 17 Feb, 2026 | Rick Carpenter | Common Stock | A | 1,437 | $0.00 | 25,689 | 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 | 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 | Mark David Novara | Common Stock | D | 62 | $18.95 | 35,971 | D | F |
| 17 Feb, 2026 | Leigh Vosseller | Common Stock | D | 619 | $18.95 | 38,532 | D | F |
| 17 Feb, 2026 | Susan Morrison | Common Stock | D | 510 | $18.95 | 41,910 | D | F |
| 17 Feb, 2026 | John F Sheridan | Common Stock | D | 1,963 | $18.95 | 121,108 | D | F |
| 17 Feb, 2026 | Shannon Marie Hansen | Common Stock | D | 219 | $18.95 | 21,786 | D | F |
| 17 Feb, 2026 | Elizabeth Anne Gasser | Common Stock | D | 887 | $18.95 | 616 | D | F |
| 17 Feb, 2026 | Rick Carpenter | Common Stock | D | 808 | $18.95 | 24,881 | D | F |
| 17 Feb, 2026 | John F Sheridan | Common Stock | A | 5,983 | $0.00 | 127,091 | D | M |