As of March 23, 2026, Tandem Diabetes Care's top three insider holders are John F Sheridan (President Ceo, 124.69K shares), Susan Morrison (Evp Chief Admin. Officer, 42.63K shares), Leigh Vosseller (Evp Chief Financial Officer, 39.41K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| 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 |
| Mark David Novara | Evp Chief Commercial Officer | 35,969 | 0 | 09 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 | |
| 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 | |
| Myoungil Cha | 13,699 | 0 | 18 Jun, 2025 | |
| Joao Paulo Falcao Malagueira | 13,699 | 0 | 18 Jun, 2025 | |
| Brian B Hansen | Evp Chief Commercial Officer | 12,622 | 0 | 29 Nov, 2023 |
| Christopher J Twomey | 0 | 7,568 | 10 May, 2022 | |
| David B Berger | Evp Chief Operating Officer | 6,338 | 0 | 29 Nov, 2023 |
| Douglas A Roeder | 0 | 3,766 | 20 Oct, 2021 | |
| Douglas A Roeder | 0 | 3,766 | 20 Oct, 2021 | |
| Douglas A Roeder | 2,205 | 0 | 19 May, 2022 | |
| 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 |
| David B Berger | Evp, Chief Business/Compliance | 0 | 242 | 20 May, 2021 |
* 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 |
| 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 | Rick Carpenter | Common Stock | A | 1,437 | $0.00 | 25,689 | D | M |
| 17 Feb, 2026 | Mark David Novara | Common Stock | A | 77 | $0.00 | 36,033 | D | M |
| 17 Feb, 2026 | Susan Morrison | Common Stock | A | 1,503 | $0.00 | 42,420 | D | M |
| 17 Feb, 2026 | John F Sheridan | Common Stock | A | 5,471 | $0.00 | 123,071 | D | M |
| 17 Feb, 2026 | Shannon Marie Hansen | Common Stock | A | 531 | $0.00 | 22,005 | D | M |
| 17 Feb, 2026 | Mark David Novara | Common Stock | A | 77 | $0.00 | 36,033 | 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 | D | 219 | $18.95 | 21,786 | D | F |
| 17 Feb, 2026 | Leigh Vosseller | Common Stock | D | 619 | $18.95 | 38,532 | D | F |
| 17 Feb, 2026 | John F Sheridan | Common Stock | D | 1,963 | $18.95 | 121,108 | D | F |
| 17 Feb, 2026 | Mark David Novara | Common Stock | D | 62 | $18.95 | 35,971 | D | F |
| 17 Feb, 2026 | Susan Morrison | Common Stock | D | 510 | $18.95 | 41,910 | D | F |
| 17 Feb, 2026 | Rick Carpenter | Common Stock | D | 808 | $18.95 | 24,881 | D | F |