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.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Vosseller Leigh | EVP & CHIEF FINANCIAL OFFICER | 52,040 | Aug 18, 2026 | 5 |
| Sheridan John F | PRESIDENT & CEO | 160,260 | Aug 18, 2026 | 5 |
| Morrison Susan | EVP & Chief Admin. Officer | 52,788 | Aug 18, 2026 | 5 |
| Kyrillos Jean-Claude | EVP & Chief Operating Officer | 30,290 | Aug 18, 2026 | 8 |
| Gasser Elizabeth Anne | EVP, Chief Strategy Officer | 1,396 | Aug 18, 2026 | 7 |
| Carpenter Rick | EVP & Chief Technology Officer | 32,148 | Aug 18, 2026 | 6 |
| Hansen Shannon Marie | EVP & Chief Legal Officer | 31,650 | Aug 18, 2026 | 5 |
| Robertson Rebecca B | Director | 22,542 | May 22, 2026 | 1 |
| Twomey Christopher J | Director | 24,434 | May 22, 2026 | 1 |
| Howell Peyton R | Director | 29,836 | May 22, 2026 | 1 |
| Allen Dick | Other: Chair Emeritus | 28,146 | May 22, 2026 | 1 |
| Sodhi Rajwant | Director | 24,280 | May 22, 2026 | 1 |
| McGroddy-Goetz Kathleen | Director | 26,612 | May 22, 2026 | 1 |
| Cha Myoungil | Director | 22,458 | May 22, 2026 | 1 |
| Malagueira Joao Paulo Falcao | Director | 22,458 | May 22, 2026 | 1 |
| Beaver Sandra | Director | – | May 22, 2026 | 2 |
| Novara Mark David | EVP & CHIEF COMMERCIAL OFFICER | 40,317 | May 19, 2026 | 6 |
| Blickenstaff Kim D | Director | 165,190Indirect | Nov 22, 2024 | 0 |
| Leal James | Chief Manufacturing Officer | 16,876 | May 28, 2024 | 0 |
| Berger David B | EVP & Chief Operating Officer | 6,338 | Nov 29, 2023 | 0 |
| Hansen Brian B | EVP & CHIEF COMMERCIAL OFFICER | 12,622 | Nov 29, 2023 | 0 |
| Roeder Douglas A | Director | 2,205 | May 19, 2022 | 0 |
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.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Jun 10, 2022 (view filing) | Jun 8 | 2 days | Berger David BEVP & Chief Operating Officer | SSale | −10.1K | $65.02 | −$656.5K | −80.4%2.46K after | 2 lots |
| Dec 19, 2022 (view filing) | Dec 15-16 | 4 days | Berger David BEVP & Chief Operating Officer | SSale | −25.0K | $40.29 | −$1.01M | −89.2%3.03K after | 2 lots |
| Mar 7, 2023 (view filing) | Mar 3 | 4 days | Berger David BEVP & Chief Operating Officer | SSale | −10.0K | $41.19 | −$411.9K | −74.8%3.37K after | |
| May 16, 2023 (view filing) | May 12 | 4 days | Vosseller LeighEVP & CHIEF FINANCIAL OFFICER | PPurchase | +3.02K | $32.77 | +$98.8K | +114.0%5.66K after | |
| May 19, 2023 (view filing) | May 17 | 2 days | Howell Peyton RDirector | PPurchase | +3.00K | $30.16 | +$90.5K | +54.1%8.55K after | |
| May 22, 2023 (view filing) | May 18 | 4 days | Allen DickDirector | PPurchase | +10.0K | $29.47 | +$294.7K | +453.5%12.2K after | |
| Sep 19, 2023 (view filing) | Sep 15 | 4 days | McGroddy-Goetz KathleenDirector | PPurchase | +1.00K | $21.45 | +$21.4K | +12.5%9.03K after | |
| Nov 13, 2023 (view filing) | Nov 8 | 5 days | Hansen Shannon MarieChief Legal Officer | PPurchase | +1.94K | $15.44 | +$29.9K | New position1.94K after | |
| Nov 13, 2023 (view filing) | Nov 8 | 5 days | Vosseller LeighEVP & CHIEF FINANCIAL OFFICER | PPurchase | +6.20K | $15.39 | +$95.4K | +109.5%11.9K after | |
| Nov 29, 2023 (view filing) | Nov 27 | 2 days | Allen DickDirector | PPurchase | +5.00K | $18.96 | +$94.8K | +33.4%20.0K after | |
| Jun 3, 2024 (view filing) | May 30 | 4 days | Allen DickDirector | SSale | −5.00K | $51.68 | −$258.4K | −100.0%0 after | |
| Nov 19, 2024 (view filing) | Nov 15 | 4 days | Novara Mark DavidEVP & CHIEF COMMERCIAL OFFICER | PPurchase | +532 | $23.24 | +$12.4K | New position532 after | |
| Nov 22, 2024 (view filing) | Nov 20-21 | 2 days | Blickenstaff Kim DDirector | SSale | −40.0K | $31.04 | −$1.24M | −19.5%165.2K after | 2 lots |
| Mar 11, 2025 (view filing) | Mar 7 | 4 days | Kyrillos Jean-ClaudeEVP & Chief Operating Officer | PPurchase | +10.5K | $18.12 | +$190.9K | New position10.5K after | |
| Aug 11, 2025 (view filing) | Aug 8 | 3 days | Vosseller LeighEVP & CHIEF FINANCIAL OFFICER | PPurchase | +13.7K | $10.89 | +$149.4K | +115.7%25.6K after | |
| Aug 11, 2025 (view filing) | Aug 11 | Same day | Sheridan John FPRESIDENT & CEO | PPurchase | +10.0K | $10.23 | +$102.3K | +10.4%106.3K after | |
| Mar 9, 2026 (view filing) | Mar 5 | 4 days | Novara Mark DavidEVP & CHIEF COMMERCIAL OFFICER | SSale | −2 | $22.81 | −$45.62 | 0.0%36.0K after | 10b5-1 |
| Mar 18, 2026 (view filing) | Mar 17 | 1 day | Novara Mark DavidEVP & CHIEF COMMERCIAL OFFICER | SSale | −187 | $23.05 | −$4.31K | −0.5%37.7K after |