TNDMHealthcareSmall-Cap
TANDEM DIABETES CARE INC Insider Trading Activity
Every SEC Form 4 insider transaction reported for TANDEM DIABETES CARE INC (TNDM), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud Research Team · SEC Form 4 & insider trading data analysts
Last updated:
Quick Answer
Are TNDM insiders buying or selling?
TANDEM DIABETES CARE INC insiders reported 16 open-market buys ($1.8M) and 159 sells ($292.0M) across 175 Form 4 filings — a net selling position of $290.2M.
Source: SEC EDGAR Form 4
Key Statistics (as of Mar 18, 2026)
Total Form 4 filings
175
SEC EDGAR
Insider filers
20
Insider buys (16)
$1.8M
Insider sells (159)
$292.0M
Insider sentiment
Net sellingNet insider flow of $290.2M in net selling.
Recent TNDM insider transactions
| Date | Insider | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Mar 18, 2026 | Mark David Novara | EVP & CHIEF COMMERCIAL OFFICER | Sale | 187 | $23.05 | $4.3K |
| Mar 9, 2026 | Mark David Novara | EVP & CHIEF COMMERCIAL OFFICER | Sale | 2 | $22.81 | $45.62 |
| Aug 11, 2025 | John F Sheridan | PRESIDENT & CEO | Purchase | 10.0K | $10.23 | $102.3K |
| Aug 11, 2025 | Leigh Vosseller | EVP & CHIEF FINANCIAL OFFICER | Purchase | 13.7K | $10.89 | $149.4K |
| Mar 11, 2025 | Jean-Claude Kyrillos | EVP & Chief Operating Officer | Purchase | 10.5K | $18.12 | $191.0K |
| Nov 22, 2024 | Kim D Blickenstaff | Director | Sale | 40.0K | $31.04 | $1.2M |
| Nov 19, 2024 | Mark David Novara | EVP & CHIEF COMMERCIAL OFFICER | Purchase | 532 | $23.24 | $12.4K |
| Jun 3, 2024 | Dick Allen | Director | Sale | 5.0K | $51.68 | $258.4K |
| Nov 29, 2023 | Dick Allen | Director | Purchase | 5.0K | $18.96 | $94.8K |
| Nov 13, 2023 | Leigh Vosseller | EVP & CHIEF FINANCIAL OFFICER | Purchase | 6.2K | $15.39 | $95.4K |
| Nov 13, 2023 | Shannon Marie Hansen | Chief Legal Officer | Purchase | 1.9K | $15.44 | $29.9K |
| Sep 19, 2023 | Kathleen Mcgroddy-Goetz | Director | Purchase | 1.0K | $21.45 | $21.4K |
| May 23, 2023 | Dick Allen | Director | Purchase | 10.0K | $29.47 | $294.7K |
| May 19, 2023 | Peyton R Howell | Director | Purchase | 3.0K | $30.16 | $90.5K |
| May 16, 2023 | Leigh Vosseller | EVP & CHIEF FINANCIAL OFFICER | Purchase | 3.0K | $32.77 | $98.8K |
| Mar 7, 2023 | David B Berger | EVP & Chief Operating Officer | Sale | 10.0K | $41.19 | $411.9K |
| Dec 19, 2022 | David B Berger | EVP & Chief Operating Officer | Sale | 25.0K | $40.29 | $1.0M |
| Jun 10, 2022 | David B Berger | EVP & Chief Operating Officer | Sale | 10.1K | $65.02 | $656.5K |
| May 19, 2022 | Kim D Blickenstaff | Director | Sale | 10.8K | $92.91 | $999.9K |
| May 10, 2022 | Leigh Vosseller | EVP & CHIEF FINANCIAL OFFICER | Purchase | 2.5K | $74.61 | $186.5K |
| May 10, 2022 | John F Sheridan | PRESIDENT & CEO | Purchase | 2.5K | $69.90 | $174.8K |
| May 10, 2022 | Peyton R Howell | Director | Purchase | 2.0K | $74.85 | $149.7K |
| May 10, 2022 | Christopher J Twomey | Director | Sale | 248 | $111.73 | $27.7K |
| May 4, 2022 | Rebecca B Robertson | Director | Sale | 1.5K | $96.73 | $145.1K |
| Apr 5, 2022 | David B Berger | EVP & Chief Operating Officer | Sale | 1.0K | $117.88 | $117.9K |
Showing the 25 most recent of 175 Form 4 filings for TANDEM DIABETES CARE INC.
Most active TNDM insiders
- David B Berger37 filings
- Kim D Blickenstaff25 filings
- Leigh Vosseller19 filings
- Brian B Hansen16 filings
- John F Sheridan12 filings
Ask anything about TNDM insider activity
Use Trabud's AI agent to query TANDEM DIABETES CARE INC's Form 4 history in plain English — "Show me TNDM CEO purchases this year" or compare it against any other ticker.
Open the AI agentTNDM insider trading FAQ
Are TANDEM DIABETES CARE INC insiders buying or selling?
Across 175 SEC Form 4 filings, TANDEM DIABETES CARE INC (TNDM) insiders reported 16 open-market purchases totaling $1.8M and 159 sales totaling $292.0M. That is a net selling position of $290.2M.
How many insiders trade TNDM stock?
20 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for TANDEM DIABETES CARE INC. The most recent filing was accepted on Mar 18, 2026.
Where does Trabud get TNDM insider trading data?
All TNDM insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.
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