TANDEM DIABETES CARE INC (TNDM)
Data as of , from SEC Form 4 filings.
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About TANDEM DIABETES CARE INC (TNDM)
TANDEM DIABETES CARE INC is an SEC registrant, filing under CIK 0001438133, classified as surgical and medical instruments and apparatus. We track it alongside the rest of the Health Care sector.
TNDM Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Option exercise | 28 | 72,088 | |
| Tax withholding / forfeiture | 14 | 17,278 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
TNDM insider transactions (Form 4)
12078 Form 4 filings on record, the earliest from Nov 19, 2024, newest first. Filing history page 1 of 3.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Leigh Vosseller - Officer | Option exercise | Common Stock | 1,496 | $0.00 | - | |
| Leigh Vosseller - Officer | Tax withholding / forfeiture | Common Stock | 537 | $22.72 | $12K | |
| Leigh Vosseller - Officer | Option exercise | Common Stock | 2,624 | $0.00 | - | |
| Leigh Vosseller - Officer | Tax withholding / forfeiture | Common Stock | 942 | $22.72 | $21K | |
| Leigh Vosseller - Officer | Option exercise | Restricted Stock Unit | 1,496 | $0.00 | - | |
| Leigh Vosseller - Officer | Option exercise | Restricted Stock Unit | 2,624 | $0.00 | - | |
 John F. Sheridan - Officer | Option exercise | Common Stock | 5,982 | $0.00 | - | |
| John F. Sheridan - Officer | Tax withholding / forfeiture | Common Stock | 3,044 | $22.72 | $69K | |
| John F. Sheridan - Officer | Option exercise | Common Stock | 9,934 | $0.00 | - | |
| John F. Sheridan - Officer | Tax withholding / forfeiture | Common Stock | 5,055 | $22.72 | $115K | |
| John F. Sheridan - Officer | Option exercise | Restricted Stock Unit | 5,982 | $0.00 | - | |
| John F. Sheridan - Officer | Option exercise | Restricted Stock Unit | 9,934 | $0.00 | - | |
| Susan Morrison - Officer | Option exercise | Common Stock | 1,097 | $0.00 | - | |
| Susan Morrison - Officer | Tax withholding / forfeiture | Common Stock | 314 | $22.72 | $7K | |
| Susan Morrison - Officer | Option exercise | Common Stock | 1,730 | $0.00 | - | |
| Susan Morrison - Officer | Tax withholding / forfeiture | Common Stock | 495 | $22.72 | $11K | |
| Susan Morrison - Officer | Option exercise | Restricted Stock Unit | 1,097 | $0.00 | - | |
| Susan Morrison - Officer | Option exercise | Restricted Stock Unit | 1,730 | $0.00 | - | |
| Jean-Claude Kyrillos - Officer | Option exercise | Common Stock | 1,010 | $0.00 | - | |
| Jean-Claude Kyrillos - Officer | Tax withholding / forfeiture | Common Stock | 535 | $22.72 | $12K | |
| Jean-Claude Kyrillos - Officer | Option exercise | Restricted Stock Unit | 1,010 | $0.00 | - | |
 Elizabeth Anne Gasser - Officer | Option exercise | Common Stock | 1,097 | $0.00 | - | |
| Elizabeth Anne Gasser - Officer | Tax withholding / forfeiture | Common Stock | 589 | $22.72 | $13K | |
| Elizabeth Anne Gasser - Officer | Option exercise | Common Stock | 1,917 | $0.00 | - | |
| Elizabeth Anne Gasser - Officer | Tax withholding / forfeiture | Common Stock | 1,029 | $22.72 | $23K | |
| Elizabeth Anne Gasser - Officer | Option exercise | Restricted Stock Unit | 1,097 | $0.00 | - | |
| Elizabeth Anne Gasser - Officer | Option exercise | Restricted Stock Unit | 1,917 | $0.00 | - | |
| Rick Carpenter - Officer | Option exercise | Common Stock | 897 | $0.00 | - | |
| Rick Carpenter - Officer | Tax withholding / forfeiture | Common Stock | 457 | $22.72 | $10K | |
| Rick Carpenter - Officer | Option exercise | Common Stock | 1,610 | $0.00 | - | |
| Rick Carpenter - Officer | Tax withholding / forfeiture | Common Stock | 820 | $22.72 | $19K | |
| Rick Carpenter - Officer | Option exercise | Restricted Stock Unit | 897 | $0.00 | - | |
| Rick Carpenter - Officer | Option exercise | Restricted Stock Unit | 1,610 | $0.00 | - | |
| Shannon Marie Hansen - Officer | Option exercise | Common Stock | 1,097 | $0.00 | - | |
| Shannon Marie Hansen - Officer | Tax withholding / forfeiture | Common Stock | 559 | $22.72 | $13K | |
| Shannon Marie Hansen - Officer | Option exercise | Common Stock | 1,917 | $0.00 | - | |
| Shannon Marie Hansen - Officer | Tax withholding / forfeiture | Common Stock | 976 | $22.72 | $22K | |
| Shannon Marie Hansen - Officer | Option exercise | Restricted Stock Unit | 1,097 | $0.00 | - | |
| Shannon Marie Hansen - Officer | Option exercise | Restricted Stock Unit | 1,917 | $0.00 | - | |
| Jean-Claude Kyrillos - Officer | Option exercise | Common Stock | 3,636 | $0.00 | - | |
| Jean-Claude Kyrillos - Officer | Tax withholding / forfeiture | Common Stock | 1,926 | $15.28 | $29K | |
| Jean-Claude Kyrillos - Officer | Option exercise | Restricted Stock Unit | 3,636 | $0.00 | - | |
| Elizabeth Anne Gasser - Officer | Gift | Common Stock | 7,160 | $0.00 | - | |
| Elizabeth Anne Gasser - Officer | Gift | Common Stock | 7,160 | $0.00 | - | |
| John F. Sheridan - Officer | Grant or award | Restricted Stock Unit | 191,103 | $0.00 | - | |
| Elizabeth Anne Gasser - Officer | Grant or award | Restricted Stock Unit | 29,136 | $0.00 | - | |
| Leigh Vosseller - Officer | Grant or award | Restricted Stock Unit | 62,657 | $0.00 | - | |
| Jean-Claude Kyrillos - Officer | Grant or award | Restricted Stock Unit | 29,136 | $0.00 | - | |
| Susan Morrison - Officer | Grant or award | Restricted Stock Unit | 29,136 | $0.00 | - | |
| Rick Carpenter - Officer | Grant or award | Restricted Stock Unit | 26,003 | $0.00 | - | |
| Shannon Marie Hansen - Officer | Grant or award | Restricted Stock Unit | 29,136 | $0.00 | - | |
 Dick Allen | Option exercise | Common Stock | 8,759 | $0.00 | - | |
| Dick Allen | Grant or award | Restricted Stock Unit | 10,220 | $0.00 | - | |
| Dick Allen | Option exercise | Restricted Stock Unit | 8,759 | $0.00 | - | |
| Peyton R. Howell - Director | Grant or award | Restricted Stock Unit | 10,220 | $0.00 | - | |
| Peyton R. Howell - Director | Option exercise | Common Stock | 8,759 | $0.00 | - | |
| Peyton R. Howell - Director | Option exercise | Restricted Stock Unit | 8,759 | $0.00 | - | |
| Joao Paulo Falcao Malagueira - Director | Option exercise | Common Stock | 8,759 | $0.00 | - | |
| Joao Paulo Falcao Malagueira - Director | Grant or award | Restricted Stock Unit | 10,220 | $0.00 | - | |
| Joao Paulo Falcao Malagueira - Director | Option exercise | Restricted Stock Unit | 8,759 | $0.00 | - | |
| Sandra Beaver - Director | Grant or award | Restricted Stock Unit | 5,110 | $0.00 | - | |
| Rajwant Sodhi - Director | Option exercise | Common Stock | 8,759 | $0.00 | - | |
| Rajwant Sodhi - Director | Grant or award | Restricted Stock Unit | 10,220 | $0.00 | - | |
| Rajwant Sodhi - Director | Option exercise | Restricted Stock Unit | 8,759 | $0.00 | - | |
 Kathleen McGroddy-Goetz - Director | Option exercise | Common Stock | 8,759 | $0.00 | - | |
| Kathleen McGroddy-Goetz - Director | Grant or award | Restricted Stock Unit | 10,220 | $0.00 | - | |
| Kathleen McGroddy-Goetz - Director | Option exercise | Restricted Stock Unit | 8,759 | $0.00 | - | |
| Rebecca B. Robertson - Director | Option exercise | Common Stock | 8,759 | $0.00 | - | |
| Rebecca B. Robertson - Director | Grant or award | Restricted Stock Unit | 10,220 | $0.00 | - | |
| Rebecca B. Robertson - Director | Option exercise | Restricted Stock Unit | 8,759 | $0.00 | - | |
| Christopher J. Twomey - Director | Option exercise | Common Stock | 8,759 | $0.00 | - | |
| Christopher J. Twomey - Director | Grant or award | Restricted Stock Unit | 10,220 | $0.00 | - | |
| Christopher J. Twomey - Director | Option exercise | Restricted Stock Unit | 8,759 | $0.00 | - | |
| Myoungil Cha - Director | Option exercise | Common Stock | 8,759 | $0.00 | - | |
| Myoungil Cha - Director | Grant or award | Restricted Stock Unit | 10,220 | $0.00 | - | |
| Myoungil Cha - Director | Option exercise | Restricted Stock Unit | 8,759 | $0.00 | - | |
| Rick Carpenter - Officer | Option exercise | Common Stock | 1,437 | $0.00 | - | |
| Rick Carpenter - Officer | Option exercise | Common Stock | 898 | $0.00 | - | |
| Rick Carpenter - Officer | Option exercise | Common Stock | 6,439 | $0.00 | - | |
| Rick Carpenter - Officer | Tax withholding / forfeiture | Common Stock | 732 | $12.82 | $9K | |
| Rick Carpenter - Officer | Tax withholding / forfeiture | Common Stock | 457 | $12.82 | $6K | |
| Rick Carpenter - Officer | Tax withholding / forfeiture | Common Stock | 3,277 | $12.82 | $42K | |
| Rick Carpenter - Officer | Grant or award | Common Stock | 1,336 | $10.90 | $15K | |
| Rick Carpenter - Officer | Option exercise | Restricted Stock Unit | 1,437 | $0.00 | - | |
| Rick Carpenter - Officer | Option exercise | Restricted Stock Unit | 898 | $0.00 | - | |
| Rick Carpenter - Officer | Option exercise | Restricted Stock Unit | 6,439 | $0.00 | - | |
| Elizabeth Anne Gasser - Officer | Option exercise | Common Stock | 1,503 | $0.00 | - | |
| Elizabeth Anne Gasser - Officer | Option exercise | Common Stock | 1,097 | $0.00 | - | |
| Elizabeth Anne Gasser - Officer | Option exercise | Common Stock | 7,667 | $0.00 | - | |
| Elizabeth Anne Gasser - Officer | Tax withholding / forfeiture | Common Stock | 807 | $12.82 | $10K | |
| Elizabeth Anne Gasser - Officer | Tax withholding / forfeiture | Common Stock | 589 | $12.82 | $8K | |
| Elizabeth Anne Gasser - Officer | Tax withholding / forfeiture | Common Stock | 4,114 | $12.82 | $53K | |
| Elizabeth Anne Gasser - Officer | Grant or award | Common Stock | 1,337 | $10.90 | $15K | |
| Elizabeth Anne Gasser - Officer | Option exercise | Restricted Stock Unit | 1,503 | $0.00 | - | |
| Elizabeth Anne Gasser - Officer | Option exercise | Restricted Stock Unit | 1,097 | $0.00 | - | |
| Elizabeth Anne Gasser - Officer | Option exercise | Restricted Stock Unit | 7,667 | $0.00 | - | |
| Shannon Marie Hansen - Officer | Option exercise | Restricted Stock Unit | 1,437 | $0.00 | - | |
| Shannon Marie Hansen - Officer | Option exercise | Restricted Stock Unit | 1,097 | $0.00 | - | |
| Shannon Marie Hansen - Officer | Option exercise | Restricted Stock Unit | 7,667 | $0.00 | - | |
| Shannon Marie Hansen - Officer | Option exercise | Common Stock | 1,437 | $0.00 | - | |
| Shannon Marie Hansen - Officer | Option exercise | Common Stock | 1,097 | $0.00 | - | |
| Shannon Marie Hansen - Officer | Option exercise | Common Stock | 7,667 | $0.00 | - | |
| Shannon Marie Hansen - Officer | Tax withholding / forfeiture | Common Stock | 732 | $12.82 | $9K | |
| Shannon Marie Hansen - Officer | Tax withholding / forfeiture | Common Stock | 559 | $12.82 | $7K | |
| Shannon Marie Hansen - Officer | Tax withholding / forfeiture | Common Stock | 3,901 | $12.82 | $50K | |
| Shannon Marie Hansen - Officer | Grant or award | Common Stock | 1,886 | $10.90 | $21K | |
| Jean-Claude Kyrillos - Officer | Option exercise | Common Stock | 4,038 | $0.00 | - | |
| Jean-Claude Kyrillos - Officer | Tax withholding / forfeiture | Common Stock | 2,139 | $12.82 | $27K | |
| Jean-Claude Kyrillos - Officer | Grant or award | Common Stock | 434 | $10.90 | $5K | |
| Jean-Claude Kyrillos - Officer | Option exercise | Restricted Stock Unit | 4,038 | $0.00 | - | |
| Susan Morrison - Officer | Option exercise | Common Stock | 1,503 | $0.00 | - | |
| Susan Morrison - Officer | Option exercise | Common Stock | 1,097 | $0.00 | - | |
| Susan Morrison - Officer | Option exercise | Common Stock | 6,923 | $0.00 | - | |
| Susan Morrison - Officer | Tax withholding / forfeiture | Common Stock | 430 | $12.82 | $6K | |
| Susan Morrison - Officer | Tax withholding / forfeiture | Common Stock | 314 | $12.82 | $4K | |
| Susan Morrison - Officer | Tax withholding / forfeiture | Common Stock | 1,980 | $12.82 | $25K | |
| Susan Morrison - Officer | Grant or award | Common Stock | 1,336 | $10.90 | $15K | |
| Susan Morrison - Officer | Option exercise | Restricted Stock Unit | 1,503 | $0.00 | - | |
| Susan Morrison - Officer | Option exercise | Restricted Stock Unit | 1,097 | $0.00 | - | |
| Susan Morrison - Officer | Option exercise | Restricted Stock Unit | 6,923 | $0.00 | - |
Item 2.02, 9.01
Item 3.03, 5.02, 5.07, 9.01
Item 5.02
Item 2.02, 9.01
Recent TNDM Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| MARK NOVARA | Officer | 360 | $6K | View on EDGAR | |
| MARK NOVARA | Officer | 131 | $3K |
Stock trades in TNDM disclosed by members of the U.S. House in the last 12 months, newest first. Values are the ranges as filed.
| Member | Type | Traded | Disclosed | Value range | Owner | Days to disclose | Filing |
|---|---|---|---|---|---|---|---|
 Gilbert Ray Cisneros, Jr.Democrat, CA-31 | Purchase |
TNDM insider trading FAQ
What is the latest insider trade for TNDM?
TANDEM DIABETES CARE INC (TNDM) had 8 insider filings in the last 90 days, with the most recent on 2026-08-18. The full record for TNDM runs to 78 Form 4 filings, the earliest from 2024-11-19. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying TNDM stock?
No insider purchases of TNDM were filed in the last 90 days. 3 purchases are on record for this company.
How many insiders are selling TNDM stock?
No insider sales of TNDM were filed in the last 90 days. 4 sales are on record for this company.
Where can I see TNDM SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects TNDM Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Health Care companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Leigh Vosseller view on EDGAR
- - John F. Sheridan view on EDGAR
- - Susan Morrison view on EDGAR
- - Jean-Claude Kyrillos view on EDGAR
- - Elizabeth Anne Gasser view on EDGAR
- - Rick Carpenter view on EDGAR
- - Shannon Marie Hansen view on EDGAR
- - Jean-Claude Kyrillos view on EDGAR
- - Elizabeth Anne Gasser view on EDGAR
Related companies with recent insider activity
Learn more
- What the Form 4 transaction codes mean
- Grants, option exercises, gifts and tax withholding are not trades on the market. The codes say which is which.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Health Care
- Where TNDM's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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