Company / CIK 0000856982
MERIT MEDICAL SYSTEMS INC
- Ticker
- MMSI
- Size, estimated from filings
- Mid cap ($2B – $10B)
- Insiders on file
- 17
- Members of Congress who traded it
- 1
- Federal contracts on record
- none matched
- Lobbying filings on record
- 5
- SEC filings
- EDGAR ↗
- Latest trade on record
- September 4, 2026
MERIT MEDICAL SYSTEMS INC (MMSI) has 17 insiders on file who disclosed 52 transactions in the last 12 months (5 open-market buys, 13 sales, about $12.5M at reported prices), and 1 congressional trade in its stock is on record. No federal contract award that started in the last 180 days was found for a recipient with exactly this name, and 3 lobbying filings naming it as client report $30K in 2026.
MERIT MEDICAL SYSTEMS INC in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
8 people account for the disclosed buying and selling in MERIT MEDICAL SYSTEMS INC over the last 12 months; the most active is Lampropoulos Fred P. with $5.2M.
Lobbying spend by quarter
How much has MERIT MEDICAL SYSTEMS INC reported spending on federal lobbying?
MERIT MEDICAL SYSTEMS INC reported $50K in lobbying over the last eight quarters, from filings matched by exact company name.
Insiders
| Name | Role | Rows | Bought | Sold | Last filed |
|---|---|---|---|---|---|
| Lewis Sheri | EVP of Global Operations | 1 | 0 | 0 | September 9, 2026 |
| Peterson Neil W. | CHIEF OPERATING OFFICER | 8 | 0 | 4 | August 25, 2026 |
| Voigt Michel J. | CHIEF HUMAN RESOURCES OFFICER | 7 | 1 | 1 | August 25, 2026 |
| McDonnell Michael R. | Director | 1 | 0 | 0 | July 10, 2026 |
| Lloyd Brian G. | CHIEF LEGAL OFFICER, SECRETARY | 6 | 1 | 1 | June 8, 2026 |
| Gunderson Thomas J. | Director | 5 | 0 | 0 | May 21, 2026 |
| Ward Lynne N. | Director | 2 | 0 | 1 | May 19, 2026 |
| Millner F. Ann Ed.D. | Director | 1 | 0 | 0 | May 19, 2026 |
| Carpenter Lonny J. | Director | 1 | 0 | 0 | May 19, 2026 |
| Perez Silvia M. | Director | 1 | 0 | 0 | May 19, 2026 |
| Kaiser Laura S. | Director | 1 | 0 | 0 | May 19, 2026 |
| Evans Stephen C. | Director | 1 | 0 | 0 | May 19, 2026 |
| Ward Scott R. | Director | 1 | 0 | 0 | May 19, 2026 |
| Smith Christian Adam | Chief Commercial Officer | 5 | 1 | 1 | May 13, 2026 |
| Aronson Martha Goldberg | President and CEO | 3 | 1 | 0 | May 7, 2026 |
| Parra Raul Jr. | CFO AND TREASURER | 5 | 1 | 1 | May 7, 2026 |
| Lampropoulos Fred P. | Executive Chairman | 4 | 0 | 4 | April 2, 2026 |
Rows are this company's Form 4 rows for each person. "Bought" and "sold" count open-market purchases (code P) and sales only. More in insider buying and insider selling.
Members of Congress who traded MMSI
From periodic transaction reports that name the company's stock. Amounts are the sums of the ranges as filed. Every row is on the MMSI page.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| Lisa C. McClain | Representative (MI, District 9), Republican | 1 | 0 | 1 | $1,001–$15K | September 25, 2025 |
Insider transactions
| Filer | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lewis Sheri | MMSI | Other A | September 4, 2026 | September 9, 2026 | 5d | 8,371 | — | — | late | Form 4 ↗ | |
| Peterson Neil W. | MMSI | Sell S | August 24, 2026 | August 25, 2026 | 1d | 7,500 | $90 | $678K | Form 4 ↗ | ||
| Voigt Michel J. | MMSI | Other G | August 24, 2026 | August 25, 2026 | 1d | 650 | — | — | Form 4 ↗ | ||
| Peterson Neil W. | MMSI | Sell S | August 4, 2026 | August 5, 2026 | 1d | 21,449 | $85 | $1.8M | Form 4 ↗ | ||
| Voigt Michel J. | MMSI | Other G | June 15, 2026 | June 17, 2026 | 2d | 65 | — | — | Form 4 ↗ | ||
| Lloyd Brian G. | MMSI | Other G | June 5, 2026 | June 8, 2026 | 3d | 2,000 | — | — | Form 4 ↗ | ||
| Gunderson Thomas J. | MMSI | Option / conversion M | May 20, 2026 | May 21, 2026 | 1d | 7,500 | — | — | derivative | Form 4 ↗ | |
| Gunderson Thomas J. | MMSI | Option / conversion M | May 20, 2026 | May 21, 2026 | 1d | 13,750 | — | — | derivative | Form 4 ↗ | |
| Gunderson Thomas J. | MMSI | Option / conversion M | May 20, 2026 | May 21, 2026 | 1d | 7,500 | $52 | $391K | Form 4 ↗ | ||
| Gunderson Thomas J. | MMSI | Option / conversion M | May 20, 2026 | May 21, 2026 | 1d | 13,750 | $52 | $717K | Form 4 ↗ | ||
| Ward Lynne N. | MMSI | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Ward Scott R. | MMSI | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Gunderson Thomas J. | MMSI | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Evans Stephen C. | MMSI | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Kaiser Laura S. | MMSI | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Perez Silvia M. | MMSI | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Carpenter Lonny J. | MMSI | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| McDonnell Michael R. | MMSI | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Millner F. Ann Ed.D. | MMSI | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Smith Christian Adam | MMSI | Buy P | May 11, 2026 | May 13, 2026 | 2d | 1,626 | $61 | $99K | indirect | Form 4 ↗ | |
| Ward Lynne N. | MMSI | Sell S | May 7, 2026 | May 11, 2026 | 4d | 5,000 | $63 | $313K | Form 4 ↗ | ||
| Lloyd Brian G. | MMSI | Buy P | May 7, 2026 | May 11, 2026 | 4d | 2,000 | $63 | $125K | indirect | Form 4 ↗ | |
| Aronson Martha Goldberg | MMSI | Buy P | May 6, 2026 | May 7, 2026 | 1d | 2,000 | $60 | $121K | Form 4 ↗ | ||
| Parra Raul Jr. | MMSI | Buy P | May 6, 2026 | May 7, 2026 | 1d | 1,500 | $61 | $92K | Form 4 ↗ | ||
| Voigt Michel J. | MMSI | Buy P | May 5, 2026 | May 7, 2026 | 2d | 2,250 | $61 | $136K | indirect | Form 4 ↗ | |
| Lloyd Brian G. | MMSI | Sell F | February 26, 2026 | March 2, 2026 | 4d | 5,778 | $78 | $451K | Form 4 ↗ | ||
| Lloyd Brian G. | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 17,002 | — | — | Form 4 ↗ | ||
| Lloyd Brian G. | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 6,409 | — | — | Form 4 ↗ | ||
| Lloyd Brian G. | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 10,254 | — | — | Form 4 ↗ | ||
| Peterson Neil W. | MMSI | Sell F | February 26, 2026 | March 2, 2026 | 4d | 6,061 | $78 | $473K | Form 4 ↗ | ||
| Peterson Neil W. | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 17,002 | — | — | Form 4 ↗ | ||
| Peterson Neil W. | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 7,690 | — | — | Form 4 ↗ | ||
| Aronson Martha Goldberg | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 28,198 | — | — | Form 4 ↗ | ||
| Voigt Michel J. | MMSI | Sell F | February 26, 2026 | March 2, 2026 | 4d | 6,698 | $78 | $523K | Form 4 ↗ | ||
| Voigt Michel J. | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 17,002 | — | — | Form 4 ↗ | ||
| Voigt Michel J. | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 6,409 | — | — | Form 4 ↗ | ||
| Voigt Michel J. | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 7,690 | — | — | Form 4 ↗ | ||
| Smith Christian Adam | MMSI | Sell F | February 26, 2026 | March 2, 2026 | 4d | 2,018 | $78 | $157K | Form 4 ↗ | ||
| Smith Christian Adam | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 6,762 | — | — | Form 4 ↗ | ||
| Smith Christian Adam | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 6,409 | — | — | Form 4 ↗ | ||
| Smith Christian Adam | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 8,203 | — | — | Form 4 ↗ | ||
| Parra Raul Jr. | MMSI | Sell F | February 26, 2026 | March 2, 2026 | 4d | 5,778 | $78 | $451K | Form 4 ↗ | ||
| Parra Raul Jr. | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 17,002 | — | — | Form 4 ↗ | ||
| Parra Raul Jr. | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 9,613 | — | — | Form 4 ↗ | ||
| Parra Raul Jr. | MMSI | Other A | February 26, 2026 | March 2, 2026 | 4d | 12,305 | — | — | Form 4 ↗ | ||
| Peterson Neil W. | MMSI | Option / conversion M | January 6, 2026 | January 8, 2026 | 2d | 5,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Peterson Neil W. | MMSI | Sell S | January 6, 2026 | January 8, 2026 | 2d | 5,000 | $90 | $450K | 10b5-1 plan | Form 4 ↗ | |
| Peterson Neil W. | MMSI | Option / conversion M | January 6, 2026 | January 8, 2026 | 2d | 5,000 | $54 | $272K | 10b5-1 plan | Form 4 ↗ | |
| Lampropoulos Fred P. | MMSI | Sell S | November 25, 2025 | November 26, 2025 | 1d | 10,000 | $88 | $880K | Form 4 ↗ | ||
| Lampropoulos Fred P. | MMSI | Sell S | November 21, 2025 | November 24, 2025 | 3d | 25,000 | $87 | $2.2M | Form 4 ↗ | ||
| Lampropoulos Fred P. | MMSI | Sell S | November 20, 2025 | November 21, 2025 | 1d | 20,000 | $85 | $1.7M | Form 4 ↗ | ||
| Lampropoulos Fred P. | MMSI | Sell S | November 18, 2025 | November 20, 2025 | 2d | 5,000 | $85 | $424K | Form 4 ↗ | ||
| Aronson Martha Goldberg | MMSI | Other A | October 3, 2025 | October 7, 2025 | 4d | 19,594 | — | — | Form 4 ↗ |
Federal contracts (USAspending, awards started in the last 180 days)
No contract award starting in the last 180 days was found for a recipient named exactly "MERIT MEDICAL SYSTEMS INC". Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
| Period | Registrant | Primary issue | Amount | Source |
|---|---|---|---|---|
| 2026 Q3 | MERIT MEDICAL SYSTEMS, INC. | Taxation/Internal Revenue Code | $10,000 | LDA ↗ |
| 2026 Q2 | MERIT MEDICAL SYSTEMS, INC. | Taxation/Internal Revenue Code | $10,000 | LDA ↗ |
| 2026 Q1 | MERIT MEDICAL SYSTEMS, INC. | Taxation/Internal Revenue Code | $10,000 | LDA ↗ |
| 2025 Q4 | MERIT MEDICAL SYSTEMS, INC. | Taxation/Internal Revenue Code | $10,000 | LDA ↗ |
| 2025 Q3 | MERIT MEDICAL SYSTEMS, INC. | Taxation/Internal Revenue Code | $10,000 | LDA ↗ |
Related companies
Companies whose stock was traded by the same people who traded MMSI, by number of filers in common. It shows overlap in public filings and nothing else.
- BAXTER INTERNATIONAL INC BAX 2 filers in common
- UNITED THERAPEUTICS Corp UTHR 1 filer in common
- Dell Technologies Inc. DELL 1 filer in common
- Seagate Technology Holdings plc STX 1 filer in common
- Uber Technologies, Inc UBER 1 filer in common
- Datadog, Inc. DDOG 1 filer in common
- Arista Networks, Inc. ANET 1 filer in common
- Meta Platforms, Inc. META 1 filer in common
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- Lobbying disclosure reports Reports are due about 20 days after each quarter ends.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 1 | 1 | October 22, 2025 | October 22, 2025 | House Clerk search |
| SEC EDGAR, Form 4 | 34 | 53 | October 7, 2025 | September 9, 2026 | Form 4 list on EDGAR |
| Lobbying disclosure filings | 5 filings | — | — | — | LDA.gov search |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insiders and their transactions come from SEC EDGAR Form 4 filings for this issuer. Contracts and lobbying are matched by exact normalized name (suffixes like Inc./Corp. ignored) to USAspending recipients and LDA clients — a conservative match that misses subsidiaries on purpose. See methodology and corrections.
Not investment advice. Public records shown as filed; no recommendation is made or implied.