Insider txns (12m)
52
Stock / equity
MMSI MERIT MEDICAL SYSTEMS INC
- Company
- MERIT MEDICAL SYSTEMS INC
- Security
- Equity
- Size, estimated from filings
- Mid cap ($2B – $10B)
- Insiders on record
- 17
- Members of Congress
- 1
- Latest trade on record
- September 4, 2026
MMSI (MERIT MEDICAL SYSTEMS INC) has 52 disclosed insider transactions from 17 insiders in the last 12 months (5 open-market buys, 13 sales, about $12.5M at reported prices) and 1 congressional trade from 1 member of Congress. The most recent disclosure was filed September 9, 2026.
Open-market buys / sales
5 / 13
Congress trades (12m)
1
Distinct filers (12m)
18
Share price
Price and chart by TradingView for MERIT MEDICAL SYSTEMS INC. US share prices here are delayed, not real-time. The trade records on this page come from government filings, not from this chart.
MMSI in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
BoughtSold
8 people account for the disclosed buying and selling in MMSI over the last 12 months; the most active is Lampropoulos Fred P. with $5.2M.
Prices insiders traded at
What price did insiders buy and sell at? Each marker is one open-market trade at the share price reported on its Form 4.
▲ Bought▼ SoldAverage reported price that day
Insiders reported 13 open-market trades in MMSI since Nov 18, 2025, at prices from $60.44 to $90.45; the most recent was a sale at $90.45 on Aug 24, 2026. These are the prices on the filings, not adjusted for stock splits, and not a market price series.
Insider holdings over time
Is an insider building or unwinding a position? Shares held directly after each filing.
Peterson Neil W.Voigt Michel J.
Peterson Neil W. reported 18,051 shares held after the latest filing, against 28,369 at the first on record.
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 trading MMSI
Everyone who filed a Form 4 for this ticker, by number of rows on record. "Bought" and "sold" count open-market purchases (code P) and sales only; awards, option exercises and shares withheld for tax are in the row count but not in those two columns. Showing 15 of 17.
| Insider | Role | Rows | Bought | Sold | Value bought | Value sold | Latest |
|---|---|---|---|---|---|---|---|
| Peterson Neil W. | CHIEF OPERATING OFFICER | 8 | 0 | 4 | — | $3.4M | August 24, 2026 |
| Voigt Michel J. | CHIEF HUMAN RESOURCES OFFICER | 7 | 1 | 1 | $136K | $523K | August 24, 2026 |
| Lloyd Brian G. | CHIEF LEGAL OFFICER, SECRETARY | 6 | 1 | 1 | $125K | $451K | June 5, 2026 |
| Gunderson Thomas J. | Director | 5 | 0 | 0 | — | — | May 20, 2026 |
| Smith Christian Adam | Chief Commercial Officer | 5 | 1 | 1 | $99K | $157K | May 11, 2026 |
| Parra Raul Jr. | CFO AND TREASURER | 5 | 1 | 1 | $92K | $451K | May 6, 2026 |
| Lampropoulos Fred P. | Executive Chairman | 4 | 0 | 4 | — | $5.2M | November 25, 2025 |
| Aronson Martha Goldberg | President and CEO | 3 | 1 | 0 | $121K | — | May 6, 2026 |
| Ward Lynne N. | Director | 2 | 0 | 1 | — | $313K | May 18, 2026 |
| Lewis Sheri | EVP of Global Operations | 1 | 0 | 0 | — | — | September 4, 2026 |
| Carpenter Lonny J. | Director | 1 | 0 | 0 | — | — | May 18, 2026 |
| Evans Stephen C. | Director | 1 | 0 | 0 | — | — | May 18, 2026 |
| Kaiser Laura S. | Director | 1 | 0 | 0 | — | — | May 18, 2026 |
| McDonnell Michael R. | Director | 1 | 0 | 0 | — | — | May 18, 2026 |
| Millner F. Ann Ed.D. | Director | 1 | 0 | 0 | — | — | May 18, 2026 |
What kind of transactions these are 6 Form 4 codes
| Code | Meaning | Rows | Shares | Value at reported prices |
|---|---|---|---|---|
| A | Grant or award | 26 | 237,028 | — |
| S | Open-market sale | 8 | 98,949 | $8.5M |
| M | Option exercise or conversion | 6 | 52,500 | $1.4M |
| F | Shares withheld for tax | 5 | 26,333 | $2.1M |
| P | Open-market purchase | 5 | 9,376 | $573K |
| G | Gift | 3 | 2,715 | — |
What each code means: Form 4 transaction codes.
Members of Congress trading MMSI
Members whose periodic transaction reports name this ticker. Amounts are the sums of the ranges as filed.
| 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 | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Lewis Sheri | Other A | September 4, 2026 | September 9, 2026 | 5d | 8,371 | — | — | late | Form 4 ↗ | |
| Peterson Neil W. | Sell S | August 24, 2026 | August 25, 2026 | 1d | 7,500 | $90 | $678K | Form 4 ↗ | ||
| Voigt Michel J. | Other G | August 24, 2026 | August 25, 2026 | 1d | 650 | — | — | Form 4 ↗ | ||
| Peterson Neil W. | Sell S | August 4, 2026 | August 5, 2026 | 1d | 21,449 | $85 | $1.8M | Form 4 ↗ | ||
| Voigt Michel J. | Other G | June 15, 2026 | June 17, 2026 | 2d | 65 | — | — | Form 4 ↗ | ||
| Lloyd Brian G. | Other G | June 5, 2026 | June 8, 2026 | 3d | 2,000 | — | — | Form 4 ↗ | ||
| Gunderson Thomas J. | Option / conversion M | May 20, 2026 | May 21, 2026 | 1d | 7,500 | — | — | derivative | Form 4 ↗ | |
| Gunderson Thomas J. | Option / conversion M | May 20, 2026 | May 21, 2026 | 1d | 13,750 | — | — | derivative | Form 4 ↗ | |
| Gunderson Thomas J. | Option / conversion M | May 20, 2026 | May 21, 2026 | 1d | 7,500 | $52 | $391K | Form 4 ↗ | ||
| Gunderson Thomas J. | Option / conversion M | May 20, 2026 | May 21, 2026 | 1d | 13,750 | $52 | $717K | Form 4 ↗ | ||
| Ward Lynne N. | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Ward Scott R. | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Gunderson Thomas J. | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Evans Stephen C. | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Kaiser Laura S. | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Perez Silvia M. | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Carpenter Lonny J. | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| McDonnell Michael R. | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Millner F. Ann Ed.D. | Other A | May 18, 2026 | May 19, 2026 | 1d | 3,457 | — | — | Form 4 ↗ | ||
| Smith Christian Adam | Buy P | May 11, 2026 | May 13, 2026 | 2d | 1,626 | $61 | $99K | indirect | Form 4 ↗ | |
| Ward Lynne N. | Sell S | May 7, 2026 | May 11, 2026 | 4d | 5,000 | $63 | $313K | Form 4 ↗ | ||
| Lloyd Brian G. | Buy P | May 7, 2026 | May 11, 2026 | 4d | 2,000 | $63 | $125K | indirect | Form 4 ↗ | |
| Aronson Martha Goldberg | Buy P | May 6, 2026 | May 7, 2026 | 1d | 2,000 | $60 | $121K | Form 4 ↗ | ||
| Parra Raul Jr. | Buy P | May 6, 2026 | May 7, 2026 | 1d | 1,500 | $61 | $92K | Form 4 ↗ | ||
| Voigt Michel J. | Buy P | May 5, 2026 | May 7, 2026 | 2d | 2,250 | $61 | $136K | indirect | Form 4 ↗ | |
| Lloyd Brian G. | Sell F | February 26, 2026 | March 2, 2026 | 4d | 5,778 | $78 | $451K | Form 4 ↗ | ||
| Lloyd Brian G. | Other A | February 26, 2026 | March 2, 2026 | 4d | 17,002 | — | — | Form 4 ↗ | ||
| Lloyd Brian G. | Other A | February 26, 2026 | March 2, 2026 | 4d | 6,409 | — | — | Form 4 ↗ | ||
| Lloyd Brian G. | Other A | February 26, 2026 | March 2, 2026 | 4d | 10,254 | — | — | Form 4 ↗ | ||
| Peterson Neil W. | Sell F | February 26, 2026 | March 2, 2026 | 4d | 6,061 | $78 | $473K | Form 4 ↗ | ||
| Peterson Neil W. | Other A | February 26, 2026 | March 2, 2026 | 4d | 17,002 | — | — | Form 4 ↗ | ||
| Peterson Neil W. | Other A | February 26, 2026 | March 2, 2026 | 4d | 7,690 | — | — | Form 4 ↗ | ||
| Aronson Martha Goldberg | Other A | February 26, 2026 | March 2, 2026 | 4d | 28,198 | — | — | Form 4 ↗ | ||
| Voigt Michel J. | Sell F | February 26, 2026 | March 2, 2026 | 4d | 6,698 | $78 | $523K | Form 4 ↗ | ||
| Voigt Michel J. | Other A | February 26, 2026 | March 2, 2026 | 4d | 17,002 | — | — | Form 4 ↗ | ||
| Voigt Michel J. | Other A | February 26, 2026 | March 2, 2026 | 4d | 6,409 | — | — | Form 4 ↗ | ||
| Voigt Michel J. | Other A | February 26, 2026 | March 2, 2026 | 4d | 7,690 | — | — | Form 4 ↗ | ||
| Smith Christian Adam | Sell F | February 26, 2026 | March 2, 2026 | 4d | 2,018 | $78 | $157K | Form 4 ↗ | ||
| Smith Christian Adam | Other A | February 26, 2026 | March 2, 2026 | 4d | 6,762 | — | — | Form 4 ↗ | ||
| Smith Christian Adam | Other A | February 26, 2026 | March 2, 2026 | 4d | 6,409 | — | — | Form 4 ↗ | ||
| Smith Christian Adam | Other A | February 26, 2026 | March 2, 2026 | 4d | 8,203 | — | — | Form 4 ↗ | ||
| Parra Raul Jr. | Sell F | February 26, 2026 | March 2, 2026 | 4d | 5,778 | $78 | $451K | Form 4 ↗ | ||
| Parra Raul Jr. | Other A | February 26, 2026 | March 2, 2026 | 4d | 17,002 | — | — | Form 4 ↗ | ||
| Parra Raul Jr. | Other A | February 26, 2026 | March 2, 2026 | 4d | 9,613 | — | — | Form 4 ↗ | ||
| Parra Raul Jr. | Other A | February 26, 2026 | March 2, 2026 | 4d | 12,305 | — | — | Form 4 ↗ | ||
| Peterson Neil W. | Option / conversion M | January 6, 2026 | January 8, 2026 | 2d | 5,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Peterson Neil W. | Sell S | January 6, 2026 | January 8, 2026 | 2d | 5,000 | $90 | $450K | 10b5-1 plan | Form 4 ↗ | |
| Peterson Neil W. | Option / conversion M | January 6, 2026 | January 8, 2026 | 2d | 5,000 | $54 | $272K | 10b5-1 plan | Form 4 ↗ | |
| Lampropoulos Fred P. | Sell S | November 25, 2025 | November 26, 2025 | 1d | 10,000 | $88 | $880K | Form 4 ↗ | ||
| Lampropoulos Fred P. | Sell S | November 21, 2025 | November 24, 2025 | 3d | 25,000 | $87 | $2.2M | Form 4 ↗ | ||
| Lampropoulos Fred P. | Sell S | November 20, 2025 | November 21, 2025 | 1d | 20,000 | $85 | $1.7M | Form 4 ↗ | ||
| Lampropoulos Fred P. | Sell S | November 18, 2025 | November 20, 2025 | 2d | 5,000 | $85 | $424K | Form 4 ↗ | ||
| Aronson Martha Goldberg | Other A | October 3, 2025 | October 7, 2025 | 4d | 19,594 | — | — | Form 4 ↗ |
Congressional trades
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Lisa C. McClain | Sell | September 25, 2025 | October 22, 2025 | 27d | — | — | $1,001–$15K | spouse | House PTR ↗ |
Related stocks
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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.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- How to read a congressional trade report Owner tells you whose asset it was: the member, the spouse, a dependent child, or held jointly.
- Why congressional trade amounts are ranges There are ten ranges; the lowest is $1,001–$15,000 and the highest is over $50,000,000.
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 |
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.
Insider rows are Form 4 filings for this issuer from SEC EDGAR; congressional rows are periodic transaction reports parsed from the House Clerk and the Senate eFD. Values use the reported price for Form 4 and the disclosed range for Congress. See methodology and corrections.
Not investment advice. Disclosures are shown as filed and may lag the trade or be amended. No recommendation is made or implied.