← United States · Coverage record
US · SEC FORM 4
MERIT MEDICAL SYSTEMS INC
MMSI · Nasdaq · CIK 0000856982 · Healthcare · Medical Instruments & Supplies
INSIDER SIGNAL
5 qualifying P purchase groups
in the current 180-day scoring window
23 Form 4 transaction lines observed in the same window
3 sales · 15 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Purchase breadth & concentration
Roles in the peak window: CFO AND TREASURER, CHIEF HUMAN RESOURCES OFFICER, CHIEF LEGAL OFFICER, SECRETARY, Chief Commercial Officer, President and CEO. Concentration uses priced qualifying P lines only and does not change the saved score.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
Showing the six most active owners; 10 additional owner(s) remain in Form 4 evidence.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2026-05-11 · Smith Christian Adam.
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 3,630,733
- Previous report
- 3,934,838
- Avg daily volume
- 581,918
- Days to cover
- 6.2
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-05-11 | Smith Christian Adam | Purchase (P) | Common Stock, No Par Value | 1,626 | USD 61.00 | USD 99,186 | SEC filing ↗ |
| 2026-05-07 | Lloyd Brian G. | Purchase (P) | Common Stock, No Par Value | 2,000 | USD 62.63 | USD 125,260 | SEC filing ↗ |
| 2026-05-06 | Parra Raul Jr. | Purchase (P) | Common Stock, No Par Value | 1,500 | USD 61.01 | USD 91,515 | SEC filing ↗ |
| 2026-05-06 | Aronson Martha Goldberg | Purchase (P) | Common Stock, No Par Value | 2,000 | USD 60.44 | USD 120,880 | SEC filing ↗ |
| 2026-05-05 | Voigt Michel J. | Purchase (P) | Common Stock, No Par Value | 2,250 | USD 60.65 | USD 136,462 | SEC filing ↗ |
| 2020-08-04 | Floyd David | Purchase (P) | Common Stock, No Par Value | 1,159 | USD 43.11 | USD 49,964 | SEC filing ↗ |
Form 4 evidence
49 transaction lines in the latest 365-day window; 364 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-09-04 | Lewis Sheri | Award / grant (A) | Common Stock, No Par Value | 8,371 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-24 | Voigt Michel J. | Gift (G) | Common Stock, No Par Value | 650 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-24 | Peterson Neil W. | Sale (S) | Common Stock, No Par Value | 7,500 | USD 90.45 | USD 678,375 | SEC filing ↗ |
Show recent Form 4 evidence (30 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-09-04 | Lewis Sheri | Award / grant (A) | Common Stock, No Par Value | 8,371 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-24 | Voigt Michel J. | Gift (G) | Common Stock, No Par Value | 650 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-24 | Peterson Neil W. | Sale (S) | Common Stock, No Par Value | 7,500 | USD 90.45 | USD 678,375 | SEC filing ↗ |
| 2026-08-04 | Peterson Neil W. | Sale (S) | Common Stock, No Par Value | 21,449 | USD 85.00 | USD 1,823,165 | SEC filing ↗ |
| 2026-06-15 | Voigt Michel J. | Gift (G) | Common Stock, No Par Value | 65 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-05 | Lloyd Brian G. | Gift (G) | Common Stock, No Par Value | 2,000 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-20 | Gunderson Thomas J. | Option exercise / conversion (M) | Common Stock, No Par Value | 21,250 | USD 52.17 | USD 1,108,612 | SEC filing ↗ |
| 2026-05-18 | Ward Scott R. | Award / grant (A) | Common Stock, No Par Value | 3,457 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-18 | Ward Lynne N. | Award / grant (A) | Common Stock, No Par Value | 3,457 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-18 | Perez Silvia M. | Award / grant (A) | Common Stock, No Par Value | 3,457 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-18 | Millner F. Ann Ed.D. | Award / grant (A) | Common Stock, No Par Value | 3,457 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-18 | McDonnell Michael R. | Award / grant (A) | Common Stock, No Par Value | 3,457 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-18 | Kaiser Laura S. | Award / grant (A) | Common Stock, No Par Value | 3,457 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-18 | Gunderson Thomas J. | Award / grant (A) | Common Stock, No Par Value | 3,457 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-18 | Evans Stephen C. | Award / grant (A) | Common Stock, No Par Value | 3,457 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-18 | Carpenter Lonny J. | Award / grant (A) | Common Stock, No Par Value | 3,457 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-11 | Smith Christian Adam | Purchase (P) | Common Stock, No Par Value | 1,626 | USD 61.00 | USD 99,186 | SEC filing ↗ |
| 2026-05-07 | Ward Lynne N. | Sale (S) | Common Stock, No Par Value | 5,000 | USD 62.61 | USD 313,050 | SEC filing ↗ |
| 2026-05-07 | Lloyd Brian G. | Purchase (P) | Common Stock, No Par Value | 2,000 | USD 62.63 | USD 125,260 | SEC filing ↗ |
| 2026-05-06 | Parra Raul Jr. | Purchase (P) | Common Stock, No Par Value | 1,500 | USD 61.01 | USD 91,515 | SEC filing ↗ |
| 2026-05-06 | Aronson Martha Goldberg | Purchase (P) | Common Stock, No Par Value | 2,000 | USD 60.44 | USD 120,880 | SEC filing ↗ |
| 2026-05-05 | Voigt Michel J. | Purchase (P) | Common Stock, No Par Value | 2,250 | USD 60.65 | USD 136,462 | SEC filing ↗ |
| 2026-02-26 | Voigt Michel J. | Tax withholding (F) | Common Stock, No Par Value | 6,698 | USD 78.02 | USD 522,578 | SEC filing ↗ |
| 2026-02-26 | Voigt Michel J. | Award / grant (A) | Common Stock, No Par Value | 31,101 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-26 | Smith Christian Adam | Tax withholding (F) | Common Stock, No Par Value | 2,018 | USD 78.02 | USD 157,444 | SEC filing ↗ |
| 2026-02-26 | Smith Christian Adam | Award / grant (A) | Common Stock, No Par Value | 21,374 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-26 | Peterson Neil W. | Tax withholding (F) | Common Stock, No Par Value | 6,061 | USD 78.02 | USD 472,879 | SEC filing ↗ |
| 2026-02-26 | Peterson Neil W. | Award / grant (A) | Common Stock, No Par Value | 24,692 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-26 | Parra Raul Jr. | Tax withholding (F) | Common Stock, No Par Value | 5,778 | USD 78.02 | USD 450,800 | SEC filing ↗ |
| 2026-02-26 | Parra Raul Jr. | Award / grant (A) | Common Stock, No Par Value | 38,920 | USD 0.00 | USD 0 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-19 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | MMSI |
| CIK | 0000856982 |
| Sector | Healthcare |
| Industry | Medical Instruments & Supplies Yahoo Finance |
| SEC SIC | 3841 Surgical & Medical Instruments & Apparatus |
| Exchange | Nasdaq |
Data coverage
| Local Form 4 history | 364 transaction lines from 2020-03-02 to 2026-09-04 6 P purchase lines · 94 S sale lines · 264 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-19. Mapping status is an audit field and does not erase SEC filing evidence.