MMSI · NASDAQ · Medical - Instruments & Supplies

Merit Medical Systems

Makes single-use devices for vascular access, intervention, endoscopy, oncology, and cardiac therapies.

$90.49
After-hours close+0.09 (+0.10%)
At close$90.40(+0.96%)

Breakdown13F · Form 4

Institutions 113.77%Insiders 2.46%

A 13F quarter can total more than the shares outstanding — sub-advisers file the same block twice, and a filer's own share count can be a quarter stale. No split is drawn from it.

Shares outstanding 59.71M · Float 58.27M · 97.6% free float

Top shareholders13F · 13D/G · Form 4

HolderShares% outstandingFormFiled
BlackRock, Inc.9.46M15.85%13FAug 7, 2026
Vanguard Portfolio Management LLC3.47M5.82%13FAug 13, 2026
Vanguard Capital Management LLC2.59M4.34%13FAug 13, 2026
State Street Corp2.47M4.14%13FAug 7, 2026
Conestoga Capital Advisors, LLC1.98M3.32%13FJul 24, 2026

Institutions13F, as of Jun 30, 2026

408 holders · 67.93M shares · 66 new positions · 249 increased · 123 reduced · 65 closed

HolderShares% outstandingChg q/qFiled
BlackRock, Inc.9.46M15.85%+630.2KAug 7, 2026
Vanguard Portfolio Management LLC3.47M5.82%−49.3KAug 13, 2026
Vanguard Capital Management LLC2.59M4.34%−65.7KAug 13, 2026
State Street Corp2.47M4.14%+113.5KAug 7, 2026
Conestoga Capital Advisors, LLC1.98M3.32%−187.7KJul 24, 2026
Geode Capital Management, LLC1.63M2.72%+117.6KAug 12, 2026
Fuller & Thaler Asset Management, Inc.1.61M2.70%−502.5KAug 12, 2026
Dimensional Fund Advisors LP1.46M2.44%+221.5KAug 11, 2026

Beneficial owners13D/G · 5% or more, as filed

Holder% of classSharesFormFiled
BlackRock, Inc.14.10%8.37M13GOct 17, 2025
Vanguard Portfolio Management6.01%3.57M13GApr 29, 2026
Vanguard Capital Management5.23%3.11M13GApr 30, 2026

InsidersForm 4

InsiderRoleShares% outstandingFiled
Fred P. Lampropoulosdirector, officer: Executive Chairman1.03M1.72%Nov 26, 2025
Brian G. Lloydofficer: CHIEF LEGAL OFFICER, SECRETARY62.1K0.10%Jun 8, 2026
Raul Jr. Parraofficer: CFO AND TREASURER58.8K0.10%May 7, 2026
Thomas J. Gundersondirector53.2K0.09%May 21, 2026
Martha Goldberg Aronsondirector, officer: President and CEO49.8K0.08%May 7, 2026
Michel J. Voigtofficer: CHIEF HUMAN RESOURCES OFFICER47.7K0.08%Aug 25, 2026
F. Ann Ed.D. Millnerdirector38.0K0.06%May 19, 2026
Christian Adam Smithofficer: Chief Commercial Officer21.4K0.04%May 13, 2026
Lonny J. Carpenterdirector20.8K0.03%May 19, 2026
Neil W. Petersonofficer: CHIEF OPERATING OFFICER18.1K0.03%Aug 25, 2026

1 ten-percent owner holds 6.0K shares by Form 4, outside the officers-and-directors figure above · 17 people have not refiled in the last 18 months (288.5K shares), so they are not in the figure above

Latest trades

DateInsiderTypeSharesAvg priceOwned after
Aug 24, 2026
Neil W. Petersonofficer: CHIEF OPERATING OFFICER
Sale7,500$90.4518,051
Aug 4, 2026
Neil W. Petersonofficer: CHIEF OPERATING OFFICER
Sale21,449$85.0025,551
May 11, 2026
Christian Adam Smithofficer: Chief Commercial Officer
Purchase1,626$61.002,220
May 7, 2026
Brian G. Lloydofficer: CHIEF LEGAL OFFICER, SECRETARY
Purchase2,000$62.632,000
May 7, 2026
Lynne N. Warddirector
Sale5,000$62.617,809
May 5, 2026
Michel J. Voigtofficer: CHIEF HUMAN RESOURCES OFFICER
Purchase2,250$60.652,265
May 6, 2026
Raul Jr. Parraofficer: CFO AND TREASURER
Purchase1,500$61.0158,843
May 6, 2026
Martha Goldberg Aronsondirector, officer: President and CEO
Purchase2,000$60.4449,792
Jan 6, 2026
Neil W. Petersonofficer: CHIEF OPERATING OFFICER
Sale5,000$90.0028,369
Nov 25, 2025
Fred P. Lampropoulosdirector, officer: Executive Chairman
Sale10,000$88.041,019,955

CongressHouse and Senate disclosures

Not reported.