MMSI
MERIT MEDICAL SYSTEMS INC
Surgical & Medical Instruments & ApparatusNasdaqLarge accelerated filer
Total Trades
64
Buys
0
Sells
38
Largest Trade
N/A
Insiders
15
Institutional Funds
323
Inst. Value
$1M+
Activist Filings
14
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Peterson Neil W. | CHIEF OPERATING OF… | SELL | $100K–$500K | 5K | $90.00 | Jan 8, 2026 |
| Peterson Neil W. | CHIEF OPERATING OF… | EXERCISE | $100K–$500K | 5K | $54.40 | Jan 8, 2026 |
| Lampropoulos Fred P. | Executive Chairman | SELL | $500K+ | 10K | $88.04 | Nov 26, 2025 |
| Lampropoulos Fred P. | Executive Chairman | SELL | $1M+ | 25K | $87.31 | Nov 24, 2025 |
| Lampropoulos Fred P. | Executive Chairman | SELL | $1M+ | 20K | $85.13 | Nov 21, 2025 |
| Lampropoulos Fred P. | Executive Chairman | SELL | $100K–$500K | 5K | $84.83 | Nov 20, 2025 |
| Ward Lynne N. | Director | SELL | $100K–$500K | 3K | $88.56 | Aug 25, 2025 |
| Ward Lynne N. | Director | EXERCISE | $100K–$500K | 3K | $34.46 | Aug 25, 2025 |
| Parra Raul Jr. | CFO AND TREASURER | SELL | $1M+ | 15K | $93.75 | Jun 17, 2025 |
| Parra Raul Jr. | CFO AND TREASURER | EXERCISE | $500K+ | 15K | $59.43 | Jun 17, 2025 |
| Lampropoulos Fred P. | President and CEO | SELL | $15K–$50K | 400 | $95.61 | Jun 12, 2025 |
| Lampropoulos Fred P. | President and CEO | SELL | $500K+ | 10K | $95.19 | Jun 9, 2025 |
| McDonnell Michael R. | Director | SELL | $100K–$500K | 4K | $94.41 | Jun 3, 2025 |
| Floyd David | Director | SELL | $100K–$500K | 4K | $94.16 | Jun 3, 2025 |
| Lampropoulos Fred P. | President and CEO | SELL | $500K+ | 10K | $95.12 | Jun 3, 2025 |
| LAMPROPOULOS FRED P | President and CEO | SELL | $1M+ | 20K | $96.54 | May 29, 2025 |
| Millner F. Ann | Director | SELL | $1M+ | 21K | $96.47 | May 19, 2025 |
| Millner F. Ann | Director | EXERCISE | $1M+ | 21K | $52.17 | May 19, 2025 |
| Millner F. Ann | Director | GRANT | N/A | 2K | — | May 19, 2025 |
| Peterson Neil | CHIEF OPERATING OF… | SELL | $500K+ | 5K | $104.53 | Apr 2, 2025 |
| Peterson Neil | CHIEF OPERATING OF… | EXERCISE | $100K–$500K | 5K | $54.40 | Apr 2, 2025 |
| Millner F. Ann | Director | SELL | $1M+ | 13K | $101.55 | Nov 18, 2024 |
| Millner F. Ann | Director | EXERCISE | $500K+ | 13K | $50.50 | Nov 18, 2024 |
| Parra Raul Jr. | CFO AND TREASURER | SELL | $500K+ | 5K | $102.18 | Nov 12, 2024 |
| Parra Raul Jr. | CFO AND TREASURER | EXERCISE | $100K–$500K | 5K | $37.71 | Nov 12, 2024 |
| Peterson Neil | CHIEF OPERATING OF… | SELL | $100K–$500K | 5K | $98.00 | Nov 7, 2024 |
| Peterson Neil | CHIEF OPERATING OF… | EXERCISE | $100K–$500K | 5K | $54.40 | Nov 7, 2024 |
| Parra Raul Jr. | CFO AND TREASURER | EXERCISE | $1M+ | 34K | $54.44 | Nov 7, 2024 |
| Parra Raul Jr. | CFO AND TREASURER | SELL | $1M+ | 30K | $98.02 | Nov 7, 2024 |
| Millner F. Ann | Director | SELL | $1M+ | 13K | $85.00 | Jul 2, 2024 |
| Millner F. Ann | Director | EXERCISE | $500K+ | 13K | $50.50 | Jul 2, 2024 |
| Peterson Neil | CHIEF OPERATING OF… | EXERCISE | $100K–$500K | 8K | $44.80 | Jun 12, 2024 |
| Peterson Neil | CHIEF OPERATING OF… | SELL | $500K+ | 8K | $81.85 | Jun 12, 2024 |
| Millner F. Ann | Director | EXERCISE | $500K+ | 20K | $34.40 | Jan 24, 2024 |
| Millner F. Ann | Director | SELL | $1M+ | 20K | $80.00 | Jan 24, 2024 |
| Peterson Neil | CHIEF OPERATING OF… | SELL | $500K+ | 8K | $67.91 | Aug 23, 2023 |
| Peterson Neil | CHIEF OPERATING OF… | EXERCISE | $100K–$500K | 8K | $28.20 | Aug 23, 2023 |
| ANDERSON A SCOTT | Director | EXERCISE | $1M+ | 25K | $50.50 | Aug 11, 2023 |
| ANDERSON A SCOTT | Director | SELL | $1M+ | 22K | $69.40 | Aug 11, 2023 |
| Peterson Neil | CHIEF OPERATING OF… | SELL | $500K+ | 8K | $68.75 | Mar 20, 2023 |
| Peterson Neil | CHIEF OPERATING OF… | EXERCISE | $100K–$500K | 8K | $28.20 | Mar 20, 2023 |
| LAMPROPOULOS FRED P | PRESIDENT AND CEO | SELL | $1M+ | 25K | $68.26 | Mar 16, 2023 |
| Voigt Michel James | CHIEF HUMAN RESOUR… | SELL | $100K–$500K | 2K | $68.31 | Mar 15, 2023 |
| Ward Lynne | Director | SELL | $500K+ | 12K | $66.71 | Mar 10, 2023 |
| Ward Lynne | Director | EXERCISE | $50K–$100K | 2K | $34.46 | Mar 10, 2023 |
| ANDERSON A SCOTT | Director | SELL | $1M+ | 15K | $66.74 | Mar 8, 2023 |
| ANDERSON A SCOTT | Director | EXERCISE | $100K–$500K | 15K | $29.20 | Mar 8, 2023 |
| Parra Raul Jr. | CFO AND TREASURER | SELL | $50K–$100K | 1K | $70.00 | Mar 7, 2023 |
| Parra Raul Jr. | CFO AND TREASURER | EXERCISE | $100K–$500K | 6K | $37.71 | Mar 3, 2023 |
| Parra Raul Jr. | CFO AND TREASURER | SELL | $500K+ | 12K | $70.00 | Mar 3, 2023 |
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Institutional Ownership
13F filings as of Dec 31, 2025 · 323 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| STATE STREET CORP | 2.2M | $1M+ | SH |
| Conestoga Capital Advisors, LLC | 2.1M | $1M+ | SH |
| FULLER & THALER ASSET MANAGEMENT, INC. | 2.1M | $1M+ | SH |
| FULLER & THALER ASSET MANAGEMENT, INC. | 2.1M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 1.3M | $1M+ | SH |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 1.1M | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 1.1M | $1M+ | SH |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 875K | $1M+ | SH |
| NORGES BANK | 862K | $1M+ | SH |
| CONGRESS ASSET MANAGEMENT CO | 858K | $1M+ | SH |
| WESTWOOD HOLDINGS GROUP INC | 826K | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 672K | $1M+ | SH |
| Walleye Capital LLC | 560K | $1M+ | SH |
| MAVERICK CAPITAL LTD | 486K | $1M+ | SH |
| ArrowMark Colorado Holdings LLC | 457K | $1M+ | SH |
| Point72 Asset Management, L.P. | 437K | $1M+ | SH |
| NOMURA HOLDINGS INC | 415K | $1M+ | SH |
| Champlain Investment Partners, LLC | 367K | $1M+ | SH |
| PUBLIC SECTOR PENSION INVESTMENT BOARD | 325K | $1M+ | SH |
| FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ | 321K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Oct 17, 2025
14.1%
8.4M shares
William Blair Investment Management, LLC
SC 13G/A · Nov 14, 2024
2.5%
1.4M shares
SC 13G/A · Nov 8, 2024
15.4%
9.0M shares
SC 13G/A · Oct 18, 2024
15.4%
9.0M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
11.9%
6.9M shares
William Blair Investment Management, LLC
SC 13G/A · Feb 12, 2024
6.6%
3.8M shares
SC 13G/A · Jan 22, 2024
17.4%
10.1M shares
ArrowMark Colorado Holdings, LLC
SC 13G/A · Feb 14, 2023
4.4%
2.5M shares
William Blair Investment Management, LLC
SC 13G/A · Feb 9, 2023
6.6%
3.7M shares
SC 13G/A · Jan 26, 2023
17.0%
9.7M shares
SC 13G/A · Jan 20, 2023
17.0%
9.7M shares
ArrowMark Colorado Holdings, LLC
SC 13G/A · Feb 14, 2022
5.5%
3.1M shares
SC 13G/A · Jan 27, 2022
14.8%
8.3M shares
SC 13G/A · Jan 25, 2022
14.8%
8.3M shares