MERIT MED SYS INC MMSI
COM · Common Stock · CUSIP 589889104
Company in South Jordan, United States
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($1.4m this quarter). Holder counts are more reliable. Shares outstanding: 59.2m as of 2025-07-28, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $93.50. Options: 8 managers hold calls ($85.5m notional), 5 hold puts ($3.8m).
Trends to Q2 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 242 |
| Q4 2022 | 279 |
| Q1 2023 | 287 |
| Q2 2023 | 313 |
| Q3 2023 | 274 |
| Q4 2023 | 290 |
| Q1 2024 | 305 |
| Q2 2024 | 320 |
| Q3 2024 | 378 |
| Q4 2024 | 386 |
| Q1 2025 | 381 |
| Q2 2025 | 381 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2023 | 126 | 181 |
| Q4 2023 | 143 | 116 |
| Q1 2024 | 159 | 140 |
| Q2 2024 | 175 | 131 |
| Q3 2024 | 208 | 135 |
| Q4 2024 | 206 | 164 |
| Q1 2025 | 190 | 182 |
| Q2 2025 | 187 | 185 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $89.1m | $711.6k | 0.01 |
| Q4 2024 | $93.9m | $48.4k | 0.00 |
| Q1 2025 | $92.8m | $2.1m | 0.02 |
| Q2 2025 | $85.5m | $3.8m | 0.04 |
Biggest buyers
| ROYAL BANK OF CANADA | Added | +1.2m |
| CITADEL ADVISORS LLC | Added | +398.0k |
| MILLENNIUM MANAGEMENT LLC | Added | +259.7k |
| VANGUARD GROUP INC | Added | +257.6k |
| TWO SIGMA ADVISERS, LP | Added | +234.9k |
| FRANKLIN RESOURCES INC | Added | +181.8k |
| Greenhouse Funds LLLP | Added | +180.1k |
| Iron Triangle Partners LP | Added | +163.0k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | Added | +138.0k |
| TWO SIGMA INVESTMENTS, LP | Added | +126.6k |
Biggest sellers
| BlackRock, Inc. | Reduced | -460.5k |
| ArrowMark Colorado Holdings LLC | Reduced | -341.2k |
| UBS Group AG | Reduced | -332.4k |
| Nuveen, LLC | Reduced | -328.6k |
| LOOMIS SAYLES & CO L P | Reduced | -248.9k |
| Driehaus Capital Management LLC | Sold out | -227.8k |
| Invesco Ltd. | Reduced | -205.3k |
| Squarepoint Ops LLC | Reduced | -203.6k |
| VOYA INVESTMENT MANAGEMENT LLC | Reduced | -171.2k |
| NOMURA HOLDINGS INC | Reduced | -164.9k |
Biggest calls
| UBS Group AG | Unchanged | $80.5m860.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $2.2m23.6k shares |
| CITADEL ADVISORS LLC | Added | $972.2k10.4k shares |
| GARDA CAPITAL PARTNERS LP | Unchanged | $794.6k8.5k shares |
| Walleye Trading LLC | New | $448.7k4.8k shares |
| SIMPLEX TRADING, LLC | New | $420.0k4.5k shares |
| GROUP ONE TRADING LLC | New | $187.0k2.0k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $2.1m22.4k shares |
| GARDA CAPITAL PARTNERS LP | Unchanged | $794.6k8.5k shares |
| Portman Square Capital LLP | Reduced | $663.7k7.1k shares |
| SIMPLEX TRADING, LLC | Added | $224.0k2.4k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution filed 2025-10-17 | 14.1% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 6.0% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-30 | 5.2% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC)
Insider purchases and sales in Q2 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q3 2023 | 0 | — | 2 | $2.1m | — |
| Q4 2023 | 0 | — | 0 | — | — |
| Q1 2024 | 0 | — | 5 | $5.4m | $1.6m |
| Q2 2024 | 0 | — | 2 | $1.7m | $613.9k |
| Q3 2024 | 0 | — | 0 | — | — |
| Q4 2024 | 0 | — | 3 | $5.2m | $1.3m |
| Q1 2025 | 0 | — | 6 | $13.4m | $1.8m |
| Q2 2025 | 0 | — | 6 | $8.5m | $2.9m |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2025-06-13 | Parra Raul Jr. CFO AND TREASURER | Sold | $1.4m15.2k shares |
| 2025-06-10 | Lampropoulos Fred P. President and CEO, director | Sold | $38.2k400 shares |
| 2025-06-05 | Lampropoulos Fred P. President and CEO, director | Sold | $951.9k10.0k shares |
| 2025-06-02 | McDonnell Michael R. Director | Sold plan | $165.4k1.8k shares |
| 2025-05-30 | Lampropoulos Fred P. President and CEO, director | Sold | $951.2k10.0k shares |
| 2025-05-30 | Floyd David Director · David K. Floyd Living Trust | Sold | $331.0k3.5k shares |
| 2025-05-30 | McDonnell Michael R. Director | Sold plan | $165.0k1.8k shares |
| 2025-05-27 | LAMPROPOULOS FRED P President and CEO, director | Sold | $1.9m20.0k shares |
| 2025-05-15 | Millner F. Ann Director | Sold plan | $2.0m21.2k shares |
| 2025-04-01 | Peterson Neil CHIEF OPERATING OFFICER | Sold plan | $522.6k5.0k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.02% of their portfolio | 8.7m $814.7m | Reduced -460.5k |
| VANGUARD GROUP INC 0.01% of their portfolio | 6.8m $638.4m | Added +257.6k |
| FMR LLC 0.01% of their portfolio | 2.5m $237.6m | Reduced -28.0k |
| STATE STREET CORP 0.01% of their portfolio | 2.2m $207.4m | Added +24.6k |
| Conestoga Capital Advisors, LLC 3.05% of their portfolio | 2.2m $206.7m | Reduced -53.6k |
| ROYAL BANK OF CANADA 0.02% of their portfolio | 2.1m $198.8m | Added +1.2m |
| FULLER & THALER ASSET MANAGEMENT, INC. 0.62% of their portfolio | 1.8m $170.1m | Added +52.7k |
| Invesco Ltd. 0.03% of their portfolio | 1.6m $147.9m | Reduced -205.3k |
| MACQUARIE GROUP LTD 0.17% of their portfolio | 1.5m $136.1m | Added +4.2k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 1.4m $134.4m | Added +39.6k |
| MAVERICK CAPITAL LTD 1.98% of their portfolio | 1.4m $128.9m | Added +106.9k |
| CITADEL ADVISORS LLC 0.11% of their portfolio | 1.3m $126.1m | Added +398.0k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 1.1m $103.7m | Reduced -41.2k |
| MORGAN STANLEY 0.01% of their portfolio | 1.0m $93.7m | Reduced -17.3k |
| FRANKLIN RESOURCES INC 0.02% of their portfolio | 884.6k $82.7m | Added +181.8k |
| JPMORGAN CHASE & CO 0.01% of their portfolio | 852.2k $79.7m | Reduced -40.3k |
| LOOMIS SAYLES & CO L P 0.09% of their portfolio | 793.7k $74.2m | Reduced -248.9k |
| WESTWOOD HOLDINGS GROUP INC 0.52% of their portfolio | 769.0k $71.9m | Added +81.5k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 756.9k $70.8m | Added +37.6k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.18% of their portfolio | 739.6k $69.1m | Added +138.0k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 732.3k $68.5m | Reduced -19.7k |
| TWO SIGMA ADVISERS, LP 0.14% of their portfolio | 728.3k $68.1m | Added +234.9k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 720.3k $67.3m | Reduced -8.2k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 697.6k $65.2m | Reduced -40.0k |
| TWO SIGMA INVESTMENTS, LP 0.11% of their portfolio | 673.2k $62.9m | Added +126.6k |
| ArrowMark Colorado Holdings LLC 1.09% of their portfolio | 650.1k $60.8m | Reduced -341.2k |
| CONGRESS ASSET MANAGEMENT CO 0.41% of their portfolio | 635.1k $59.4m | Added +7.0k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 618.2k $57.8m | Reduced -105.6k |
| Greenhouse Funds LLLP 2.30% of their portfolio | 587.9k $55.0m | Added +180.1k |
| NORGES BANK 0.01% of their portfolio | 574.4k $53.7m | Reduced -5.3k |
| Aberdeen Group plc 0.09% of their portfolio | 572.2k $53.5m | Reduced -30.0k |
| RAYMOND JAMES FINANCIAL INC 0.02% of their portfolio | 559.1k $52.3m | Added +45.2k |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 546.2k $51.1m | Reduced -114.2k |
| Rockefeller Capital Management L.P. 0.06% of their portfolio | 526.5k $49.2m | Added +24.0k |
| Nuveen, LLC 0.01% of their portfolio | 434.6k $40.6m | Reduced -328.6k |
| Bank of New York Mellon Corp 0.01% of their portfolio | 428.1k $40.0m | Added +2.3k |
| Aristotle Capital Boston, LLC 2.02% of their portfolio | 423.7k $39.6m | Reduced -32.2k |
| UBS Group AG 0.01% of their portfolio | 420.2k $39.3m | Reduced -332.4k |
| GROUPAMA ASSET MANAGMENT 0.01% of their portfolio | 400.0k $505.6k | Unchanged |
| Iron Triangle Partners LP 5.81% of their portfolio | 392.8k $36.7m | Added +163.0k |
| WELLS FARGO & COMPANY/MN 0.01% of their portfolio | 392.2k $36.7m | Added +56.3k |
| Polar Capital Holdings Plc 0.19% of their portfolio | 383.3k $35.8m | Added +575 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.03% of their portfolio | 326.2k $30.5m | Added +63.7k |
| PRINCIPAL FINANCIAL GROUP INC 0.02% of their portfolio | 325.4k $30.4m | Added +5.5k |
| VOYA INVESTMENT MANAGEMENT LLC 0.03% of their portfolio | 310.1k $29.0m | Reduced -171.2k |
| MILLENNIUM MANAGEMENT LLC 0.03% of their portfolio | 305.8k $28.6m | Added +259.7k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio | 303.0k $28.3m | Added +16.0k |
| D. E. Shaw & Co., Inc. 0.03% of their portfolio | 294.3k $27.5m | Reduced -13.0k |
| EMERALD ADVISERS, LLC 1.00% of their portfolio | 291.8k $27.3m | Added +11.1k |
| Tidal Investments LLC 0.17% of their portfolio | 272.0k $25.4m | Reduced -6.7k |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 259.7k $24.3m | Reduced -398 |
| ENVESTNET ASSET MANAGEMENT INC 0.01% of their portfolio | 244.2k $22.8m | Added +12.3k |
| COMERICA BANK 0.08% of their portfolio | 227.0k $21.2m | Added +155 |
| Handelsbanken Fonder AB 0.08% of their portfolio | 226.3k $21.2m | Reduced -900 |
| Fisher Asset Management, LLC 0.01% of their portfolio | 215.4k $20.1m | Reduced -6.9k |
| Thrivent Financial for Lutherans 0.04% of their portfolio | 214.0k $20.0m | Added +50.4k |
| OBERWEIS ASSET MANAGEMENT INC/ 0.87% of their portfolio | 212.8k $19.9m | Added +4.2k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.18% of their portfolio | 210.9k $19.7m | Reduced -18.2k |
| Ranger Investment Management, L.P. 1.37% of their portfolio | 210.3k $19.7m | Added +46.1k |
| Public Sector Pension Investment Board 0.08% of their portfolio | 201.5k $18.8m | Added +16.6k |
| Legal & General Group Plc 0.00% of their portfolio | 188.8k $17.6m | Added +3.7k |
| FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ 0.10% of their portfolio | 177.8k $16.6m | Reduced -16.5k |
| EMERALD MUTUAL FUND ADVISERS TRUST 1.00% of their portfolio | 175.7k $16.4m | Reduced -13.0k |
| RENAISSANCE TECHNOLOGIES LLC 0.02% of their portfolio | 170.9k $16.0m | Added +4.3k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 167.6k $15.7m | Added +11.1k |
| SEI INVESTMENTS CO 0.02% of their portfolio | 165.7k $15.5m | Reduced -8.7k |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.02% of their portfolio | 152.7k $14.3m | Added +52.7k |
| AXIOM INVESTORS LLC /DE 0.11% of their portfolio | 149.7k $14.0m | Reduced -137.7k |
| California Public Employees Retirement System 0.01% of their portfolio | 148.6k $13.9m | Added +755 |
| Curi Capital, LLC 0.26% of their portfolio | 148.5k $13.9m | Added +27.5k |
| NOMURA HOLDINGS INC 0.10% of their portfolio | 138.2k $12.9m | Reduced -164.9k |
| VICTORY CAPITAL MANAGEMENT INC 0.01% of their portfolio | 121.4k $11.4m | Added +13.1k |
| Capital World Investors 0.00% of their portfolio | 120.0k $11.2m | Added +66.4k |
| Qube Research & Technologies Ltd 0.02% of their portfolio | 117.3k $11.0m | Added +93.1k |
| EULAV Asset Management 0.26% of their portfolio | 117.0k $10.9m | Unchanged |
| Amundi 0.00% of their portfolio | 114.2k $10.7m | Reduced -18.6k |
| BARCLAYS PLC 0.00% of their portfolio | 114.0k $10.7m | Reduced -15.8k |
| Swiss National Bank 0.01% of their portfolio | 112.9k $10.6m | Unchanged |
| GREAT LAKES ADVISORS, LLC 0.09% of their portfolio | 112.5k $10.5m | Reduced -14.1k |
| JANE STREET GROUP, LLC 0.02% of their portfolio | 111.2k $10.4m | Added +91.4k |
| TRILLIUM ASSET MANAGEMENT, LLC 0.27% of their portfolio | 106.5k $10.0m | Reduced -5.2k |
| PANAGORA ASSET MANAGEMENT INC 0.04% of their portfolio | 100.2k $9.4m | Added +1.3k |
| Impax Asset Management Group plc 0.05% of their portfolio | 100.0k $9.3m | Unchanged |
| MOUNTAIN PACIFIC INVESTMENT ADVISERS LLC 0.64% of their portfolio | 94.0k $8.8m | Added +23.9k |
| CW Advisors, LLC 0.08% of their portfolio | 90.2k $8.4m | Reduced -1.6k |
| Wilmington Savings Fund Society, FSB 0.15% of their portfolio | 87.9k $8.2m | Reduced -4.4k |
| AMERICAN CAPITAL MANAGEMENT INC 0.34% of their portfolio | 87.1k $8.1m | Added +2.0k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.02% of their portfolio | 80.8k $7.6m | Reduced -1.9k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 80.6k $7.5m | Added +12.6k |
| Susquehanna Portfolio Strategies, LLC 0.16% of their portfolio | 78.2k $7.3m | New |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 74.5k $7.0m | Added +3.9k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 73.7k $6.9m | Reduced -5.5k |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 72.8k $6.8m | Unchanged |
| F/m Investments LLC 0.25% of their portfolio | 72.5k $6.8m | Added +462 |
| Walleye Capital LLC 0.06% of their portfolio | 71.6k $6.7m | Added +5.7k |
| Capitolis Liquid Global Markets LLC 0.05% of their portfolio | 70.0k $6.5m | New |
| NATIXIS ADVISORS, LLC 0.01% of their portfolio | 67.7k $6.3m | Reduced -7.1k |
| RENAISSANCE GROUP LLC 0.24% of their portfolio | 66.3k $6.2m | Added +15.2k |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.02% of their portfolio | 66.1k $6.2m | Added +4.0k |
| KING LUTHER CAPITAL MANAGEMENT CORP 0.03% of their portfolio | 65.5k $6.1m | Reduced -1.2k |