This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/MMSI/capital-change-brief"
Use Arkolith's capital_change_brief for MMSI. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $608.9M | 8.8M | ▲+1.5% Added · +131K sh | Q1 2026 | |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | $242.8M | 3.5M | ▲New +3.5M sh | Q1 2026 | |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | $183.1M | 2.7M | ▲New +2.7M sh | Q1 2026 | |
| 4 | STATE STREET CORP | $162.7M | 2.4M | ▲+5.8% Added · +130K sh | Q1 2026 | |
| 5 | Conestoga Capital Advisors, LLC | $149.4M | 2.2M | ▲+3.9% Added · +81K sh | Q1 2026 | |
| 6 | FULLER & THALER ASSET MANAGEMENT, INC. | $145.8M | 2.1M | ▲+1.8% Added · +38K sh | Q1 2026 | |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | $104.0M | 1.5M | ▲+3.8% Added · +55K sh | Q1 2026 | |
| 8 | MORGAN STANLEY | $86.9M | 1.3M | ▲+11% Added · +121K sh | Q1 2026 | |
| 9 | DIMENSIONAL FUND ADVISORS LP | $85.3M | 1.2M | ▲+1.0% Added · +12K sh | Q1 2026 | |
| 10 | Greenhouse Funds LLLP | $77.4M | 1.1M | ▲+29% Added · +255K sh | Q1 2026 | |
| 11 | CITIGROUP INC | $73.3M | 1.1M | ▲+0.3% Added · +4K sh | Q1 2026 | |
| 12 | CONGRESS ASSET MANAGEMENT CO | $70.9M | 1.0M | ▲+20% Added · +172K sh | Q1 2026 | |
| 13 | FMR LLC | $69.3M | 1.0M | ▼−43% Reduced · −767K sh | Q1 2026 | |
| 14 | CITADEL ADVISORS LLC | $66.4M | 963K | ▼−12% Reduced · −131K sh | Q1 2026 | |
| 15 | WESTWOOD HOLDINGS GROUP INC | $65.2M | 946K | ▲+15% Added · +120K sh | Q1 2026 | |
| 16 | ROYAL BANK OF CANADA | $63.5M | 921K | ▼−4.7% Reduced · −45K sh | Q1 2026 | |
| 17 | NORGES BANK | $76.0M | 862K | ▲+50% Added · +287K sh | Q4 2025 | |
| 18 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | $53.6M | 777K | ▼−11% Reduced · −97K sh | Q1 2026 | |
| 19 | Point72 Asset Management, L.P. | $51.1M | 742K | ▲+70% Added · +305K sh | Q1 2026 | |
| 20 | MAVERICK CAPITAL LTD | $49.2M | 714K | ▲+47% Added · +228K sh | Q1 2026 | |
| 21 | NORTHERN TRUST CORP | $47.0M | 682K | ▲+0.2% Added · +2K sh | Q1 2026 | |
| 22 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $46.6M | 675K | ▲+0.5% Added · +3K sh | Q1 2026 | |
| 23 | PRICE T ROWE ASSOCIATES INC /MD/ | $45.1M | 655K | ▲+1.6% Added · +10K sh | Q1 2026 | |
| 24 | GOLDMAN SACHS GROUP INC | $44.7M | 648K | ▼−32% Reduced · −300K sh | Q1 2026 | |
| 25 | JPMORGAN CHASE & CO | $42.4M | 617K | ▼−20% Reduced · −153K sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 15, 2026 | Voigt Michel J. | CHIEF HUMAN RESOURCES OFFICER | Gift (G) | 65 | $0 |
| Jun 5, 2026 | Lloyd Brian G. | CHIEF LEGAL OFFICER, SECRETARY | Gift (G) | 2K | $0 |
| May 20, 2026 | Gunderson Thomas J. | Director | Option exercise (M) | 8K | $0 |
| May 20, 2026 | Gunderson Thomas J. | Director | Option exercise (M) | 14K | $0 |
| May 20, 2026 | Gunderson Thomas J. | Director | Option exercise (M) | 8K | $391K |
| May 20, 2026 | Gunderson Thomas J. | Director | Option exercise (M) | 14K | $717K |
| May 18, 2026 | Ward Scott R. | Director | Grant (A) | 3K | $0 |
| May 18, 2026 | McDonnell Michael R. | Director | Grant (A) | 3K | $0 |
| May 18, 2026 | Kaiser Laura S. | Director | Grant (A) | 3K | $0 |
| May 18, 2026 | Perez Silvia M. | Director | Grant (A) | 3K | $0 |
| May 18, 2026 | Ward Lynne N. | Director | Grant (A) | 3K | $0 |
| May 18, 2026 | Millner F. Ann Ed.D. | Director | Grant (A) | 3K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 139 funds | $55.0B |
| APPLE INCAAPL | 136 funds | $64.1B |
| COSTCO WHOLESALE CORPCOST | 136 funds | $10.0B |
| NVIDIA CORPNVDA | 135 funds | $77.8B |
| AMAZON.COM INCAMZN | 135 funds | $44.0B |
| ALPHABET INC-CL AGOOGL | 134 funds | $35.0B |
| ELI LILLY & COLLY | 133 funds | $14.6B |
| VISA INC-CLASS A SHARESV | 133 funds | $11.5B |
| BROADCOM INCAVGO | 132 funds | $27.8B |
| MASTERCARD INC - AMA | 132 funds | $10.3B |
| BOSTON SCIENTIFIC CORPBSX | 132 funds | $3.7B |
| ALPHABET INC-CL CGOOG | 131 funds | $24.3B |
Ranked by how many of MMSI's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for MMSI. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.