The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This stock page is the Follow view. The Build view lets your agent query MLR owners, fund changes, insider filings, and source links through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/MLR"
Use Arkolith to show who owns MLR, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | $60.5M | 1.3M | ▲+1.7% Added · +22K sh | Q1 2026 | |
| 2 | Neuberger Berman Group LLC | $49.8M | 1.1M | ▲+1.5% Added · +16K sh | Q1 2026 | |
| 3 | BlackRock, Inc. | $36.8M | 808K | ▼−8.2% Reduced · −72K sh | Q1 2026 | |
| 4 | DIMENSIONAL FUND ADVISORS LP | $31.4M | 689K | ▼−1.3% Reduced · −9K sh | Q1 2026 | |
| 5 | VANGUARD GROUP INC | $24.0M | 643K | ▼−2.0% Reduced · −13K sh | Q4 2025 | |
| 6 | HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | $23.7M | 521K | ▼−5.7% Reduced · −31K sh | Q1 2026 | |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | $22.6M | 496K | ▲New +496K sh | Q1 2026 | |
| 8 | SYSTEMATIC FINANCIAL MANAGEMENT LP | $20.3M | 446K | ▲+1.3% Added · +6K sh | Q1 2026 | |
| 9 | GOLDMAN SACHS GROUP INC | $14.3M | 314K | ▲+4.9% Added · +15K sh | Q1 2026 | |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | $12.5M | 275K | ▲+2.5% Added · +7K sh | Q1 2026 | |
| 11 | STATE STREET CORP | $10.5M | 231K | ▼−0.8% Reduced · −2K sh | Q1 2026 | |
| 12 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $9.1M | 200K | ▼−2.5% Reduced · −5K sh | Q1 2026 | |
| 13 | MORGAN STANLEY | $8.6M | 188K | ▼−20% Reduced · −48K sh | Q1 2026 | |
| 14 | HEARTLAND ADVISORS INC | $5.5M | 120K | ▲New +120K sh | Q1 2026 | |
| 15 | Bank of New York Mellon Corp | $5.3M | 116K | ▲+3.9% Added · +4K sh | Q1 2026 | |
| 16 | Invenomic Capital Management LP | $5.2M | 115K | ▲+3.8% Added · +4K sh | Q1 2026 | |
| 17 | PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. | $5.0M | 110K | ▲+36% Added · +29K sh | Q1 2026 | |
| 18 | NORTHERN TRUST CORP | $4.2M | 93K | ▲+5.3% Added · +5K sh | Q1 2026 | |
| 19 | Allspring Global Investments Holdings, LLC | $4.2M | 92K | ▲+17% Added · +14K sh | Q1 2026 | |
| 20 | Qube Research & Technologies Ltd | $4.0M | 87K | ▼−27% Reduced · −32K sh | Q1 2026 | |
| 21 | TWO SIGMA INVESTMENTS, LP | $3.9M | 85K | ▲+132% Added · +48K sh | Q1 2026 | |
| 22 | VANGUARD PORTFOLIO MANAGEMENT LLC | $3.5M | 77K | ▲New +77K sh | Q1 2026 | |
| 23 | CITADEL ADVISORS LLC | $3.5M | 76K | ▼−6.6% Reduced · −5K sh | Q1 2026 | |
| 24 | AMERICAN CENTURY COMPANIES INC | $3.4M | 75K | ▲+71% Added · +31K sh | Q1 2026 | |
| 25 | VANGUARD FIDUCIARY TRUST CO | $3.4M | 74K | ▲New +74K 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 |
|---|---|---|---|---|---|
| Mar 15, 2026 | WHITMIRE DEBORAH L | Chief Financial Officer | Tax withholding (F) | 2K | $89K |
| Mar 15, 2026 | WHITMIRE DEBORAH L | Chief Financial Officer | Option exercise (M) | 6K | — |
| Mar 15, 2026 | Tiano Vincent J. | Chief Revenue Officer | Grant (A) | 6K | $0 |
| Mar 15, 2026 | Tiano Vincent J. | Chief Revenue Officer | Option exercise (M) | 3K | $0 |
| Mar 15, 2026 | Tiano Vincent J. | Chief Revenue Officer | Tax withholding (F) | 778 | $34K |
| Mar 15, 2026 | Tiano Vincent J. | Chief Revenue Officer | Option exercise (M) | 3K | — |
| Mar 15, 2026 | Reyneke Josias W. | Chief Information Officer | Grant (A) | 6K | $0 |
| Mar 15, 2026 | Reyneke Josias W. | Chief Information Officer | Option exercise (M) | 3K | $0 |
| Mar 15, 2026 | Miller William G. II | CEO and President, Director | Option exercise (M) | 19K | $0 |
| Mar 15, 2026 | Reyneke Josias W. | Chief Information Officer | Option exercise (M) | 3K | — |
| Mar 15, 2026 | Reyneke Josias W. | Chief Information Officer | Tax withholding (F) | 778 | $34K |
| Mar 15, 2026 | Miller William G. II | CEO and President, Director | Grant (A) | 30K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 40 funds | $13.9B |
| ELEVANCE HEALTH INCELV | 38 funds | $1.5B |
| ALPHABET INC-CL AGOOGL | 37 funds | $9.3B |
| JPMORGAN CHASE & COJPM | 37 funds | $5.3B |
| GENERAL MOTORS COGM | 37 funds | $1.4B |
| AMAZON.COM INCAMZN | 36 funds | $11.4B |
| CHEVRON CORPCVX | 36 funds | $2.2B |
| UNITEDHEALTH GROUP INCUNH | 36 funds | $1.9B |
| BANK OF AMERICA CORPBAC | 36 funds | $1.8B |
| COMCAST CORP-CLASS ACMCSA | 36 funds | $1.3B |
| LAM RESEARCH CORPLRCX | 36 funds | $1.2B |
| FIDELITY NATIONAL INFO SERVFIS | 36 funds | $584.9M |
Ranked by how many of MLR'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 MLR. 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.