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 MBUU 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/MBUU"
Use Arkolith to show who owns MBUU, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | PZENA INVESTMENT MANAGEMENT LLC | $44.0M | 1.7M | ▼−1.4% Reduced · −25K sh | Q1 2026 | |
| 2 | COOKE & BIELER LP | $38.6M | 1.5M | ▼−5.0% Reduced · −79K sh | Q1 2026 | |
| 3 | BlackRock, Inc. | $37.5M | 1.4M | ▲+0.1% Added · +845 sh | Q1 2026 | |
| 4 | VANGUARD GROUP INC | $31.9M | 1.1M | ▼−2.0% Reduced · −23K sh | Q4 2025 | |
| 5 | DIMENSIONAL FUND ADVISORS LP | $25.1M | 967K | ▲+5.8% Added · +53K sh | Q1 2026 | |
| 6 | Lodge Hill Capital, LLC | $23.5M | 905K | —Held | Q1 2026 | |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | $20.7M | 798K | ▲New +798K sh | Q1 2026 | |
| 8 | FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ | $18.0M | 695K | ▲+4.4% Added · +29K sh | Q1 2026 | |
| 9 | AMERICAN CENTURY COMPANIES INC | $15.1M | 582K | ▲+11% Added · +58K sh | Q1 2026 | |
| 10 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | $12.3M | 476K | ▲New +476K sh | Q1 2026 | |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | $11.7M | 453K | ▲~0% Added · +104 sh | Q1 2026 | |
| 12 | STATE STREET CORP | $11.5M | 444K | ▼−0.3% Reduced · −1K sh | Q1 2026 | |
| 13 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $10.4M | 402K | ▼−6.5% Reduced · −28K sh | Q1 2026 | |
| 14 | JANUS HENDERSON GROUP PLC | $10.2M | 392K | ▼−11% Reduced · −46K sh | Q1 2026 | |
| 15 | BANK OF AMERICA CORP /DE/ | $8.9M | 343K | ▲+45% Added · +106K sh | Q1 2026 | |
| 16 | Parallel Advisors, LLC | $7.5M | 7.5M | ▲New +7.5M sh | Q1 2026 | |
| 17 | MORGAN STANLEY | $7.4M | 284K | ▼−17% Reduced · −57K sh | Q1 2026 | |
| 18 | Grantham, Mayo, Van Otterloo & Co. LLC | $7.0M | 271K | ▼−3.1% Reduced · −9K sh | Q1 2026 | |
| 19 | Atom Investors LP | $6.0M | 232K | ▲+25% Added · +46K sh | Q1 2026 | |
| 20 | SCHRODER INVESTMENT MANAGEMENT GROUP | $5.6M | 217K | ▼−18% Reduced · −47K sh | Q1 2026 | |
| 21 | VANGUARD PORTFOLIO MANAGEMENT LLC | $4.8M | 184K | ▲New +184K sh | Q1 2026 | |
| 22 | FMR LLC | $4.6M | 176K | ▲+0.2% Added · +296 sh | Q1 2026 | |
| 23 | NORTHERN TRUST CORP | $4.3M | 166K | ▲+3.2% Added · +5K sh | Q1 2026 | |
| 24 | GOLDMAN SACHS GROUP INC | $3.3M | 129K | ▼−7.9% Reduced · −11K sh | Q1 2026 | |
| 25 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $3.3M | 128K | ▲New +128K 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 |
|---|---|---|---|---|---|
| Jan 2, 2026 | Connolly Michael | Director | Grant (A) | 714 | $20K |
| Jan 2, 2026 | Lanigan Mark W. | Director | Grant (A) | 732 | $21K |
| Nov 26, 2025 | Menneto Steven | Chief Executive Officer, Director | Grant (A) | 33K | $0 |
| Nov 21, 2025 | Black David Scott | Chief Financial Officer | Grant (A) | 8K | $0 |
| Nov 13, 2025 | Black David Scott | Chief Financial Officer | Grant (A) | 4K | $0 |
| Nov 6, 2025 | Beckman Bruce W. | Chief Financial Officer | Tax withholding (F) | 302 | $8K |
| Nov 6, 2025 | Menneto Steven | Chief Executive Officer, Director | Tax withholding (F) | 965 | $27K |
| Oct 24, 2025 | Chhina Ivar S. | Director | Grant (A) | 3K | $0 |
| Oct 24, 2025 | Buch James R. | Director | Grant (A) | 3K | $0 |
| Oct 24, 2025 | Lanigan Mark W. | Director | Grant (A) | 3K | $0 |
| Oct 24, 2025 | Connolly Michael | Director | Grant (A) | 3K | $0 |
| Oct 24, 2025 | Cook Melanie K. | Director | Grant (A) | 3K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 38 funds | $21.9B |
| JPMORGAN CHASE & COJPM | 38 funds | $6.3B |
| ALPHABET INC-CL AGOOGL | 37 funds | $14.3B |
| APPLE INCAAPL | 36 funds | $25.5B |
| AMAZON.COM INCAMZN | 36 funds | $14.9B |
| BROADCOM INCAVGO | 36 funds | $11.6B |
| META PLATFORMS INC-CLASS AMETA | 36 funds | $10.4B |
| ELI LILLY & COLLY | 36 funds | $5.3B |
| MASTERCARD INC - AMA | 36 funds | $4.7B |
| LINDE PLCLIN | 36 funds | $2.2B |
| BANK OF AMERICA CORPBAC | 36 funds | $2.1B |
| WELLS FARGO & COWFC | 36 funds | $2.0B |
Ranked by how many of MBUU'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 MBUU. 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.