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 MBRX 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/MBRX"
Use Arkolith to show who owns MBRX, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | GEODE CAPITAL MANAGEMENT, LLC | $74K | 32K | ▲+114% Added · +17K sh | Q1 2026 | |
| 2 | VANGUARD GROUP INC | $51K | 16K | ▼−94% Reduced · −224K sh | Q4 2025 | |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | $32K | 14K | ▲New +14K sh | Q1 2026 | |
| 4 | VANGUARD FIDUCIARY TRUST CO | $14K | 6K | ▲New +6K sh | Q1 2026 | |
| 5 | Rockefeller Capital Management L.P. | $10K | 4K | ▲20× Added · +4K sh | Q1 2026 | |
| 6 | UBS Group AG | $8K | 3K | ▼−42% Reduced · −2K sh | Q1 2026 | |
| 7 | Tower Research Capital LLC (TRC) | $4K | 2K | ▲+32% Added · +442 sh | Q1 2026 | |
| 8 | BlackRock, Inc. | $1K | 491 | ▼−0.8% Reduced · −4 sh | Q1 2026 | |
| 9 | EFG International AG | $994 | 434 | —Held | Q1 2026 | |
| 10 | SBI Securities Co., Ltd. | $98 | 43 | ▲+48% Added · +14 sh | Q1 2026 | |
| 11 | MORGAN STANLEY | $83 | 36 | —Held | Q1 2026 | |
| 12 | FMR LLC | $7 | 3 | ▲New +3 sh | Q1 2026 | |
| 13 | DANSKE BANK A/S | $5 | 2 | —Held | Q1 2026 | |
| 14 | OSAIC HOLDINGS, INC. | $2 | 1 | —Held | 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 |
|---|---|---|---|---|---|
| Nov 12, 2025 | PICKER DONALD H | CSO | Grant (A) | 200K | — |
| Nov 12, 2025 | Climaco John M | Director | Grant (A) | 150K | — |
| Nov 12, 2025 | CANNON MICHAEL D | Director | Grant (A) | 150K | — |
| Nov 12, 2025 | Cermak Elizabeth | Director | Grant (A) | 150K | — |
| Nov 12, 2025 | Yan Joy | Director | Grant (A) | 150K | — |
| Nov 12, 2025 | KLEMP WALTER V | CEO and President, Director | Grant (A) | 830K | — |
| Nov 12, 2025 | KLEMP WALTER V | CEO and President, Director | Grant (A) | 750K | — |
| Nov 12, 2025 | Foster Jonathan P. | EVP & CFO | Grant (A) | 600K | — |
| Nov 12, 2025 | Foster Jonathan P. | EVP & CFO | Grant (A) | 400K | — |
| Nov 12, 2025 | PICKER DONALD H | CSO | Grant (A) | 200K | — |
| Nov 12, 2025 | George Robert E. | Director | Grant (A) | 150K | — |
| Nov 4, 2025 | Foster Jonathan P. | Chief Financial Officer | Option exercise (M) | 21K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 5 funds | $8.7B |
| APPLE INCAAPL | 5 funds | $6.3B |
| AMAZON.COM INCAMZN | 5 funds | $5.2B |
| MICROSOFT CORPMSFT | 5 funds | $5.2B |
| ALPHABET INC-CL AGOOGL | 5 funds | $3.7B |
| BROADCOM INCAVGO | 5 funds | $3.1B |
| META PLATFORMS INC-CLASS AMETA | 5 funds | $2.8B |
| ALPHABET INC-CL CGOOG | 5 funds | $2.4B |
| JPMORGAN CHASE & COJPM | 5 funds | $2.3B |
| MICRON TECHNOLOGY INCMU | 5 funds | $2.0B |
| TAIWAN SEMICONDUCTOR-SP ADRTSM | 5 funds | $1.9B |
| TESLA INCTSLA | 5 funds | $1.8B |
Ranked by how many of MBRX'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 MBRX. 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.