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 MAMO 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/MAMO"
Use Arkolith to show who owns MAMO, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | $254K | 64K | ▲New +64K sh | Q4 2025 | |
| 2 | GEODE CAPITAL MANAGEMENT, LLC | $122K | 122K | ▲+62% Added · +47K sh | Q1 2026 | |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | $42K | 43K | ▲New +43K sh | Q1 2026 | |
| 4 | VANGUARD FIDUCIARY TRUST CO | $21K | 21K | ▲New +21K sh | Q1 2026 | |
| 5 | UBS Group AG | $15K | 15K | ▼−14% Reduced · −3K sh | Q1 2026 | |
| 6 | BlackRock, Inc. | $14K | 14K | ▲+8.7% Added · +1K sh | Q1 2026 | |
| 7 | XTX Topco Ltd | $13K | 13K | ▲New +13K sh | Q1 2026 | |
| 8 | RENAISSANCE TECHNOLOGIES LLC | $13K | 13K | ▲New +13K sh | Q1 2026 | |
| 9 | NORTHERN TRUST CORP | $10K | 10K | —Held | Q1 2026 | |
| 10 | Tower Research Capital LLC (TRC) | $9K | 9K | ▲New +9K sh | Q1 2026 | |
| 11 | Advisory Services Network, LLC | $91 | 91 | ▲New +91 sh | Q1 2026 | |
| 12 | SBI Securities Co., Ltd. | $6 | 6 | —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 |
|---|---|---|---|---|---|
| May 29, 2025 | Zhu Ting | Director | Grant (A) | 2K | $0 |
| May 29, 2025 | Shan David | Chief Executive Officer, Director, 10% Owner | Grant (A) | 38K | $0 |
| May 29, 2025 | Smith Michael Glenn | Insider | Grant (A) | 25K | $0 |
| May 29, 2025 | Sheffield Mark | Director | Grant (A) | 2K | $0 |
| May 29, 2025 | Chen Yunhao | Chief Financial Officer | Grant (A) | 25K | $0 |
| May 29, 2025 | Pietrogrande Paolo | Director | Grant (A) | 2K | $0 |
| Mar 20, 2025 | Zhu Ting | Director | Grant (A) | 2K | $0 |
| Mar 20, 2025 | Sheffield Mark | Director | Grant (A) | 2K | $0 |
| Mar 20, 2025 | Pietrogrande Paolo | Director | Grant (A) | 2K | $0 |
| Jan 2, 2025 | Sheffield Mark | Director | Buy (P) | 50 | — |
| Dec 2, 2024 | Chen Yunhao | Chief Financial Officer | Grant (A) | 28K | $0 |
| Nov 22, 2024 | Shan David | Chief Executive Officer, Director, 10% Owner | Grant (A) | 38K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 1 funds | $429.4M |
| VANGUARD S&P 500 ETFVOO | 1 funds | $217.3M |
| VANGUARD TOTAL STOCK MKT ETFVTI | 1 funds | $186.4M |
| APPLE INCAAPL | 1 funds | $119.3M |
| INVESCO QQQ TRUST SERIES 1QQQ | 1 funds | $110.6M |
| VANGUARD TOT WORLD STK ETFVT | 1 funds | $109.5M |
| TESLA INCTSLA | 1 funds | $97.5M |
| ALPHABET INC-CL AGOOGL | 1 funds | $89.6M |
| VANGUARD HIGH DVD YIELD ETFVYM | 1 funds | $86.8M |
| AMAZON.COM INCAMZN | 1 funds | $81.6M |
| PALANTIR TECHNOLOGIES INC-APLTR | 1 funds | $77.4M |
| MICROSOFT CORPMSFT | 1 funds | $75.6M |
Ranked by how many of MAMO'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 MAMO. 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.