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 MAMA 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/MAMA"
Use Arkolith to show who owns MAMA, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $33.0M | 2.2M | ▼−0.1% Reduced · −3K sh | Q1 2026 | |
| 2 | WASATCH ADVISORS LP | $31.9M | 2.1M | ▼−25% Reduced · −689K sh | Q1 2026 | |
| 3 | VANGUARD GROUP INC | $28.0M | 2.1M | ▲+9.6% Added · +183K sh | Q4 2025 | |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | $24.5M | 1.6M | ▲New +1.6M sh | Q1 2026 | |
| 5 | JANUS HENDERSON GROUP PLC | $19.9M | 1.3M | ▼−2.3% Reduced · −31K sh | Q1 2026 | |
| 6 | First Eagle Investment Management, LLC | $18.8M | 1.2M | ▼−4.2% Reduced · −54K sh | Q1 2026 | |
| 7 | Portolan Capital Management, LLC | $18.1M | 1.2M | ▼−5.5% Reduced · −69K sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $15.6M | 1.0M | ▲+13% Added · +118K sh | Q1 2026 | |
| 9 | STATE STREET CORP | $11.6M | 759K | ▲+3.4% Added · +25K sh | Q1 2026 | |
| 10 | Russell Investments Group, Ltd. | $10.3M | 670K | ▼−2.0% Reduced · −14K sh | Q1 2026 | |
| 11 | FEDERATED HERMES, INC. | $9.4M | 610K | ▲2k× Added · +610K sh | Q1 2026 | |
| 12 | RAYMOND JAMES FINANCIAL INC | $7.8M | 512K | ▲+194% Added · +338K sh | Q1 2026 | |
| 13 | DIMENSIONAL FUND ADVISORS LP | $7.6M | 495K | ▼−4.8% Reduced · −25K sh | Q1 2026 | |
| 14 | SILVERCREST ASSET MANAGEMENT GROUP LLC | $7.5M | 486K | ▼−27% Reduced · −179K sh | Q1 2026 | |
| 15 | GOLDMAN SACHS GROUP INC | $6.5M | 423K | ▲+114% Added · +225K sh | Q1 2026 | |
| 16 | Alyeska Investment Group, L.P. | $6.1M | 400K | —Held | Q1 2026 | |
| 17 | NICHOLAS COMPANY, INC. | $6.0M | 393K | ▼−0.5% Reduced · −2K sh | Q1 2026 | |
| 18 | DIAMOND HILL CAPITAL MANAGEMENT INC | $5.9M | 387K | ▼−19% Reduced · −91K sh | Q1 2026 | |
| 19 | ArrowMark Colorado Holdings LLC | $5.8M | 380K | —Held | Q1 2026 | |
| 20 | Calamos Advisors LLC | $5.5M | 361K | ▼−1.1% Reduced · −4K sh | Q1 2026 | |
| 21 | RENAISSANCE TECHNOLOGIES LLC | $5.5M | 361K | ▲+5.7% Added · +19K sh | Q1 2026 | |
| 22 | MORGAN STANLEY | $5.3M | 345K | ▲+13% Added · +40K sh | Q1 2026 | |
| 23 | SEI INVESTMENTS CO | $4.8M | 315K | ▲+98% Added · +155K sh | Q1 2026 | |
| 24 | NORTHERN TRUST CORP | $4.3M | 278K | ▲+2.4% Added · +6K sh | Q1 2026 | |
| 25 | VANGUARD PORTFOLIO MANAGEMENT LLC | $4.1M | 268K | ▲New +268K 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 |
|---|---|---|---|---|---|
| Oct 31, 2025 | Michaels Adam Laurance | Chief Executive Officer, Director | Grant (A) | 19K | $0 |
| Oct 13, 2025 | Michaels Adam Laurance | Chief Executive Officer, Director | Sell (S) | 4K | $38K |
| Oct 3, 2025 | Tappan Moore III | Chief Operating Officer | Sell (S) | 2K | $21K |
| Sep 23, 2025 | Michaels Adam Laurance | Chief Executive Officer, Director | Sell (S) | 65K | $710K |
| Sep 18, 2025 | Romig Shirley | Director | Sell (S) | 4K | $41K |
| Jul 7, 2025 | Blake Lynn Larson | Director | Grant (A) | 5K | — |
| Jul 7, 2025 | Janeway Dean | Director | Grant (A) | 5K | — |
| Jul 7, 2025 | Henson Meghan | Director | Grant (A) | 5K | — |
| Jul 7, 2025 | Romig Shirley | Director | Grant (A) | 5K | — |
| Jun 6, 2025 | Tappan Moore III | Chief Operating Officer | Grant (A) | 6K | — |
| Jun 6, 2025 | Gruber Anthony | Chief Financial Officer | Grant (A) | 6K | — |
| Apr 15, 2025 | Michaels Adam Laurance | Chief Executive Officer, Director | Grant (A) | 94K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 48 funds | $13.9B |
| NVIDIA CORPNVDA | 45 funds | $21.0B |
| ALPHABET INC-CL AGOOGL | 44 funds | $9.2B |
| JPMORGAN CHASE & COJPM | 44 funds | $3.9B |
| APPLE INCAAPL | 43 funds | $15.5B |
| AMAZON.COM INCAMZN | 43 funds | $11.8B |
| META PLATFORMS INC-CLASS AMETA | 43 funds | $8.1B |
| HOME DEPOT INCHD | 43 funds | $2.1B |
| UNITEDHEALTH GROUP INCUNH | 43 funds | $1.3B |
| VISA INC-CLASS A SHARESV | 42 funds | $3.5B |
| BERKSHIRE HATHAWAY INC-CL BBRK/B | 42 funds | $3.3B |
| CHEVRON CORPCVX | 42 funds | $1.6B |
Ranked by how many of MAMA'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 MAMA. 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.