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 MESO 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/MESO"
Use Arkolith to show who owns MESO, 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. | $9.7M | 631K | ▼−6.7% Reduced · −46K sh | Q1 2026 | |
| 2 | MORGAN STANLEY | $7.9M | 514K | ▼−14% Reduced · −83K sh | Q1 2026 | |
| 3 | GOLDMAN SACHS GROUP INC | $6.1M | 397K | ▲+0.3% Added · +1K sh | Q1 2026 | |
| 4 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $5.9M | 386K | ▼−10% Reduced · −43K sh | Q1 2026 | |
| 5 | UBS Group AG | $2.0M | 133K | ▲+83% Added · +60K sh | Q1 2026 | |
| 6 | BANK OF AMERICA CORP /DE/ | $1.5M | 100K | ▲+608% Added · +86K sh | Q1 2026 | |
| 7 | JANE STREET GROUP, LLC | $1.5M | 99K | ▼−41% Reduced · −69K sh | Q1 2026 | |
| 8 | CITADEL ADVISORS LLC | $1.3M | 86K | ▼−35% Reduced · −45K sh | Q1 2026 | |
| 9 | GROUP ONE TRADING LLC | $1.3M | 84K | ▲New +84K sh | Q1 2026 | |
| 10 | M&G Plc | $887K | 59K | ▲New +59K sh | Q1 2026 | |
| 11 | LPL Financial LLC | $763K | 50K | ▲+1.8% Added · +870 sh | Q1 2026 | |
| 12 | XTX Topco Ltd | $629K | 41K | ▲+227% Added · +28K sh | Q1 2026 | |
| 13 | TWO SIGMA INVESTMENTS, LP | $612K | 40K | ▼−31% Reduced · −18K sh | Q1 2026 | |
| 14 | Squarepoint Ops LLC | $524K | 34K | ▲+83% Added · +15K sh | Q1 2026 | |
| 15 | GEODE CAPITAL MANAGEMENT, LLC | $519K | 34K | ▲+9.8% Added · +3K sh | Q1 2026 | |
| 16 | &PARTNERS | $414K | 27K | ▲+46% Added · +8K sh | Q1 2026 | |
| 17 | CITIGROUP INC | $407K | 26K | ▲+0.2% Added · +65 sh | Q1 2026 | |
| 18 | ROYAL BANK OF CANADA | $404K | 26K | ▲+23% Added · +5K sh | Q1 2026 | |
| 19 | AQR CAPITAL MANAGEMENT LLC | $390K | 25K | ▲+0.5% Added · +129 sh | Q1 2026 | |
| 20 | Arax Advisory Partners | $376K | 24K | ▼−85% Reduced · −142K sh | Q1 2026 | |
| 21 | WELLS FARGO & COMPANY/MN | $278K | 18K | —Held | Q1 2026 | |
| 22 | Quadrature Capital Ltd | $265K | 17K | ▼−35% Reduced · −9K sh | Q1 2026 | |
| 23 | Rathbones Group PLC | $216K | 14K | —Held | Q1 2026 | |
| 24 | Vanguard Personalized Indexing Management, LLC | $215K | 14K | ▼−5.5% Reduced · −820 sh | Q1 2026 | |
| 25 | CHOREO, LLC | $191K | 12K | ▲+1.4% Added · +175 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.
No Form 4 insider transactions on file yet.
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 21 funds | $10.0B |
| AMAZON.COM INCAMZN | 21 funds | $8.7B |
| BROADCOM INCAVGO | 21 funds | $6.8B |
| ELI LILLY & COLLY | 21 funds | $2.9B |
| VISA INC-CLASS A SHARESV | 21 funds | $2.6B |
| TAIWAN SEMICONDUCTOR-SP ADRTSM | 21 funds | $2.5B |
| ORACLE CORPORCL | 21 funds | $2.0B |
| INTUITIVE SURGICAL INCISRG | 21 funds | $1.5B |
| UNITEDHEALTH GROUP INCUNH | 21 funds | $1.4B |
| LAM RESEARCH CORPLRCX | 21 funds | $1.2B |
| ALPHABET INC-CL AGOOGL | 20 funds | $6.3B |
| META PLATFORMS INC-CLASS AMETA | 20 funds | $5.1B |
Ranked by how many of MESO's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
No filings captured for this ticker in the live stream yet.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for MESO. 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.