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 NAMS 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/NAMS"
Use Arkolith to show who owns NAMS, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Frazier Life Sciences Management, L.P. | $542.4M | 16.9M | —Held | Q1 2026 | |
| 2 | RA CAPITAL MANAGEMENT, L.P. | $305.7M | 9.6M | —Held | Q1 2026 | |
| 3 | DEERFIELD MANAGEMENT COMPANY, L.P. | $136.5M | 4.3M | ▲+2.4% Added · +100K sh | Q1 2026 | |
| 4 | VIKING GLOBAL INVESTORS LP | $134.6M | 4.2M | —Held | Q1 2026 | |
| 5 | Duquesne Family Office LLC | $98.3M | 3.1M | —Held | Q1 2026 | |
| 6 | Polar Capital Holdings Plc | $90.6M | 2.8M | ▲+2.0% Added · +55K sh | Q1 2026 | |
| 7 | WESTFIELD CAPITAL MANAGEMENT CO LP | $70.5M | 2.2M | ▲New +2.2M sh | Q1 2026 | |
| 8 | MAVERICK CAPITAL LTD | $70.0M | 2.2M | ▲+15% Added · +292K sh | Q1 2026 | |
| 9 | Cormorant Asset Management, LP | $30.4M | 950K | ▼−5.0% Reduced · −50K sh | Q1 2026 | |
| 10 | Woodline Partners LP | $24.1M | 752K | ▲+0.1% Added · +1K sh | Q1 2026 | |
| 11 | CITADEL ADVISORS LLC | $22.8M | 712K | ▲+12% Added · +77K sh | Q1 2026 | |
| 12 | Logos Global Management LP | $19.2M | 600K | ▲+33% Added · +150K sh | Q1 2026 | |
| 13 | Rock Springs Capital Management LP | $18.8M | 589K | ▲+5.7% Added · +32K sh | Q1 2026 | |
| 14 | Slate Path Capital LP | $10.2M | 319K | —Held | Q1 2026 | |
| 15 | Eversept Partners, LP | $9.1M | 286K | ▼−32% Reduced · −135K sh | Q1 2026 | |
| 16 | SEB Asset Management AB | $8.7M | 273K | ▲New +273K sh | Q1 2026 | |
| 17 | ArrowMark Colorado Holdings LLC | $8.3M | 260K | ▼−13% Reduced · −39K sh | Q1 2026 | |
| 18 | Ensign Peak Advisors, Inc | $8.0M | 249K | ▼−55% Reduced · −300K sh | Q1 2026 | |
| 19 | GILDER GAGNON HOWE & CO LLC | $7.7M | 241K | ▼−2.8% Reduced · −7K sh | Q1 2026 | |
| 20 | PEREGRINE CAPITAL MANAGEMENT LLC | $5.7M | 178K | ▲New +178K sh | Q1 2026 | |
| 21 | VANGUARD PORTFOLIO MANAGEMENT LLC | $4.3M | 135K | ▲New +135K sh | Q1 2026 | |
| 22 | ALPS ADVISORS INC | $3.0M | 94K | ▲+0.7% Added · +694 sh | Q1 2026 | |
| 23 | STATE STREET CORP | $2.0M | 63K | ▼−7.9% Reduced · −5K sh | Q1 2026 | |
| 24 | Walleye Capital LLC | $1.9M | 58K | ▼−39% Reduced · −38K sh | Q1 2026 | |
| 25 | Knights of Columbus Asset Advisors LLC | $1.2M | 36K | ▲+11% Added · +4K 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 |
|---|---|---|---|---|---|
| Mar 11, 2026 | LANGE LOUIS G | Director | Sell (S) | 44K | $1.3M |
| Mar 11, 2026 | LANGE LOUIS G | Director | Sell (S) | 446 | $14K |
| Mar 9, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Sell (S) | 101K | $3.1M |
| Mar 9, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Option exercise (M) | 101K | $0 |
| Mar 9, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Option exercise (M) | 101K | — |
| Mar 9, 2026 | LANGE LOUIS G | Director | Option exercise (X) | 45K | $513K |
| Mar 9, 2026 | LANGE LOUIS G | Director | Option exercise (X) | 45K | $0 |
| Mar 6, 2026 | LANGE LOUIS G | Director | Sell (S) | 28K | $829K |
| Mar 6, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Option exercise (M) | 94K | — |
| Mar 6, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Sell (S) | 94K | $2.9M |
| Mar 6, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Option exercise (M) | 94K | $0 |
| Mar 5, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Sell (S) | 104K | $3.2M |
| Company | Co-held by | Combined value |
|---|---|---|
| AMAZON.COM INCAMZN | 47 funds | $17.5B |
| MICROSOFT CORPMSFT | 44 funds | $18.0B |
| ALPHABET INC-CL AGOOGL | 44 funds | $12.5B |
| ELI LILLY & COLLY | 44 funds | $5.7B |
| NVIDIA CORPNVDA | 43 funds | $28.8B |
| VISA INC-CLASS A SHARESV | 43 funds | $5.9B |
| META PLATFORMS INC-CLASS AMETA | 42 funds | $9.7B |
| INTUITIVE SURGICAL INCISRG | 42 funds | $2.7B |
| BOSTON SCIENTIFIC CORPBSX | 42 funds | $1.7B |
| APPLE INCAAPL | 41 funds | $20.5B |
| TESLA INCTSLA | 41 funds | $7.5B |
| ADVANCED MICRO DEVICESAMD | 41 funds | $2.4B |
Ranked by how many of NAMS'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 NAMS. 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.