181 tracked 13F filers disclose a position in JANX as of the latest SEC 13F filings, a combined $814.9M in reported value. 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.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | RA CAPITAL MANAGEMENT, L.P. | $155.5M | 11.2M | —Held | Q1 2026 | |
| 2 | BlackRock, Inc. | $75.5M | 5.4M | ▲+33% Added · +1.4M sh | Q1 2026 | |
| 3 | Janus Henderson Group Ltd. | $58.3M | 4.2M | ▼−22% Reduced · −1.2M sh | Q1 2026 | |
| 4 | Prosight Management, LP | $49.3M | 3.5M | ▲+48% Added · +1.2M sh | Q1 2026 | |
| 5 | STATE STREET CORP | $46.2M | 3.0M | ▲+22% Added · +541K sh | Q2 2026 | |
| 6 | FMR LLC | $35.2M | 2.5M | ▼−28% Reduced · −977K sh | Q1 2026 | |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | $25.2M | 1.8M | →First observed position No prior filed position | Q1 2026 | |
| 8 | TCG Crossover Management, LLC | $24.9M | 1.8M | —Held | Q1 2026 | |
| 9 | Alyeska Investment Group, L.P. | $22.3M | 1.6M | ▲+23% Added · +300K sh | Q1 2026 | |
| 10 | VANGUARD PORTFOLIO MANAGEMENT LLC | $17.9M | 1.3M | →First observed position No prior filed position | Q1 2026 | |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | $18.5M | 1.2M | ▲+5.0% Added · +57K sh | Q2 2026 | |
| 12 | Deep Track Capital, LP | $16.5M | 1.2M | ▲13× Added · +1.1M sh | Q1 2026 | |
| 13 | Point72 Asset Management, L.P. | $16.1M | 1.2M | ▲+20% Added · +194K sh | Q1 2026 | |
| 14 | ALGERT GLOBAL LLC | $17.1M | 1.1M | ▲+151% Added · +667K sh | Q2 2026 | |
| 15 | BALYASNY ASSET MANAGEMENT L.P. | $15.2M | 1.1M | ▲+23% Added · +205K sh | Q1 2026 | |
| 16 | Logos Global Management LP | $13.9M | 1.0M | —Held | Q1 2026 | |
| 17 | ORBIMED ADVISORS LLC | $13.7M | 984K | ▼−50% Reduced · −971K sh | Q1 2026 | |
| 18 | Nantahala Capital Management, LLC | $12.4M | 810K | —Held | Q2 2026 | |
| 19 | BANK OF AMERICA CORP /DE/ | $11.1M | 802K | ▲+8.6% Added · +63K sh | Q1 2026 | |
| 20 | Woodline Partners LP | $10.3M | 738K | ▼−28% Reduced · −289K sh | Q1 2026 | |
| 21 | MORGAN STANLEY | $9.8M | 704K | ▲+14% Added · +86K sh | Q1 2026 | |
| 22 | Squarepoint Ops LLC | $8.4M | 604K | ▲+54% Added · +213K sh | Q1 2026 | |
| 23 | GOLDMAN SACHS GROUP INC | $8.4M | 602K | ▼−44% Reduced · −472K sh | Q1 2026 | |
| 24 | TANG CAPITAL MANAGEMENT LLC | $7.0M | 500K | ▲New +500K sh | Q1 2026 | |
| 25 | MILLENNIUM MANAGEMENT LLC | $5.4M | 387K | ▲+33% Added · +97K 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.
Last quarter, 5 funds opened a new position in JANX and 32 added to an existing one, while 19 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 93 funds | $252.5B |
| AMAZON.COM INCAMZN | 93 funds | $123.4B |
| META PLATFORMS INC-CLASS AMETA | 93 funds | $74.1B |
| MICROSOFT CORPMSFT | 92 funds | $169.0B |
| MICRON TECHNOLOGY INCMU | 92 funds | $24.8B |
| ELI LILLY & COLLY | 91 funds | $51.6B |
| BOSTON SCIENTIFIC CORPBSX | 91 funds | $10.3B |
| INTUITIVE SURGICAL INCISRG | 89 funds | $19.3B |
| THERMO FISHER SCIENTIFIC INCTMO | 89 funds | $14.4B |
| BROADCOM INCAVGO | 88 funds | $101.8B |
| APPLIED MATERIALS INCAMAT | 88 funds | $19.5B |
| ALPHABET INC-CL AGOOGL | 87 funds | $99.7B |
Ranked by how many of JANX's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 2, 2026 | Doyle Janeen Noel | Chief Corp. & Bus. Dev. Ofcr | Sell (S) | 4K | $57K |
| May 11, 2026 | Dobek Maria | Vice President, Accounting | Sell (S) | 2K | $29K |
| Jan 2, 2026 | Dobek Maria | Vice President, Accounting | Sell (S) | 1K | $20K |
| Jan 2, 2026 | Campbell David Alan | President and CEO, Director | Sell (S) | 8K | $111K |
| Jan 2, 2026 | Meyer Andrew Hollman | Chief Business Officer | Sell (S) | 2K | $26K |
| Jan 2, 2026 | Winter Charles M. | Chief Technical Officer | Sell (S) | 2K | $33K |
| Jan 2, 2026 | DiRaimondo Thomas | Chief Scientific Officer | Sell (S) | 3K | $34K |
| Jan 2, 2026 | McIver Zachariah | Chief Medical Officer | Sell (S) | 3K | $37K |
| Dec 1, 2025 | Meyer Andrew Hollman | Chief Business Officer | Sell (S) | 633 | $21K |
| Dec 1, 2025 | Meyer Andrew Hollman | Chief Business Officer | Sell (S) | 3K | $89K |
| Nov 14, 2025 | Meyer Andrew Hollman | Chief Business Officer | Sell (S) | 3K | $100K |
| Oct 28, 2025 | Meyer Andrew Hollman | Chief Business Officer | Sell (S) | 17K | $501K |
Connected entities for JANX
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/JANX/capital-change-brief"
Use Arkolith's capital_change_brief for JANX. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for JANX. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.