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/RARE/capital-change-brief"
Use Arkolith's capital_change_brief for RARE. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $152.9M | 7.3M | ▲+10% Added · +668K sh | Q1 2026 | |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | $112.8M | 5.4M | ▲New +5.4M sh | Q1 2026 | |
| 3 | STATE STREET CORP | $105.2M | 5.0M | ▲+17% Added · +718K sh | Q1 2026 | |
| 4 | AQR CAPITAL MANAGEMENT LLC | $95.9M | 4.6M | ▲+236% Added · +3.2M sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $87.8M | 4.2M | ▲New +4.2M sh | Q1 2026 | |
| 6 | RTW INVESTMENTS, LP | $76.4M | 3.6M | ▲+22% Added · +649K sh | Q1 2026 | |
| 7 | SANDS CAPITAL MANAGEMENT, LLC | $67.3M | 3.2M | ▼−7.8% Reduced · −271K sh | Q1 2026 | |
| 8 | Sofinnova Investments, Inc. | $65.9M | 3.1M | ▲38× Added · +3.1M sh | Q1 2026 | |
| 9 | Bellevue Group AG | $49.9M | 2.4M | ▲922× Added · +2.4M sh | Q1 2026 | |
| 10 | TWO SIGMA INVESTMENTS, LP | $46.2M | 2.2M | ▲+420% Added · +1.8M sh | Q1 2026 | |
| 11 | FRONTIER CAPITAL MANAGEMENT CO LLC | $45.9M | 2.2M | ▲+12% Added · +226K sh | Q1 2026 | |
| 12 | CITADEL ADVISORS LLC | $44.3M | 2.1M | ▼−9.1% Reduced · −211K sh | Q1 2026 | |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | $38.8M | 1.8M | ▲+0.6% Added · +11K sh | Q1 2026 | |
| 14 | MILLENNIUM MANAGEMENT LLC | $37.1M | 1.8M | ▲+101% Added · +892K sh | Q1 2026 | |
| 15 | MORGAN STANLEY | $31.4M | 1.5M | ▼−18% Reduced · −326K sh | Q1 2026 | |
| 16 | JACOBS LEVY EQUITY MANAGEMENT, INC | $30.0M | 1.4M | ▼−18% Reduced · −318K sh | Q1 2026 | |
| 17 | VOLORIDGE INVESTMENT MANAGEMENT, LLC | $29.9M | 1.4M | ▲+122% Added · +783K sh | Q1 2026 | |
| 18 | NORGES BANK | $29.0M | 1.3M | ▲+28% Added · +277K sh | Q4 2025 | |
| 19 | D. E. Shaw & Co., Inc. | $26.4M | 1.3M | ▲+266% Added · +916K sh | Q1 2026 | |
| 20 | Rock Springs Capital Management LP | $25.5M | 1.2M | ▼−3.8% Reduced · −48K sh | Q1 2026 | |
| 21 | Candriam S.C.A. | $23.0M | 1.1M | ▲+37% Added · +297K sh | Q1 2026 | |
| 22 | BANK OF AMERICA CORP /DE/ | $21.9M | 1.0M | ▼−14% Reduced · −167K sh | Q1 2026 | |
| 23 | Qube Research & Technologies Ltd | $19.2M | 915K | ▲New +915K sh | Q1 2026 | |
| 24 | Point72 Asset Management, L.P. | $18.7M | 893K | ▲New +893K sh | Q1 2026 | |
| 25 | Eagle Health Investments LP | $18.5M | 884K | ▲New +884K 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 |
|---|---|---|---|---|---|
| Jul 1, 2026 | Horn Howard | Chief Financial Officer | Sell (S) | 5K | $156K |
| Jun 15, 2026 | Parschauer Karah Herdman | EVP and Chief Legal Officer | Sell (S) | 2K | $47K |
| Jun 15, 2026 | Sanders Corazon (Corsee) D. | Director | Sell (S) | 2K | $50K |
| Jun 1, 2026 | Horn Howard | Chief Financial Officer | Sell (S) | 5K | $111K |
| May 18, 2026 | SULIMAN SHEHNAAZ | Director | Sell (S) | 6K | $144K |
| May 14, 2026 | NARACHI MICHAEL | Director | Grant (A) | 8K | $0 |
| May 14, 2026 | NARACHI MICHAEL | Director | Grant (A) | 14K | $0 |
| May 14, 2026 | Dunsire Deborah | Director | Grant (A) | 8K | $0 |
| May 14, 2026 | Dunsire Deborah | Director | Grant (A) | 14K | $0 |
| May 14, 2026 | Fust Matthew K | Director | Grant (A) | 8K | $0 |
| May 14, 2026 | Fust Matthew K | Director | Grant (A) | 14K | $0 |
| May 14, 2026 | Ray Amrit | Director | Grant (A) | 8K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| ELI LILLY & COLLY | 97 funds | $11.3B |
| MICROSOFT CORPMSFT | 95 funds | $43.4B |
| AMAZON.COM INCAMZN | 95 funds | $34.1B |
| META PLATFORMS INC-CLASS AMETA | 93 funds | $21.3B |
| NVIDIA CORPNVDA | 92 funds | $67.8B |
| BROADCOM INCAVGO | 92 funds | $24.8B |
| TESLA INCTSLA | 91 funds | $13.7B |
| VISA INC-CLASS A SHARESV | 91 funds | $8.8B |
| PALANTIR TECHNOLOGIES INC-APLTR | 91 funds | $5.6B |
| INTUITIVE SURGICAL INCISRG | 91 funds | $4.2B |
| APPLE INCAAPL | 90 funds | $49.3B |
| ALPHABET INC-CL AGOOGL | 90 funds | $30.1B |
Ranked by how many of RARE'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 RARE. 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.