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 RLYB 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/RLYB"
Use Arkolith to show who owns RLYB, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | VIKING GLOBAL INVESTORS LP | $4.7M | 524K | ▼−88% Reduced · −3.7M sh | Q1 2026 | |
| 2 | Cormorant Asset Management, LP | $3.6M | 400K | ▲New +400K sh | Q1 2026 | |
| 3 | TPG GP A, LLC | $3.4M | 379K | ▲New +379K sh | Q1 2026 | |
| 4 | Laurion Capital Management LP | $2.7M | 303K | ▲New +303K sh | Q1 2026 | |
| 5 | Nantahala Capital Management, LLC | $2.7M | 301K | ▲New +301K sh | Q1 2026 | |
| 6 | CITADEL ADVISORS LLC | $178K | 20K | ▼−92% Reduced · −234K sh | Q1 2026 | |
| 7 | VANGUARD FIDUCIARY TRUST CO | $122K | 14K | ▲New +14K sh | Q1 2026 | |
| 8 | SBI Securities Co., Ltd. | $5K | 524 | ▼−88% Reduced · −4K sh | Q1 2026 | |
| 9 | DANSKE BANK A/S | $9 | 1 | ▲New +1 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 |
|---|---|---|---|---|---|
| Feb 23, 2026 | Lieber Jonathan I | Chief Financial Officer | Sell (S) | 789 | $4K |
| Feb 18, 2026 | HUNT RONALD | Director | Grant (A) | 14K | $51K |
| Feb 18, 2026 | MACKAY MARTIN | Director | Grant (A) | 18K | $65K |
| Feb 18, 2026 | Lieber Jonathan I | Chief Financial Officer | Grant (A) | 3K | $0 |
| May 13, 2025 | Hopfner Robert Lorne | Director | Grant (A) | 29K | $0 |
| May 13, 2025 | Nash Christine A | Director | Grant (A) | 29K | $0 |
| May 13, 2025 | Chung Wendy | Director | Grant (A) | 29K | $0 |
| May 13, 2025 | Boudreau Helen M | Director | Grant (A) | 29K | $0 |
| May 13, 2025 | HUNT RONALD | Director | Grant (A) | 29K | $0 |
| May 13, 2025 | MACKAY MARTIN | Director | Grant (A) | 29K | $0 |
| May 13, 2025 | Liu Hui | Director | Grant (A) | 29K | $0 |
| May 13, 2025 | Soteropoulos Paula | Director | Grant (A) | 29K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| BRIDGEBIO PHARMA INCBBIO | 6 funds | $1.3B |
| APPLE INCAAPL | 5 funds | $5.3B |
| MICROSOFT CORPMSFT | 5 funds | $4.0B |
| ALPHABET INC-CL AGOOGL | 5 funds | $3.0B |
| META PLATFORMS INC-CLASS AMETA | 5 funds | $2.6B |
| TESLA INCTSLA | 5 funds | $2.5B |
| JPMORGAN CHASE & COJPM | 5 funds | $2.2B |
| SCHWAB (CHARLES) CORPSCHW | 5 funds | $1.8B |
| WALT DISNEY CO/THEDIS | 5 funds | $1.5B |
| THERMO FISHER SCIENTIFIC INCTMO | 5 funds | $1.4B |
| FORTIVE CORPFTV | 5 funds | $1.3B |
| T-MOBILE US INCTMUS | 5 funds | $1.2B |
Ranked by how many of RLYB'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 RLYB. 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.