33 tracked 13F filers disclose a position in RLYB as of the latest SEC 13F filings, a combined $36.6M 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 | FMR LLC | $7.1M | 793K | ▼−53% Reduced · −901K sh | Q1 2026 | |
| 2 | VIKING GLOBAL INVESTORS LP | $4.7M | 524K | ▼−88% Reduced · −3.7M sh | Q1 2026 | |
| 3 | Cormorant Asset Management, LP | $3.6M | 400K | ▲New +400K sh | Q1 2026 | |
| 4 | TPG GP A, LLC | $3.4M | 379K | ▲New +379K sh | Q1 2026 | |
| 5 | BALYASNY ASSET MANAGEMENT L.P. | $3.4M | 377K | ▲New +377K sh | Q1 2026 | |
| 6 | Laurion Capital Management LP | $2.7M | 303K | ▲New +303K sh | Q1 2026 | |
| 7 | Nantahala Capital Management, LLC | $2.7M | 301K | ▲New +301K sh | Q1 2026 | |
| 8 | 5AM Venture Management, LLC | $2.6M | 292K | ▼−92% Reduced · −3.3M sh | Q1 2026 | |
| 9 | Almitas Capital LLC | $1.7M | 191K | ▼−88% Reduced · −1.3M sh | Q1 2026 | |
| 10 | RENAISSANCE TECHNOLOGIES LLC | $1.4M | 157K | ▼−81% Reduced · −679K sh | Q1 2026 | |
| 11 | VANGUARD CAPITAL MANAGEMENT LLC | $1.0M | 112K | →First observed position No prior filed position | Q1 2026 | |
| 12 | Mariner, LLC | $454K | 51K | ▼−88% Reduced · −354K sh | Q1 2026 | |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | $318K | 35K | ▼−86% Reduced · −213K sh | Q1 2026 | |
| 14 | Rangeley Capital, LLC | $270K | 30K | ▼−25% Reduced · −10K sh | Q1 2026 | |
| 15 | GTS SECURITIES LLC | $197K | 22K | ▲New +22K sh | Q1 2026 | |
| 16 | ADAR1 Capital Management, LLC | $184K | 21K | ▲New +21K sh | Q1 2026 | |
| 17 | CITADEL ADVISORS LLC | $178K | 20K | ▲New +20K sh | Q1 2026 | |
| 18 | BlackRock, Inc. | $157K | 17K | ▼−88% Reduced · −124K sh | Q1 2026 | |
| 19 | VANGUARD FIDUCIARY TRUST CO | $122K | 14K | →First observed position No prior filed position | Q1 2026 | |
| 20 | DIMENSIONAL FUND ADVISORS LP | $101K | 11K | ▲New +11K sh | Q1 2026 | |
| 21 | XTX Topco Ltd | $101K | 11K | ▼−88% Reduced · −86K sh | Q1 2026 | |
| 22 | UBS Group AG | $71K | 8K | ▲+73% Added · +3K sh | Q1 2026 | |
| 23 | JPMORGAN CHASE & CO | $20K | 2K | ▲30× Added · +2K sh | Q1 2026 | |
| 24 | Vanguard Global Advisers, LLC | $13K | 1K | →First observed position No prior filed position | Q1 2026 | |
| 25 | Tower Research Capital LLC (TRC) | $8K | 907 | ▼−80% Reduced · −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.
Last quarter, 7 funds opened a new position in RLYB, while 8 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 |
|---|---|---|
| WARNER BROS DISCOVERY INCWBD | 11 funds | $1.6B |
| MONTE ROSA THERAPEUTICS INCGLUE | 11 funds | $37.0M |
| APPLE INCAAPL | 10 funds | $3.9B |
| META PLATFORMS INC-CLASS AMETA | 10 funds | $2.6B |
| VISA INC-CLASS A SHARESV | 10 funds | $2.6B |
| ALPHABET INC-CL AGOOGL | 10 funds | $2.3B |
| MICROSOFT CORPMSFT | 10 funds | $2.2B |
| TESLA INCTSLA | 10 funds | $2.1B |
| JPMORGAN CHASE & COJPM | 10 funds | $1.8B |
| MCDONALD'S CORPMCD | 10 funds | $1.4B |
| BRIDGEBIO PHARMA INCBBIO | 10 funds | $1.2B |
| BOEING CO/THEBA | 10 funds | $1.2B |
Ranked by how many of RLYB's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| May 19, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy (P) | 10K | $140K |
| May 19, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy (P) | 200 | $3K |
| May 18, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy (P) | 6K | $84K |
| May 15, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy (P) | 100 | $1K |
| May 15, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy (P) | 200 | $3K |
| May 13, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy (P) | 4K | $56K |
| May 13, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy (P) | 75K | $1.1M |
| May 12, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy (P) | 800 | $11K |
| May 11, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy (P) | 5K | $71K |
| May 11, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy (P) | 25K | $350K |
| May 11, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy (P) | 20K | $279K |
| May 5, 2026 | ADAR1 Capital Management, LLC | 10% Owner | Buy (P) | 35K | $491K |
Connected entities for RLYB
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/RLYB/capital-change-brief"
Use Arkolith's capital_change_brief for RLYB. 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 RLYB. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.