Who owns RLYB (RLYB)
Which tracked institutional funds hold RLYB, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See RLYB company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on RLYB is one-sided between 2025-Q4 and 2026-Q1: 11 added or opened and 3 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
RLYB’s largest tracked holder by dollar value, FMR LLC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in RLYB divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 38 tracked filers holding RLYB, 15 increased or opened the position and 44 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in RLYB between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 5
- Cormorant Asset Management, LP$4M
- BALYASNY ASSET MANAGEMENT L.P.$3M
- Laurion Capital Management LP$3M
- Nantahala Capital Management, LLC$3M
- VANGUARD CAPITAL MANAGEMENT LLC$1M
Full exits 1
- VANGUARD GROUP INC$697K
Largest adds
- FMR LLC$6M
- VIKING GLOBAL INVESTORS LP$2M
- TPG GP A, LLC$1M
- Pivotal bioVenture Partners Investment Advisor LLC$1M
- RENAISSANCE TECHNOLOGIES LLC$831K
- Almitas Capital LLC$666K
Largest trims
- AJU IB Investment Co., Ltd.$3M
- JOHNSON & JOHNSON$1M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| FMR LLC trimmed | 793,451 | $7M | 15.5% | 2026-Q1 |
| VIKING GLOBAL INVESTORS LP trimmed | 524,347 | $5M | 10.2% | 2026-Q1 |
| Cormorant Asset Management, LP new | 400,000 | $4M | 7.8% | 2026-Q1 |
| TPG GP A, LLC trimmed | 378,551 | $3M | 7.4% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. new | 376,573 | $3M | 7.3% | 2026-Q1 |
| Laurion Capital Management LP trimmed | 302,756 | $3M | 5.9% | 2026-Q1 |
| Nantahala Capital Management, LLC new | 300,635 | $3M | 5.9% | 2026-Q1 |
| Pivotal bioVenture Partners Investment Advisor LLC trimmed | 300,579 | $3M | 5.9% | 2026-Q1 |
| 5AM Venture Management, LLC trimmed | 291,788 | $3M | 5.7% | 2026-Q1 |
| Almitas Capital LLC trimmed | 191,206 | $2M | 3.7% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 156,527 | $1M | 3.1% | 2026-Q1 |
| JOHNSON & JOHNSON trimmed | 152,901 | $1M | 3.0% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 112,040 | $1M | 2.2% | 2026-Q1 |
| AJU IB Investment Co., Ltd. trimmed | 94,334 | $846K | 1.8% | 2026-Q1 |
| Mariner, LLC trimmed | 50,566 | $454K | 1.0% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 35,425 | $318K | 0.7% | 2026-Q1 |
| DELTEC ASSET MANAGEMENT LLC new | 33,750 | $303K | 0.7% | 2026-Q1 |
| Rangeley Capital, LLC trimmed | 30,130 | $270K | 0.6% | 2026-Q1 |
| GTS SECURITIES LLC new | 22,016 | $197K | 0.4% | 2026-Q1 |
| ADAR1 Capital Management, LLC added | 20,535 | $184K | 0.4% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 19,886 | $178K | 0.4% | 2026-Q1 |
| BlackRock, Inc. trimmed | 17,486 | $157K | 0.3% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 13,547 | $122K | 0.3% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 11,280 | $101K | 0.2% | 2026-Q1 |
| XTX Topco Ltd trimmed | 11,226 | $101K | 0.2% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC trimmed | 10,433 | $92K | 0.2% | 2026-Q1 |
| UBS Group AG added | 7,914 | $71K | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 2,497 | $20K | 0.0% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 1,442 | $13K | 0.0% | 2026-Q1 |
| Tower Research Capital LLC (TRC) trimmed | 907 | $8K | 0.0% | 2026-Q1 |
| Hartford Financial Management Inc. trimmed | 812 | $7K | 0.0% | 2026-Q1 |
| SBI Securities Co., Ltd. trimmed | 524 | $5K | 0.0% | 2026-Q1 |
| MORGAN STANLEY trimmed | 126 | $1K | 0.0% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 120 | $1K | 0.0% | 2026-Q1 |
| Fortitude Family Office, LLC new | 53 | $475 | 0.0% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 37 | $332 | 0.0% | 2026-Q1 |
| Allworth Financial LP trimmed | 6 | $54 | 0.0% | 2026-Q1 |
| DANSKE BANK A/S new | 1 | $9 | 0.0% | 2026-Q1 |
| New Leaf Venture Partners, L.L.C. | 3,301,603 | $2M | 3.6% | 2025-Q3 stale |
| VANGUARD GROUP INC added | 1,016,249 | $697K | 1.5% | 2025-Q4 stale |
| Aberdeen Group plc trimmed | 1,595,262 | $539K | 1.2% | 2025-Q2 stale |
| Allostery Investments LP trimmed | 752,235 | $492K | 1.1% | 2025-Q1 stale |
| Canaan Partners XI LLC | 450,000 | $309K | 0.7% | 2025-Q4 stale |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 100,724 | $69K | 0.2% | 2025-Q4 stale |
| MILLENNIUM MANAGEMENT LLC trimmed | 179,839 | $61K | 0.1% | 2025-Q2 stale |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 91,600 | $60K | 0.1% | 2025-Q1 stale |
| STATE STREET CORP | 62,072 | $43K | 0.1% | 2025-Q4 stale |
| NORTHERN TRUST CORP | 38,124 | $26K | 0.1% | 2025-Q4 stale |
| TWO SIGMA INVESTMENTS, LP added | 37,000 | $25K | 0.1% | 2025-Q4 stale |
| Squarepoint Ops LLC added | 33,270 | $22K | 0.0% | 2025-Q1 stale |
| PRUDENTIAL FINANCIAL INC trimmed | 29,100 | $20K | 0.0% | 2025-Q4 stale |
| Virtu Financial LLC trimmed | 27,132 | $19K | 0.0% | 2025-Q4 stale |
| HRT FINANCIAL LP trimmed | 21,387 | $14K | 0.0% | 2025-Q4 stale |
| OneDigital Investment Advisors LLC | 20,000 | $14K | 0.0% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP trimmed | 19,300 | $13K | 0.0% | 2025-Q4 stale |
| GSA CAPITAL PARTNERS LLP new | 19,303 | $13K | 0.0% | 2025-Q4 stale |
| Ground Swell Capital, LLC new | 15,399 | $11K | 0.0% | 2025-Q4 stale |
| GREAT VALLEY ADVISOR GROUP, INC. | 15,000 | $10K | 0.0% | 2025-Q4 stale |
| Utah Retirement Systems | 13,240 | $9K | 0.0% | 2025-Q4 stale |
| ACT Advisors, LLC. new | 13,153 | $9K | 0.0% | 2025-Q4 stale |
| CAPTRUST FINANCIAL ADVISORS | 10,000 | $7K | 0.0% | 2025-Q4 stale |
| MERCER GLOBAL ADVISORS INC /ADV | 10,000 | $7K | 0.0% | 2025-Q4 stale |
| Point72 Asia (Singapore) Pte. Ltd. trimmed | 10,007 | $7K | 0.0% | 2025-Q1 stale |
| TWO SIGMA SECURITIES, LLC new | 15,153 | $5K | 0.0% | 2025-Q2 stale |
| JANE STREET GROUP, LLC added | 11,742 | $4K | 0.0% | 2025-Q2 stale |
| BARCLAYS PLC trimmed | 5,719 | $4K | 0.0% | 2025-Q4 stale |
| HSBC HOLDINGS PLC trimmed | 10,520 | $4K | 0.0% | 2025-Q2 stale |
| CITIGROUP INC trimmed | 3,932 | $3K | 0.0% | 2025-Q4 stale |
| FEDERATED HERMES, INC. | 2,209 | $747 | 0.0% | 2025-Q2 stale |
| Point72 (DIFC) Ltd trimmed | 975 | $638 | 0.0% | 2025-Q1 stale |
| RAYMOND JAMES FINANCIAL INC new | 850 | $288 | 0.0% | 2025-Q2 stale |
| Rockefeller Capital Management L.P. new | 550 | $274 | 0.0% | 2025-Q3 stale |
| BANK OF AMERICA CORP /DE/ added | 251 | $172 | 0.0% | 2025-Q4 stale |
| JONES FINANCIAL COMPANIES LLLP new | 90 | $50 | 0.0% | 2025-Q3 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.