RLYB — RALLYBIO CORP
As of Q2 2026, 11 SEC-registered investment managers reported holding RLYB (RALLYBIO CORP) in their latest 13F filings, with a combined reported value of $38.31M across 9.30M shares. That is +381.6% by share count (+7.37M shares) versus the previous quarter, while reported value moved +121.1%. Ownership is concentrated: the five largest holders account for 98.0% of reported value and the top ten for 100.0%.
Compared with the prior quarter, 2 opened new positions, 3 added to existing stakes, 3 trimmed, 1 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.
RLYB is classified in the Health Care sector.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.
| Fund | Quarter | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|---|
| Citadel Advisors history | Q2 2026 | 7.71M | $12.73M | 0.00% | Add |
| Fidelity Management & Research (FMR) history | Q2 2026 | 794.72K | $12.72M | 0.00% | Hold |
| Hillhouse Capital (HHLR Advisors) history | Q4 2021 | 903.67K | $8.62M | 0.14% | Hold |
| Viking Global Investors history | Q2 2026 | 524.35K | $8.39M | 0.02% | Hold |
| Balyasny Asset Management history | Q1 2026 | 376.57K | $3.38M | 0.01% | New |
| Renaissance Technologies history | Q2 2026 | 199.91K | $3.20M | 0.00% | Add |
| Vanguard Group history | Q4 2025 | 1.02M | $697.15K | 0.00% | Add |
| Geode Capital Management history | Q2 2026 | 32.05K | $512.87K | 0.00% | Reduce |
| BlackRock Inc history | Q2 2026 | 30.33K | $485.31K | 0.00% | Add |
| Two Sigma Investments history | Q2 2026 | 16.62K | $265.90K | 0.00% | New |
| Goldman Sachs Group history | Q2 2024 | 181.20K | $242.81K | 0.00% | Add |
| BNY Mellon history | Q1 2024 | 90.32K | $167.08K | 0.00% | Hold |
| Charles Schwab Investment Management history | Q1 2024 | 77.02K | $142.48K | 0.00% | Hold |
| Millennium Management history | Q2 2025 | 179.84K | $60.79K | 0.00% | Reduce |
| Marshall Wace history | Q1 2024 | 29.03K | $53.71K | 0.00% | Add |
| Manulife Financial history | Q3 2023 | 13.14K | $44.30K | 0.00% | Hold |
| Deutsche Bank AG history | Q3 2023 | 12.34K | $41.59K | 0.00% | Hold |
| Northern Trust Corp history | Q4 2025 | 38.12K | $26.16K | 0.00% | Hold |
| Prudential Financial history | Q4 2025 | 29.10K | $19.97K | 0.00% | Reduce |
| Legal & General Investment Management America history | Q1 2024 | 2.95K | $5.46K | 0.00% | Hold |
New Positions (Q2 2026)
- Two Sigma Investments 16.62K sh · $265.90K
- JPMorgan Chase & Co 9 sh · $145
Fully Exited (vs previous quarter)
- Balyasny Asset Management sold 376.57K sh · $3.38M
Fund Position History — shares by quarter (top 20 funds)
| Fund | Q3 2021 | Q4 2021 | Q1 2022 | Q2 2022 | Q3 2022 | Q4 2022 | Q1 2023 | Q2 2023 | Q3 2023 | Q4 2023 | Q1 2024 | Q2 2024 | Q3 2024 | Q4 2024 | Q1 2025 | Q2 2025 | Q3 2025 | Q4 2025 | Q1 2026 | Q2 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Citadel Advisors | — | — | — | — | — | 353.38K | 353.32K | 295.37K | 281.96K | 318.46K | 399.66K | 280.00K | — | — | 52.81K | 64.88K | 438.70K | 253.84K | 19.89K | 7.71M |
| Fidelity Management & Research (FMR) | 2.89M | 2.89M | 2.89M | 2.89M | 2.89M | 3.25M | 3.25M | 3.25M | 3.25M | 2.54M | 2.28M | 2.29M | 2.32M | 1.77M | 1.79M | 1.87M | 1.69M | 1.69M | 793.45K | 794.72K |
| Viking Global Investors | 4.19M | 4.19M | 4.19M | 4.19M | 4.19M | 4.19M | 4.19M | 4.19M | 4.19M | 4.19M | 4.19M | 4.19M | 4.19M | 4.19M | 4.19M | 4.19M | 4.19M | 4.19M | 524.35K | 524.35K |
| Renaissance Technologies | — | — | 52.72K | — | — | 13.80K | — | — | — | — | 488.10K | 340.70K | 403.70K | 441.32K | 396.50K | 485.03K | 714.80K | 835.69K | 156.53K | 199.91K |
| Geode Capital Management | 69.96K | 114.04K | 219.03K | 193.81K | 261.72K | 299.08K | 363.76K | 493.37K | 498.25K | 505.26K | 519.65K | 220.01K | 244.99K | 247.83K | 247.55K | 245.01K | 245.01K | 248.00K | 35.42K | 32.05K |
| BlackRock Inc | — | — | — | — | — | — | — | — | — | — | — | — | 200.85K | 201.22K | 209.42K | 154.65K | 141.66K | 141.66K | 17.49K | 30.33K |
| Two Sigma Investments | — | — | — | — | — | — | — | — | — | — | — | 53.25K | 86.32K | 76.81K | 66.71K | 63.79K | 21.45K | 37.00K | — | 16.62K |
| UBS Group AG | — | 2.71K | — | — | 868 | 4.89K | 7.06K | 17.66K | 17.88K | 25.73K | 30.67K | 10.64K | 2.34K | 8.36K | 15.40K | 120.24K | 2.37K | 4.58K | 7.91K | 146 |
| Morgan Stanley | 2.15K | 7.90K | 9.82K | 8.15K | 6.47K | 1.62K | 9.33K | 21.92K | 15.78K | 99.12K | 76.38K | 55.09K | 36.48K | 36.48K | 36.48K | 36.48K | 4.64K | 4.64K | 126 | 125 |
| Wells Fargo & Co | 39 | 3.90K | 3.67K | 633 | 524 | 300 | 3.88K | 11.87K | 7.78K | 9.63K | 26.02K | 37.80K | 50.30K | 40.30K | 42.20K | 40.03K | 300 | 300 | 37 | 37 |
| JPMorgan Chase & Co | 55.01K | 328.21K | 12.37K | 10.01K | 10.80K | 11.36K | 16.94K | 24.68K | 19.97K | 19.97K | 14.59K | 882 | 882 | 948 | 944 | 882 | 882 | 82 | — | 9 |
| Balyasny Asset Management | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 376.57K | — |
| Bank of America Corp | 628 | 3.94K | 3.02K | 3.03K | 2.84K | 40.68K | 20.50K | 23.39K | 28.82K | 61.23K | 23.92K | 8.89K | 8.74K | 8.74K | 8.75K | 8.77K | 216 | 251 | — | — |
| Citigroup Inc | 821 | 2.81K | 1.39K | 1.70K | 750 | 650 | — | 9.13K | 73 | 13.63K | 6.35K | 20.75K | 55 | 2.45K | — | — | 9.89K | 3.93K | — | — |
| Northern Trust Corp | 57.51K | 61.57K | 131.43K | 116.23K | 126.13K | 134.63K | 154.44K | 222.84K | 221.04K | 249.79K | 244.76K | 228.91K | 60.94K | 73.60K | 38.12K | 38.12K | 38.12K | 38.12K | — | — |
| Prudential Financial | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 38.40K | 29.10K | — | — |
| Vanguard Group | 390.69K | 319.88K | 710.05K | 696.51K | 798.64K | 968.70K | 995.02K | 1.04M | 1.05M | 1.06M | 1.08M | 857.90K | 925.52K | 925.52K | 971.93K | 909.94K | 999.63K | 1.02M | — | — |
| Hillhouse Capital (HHLR Advisors) | 903.67K | 903.67K | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Goldman Sachs Group | — | 13.06K | 15.29K | 37.84K | 33.52K | 20.85K | 20.58K | 46.05K | 14.49K | 19.02K | 13.24K | 181.20K | — | — | — | — | — | — | — | — |
| Deutsche Bank AG | 4.14K | 4.37K | 9.68K | 9.09K | 8.03K | 8.14K | 16.44K | 12.34K | 12.34K | — | — | — | — | — | — | — | — | — | — | — |
▲ Bought Low (fund opened/added, stock rose ≥5% next quarter) ▼ Sold High (fund reduced, stock fell ≥5% next quarter)
Drag / scroll to zoom · Default shows the most recent year · Annotations come from quarterly fund actions in 13F filings · Hover a marker for details