Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
231 institutional managers reported holding RLAY for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 65%. 45 opened new positions; 34 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| SB Investment Advisers (UK) LTD (focused) | 27.90M | 15.52% | $277.4M | unchanged | 2020 Q3 |
| Commodore Capital LP (focused) | 17.00M | 9.45% | $169.0M | unchanged | 2025 Q2 |
| Casdin Capital, LLC (focused) | 14.42M | 8.02% | $143.3M | added +10.9% | 2020 Q3 |
| BlackRock | 12.98M | 7.21% | $129.0M | trimmed -1.9% | 2020 Q3 |
| Vanguard Group | 10.37M | 5.77% | $103.1M | added +6.7% | 2020 Q3 |
| Perceptive Advisors LLC | 9.75M | 5.42% | $96.9M | added +412.3% | 2025 Q4 |
| Bellevue Group AG | 7.80M | 4.33% | $77.5M | trimmed -6.6% | 2020 Q3 |
| State Street | 6.23M | 3.47% | $62.0M | trimmed -3% | 2020 Q3 |
| Nextech Invest, LTD. (focused) | 5.53M | 3.07% | $54.9M | added +17.5% | 2022 Q1 |
| TCG Crossover Management, LLC (focused) | 4.27M | 2.38% | $42.5M | added +32.7% | 2025 Q3 |
| FMR (Fidelity) | 3.70M | 2.06% | $36.7M | added +2178% | 2020 Q3 |
| Geode Capital | 3.51M | 1.95% | $34.9M | added +3% | 2020 Q3 |
| Balyasny Asset Management | 3.04M | 1.69% | $30.2M | added +44.7% | 2022 Q4 |
| Spruce Street Capital LP (focused) | 2.98M | 1.66% | $29.7M | unchanged | 2025 Q4 |
| Dimensional Fund Advisors | 2.94M | 1.64% | $29.2M | added +18.6% | 2022 Q1 |
| Adage Capital Partners GP, L.l.c. | 2.59M | 1.44% | $25.7M | added +418% | 2025 Q4 |
| Goldman Sachs | 2.54M | 1.41% | $25.3M | added +36.7% | 2020 Q3 |
| MPM Bioimpact LLC (focused) | 2.36M | 1.31% | $23.5M | added +5.7% | 2023 Q1 |
| Bank OF America CORP /DE/ | 1.94M | 1.08% | $19.3M | added +86.1% | 2020 Q3 |
| T. Rowe Price | 1.92M | 1.07% | $19.1M | added +17% | 2020 Q3 |
| EcoR1 Capital, LLC (focused) | 1.90M | 1.06% | $18.9M | opened | 2026 Q1 |
| Northern Trust | 1.68M | 0.93% | $16.7M | added +47.1% | 2020 Q3 |
| Alphabet INC. (focused) | 1.56M | 0.87% | $15.5M | unchanged | 2020 Q3 |
| Morgan Stanley | 1.43M | 0.80% | $14.2M | trimmed -29.1% | 2020 Q3 |
| Kynam Capital Management, LP (focused) | 1.42M | 0.79% | $14.2M | unchanged | 2024 Q4 |
| Two Sigma | 1.37M | 0.76% | $13.6M | trimmed -12.2% | 2023 Q3 |
| AQR Capital | 1.29M | 0.72% | $12.8M | added +10.9% | 2023 Q4 |
| Baker Bros. Advisors LP | 1.16M | 0.65% | $11.5M | unchanged | 2023 Q1 |
| Charles Schwab Investment Management | 1.11M | 0.62% | $11.1M | trimmed -2.2% | 2020 Q3 |
| Foresite Capital Management IV, LLC (focused) | 1.00M | 0.56% | $9.9M | unchanged | 2024 Q3 |
| Marshall Wace | 941.8k | 0.52% | $9.4M | opened | 2026 Q1 |
| Kalehua Capital Management LLC (focused) | 901.5k | 0.50% | $9.0M | unchanged | 2025 Q4 |
| Connor, Clark & Lunn Investment Management LTD. | 837.0k | 0.47% | $8.3M | added +114.9% | 2025 Q4 |
| Panagora Asset Management INC | 818.0k | 0.46% | $8.1M | opened | 2026 Q1 |
| Logos Global Management LP | 750.0k | 0.42% | $7.5M | opened | 2026 Q1 |
| UBS | 738.1k | 0.41% | $7.3M | added +45.9% | 2020 Q3 |
| Woodline Partners LP | 679.3k | 0.38% | $6.8M | unchanged | 2020 Q3 |
| Renaissance Technologies | 673.6k | 0.38% | $6.7M | added +4% | 2021 Q3 |
| Squadron Capital Management LLC (focused) | 672.5k | 0.37% | $6.7M | opened | 2026 Q1 |
| Invesco | 669.9k | 0.37% | $6.7M | trimmed -22.6% | 2020 Q4 |
| Arrowstreet Capital | 668.3k | 0.37% | $6.6M | opened | 2026 Q1 |
| Qube Research & Technologies LTD | 619.7k | 0.34% | $6.2M | opened | 2026 Q1 |
| Congress Asset Management CO | 618.9k | 0.34% | $6.2M | added +49.4% | 2023 Q2 |
| ArrowMark Colorado Holdings LLC | 541.1k | 0.30% | $5.4M | unchanged | 2020 Q3 |
| Elmind Capital, LP (focused) | 536.9k | 0.30% | $5.3M | unchanged | 2025 Q4 |
| Longaeva Partners L.p. | 470.5k | 0.26% | $4.7M | opened | 2026 Q1 |
| Bessemer Group INC | 457.9k | 0.26% | $4.6M | unchanged | 2020 Q3 |
| American Century Companies INC | 440.2k | 0.24% | $4.4M | added +1.8% | 2020 Q3 |
| Jane Street | 423.5k | 0.23% | $4.2M | added +453.8% | 2021 Q1 |
| HighVista Strategies LLC | 421.9k | 0.23% | $4.2M | trimmed -22.6% | 2025 Q2 |
Largest 50 of 231 shown; the full ranked, searchable register is at boothcheck.com/holders/RLAY. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.