ACELYRIN, Inc.
SLRNDelisted May 21, 2025- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001962918
ACELYRIN, Inc. was delisted on May 21, 2025; its insiders filed their last Form 4 on May 23, 2025; 106 institutions reported holding it in 13F filings for Q1 2025, worth $182.6M in total; no superinvestor held it.
13F holders, Q4 2023
Institutional positions in ACELYRIN, Inc. as of Dec 31, 2023. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 110
- +10 vs. Q3 2023
- Shares held
- 84.8M
- +4.81M (+6.0%) vs. Q3 2023
- Total value
- $632.6M
- −$175.7M (−21.7%) vs. Q3 2023
- New holders
- 35
- 31 more added
- Sold out
- 25
- 28 more reduced
2 institutions that held it in Q3 2023 haven't filed for Q4 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2023: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting SLRN on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 0 | $0 |
| Q1 2026 | 0 | $0 |
| Q4 2025 | 0 | $0 |
| Q3 2025 | 0 | $0 |
| Q2 2025 | 2 | $704 |
| Q1 2025 | 106 | $182.6M |
| Q4 2024 | 126 | $276.4M |
| Q3 2024 | 122 | $430.2M |
| Q2 2024 | 113 | $383.7M |
| Q1 2024 | 109 | $613.2M |
| Q4 2023 | 110 | $632.6M |
| Q3 2023 | 102 | $847.0M |
| Q2 2023 | 82 | $1.60B |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q4 2023
Shares, value and share of portfolio for each institution holding ACELYRIN, Inc.; share changes are against Q3 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock Inc. | 2,907,558 | $21.7M | 0.00% | +709,436+32.3% | Added |
| Artal Group S.A. | 3,035,888 | $22.6M | 0.77% | +566,609+22.9% | Added |
| JPMorgan Chase & Co | 3,188,477 | $23.8M | 0.00% | +24,386+0.8% | Added |
| venBio Partners LLC | 3,852,470 | $28.7M | 4.31% | 00.0% | Unchanged |
| OrbiMed Advisors LLC | 4,001,711 | $29.9M | 0.60% | −1,324,591−24.9% | Reduced |
| Opaleye Management Inc. | 4,146,138 | $30.9M | 8.30% | 00.0% | Unchanged |
| Vanguard Group Inc | 6,155,910 | $45.9M | 0.00% | +2,966,883+93.0% | Added |
| Citadel Advisors LLC | 6,474,048 | $48.3M | 0.05% | +547,355+9.2% | Added |
| FMR LLC | 8,822,271 | $65.8M | 0.01% | −139,455−1.6% | Reduced |
| AyurMaya Capital Management Company, LP | 9,334,735 | $69.6M | 100.00% | 00.0% | Unchanged |
| EcoR1 Capital, LLC | 0 | $0 | 0.00% | −1,402,201−100.0% | Sold out |
| Driehaus Capital Management LLC | 0 | $0 | 0.00% | −1,319,349−100.0% | Sold out |
| Massachusetts Financial Services Co | 0 | $0 | 0.00% | −642,158−100.0% | Sold out |
| Deep Track Capital, LP | 0 | $0 | 0.00% | −551,289−100.0% | Sold out |
| Price T Rowe Associates Inc | 0 | $0 | 0.00% | −458,261−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −202,662−100.0% | Sold out |
| Perceptive Advisors LLC | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| Ghost Tree Capital, LLC | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| Rafferty Asset Management, LLC | 0 | $0 | 0.00% | −173,696−100.0% | Sold out |
| Tri Locum Partners LP | 0 | $0 | 0.00% | −155,573−100.0% | Sold out |
| Rock Springs Capital Management LP | 0 | $0 | 0.00% | −141,876−100.0% | Sold out |
| Ensign Peak Advisors, Inc | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| TD Asset Management Inc | 0 | $0 | 0.00% | −75,164−100.0% | Sold out |
| Fred Alger Management, LLC | 0 | $0 | 0.00% | −53,206−100.0% | Sold out |
| Caption Management, LLC | 0 | $0 | 0.00% | −50,377−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −31,428−100.0% | Sold out |
| Profund Advisors LLC | 0 | $0 | 0.00% | −29,232−100.0% | Sold out |
| Man Group plc | 0 | $0 | 0.00% | – | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −12,401−100.0% | Sold out |
| Creative Financial Designs Inc | 0 | $0 | 0.00% | −300−100.0% | Sold out |
| Meeder Asset Management Inc | 0 | $0 | 0.00% | −122−100.0% | Sold out |
| Private Trust Co NA | 0 | $0 | 0.00% | −108−100.0% | Sold out |
| US Bancorp | 0 | $0 | 0.00% | −32−100.0% | Sold out |
| Bell Investment Advisors, Inc | 0 | $0 | 0.00% | −18−100.0% | Sold out |
| Grove Bank & Trust | 0 | $0 | 0.00% | −18−100.0% | Sold out |
| CHI Advisors LLC | – | – | – | – | Not filed |
| Decheng Capital Management III (Cayman), LLC | – | – | – | – | Not filed |