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, Q1 2025
Institutional positions in ACELYRIN, Inc. as of Mar 31, 2025. 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
SLRN is no longer listed, so this page shows Q1 2025. 13F filings for later quarters list far fewer holders.
- Institutional holders
- 106
- −19 vs. Q4 2024
- Shares held
- 73.9M
- −13.8M (−15.8%) vs. Q4 2024
- Total value
- $182.6M
- −$93.2M (−33.8%) vs. Q4 2024
- New holders
- 23
- 22 more added
- Sold out
- 42
- 41 more reduced
1 institution that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2024: 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, Q1 2025
Shares, value and share of portfolio for each institution holding ACELYRIN, Inc.; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 4,079,706 | $10.1M | 0.00% | −3040.0% | Reduced |
| Madison Avenue Partners, LP | 4,142,640 | $10.2M | 0.87% | +4,142,640 | New |
| T. Rowe Price Investment Management, Inc. | 4,649,865 | $11.5M | 0.01% | −8,222,259−63.9% | Reduced |
| BlackRock, Inc. | 5,805,096 | $14.3M | 0.00% | −215,772−3.6% | Reduced |
| AyurMaya Capital Management Company, LP | 9,334,735 | $23.1M | 26.08% | 00.0% | Unchanged |
| Tang Capital Management LLC | 9,818,115 | $24.3M | 1.34% | +9,818,115 | New |
| Blue Owl Capital Holdings LP | 0 | $0 | 0.00% | −2,783,946−100.0% | Sold out |
| Siren, L.L.C. | 0 | $0 | 0.00% | −1,729,665−100.0% | Sold out |
| StemPoint Capital LP | 0 | $0 | 0.00% | −1,704,825−100.0% | Sold out |
| RTW Investments, LP | 0 | $0 | 0.00% | −978,310−100.0% | Sold out |
| Kynam Capital Management, LP | 0 | $0 | 0.00% | −847,366−100.0% | Sold out |
| Ikarian Capital, LLC | 0 | $0 | 0.00% | −676,608−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −662,981−100.0% | Sold out |
| Adage Capital Partners GP, L.L.C. | 0 | $0 | 0.00% | −450,000−100.0% | Sold out |
| Kennedy Capital Management, Inc. | 0 | $0 | 0.00% | −446,850−100.0% | Sold out |
| ADAR1 Capital Management, LLC | 0 | $0 | 0.00% | −444,967−100.0% | Sold out |
| TD Asset Management Inc | 0 | $0 | 0.00% | −267,656−100.0% | Sold out |
| Exome Asset Management LLC | 0 | $0 | 0.00% | −234,435−100.0% | Sold out |
| Ameriprise Financial Inc | 0 | $0 | 0.00% | −228,098−100.0% | Sold out |
| UBS Oconnor LLC | 0 | $0 | 0.00% | −211,938−100.0% | Sold out |
| Hudson Bay Capital Management LP | 0 | $0 | 0.00% | −196,620−100.0% | Sold out |
| Almitas Capital LLC | 0 | $0 | 0.00% | −148,704−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −134,680−100.0% | Sold out |
| Martingale Asset Management L P | 0 | $0 | 0.00% | −102,596−100.0% | Sold out |
| Acadian Asset Management LLC | 0 | $0 | 0.00% | −101,514−100.0% | Sold out |
| Public Employees Retirement System of Ohio | 0 | $0 | 0.00% | −97,347−100.0% | Sold out |
| DAFNA Capital Management LLC | 0 | $0 | 0.00% | −87,989−100.0% | Sold out |
| Algert Global LLC | 0 | $0 | 0.00% | −77,060−100.0% | Sold out |
| Russell Investments Group, Ltd. | 0 | $0 | 0.00% | −66,699−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −48,299−100.0% | Sold out |
| Boothbay Fund Management, LLC | 0 | $0 | 0.00% | −29,828−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −27,480−100.0% | Sold out |
| Thrivent Financial for Lutherans | 0 | $0 | 0.00% | −26,604−100.0% | Sold out |
| PDT Partners, LLC | 0 | $0 | 0.00% | −21,860−100.0% | Sold out |
| Virtus ETF Advisers LLC | 0 | $0 | 0.00% | −20,083−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −16,021−100.0% | Sold out |
| Man Group plc | 0 | $0 | 0.00% | −15,193−100.0% | Sold out |
| Rpo LLC | 0 | $0 | 0.00% | −14,693−100.0% | Sold out |
| Prudential Financial Inc | 0 | $0 | 0.00% | −14,130−100.0% | Sold out |
| HSBC Holdings PLC | 0 | $0 | 0.00% | −11,663−100.0% | Sold out |
| 4WEALTH Advisors, Inc. | 0 | $0 | 0.00% | −11,212−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −10,031−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −4,899−100.0% | Sold out |
| Federated Hermes, Inc. | 0 | $0 | 0.00% | −2,859−100.0% | Sold out |
| Comerica Bank | 0 | $0 | 0.00% | −1,428−100.0% | Sold out |
| Signaturefd, LLC | 0 | $0 | 0.00% | −175−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −62−100.0% | Sold out |
| Allworth Financial LP | 0 | $0 | 0.00% | −65−100.0% | Sold out |
| Nuveen Asset Management, LLC | – | – | – | – | Not filed |