AcelyrinSLRN
13F holders, Q1 2025 (March 31)105holders −20
22new positions
42sold out
4famous investors
$2.47avg. 13F price*
At the end of Q1 2025, 105 institutions reported holding Acelyrin Inc. (SLRN) in their 13F filings, down 20 from Q4 2024. 22 opened new positions and 42 sold out. The largest holders were Tang Capital Management LLC ($24.3M), AyurMaya Capital Management Company, LP ($23.1M) and BlackRock, Inc. ($14.3M). 4 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Cliff Asness (0.0% of AQR Capital Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Acelyrin Inc.
- CUSIP
- 00445A100
- Latest filing quarter
- Q2 2025
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 22 | $50.7M |
| Exits | 42 | $40.7M |
All 13F filers, Q4 2024 → Q1 2025: 21,140,027 shares bought and 35,187,919 shares sold, net −14,047,892 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 105 holders
| Tang Capital Management LLC | 1.34% | New | 9,818,115 | $24.3M |
| AyurMaya Capital Management Company, LP | 26.08% | No change | 9,334,735 | $23.1M |
| BlackRock, Inc. | 0.00% | Reduce -3.6% | 5,805,096 | $14.3M |
| T. Rowe Price Investment Management, Inc. | 0.01% | Reduce -63.9% | 4,649,865 | $11.5M |
| Madison Avenue Partners, LP | 0.87% | New | 4,142,640 | $10.2M |
| Vanguard Group Inc. | 0.00% | Reduce -0.0% | 4,079,706 | $10.1M |
| Orbimed Advisors LLC | 0.24% | No change | 4,001,711 | $9.9M |
| venBio Partners LLC | 7.61% | No change | 3,806,410 | $9.4M |
| Velan Capital Investment Management LP | 8.56% | New | 3,366,945 | $8.3M |
| Tybourne Capital Management (hk) Ltd. | 30.48% | No change | 2,906,629 | $7.2M |
| General Atlantic, L.P. | 0.22% | No change | 2,695,327 | $6.7M |
| Samsara Biocapital, LLC | 1.11% | No change | 2,523,022 | $6.2M |
| Palo Alto Investors LP | 0.84% | No change | 1,792,895 | $4.4M |
| Geode Capital Management, LLC | 0.00% | Add +3.8% | 1,773,818 | $4.4M |
| Opaleye Management Inc. | 0.91% | Reduce -27.7% | 1,615,000 | $4.0M |
| State Street Corp. | 0.00% | Reduce -1.5% | 1,420,068 | $3.5M |
| Balyasny Asset Management L.P. | 0.01% | New | 1,305,015 | $3.2M |
| Alyeska Investment Group, L.P. | 0.01% | Reduce -59.4% | 615,878 | $1.5M |
| Renaissance Technologies | 0.00% | Add +28.5% | 599,800 | $1.5M |
| Northern Trust Corp. | 0.00% | Reduce -5.1% | 598,151 | $1.5M |
| JPMorgan Chase & Co. | 0.00% | Reduce -4.4% | 590,846 | $1.5M |
| Cantor Fitzgerald, L. P. | 0.05% | New | 588,664 | $1.5M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -11.4% | 544,575 | $1.3M |
| Towerview LLC | 0.96% | New | 540,000 | $1.3M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -38.3% | 351,407 | $868K |
| Morgan Stanley | 0.00% | Reduce -88.1% | 275,815 | $681K |
| Susquehanna Fundamental Investments, LLC | 0.01% | Add +15.1% | 273,412 | $675K |
| Nuveen, LLC | 0.00% | — | 202,239 | $500K |
| AQR Capital Management | 0.00% | New | 193,323 | $478K |
| Wellington Management Group LLP | 0.00% | Reduce -0.8% | 179,150 | $443K |
| Citadel Advisors | 0.00% | Reduce -95.8% | 176,437 | $436K |
| Bank of New York Mellon Corp | 0.00% | Reduce -2.0% | 173,277 | $428K |
| Stonepine Capital Management, LLC | 0.40% | Add +26.1% | 167,580 | $414K |
| Millennium Management | 0.00% | Reduce -96.8% | 149,298 | $369K |
| Bridgeway Capital Management, LLC | 0.01% | New | 140,900 | $348K |
| Monaco Asset Management SAM | 0.17% | New | 139,600 | $345K |
| Blair William & Co. | 0.00% | No change | 138,595 | $342K |
| Franklin Resources Inc. | 0.00% | Add +40.3% | 127,023 | $314K |
| Los Angeles Capital Management LLC | 0.00% | Reduce -10.2% | 109,612 | $271K |
| UBS Group AG | 0.00% | Reduce -44.6% | 103,525 | $256K |
| XTX Topco Ltd | 0.01% | Add +893.8% | 103,047 | $255K |
| Rhumbline Advisers | 0.00% | Reduce -5.6% | 102,174 | $252K |
| American Century Companies Inc. | 0.00% | Add +15.9% | 91,390 | $226K |
| Susquehanna International Group, LLP | 0.00% | Add +160.4% | 90,669 | $224K |
| Invesco Ltd. | 0.00% | Add +231.9% | 85,520 | $211K |
| Barclays PLC | 0.00% | Reduce -28.9% | 82,871 | $205K |
| Alps Advisors Inc. | 0.00% | Reduce -8.0% | 74,640 | $184K |
| Alliancebernstein L.P. | 0.00% | No change | 73,670 | $182K |
| HGC Investment Management Inc. | 0.06% | New | 70,425 | $174K |
| Deutsche Bank AG | 0.00% | Reduce -12.1% | 61,539 | $152K |
| Citigroup Inc. | 0.00% | Reduce -7.4% | 53,629 | $132K |
| Marshall Wace, LLP | 0.00% | Reduce -90.7% | 53,100 | $131K |
| Wells Fargo & Company | 0.00% | Add +1.1% | 52,608 | $130K |
| LMR Partners LLP | 0.00% | New | 50,000 | $124K |
| Intech Investment Management LLC | 0.00% | Add +87.4% | 49,830 | $123K |
| Yakira Capital Management, Inc. | 0.05% | New | 48,557 | $120K |
| Virtus Investment Advisers, LLC | 0.03% | Add +29.9% | 46,372 | $115K |
| Dimensional Fund Advisors LP | 0.00% | Reduce -62.1% | 44,755 | $111K |
| STRS Ohio | 0.00% | No change | 44,300 | $109K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +4.5% | 43,780 | $108K |
| Bank of America Corp. | 0.00% | Reduce -81.6% | 36,410 | $90K |
| Corebridge Financial, Inc. | 0.00% | Reduce -0.1% | 36,269 | $90K |
| Prelude Capital Management, LLC | 0.01% | Reduce -58.9% | 36,220 | $89K |
| T. Rowe Price Associates Inc. | 0.00% | Add +29.1% | 34,515 | $86K |
| Mariner, LLC | 0.00% | New | 31,389 | $78K |
| Manufacturers Life Insurance Company, The | 0.00% | Add +2.2% | 28,717 | $71K |
| SG Americas Securities, LLC | 0.00% | Reduce -11.1% | 27,110 | $67K |
| Western Wealth Management, LLC | 0.00% | New | 25,000 | $62K |
| CSS LLC | 0.01% | New | 24,564 | $61K |
| Voya Investment Management LLC | 0.00% | Reduce -6.8% | 20,768 | $51K |
| ProShare Advisors LLC | 0.00% | Reduce -18.7% | 20,570 | $51K |
| China Universal Asset Management Co., Ltd. | 0.00% | Reduce -5.0% | 20,199 | $50K |
| MetLife Investment Management, LLC | 0.00% | Reduce -56.8% | 18,493 | $46K |
| Nisa Investment Advisors, LLC | 0.00% | Add +19883.1% | 16,586 | $41K |
| Cibc World Markets Corp. | 0.00% | New | 16,427 | $41K |
| New York State Common Retirement Fund | 0.00% | No change | 15,512 | $38K |
| Bank of Montreal | 0.00% | Add +4.8% | 15,227 | $38K |
| Two Sigma Advisers, LP | 0.00% | Reduce -9.6% | 15,100 | $37K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 14,886 | $37K |
| Cwm, LLC | 0.00% | Add +8237.6% | 13,090 | $32K |
| Ausdal Financial Partners, Inc. | 0.00% | No change | 12,800 | $32K |
| Sei Investments Co. | 0.00% | No change | 10,782 | $27K |
| Cerity Partners LLC | 0.00% | New | 10,419 | $26K |
| Quadrature Capital Ltd | 0.00% | New | 10,246 | $25K |
| HighTower Advisors, LLC | 0.00% | Reduce -1.5% | 10,031 | $25K |
| FNY Investment Advisers, LLC | 0.01% | New | 10,000 | $24K |
| Group One Trading LLC | 0.00% | Add +201.1% | 7,662 | $19K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 7,243 | $18K |
| Legal & General Group Plc | 0.00% | No change | 6,625 | $16K |
| California State Teachers Retirement System | 0.00% | No change | 5,289 | $13K |
| Royal Bank of Canada | 0.00% | Reduce -76.6% | 5,263 | $13K |
| BNP Paribas Financial Markets | 0.00% | Reduce -93.3% | 5,061 | $13K |
| FMR LLC | 0.00% | Reduce -97.0% | 4,976 | $12K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -47.3% | 3,637 | $9K |
| Mirae Asset Global Investments Co., Ltd. | 0.00% | Add +0.8% | 3,370 | $9K |
| GF Fund Management Co. LTD. | 0.00% | Add +21.9% | 2,569 | $6K |
| Amalgamated Bank | 0.00% | No change | 2,452 | $6K |
| Sterling Capital Management LLC | 0.00% | Reduce -44.0% | 1,311 | $3K |
| Caitong International Asset Management Co., Ltd | 0.00% | New | 1,279 | $3K |
| Daiwa Securities Group Inc. | 0.00% | No change | 398 | $1K |
"% of holder's portfolio" is SLRN's weight in each manager's 13F, not the share of Acelyrin Inc. the manager owns.