Quick Takeaways
- Madison Avenue Partners, LP filed SCHEDULE 13D for ACELYRIN, Inc. Common Stock (SLRN).
- Disclosed ownership: 5.1%.
- Date of event: 29 Apr 2025.
Madison Avenue Partners, LP - 29 Apr 2025 SCHEDULE 13D Report for ACELYRIN, Inc. Common Stock (SLRN)
- Filing Manager
- Madison Avenue Partners, LP
- Reporting Manager
- Madison Avenue Partners, LP
- Security
- ACELYRIN, Inc. Common Stock
- Symbol
- SLRN
- Shares outstanding
- 99,789,412 shares
- Disclosed Ownership
- 5,089,260 shares
- Ownership
- 5.1%
- Form type
- SCHEDULE 13D
- Filing time
- 30 Apr 2025, 20:27:15 UTC
- Date of event
- 29 Apr 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"Madison Avenue Partners, LP disclosed 5.1% ownership in ACELYRIN, Inc. Common Stock (SLRN) on 29 Apr 2025."
What Changed
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 30 Apr 2025, 20:27.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Official SEC Source
Backed by Schedule 13D/13G
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
See Original FilingReporting Managers (6)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Madison Avenue International LP | 5.1% | 5,089,260 | 0 | 5,089,260 | /s/ Eli Samaha | Eli Samaha, as Manager of Madison Avenue GP, LLC, the General Partner of Madison Avenue International LP | |
| Madison Avenue Partners, LP | 5.1% | 5,089,260 | 0 | 5,089,260 | /s/ Eli Samaha | Eli Samaha, as Managing Member of EMAI Management, LLC, the General Partner of Madison Avenue Partners, LP | 0001801265 |
| EMAI Management, LLC | 5.1% | 5,089,260 | 0 | 5,089,260 | /s/ Eli Samaha | Eli Samaha, as Manager | |
| Madison Avenue GP, LLC | 5.1% | 5,089,260 | 0 | 5,089,260 | /s/ Eli Samaha | Eli Samaha, as Member | |
| Caraway Jackson Investments LLC | 5.1% | 5,089,260 | 0 | 5,089,260 | /s/ Eli Samaha | Eli Samaha, as Member | |
| Eli Samaha | 5.1% | 5,089,260 | 0 | 5,089,260 | /s/ Eli Samaha | Eli Samaha | 0001877589 |