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.
Holders of 5% or more of SLRN
Holders whose latest Schedule 13D or 13G filing reports 5% or more of ACELYRIN, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Madison Avenue Partners, LP | 13D | 5.10%5.09M shares | New | Apr 30, 20251 filing | Apr 30, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
15 Schedule 13D and 13G filings on ACELYRIN, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| May 27, 20258:56 AM ET | Trium Capital LLP | 13D/A | 0.00%0 shares | –Below 5% | May 23, 2025 | SEC |
| May 23, 20254:15 PM ET | Tang Capital Management LLCand 6 others | 13D/A | 0.00%0 shares | −8.80 ppfrom 8.80%Below 5% | May 21, 2025 | SEC |
| May 23, 20254:15 PM ET | AyurMaya Capital Management Company, LPand 1 other | 13G/A | 0.00%0 shares | –Below 5% | May 21, 2025 | SEC |
| May 23, 20254:01 PM ET | Access Industries Management, LLCand 3 others | 13D/A | 0.00%0 shares | −5.08 ppfrom 5.08%Below 5% | May 21, 2025 | SEC |
| Apr 30, 20258:27 PM ET | Madison Avenue Partners, LPand 5 others | 13D | 5.10%5.09M shares | New | Apr 29, 2025 | SEC |
| Apr 29, 20251:50 PM ET | Trium Capital LLP | 13D/A | – | – | Mar 6, 2025 | SEC |
| Mar 12, 20255:58 PM ET | Tang Capital Management LLCand 6 others | 13D/A | 8.80%8.82M shares | +1.50 ppfrom 7.30% | Mar 10, 2025 | SEC |
| Mar 7, 202512:49 PM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 4.60%4.65M shares | −8.20 ppfrom 12.80%Below 5% | Feb 28, 2025 | SEC |
| Mar 6, 202511:55 AM ET | Trium Capital LLP | 13D | 5.40%5.39M shares | New | Mar 6, 2025 | SEC |
| Feb 27, 20257:02 PM ET | Tang Capital Management LLCand 6 others | 13D/A | 7.30%7.30M shares | +2.00 ppfrom 5.30% | Feb 25, 2025 | SEC |
| Feb 20, 20254:15 PM ET | Tang Capital Management LLCand 6 others | 13D | 5.30%5.30M shares | New | Feb 18, 2025 | SEC |
| Feb 14, 20256:13 PM ET | Citadel Advisors LLCand 6 others | 13G/A | 4.20%4.22M shares | –Below 5% | Dec 31, 2024 | SEC |
| Feb 14, 20259:45 AM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 12.80%12.9M shares | – | Dec 31, 2024 | SEC |
| Feb 10, 20255:14 PM ET | Access Industries Management, LLCand 3 others | 13D/A | 5.08%5.10M shares | – | Feb 6, 2025 | SEC |
| Feb 10, 20254:08 PM ET | Integrated Core Strategies (US) LLCand 3 others | 13G/A | 4.70%4.71M shares | –Below 5% | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell ACELYRIN, Inc. shares.
No Form 144 notices for ACELYRIN, Inc. are on file.