ACELYRIN, Inc.

SLRNDelisted May 21, 2025

Industry: Pharmaceutical Preparations
SEC CIK: 0001962918

SEC filings (opens in a new tab)

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.

Q3 2024 vs. Q2 2024

How the institutions holding ACELYRIN, Inc. changed between Q2 2024 and Q3 2024.

All holders in Q3 2024 All holders in Q2 2024

13F holders of SLRN: Q2 2024 compared with Q3 2024
Measure	Q2 2024	Of which not filed for Q3 2024	Q3 2024	Change
Holders	113	2	122	+11
Shares	87.0M	5.43M	87.2M	+5.66M (+6.9%)
Value	$383.7M	$23.9M	$430.2M	+$70.4M (+19.6%)

2 institutions that held it in Q2 2024 haven't filed for Q3 2024 yet. Not filing isn't selling, so the changes leave them out.

New holders (23)

Institutions that held ACELYRIN, Inc. at the end of Q3 2024 but not at the end of Q2 2024.

Institutions new to SLRN in Q3 2024
Institution	Shares	Value	% of portfolio
BlackRock, Inc.	5,982,374	$29.5M	0.00%
Siren, L.L.C.	1,729,665	$8.53M	0.43%
StemPoint Capital LP	1,317,854	$6.50M	1.95%
Acuta Capital Partners, LLC	364,000	$1.79M	1.45%
Hudson Bay Capital Management LP	200,000	$986.0K	0.01%
TD Asset Management Inc	174,380	$859.7K	0.00%
Bank of Montreal	148,635	$732.8K	0.00%
Martingale Asset Management L P	98,284	$484.5K	0.01%
Artia Global Partners LP	93,114	$459.1K	0.13%
Algert Global LLC	64,830	$319.6K	0.01%
Tudor Investment Corp Et Al	48,391	$238.6K	0.00%
Virtus Investment Advisers, Inc.	35,700	$176.0K	0.14%
AJOVista, LLC	35,084	$173.0K	0.74%
American Century Companies Inc	32,066	$158.1K	0.00%
Simplex Trading, LLC	19,200	$94.0K	0.00%
Group One Trading, L.P.	15,619	$77.0K	0.00%
Intech Investment Management LLC	15,547	$76.6K	0.00%
Man Group plc	13,615	$67.1K	0.00%
SEI Investments Co	10,782	$53.2K	0.00%
HighTower Advisors, LLC	10,228	$50.0K	0.00%
Virtu Financial LLC	10,080	$50.0K	0.00%
Sterling Capital Management LLC	232	$1.14K	0.00%
Capital Performance Advisors LLP	102	$503	0.00%

Sold out (12)

Institutions that held ACELYRIN, Inc. at the end of Q2 2024 and filed for Q3 2024 without it.

Institutions that sold out of SLRN in Q3 2024
Institution	Shares, Q2 2024	Value, Q2 2024
Artal Group S.A.	2,020,888	$8.91M
ExodusPoint Capital Management, LP	189,578	$836.0K
Two Sigma Investments, LP	123,470	$544.5K
Dynamic Technology Lab Private Ltd	60,330	$266.0K
XTX Topco Ltd	43,300	$191.0K
EntryPoint Capital, LLC	25,830	$113.9K
Ghisallo Capital Management LLC	17,500	$77.2K
Sherbrooke Park Advisers LLC	16,839	$74.3K
Oxford Asset Management LLP	12,276	$54.1K
Principal Financial Group Inc	11,038	$48.7K
Catalyst Funds Management Pty Ltd	1,000	$4.41K
Redwood Wealth Management Group, LLC	1,000	$4.41K

Not filed for Q3 2024 yet (2)

Institutions that held ACELYRIN, Inc. at the end of Q2 2024 and haven't filed a 13F for Q3 2024. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding SLRN in Q2 2024 that haven't filed for Q3 2024
Institution	Shares, Q2 2024	Value, Q2 2024
BlackRock Inc.	5,269,374	$23.2M
Susquehanna Fundamental Investments, LLC	160,167	$706.3K