Who owns ACELYRIN, Inc., from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).
Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.
Trium Capital LLP: 0.0% · 0 shares
AyurMaya Capital Management Company, LP: 0.0% · 0 shares — David E. Goel: 0.0% · 0 shares
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Sign up freeEvery institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of ACELYRIN, Inc. they hold. Together these 108 managers report 73.23% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| TANG CAPITAL MANAGEMENT LLC | $24.3M | 9,818,115 | 1.34% | 9.73% | March 31, 2025 |
| AyurMaya Capital Management Company, LP | $23.1M | 9,334,735 | 26.08% | 9.25% | March 31, 2025 |
106 more institutional holders behind a free account
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Sign up freeFunds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 154 funds hold 20.94% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.
| Fund | Position value | % of net assets | % of company | As of |
|---|---|---|---|---|
| T. Rowe Price Small-Cap Stock Fund, Inc. | $11.4M | 0.13% | 3.59% | December 31, 2024 |
| T. Rowe Price Small-Cap Value Fund, Inc. | $7M | 0.07% | 2.81% | March 31, 2025 |
152 more funds behind a free account
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