Who owns Septerna, 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.
RA Capital Management, L.P.: 11.8% · 5,525,324 shares — Peter Kolchinsky: 11.8% · 5,525,324 shares — Rajeev Shah: 11.8% · 5,525,324 shares
DRIEHAUS CAPITAL MANAGEMENT LLC: 9.8% · 4,433,058 shares
2 more 5% stakes behind a free account
See every investor who has disclosed crossing 5% of Septerna, Inc..
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 Septerna, Inc. they hold. Together these 188 managers report 112.15% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | $234M | 6,995,858 | 2.04% | 14.99% | June 30, 2026 |
| TRV GP V, LLC | $208M | 6,215,591 | 41.78% | 13.32% | June 30, 2026 |
186 more institutional holders behind a free account
See every manager reporting Septerna, Inc., how much of the company they hold, and how big the position is inside their own portfolio.
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 173 funds hold 14.08% 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 |
|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND | $31.1M | 0.00% | 1.99% | June 30, 2026 |
| PRIMECAP Odyssey Aggressive Growth Fund | $19.3M | 0.28% | 1.74% | April 30, 2026 |
171 more funds behind a free account
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