Ownership

Who owns Parabilis Medicines, 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).

Stakes over 5%

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.

ARCH Venture Fund XII, L.P., ARCH Venture Partners XII, L.P., ARCH Venture Partners XII, LLC August 14, 2026

ARCH Venture Fund XII, L.P.: 5.3% · 6,412,780 shares — ARCH Venture Partners XII, L.P.: 5.3% · 6,412,780 shares — ARCH Venture Partners XII, LLC: 5.3% · 6,412,780 shares

View filing (SCHEDULE 13G)

FMR LLC, Abigail P. Johnson August 06, 2026

FMR LLC: 8.5% · 10,292,735 shares — Abigail P. Johnson: 8.5% · 10,292,735 shares

View filing (SCHEDULE 13G)

1 more 5% stakes behind a free account

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Super investors holding PBLS

Every 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 Parabilis Medicines, Inc. they hold. Together these 79 managers report 342.35% of shares outstanding.

Investor	Position value	Shares	% of their portfolio	% of company	As of
RA CAPITAL MANAGEMENT, L.P.	$792M	28,933,371	6.88%	100.09%	June 30, 2026
FMR LLC	$282M	10,292,735	0.01%	35.60%	June 30, 2026

77 more institutional holders behind a free account

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Funds holding PBLS

Funds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 18 funds hold 15.70% 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	$30.7M	0.00%	3.88%	June 30, 2026
VANGUARD SMALL-CAP INDEX FUND	$22.1M	0.01%	2.79%	June 30, 2026

16 more funds behind a free account

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