Ownership

Who owns Aperture AC, 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.

Polar Asset Management Partners Inc. August 14, 2026

Polar Asset Management Partners Inc.: 7.5% · 825,000 shares

View filing (SCHEDULE 13G)

Highbridge Capital Management, LLC August 14, 2026

Highbridge Capital Management, LLC: 7.8% · 855,000 shares

View filing (SCHEDULE 13G)

5 more 5% stakes behind a free account

See every investor who has disclosed crossing 5% of Aperture AC.

Super investors holding APUR

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 Aperture AC they hold. Together these 31 managers report 279.35% of shares outstanding.

Investor	Position value	Shares	% of their portfolio	% of company	As of
MIZUHO SECURITIES USA LLC	$9.31M	945,000	0.09%	28.39%	June 30, 2026
HIGHBRIDGE CAPITAL MANAGEMENT LLC	$8.48M	855,000	0.21%	25.69%	June 30, 2026

29 more institutional holders behind a free account

See every manager reporting Aperture AC, how much of the company they hold, and how big the position is inside their own portfolio.

Funds holding APUR

Funds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 1 funds hold 0.30% 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
Rivernorth Enhanced Pre-Merger SPAC ETF	$99K	1.39%	0.30%	June 30, 2026