$MLAA

$10.02 +$0.01 (0.1%) Close

$MLAA Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 10.4M shares outstanding

Who owns MLAA?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 477.5%

Douglas Horlick 119.9% · Paul Grinberg 119.9%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

+5 vs last qtr

Net shares bought

+2.0M

by institutions in Q2 2026

New / sold out

11 / 6

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Kryger Capital LLC NEW +1.3M
Highbridge Capital Management LLC +1.0M

Biggest sellers in Q2 2026

Healthcare Of Ontario Pension Plan Trust Fund SOLD OUT −1.3M
Verition Fund Management LLC −312.4K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Mountain Lake Acquisition Corp II in the last 12 months.

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for Mountain Lake Acquisition Corp II.

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years0% Under 1 year100%

Quarterly turnover

12.6%

of institutional shares changed hands

Top 10 managers, median time held

1 quarter

Super Investors

Investment managers reporting MLAA on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
AC Aristeia Capital, L.L.C.	2.2M	20.97%	+3.0K (+0.1%)	Q1 '26	0.3%
Shares held by quarter Peak holding2.2M (Q2'26) Change over 8 quarters+2.2M Share of the company20.970% Aristeia Capital, L.L.C.'s full portfolio →
AC Adage Capital Partners GP, L.L.C.	2.1M	20.11%	Unchanged	Q1 '26	0.0%
Shares held by quarter Peak holding2.1M (Q1'26) Change over 8 quarters+2.1M Share of the company20.110% Adage Capital Partners GP, L.L.C.'s full portfolio →

Aristeia Capital, L.L.C.

2.2M

% of company

20.97%

Change vs last qtr

+3.0K (+0.1%)

Held since

Q1 '26

Adage Capital Partners GP, L.L.C.

2.1M

% of company

20.11%

Change vs last qtr

Unchanged

Held since

Q1 '26

28 more super investors behind a free account

See every manager holding Mountain Lake Acquisition Corp II, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting MLAA on Form N-PORT; together they hold 8.0% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
FT First Trust Merger Arbitrage Fund Investment Managers Series Trust II	$5.12M	515.3K	4.94%	0.31%	June 30, 2026
RO RiverNorth Opportunities Fund Inc. Rivernorth Opportunities Fund Inc.	$993K	100.0K	0.96%	0.30%	June 30, 2026

First Trust Merger Arbitrage Fund

Investment Managers Series Trust II

Position value

$5.12M

% of company

4.94%

% of the fund

0.31%

As of

June 30, 2026

RiverNorth Opportunities Fund Inc.

Rivernorth Opportunities Fund Inc.

Position value

$993K

% of company

0.96%

% of the fund

0.30%

As of

June 30, 2026

4 more funds behind a free account

See every fund holding Mountain Lake Acquisition Corp II and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
DH Douglas Horlick 5%+ holder 13D · 25.6%	12.5M	119.89%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company119.890% Disclosed stake13D · 25.6% View the 13D/G filing →
PG Paul Grinberg 5%+ holder 13D · 25.6%	12.5M	119.89%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company119.890% Disclosed stake13D · 25.6% View the 13D/G filing →

Douglas Horlick

5%+ holder13D · 25.6%

12.5M

% of company

119.89%

Change vs last qtr

—

Held since

—

Paul Grinberg

5%+ holder13D · 25.6%

12.5M

% of company

119.89%

Change vs last qtr

—

Held since

—

1 more holders behind a free account

See every insider and 5%+ holder of Mountain Lake Acquisition Corp II.

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