Mountain Lake Acquisition Corp. II

MLAAU

Exchange: Nasdaq
Industry: Blank Checks
SEC CIK: 0002094265

SEC filings (opens in a new tab)

No open-market purchases or sales by Mountain Lake Acquisition Corp. II insiders were filed in the last 90 days; 9 institutions reported holding it in 13F filings for Q2 2026, worth $23.0M in total; no superinvestor holds it.

Other share classesMLAA MLAAW

Q1 2026 vs. Q4 2025

How the institutions holding Mountain Lake Acquisition Corp. II changed between Q4 2025 and Q1 2026.

All holders in Q1 2026 All holders in Q4 2025

13F holders of MLAAU: Q4 2025 compared with Q1 2026
Measure	Q4 2025	Q1 2026	Change
Holders	0	32	+32
Shares	0	16.0M	+16.0M
Value	$0	$158.6M	+$158.6M

New holders (32)

Institutions that held Mountain Lake Acquisition Corp. II at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to MLAAU in Q1 2026
Institution	Shares	Value	% of portfolio
Aristeia Capital LLC	2,186,394	$21.7M	0.50%
Alberta Investment Management Corp	1,750,000	$17.4M	0.11%
CNH Partners LLC	1,415,656	$14.1M	0.23%
LMR Partners LLP	1,250,000	$12.4M	0.11%
Calamos Advisors LLC	783,000	$7.78M	0.03%
Millennium Management LLC	764,983	$7.60M	0.01%
BNP Paribas Arbitrage, SA	742,960	$7.38M	0.00%
Omers Administration Corp	626,400	$6.22M	0.04%
Westchester Capital Management, LLC	614,526	$6.10M	0.30%
Vivaldi Asset Management, LLC	600,000	$5.96M	0.31%
MMCAP International Inc. SPC	500,000	$4.96M	0.43%
Rivernorth Capital Management, LLC	500,000	$4.96M	0.25%
Moore Capital Management, LP	500,000	$4.96M	0.18%
Picton Mahoney Asset Management	500,000	$4.96M	0.05%
Toronto Dominion Bank	410,570	$4.08M	0.01%
Schonfeld Strategic Advisors LLC	340,000	$3.38M	0.03%
Wealthspring Capital LLC	338,050	$3.36M	0.80%
Sculptor Capital LP	313,025	$3.11M	0.04%
Lineage Point Capital LP	300,000	$2.98M	0.73%
Tudor Investment Corp Et Al	300,000	$2.98M	0.02%
Wolverine Asset Management LLC	275,000	$2.73M	0.04%
Qube Research & Technologies Ltd	250,000	$2.48M	0.00%
Commonwealth of Pennsylvania Public School Empls Retrmt Sys	200,000	$1.99M	0.01%
RLH Capital LLC	150,000	$1.49M	0.76%
Centiva Capital, LP	150,000	$1.49M	0.07%
Quarry LP	75,000	$745.5K	0.15%
Abc Arbitrage SA	40,000	$397.2K	0.05%
Cable Car Capital LLC	30,000	$297.9K	0.10%
HRT Financial LP	28,446	$282.0K	0.00%
Clear Street Group Inc.	20,935	$207.9K	0.00%
TrueMark Investments, LLC	11,500	$114.2K	0.02%
Longfellow Investment Management Co LLC	8,414	$83.6K	0.02%

Sold out (0)

Institutions that held Mountain Lake Acquisition Corp. II at the end of Q4 2025 and filed for Q1 2026 without it.

None.