MLAA · Mountain Lake Acquisition Corp. II

$10.00 +0.00 (+0.00%) At close · Aug 21

Market Cap

$489.80M

48.98M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Quarter:

Holders: 70

Total Value: $323,491,686

Total Shares: 48,441,272

Institutional Ownership Trend

2 quarters

Holder Concentration

Across 70 13F filers · Δ vs Mar 31, 2026

Top Holder

6.7%

+0.0 pts

Top 5

29.3%

+0.3 pts

Top 10

48.8%

+1.6 pts

HHI

349

Broadly held+22

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +9

Institutional value: -0.5%

Shares held: +17.9%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mid HIGHBRIDGE CAPITAL MANAGEMENT LLC	+1,554,185	1,831,188
Mid ARISTEIA CAPITAL, L.L.C.	+1,097,713	3,284,107
Mid Alberta Investment Management Corp	+875,000	2,625,000
Mid AQR Arbitrage LLC	+757,967	2,173,623
Mega D. E. Shaw & Co., Inc.	+754,999	1,242,500

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	−1,250,000	625,000
Large Verition Fund Management LLC	−517,762	1,144,174
Small Shaolin Capital Management LLC	−458,763	647,186
Large ADAGE CAPITAL PARTNERS GP, L.L.C.	−350,000	2,800,000
Mid Magnetar Financial LLC	−225,000	2,775,000

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mid Kryger Capital LLC	1,270,887	$12,619,907
Mid Fort Baker Capital Management LP	1,023,500	$9,930,000
Small Rangeley Capital, LLC	127,791	$1,268,964
Mid MIZUHO SECURITIES USA LLC	125,405	$1,245,271
Large READYSTATE ASSET MANAGEMENT LP	225,736	$1,241,250

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Large Calamos Advisors LLC	783,000	$7,775,190
Small DELTEC ASSET MANAGEMENT LLC	70,000	$492,500
Small ABC ARBITRAGE SA	40,000	$397,200
Mega ROYAL BANK OF CANADA	17,900	$145,780

Filter: New 13 Increased 24 Reduced 20 Sold out 4 Unchanged 13

Showing 100 of 115

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

ARISTEIA CAPITAL, L.L.C.

$21,740,791

6.72%

2,189,405

ADAGE CAPITAL PARTNERS GP, L.L.C.

$20,853,000

6.45%

2,100,000

Magnetar Financial LLC

$19,860,000

6.14%

2,000,000

Alberta Investment Management Corp

$17,377,500

5.37%

1,750,000

Linden Advisors LP

$14,895,000

4.60%

1,500,000

AQR Arbitrage LLC

$14,389,384

4.45%

1,449,082

HIGHBRIDGE CAPITAL MANAGEMENT LLC

$13,002,927

4.02%

1,309,459

Kryger Capital LLC

$12,619,907

3.90%

1,270,887

LMR Partners LLP

$12,412,500

3.84%

1,250,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
LMR PARTNERS (DIFC) Ltd	1,250,000	$12,412,500	100.0%	Sole

D. E. Shaw & Co., Inc.

$10,724,400

3.32%

1,080,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
D. E. SHAW & CO, L.P.	1,080,000	$10,724,400	100.0%	Defined

TENOR CAPITAL MANAGEMENT Co., L.P.

$10,521,708

3.25%

1,059,588

SONA ASSET MANAGEMENT (US) LLC

$9,930,000

3.07%

1,000,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SONA ASSET MANAGEMENT (UK) LLP	1,000,000	$9,930,000	100.0%	Other

Fort Baker Capital Management LP

$9,930,000

3.07%

1,000,000

GLAZER CAPITAL, LLC

$9,433,500

2.92%

950,000

Westchester Capital Management, LLC

$8,475,423

2.62%

853,517

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WESTCHESTER CAPITAL PARTNERS, LLC	7,467	$74,147	0.9%	Sole
Virtus Investment Advisers, LLC	773,011	$7,675,999	90.6%	Other
Held directly	73,039	$725,277	8.6%	Sole

Polar Asset Management Partners Inc.

$7,944,000

2.46%

800,000

MILLENNIUM MANAGEMENT LLC

$7,596,450

2.35%

765,000

BNP PARIBAS ARBITRAGE, SA

$7,377,572

2.28%

742,958

First Trust Capital Management L.P.

$5,958,000

1.84%

600,000

Verition Fund Management LLC

$5,834,768

1.80%

587,590

TWO SIGMA INVESTMENTS, LP

$5,637,012

1.74%

567,675

MOORE CAPITAL MANAGEMENT, LP

$4,965,000

1.53%

500,000

MMCAP International Inc. SPC

$4,965,000

1.53%

500,000

PICTON MAHONEY ASSET MANAGEMENT

$4,965,000

1.53%

500,000

RIVERNORTH CAPITAL MANAGEMENT, LLC

$4,960,342

1.53%

499,531

Radcliffe Capital Management, L.P.

$4,549,091

1.41%

458,116

BERKLEY W R CORP

$4,446,594

1.37%

447,794

Shaolin Capital Management LLC

$4,255,372

1.32%

428,537

Sculptor Capital LP

$4,245,392

1.31%

427,532

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Sculptor Capital II LP joint	427,532	$4,245,392	100.0%	Sole

WHITEBOX ADVISORS LLC

$3,972,000

1.23%

400,000

WOLVERINE ASSET MANAGEMENT LLC

$3,900,285

1.21%

392,778

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Wolverine Holdings, LLC	392,778	$3,900,285	100.0%	Defined

Ghisallo Capital Management LLC

$3,723,750

1.15%

375,000

Periscope Capital Inc.

$3,475,500

1.07%

350,000

Wealthspring Capital LLC

$3,341,246

1.03%

336,480

Lineage Point Capital LP

$2,921,545

0.90%

294,214

Mint Tower Capital Management B.V.

$2,482,500

0.77%

250,000

Schonfeld Strategic Advisors LLC

$2,333,550

0.72%

235,000

COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS

$1,986,000

0.61%

200,000

RLH Capital LLC

$1,489,500

0.46%

150,000

Rangeley Capital, LLC

$1,268,964

0.39%

127,791

MIZUHO SECURITIES USA LLC

$1,245,271

0.38%

125,405

READYSTATE ASSET MANAGEMENT LP

$1,241,250

0.38%

125,000

CSS LLC/IL

$1,037,694

0.32%

104,501

HGC Investment Management Inc.

$993,000

0.31%

100,000

DLD Asset Management, LP

$993,000

0.31%

100,000

Quarry LP

$747,063

0.23%

75,233

Hudson Bay Capital Management LP

$496,500

0.15%

50,000

Centiva Capital, LP

$414,845

0.13%

41,777

Virtu Financial LLC

$361,342

0.11%

36,389

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Virtu Americas LLC	36,389	$361,342	100.0%	Defined

Cable Car Capital, LP

$297,900

0.09%

30,000

Clear Street Group Inc.

$250,315

0.08%

25,208

PenderFund Capital Management Ltd.

$232,362

0.07%

23,400

CITADEL ADVISORS LLC

$159,465

0.05%

16,059

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	16,059	$159,465	100.0%	Defined

METEORA CAPITAL, LLC

$124,442

0.04%

12,532

TrueMark Investments, LLC

$109,537

0.03%

11,031

Arax Advisory Partners

$14,895

0.00%

1,500

JPMORGAN CHASE & CO

$12,104

0.00%

1,219

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
J.P. Morgan Securities LLC	1,219	$12,104	100.0%	Defined

MORGAN STANLEY

$228

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY CAPITAL SERVICES, LLC	23	$228	100.0%	Defined

Schonfeld Strategic Advisors LLC MLAAW

—

75,000

MOORE CAPITAL MANAGEMENT, LP MLAAW

—

250,000

AQR Arbitrage LLC MLAAW

—

724,541

Alberta Investment Management Corp MLAAW

—

875,000

Centiva Capital, LP MLAAW

—

95,000

Radcliffe Capital Management, L.P. MLAAW

—

251,890

Clear Street Group Inc. MLAAU

—

118,425

RLH Capital LLC MLAAW

—

75,000

RIVERNORTH CAPITAL MANAGEMENT, LLC MLAAW

—

250,000

ADAGE CAPITAL PARTNERS GP, L.L.C. MLAAW

—

700,000

Verition Fund Management LLC MLAAW

—

556,584

MILLENNIUM MANAGEMENT LLC MLAAW

—

318,100

BNP PARIBAS ARBITRAGE, SA MLAAW

—

371,479

CSS LLC/IL MLAAW

—

78,118

Lineage Point Capital LP MLAAW

—

648,472

MMCAP International Inc. SPC MLAAW

—

250,000

Cable Car Capital, LP MLAAW

—

15,000

Quarry LP MLAAW

—

37,500

Linden Advisors LP MLAAW

—

749,999

SONA ASSET MANAGEMENT (US) LLC MLAAW

—

500,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SONA ASSET MANAGEMENT (UK) LLP	500,000	$0	—	Other

Fort Baker Capital Management LP MLAAW

—

23,500

READYSTATE ASSET MANAGEMENT LP MLAAW

—

100,736

Polar Asset Management Partners Inc. MLAAW

—

500,000

BOOTHBAY FUND MANAGEMENT, LLC MLAAW

—

90,550

HGC Investment Management Inc. MLAAW

—

88,352

TENOR CAPITAL MANAGEMENT Co., L.P. MLAAW

—

529,794

LMR Partners LLP MLAAW

—

625,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
LMR PARTNERS (DIFC) Ltd	625,000	$0	—	Sole

Walleye Capital LLC MLAAW

—

75,000

Shaolin Capital Management LLC MLAAW

—

218,649

PICTON MAHONEY ASSET MANAGEMENT MLAAW

—

250,000

GLAZER CAPITAL, LLC MLAAW

—

350,000

OMERS ADMINISTRATION Corp MLAAU

—

626,400

Qube Research & Technologies Ltd MLAAU

—

250,000

D. E. Shaw & Co., Inc. MLAAW

—

162,500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
D. E. SHAW & CO, L.P.	162,500	$0	—	Defined

TORONTO DOMINION BANK MLAAW

—

119,104

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TD SECURITIES (USA) LLC	119,104	$0	—	Defined

Clear Street Group Inc. MLAAW

—

44,387

METEORA CAPITAL, LLC MLAAW

—

95,000

TUDOR INVESTMENT CORP ET AL MLAAU

—

300,000

Sculptor Capital LP MLAAW

—

52,179

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Sculptor Capital II LP joint	52,179	$0	—	Sole

WHITEBOX ADVISORS LLC MLAAW

—

200,000

UBS Group AG MLAAU

—

240

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Securities LLC	240	$0	—	Defined

Galaxy Digital Inc. MLAAW

—

50,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Galaxy Digital LLC joint	50,000	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TD SECURITIES (USA) LLC	166,060	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WESTCHESTER CAPITAL PARTNERS, LLC	2,726	$0	—	Sole
Virtus Investment Advisers, LLC	278,494	$0	—	Other
Held directly	26,041	$0	—	Sole

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Securities LLC	9,665	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Wolverine Holdings, LLC	115,302	$0	—	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
ABC ARBITRAGE ASSET MANAGEMENT joint	40,000	$397,200	100.0%	Other

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC CMA LTD.	14,800	$145,780	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC CMA LTD.	3,100	$0	—	Defined

Key facts CIK 2094265 CUSIP G6301L109 13F (30d) 67 filings 67 filers