DOSSIER · 13F Holders · Q1 2026BellwetherCompounder

MOUNTAIN LAKE ACQUISITION CO

49 institutions still hold MOUNTAIN LAKE ACQUISITION CO as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP G6301B101·49 13F holders·last filed Mar 31, 2026

Market cap

—

▼ 3.1%

vs prior quarter

13F value held

$184M

56.0% inst. owned

of float

Holders

49

-105 QoQ

filers reporting

Activity

+73 / −49

+918 added · −739 reduced

this quarter

Concentration

11.47%

TENOR CAPITAL MANAGEMENT Co., L.P. #1

top holder share

AI Holders Summary · Q1 2026

49 institutions reported MOUNTAIN LAKE ACQUISITION CO in Q1 2026. TENOR CAPITAL MANAGEMENT Co., L.P. leads at 11.5% of the visible book. -105 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter

TENOR CAPITAL MANAGEMENT Co., L.P.

$21M2.0M0.32%Q1 2026 02

BERKLEY W R CORP

$20M1.9M1.06%Q1 2026 03

MIZUHO SECURITIES USA LLC

$18M1.7M0.42%Q1 2026 04

Polar Asset Management Partners Inc.

$16M1.5M0.31%Q1 2026 05

AQR Arbitrage LLC

$15M1.4M0.31%Q4 2025 06

First Trust Capital Management L.P.

$10M980K0.54%Q1 2026 07

Alberta Investment Management Corp

CIK 0001463559· Sovereign

$10M980K0.06%Q1 2026 08

WOLVERINE ASSET MANAGEMENT LLC

$10M972K0.10%Q1 2026 09

Westchester Capital Management, LLC

$9M888K0.42%Q1 2026 10

LINDEN ADVISORS LP

$9M875K0.05%Q1 2026 11

Karpus Management, Inc.

$7M620K0.20%Q1 2026 12

CoinFund Management LLC

$6M566K16.85%Q1 2026 13

RIVERNORTH CAPITAL MANAGEMENT, LLC

$5M500K0.26%Q1 2026 14

LMR Partners LLP

$5M497K0.01%Q1 2026 15

Crossingbridge Advisors, LLC

$5M442K0.84%Q1 2026 16

GOLDMAN SACHS GROUP INC

$4M424K0.00%Q1 2026 17

TORONTO DOMINION BANK

$4M350K0.01%Q1 2026 18

RLH Capital LLC

$3M313K1.67%Q1 2026 19

WHITEBOX ADVISORS LLC

$3M300K0.04%Q1 2026 20

Hudson Bay Capital Management LP

$3M260K0.01%Q1 2026

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