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Disclosery

MLAC MOUNTAIN LAKE ACQUISITION CO

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Common (common)

46 managers (46 13F filers) reported a position in MLAC shares at 2025-09-30, 22,443,412 shares in all. 3 filers opened a position and 1 filer sold out during the quarter.

Managers
46
13F filers
46
New
3
Added
5
Reduced
10
Sold out
1
Shares held by filers
22,443,412

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Magnetar Financial LLCin group Magnetar Financial LLC1,900,000$19.6M0.12%013F-HRTimelineGroup
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC1,642,711$16.9M0.25%+89,25313F-HRTimelineGroup
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC1,499,906$15.4M0.39%-8,00013F-HRTimelineGroup
Polar Asset Management Partners Inc.1,480,000$15.2M0.31%013F-HR/ATimeline
Westchester Capital Management, LLCin group Westchester Capital Managemen…1,182,271$12.2M0.63%013F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.1,092,500$11.3M0.01%013F-HRTimelineGroup
First Trust Capital Management L.P.in group FIRST TRUST ADVISORS LP1,005,000$10.4M0.67%013F-HRTimelineGroup
Alberta Investment Management Corp980,000$10.1M0.07%013F-HR/ATimeline
Linden Advisors LPin group Linden Advisors LP875,000$9.03M0.06%013F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP761,250$7.84M0.01%013F-HRTimelineGroup
Governors Lane LP733,200$7.57M1.05%013F-HRTimeline
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…700,000$7.21M0.04%013F-HR/ATimelineGroup
HGC Investment Management Inc.700,000$7.21M1.76%013F-HRTimeline
Karpus Management, Inc.670,220$6.9M0.22%-54,10013F-HRTimeline
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC624,612$6.43M0.22%-3,38813F-HRTimelineGroup
Jain Global LLC500,000$5.16M0.07%013F-HRTimeline
TENOR CAPITAL MANAGEMENT Co., L.P.500,000$5.15M0.07%013F-HRTimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC500,000$5.15M0.29%new13F-HRTimeline
LMR Partners LLPin group LMR Partners LLP500,000$5.15M0.07%013F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC446,094$4.59M<0.01%013F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC427,587$4.4M<0.01%013F-HRTimelineGroup
Periscope Capital Inc.424,388$4.38M1.07%+74,38813F-HRTimeline
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC428,267$4.35M0.09%-21,74013F-HRTimelineGroup
WHITEBOX ADVISORS LLC300,000$3.09M0.06%013F-HRTimeline
OCONNOR, A Distinct Business Unit of UB…250,000$2.58M0.08%013F-HR/ATimelineThe filing omitted confidential holdings, a later amendment may add them.
PICTON MAHONEY ASSET MANAGEMENT250,000$2.58M0.03%013F-HRTimeline
BERKLEY W R CORP218,060$2.25M0.15%013F-HRTimeline
Verition Fund Management LLC205,349$2.12M0.01%+40513F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…199,600$2.06M0.01%013F-HRTimeline
MOORE CAPITAL MANAGEMENT, LP200,000$2.06M0.04%013F-HRTimeline
Radcliffe Capital Management, L.P.193,057$1.99M0.12%+96,20313F-HRTimeline
GRITSTONE ASSET MANAGEMENT LLC166,867$1.72M1.77%-2,44313F-HRTimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK156,647$1.61M<0.01%-49,80013F-HRTimelineGroup
Wealthspring Capital LLCin group Wealthspring Capital LLC150,570$1.55M0.37%-39013F-HRTimelineGroup
ARISTEIA CAPITAL, L.L.C.150,000$1.54M0.05%013F-HRTimeline
DLD Asset Management, LP100,000$1.03M0.13%-75,00013F-HR/ATimeline
Mint Tower Capital Management B.V.100,000$1.03M0.13%013F-HRTimeline
DELTEC ASSET MANAGEMENT LLC50,000$515K0.08%013F-HRTimeline
LANDSCAPE CAPITAL MANAGEMENT, L.L.C.in group LANDSCAPE CAPITAL MANAGEMENT,…43,320$446K0.03%-2,25613F-HRTimelineGroup
Wellspring Financial Advisors, LLC35,000$360K0.03%013F-HRTimeline
Schonfeld Strategic Advisors LLC29,998$310K<0.01%-50,00213F-HRTimeline
Rangeley Capital, LLC30,000$309K0.29%new13F-HRTimeline
Centiva Capital, LP25,100$259K0.02%013F-HRTimeline
UBS Group AGin group UBS Group AG12,890$133K<0.01%new13F-HRTimelineGroup
Clear Street Group Inc.in group Clear Street Group Inc.3,869$39.9K<0.01%13F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY79$814<0.01%+1513F-HR/ATimelineGroup