Mountain Lake AcquisitionMLACRPreferred / convertible
13F holders, Q4 2025 (December 31)At the end of Q4 2025, 42 institutions reported holding Mountain Lake Acquisition Co. (MLACR) in their 13F filings, up 2 from Q3 2025. 7 opened new positions and 4 sold out. The largest holders were Harraden Circle Investments, LLC ($798K), Magnetar Financial LLC ($456K) and Polar Asset Management Partners Inc. ($451K). 2 famous investors held it, including David E. Shaw ( of D. E. Shaw & Co.'s portfolio) and Israel Englander ( of Millennium Management's portfolio).
- Company
- Mountain Lake Acquisition Co.
- CUSIP
- G6301B127
- Latest filing quarter
- Q1 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 7 | $538K |
| Exits | 4 | $85K |
All 13F filers, Q3 2025 → Q4 2025: 2,832,085 shares bought and 3,123,218 shares sold, net −291,133 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 42 holders
| Harraden Circle Investments, LLC | — | Add +9.1% | 3,325,766 | $798K |
| Magnetar Financial LLC | — | No change | 1,900,000 | $456K |
| Polar Asset Management Partners Inc. | — | No change | 1,880,000 | $451K |
| AQR Arbitrage LLC | — | Reduce -22.5% | 1,533,906 | $368K |
| Linden Advisors LP | — | No change | 1,175,000 | $306K |
| Meteora Capital, LLC | — | New | 1,014,266 | $243K |
| Alberta Investment Management Corp | — | No change | 980,000 | $235K |
| Toronto Dominion Bank | — | Add +68.3% | 756,800 | $182K |
| Verition Fund Management LLC | — | Reduce -26.8% | 728,224 | $175K |
| D. E. Shaw & Co. | — | No change | 725,000 | $174K |
| Westchester Capital Management, LLC | — | Reduce -13.1% | 700,013 | $168K |
| TENOR CAPITAL MANAGEMENT Co., L.P. | — | No change | 500,000 | $120K |
| Rivernorth Capital Management, LLC | — | No change | 500,000 | $120K |
| LMR Partners LLP | — | No change | 500,000 | $120K |
| Shaolin Capital Management LLC | — | Reduce -26.2% | 479,500 | $115K |
| Millennium Management | — | No change | 450,000 | $108K |
| BNP Paribas Financial Markets | — | New | 446,094 | $107K |
| Wolverine Asset Management LLC | — | Reduce -29.9% | 364,509 | $87K |
| CSS LLC | — | Add +27.5% | 35,056 | $84K |
| Saba Capital Management, L.P. | — | New | 350,017 | $84K |
| Hudson Bay Capital Management LP | — | Reduce -12.5% | 349,976 | $84K |
| DLD Asset Management, LP | — | New | 325,000 | $78K |
| Periscope Capital Inc. | — | Reduce -23.5% | 325,000 | $78K |
| Whitebox Advisors LLC | — | No change | 300,000 | $72K |
| Clear Street Group Inc. | — | Reduce -7.0% | 212,479 | $51K |
| Moore Capital Management, LP | — | No change | 200,000 | $48K |
| Wealthspring Capital LLC | — | No change | 150,570 | $36K |
| K2 Principal Fund, L.P. | — | Reduce -59.6% | 147,507 | $35K |
| Glazer Capital, LLC | — | No change | 143,986 | $35K |
| Schonfeld Strategic Advisors LLC | — | Reduce -10.8% | 115,898 | $28K |
| Picton Mahoney Asset Management | — | Reduce -60.0% | 100,000 | $24K |
| Mint Tower Capital Management B.V. | — | No change | 100,000 | $24K |
| Parallax Volatility Advisers, L.P. | — | Reduce -52.3% | 95,398 | $23K |
| Boothbay Fund Management, LLC | — | Add +142.3% | 72,683 | $17K |
| Decagon Asset Management LLP | — | Reduce -45.7% | 69,665 | $17K |
| Rangeley Capital, LLC | — | New | 15,000 | $16K |
| Quarry LP | — | Reduce -48.7% | 50,000 | $12K |
| HGC Investment Management Inc. | — | Reduce -94.3% | 40,000 | $10K |
| Readystate Asset Management LP | — | New | 24,779 | $6K |
| Susquehanna International Group, LLP | — | Add +36.1% | 20,009 | $5K |
| StoneX Group Inc. | — | New | 18,363 | $4K |
| Bank of America Corp. | — | Reduce -20.1% | 6,269 | $2K |
"% of holder's portfolio" is MLACR's weight in each manager's 13F, not the share of Mountain Lake Acquisition Co. the manager owns.