Mountain Lake Acquisition-AMLAC
13F holders, Q3 2025 (September 30)At the end of Q3 2025, 46 institutions reported holding Mountain Lake Acquisition-A (MLAC) in their 13F filings, up 2 from Q2 2025. 3 opened new positions and 1 sold out. The largest holders were Magnetar Financial LLC ($19.6M), Wolverine Asset Management LLC ($16.9M) and AQR Arbitrage LLC ($15.4M). 2 famous investors held it, including David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Mountain Lake Acquisition-A
- CUSIP
- G6301B101
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 3 | $5.6M |
| Exits | 1 | $165K |
All 13F filers, Q2 2025 → Q3 2025: 803,154 shares bought and 283,155 shares sold, net +519,999 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 46 holders
| Magnetar Financial LLC | 0.13% | No change | 1,900,000 | $19.6M |
| Wolverine Asset Management LLC | 1.19% | Add +5.8% | 1,642,711 | $16.9M |
| AQR Arbitrage LLC | 0.55% | Reduce -0.5% | 1,499,906 | $15.4M |
| Polar Asset Management Partners Inc. | 0.45% | No change | 1,480,000 | $15.2M |
| Westchester Capital Management, LLC | 0.63% | No change | 1,182,271 | $12.2M |
| D. E. Shaw & Co. | 0.01% | No change | 1,092,500 | $11.3M |
| First Trust Capital Management L.P. | 0.67% | No change | 1,005,000 | $10.4M |
| Alberta Investment Management Corp | 0.08% | No change | 980,000 | $10.1M |
| Linden Advisors LP | 0.86% | No change | 875,000 | $9.0M |
| Two Sigma Investments, LP | 0.01% | No change | 761,250 | $7.8M |
| Governors Lane LP | 1.06% | No change | 733,200 | $7.6M |
| HGC Investment Management Inc. | 1.77% | No change | 700,000 | $7.2M |
| Hudson Bay Capital Management LP | 0.05% | No change | 700,000 | $7.2M |
| Karpus Management, Inc. | 0.22% | Reduce -7.5% | 670,220 | $6.9M |
| Glazer Capital, LLC | 0.24% | Reduce -0.5% | 624,612 | $6.4M |
| Jain Global LLC | 0.07% | No change | 500,000 | $5.2M |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 0.56% | No change | 500,000 | $5.2M |
| Rivernorth Capital Management, LLC | 0.30% | New | 500,000 | $5.2M |
| LMR Partners LLP | 0.10% | No change | 500,000 | $5.2M |
| Goldman Sachs Group Inc. | 0.00% | No change | 446,094 | $4.6M |
| Millennium Management | 0.00% | No change | 427,587 | $4.4M |
| Periscope Capital Inc. | 1.11% | Add +21.3% | 424,388 | $4.4M |
| Mizuho Securities USA LLC | 0.09% | Reduce -4.8% | 428,267 | $4.3M |
| Whitebox Advisors LLC | 0.20% | No change | 300,000 | $3.1M |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | 0.08% | No change | 250,000 | $2.6M |
| Picton Mahoney Asset Management | 0.03% | No change | 250,000 | $2.6M |
| Berkley W R Corp. | 0.15% | No change | 218,060 | $2.2M |
| Verition Fund Management LLC | 0.01% | Add +0.2% | 205,349 | $2.1M |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | 0.01% | No change | 199,600 | $2.1M |
| Moore Capital Management, LP | 0.04% | No change | 200,000 | $2.1M |
| Radcliffe Capital Management, L.P. | 0.41% | Add +99.3% | 193,057 | $2.0M |
| Gritstone Asset Management LLC | 1.81% | Reduce -1.4% | 166,867 | $1.7M |
| Toronto Dominion Bank | 0.00% | Reduce -24.1% | 156,647 | $1.6M |
| Wealthspring Capital LLC | 0.38% | Reduce -0.3% | 150,570 | $1.6M |
| Aristeia Capital, L.L.C. | 0.08% | No change | 150,000 | $1.5M |
| DLD Asset Management, LP | 0.43% | Reduce -42.9% | 100,000 | $1.0M |
| Mint Tower Capital Management B.V. | 0.25% | No change | 100,000 | $1.0M |
| Deltec Asset Management LLC | 0.09% | No change | 50,000 | $515K |
| Landscape Capital Management, L.L.C. | 0.03% | Reduce -5.0% | 43,320 | $446K |
| Wellspring Financial Advisors, LLC | 0.03% | No change | 35,000 | $361K |
| Schonfeld Strategic Advisors LLC | 0.00% | Reduce -62.5% | 29,998 | $310K |
| Rangeley Capital, LLC | 0.30% | New | 30,000 | $309K |
| Centiva Capital, LP | 0.02% | No change | 25,100 | $259K |
| UBS Group AG | 0.00% | New | 12,890 | $133K |
| Clear Street Group Inc. | 0.00% | — | 3,869 | $40K |
| Morgan Stanley | 0.00% | Add +23.4% | 79 | $814 |
"% of holder's portfolio" is MLAC's weight in each manager's 13F, not the share of Mountain Lake Acquisition-A the manager owns.