Mountain Lake Acquisition-AMLAC
13F holders, Q1 2026 (March 31)At the end of Q1 2026, 47 institutions reported holding Mountain Lake Acquisition-A (MLAC) in their 13F filings, down 1 from Q4 2025. 3 opened new positions and 5 sold out. The largest holders were TENOR CAPITAL MANAGEMENT Co., L.P. ($21.1M), Magnetar Financial LLC ($20.0M) and Berkley W R Corp. ($19.8M). 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 Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 3 | $5.0M |
| Exits | 5 | $24.9M |
All 13F filers, Q4 2025 → Q1 2026: 3,053,967 shares bought and 3,037,116 shares sold, net +16,851 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 47 holders
| TENOR CAPITAL MANAGEMENT Co., L.P. | 1.42% | No change | 2,000,000 | $21.1M |
| Magnetar Financial LLC | 0.22% | No change | 1,900,000 | $20.0M |
| Berkley W R Corp. | 1.06% | Add +418.0% | 1,877,833 | $19.8M |
| Mizuho Securities USA LLC | 0.42% | Add +78.6% | 1,710,141 | $18.0M |
| Polar Asset Management Partners Inc. | 0.51% | Add +1.2% | 1,497,259 | $15.8M |
| AQR Arbitrage LLC | 0.29% | Add +0.0% | 1,405,969 | $14.8M |
| First Trust Capital Management L.P. | 0.54% | No change | 980,393 | $10.3M |
| Alberta Investment Management Corp | 0.07% | No change | 980,000 | $10.3M |
| Wolverine Asset Management LLC | 0.54% | Add +0.9% | 971,757 | $10.2M |
| Westchester Capital Management, LLC | 0.45% | No change | 887,700 | $9.3M |
| Linden Advisors LP | 0.53% | No change | 875,000 | $9.2M |
| Glazer Capital, LLC | 0.20% | Add +24.8% | 856,946 | $9.0M |
| Karpus Management, Inc. | 0.20% | No change | 620,220 | $6.5M |
| CoinFund Management LLC | 17.51% | Add +22.8% | 566,000 | $6.0M |
| Rivernorth Capital Management, LLC | 0.26% | No change | 500,000 | $5.3M |
| LMR Partners LLP | 0.06% | No change | 496,989 | $5.2M |
| Crossingbridge Advisors, LLC | 0.95% | New | 442,460 | $4.7M |
| Goldman Sachs Group Inc. | 0.00% | No change | 424,430 | $4.5M |
| Toronto Dominion Bank | 0.01% | Reduce -8.8% | 350,000 | $3.7M |
| RLH Capital LLC | 1.68% | — | 312,540 | $3.3M |
| Whitebox Advisors LLC | 0.17% | No change | 300,000 | $3.2M |
| Hudson Bay Capital Management LP | 0.02% | No change | 260,429 | $2.7M |
| Shaolin Capital Management LLC | 0.23% | Reduce -50.0% | 200,000 | $2.1M |
| Moore Capital Management, LP | 0.08% | No change | 200,000 | $2.1M |
| Jain Global LLC | 0.03% | Reduce -47.6% | 196,786 | $2.1M |
| D. E. Shaw & Co. | 0.00% | No change | 193,702 | $2.0M |
| Radcliffe Capital Management, L.P. | 0.23% | No change | 193,057 | $2.0M |
| Ghisallo Capital Management LLC | 0.06% | No change | 200,000 | $2.0M |
| L1 Global Manager Pty Ltd | 1.45% | No change | 170,000 | $1.8M |
| Quarry LP | 0.35% | Add +8.4% | 162,540 | $1.7M |
| Aristeia Capital, L.L.C. | 0.06% | No change | 150,000 | $1.6M |
| Picton Mahoney Asset Management | 0.02% | No change | 150,000 | $1.6M |
| O'Connor Alternative Investments LLC | 0.09% | — | 149,912 | $1.6M |
| Millennium Management | 0.00% | Reduce -12.0% | 147,302 | $1.6M |
| Periscope Capital Inc. | 0.24% | Reduce -50.0% | 125,000 | $1.3M |
| DLD Asset Management, LP | 0.40% | No change | 124,750 | $1.3M |
| UBS Group AG | 0.00% | Reduce -42.4% | 120,502 | $1.3M |
| Feynman Point Asset Management LLC | 3.64% | No change | 100,000 | $1.1M |
| Mint Tower Capital Management B.V. | 0.23% | No change | 100,000 | $1.1M |
| JPMorgan Chase & Co. | 0.00% | Add +0.1% | 49,916 | $526K |
| Deltec Asset Management LLC | 0.08% | No change | 40,000 | $421K |
| Clear Street Group Inc. | 0.00% | No change | 36,699 | $386K |
| Wellspring Financial Advisors, LLC | 0.03% | No change | 35,000 | $369K |
| Rangeley Capital, LLC | 0.17% | New | 15,000 | $158K |
| Schonfeld Strategic Advisors LLC | 0.00% | New | 14,623 | $154K |
| Hara Capital LLC | 0.01% | No change | 1,250 | $13K |
| Morgan Stanley | 0.00% | Reduce -25.5% | 70 | $737 |
"% of holder's portfolio" is MLAC's weight in each manager's 13F, not the share of Mountain Lake Acquisition-A the manager owns.