Who owns Mountain Lake Acquisition (MLAC)
Which tracked institutional funds hold MLAC, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MLAC company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-08-17). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on MLAC is one-sided between 2026-Q1 and 2026-Q2: 9 added or opened and 51 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
MLAC’s largest tracked holder by dollar value, Harraden Circle Investments, LLC, sizes it at 6.8% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 6.7pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in MLAC divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 67 tracked filers holding MLAC, 13 increased or opened the position and 59 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in MLAC between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 2
- Kryger Capital LLC$13M
- Fort Baker Capital Management LP$10M
Full exits 15
- Harraden Circle Investments, LLC$865M
- TENOR CAPITAL MANAGEMENT Co., L.P.$230M
- METEORA CAPITAL, LLC$215M
- GLAZER CAPITAL, LLC$19M
- Decagon Asset Management LLP$18M
- Karpus Management, Inc.$7M
Largest adds
- HIGHBRIDGE CAPITAL MANAGEMENT LLC$10M
- D. E. Shaw & Co., Inc.$5M
- READYSTATE ASSET MANAGEMENT LP$1M
- MIZUHO SECURITIES USA LLC$1M
- Sculptor Capital LP$1M
- Rangeley Capital, LLC$1M
Largest trims
- Magnetar Financial LLC$20M
- BERKLEY W R CORP$20M
- Polar Asset Management Partners Inc.$18M
- AQR Arbitrage LLC$15M
- HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND$12M
- Alberta Investment Management Corp$10M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| ARISTEIA CAPITAL, L.L.C. added | 2,189,405 | $22M | 1.3% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2,100,000 | $21M | 1.3% | 2026-Q2 |
| Magnetar Financial LLC added | 2,000,000 | $20M | 1.2% | 2026-Q2 |
| MIZUHO SECURITIES USA LLC | 1,710,141 | $18M | 1.1% | 2026-Q2 |
| Alberta Investment Management Corp | 1,750,000 | $17M | 1.0% | 2026-Q2 |
| Linden Advisors LP | 1,500,000 | $15M | 0.9% | 2026-Q2 |
| AQR Arbitrage LLC added | 1,449,082 | $14M | 0.9% | 2026-Q2 |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC added | 1,309,459 | $13M | 0.8% | 2026-Q2 |
| Kryger Capital LLC new | 1,270,887 | $13M | 0.8% | 2026-Q2 |
| LMR Partners LLP | 1,250,000 | $12M | 0.7% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 1,080,000 | $11M | 0.6% | 2026-Q2 |
| Fort Baker Capital Management LP new | 1,000,000 | $10M | 0.6% | 2026-Q2 |
| SONA ASSET MANAGEMENT (US) LLC | 1,000,000 | $10M | 0.6% | 2026-Q2 |
| Westchester Capital Management, LLC trimmed | 853,517 | $8M | 0.5% | 2026-Q2 |
| Polar Asset Management Partners Inc. trimmed | 800,000 | $8M | 0.5% | 2026-Q2 |
| Calamos Advisors LLC | 783,000 | $8M | 0.5% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 765,000 | $8M | 0.5% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 742,958 | $7M | 0.4% | 2026-Q2 |
| OMERS ADMINISTRATION Corp | 626,400 | $6M | 0.4% | 2026-Q2 |
| First Trust Capital Management L.P. trimmed | 600,000 | $6M | 0.4% | 2026-Q2 |
| Verition Fund Management LLC trimmed | 587,590 | $6M | 0.4% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP | 567,675 | $6M | 0.3% | 2026-Q2 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC trimmed | 499,531 | $5M | 0.3% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT | 500,000 | $5M | 0.3% | 2026-Q2 |
| MOORE CAPITAL MANAGEMENT, LP | 500,000 | $5M | 0.3% | 2026-Q2 |
| MMCAP International Inc. SPC | 500,000 | $5M | 0.3% | 2026-Q2 |
| Radcliffe Capital Management, L.P. added | 458,116 | $5M | 0.3% | 2026-Q2 |
| BERKLEY W R CORP trimmed | 447,794 | $4M | 0.3% | 2026-Q2 |
| Shaolin Capital Management LLC trimmed | 428,537 | $4M | 0.3% | 2026-Q2 |
| Sculptor Capital LP added | 427,532 | $4M | 0.3% | 2026-Q2 |
| WHITEBOX ADVISORS LLC | 400,000 | $4M | 0.2% | 2026-Q2 |
| WOLVERINE ASSET MANAGEMENT LLC trimmed | 392,778 | $4M | 0.2% | 2026-Q2 |
| Ghisallo Capital Management LLC | 375,000 | $4M | 0.2% | 2026-Q2 |
| Periscope Capital Inc. trimmed | 350,000 | $3M | 0.2% | 2026-Q2 |
| Wealthspring Capital LLC trimmed | 336,480 | $3M | 0.2% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL | 300,000 | $3M | 0.2% | 2026-Q2 |
| Lineage Point Capital LP trimmed | 294,214 | $3M | 0.2% | 2026-Q2 |
| Qube Research & Technologies Ltd | 250,000 | $3M | 0.2% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC trimmed | 235,000 | $2M | 0.1% | 2026-Q2 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 200,000 | $2M | 0.1% | 2026-Q2 |
| RLH Capital LLC trimmed | 150,000 | $1M | 0.1% | 2026-Q2 |
| Rangeley Capital, LLC added | 127,791 | $1M | 0.1% | 2026-Q2 |
| READYSTATE ASSET MANAGEMENT LP added | 125,000 | $1M | 0.1% | 2026-Q2 |
| Clear Street Group Inc. trimmed | 118,425 | $1M | 0.1% | 2026-Q2 |
| CSS LLC/IL trimmed | 104,501 | $1M | 0.1% | 2026-Q2 |
| DLD Asset Management, LP trimmed | 100,000 | $993K | 0.1% | 2026-Q2 |
| HGC Investment Management Inc. added | 100,000 | $993K | 0.1% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC added | 90,550 | $899K | 0.1% | 2026-Q2 |
| Quarry LP trimmed | 75,233 | $747K | 0.0% | 2026-Q2 |
| Hudson Bay Capital Management LP trimmed | 50,000 | $496K | 0.0% | 2026-Q2 |
| Centiva Capital, LP trimmed | 41,777 | $415K | 0.0% | 2026-Q2 |
| DELTEC ASSET MANAGEMENT LLC trimmed | 30,000 | $298K | 0.0% | 2026-Q2 |
| Cable Car Capital, LP | 30,000 | $298K | 0.0% | 2026-Q2 |
| Crossingbridge Advisors, LLC trimmed | 24,961 | $266K | 0.0% | 2026-Q2 |
| PenderFund Capital Management Ltd. added | 23,400 | $232K | 0.0% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed | 625,000 | $169K | 0.0% | 2026-Q2 |
| CITADEL ADVISORS LLC new | 16,059 | $159K | 0.0% | 2026-Q2 |
| TrueMark Investments, LLC trimmed | 11,031 | $110K | 0.0% | 2026-Q2 |
| LONGFELLOW INVESTMENT MANAGEMENT CO LLC | 8,414 | $84K | 0.0% | 2026-Q2 |
| TORONTO DOMINION BANK trimmed | 119,104 | $32K | 0.0% | 2026-Q2 |
| Walleye Capital LLC new | 75,000 | $20K | 0.0% | 2026-Q2 |
| Arax Advisory Partners new | 1,500 | $15K | 0.0% | 2026-Q2 |
| Galaxy Digital Inc. trimmed | 50,000 | $14K | 0.0% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 1,219 | $12K | 0.0% | 2026-Q2 |
| Parallax Volatility Advisers, L.P. trimmed | 33,790 | $10K | 0.0% | 2026-Q2 |
| UBS Group AG trimmed | 9,665 | $3K | 0.0% | 2026-Q2 |
| MORGAN STANLEY trimmed | 23 | $228 | 0.0% | 2026-Q2 |
| Harraden Circle Investments, LLC trimmed | 3,325,566 | $865M | 52.2% | 2026-Q1 stale (1 quarter behind) |
| METEORA CAPITAL, LLC trimmed | 826,755 | $215M | 13.0% | 2026-Q1 stale (1 quarter behind) |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 500,000 | $130M | 7.8% | 2026-Q1 stale (1 quarter behind) |
| Decagon Asset Management LLP | 69,665 | $18M | 1.1% | 2026-Q1 stale (1 quarter behind) |
| GLAZER CAPITAL, LLC added | 971,419 | $10M | 0.6% | 2026-Q1 stale (1 quarter behind) |
| Karpus Management, Inc. | 620,220 | $7M | 0.4% | 2026-Q1 stale (1 quarter behind) |
| CoinFund Management LLC added | 566,000 | $6M | 0.4% | 2026-Q1 stale (1 quarter behind) |
| GOLDMAN SACHS GROUP INC | 424,430 | $4M | 0.3% | 2026-Q1 stale (1 quarter behind) |
| Mint Tower Capital Management B.V. added | 250,000 | $2M | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Jain Global LLC trimmed | 196,786 | $2M | 0.1% | 2026-Q1 stale (1 quarter behind) |
| L1 Global Manager Pty Ltd | 170,000 | $2M | 0.1% | 2026-Q1 stale (1 quarter behind) |
| O'Connor Alternative Investments LLC new | 149,912 | $2M | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Feynman Point Asset Management LLC | 100,000 | $1M | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Virtu Financial LLC added | 79,870 | $787K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| SkyView Investment Advisors, LLC new | 50,000 | $528K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| ABC ARBITRAGE SA new | 40,000 | $397K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Wellspring Financial Advisors, LLC | 35,000 | $369K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| FLOW TRADERS U.S. LLC trimmed | 29,282 | $309K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| HRT FINANCIAL LP new | 28,446 | $282K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| ROYAL BANK OF CANADA new | 14,800 | $146K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Saba Capital Management, L.P. | 350,017 | $74K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| K2 PRINCIPAL FUND, L.P. trimmed | 113,489 | $30K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Hara Capital LLC | 1,250 | $13K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Pantera Capital Partners LP new | 750,000 | $8M | 0.5% | 2025-Q4 stale (2 quarters behind) |
| J. Goldman & Co LP new | 423,564 | $4M | 0.3% | 2025-Q4 stale (2 quarters behind) |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) new | 149,912 | $2M | 0.1% | 2025-Q4 stale (2 quarters behind) |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. trimmed | 20,371 | $212K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| GRITSTONE ASSET MANAGEMENT LLC trimmed | 166,866 | $25M | 1.5% | 2025-Q3 stale (3 quarters behind) |
| Governors Lane LP | 733,200 | $8M | 0.5% | 2025-Q3 stale (3 quarters behind) |
| ATW SPAC MANAGEMENT LLC | 30,000 | $5M | 0.3% | 2025-Q3 stale (3 quarters behind) |
| Alpine Global Management, LLC | 300,034 | $45K | 0.0% | 2025-Q3 stale (3 quarters behind) |
| CLEAR STREET LLC trimmed | 45,456 | $473K | 0.0% | 2025-Q2 stale (4 quarters behind) |
| CANTOR FITZGERALD, L. P. | 169,400 | $29K | 0.0% | 2025-Q2 stale (4 quarters behind) |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.