YORKVILLE ACQUISITION CORP. (MCGA)
Institutional ownership reported to the SEC as of Q2 2026, across 4 quarters.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| MIZUHO SECURITIES USA LLC | $29.0M | 2,857,678 | 0.28% | 4q | +121.1%+$15.9M |
| BERKLEY W R CORP | $16.8M | 1,645,570 | 0.80% | 4q | HELD |
| Murchinson Ltd. | $10.2M | 1,000,400 | 1.41% | 4q | HELD |
| Davidson Kempner Capital Management LP | $8.7M | 850,000 | 0.10% | 4q | HELD |
| Crossingbridge Advisors, LLC | $8.7M | 850,000 | 1.53% | 2q | HELD |
| D. E. Shaw & Co., Inc. | $7.7M | 750,000 | 0.00% | 4q | HELD |
| Meteora Capital, LLC | $7.2M | 704,353 | 0.60% | 4q | -11.3%-$914.7K |
| BOOTHBAY FUND MANAGEMENT, LLC | $6.5M | 637,610 | 0.09% | 4q | HELD |
| DLD Asset Management, LP | $6.3M | 613,910 | 0.41% | 4q | -4.2%-$278.0K |
| Westchester Capital Management, LLC | $5.6M | 550,000 | 0.27% | 2q | HELD |
| RLH Capital LLC | $4.5M | 442,231 | 2.16% | 2q | HELD |
| Shaolin Capital Management LLC | $3.5M | 338,625 | 0.16% | 4q | -15.3%-$626.6K |
| CITADEL ADVISORS LLC | $3.3M | 78,746 | 0.00% | 3q | +430.3%+$2.7M |
| MILLENNIUM MANAGEMENT LLC | $3.2M | 316,500 | 0.00% | 4q | HELD |
| First Trust Capital Management L.P. | $3.2M | 312,330 | 0.19% | 4q | HELD |
| AQR Arbitrage LLC | $3.0M | 295,494 | 0.04% | 4q | +0.9%+$27.9K |
| Radcliffe Capital Management, L.P. | $3.0M | 294,690 | 0.23% | 4q | HELD |
| Polar Asset Management Partners Inc. | $2.7M | 264,692 | 0.04% | 4q | +10.4%+$255.2K |
| GLAZER CAPITAL, LLC | $2.7M | 263,158 | 0.07% | 4q | +5.1%+$131.1K |
| JANE STREET GROUP, LLC | $2.6M | 177,408 | 0.00% | 3q | +818.3%+$2.3M |
| Quarry LP | $2.6M | 252,105 | 0.21% | 2q | HELD |
| LMR Partners LLP | $2.1M | 207,208 | 0.01% | 4q | HELD |
| Linden Advisors LP | $2.0M | 200,000 | 0.01% | 4q | HELD |
| TENOR CAPITAL MANAGEMENT Co., L.P. | $2.0M | 200,000 | 0.03% | 4q | HELD |
| TORONTO DOMINION BANK | $2.0M | 197,121 | 0.00% | 2q | -39.3%-$1.3M |
| Magnetar Financial LLC | $2.0M | 195,000 | 0.02% | 4q | HELD |
| Hudson Bay Capital Management LP | $1.5M | 150,000 | 0.00% | 4q | HELD |
| HRT FINANCIAL LP | $1.5M | 147,371 | 0.00% | 4q | +3.5%+$51.1K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.3M | 112,455 | 0.00% | 4q | +5.0%+$60.7K |
| Periscope Capital Inc. | $1.3M | 125,000 | 0.11% | 4q | HELD |
| BNP PARIBAS FINANCIAL MARKETS | $1.1M | 108,459 | 0.00% | 4q | HELD |
| Lineage Point Capital LP | $1.0M | 100,100 | 0.21% | 2q | HELD |
| WHITEBOX ADVISORS LLC | $1.0M | 100,000 | 0.01% | 4q | HELD |
| Context Capital Management, LLC | $1.0M | 100,000 | 0.02% | 4q | HELD |
| MOORE CAPITAL MANAGEMENT, LP | $1.0M | 100,000 | 0.02% | 4q | HELD |
| Mint Tower Capital Management B.V. | $1.0M | 100,000 | 0.12% | 4q | HELD |
| PICTON MAHONEY ASSET MANAGEMENT | $867.8K | 84,996 | 0.01% | 4q | HELD |
| CSS LLC/IL | $839.8K | 82,253 | 0.03% | 4q | HELD |
| Jain Global LLC | $765.8K | 75,000 | 0.00% | 3q | HELD |
| Brevan Howard Capital Management LP | $612.9K | 60,000 | 0.00% | 2q | HELD |
| Virtu Financial LLC | $380.0K | 37,259 | 0.01% | 4q | -6.9%-$28.0K |
| JPMORGAN CHASE & CO | $305.5K | 29,920 | 0.00% | 4q | HELD |
| Schonfeld Strategic Advisors LLC | $305.3K | 29,898 | 0.00% | 3q | +100.7%+$153.1K |
| K2 PRINCIPAL FUND, L.P. | $184.5K | 18,075 | 0.01% | 4q | HELD |
| ROBINSON CAPITAL MANAGEMENT, LLC | $155.2K | 15,200 | 0.07% | new | NEW |
| Clear Street Group Inc. | $137.7K | 263,316? | 0.00% | 4q | |
| WOLVERINE ASSET MANAGEMENT LLC | $66.0K | 6,460 | 0.00% | 4q | -81.5%-$291.4K |
| HGC Investment Management Inc. | $39.3K | 3,852 | 0.01% | 4q | HELD |
| Rangeley Capital, LLC | $20.6K | 2,016 | 0.02% | new | NEW |
| GROUP ONE TRADING LLC | $15.3K | 1,500 | 0.00% | new | NEW |
| SkyView Investment Advisors, LLC | $2.9K | 282,968? | 2.26% | new | |
| UBS Group AG | $2.3K | 221 | 0.00% | 4q | -71.1%-$5.6K |
| SIMPLEX TRADING, LLC | $939 | 92 | 0.00% | new | NEW |
| MORGAN STANLEY | $633 | 62 | 0.00% | 3q | -19.5% |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-13 | 13G/A | Mizuho Financial Group, Inc. SPAC | 8.8% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 52 | $167.5M | 16,085,018 | 4 | 9 | 8 | 2.0% |
| Q1 2026 | 52 | $152.6M | 15,238,281 | 7 | 12 | 9 | 0.6% |
| Q4 2025 | 49 | $144.1M | 14,412,435 | 6 | 14 | 6 | 0.3% |
| Q3 2025 | 56 | $130.3M | 12,200,590 | 55 | 0 | 0 | 0.2% |