MCGAU · Yorkville Acquisition Corp. · Holdings
Substantial doubt about the company's ability to continue as a going concern.
“These conditions raise substantial doubt about our ability to continue as a going concern for a period of time within one year from the date that the financial statements accompanying this Quarterly Report on Form 10-Q are issued.”View the 10-Q filed Aug 12, 2026
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 7 13F filers · Δ vs Mar 31, 2026Who Holds MCGAU
Last 5 quarters through Jun 30, 2026Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026: 7 filers, like-for-like change +7.1%; actively managed books +7.4%; index-like books 0.0%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 8.0% | 2 | 0.0% |
| Bank | 8.1% | 2 | +0.5% |
| Holding company | 4.0% | 1 | 0.0% |
| Non-US | 0.0% | 0 | — |
| Exempt adviser | 0.0% | 0 | — |
| Adviser | 0.0% | 0 | — |
| Insurer | 0.0% | 0 | — |
| Broker-dealer | 0.0% | 0 | — |
| Unknown | 79.9% | 2 | +9.0% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 4.0% | 1 | 0.0% |
| Systematic-like | 3.0% | 1 | 0.0% |
| Concentrated | 53.9% | 1 | +21.7% |
| Diversified active | 39.0% | 4 | -7.1% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 12.0% | 2 | 0.0% |
| Medium turnover | 5.1% | 2 | -37.2% |
| High turnover | 29.0% | 2 | 0.0% |
| Unknown | 53.9% | 1 | +21.7% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 84.9% | 3 | +12.8% |
| Long horizon | 12.1% | 3 | +0.4% |
| Medium horizon | 0.0% | 0 | — |
| Unknown | 3.0% | 1 | -50.1% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 26.0% | 1 | -10.5% |
| $1B to $10B | 5.0% | 1 | 0.0% |
| $10B to $100B | 57.0% | 2 | +20.3% |
| $100B or more | 12.1% | 3 | +0.4% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Pooled investment vehicles | 8.0% | 2 | 0.0% |
| Individuals and high net worth | 0.0% | 0 | — |
| Registered funds and BDCs | 0.0% | 0 | — |
| Charitable organizations | 0.0% | 0 | — |
| Unknown | 92.0% | 5 | +7.8% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 8.0% | 2 | 0.0% |
| Private equity funds | 0.0% | 0 | — |
| Private funds, type not stated | 0.0% | 0 | — |
| No private funds | 0.0% | 0 | — |
| Unknown | 92.0% | 5 | +7.8% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 99.9% | 6 | +7.1% |
| Outside the US | 0.1% | 1 | +230.5% |
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Conviction and Crowding
7 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 5.06% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies MCGAU's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | CHAR Charlton Aria Acquisition Corp | 5 |
| 2 | SBXDF SilverBox Corp IV | 8 |
| 3 | IPEX Inflection Point Acquisition Corp. V | 5 |
| 4 | LPAA Launch One Acquisition Corp. | 5 |
| 5 | APXT Apex Treasury Corp | 6 |
| 6 | SDHI Siddhi Acquisition Corp (Cayman Islands) | 4 |
| 7 | FSHP Flag Ship Acquisition Corp | 3 |
| 8 | POLE Andretti Acquisition Corp. II | 6 |
| 9 | PCAP ProCap Acquisition Corp | 5 |
| 10 | FERA Fifth Era Acquisition Corp I | 5 |
Shareholder Targets
13F filers that own its peers but not MCGAU, quarter ended Jun 30, 2026Found through its holder-overlap peers: CHAR, SBXDF, IPEX, LPAA, APXT, SDHI, FSHP, POLE, PCAP, FERA, APAC, DAAQ, XRPNU, KTWO, FVN, NMP, DTSQ, EURK, PONO, ADAC. 89 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | Alberta Investment Management Corp Non-US, Diversified active | $72,815,000 8 held | POLE, APXT, ADAC |
| 2 | Karpus Management, Inc. Adviser, Diversified active | $72,800,633 13 held | CHAR, APXT, IPEX |
| 3 | HIGHBRIDGE CAPITAL MANAGEMENT LLC Registered adviser, Diversified active | $65,841,134 11 held | APXT, KTWO, PONO |
| 4 | MMCAP International Inc. SPC Unknown, Diversified active | $63,718,000 6 held | FERA, LPAA, SBXDF |
| 5 | Arrington Capital Management, LLC Registered adviser, Concentrated | $60,394,320 1 held | XRPNU |
| 6 | RIVERNORTH CAPITAL MANAGEMENT, LLC Registered adviser, Diversified active | $54,003,482 15 held | POLE, NMP, XRPNU |
| 7 | GOLDMAN SACHS GROUP INC Holding company, Index-like | $43,393,589 13 held | POLE, LPAA, SBXDF |
| 8 | ADAGE CAPITAL PARTNERS GP, L.L.C. Registered adviser, Diversified active | $35,137,500 2 held | APXT, ADAC |
| 9 | TWO SIGMA INVESTMENTS, LP Registered adviser, Systematic-like | $32,846,131 10 held | FERA, APXT, SDHI |
| 10 | Calamos Advisors LLC Registered adviser, Diversified active | $30,501,585 6 held | POLE, SDHI, SBXDF |
Quarterly Activity
New and Sold Out count only filers that reported a 13F for both quarters: a first-time filer's book is not a buy, and a fund that has not filed, or withheld its positions under confidential treatment, has not sold.
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Large Clear Street Group Inc. | +48,132 | 269,756 | |
| Mega UBS Group AG | +219 | 314 |
Top Sellers
vs Mar 31, 2026Top New Positions
vs Mar 31, 2026Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Small ROBINSON CAPITAL MANAGEMENT, LLC | 15,200 | $155,526 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Large Clear Street Group Inc. MCGAU | $2,781,184 | 53.93% | 269,756 | Shares | 2026-08-12 | |
| Mid Massar Capital Management, LP MCGAU | $1,340,300 | 25.99% | 130,000 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO Bank MCGAU | $412,400 | 8.00% | 40,000 | Shares | 2026-08-12 | |
| Mid GLAZER CAPITAL, LLC Registered adviser MCGAU | $257,750 | 5.00% | 25,000 | Shares | 2026-08-17 | |
| Mega MORGAN STANLEY Holding company MCGAU | $206,200 | 4.00% | 20,000 | Shares | 2026-08-13 | |
| Large Schonfeld Strategic Advisors LLC Registered adviser MCGAU | $156,134 | 3.03% | 15,144 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank MCGAU | $3,237 | 0.06% | 314 | Shares | 2026-08-13 |