MCGA · Yorkville Acquisition Corp. · Shareholders & Ownership
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
Every disclosed holder of MCGA in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns MCGA
13F quarter Jun 30, 2026No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 18,718,713 | 79.38% |
| Insiders (Forms 3, 4, 5) | 0 | 0.00% |
| 13D/G-only blocks | 7,667,250 | 32.51% |
| Remaining | 2,804,713 | -11.89% |
| Registered funds (N-PORT, not summed) | 322,807 | 1.37% |
Shares outstanding: 23,581,250, the issuer's latest cover-page count restated onto today's split basis.
Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.
Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of MCGA
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
|
1,685,246 | ||
| 2 |
Mizuho Financial Group, Inc.
13G
CIK 1335730 · Bank · Jun 30, 2026
Rule 13d-1(b), qualified institution
|
1,565,425 | ||
| 3 |
MIZUHO SECURITIES USA LLC
13F
CIK 812291 · Unknown · Jun 30, 2026
|
1,565,425 | ||
| 4 |
Murchinson Ltd.
13F
CIK 1838556 · Exempt reporting adviser · Jun 30, 2026
|
1,000,400 | ||
| 5 |
|
904,053 | ||
| 6 |
Crossingbridge Advisors, LLC
13F
CIK 1770024 · Investment adviser · Jun 30, 2026
|
850,000 | ||
| 7 |
Davidson Kempner Capital Management LP
13F
CIK 1595082 · Registered investment adviser · Jun 30, 2026
|
850,000 | ||
| 8 |
|
783,333 | ||
| 9 |
DLD Asset Management, LP
13F
CIK 1578299 · Registered investment adviser · Jun 30, 2026
Classes MCGA, MCGAW
|
744,209 | ||
| 10 |
BOOTHBAY FUND MANAGEMENT, LLC
13F
CIK 1549230 · Registered investment adviser · Jun 30, 2026
|
637,610 | ||
| 11 |
|
631,452 | ||
| 12 |
Westchester Capital Management, LLC
13F
CIK 1512805 · Registered investment adviser · Jun 30, 2026
|
550,000 | ||
| 13 |
Shaolin Capital Management LLC
13F
CIK 1766806 · Registered investment adviser · Jun 30, 2026
Classes MCGA, MCGAW
|
540,237 | ||
| 14 |
Harraden Circle Investments, LLC
13F
CIK 1910592 · Registered investment adviser · Jun 30, 2026
|
510,699 | ||
| 15 |
Anson Funds Management LP
13F
CIK 1491072 · Registered investment adviser · Jun 30, 2026
|
457,767 | ||
| 16 |
RLH Capital LLC
13F
CIK 2008031 · Unknown · Jun 30, 2026
|
442,231 | ||
| 17 |
AQR Arbitrage LLC
13F
CIK 1167456 · Registered investment adviser · Jun 30, 2026
Classes MCGA, MCGAW
|
397,797 | ||
| 18 |
|
351,825 | ||
| 19 |
Yorkville Acquisition Sponsor LLC
Insider
CIK 2074603 · Jun 30, 2025
10% Owner, issuer-wide, not summed
|
351,825 | ||
| 19.1 |
Yorkville Acquisition Sponsor LLC
13D
CIK 2074603 · Unknown · Jun 26, 2025
|
6,101,825 | ||
| 20 |
|
340,540 | ||
| 21 |
Radcliffe Capital Management, L.P.
13F
CIK 1218275 · Registered investment adviser · Jun 30, 2026
Classes MCGA, MCGAW
|
326,020 | ||
| 22 |
MILLENNIUM MANAGEMENT LLC
13F
CIK 1273087 · Registered investment adviser · Jun 30, 2026
|
316,500 | ||
| 23 |
First Trust Capital Management L.P.
13F
CIK 1604488 · Registered investment adviser · Jun 30, 2026
|
312,330 | ||
| 24 |
GLAZER CAPITAL, LLC
13F
CIK 1076809 · Registered investment adviser · Jun 30, 2026
Classes MCGA, MCGAU
|
288,158 | ||
| 25 |
Linden Advisors LP
13F
CIK 1279396 · Registered investment adviser · Jun 30, 2026
Classes MCGA, MCGAW
|
283,334 | ||
| 26 |
SkyView Investment Advisors, LLC
13F
CIK 1848237 · Unknown · Jun 30, 2026
|
282,968 | ||
| 27 |
TENOR CAPITAL MANAGEMENT Co., L.P.
13F
CIK 1346554 · Registered investment adviser · Jun 30, 2026
Classes MCGA, MCGAW
|
266,666 | ||
| 28 |
Polar Asset Management Partners Inc.
13F
CIK 1326389 · Registered investment adviser · Jun 30, 2026
|
264,692 | ||
| 29 |
First Trust Merger Arbitrage Fund
Fund
S000048195 · Registered fund · Jun 30, 2026
INVESTMENT MANAGERS SERIES TRUST II, not summed
|
262,128 | ||
| 30 |
Magnetar Financial LLC
13F
CIK 1352851 · Registered investment adviser · Jun 30, 2026
Classes MCGA, MCGAW
|
261,664 | ||
| 31 |
Quarry LP
13F
CIK 1965207 · Unknown · Jun 30, 2026
|
252,105 | ||
| 32 |
|
239,199 | ||
| 33 |
JANE STREET GROUP, LLC
13F
CIK 1595888 · Unknown · Jun 30, 2026
|
177,408 | ||
| 34 |
Decagon Asset Management LLP
13F
CIK 1950677 · Unknown · Jun 30, 2026
|
175,268 | ||
| 35 |
Periscope Capital Inc.
13F
CIK 1695320 · Exempt reporting adviser · Jun 30, 2026
Classes MCGA, MCGAW
|
174,900 | ||
| 36 |
Hudson Bay Capital Management LP
13F
CIK 1393825 · Registered investment adviser · Jun 30, 2026
Classes MCGA, MCGAW
|
164,657 | ||
| 37 |
HRT FINANCIAL LP
13F
CIK 1475597 · Unknown · Jun 30, 2026
|
147,371 | ||
| 38 |
|
140,500 | ||
| 39 |
|
133,333 | ||
| 40 |
MOORE CAPITAL MANAGEMENT, LP
13F
CIK 1448574 · Registered investment adviser · Jun 30, 2026
Classes MCGA, MCGAW
|
133,333 | ||
| 41 |
WHITEBOX ADVISORS LLC
13F
CIK 1257391 · Registered investment adviser · Jun 30, 2026
Classes MCGA, MCGAW
|
133,333 | ||
| 42 |
Massar Capital Management, LP
13F
CIK 2037238 · Unknown · Jun 30, 2026
|
130,000 | ||
| 43 |
ARISTEIA CAPITAL, L.L.C.
13F
CIK 1080171 · Registered investment adviser · Jun 30, 2026
|
126,296 | ||
| 44 |
Context Capital Management, LLC
13F
CIK 1301396 · Registered investment adviser · Jun 30, 2026
Classes MCGA, MCGAW
|
125,000 | ||
| 45 |
PICTON MAHONEY ASSET MANAGEMENT
13F
CIK 1539041 · Non-US institution · Jun 30, 2026
Classes MCGA, MCGAW
|
113,328 | ||
| 46 |
SUSQUEHANNA INTERNATIONAL GROUP, LLP
13F
CIK 1446194 · Unknown · Jun 30, 2026
|
112,455 | ||
| 47 |
Lineage Point Capital LP
13F
CIK 2093311 · Unknown · Jun 30, 2026
|
100,100 | ||
| 48 |
|
100,000 | ||
| 49 |
|
91,770 | ||
| 50 |
CSS LLC/IL
13F
CIK 1103646 · Unknown · Jun 30, 2026
|
82,253 |
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
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