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MCGA · Yorkville Acquisition Corp. · Holdings

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$10.39 +0.00 (+0.00%)
Rebalance outlook locked
Going-concern doubt — flagged Aug 12, 2026

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
Market Cap
$245.01M
Shares
23.58M
Volume · Oct 28 17.65K Avg daily vol (3M) 90.4K

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.

Use institutional holdings through the 13F API or MCP → See every holder of MCGA: 13F, 13D and 13G, insiders and funds →
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 62
Total Value: $166,299,888
Total Shares: 18,957,113

Institutional Ownership Trend

6 quarters

Holder Concentration

Across 62 13F filers
Top Holder
10.1%
Jun 2025 → Jun 2026 · range 10.1% – 14.5%
of institutional value
Top 5
36.3%
Jun 2025 → Jun 2026 · range 34.5% – 46.1%
of institutional value
Top 10
56.3%
Jun 2025 → Jun 2026 · range 55.2% – 64.8%
of institutional value
HHI
434
Jun 2025 → Jun 2026 · range 419 – 573
Broadly held

Who Holds MCGA

Last 6 quarters through Sep 30, 2026 (filing window open)

Each 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, the newest closed quarter: 62 filers, like-for-like change +2.0%; actively managed books +2.1%; index-like books -38.3%.

Holder type Share Filers Change
Registered adviser 42.6% 28 -0.6%
Exempt adviser 8.4% 4 0.0%
Adviser 9.9% 3 -9.3%
Bank 1.7% 3 -26.6%
Insurer 9.0% 1 0.0%
Broker-dealer 0.0% 1 new
Non-US 1.4% 3 0.0%
Holding company 0.1% 1 -0.1%
Unknown 26.9% 18 +16.7%

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

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.

Excluded 1 holder with no observed 2026-06-30 13F.

Conviction and Crowding

54 13F filers, quarter ended Jun 30, 2026

Measured 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.

Conviction holders
4
7.41% of filers hold it in their top 10
Mar 31, 2026: 4
Holders above 5%
1
median weight 0.049%
Mar 31, 2026: 1
Crowding
—
the issuer has more than one class of common stock, so its count is the total across classes
Private-fund advisers
—
of shares outstanding
Institutional ownership
—
the issuer has more than one class of common stock, so its count is the total across classes
Top 10 holders
59.9%
of 13F shares, Herfindahl 0.048
Active holders
+3.1%
like-for-like share change of active filers
5% stakes on record
4
1 13D, 3 13G (3 institutional, 0 passive, 0 exempt)
How long holders have held it value-weighted 3.6 quarters
Under 1 year 21.2% 1 to 3 years 78.8% 3 years or more 0.000% Since coverage start 0.000%

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 basis

Estimated, 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 avg cost
$10.42
estimated per share
Mar 31, 2026: $10.43
Quarter-end price
$10.04
implied by 13F values
Estimated gain or loss
-3.6%
price against the estimated cost
Estimated at a loss
71.4%
of costed 13F value

Estimated cost covers 95.4% 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 MCGA's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 SBXDF SilverBox Corp IV 8
2 PCAP ProCap Acquisition Corp 10
3 IPEX Inflection Point Acquisition Corp. V 6
4 DAAQ Digital Asset Acquisition Corp. 8
5 KFII K&F Growth Acquisition Corp. II 9
6 DYNC Dynamix Corp 7
7 QUMS Quantumsphere Acquisition Corp 6
8 FSHP Flag Ship Acquisition Corp 4
9 APXT Apex Treasury Corp 8
10 CEPO Cantor Equity Partners I, Inc. 6

Shareholder Targets

13F filers that own its peers but not MCGA, quarter ended Jun 30, 2026

Found through its holder-overlap peers: SBXDF, PCAP, IPEX, DAAQ, KFII, DYNC, QUMS, FSHP, APXT, CEPO, TVA, GSRF, XRPNU, NWAX, NMP, ONEN, GIX, KCHV, CHPG, OHAC. 122 filers in all.

# Filer In peers
1 HIGHBRIDGE CAPITAL MANAGEMENT LLC Registered adviser, Diversified active $100,436,704 14 held
2 Karpus Management, Inc. Adviser, Diversified active $76,219,818 10 held
3 Arrington Capital Management, LLC Registered adviser, Concentrated $60,513,320 1 held
4 RIVERNORTH CAPITAL MANAGEMENT, LLC Registered adviser, Diversified active $60,436,576 18 held
5 TWO SIGMA INVESTMENTS, LP Registered adviser, Systematic-like $56,203,976 10 held
6 Alberta Investment Management Corp Non-US, Concentrated $47,856,740 6 held
7 Governors Lane LP Registered adviser, Diversified active $42,592,861 7 held
8 ADAGE CAPITAL PARTNERS GP, L.L.C. Registered adviser, Diversified active $38,705,000 3 held
9 J. Goldman & Co LP Registered adviser, Diversified active $37,433,092 3 held
10 GOLDMAN SACHS GROUP INC Holding company, Index-like $34,971,964 12 held

Fund Ownership of MCGA by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 0.00% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 0.00% 0
Index ETFs 0.00% 0
Active ETFs 0.00% 0
Active funds 1.37% 322,807
Unclassified 0.00% 0
All registered funds 1.37% 322,807
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Holder type: Registered adviser 28 Exempt adviser 4 Adviser 3 Bank 3 Insurer 1 Broker-dealer 1 Non-US 3 Holding company 1 Unknown 18
Showing 97 of 97
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
BERKLEY W R CORP $16,801,269 10.10% 1,645,570
MIZUHO SECURITIES USA LLC $15,982,989 9.61% 1,565,425
Murchinson Ltd. $10,214,084 6.14% 1,000,400
Davidson Kempner Capital Management LP $8,678,500 5.22% 850,000
Crossingbridge Advisors, LLC $8,678,500 5.22% 850,000
D. E. Shaw & Co., Inc. $7,657,500 4.60% 750,000
METEORA CAPITAL, LLC $7,191,444 4.32% 704,353
BOOTHBAY FUND MANAGEMENT, LLC $6,509,998 3.91% 637,610
DLD Asset Management, LP $6,268,021 3.77% 613,910
Westchester Capital Management, LLC $5,615,498 3.38% 550,000
Anson Funds Management LP MCGAW $4,673,801 2.81% 457,767
RLH Capital LLC $4,515,178 2.72% 442,231
Shaolin Capital Management LLC $3,457,361 2.08% 338,625
MILLENNIUM MANAGEMENT LLC $3,231,465 1.94% 316,500
First Trust Capital Management L.P. $3,188,889 1.92% 312,330
AQR Arbitrage LLC $3,016,993 1.81% 295,494
Radcliffe Capital Management, L.P. $3,008,784 1.81% 294,690
SkyView Investment Advisors, LLC $2,889,103 1.74% 282,968
Clear Street Group Inc. MCGAU $2,781,184 1.67% 269,756
Polar Asset Management Partners Inc. $2,702,505 1.63% 264,692
GLAZER CAPITAL, LLC $2,686,843 1.62% 263,158
Quarry LP $2,573,992 1.55% 252,105
LMR Partners LLP $2,115,593 1.27% 207,208
Linden Advisors LP $2,042,000 1.23% 200,000
TENOR CAPITAL MANAGEMENT Co., L.P. $2,042,000 1.23% 200,000
TORONTO DOMINION BANK $2,012,605 1.21% 197,121
Magnetar Financial LLC $1,990,950 1.20% 195,000
JANE STREET GROUP, LLC $1,811,335 1.09% 177,408
Hudson Bay Capital Management LP $1,531,500 0.92% 150,000
HRT FINANCIAL LP $1,504,657 0.90% 147,371
Massar Capital Management, LP MCGAU $1,340,300 0.81% 130,000
Periscope Capital Inc. $1,276,250 0.77% 125,000
CITADEL ADVISORS LLC $1,253,788 0.75% 122,800
SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,148,164 0.69% 112,455
BNP PARIBAS ARBITRAGE, SA $1,107,366 0.67% 108,459
Lineage Point Capital LP $1,022,021 0.61% 100,100
Context Capital Management, LLC $1,021,000 0.61% 100,000
MOORE CAPITAL MANAGEMENT, LP $1,021,000 0.61% 100,000
WHITEBOX ADVISORS LLC $1,021,000 0.61% 100,000
Mint Tower Capital Management B.V. $1,021,000 0.61% 100,000
PICTON MAHONEY ASSET MANAGEMENT $867,809 0.52% 84,996
CSS LLC/IL $839,803 0.50% 82,253
JANE STREET GROUP, LLC $787,191 0.47% 77,100
Jain Global LLC $765,750 0.46% 75,000
Brevan Howard Capital Management LP $612,600 0.37% 60,000
JPMORGAN CHASE & CO MCGAU $412,400 0.25% 40,000
CITADEL ADVISORS LLC $401,998 0.24% 39,373
Virtu Financial LLC $380,414 0.23% 37,259
JPMORGAN CHASE & CO $305,483 0.18% 29,920
Schonfeld Strategic Advisors LLC $305,258 0.18% 29,898
GLAZER CAPITAL, LLC MCGAU $257,750 0.15% 25,000
MORGAN STANLEY MCGAU $206,200 0.12% 20,000
K2 PRINCIPAL FUND, L.P. $184,545 0.11% 18,075
Schonfeld Strategic Advisors LLC MCGAU $156,134 0.09% 15,144
ROBINSON CAPITAL MANAGEMENT, LLC $155,192 0.09% 15,200
SUSQUEHANNA INTERNATIONAL GROUP, LLP $137,835 0.08% 13,500
Clear Street Group Inc. $137,709 0.08% 263,316
Harraden Circle Investments, LLC MCGAW $130,790 0.08% 510,699
WOLVERINE ASSET MANAGEMENT LLC $65,956 0.04% 6,460
Shaolin Capital Management LLC MCGAW $51,633 0.03% 201,612
METEORA CAPITAL, LLC MCGAW $51,143 0.03% 199,700
Decagon Asset Management LLP MCGAW $44,886 0.03% 175,268
HGC Investment Management Inc. $39,328 0.02% 3,852
ARISTEIA CAPITAL, L.L.C. MCGAW $36,954 0.02% 126,296
LMR Partners LLP MCGAW $34,146 0.02% 133,332
DLD Asset Management, LP MCGAW $33,370 0.02% 130,299
AQR Arbitrage LLC MCGAW $26,220 0.02% 102,303
Clear Street Group Inc. MCGAW $25,195 0.02% 98,380
Linden Advisors LP MCGAW $24,384 0.01% 83,334
Rangeley Capital, LLC $20,583 0.01% 2,016
Magnetar Financial LLC MCGAW $17,086 0.01% 66,664
TENOR CAPITAL MANAGEMENT Co., L.P. MCGAW $17,073 0.01% 66,666
GROUP ONE TRADING LLC $15,315 0.01% 1,500
Periscope Capital Inc. MCGAW $12,783 0.01% 49,900
Parallax Volatility Advisers, L.P. MCGAW $12,703 0.01% 49,564
TORONTO DOMINION BANK MCGAW $10,772 0.01% 42,078
BERKLEY W R CORP MCGAW $10,169 0.01% 39,676
K2 PRINCIPAL FUND, L.P. MCGAW $9,967 0.01% 38,333
Radcliffe Capital Management, L.P. MCGAW $9,167 0.01% 31,330
D. E. Shaw & Co., Inc. MCGAW $8,543 0.01% 33,333
WHITEBOX ADVISORS LLC MCGAW $8,537 0.01% 33,333
MOORE CAPITAL MANAGEMENT, LP MCGAW $8,537 0.01% 33,333
BNP PARIBAS ARBITRAGE, SA MCGAW $8,206 0.00% 32,041
PICTON MAHONEY ASSET MANAGEMENT MCGAW $7,256 0.00% 28,332
Jain Global LLC MCGAW $6,408 0.00% 25,000
MILLENNIUM MANAGEMENT LLC MCGAW $6,402 0.00% 25,000
READYSTATE ASSET MANAGEMENT LP MCGAW $6,301 0.00% 24,586
Hudson Bay Capital Management LP MCGAW $3,757 0.00% 14,657
T3 Companies, LLC MCGAW $3,707 0.00% 13,009
UBS Group AG MCGAU $3,237 0.00% 314
WOLVERINE ASSET MANAGEMENT LLC MCGAW $2,902 0.00% 11,332
UBS Group AG $2,256 0.00% 221
HGC Investment Management Inc. MCGAW $2,134 0.00% 8,333
SIMPLEX TRADING, LLC $939 0.00% 92
MORGAN STANLEY $633 0.00% 62
Mint Tower Capital Management B.V. MCGAW $9 0.00% 33,333
Context Capital Management, LLC MCGAW — — 25,000
Key facts CIK 2064658 CUSIP G98659116 Visit website