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Disclosery

MACI MELAR ACQUISITION CORP. I

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SHS CL A (common), issuer CIK 2016221

37 managers (37 13F filers) reported a position in MACI shares at 2025-09-30, 15,611,354 shares in all. 4 filers opened a position and 3 filers sold out during the quarter.

Managers
37
13F filers
37
New
4
Added
6
Reduced
7
Sold out
3
Shares held by filers
15,611,354

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Polar Asset Management Partners Inc.1,485,000$15.6M0.32%013F-HR/ATimeline
LMR Partners LLPin group LMR Partners LLP1,485,000$15.6M0.2%013F-HRTimelineGroup
First Trust Capital Management L.P.in group FIRST TRUST ADVISORS LP1,400,000$14.7M0.95%013F-HRTimelineGroup
Karpus Management, Inc.1,146,655$12M0.38%-125,88313F-HRTimeline
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC997,179$10.5M0.27%-9,00013F-HRTimelineGroup
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC926,328$9.73M0.14%+536,27613F-HRTimelineGroup
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC891,304$9.32M0.19%+688,05013F-HRTimelineGroup
BERKLEY W R CORP645,820$6.78M0.44%+322,37213F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.576,328$6.06M<0.01%013F-HRTimelineGroup
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC556,374$5.84M0.2%013F-HRTimelineGroup
Cable Car Capital, LP492,500$5.17M2.22%013F-HRTimeline
Wealthspring Capital LLCin group Wealthspring Capital LLC458,925$4.82M1.15%-31013F-HRTimelineGroup
Radcliffe Capital Management, L.P.426,939$4.48M0.28%+132,56413F-HRTimeline
Westchester Capital Management, LLCin group Westchester Capital Managemen…424,707$4.46M0.23%013F-HRTimelineGroup
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…400,000$4.2M0.02%013F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP375,000$3.94M0.01%013F-HRTimelineGroup
Magnetar Financial LLCin group Magnetar Financial LLC371,250$3.9M0.02%013F-HRTimelineGroup
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…325,000$3.42M0.02%013F-HR/ATimelineGroup
Alberta Investment Management Corp325,000$3.42M0.02%013F-HR/ATimeline
PICTON MAHONEY ASSET MANAGEMENT325,000$3.41M0.04%013F-HRTimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC299,547$3.15M0.18%-45113F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC299,331$3.14M<0.01%013F-HRTimelineGroup
Periscope Capital Inc.235,412$2.47M0.6%+35,41213F-HRTimeline
HGC Investment Management Inc.175,000$1.84M0.45%new13F-HRTimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK120,040$1.26M<0.01%-100,68913F-HRTimelineGroup
DELTEC ASSET MANAGEMENT LLC100,000$1.05M0.17%013F-HRTimeline
MOORE CAPITAL MANAGEMENT, LP75,000$788K0.02%013F-HRTimeline
BCK CAPITAL MANAGEMENT LP68,874$723K0.77%+18,87413F-HRTimeline
HEIGHTS CAPITAL MANAGEMENT, INCin group HEIGHTS CAPITAL MANAGEMENT, I…64,366$676K0.22%-35,63313F-HR/ATimelineGroup
Dakota Wealth Management39,000$410K0.01%013F-HR/ATimeline
Sandia Investment Management LP23,711$249K0.74%new13F-HRTimeline
Quarry LP23,711$249K0.06%new13F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC20,514$216K<0.01%013F-HRTimelineGroup
Tuttle Capital Management, LLC15,000$158K0.6%013F-HRTimeline
HRT FINANCIAL LP10,000$105K<0.01%new13F-HRTimeline
LONGFELLOW INVESTMENT MANAGEMENT CO LLC7,520$79K0.02%013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY19$200<0.01%-4513F-HR/ATimelineGroup