Skip to content
Disclosery

MASON CAPITAL MANAGEMENT LLC

Follow

13F filer, CIK 1218735, NEW YORK, NY

MASON CAPITAL MANAGEMENT LLC reported $502,600,502 across 6 holdings for the quarter ended 2024-09-30, in a 13F-HR filed 2024-11-14.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001104659-24-118983

Period
2024-09-30
Reported value
$503M
Holdings
6
Top 10 weight
100%
New
1
Sold out
1

Largest buys vs the previous quarter

SecurityShares changeApprox. value
ATSadded+565,000$16.4M
MDRXadded+1,561,471$15.1M
RCnew+838,856$6.4M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
BARNES GROUP INCreduced-501,861-$20.3M
IIIVexited-337,099-$7.44M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q3 2024

Share positions as resolved from 13F-HR 0001104659-24-118983, largest first. % of portfolio is the value over $502,600,502, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
ATSATS CORPORATIONQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2022Q4: restricted; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 14,914,765 shares 14,914,765$433M86.21%+565,000Timeline
MDRXVERADIGM INC. COMMON STOCK(DE)Quarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2022Q4: restricted; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 2,499,709 shares 2,499,709$24.2M4.82%+1,561,471Timeline
BARNES GROUP INCBARNES GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2022Q4: restricted; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 548,218 shares 548,218$22.2M4.41%-501,861
CCOCLEAR CHANNEL OUTDOOR HLDGSQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2022Q4: restricted; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 9,828,401 shares 9,828,401$15.7M3.13%0Timeline
RCREADY CAPITAL CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2022Q4: restricted; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 838,856 shares 838,856$6.4M1.27%newTimeline
SBNYSIGNATURE BANKQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2022Q4: restricted; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 400,000 shares 400,000$800K0.16%0Timeline

Sold out in Q3 2024

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
IIIVI3 VERTICALS INC337,099$7.44Mshares

How Q3 2024 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001104659-24-118983 base2024-11-14acceptance time not in the bulk data set