Investor Mason Capital Management Llc
13D/G Filings

This page shows a list of all the recent 13D/G filings made by Mason Capital Management Llc . Schedule 13D is commonly referred to as a “beneficial ownership report.” The term "beneficial owner" is defined under SEC rules. It includes any person who directly or indirectly shares voting power or investment power (the power to sell the security).

When a person or group of persons acquires beneficial ownership of more than 5% of a voting class of a company’s equity securities, they are required to file a Schedule 13D within ten days after the purchase. Click the link icon to see the full transaction history.

Date Form Target Prev
Shares
Current
Shares
Change
(Percent)
Ownership
(Percent)
Change
(Percent)
2024-11-13 13G/A ATS / ATS Corporation 18,213,715 15,278,715
2024-02-14 13G ATS / ATS Corporation 18,213,715
2023-07-21 13D/A CLBR / Colombier Acquisition Corp. II 1,291,125 0
2023-07-19 13D/A CLBR / Colombier Acquisition Corp. II 1,291,125 1,291,125
2023-06-26 13D CLBR / Colombier Acquisition Corp. II 1,291,125
2022-02-14 13G/A CCO / Clear Channel Outdoor Holdings, Inc. 30,364,927 22,768,125
2022-01-05 13D/A CXW / CoreCivic, Inc. 6,115,995 4,425,459
2021-11-12 13D CXW / CoreCivic, Inc. 6,115,995
2021-08-16 13G LEGO / Legato Merger Corp 3,168,668
2021-02-09 13G/A CCO / Clear Channel Outdoor Holdings, Inc. 23,881,508 30,364,927
2020-03-12 13G CCO / Clear Channel Outdoor Holdings, Inc. 4,172,946 23,881,508
2017-06-23 13G CFCO / CF Corporation 3,667,925
2015-02-17 13G/A BWXT / BWX Technologies, Inc. 0
2015-02-17 13G/A CCO / Clear Channel Outdoor Holdings, Inc. 4,172,946
2015-02-17 13G/A US5535731062 / MSG Networks Inc 4,384,533
2015-02-17 13G/A US87403A1079 / Tailored Brands, Inc. 0
2014-10-02 13G US5535731062 / MSG Networks Inc 5,179,626
2014-02-28 13G US87403A1079 / Tailored Brands, Inc. 3,038,131
2014-02-14 13G/A CCO / Clear Channel Outdoor Holdings, Inc. 4,172,946
2014-02-14 13G/A BWXT / BWX Technologies, Inc. 11,894,745
2014-02-14 13G/A HMA / Heartland Media Acquisition Corp - Class A 0
2014-01-16 13D/A HUBB / Hubbell Incorporated 630,489
2013-07-05 13G HMA / Heartland Media Acquisition Corp - Class A 13,823,221
2013-02-14 13G/A BWXT / BWX Technologies, Inc. 14,694,745
2013-02-14 13G/A FBHS / Fortune Brands Home & Security Inc 2,704,494
2012-02-14 13G/A CCO / Clear Channel Outdoor Holdings, Inc. 5,072,946
2012-02-14 13G/A BWXT / BWX Technologies, Inc. 14,220,993
2012-02-14 13G/A FBHS / Fortune Brands Home & Security Inc 8,662,696