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Latest MASON CAPITAL MANAGEMENT LLC Stock Portfolio

$612Million– No. of Holdings #7

MASON CAPITAL MANAGEMENT LLC Performance:
2026 Q1: 2.96%YTD: 2.96%2025: -4.06%
Performance for 2026 Q1 is 2.96%, and YTD is 2.96%, and 2025 is -4.06%.

About MASON CAPITAL MANAGEMENT LLC and 13F Hedge Fund Stock Holdings

MASON CAPITAL MANAGEMENT LLC is a hedge fund based in New York, NY. On 2026-05-15, the fund reported it's updated stock portfolio. In the 13F Holdings report, MASON CAPITAL MANAGEMENT LLC reported an equity portfolio of $612.9 Millions as of 31 Mar, 2026.

The top stock holdings of MASON CAPITAL MANAGEMENT LLC are , , BKD. The fund has invested 75.5% of it's portfolio in ATS CORPORATION and 14.4% of portfolio in ENVIRI CORP.

The fund managers got completely rid off SOLSTICE ADV MATERIALS INC, BORR DRILLING LTD (BORR) and MESA LABORATORIES INC (MLAB) stocks. They significantly reduced their stock positions in BROOKDALE SENIOR LIVING INC (BKD). MASON CAPITAL MANAGEMENT LLC opened new stock positions in ENVIRI CORP and JELD-WEN HOLDING INC (JELD). The fund showed a lot of confidence in some stocks as they added substantially to READY CAPITAL CORP (RC) and ATS CORPORATION.
MASON CAPITAL MANAGEMENT LLC Equity Portfolio Value
Last Reported on: 15 May, 2026

MASON CAPITAL MANAGEMENT LLC Annual Return Estimates Vs S&P 500

Our best estimate is that MASON CAPITAL MANAGEMENT LLC made a return of 2.96% in the last quarter. In trailing 12 months, it's portfolio return was 18.96%.
  • Performance
  • S&P 500

New Buys

Ticker$ Bought
enviri corp88,182,800
jeld-wen holding inc963,337
New stocks bought by MASON CAPITAL MANAGEMENT LLC

Additions

Ticker% Inc.
ready capital corp14.4
ats corporation5.4
Additions to existing portfolio by MASON CAPITAL MANAGEMENT LLC

Reductions

Ticker% Reduced
brookdale senior living inc-37.71
MASON CAPITAL MANAGEMENT LLC reduced stake in above stock

Sold off

Ticker$ Sold
borr drilling ltd-8,794,010
jbs n.v.-18,832,500
solstice adv materials inc-30,790,100
mesa laboratories inc-5,518,550
MASON CAPITAL MANAGEMENT LLC got rid off the above stocks

Sector Distribution

MASON CAPITAL MANAGEMENT LLC has about 89.9% of it's holdings in Others sector.

  • Others
  • Healthcare
  • Communication Services
  • Real Estate
Sector%
Others89.9
Healthcare5
Communication Services3.8
Real Estate1.1

Market Cap. Distribution

MASON CAPITAL MANAGEMENT LLC has about 0% of it's portfolio invested in the large-cap and mega-cap stocks.

  • UNALLOCATED
  • MID-CAP
  • SMALL-CAP
  • MICRO-CAP
Category%
UNALLOCATED89.9
MID-CAP5
SMALL-CAP3.8
MICRO-CAP1.3

Stocks belong to which Index?

About 10.1% of the stocks held by MASON CAPITAL MANAGEMENT LLC either belong to S&P 500 or RUSSELL 2000 index.

  • Others
  • RUSSELL 2000
Index%
Others89.9
RUSSELL 200010.1
Top 5 Winners (%)%
BKD
brookdale senior living inc
21.7 %
CCO
clear channel outdoor hldgs
7.2 %
ats corporation
2.3 %
Top 5 Winners ($)$
ats corporation
10.5 M
BKD
brookdale senior living inc
8.4 M
CCO
clear channel outdoor hldgs
1.6 M
Top 5 Losers (%)%
signature bank
-35.6 %
RC
ready capital corp
-24.5 %
Top 5 Losers ($)$
RC
ready capital corp
-2.3 M
signature bank
-0.1 M

MASON CAPITAL MANAGEMENT LLC Holdings Map

This heatmap illustrates the top 50 positions within the fund's portfolio.

Current Stock Holdings of MASON CAPITAL MANAGEMENT LLC

MASON CAPITAL MANAGEMENT LLC has 7 stocks in it's portfolio. RC proved to be the most loss making stock for the portfolio. was the most profitable stock for MASON CAPITAL MANAGEMENT LLC last quarter.

Last Reported on: 15 May, 2026
TickerNamesorted ascending% PortfolioShares Held$ ValueType% ChangeOptions