Mason Capital Management 13F annual report

Mason Capital Management is an investment fund managing more than $538 billion ran by John Grizzetti. There are currently 6 companies in Mr. Grizzetti’s portfolio. The largest investments include Ats Corporation and Barnes, together worth $507 billion.

$538 billion Assets Under Management (AUM)

As of 7th August 2024, Mason Capital Management’s top holding is 14,349,765 shares of Ats Corporation currently worth over $464 billion and making up 86.1% of the portfolio value. In addition, the fund holds 1,050,079 shares of Barnes worth $43.5 billion, whose value grew 7.0% in the past six months. The third-largest holding is Clear Channel Outdoor Hldgs worth $13.9 billion and the next is Veradigm Inc worth $8.91 billion, with 938,238 shares owned.

Currently, Mason Capital Management's portfolio is worth at least $538 billion. The total portfolio value may be much higher due to cash assets that are not publicly disclosed such as fixed income, real estate, or cash equivalents.

Careers at Mason Capital Management

The Mason Capital Management office and employees reside in New York, New York. According to the last 13-F report filed with the SEC, John Grizzetti serves as the Chief Operating Officer at Mason Capital Management.

Recent trades

In the most recent 13F filing, Mason Capital Management revealed that it had opened a new position in i3 Verticals Inc and bought 337,099 shares worth $7.44 billion. This means they effectively own approximately 0.1% of the company. i3 Verticals Inc makes up 45.5% of the fund's Technology sector allocation and has decreased its share price by 9.2% in the past year.

The investment fund also strengthened its position in Barnes by buying 259,957 additional shares. This makes their stake in Barnes total 1,050,079 shares worth $43.5 billion. Barnes dropped 0.7% in the past year.

On the other hand, there are companies that Mason Capital Management is getting rid of from its portfolio. Mason Capital Management closed its position in Seadrill 2021 Limited on 14th August 2024. It sold the previously owned 398,629 shares for $20.1 billion.

One of the average hedge funds

The two most similar investment funds to Mason Capital Management are Glen Eagle Advisors and Dendur Capital L.P.. They manage $538 billion and $539 billion respectively.

John Grizzetti investment strategy

Mason Capital Management’s portfolio is diversified across 4 sectors. Currently, their heaviest sector is Industrials — making up 8.1% of the total portfolio value. The fund focuses on investments in the United States as 66.7% of the portfolio companies are based in the United States.

The majority of the companies in the fund’s portfolio are large-cap stocks. Stocks with a size of more than $10 billion in market cap make up approximately 0.1% of the total holdings value. On the other hand, small-cap stocks make up only approximately 0.1% of the portfolio. The average market cap of the portfolio companies is close to $3.05 billion.

The complete list of Mason Capital Management trades based on 13F SEC filings

These positions were updated on August 14th based on the fund’s latest 13F filing. Quickly find out what the most recently closed or increased positions are.

Security	Shares Owned	Value	Allocation
Ats Corporation	No change 14,349,765	$463,640,907,000	86.14%
Barnes Group Inc.	32.90% 1,050,079	$43,483,771,000	8.08%
Seadrill 2021 Limited	Closed 398,629	$20,051,039,000
Clear Channel Outdoor Hldgs	No change 9,828,401	$13,858,045,000	2.57%
Veradigm Inc	No change 938,238	$8,913,261,000	1.66%
i3 Verticals Inc	Opened 337,099	$7,443,146,000	1.38%
Signature Bank	No change 400,000	$876,000,000	0.16%
No transactions found
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