1y return−6.8%S&P 500 +20.9%
These returns are for its stock picks as disclosed on Form 13F: last quarter's holdings, valued at this quarter's prices. They miss trades within each quarter, short positions, options, bonds, cash and fees, so they aren't the returns its clients got.
$100 invested in its stock picks
Since June 30, 2024: $91 against $137 in the S&P 500.2
Mason Capital Management LLCS&P 500 (SPY)
Top holdings
At the end of June 30, 2026. Change is in shares since the quarter before.2
| Stock | Value | Share of portfolio | Change |
|---|---|---|---|
| ATSAts Corporation | $472.1M | 77.8% | |
| BKDBrookdale Senior Living Inc | $41.4M | 6.8% | +15.3% |
| Enviri CorpCUSIP 415864107 | $38.9M | 6.4% | −21.2% |
| Clear Channel Outdoor HldgsCUSIP 18453H106 | $23.8M | 3.9% | |
| GRPNGroupon Inc | $15.8M | 2.6% | New |
| RCReady Capital Corp | $7.6M | 1.2% | |
| JELDJeld-wen Holding Inc | $4.7M | 0.8% | +300.3% |
| LOGCContextlogic Holdings Inc | $2.6M | 0.4% | New |
| SBNYSignature Bank | $180K | 0.0% |
Best picks still held
How each current holding has done since the quarter it first appeared in its filings (up to six years back).
| Stock | Held since | Return since | Now worth |
|---|---|---|---|
| BKDBrookdale Senior Living Inc | September 30, 2025 | +90.0% | $41.4M |
| JELDJeld-wen Holding Inc | March 31, 2026 | +21.0% | $4.7M |
| RCReady Capital Corp | December 31, 2025 | −19.7% | $7.6M |
| ATSAts Corporation | June 30, 2023 | −37.5% | $472.1M |
| Enviri CorpCUSIP 415864107 | March 31, 2026 | −45.6% | $38.9M |
| SBNYSignature Bank | March 31, 2024 | −80.6% | $180K |
Quarter by quarter
| Quarter | Its picks | S&P 500 |
|---|---|---|
| June 30, 2026 | −3.9% | +14.8% |
| March 31, 2026 | +8.3% | −4.6% |
| December 31, 2025 | +7.4% | +2.4% |
| September 30, 2025 | −16.6% | +7.8% |
| June 30, 2025 | +25.9% | +10.5% |
| March 31, 2025 | −18.3% | −4.6% |
| December 31, 2024 | +4.4% | +2.1% |
| September 30, 2024 | −8.6% | +5.4% |
| March 31, 2024 | −17.4% | +10.0% |
| December 31, 2023 | −5.9% | +11.2% |
| September 30, 2023 | −4.7% | −3.6% |
| June 30, 2023 | +2.1% | +8.3% |
| March 31, 2023 | +1.6% | +7.0% |
| December 31, 2022 | +14.2% | +7.1% |
| September 30, 2022 | −1.2% | −5.3% |
| March 31, 2022 | +18.6% | −4.9% |
| December 31, 2021 | +10.7% | +10.7% |
| September 30, 2021 | −4.9% | +0.3% |
Sources
Every number on this page points here. Each one links to the public record.
- 1SEC EDGAR: Mason Capital Management LLC Form 13F filingshttps://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1218735&type=13F-HR&dateb=&owner=include&count=40CIK 1218735
- 2SEC: 13F for the quarter ended June 30, 2026https://www.sec.gov/Archives/edgar/data/1218735/000110465926097052/Filed August 14, 2026 · accession 0001104659-26-097052