MASON CAPITAL MANAGEMENT LLC 13F: Quarter-over-Quarter Portfolio Changes
MASON CAPITAL MANAGEMENT LLC reported a disclosed portfolio value of approximately $607.0 million in its latest SEC Form 13F-HR filing for Q2 2026, down 1.0% quarter on quarter. Over the quarter, the fund initiated 2 new positions, bought more shares in 2 holdings, and trimmed 1 holding.
MASON CAPITAL MANAGEMENT LLC's top buy was a new stake in Groupon INC (GRPN) , equal to 2.6% of the disclosed portfolio. Its top sell was Enviri CORP (NVRI) . The fund sold 60.6% of its previously reported shares, reducing the position's portfolio weight by 8.0 percentage points.
New PositionsQ2 2026
Securities disclosed for the first time in Q2 2026 that were not present in the prior 13F-HR filing.
| Company | Ticker | Initial Portfolio Weight | History |
|---|---|---|---|
| GROUPON INC | GRPN | 2.6% | History → |
| CONTEXTLOGIC HOLDINGS INC | LOGC | 0.4% | History → |
Top BuysQ2 2026
The fund's top buys among existing positions in Q2 2026. Ranked by portfolio-weight impact, with the percentage of additional shares shown separately.
| Company | Ticker | Portfolio Weight Change | More Shares | History |
|---|---|---|---|---|
| JELD-WEN HOLDING INC | JELD | +0.6% | +300.3% | History → |
| BROOKDALE SENIOR LIVING INC | BKD | +1.8% | +15.3% | History → |
Top SellsQ2 2026
The fund's top sells among positions it retained in Q2 2026. Ranked by portfolio-weight impact. Full exits are listed separately.
| Company | Ticker | Portfolio Weight Change | Shares Sold | History |
|---|---|---|---|---|
| ENVIRI CORP | NVRI | -8.0% | 60.6% | History → |
Net Portfolio Value ChangeQ2 2026
- $0.6BPrior quarter
- $0.6BCurrent quarter
- $-0.0BNet delta
- -1.0%% change
Methodology & FAQ
How MASON CAPITAL MANAGEMENT LLC Quarterly Changes Are Computed
All deltas are sourced from sequential SEC Form 13F-HR filings for MASON CAPITAL MANAGEMENT LLC: each row joins the most recent filing against the immediately preceding quarterly filing for the same fund. Share-count changes reflect reported trading activity, while portfolio weights can also move because of market price changes. Portfolio weights are normalized to exclude listed options for comparability. A complete description, including how confidential treatment filings are handled, is documented in the Methodology.
What stocks did MASON CAPITAL MANAGEMENT LLC buy in Q2 2026?
In Q2 2026, MASON CAPITAL MANAGEMENT LLC initiated 2 new positions (GROUPON INC (GRPN), CONTEXTLOGIC HOLDINGS INC (LOGC)); bought more shares of JELD-WEN HOLDING INC (JELD), BROOKDALE SENIOR LIVING INC (BKD).
What stocks did MASON CAPITAL MANAGEMENT LLC sell in Q2 2026?
In Q2 2026, MASON CAPITAL MANAGEMENT LLC reduced holdings in ENVIRI CORP (NVRI).
Which positions did MASON CAPITAL MANAGEMENT LLC initiate in Q2 2026?
MASON CAPITAL MANAGEMENT LLC established 2 new positions in Q2 2026: GROUPON INC (GRPN, 2.6%), CONTEXTLOGIC HOLDINGS INC (LOGC, 0.4%).
Which existing positions saw the largest allocation increases for MASON CAPITAL MANAGEMENT LLC in Q2 2026?
Of 2 existing positions with share-count increases in Q2 2026, the largest were: JELD-WEN HOLDING INC (JELD, +0.6% weight, +300.3% shares), BROOKDALE SENIOR LIVING INC (BKD, +1.8% weight, +15.3% shares).
Which positions did MASON CAPITAL MANAGEMENT LLC fully exit in Q2 2026?
MASON CAPITAL MANAGEMENT LLC fully exited no positions in Q2 2026.
Which existing positions saw the largest allocation reductions for MASON CAPITAL MANAGEMENT LLC in Q2 2026?
Of 1 existing position with share-count reductions in Q2 2026, the largest were: ENVIRI CORP (NVRI, -8.0% weight, -60.6% shares).
Do quarter-over-quarter 13F allocation changes constitute explicit trading signals?
No. Quarter-over-quarter changes reflect a combination of active trading and market price movement. A weight increase can result from price appreciation alone, without the manager adding shares. Share-count delta is the cleaner indicator of explicit trading activity. All deltas on this page are sourced from sequential SEC Form 13F-HR filings.