Lonestar Capital Management LLC holds a focused book of 26 reported positions worth $155.3M as of Q2 2026 (disclosed Aug 14, 2026, a ~45-day 13F lag). This quarter they opened Covista Inc and trimmed Garrett Motion Inc. Their largest long position is Garrett Motion Inc at 13% of the reported non-option book. They also disclosed $185.7M in put options (a bearish bet) and $4.4M in call options (bullish), shown separately below and excluded from the non-option book. Cloning the disclosed picks since 2025 would be +39% (+35.0%/yr). That is a simulation of the disclosed long book, not audited returns.
Following at the filing date actually beat the quarter-end book by 8.6 points over this window.
Growth of $10,000 cloning Lonestar Capital Management LLC's disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~45 days for the latest filing, with no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.
Top-heavy: focused book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
96% mapped to company sectors
+3 sectors below the cut, 5% together
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices (an exit at the prior quarter-end), no cost basis
Other tracked managers holding the same core names as Lonestar Capital Management LLC
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| LSP Investment Advisors, LLC | 3 / 26 | $61.3M |
| Magarian Capital Management, LLC | 3 / 26 | $79.8M |
| Flat Footed LLC | 4 / 26 | $320.2M |
| Praetorian PR LLC | 2 / 26 | $64.9M |
| Nierenberg Investment Management Company, LLC | 4 / 26 | $38.1M |
| Delphi Financial Group, Inc. | 3 / 26 | $36.8M |
| Cobalt Capital Management, Inc. | 3 / 26 | $23.8M |
| Rubric Capital Management LP | 5 / 26 | $1.8B |
Ranked by the share of each fund's own book sitting in the names it shares with Lonestar Capital Management LLC: only funds sharing at least a tenth of the book qualify. Index giants, bank custody books and market makers are excluded. They hold everything, so their overlap says nothing.
Bars show each position's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Garrett Motion Inc COM | $19.9M | 550.0K | 12.8% | ▼−31% Reduced · −250K sh | |
| 2 | Energy Transfer L P COM UT LTD PTN | $17.2M | 900.0K | 11.1% | —Held | |
| 3 | Global Ship Lease Inc COM CL A | $10.9M | 290.0K | 7.0% | ▲+81% Added · +130K sh | |
| 4 | Diversified Healthcare TR COM SH BEN INT | $9.8M | 1.05M | 6.3% | ▼−34% Reduced · −550K sh | |
| 5 | Target Hospitality Corp COM | $8.8M | 433.1K | 5.7% | ▲+15% Added · +58K sh | |
| 6 | Brookdale SR Living Inc COM | $8.7M | 540.0K | 5.6% | ▼−18% Reduced · −120K sh | |
| 7 | Covista Inc COM | $6.9M | 55.0K | 4.4% | ▲New New position | |
| 8 | Vistra Corp COM | $6.3M | 40.0K | 4.1% | ▼−20% Reduced · −10K sh | |
| 9 | Talen Energy Corp COM | $6.1M | 16.0K | 4.0% | ▼−47% Reduced · −14K sh | |
| 10 | Vaneck ETF Trust GOLD MINERS ETF | $6.0M | 80.0K | 3.9% | —Held | |
| 11 | Dauch Corp COM | $5.1M | 950.0K | 3.3% | ▼−37% Reduced · −550K sh | |
| 12 | Celanese Corp Del COM | $5.1M | 110.0K | 3.3% | ▼−45% Reduced · −90K sh | |
| 13 | Expand Energy Corporation COM | $5.0M | 55.0K | 3.2% | ▼−35% Reduced · −30K sh | |
| 14 | Lincoln Edl Svcs Corp COM | $4.2M | 83.9K | 2.7% | ▼−44% Reduced · −66K sh | |
| 15 | Dow Hldgs Inc COM | $4.1M | 150.0K | 2.6% | ▼−17% Reduced · −30K sh | |
| 16 | NRG Energy Inc COM NEW | $3.9M | 27.0K | 2.5% | ▼−55% Reduced · −33K sh | |
| 17 | Kyivstar Group Ltd ORD SHS | $3.9M | 240.0K | 2.5% | ▲New New position | |
| 18 | Lumen Technologies Inc COM | $3.8M | 500.0K | 2.5% | ▲+18% Added · +75K sh | |
| 19 | Universal Technical Inst Inc COM | $3.6M | 85.0K | 2.3% | —Held | |
| 20 | Eqt Corp COM | $3.2M | 60.0K | 2.1% | ▼−33% Reduced · −30K sh | |
| 21 | Lyondellbasell Industries NV SHS - A - | $3.2M | 60.0K | 2.0% | —Held | |
| 22 | Transocean Ltd REGISTERED SHS | $2.3M | 475.0K | 1.5% | ▼−47% Reduced · −425K sh | |
| 23 | Seadrill Ltd COM | $2.1M | 55.0K | 1.3% | ▼−45% Reduced · −45K sh | |
| 24 | Galaxy Digital Inc. CL A | $1.9M | 70.0K | 1.2% | ▲New New position | |
| 25 | Adt Inc Del COM | $1.6M | 250.0K | 1.0% | ▲New New position | |
| 26 | Service Pptys TR COM SH BEN INT | $1.5M | 900.0K | 1.0% | ▲New New position |
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1317410/holdings"
Use Arkolith to show LONESTAR CAPITAL MANAGEMENT LLC's latest holdings, largest changes, and filing provenance.
Put / call positions from the 13F — totals include every disclosed option leg
| Type | Underlying | Notional value | Underlying shares |
|---|---|---|---|
| PUT · bearish | SS SPDR S&P 500 ETF TRUST-USSPY | $112.0M | 2K |
| PUT · bearish | INVESCO QQQ TRUST SERIES 1QQQ | $73.6M | 1K |
| CALL · bullish | TRANSOCEAN LTDRIG | $4.4M | 9K |
13F filers disclose option positions at the market value of the underlying the contracts reference, not the premium paid. A put is a bearish bet (it gains if the stock falls); a call is bullish. “Underlying shares” is the share count the contracts control, not a share holding. These legs are excluded from the non-option book, weighting, concentration and sector figures above.
As-of date vs the date the SEC received each filing
Reported 13F total per quarter. Raw filing totals can include option notional.
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. Book totals and portfolio weights cover reported non-option positions, which can include notes and warrants. Disclosed put/call options are listed separately and excluded from those totals. The performance line is a simulation of the disclosed long book, not an audited return.