DOSSIER · 13F-HR · Q1 2026

LONESTAR CAPITAL MANAGEMENT LLC

$671M in tracked AUM across 32 positions as of Q1 2026.

LC
CIK 0001317410 · last filed Mar 31, 2026
Total AUM
$671M
as of Q1 2026
Holdings
32
positions
Whale Score
71
71
strong
Activity
no data
changes this Q
AI Analysis · Q1 2026

Portfolio Overview

Lonestar Capital Management LLC reported a total portfolio value of $300.29 million as of September 30, 2025, representing a notable increase of 11.4% from the previous quarter's $269.59 million. The portfolio is highly concentrated, comprising only 16 holdings. The investment strategy appears to be a "core and satellite" approach, where the vast majority of assets are allocated to a passive core position tracking the broader market, while a smaller portion is actively ma...

Key Holdings

The portfolio is dominated by a single position: the SPDR S&P 500 ETF Trust (SPY). This holding alone is valued at $199.85 million, representing a massive 66.55% of the total assets. The manager increased this stake by 20.0% during the quarter, adding $45.39 million, signaling a preference for broad market exposure as the foundation of the portfolio.

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
QQQ
INVESCO QQQ TR
$115M2K17.2%
02
HYG
ISHARES TR
$111M14K16.6%
03
SPY
STATE STR SPDR S&P 500 ETF T
$104M2K15.5%
04
TLT
ISHARES TR
$87M10K12.9%
05
IWM
ISHARES TR
$50M2K7.4%
06
PCG
PG&E CORP
$24M390K3.6%
07
ET
ENERGY TRANSFER L P
$17M900K2.6%
08
GTX
GARRETT MOTION INC
$15M800K2.2%
09
CE
CELANESE CORP DEL
$13M200K2.0%
10
DHC
DIVERSIFIED HEALTHCARE TR
$11M1.6M1.6%

Filing history

2026Q1Mar 31
$671M 7.5%
32 positionsView →
2025Q4Dec 31
$624M 107.9%
31 positionsView →
2025Q3Sep 30
$300M 11.4%
16 positionsView →
2025Q2Jun 30
$270M 3.3%
18 positionsLocked
2025Q1Mar 31
$261M 4.7%
18 positionsLocked
2024Q4Dec 31
$274M 53.7%
22 positionsLocked
2024Q3Sep 30
$591M 558.0%
20 positionsLocked
2024Q2Jun 30
$90M 92.0%
13 positionsLocked
2024Q1Mar 31
$1.1B 63.7%
22 positionsLocked
2023Q4Dec 31
$684M 2.9%
21 positionsLocked
2023Q3Sep 30
$704M 35.8%
27 positionsLocked
2023Q2Jun 30
$1.1B 76.5%
29 positionsLocked
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