DOSSIER · 13F-HR · Q1 2026

140 Summer Partners LP

$1.6B in tracked AUM across 25 positions as of Q1 2026.

1S
CIK 0001820788 · last filed Mar 31, 2026
Total AUM
$1.6B
as of Q1 2026
Holdings
25
positions
Whale Score
70
70
strong
Activity
no data
changes this Q
AI Analysis · Q1 2026

Based on the SEC 13F filing data provided for 140 Summer Partners LP as of September 30, 2025, here is a comprehensive financial analysis.

1. Portfolio Overview

140 Summer Partners LP manages a concentrated portfolio totaling approximately $669.67 million across 12 holdings. The firm demonstrates a high-conviction strategy characterized by low turnover in terms of holding count but significant capital reallocation between quarters. The portfolio experienced a substantial decrease in...

2. Key Holdings

The portfolio is anchored by large-cap positions in financial services and industrials.

  • Capital One Financial (COF): This is the largest holding, comprising 16.85% of the portfolio ($112.85M). The firm increased its stake by 6.5% during the quarter, adding $6.79M, indicating strong conviction in the financial sector, specifically in consumer banking and credit lending.
  • CRH PLC: Representing 11.87% of the portfolio ($79.46M), this building materials supplier received the largest relative capital injection among top-tier holds, with a value increase of 4.1%. This suggests a bullish view on infrastructure and construction materials.
  • AerCap Holdings (AER): The third-largest holding at 11.70% ($78.38M), AerCap is an aircraft leasing company. Despite being a top position, the firm reduced this stake by 15.0% ($10.79M), potentially taking profits or managing risk exposure to the aviation sector.
  • Mr. Cooper Group (07WA): A significant financial services position accounting for 10.43% ($69.85M). Notably, this position was reduced by 29.4% during the quarter, a substantial trim that implies the manager is prioritizing capital elsewhere or de-risking.
  • Vistra Corp (VST): The top utility holding represents 8.58% ($57.45M). While a core position, it was reduced by 8.3%, aligning with a trend of trimming exposure to existing winners to fund new ideas.

3. Sector Allocation

The portfolio displays a distinct tilt toward Financial Services and Industrials/Unknown (likely encompassing international industrials or diversified holdings).

  • Financial Services: This is the largest identified sector, totaling $237.97M (approximately 35.5% of the portfolio). Concentration is high here, driven primarily by COF, Mr. Cooper, and the new position in PennyMac Financial Services (PFSI).
  • Unknown ($298.95M): A significant portion of the portfolio (44.6%) is classified as "Unknown" in the data breakdown. Given the presence of CRH PLC, AerCap, and Viking Holdings in the top holdings list, it is highly probable that these positions fall under this classification due to categorization nuances regarding international entities or sector classification. Adjusting for this, the "Industrials/Travel/Leasing" exposure is massive, likely rivaling or exceeding Financial Services.
  • Consumer Cyclical & Utilities: These sectors represent smaller but meaningful slices, at 8.8% (SomnioGroup) and 8.6% (Vistra), respectively. The "Technology" sector is minimal, comprising only 2.4% (Acuity Brands).

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
IWM
ISHARES TR
$274M1.1M16.7%
02
UAL
UNITED AIRLS HLDGS INC
$125M1.4M7.7%
03
MTZ
MASTEC INC
$106M329K6.5%
04
N00985106
AERCAP HOLDINGS NV
$104M759K6.4%
05
PCG
PG&E CORP
$87M4.9M5.3%
06
G93A5A101
VIKING HOLDINGS LTD
$84M1.1M5.2%
07
GLPI
GAMING & LEISURE PPTYS INC
$83M1.9M5.1%
08
TMUS
T-MOBILE US INC
$81M387K5.0%
09
KGS
KODIAK GAS SVCS INC
$76M1.3M4.6%
10
VST
VISTRA CORP
$73M483K4.4%

Filing history

2026Q1Mar 31
$1.6B 20.9%
25 positionsView →
2025Q4Dec 31
$1.4B 102.1%
22 positionsView →
2025Q3Sep 30
$670M 23.3%
12 positionsView →
2025Q2Jun 30
$873M 79.0%
17 positionsLocked
2025Q1Mar 31
$488M 41.7%
12 positionsLocked
2024Q4Dec 31
$836M 9.9%
18 positionsLocked
2024Q3Sep 30
$928M 11.7%
21 positionsLocked
2024Q2Jun 30
$831M 3.1%
18 positionsLocked
2024Q1Mar 31
$806M 38.8%
17 positionsLocked
2023Q4Dec 31
$580M 13.2%
12 positionsLocked
2023Q3Sep 30
$513M 13.9%
13 positionsLocked
2023Q2Jun 30
$450M 19.3%
9 positionsLocked
Showing 12 of 22