Clifford Sosin - CAS Investment Partners Investment Strategy (Sep 30, 2025)


As of Sep 30, 2025, the CAS Investment Partners portfolio managed by Clifford Sosin demonstrates a sophisticated investment approach with 6 positions and an average holding period of 935 quarters. The strategy focuses on Communication Services, Consumer Cyclical, Financial Services, Industrials sectors with a typical position size of 21.0% of the portfolio.


The portfolio's risk management approach includes a maximum position size of 21.02% and sector diversification of 4%, exemplified by the case study of CARVANA CO (CVNA). This strategic framework provides insights into Clifford Sosin's investment philosophy, risk management practices, and long-term value creation approach.

Investment Strategy Metrics

Key metrics revealing investment style, risk management, and performance characteristics

MetricValueCategoryDescription
Holding Period2.6 yearsStyleAverage duration positions are maintained
Position Count6StyleNumber of active positions in portfolio
Position Size21.0%RiskTypical allocation per position
Win Rate58.8%PerformancePercentage of profitable positions
Average Return18.2%PerformanceMean return across positions
Sharpe Ratio0.35PerformanceReturn per unit of risk taken

Investment Case Study: CARVANA CO (CVNA)

3/31/2018 - 12/26/2025

Performance Metrics

Total Return: 429.42%

Holding Period: 2827 days

Max Position Size: $1,844,580,620.00

Position Weight: 47.50%

Key Events

3/31/2018: ENTRY(2,008,068.00 shares) @ $0.02
6/30/2018: INCREASE(48,091.00 shares) @ $0.05
12/31/2018: INCREASE(111,607.00 shares) @ $0.03
3/31/2019: INCREASE(357,565.00 shares) @ $0.06
6/30/2019: INCREASE(10,000.00 shares) @ $0.06
9/30/2019: INCREASE(69,500.00 shares) @ $0.07
12/31/2019: INCREASE(170,087.00 shares) @ $0.09
3/31/2020: INCREASE(1,049,366.00 shares) @ $0.06
6/30/2020: DECREASE(-450,000.00 shares) @ $0.13
9/30/2020: INCREASE(232,690.00 shares) @ $0.22
12/31/2020: DECREASE(-401,946.00 shares) @ $0.24
3/31/2021: INCREASE(100,000.00 shares) @ $0.26
12/31/2021: INCREASE(9,275.00 shares) @ $0.23
3/31/2022: INCREASE(848,600.00 shares) @ $0.12
6/30/2022: INCREASE(2,564,900.00 shares) @ $0.02
9/30/2022: INCREASE(100,000.00 shares) @ $0.02
3/31/2024: DECREASE(-296,909.00 shares) @ $87.91
9/30/2024: DECREASE(-77,300.00 shares) @ $174.11
12/31/2024: DECREASE(-75,797.00 shares) @ $203.36
3/31/2025: DECREASE(-692,768.00 shares) @ $209.08
6/30/2025: DECREASE(-762,761.00 shares) @ $336.96
9/30/2025: DECREASE(-32,594.00 shares) @ $377.24

Investment Thesis

Entry Context: Initial position established based on fundamental analysis

Sector Conditions: Favorable market conditions in the sector

Risk Factors:
  • Market volatility
  • Sector-specific risks

Key Learnings

  • Position sizing is critical for portfolio management
  • Important to monitor sector exposure

Sector Allocations