B. Tweedy, Ch. Browne - Tweedy, Browne Co All Funds (US) Investment Strategy (Dec 31, 2025)


As of Dec 31, 2025, the Tweedy, Browne Co All Funds (US) portfolio managed by B. Tweedy, Ch. Browne demonstrates a sophisticated investment approach with 65 positions and an average holding period of 718 quarters. The strategy focuses on Basic Materials, Communication Services, Consumer Cyclical, Consumer Defensive, Energy, Financial Services, Healthcare, Industrials, Technology sectors with a typical position size of 2.4% of the portfolio.


The portfolio's risk management approach includes a maximum position size of 2.35% and sector diversification of 9%, exemplified by the case study of IONIS PHARMACEUTICALS INC. (IONS). This strategic framework provides insights into B. Tweedy, Ch. Browne'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 Period2.0 yearsStyleAverage duration positions are maintained
Position Count65StyleNumber of active positions in portfolio
Position Size2.4%RiskTypical allocation per position
Win Rate46.8%PerformancePercentage of profitable positions
Average Return-0.2%PerformanceMean return across positions
Sharpe Ratio0.00PerformanceReturn per unit of risk taken

Investment Case Study: IONIS PHARMACEUTICALS INC. (IONS)

3/31/2022 - 3/23/2026

Performance Metrics

Total Return: 109,595.33%

Holding Period: 1453 days

Max Position Size: $195,000,612.00

Position Weight: 8.47%

Key Events

3/31/2022: ENTRY(2,925,102.00 shares) @ $0.04
6/30/2022: DECREASE(-198,324.00 shares) @ $0.04
9/30/2022: DECREASE(-3,790.00 shares) @ $0.04
12/31/2022: INCREASE(818,148.00 shares) @ $0.04
3/31/2023: DECREASE(-90.00 shares) @ $0.04
6/30/2023: DECREASE(-188.00 shares) @ $0.04
9/30/2023: DECREASE(-30,685.00 shares) @ $45.36
12/31/2023: DECREASE(-55,497.00 shares) @ $50.59
12/31/2024: DECREASE(-205,813.00 shares) @ $34.96
3/31/2025: DECREASE(-265,345.00 shares) @ $30.17
6/30/2025: DECREASE(-91,570.00 shares) @ $39.51
9/30/2025: INCREASE(9,268.00 shares) @ $65.42
12/31/2025: DECREASE(-436,286.00 shares) @ $79.11

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