Long-term investor

Penbrook Management LLC @penbrookmanagementllc

Institutional investment manager. Holdings disclosed quarterly to the SEC on Form 13F (CIK 0001381055).

Record

  • Tracked since 2025-06-30 (431 days), 131 trades recorded
  • Returns: week n/a · month n/a · 90 days +10.6% · 6 months +5.8% · 1 year +12.8% · all +12.8%
  • Max drawdown -6.6% · Sharpe 0.50 · win rate 22% · data quality High
  • Source: SEC 13F Filings (live) (SEC EDGAR; typical delay 45 days)

Open positions

  • NVO · 9.7% · long · since 2025-06-30
  • AMZN · 7.9% · long · since 2025-06-30
  • GOOGL · 5.3% · long · since 2025-06-30
  • MSFT · 5.2% · long · since 2025-06-30
  • 02079K107 · 5.1% · long · since 2025-06-30
  • MCO · 3.9% · long · since 2025-06-30
  • ELVA · 2.2% · long · since 2025-06-30
  • CYRX · 2.0% · long · since 2025-06-30
  • VMD · 2.0% · long · since 2025-06-30
  • MRVL · 1.8% · long · since 2025-09-30
  • PLAB · 1.8% · long · since 2025-06-30
  • 811927102 · 1.8% · long · since 2026-06-30

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