Ownership history in Penbrook Management LLC Β· 8 quarters on record
This page tracks every 13F SEC filing in which Penbrook Management LLC reported a position in AEHR TEST SYS (AEHR). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price β sourced directly from SEC EDGAR 13F filings.
π Penbrook Management LLC outperformed the S&P 500 by +93.4% annually on this AEHR position. Timing score: 40% (2/5 decisions correct). Average cost basis: $24.28. Maximum drawdown during holding period: β56.2%.
π₯ Exceptional β beat the S&P 500 by 93.4% per year on this position.
6 quarters analyzed
β οΈ Poor timing β buys often preceded drops, trims preceded rallies.
2 of 5 add/trim decisions correct
Best entry: $7.29 (2025 Q1) Β· Worst: $30.11 (2025 Q3)
πͺ Held through 2 major drawdowns (>20%).
5 adds Β· 2 trims. Bought during 1 of 2 down-price quarters. π Consistently bullish β fund kept accumulating this position.
π Penbrook Management LLC has been actively increasing its AEHR allocation β a bullish signal from insiders.
Currently 1.6% of portfolio
β Based on quarterly 13F SEC filings and end-of-quarter closing prices. Timing score = accuracy of add/trim decisions vs next-quarter price direction. Alpha = mean quarterly excess return Γ 4 (annualised). Not investment advice.
As of 2025 Q4 β sorted by position size