Ownership history in Penbrook Management LLC Β· 33 quarters on record
This page tracks every 13F SEC filing in which Penbrook Management LLC reported a position in KOPIN CORP (KOPN). 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 +53.0% annually on this KOPN position. Timing score: 52% (12/23 decisions correct). Average cost basis: $2.48. Maximum drawdown during holding period: β91.1%.
π₯ Exceptional β beat the S&P 500 by 53.0% per year on this position.
32 quarters analyzed
β‘οΈ Neutral timing β roughly coin-flip accuracy on add/trim calls.
12 of 23 add/trim decisions correct
Best entry: $0.93 (2025 Q1) Β· Worst: $10.49 (2021 Q1)
πͺ Held through 2 major drawdowns (>20%).
10 adds Β· 14 trims. Bought during 3 of 21 down-price quarters. π Predominantly trimming β distribution phase.
π Penbrook Management LLC has been actively increasing its KOPN allocation β a bullish signal from insiders.
Currently 0.19% 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