Ownership history in CASTLEARK MANAGEMENT LLC Β· 84 quarters on record
This page tracks every 13F SEC filing in which CASTLEARK MANAGEMENT LLC reported a position in APPLE COMPUTER INC COM (AAPL). 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 CASTLEARK MANAGEMENT LLC outperformed the S&P 500 by +58.0% annually on this AAPL position. Timing score: 42% (34/81 decisions correct). Average cost basis: $43.00. Maximum drawdown during holding period: β56.9%.
π₯ Exceptional β beat the S&P 500 by 58.0% per year on this position.
82 quarters analyzed
β οΈ Poor timing β buys often preceded drops, trims preceded rallies.
34 of 81 add/trim decisions correct
Best entry: $0.22 (2002 Q3) Β· Worst: $271.61 (2025 Q4)
πͺ Held through 5 major drawdowns (>20%). Diamond-hands conviction.
32 adds Β· 51 trims. Bought during 10 of 26 down-price quarters. π Predominantly trimming β distribution phase.
π Portfolio weight has been declining in recent quarters. Possible distribution phase.
Currently 3.09% 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