Ownership history in 13D Management LLC Β· 15 quarters on record
This page tracks every 13F SEC filing in which 13D Management LLC reported a position in MERCURY SYS INC (MRCY). 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 13D Management LLC underperformed the S&P 500 by β1.2% annually on this MRCY position. Timing score: 33% (4/12 decisions correct). Average cost basis: $53.64. Maximum drawdown during holding period: β58.1%.
β οΈ Trailed SPY by 1.2% ann. on this position.
14 quarters analyzed
β οΈ Poor timing β buys often preceded drops, trims preceded rallies.
4 of 12 add/trim decisions correct
Best entry: $29.50 (2024 Q1) Β· Worst: $64.45 (2022 Q1)
πͺ Held through 1 major drawdown (>20%). Strong conviction under pressure.
6 adds Β· 7 trims. Bought during 3 of 7 down-price quarters. π Predominantly trimming β distribution phase.
π 13D Management LLC has been actively increasing its MRCY allocation β a bullish signal from insiders.
Currently 9.01% 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