Cathal Phelan, See Explanation of Responses, Ten Percent Owner at Integrated Silicon Solution, holds 15.80K shares in IMPINJ (Ticker: PI), holds 1.00K shares in Integrated Silicon Solution (Ticker: ISSI), holds 25.00K shares in Micrel Inc (Ticker: MCRL). Most recently, Cathal Phelan Sold ― shares of IMPINJ on Apr 30, 2024 for an estimated value of 1.48M.