Chris Diorio, Ph.D., chief executive officer of Impinj (PI), has filed 70 Form 4 transactions with the SEC, all in the single company. The pattern is one of compensation and tax mechanics rather than open-market trading. Over the tracked period, Diorio has recorded zero open-market purchases and zero open-market sales. His total sell value of $7,348,829.85 comes entirely from automatic dispositions, primarily "F" codes, which are shares withheld to cover tax obligations on vested equity.
The most recent activity, dated September 23, 2026, shows two option exercises ("M" codes) valued at zero, alongside a tax withholding of $212,108.40. Similar clusters appear on August 20, June 23, and March 23 of the same year, each pairing option exercises with tax-related withholdings. These are mechanical events tied to vesting schedules. Diorio also made several gifts ("G" codes) in September, August, July, June, and February, all valued at zero, which transfer shares without any cash changing hands.
The largest single transaction was a "J" code on May 26, 2026, valued at $28,201,500. That code is not in the standard legend provided, but it dwarfs all other activity and likely represents a conversion or other non-cash adjustment. The total acquired value of $28,201,500 matches this one entry, meaning all other acquisitions were option exercises at zero cost. Diorio has not bought shares on the open market at any point in this filing history, and his only sales are the automatic tax withholdings. The direction is consistent: equity grants, option exercises, and mandatory share surrenders, with no discretionary buying or selling.
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