PI Form 4: Diorio Vesting Converts RSUs; Tax Withholding at $184.97
Rhea-AI Filing Summary
Chris Diorio, CEO and director of Impinj Inc. (PI), reported multiple transactions tied to the vesting of restricted stock units (RSUs) on 09/23/2025. Portions of RSU grants vested and were converted into common stock: 2,594; 1,224; and 1,818 shares were recorded as acquired under Rule 16b-3 exemptions, increasing his direct holdings. Concurrently, 2,219 shares were remitted to Impinj to satisfy tax withholding at a price of $184.97 per share. After these transactions, Diorio beneficially owns 356,724 shares directly and 199,362 shares indirectly through DFT L.L.C.
Positive
- Disclosure compliance: Form 4 timely discloses RSU vesting and tax-withholding disposition, meeting Section 16 reporting requirements
- Clear ownership detail: Filing reports both direct (356,724 shares) and indirect (199,362 shares via DFT L.L.C.) beneficial ownership
Negative
- None.
Insights
TL;DR: CEO received vested RSUs and remitted shares for taxes; meaningful insider activity but no open market sales reported.
All reported non-derivative and derivative transactions on 09/23/2025 relate to RSU vesting events. The form shows three RSU vesting tranches converted to common stock (2,594; 1,224; 1,818) and an exempt disposition of 2,219 shares to satisfy withholding at $184.97 per share. The filings confirm both direct and indirect beneficial ownership: 356,724 shares direct and 199,362 indirect via DFT L.L.C. This is routine compensation-related activity, not an open-market sale or acquisition for investment purposes, and contains no new forward-looking corporate actions or material corporate events.
TL;DR: Transactions are standard executive equity vesting and tax withholding; disclosure aligns with Rule 16 reporting.
The Form 4 documents vesting from prior RSU grants dated March 23, 2022/2023/2024, each with one-sixteenth vesting on 09/23/2025. The exempt disposition under Rule 16b-3(e) for tax withholding is explicitly noted. The signature by an attorney-in-fact and the detailed explanatory footnotes meet typical disclosure standards. There are no indications of additional related-party transfers or deviation from customary equity compensation procedures in this filing.
Insider Trade Summary
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Restricted Stock Units | 2,594 | $0.00 | -- |
| Exercise | Restricted Stock Units | 1,224 | $0.00 | -- |
| Exercise | Restricted Stock Units | 1,818 | $0.00 | -- |
| Exercise | Common Stock | 2,594 | $0.00 | -- |
| Exercise | Common Stock | 1,224 | $0.00 | -- |
| Exercise | Common Stock | 1,818 | $0.00 | -- |
| Tax Withholding | Common Stock | 2,219 | $184.97 | $410K |
| holding | Common Stock | -- | -- | -- |
Footnotes (1)
- In an exempt disposition to the Issuer under Rule 16b-3(e), the Reporting Person remitted shares to the Issuer in connection with the satisfaction of tax withholding obligations arising out of the vesting of restricted stock units, or RSUs. Each RSU represents a contingent right to receive one share of Impinj common stock. On March 23, 2022, the reporting person was granted 41,500 RSUs. One-sixteenth of these vested on September 23, 2025. On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on September 23, 2025. On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on September 23, 2025.
