SEC Form 4 · accession 0001677721-26-000018
IMPINJ INC · PI
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Chris Diorio Ph.D.
Officer — CHIEF EXECUTIVE OFFICER · Director
Period of report
Sep 23, 2026
Accepted (ET)
Sep 24, 2026 · 6:07 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001114995
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock | Sep 23, 2026 | M | 1,224 | $0.00 | A | 355,645 | D | |
| Common Stock | Sep 23, 2026 | M | 1,817 | $0.00 | A | 357,462 | D | |
| Common Stock | Sep 23, 2026 | F | 1,197 | $177.20 | D | 356,265 | D | |
| Common Stock | holding | — | — | — | 199,362 | I | by DFT L.L.C. |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitsF2,F3 | $0.00 | Sep 23, 2026 | M | 1,224 | D | — | — | Common Stock | 1,224 | 2,448 | D |
| Restricted Stock UnitsF2,F4 | $0.00 | Sep 23, 2026 | M | 1,817 | D | — | — | Common Stock | 1,817 | 10,904 | D |
Explanation of responses
- F1In 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.
- F2Each RSU represents a contingent right to receive one share of Impinj common stock.
- F3On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on September 23, 2026.
- F4On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on September 23, 2026.