Impinj, Inc.
A maker of tiny silicon chips and readers that give everyday objects—clothing, luggage, medical supplies—a digital identity, so businesses can track them wirelessly without line-of-sight scanning. Founded in 2000 by University of Washington professor Chris Diorio and his Caltech advisor Carver Mead, the company grew out of their research into self-adaptive silicon chips. Its name is a nod to that science: "Impinj" is an acronym for the process "impact-ionized hot-electron injection" behind their early chip research.
Bought 1.46M · Sold 599.9K
Granted 1.7K · Sold 3.07M
Sold 1.00M
Sold 430.0K
Granted 10.3K
Granted 598.9K · Sold 413.8K
Granted 207.8K · Sold 134.9K
Granted 201.3K · Sold 147.5K
Granted 200.8K · Sold 166.9K
Granted 13.3K · Bought 40.2K
Granted 5.3K · Sold 7.2K
Granted 2.1K · Sold 10.0K
Granted 1.8K
Granted 11.3K
Granted 91.1K · Sold 93.3K
Granted 13.7K · Sold 7.0K
Granted 7.0K · Sold 1.8K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Gibson Daniel Patrick +1 co-filerDirector, 10% owner · 27 transactions | — | 30.70Mas of Nov 2023 | — | 1.46M | 599.9K |
| Gibson Daniel Patrick +1 co-filerDirector, See Footnote · 38 transactions | — | 4.37M | 1.7K | — | 3.07M |
| Sylebra Capital LtdDirector, 10% owner · 1 transaction | -15.2% | 3.40Mas of Nov 2021 | — | — | 1.00M |
| Sylebra Capital LLCDirector · 21 transactions | — | 1.62M | — | — | 430.0K |
| Gibson Daniel PatrickDirector · 5 transactions | — | 1.05M | 10.3K | — | — |
| Diorio Chris PH.D.CHIEF EXECUTIVE OFFICER, Director · 363 transactions | -39.6% | 563.8K | 598.9K | — | 413.8K |
| Baker CaryCHIEF FINANCIAL OFFICER · 196 transactions | +223.6% | 89.3K | 207.8K | — | 134.9K |
| Mecklai HusseinCHIEF OPERATING OFFICER · 168 transactions | — | 75.9Kas of Apr 2025 | 201.3K | — | 147.5K |
| Dossett JeffreyCHIEF REVENUE OFFICER · 211 transactions | +94% | 73.7Kas of Feb 2025 | 200.8K | — | 166.9K |
| Sanghi SteveDirector · 9 transactions | — | 53.5K | 13.3K | 40.2K | — |
| Sessler GregoryDirector · 6 transactions | -6.2% | 28.3Kas of Jun 2023 | 5.3K | — | 7.2K |
| Van Oppen Peter HDirector · 4 transactions | -29.1% | 23.3Kas of Jun 2022 | 2.1K | — | 10.0K |
| Wise TheresaDirector · 2 transactions | +13.9% | 14.8Kas of Jun 2022 | 1.8K | — | — |
| Rao MeeraDirector · 5 transactions | — | 11.3K | 11.3K | — | — |
| Phelan Cathal GCHIEF INNOVATION OFFICER, Director · 66 transactions | -3% | 10.9Kas of May 2025 | 91.1K | — | 93.3K |
| Padval UmeshDirector · 12 transactions | — | 6.7K | 13.7K | — | 7.0K |
| Washington MironDirector · 6 transactions | — | 5.2K | 7.0K | — | 1.8K |
| Gibson Daniel Patrick +2 co-filersDirector, 10% owner · 1 transaction | — | 0as of Sep 2024 | — | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 5 years: -4.58M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.