Impinj Inc
PI- Exchange
- Nasdaq
- Industry
- Electronic Components, NEC
- SEC CIK
- 0001114995
In the last 90 days, Impinj Inc insiders filed 0 open-market purchases and 3 sales; 317 institutions reported holding it in 13F filings for Q2 2026, worth $4.69B in total; Soros Fund Management is the only superinvestor holding it.
Holders of 5% or more of PI
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Impinj Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Capital International Investors | 13G | 5.40%1.53M shares | New | Feb 14, 20251 filing | Feb 14, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
4 Schedule 13D and 13G filings on Impinj Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Dec 17, 20255:02 PM ET | Sylebra Capital LLCand 3 others | 13D/A | 3.76%1.13M shares | −1.24 ppfrom 5.00%Below 5% | Dec 15, 2025 | SEC |
| Dec 5, 20255:06 PM ET | Sylebra Capital LLCand 3 others | 13D/A | 5.00%1.50M shares | −1.29 ppfrom 6.29% | Dec 3, 2025 | SEC |
| Sep 12, 20254:03 PM ET | Sylebra Capital LLCand 3 others | 13D/A | 6.29%1.83M shares | – | Sep 10, 2025 | SEC |
| Feb 14, 20251:32 PM ET | Capital International Investors | 13G | 5.40%1.53M shares | New | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Impinj Inc shares.
No Form 144 notices for Impinj Inc are on file.