Impinj
PI · NASDAQ
$177.84+$2.10 (+1.19%)TodayMarket closed ·
Prev close $175.74
Who owns PI
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 61.2% of PI’s shares.
- Fidelity Management & Research Company LLC14.9%
- BlackRock Institutional Trust Company, N.A.13.0%
- Vanguard Portfolio Management, LLC7.2%
- State Street Investment Management (US)5.6%
- Next 6 largest institutions20.5%
- All other shareholders38.8%
| Holder | Shares | % of shares |
|---|---|---|
| Fidelity Management & Research Company LLC | 4.56M | 14.93% |
| BlackRock Institutional Trust Company, N.A. | 3.98M | 13.01% |
| Vanguard Portfolio Management, LLC | 2.19M | 7.18% |
| State Street Investment Management (US) | 1.70M | 5.57% |
| Capital International Investors | 1.44M | 4.72% |
| Vanguard Capital Management, LLC | 1.28M | 4.20% |
| Capital World Investors | 1.12M | 3.68% |
| Millennium Management LLC | 834.38K | 2.73% |
| American Century Investment Management, Inc. | 804.34K | 2.63% |
| Sylebra Capital LLC | 775.94K | 2.54% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| American Funds SMALLCAP World Fund | 2.41M | 7.89% |
| iShares Core S&P Small-Cap ETF | 1.65M | 5.41% |
| Fidelity Select Semiconductors Portfolio | 1.12M | 3.67% |
| Fidelity Growth Company Fund | 1.02M | 3.33% |
| Vanguard Total Stock Market Index Fund | 921.71K | 3.02% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $76.63M (28 trades) of PI on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| DIORIO CHRIS PH.D. | Gift | 10.00K | — |
| Baker Cary | Option exercise | 596 | — |
| Baker Cary | Option exercise | 479 | — |
| Baker Cary | Tax withholding | 424 | $75.13K |
| Baker Cary | Option exercise | 596 | — |
| Baker Cary | Option exercise | 479 | — |
| DIORIO CHRIS PH.D. | Option exercise | 1.82K | — |
| DIORIO CHRIS PH.D. | Option exercise | 1.22K | — |
| DIORIO CHRIS PH.D. | Tax withholding | 1.20K | $212.11K |
| DIORIO CHRIS PH.D. | Option exercise | 1.82K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 2.70M
- Days to cover
- 6.59
- % of shares outstanding
- 8.84%
- Average daily volume
- 410.04K
- Change since last report
- −10.9%
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