Impinj, Inc. (PI) Ownership
PI ownership summary
as of October 18, 2026- Institutions
- 109.2% of shares outstanding
- Insiders
- 2.68% of shares outstanding
- Shares outstanding
- 30.6M
- Float
- 29.6M shares available to trade
- Short interest
- 12.98% 2.7M shares short
- Days to cover
- 6.78 short interest down 10.9% vs prior month
- Institutions 109.18%
- Insiders 2.68%
PI top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | FMR Inc | 14.93% | 4.6M | $800.2M | +282,246 (+6.6%) | June 30, 2026 |
| 2 | BlackRock Inc | 14.56% | 4.4M | $780.3M | +135,885 (+3.2%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 7.18% | 2.2M | $384.8M | +54,078 (+2.5%) | June 30, 2026 |
| 4 | State Street Corp | 5.57% | 1.7M | $298.2M | +215,717 (+14.5%) | June 30, 2026 |
| 5 | Capital Research & Mgmt Co - Division 3 | 4.72% | 1.4M | $253.1M | +91,072 (+6.7%) | June 30, 2026 |
| 6 | Vanguard Capital Management, LLC | 4.20% | 1.3M | $224.9M | +16,957 (+1.3%) | June 30, 2026 |
| 7 | Capital World Investors | 3.68% | 1.1M | $197.1M | +108,014 (+10.6%) | June 30, 2026 |
| 8 | Millennium Management LLC | 2.73% | 834K | $146.3M | +732,108 (+715.9%) | June 30, 2026 |
| 9 | American Century Companies Inc | 2.63% | 804K | $141.1M | −13,657 (−1.7%) | June 30, 2026 |
| 10 | Sylebra Capital LLC | 2.54% | 776K | $136.1M | −356,209 (−31.5%) | June 30, 2026 |
| 11 | Chevy Chase Trust Holdings, Inc. | 2.41% | 737K | $129.3M | +8,743 (+1.2%) | June 30, 2026 |
| 12 | Geode Capital Management, LLC | 2.40% | 734K | $128.7M | +51,626 (+7.6%) | June 30, 2026 |
| 13 | Manufacturers Life Insurance Co | 2.19% | 669K | $117.4M | +243,379 (+57.1%) | June 30, 2026 |
| 14 | Ameriprise Financial Inc | 1.74% | 531K | $93.1M | −327,355 (−38.1%) | June 30, 2026 |
| 15 | UBS Group AG | 1.36% | 414K | $72.7M | −103,656 (−20.0%) | June 30, 2026 |
| 16 | Point72 Asset Management, L.P. | 1.34% | 408K | $71.6M | +119,202 (+41.2%) | June 30, 2026 |
| 17 | Whale Rock Capital Management LLC | 1.33% | 405K | $71.1M | — | June 30, 2026 |
| 18 | The Goldman Sachs Group Inc | 1.27% | 389K | $68.2M | +114,063 (+41.5%) | June 30, 2026 |
| 19 | Morgan Stanley - Brokerage Accounts | 1.18% | 361K | $63.2M | +89,057 (+32.8%) | June 30, 2026 |
| 20 | T. Rowe Price Associates, Inc. | 1.17% | 357K | $62.6M | +51,330 (+16.8%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 15 holders added 2.3M shares and 4 cut 801K.
PI top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | American Funds SMALLCAP World A | 7.97% | 2.4M | $427.3M | +24,800 (+1.0%) | September 30, 2026 |
| 2 | iShares Core S&P Small-Cap ETF | 5.66% | 1.7M | $303.2M | +375 (+0.0%) | September 30, 2026 |
| 3 | Fidelity Select Semiconductors | 3.67% | 1.1M | $196.8M | — | August 31, 2026 |
| 4 | Fidelity Growth Company Fund | 3.33% | 1.0M | $178.6M | — | August 31, 2026 |
| 5 | Vanguard MStar Total Stk Mkt Idx Invest | 3.01% | 921K | $161.4M | −1,129 (−0.1%) | August 31, 2026 |
| 6 | iShares Russell 2000 ETF | 2.48% | 758K | $132.9M | −8,704 (−1.1%) | September 30, 2026 |
| 7 | Vanguard Small Cap Index | 2.03% | 619K | $108.6M | −47,046 (−7.1%) | September 30, 2026 |
| 8 | Vanguard Information Technology ETF | 2.02% | 616K | $108.0M | +1,416 (+0.2%) | September 30, 2026 |
| 9 | State Street® SPDR® S&P® Smcndctr ETF | 1.43% | 438K | $76.8M | +1,858 (+0.4%) | September 30, 2026 |
| 10 | Vanguard MStar Small Cap Growth Indx Inv | 1.13% | 345K | $60.5M | −37,697 (−9.9%) | September 30, 2026 |
| 11 | American Century Small Cap Growth Inv | 1.12% | 342K | $60.0M | +49,630 (+17.0%) | September 30, 2026 |
| 12 | Fidelity Small Cap Index | 1.05% | 320K | $56.1M | +2,603 (+0.8%) | July 31, 2026 |
| 13 | Fidelity Growth Company K6 | 0.94% | 286K | $50.1M | — | August 31, 2026 |
| 14 | iShares Russell 2000 Growth ETF | 0.90% | 274K | $48.0M | −346 (−0.1%) | September 30, 2026 |
| 15 | iShares S&P Small-Cap 600 Growth ETF | 0.88% | 269K | $47.1M | — | September 30, 2026 |
| 16 | State Street SPDR Port S&P 600 Sm CpETF | 0.86% | 264K | $46.3M | — | September 30, 2026 |
| 17 | Fidelity Series Growth Company | 0.83% | 254K | $44.6M | — | August 31, 2026 |
| 18 | CT (Lux) American Smaller Com 9U USD | 0.75% | 228K | $40.0M | −48,240 (−17.4%) | September 30, 2026 |
| 19 | Vanguard Russell 2000 ETF | 0.56% | 170K | $29.8M | +1,920 (+1.1%) | September 30, 2026 |
| 20 | Fidelity Small Cap Growth | 0.55% | 169K | $29.6M | +423 (+0.3%) | July 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
PI insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-12-15 | Sylebra Capital Llc | Sell | $150.36 | 134,629 | $20.2M |
| 2025-12-12 | Sylebra Capital Llc | Sell | $146.62 | 50,573 | $7.4M |
| 2025-12-11 | Sylebra Capital Llc | Sell | $152.87 | 95,345 | $14.6M |
| 2025-12-10 | Sylebra Capital Llc | Sell | $155.49 | 84,604 | $13.2M |
| 2025-12-09 | Sylebra Capital Llc | Sell | $160.01 | 40 | $6,400 |
| 2025-12-08 | Sylebra Capital Llc | Sell | $160.72 | 2,494 | $400,836 |
| 2025-12-05 | Sylebra Capital Llc | Sell | $161.04 | 1,373 | $221,108 |
| 2025-12-04 | Sylebra Capital Llc | Sell | $160.59 | 3,167 | $508,589 |
| 2025-12-03 | Sylebra Capital Llc | Sell | $167.97 | 41,221 | $6.9M |
| 2025-12-02 | Sylebra Capital Llc | Sell | $168.23 | 41,874 | $7.0M |
| 2025-12-01 | Sylebra Capital Llc | Sell | $167.02 | 31,058 | $5.2M |
| 2025-11-28 | Sylebra Capital Llc | Sell | $172.62 | 22,297 | $3.8M |
| 2025-11-26 | Sylebra Capital Llc | Sell | $171.80 | 34,556 | $5.9M |
| 2025-11-25 | Sylebra Capital Llc | Sell | $167.73 | 46,110 | $7.7M |
| 2025-11-24 | Sylebra Capital Llc | Sell | $159.42 | 31,952 | $5.1M |
| 2025-11-21 | Sylebra Capital Llc | Sell | $155.10 | 3,046 | $472,435 |
| 2025-11-20 | Sylebra Capital Llc | Sell | $156.32 | 8,081 | $1.3M |
| 2025-11-12 | Sylebra Capital Llc | Sell | $156.30 | 3,772 | $589,564 |
| 2025-11-11 | Sylebra Capital Llc | Sell | $155.63 | 30,000 | $4.7M |
| 2025-11-07 | Miron Washington | Sell | $158.94 | 342 | $54,357 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
PI shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns PI
Institutional investors own 109.2% of Impinj's shares and insiders 2.68%. The largest holder is FMR Inc with 14.93% of the shares (4.6M), as of June 30, 2026. Among the top 20 institutions, 15 added shares and 4 reduced their stake in the latest filings. Short interest is 12.98% of the float, or 6.78 days of average trading volume. The share count rose 135.7% since 2014.
Related: PI analyst forecast, PI key metrics. See the PI stock overview for the latest quote and news.
PI ownership FAQ
Who owns the most Impinj stock?
The largest shareholders of Impinj are FMR Inc (14.93%), BlackRock Inc (14.56%), Vanguard Portfolio Management, LLC (7.18%), State Street Corp (5.57%), Capital Research & Mgmt Co - Division 3 (4.72%).
What percentage of Impinj is owned by institutions?
Institutions hold 109.2% of Impinj's shares outstanding; insiders hold 2.68%.
Which funds own Impinj?
The largest fund holders of Impinj are American Funds SMALLCAP World A (7.97%), iShares Core S&P Small-Cap ETF (5.66%), Fidelity Select Semiconductors (3.67%), Fidelity Growth Company Fund (3.33%), Vanguard MStar Total Stk Mkt Idx Invest (3.01%).
What is Impinj's short interest?
2.7M shares of Impinj were sold short, 12.98% of the float; at the average daily volume it would take 6.78 days to cover.
Are insiders buying or selling Impinj?
Of the latest 20 reported insider transactions in Impinj (since November 7, 2025), 0 were purchases and 20 were sales.
How many shares of Impinj are outstanding?
Impinj has 30.6M shares outstanding, of which 29.6M are in the public float.