Impinj, Inc.
Impinj, Inc. (PI) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · PI · as of Sep 30, 2025
Ownership Breakdown
346
Institutional Holders
▲ 35 vs Q2
$5.73B
Total Inst. Value
▲ $2.23B vs Q2
30.46M
Shares Outstanding
freeFloat 96.80%
43.35M
13F Shares Held
▼ 28,249 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
PI largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
DLD ASSET MANAGEMENT, LP electronic components, nec | 11.75M | 40.51% | 40.51% | $19.74B | Nov 13, 2025 | ▼ 250.0K |
FMR LLC electronic components, nec | 4.34M | 14.96% | 14.96% | $784.19B | Nov 13, 2025 | ▲ 16.7K |
BLACKROCK, INC. electronic components, nec | 4.10M | 14.13% | 14.13% | $740.78B | Nov 12, 2025 | ▲ 227.8K |
VANGUARD GROUP INC electronic components, nec | 3.38M | 11.65% | 11.65% | $610.95B | Nov 7, 2025 | ▼ 139.3K |
SYLEBRA CAPITAL LLC electronic components, nec | 1.83M | 6.31% | 6.31% | $330.64B | Nov 14, 2025 | ▼ 300.0K |
CAPITAL INTERNATIONAL INVESTORS electronic components, nec | 1.56M | 5.39% | 5.39% | $282.74B | Nov 13, 2025 | — held |
WHALE ROCK CAPITAL MANAGEMENT LLC electronic components, nec | 1.22M | 4.22% | 4.22% | $221.34B | Nov 14, 2025 | ▲ 338.5K |
INVESCO LTD. electronic components, nec | 1.21M | 4.17% | 4.17% | $218.58B | Nov 13, 2025 | ▲ 393.7K |
STATE STREET CORP electronic components, nec | 1.15M | 3.97% | 3.97% | $208.24B | Nov 14, 2025 | ▼ 63.0K |
CAPITAL WORLD INVESTORS electronic components, nec | 754.3K | 2.60% | 2.60% | $136.35B | Nov 13, 2025 | — held |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
19
Increased
+1.60M shares8
New Positions
first time holders20
Decreased
−1.99M shares0
Sold Out
fully exitedNet shares change (top 50)
389.9K
+1.60M / −1.99M
Net new holders
+7
8 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
PI insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
15
Buy transactions
16
Sell transactions
0.94
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
SYLEBRA CAPITAL LLC director | Jun 4, 2026 | Sale | 33,412 | $136.84 | $4.57M | 888.1K | Form 4 ↗ |
SYLEBRA CAPITAL LLC director | Jun 2, 2026 | Sale | 38,724 | $142.31 | $5.51M | 927.8K | Form 4 ↗ |
SYLEBRA CAPITAL LLC director | Jun 3, 2026 | Sale | 6,313 | $139.17 | $878.6K | 921.5K | Form 4 ↗ |
SYLEBRA CAPITAL LLC director | May 29, 2026 | Sale | 48,504 | $150.78 | $7.31M | 973.7K | Form 4 ↗ |
SYLEBRA CAPITAL LLC director | Jun 1, 2026 | Sale | 7,163 | $144.29 | $1.03M | 966.5K | Form 4 ↗ |
Gibson Daniel Patrick director | May 28, 2026 | Award | 1,896 | — | — | 1.9K | Form 4 ↗ |
Valdez Arthur L Jr director | May 28, 2026 | Award | 1,896 | — | — | 1.9K | Form 4 ↗ |
WASHINGTON MIRON director | May 28, 2026 | Award | 1,896 | — | — | 1.9K | Form 4 ↗ |
PADVAL UMESH director | May 28, 2026 | Award | 1,896 | — | — | 1.9K | Form 4 ↗ |
Sanghi Steve director | May 28, 2026 | Award | 2,085 | — | — | 2.1K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Impinj, Inc. (PI) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 3.20%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Impinj, Inc. is DLD ASSET MANAGEMENT, LP, holding approximately 11.75 million shares — equal to 40.51% of outstanding shares — as of September 30, 2025.
A total of 346 institutional investors currently hold PI stock, with a combined institutional value of approximately $5.73 billion as of the most recent 13F filing period.
Frequently asked questions
PI ownershipImpinj, Inc. (PI) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is DLD ASSET MANAGEMENT, LP with a 40.51% stake. Company insiders hold 3.20%. Data sourced from SEC Form 13F as of September 30, 2025.