Comparable stake leader
VANGUARD PORTFOLIO MANAGEMENT LLC
SEC ownership of IMPINJ INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001114995.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- PI on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
VANGUARD PORTFOLIO MANAGEMENT LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
VANGUARD PORTFOLIO MANAGEMENT LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001114995
- Issuer location
- Seattle, WA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of IMPINJ INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
VANGUARD PORTFOLIO MANAGE...
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 7.2%
13D/G row: VANGUARD PORTFOLIO MANAGEMENT LLC
Showing 1-8 of 50 holder rows.
Quick read
VANGUARD PORTFOLIO MANAGEMENT LLC leads the comparable SEC ownership view at 7.2%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens VANGUARD PORTFOLIO MANAGEMENT LLC's linked filing trail.
Comparable ownership
Top 5
VANGUARD PORTFOLIO MANAGEMENT LLC
7.2%
Capital International Investors
4.5%
SYLEBRA CAPITAL LLC
3.8%
BlackRock, Inc.
14%
FMR LLC
14%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
7.2%
|
$222,302,058
2,164,577 shares
|
$0 | 31 Mar 2026 |
| Capital International Investors |
13F
13D/G
Company
|
4.5%
from 13D/G
|
$138,889,426
1,352,380 shares
|
— | 31 Mar 2026 |
| SYLEBRA CAPITAL LLC |
13D/G
3/4/5
13F
Director · Company
|
3.8%
|
$195,647,187
1,132,152 shares
|
-$64,324,202 | 15 Dec 2025 |
| BlackRock, Inc. |
13F
Company
|
14%
|
$442,996,860
4,313,504 shares
|
— | 31 Mar 2026 |
| FMR LLC |
13F
Company
|
14%
|
$439,612,783
4,280,553 shares
|
— | 31 Mar 2026 |
| STATE STREET CORP |
13F
Company
|
4.9%
|
$152,495,944
1,484,868 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
4.2%
|
$129,988,417
1,265,710 shares
|
— | 31 Mar 2026 |
| Capital World Investors |
13F
Company
|
3.4%
|
$104,348,540
1,016,052 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$223,800,972.
Buys
$7,353,144
Insiders: 1
Sells
$231,154,117
Insiders: 3
Net
-$223,800,972
Shares: -1,370,737
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 47,914
Shares: 1,418,651
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 47,914 | 382,105 | $7,353,144 | $54,289,858 | -$46,936,714 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 697,450 | $0 | $110,643,428 | -$110,643,428 |
| 9-12 | 0 | 339,096 | $0 | $66,220,830 | -$66,220,830 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-16 of 16 reporting-owner rows connected to IMPINJ INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
16
Largest Forms 3/4/5 holder
Sylebra Capital Ltd
Net 12M change
-$223,800,973
Latest report
23 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Sylebra Capital Ltd | 10%+ Owner | $342,252,082 | Mixed | 20 Nov 2023 | ||
| Daniel Patrick Gibson | Director | $107,481,074 | Mixed | 28 May 2026 | ||
| SYLEBRA CAPITAL LLC | Director | $98,822,315 | -$216,397,786 | -69% | Filing P/S | 08 Jun 2026 |
| Chris Ph.d. Diorio | CHIEF EXECUTIVE OFFICER, Director | $59,720,768 | -$7,348,830 | -11% | Median | 23 Jun 2026 |
| Cary Baker | Chief Financial Officer | $9,207,568 | Median | 23 Jun 2026 | ||
| Jeffrey Dossett | Chief Revenue Officer | $7,345,346 | Mixed | 20 Feb 2025 | ||
| Steve Sanghi | Director | $5,822,451 | Mixed | 28 May 2026 | ||
| Hussein Mecklai | Chief Operating Officer | $5,066,641 | Mixed | 12 Apr 2025 | ||
| Gregory Sessler | Director | $2,304,076 | Mixed | 08 Jun 2023 | ||
| Peter H. van Oppen | Director | $1,978,650 | Mixed | 09 Jun 2022 | ||
| Cathal G. Phelan | CHIEF INNOVATION OFFICER, Director | $1,859,543 | Mixed | 20 May 2025 | ||
| Meera Rao | Director | $1,463,395 | Mixed | 28 May 2026 | ||
| Theresa Wise | Director | $1,210,869 | Mixed | 09 Jun 2022 | ||
| Umesh Padval | Director | $983,991 | Mixed | 28 May 2026 | ||
| Miron Washington | Director | $829,941 | -$54,357 | -6.1% | Mixed | 28 May 2026 |
| Arthur L. Valdez Jr. | Director | Mixed | 28 May 2026 |
Recent insider transactions for IMPINJ INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Cary Baker | PI | Common Stock | Tax liability | -0.47% | -424 | 89,655 | 23 Jun 2026 | Direct | ||
| Cary Baker | PI | Common Stock | Options Exercise | 1.21% | 1,076 | 90,079 | 23 Jun 2026 | Direct | ||
| Cary Baker | PI | Restricted Stock Units | Options Exercise | -42.8% | -1,076 | 1,438 | 23 Jun 2026 | Direct | ||
| Chris Ph.d. Diorio | PI | Common Stock | Tax liability | -0.31% | -1,197 | 382,145 | 23 Jun 2026 | Direct | ||
| Chris Ph.d. Diorio | PI | Common Stock | Options Exercise | 0.8% | 3,040 | 383,342 | 23 Jun 2026 | Direct | ||
| Chris Ph.d. Diorio | PI | Restricted Stock Units | Options Exercise | -45.3% | -3,040 | 3,672 | 23 Jun 2026 | Direct | ||
| Chris Ph.d. Diorio | PI | Common Stock | Gift | -2.56% | -10,000 | 380,302 | 15 Jun 2026 | Direct | ||
| Sylebra Capital Llc | PI | Common Stock | Sale | -2.4% | $2,433,169 | $127.36 | -19,105 | 775,943 | 09 Jun 2026 | See Footnote (1) (2) |
| Sylebra Capital Llc | PI | Common Stock | Sale | -5.42% | $5,870,351 | $128.94 | -45,528 | 795,048 | 08 Jun 2026 | See Footnote (1) (2) |
| Sylebra Capital Llc | PI | Common Stock | Sale | -5.35% | $5,890,074 | $124.06 | -47,479 | 840,576 | 05 Jun 2026 | See Footnote (1) (2) |
| Sylebra Capital Llc | PI | Common Stock | Sale | -3.63% | $4,572,215 | $136.84 | -33,412 | 888,055 | 04 Jun 2026 | See Footnote (1) (2) |
| Sylebra Capital Llc | PI | Common Stock | Sale | -0.68% | $878,557 | $139.17 | -6,313 | 921,467 | 03 Jun 2026 | See Footnote (1) (2) |
| Sylebra Capital Llc | PI | Common Stock | Sale | -4.01% | $5,510,987 | $142.31 | -38,724 | 927,780 | 02 Jun 2026 | See Footnote (1) (2) |
| Sylebra Capital Llc | PI | Common Stock | Sale | -0.74% | $1,033,557 | $144.29 | -7,163 | 966,504 | 01 Jun 2026 | See Footnote (1) (2) |
| Sylebra Capital Llc | PI | Common Stock | Sale | -4.75% | $7,313,215 | $150.78 | -48,504 | 973,667 | 29 May 2026 | See Footnote (1) (2) |
| Daniel Patrick Gibson | PI | Common Stock | Options Exercise | 15.6% | 3,114 | 23,010 | 28 May 2026 | Direct | ||
| Daniel Patrick Gibson | PI | Restricted Stock Units | Award | 1,896 | 1,896 | 28 May 2026 | Direct | |||
| Daniel Patrick Gibson | PI | Restricted Stock Units | Options Exercise | -100% | -3,114 | 0 | 28 May 2026 | Direct | ||
| Arthur L. Valdez Jr. | PI | Restricted Stock Units | Award | 1,896 | 1,896 | 28 May 2026 | Direct | |||
| Miron Washington | PI | Common Stock | Options Exercise | 152.6% | 3,114 | 5,154 | 28 May 2026 | Direct | ||
| Miron Washington | PI | Restricted Stock Units | Award | 1,896 | 1,896 | 28 May 2026 | Direct | |||
| Miron Washington | PI | Restricted Stock Units | Options Exercise | -100% | -3,114 | 0 | 28 May 2026 | Direct | ||
| Umesh Padval | PI | Common Stock | Options Exercise | 88% | 3,114 | 6,654 | 28 May 2026 | Direct | ||
| Umesh Padval | PI | Restricted Stock Units | Award | 1,896 | 1,896 | 28 May 2026 | Direct | |||
| Umesh Padval | PI | Restricted Stock Units | Options Exercise | -100% | -3,114 | 0 | 28 May 2026 | Direct | ||
| Steve Sanghi | PI | Common Stock | Options Exercise | 34.8% | 3,425 | 13,274 | 28 May 2026 | Direct | ||
| Steve Sanghi | PI | Restricted Stock Units | Award | 2,085 | 2,085 | 28 May 2026 | Direct | |||
| Steve Sanghi | PI | Restricted Stock Units | Options Exercise | -100% | -3,425 | 0 | 28 May 2026 | Direct | ||
| Meera Rao | PI | Common Stock | Options Exercise | 37.9% | 3,114 | 11,322 | 28 May 2026 | Direct | ||
| Meera Rao | PI | Restricted Stock Units | Award | 1,896 | 1,896 | 28 May 2026 | Direct | |||
| Meera Rao | PI | Restricted Stock Units | Options Exercise | -100% | -3,114 | 0 | 28 May 2026 | Direct | ||
| Chris Ph.d. Diorio | PI | Common Stock | Other | -31.6% | -180,000 | 390,302 | 26 May 2026 | Direct | ||
| Chris Ph.d. Diorio | PI | Common Stock | Other | 46.1% | 180,000 | 570,302 | 26 May 2026 | Direct | ||
| Sylebra Capital Llc | PI | Common Stock | Sale | -3.48% | $5,689,071 | $154.46 | -36,832 | 1,022,171 | 11 May 2026 | See Footnote (1) (2) |
| Sylebra Capital Llc | PI | Common Stock | Sale | 3.69% | $5,689,071 | $154.46 | 36,832 | 1,034,877 | 11 May 2026 | See Footnote (1) (2) |
| Sylebra Capital Llc | PI | Common Stock | Sale | -3.37% | $5,619,170 | $151.96 | -36,978 | 1,059,003 | 08 May 2026 | See Footnote (1) (2) |
| Sylebra Capital Llc | PI | Common Stock | Sale | 1.05% | $1,664,074 | $150.16 | 11,082 | 1,068,525 | 08 May 2026 | See Footnote (1) (2) |
| Sylebra Capital Llc | PI | Common Stock | Sale | -2.36% | $3,955,096 | $152.73 | -25,896 | 1,070,085 | 08 May 2026 | See Footnote (1) (2) |
| Sylebra Capital Llc | PI | Common Stock | Sale | -3.19% | $5,524,397 | $152.73 | -36,171 | 1,095,981 | 07 May 2026 | See Footnote (1) (2) |
| Cary Baker | PI | Common Stock | Tax liability | -0.82% | -732 | 89,003 | 23 Mar 2026 | Direct | ||
| Cary Baker | PI | Common Stock | Options Exercise | 2.11% | 1,858 | 89,735 | 23 Mar 2026 | Direct | ||
| Cary Baker | PI | Restricted Stock Units | Award | 7,627 | 7,627 | 23 Mar 2026 | Direct | |||
| Cary Baker | PI | Restricted Stock Units | Options Exercise | -100% | -1,858 | 0 | 23 Mar 2026 | Direct | ||
| Chris Ph.d. Diorio | PI | Common Stock | Tax liability | -0.57% | -2,218 | 390,302 | 23 Mar 2026 | Direct | ||
| Chris Ph.d. Diorio | PI | Common Stock | Options Exercise | 1.46% | 5,635 | 392,520 | 23 Mar 2026 | Direct | ||
| Chris Ph.d. Diorio | PI | Restricted Stock Units | Award | 24,806 | 24,806 | 23 Mar 2026 | Direct | |||
| Chris Ph.d. Diorio | PI | Restricted Stock Units | Options Exercise | -100% | -5,635 | 0 | 23 Mar 2026 | Direct | ||
| Cary Baker | PI | Common Stock | Tax liability | -2.48% | -2,234 | 87,877 | 20 Feb 2026 | Direct | ||
| Cary Baker | PI | Common Stock | Award | 10.4% | 8,508 | 90,111 | 20 Feb 2026 | Direct | ||
| Chris Ph.d. Diorio | PI | Common Stock | Tax liability | -1.89% | -7,435 | 386,885 | 20 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.