SEC Form 4
Impinj, Inc. (PI) insider trading
In the 12 months to Oct 26, 2026, 4 PI insiders reported open-market sales of $163.0M across 23 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $163.0M
- 23 filings · 4 insiders
- Open-market purchases
- $0
- 0 filings
- Pre-arranged sales (10b5-1)
- 2 of 23
- $1.9M of $163.0M sold (1%)
Who traded PI, and when
- Sale
- Sale, pre-arranged (10b5-1)
PI daily close from Oct 27, 2025 to Oct 26, 2026, between $91.34 and $241.91, last $174.68. 23 sale and 0 purchase filings by 4 insiders, marked at their filing dates. Daniel Patrick Gibson, Director: sold $110.6M across 12 filings, first filed Nov 5, 2025, last Dec 15, 2025. SYLEBRA CAPITAL LLC, Director: sold $50.3M across 7 filings, first filed May 11, 2026, last Jun 10, 2026. Cary Baker, CHIEF FINANCIAL OFFICER: sold $1.9M across 2 filings, first filed Aug 12, 2026, last Sep 21, 2026. Miron Washington, Director: sold $193.0K across 2 filings, first filed Nov 7, 2025, last Sep 16, 2026.
Largest mark · tap a row for others
Daniel Patrick Gibson · Director
Filing 1 of 2 within a week · $55,795,777 total
Sale $13,562,557
87,138 shares at $155.64 avg
Filed Dec 10, 2025 · traded Dec 8
Close on filing date $155.06
Daniel Patrick Gibson · Director
Director
$110.6M soldSYLEBRA CAPITAL LLC · Director
Director
$50.3M soldCary Baker · CHIEF FINANCIAL OFFICER
CHIEF FINANCIAL OFFICER
$1.9M soldMiron Washington · Director
Director
$193.0K soldOpen-market trades
23 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Daniel Patrick Gibson | Director | $110.6M | — | 12 | — | |
| SYLEBRA CAPITAL LLC | Director | $50.3M | — | 7 | — | |
| Cary Baker | CHIEF FINANCIAL OFFICER | $1.9M | — | 2 | 100% of sales | |
| Miron Washington | Director | $193.0K | — | 2 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Cary Baker CHIEF FINANCIAL OFFICER | SalePre-arranged (10b5-1) | 8,892 | $185.00 | $1.6M | 80,388 | |
traded | Miron Washington Director | Sale | 800 | $173.26 | $138.6K | 4,354 | |
traded | Cary Baker CHIEF FINANCIAL OFFICER | SalePre-arranged (10b5-1) | 1,429 | $185.00 | $264.4K | 88,226 | |
traded | SYLEBRA CAPITAL LLC Director | Sale | 64,633 | $128.47 | $8.3M | 775,943 | |
traded | SYLEBRA CAPITAL LLC Director | Sale | 47,479 | $124.06 | $5.9M | 840,576 | |
traded | SYLEBRA CAPITAL LLC Director | Sale | 33,412 | $136.84 | $4.6M | 888,055 | |
traded | SYLEBRA CAPITAL LLC Director | Sale | 45,037 | $141.87 | $6.4M | 921,467 | |
traded | SYLEBRA CAPITAL LLC Director | Sale | 55,667 | $149.94 | $8.3M | 966,504 | |
traded | SYLEBRA CAPITAL LLC Director | Sale | 73,810 | $153.21 | $11.3M | 1,022,171 | |
traded | SYLEBRA CAPITAL LLC Director | Sale | 36,171 | $152.73 | $5.5M | 1,095,981 | |
traded | Daniel Patrick Gibson Director | Sale | 280,547 | $150.54 | $42.2M | 1,132,152 | |
traded | Daniel Patrick Gibson Director | Sale | 87,138 | $155.64 | $13.6M | 1,412,699 | |
traded | Daniel Patrick Gibson Director | Sale | 45,761 | $167.25 | $7.7M | 1,499,837 | |
traded | Daniel Patrick Gibson Director | Sale | 72,932 | $167.71 | $12.2M | 1,545,598 | |
traded | Daniel Patrick Gibson Director | Sale | 56,853 | $172.12 | $9.8M | 1,618,530 | |
traded | Daniel Patrick Gibson Director | Sale | 78,062 | $164.33 | $12.8M | 1,675,383 | |
traded | Daniel Patrick Gibson Director | Sale | 11,127 | $155.99 | $1.7M | 1,753,445 | |
traded | Daniel Patrick Gibson Director | Sale | 3,772 | $156.30 | $589.6K | 1,764,572 | |
traded | Daniel Patrick Gibson Director | Sale | 30,000 | $155.63 | $4.7M | 1,768,344 | |
traded | Daniel Patrick Gibson Director | Sale | 6,246 | $162.16 | $1.0M | 1,798,344 | |
traded | Daniel Patrick Gibson Director | Sale | 23,157 | $171.95 | $4.0M | 1,804,590 | |
traded | Miron Washington Director | Sale | 342 | $158.94 | $54.4K | 2,040 | |
traded | Daniel Patrick Gibson Director | Sale | 1,513 | $202.01 | $305.6K | 1,827,747 |
GET /stocks/filings/vX/form-4?tickers=PI&filing_date.gte=2025-10-26&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"PI"
],
"issuer_cik": "0001114995",
"owner_cik": "0001705407",
"accession_number": "0001705407-26-000010",
"form_type": "4",
"filing_date": "2026-09-21",
"period_of_report": "2026-09-21",
"issuer_name": "IMPINJ INC",
"issuer_trading_symbol": "PI",
"owner_name": "Baker Cary",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "CHIEF FINANCIAL OFFICER",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-09-21",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 8892,
"transaction_price_per_share": 185,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 80388,
"transaction_value": 1645020,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The sales reported by Mr. Baker were effected pursuant to a Rule 10b5-1 trading plan effective on December 10, 2025."
}
]
},
{
"tickers": [
"PI"
],
"issuer_cik": "0001114995",
"owner_cik": "0001969449",
"accession_number": "0001969449-26-000004",
"form_type": "4",
"filing_date": "2026-09-16",
"period_of_report": "2026-09-15",
"issuer_name": "IMPINJ INC",
"issuer_trading_symbol": "PI",
"owner_name": "WASHINGTON MIRON",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-09-15",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 800,
"transaction_price_per_share": 173.26,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 4354,
"transaction_value": 138608,
"direct_or_indirect": "D"
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 53 records
- Option exercises29 records
- Tax withholding12 records
- Grants and awards2 records
- Gifts8 records
- Other2 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.
- Counted once
- When several owners (a fund and its partners, say) report the same trade, it's counted once. Corrected filings replace the originals.
Frequently asked questions
Has Impinj, Inc.'s CEO sold stock?
No. Chris Ph.d. Diorio (CEO) made no open-market sales filed as CEO in the last 12 months.
How current is PI’s insider data?
These are PI Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.
What counts as an open-market buy or sell?
Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.
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Track PI insider trades with your agent
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for PI every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
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