Latest filingAug 21, 2026Most recent Form 4
PI
IMPINJ INC
NasdaqTechnologyElectronic Components, NEC
Insider activity for last month from 08/04 to 09/04. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$00 sells
Net open-market+$02 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period7transactions
- M · Option exercise · dominant4 · 57%
- F · Tax withholding2 · 29%
- G · Gifts1 · 14%
Activity by reported role
A joint filing can contribute to multiple roles7transactions
- Chief executive officer · dominant4 · 57%
- Chief financial officer3 · 43%
Distinct insiders active
Reporting-owner CIKs by month · peak Aug 2026 (2)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeDiorio Chris Ph.D.Common Stock · Direct
364,421Aug 20, 2026
Baker CaryCommon Stock · Direct
89,965Aug 20, 2026
Diorio Chris Ph.D.Restricted Stock Units · Direct
11,262Aug 20, 2026
Baker CaryRestricted Stock Units · Direct
5,219Aug 20, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 04 → Sep 04
LessMore
Top insiders
By absolute net value across the selected period- DP-$235.9k
- BC-$109.4k
Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
PI transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| PI | Baker Cary | CFO | exercise | 1.73k | $0 | M | +2.7% | 08/21 | 08/20 | |
| PI | Baker Cary | CFO | withholding | 685 | -$10.9M | F | +2.7% | 08/21 | 08/20 | |
| PI | Baker Cary | CFO | exercise | 1.73k | $0 | M | +2.7% | 08/21 | 08/20 | |
| PI | DIORIO CHRIS PH.D. | CEO | exercise | 3.75k | $0 | M | +2.7% | 08/21 | 08/20 | |
| PI | DIORIO CHRIS PH.D. | CEO | withholding | 1.47k | -$23.5M | F | +2.7% | 08/21 | 08/20 | |
| PI | DIORIO CHRIS PH.D. | CEO | exercise | 3.75k | $0 | M | +2.7% | 08/21 | 08/20 | |
| PI | DIORIO CHRIS PH.D. | CEO | gift10b5-1 | 10.0k | $0 | G | +0.1% | 08/18 | 08/17 |
IMPINJ INC Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at IMPINJ INC?
Baker Cary, DIORIO CHRIS PH.D..
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
No code-S sale is available for this period.
What is the recent purchase and sale balance?
No code-P purchases or code-S sales were reported in the selected period.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.