Skip to content
sellWeak cluster of 210b5-1 plan

Chris Diorio Ph.d. sold $1.9M of PI

CHIEF EXECUTIVE OFFICER at IMPINJ INC. 10,000 shares at an average of $188.41, traded Aug 28, 2025, filed Aug 29, 2025.

Warning score
38
Value
$1.9M
10,000 shares
Holdings after
356,109
-3% from before
From 52-week low
+205%
low $62.54, close $190.56
From 52-week high
-20%
high $238.58, as of Aug 28, 2025

Score components

  • Role
    CEO
    +25
  • Trade size
    $1.9M at market
    +25
  • Share of holdings sold
    Sold 2.7% of holdings
    0
  • Cluster
    2 insiders selling within 14 days
    +8
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

This signal so far: 1m -6.4%, 3m -8.3%, 6m -34.6%.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

PIOct 9, 2026 · close 189.63
Since filing Aug 29, 2025: +1.2%SPY +22.3% · excess -21.1%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001415889-25-023326, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 28, 2025SOpen-market sale
Common Stock10b5-1
-1,112$185.93$207k364,997Aug 29, 2025
Aug 28, 2025SOpen-market sale
Common Stock10b5-1
-784$186.80$146k364,213Aug 29, 2025
Aug 28, 2025SOpen-market sale
Common Stock10b5-1
-1,749$188.14$329k362,464Aug 29, 2025
Aug 28, 2025SOpen-market sale
Common Stock10b5-1
-960$189.06$182k361,504Aug 29, 2025
Aug 28, 2025SOpen-market sale
Common Stock10b5-1
-325$190.33$62k361,179Aug 29, 2025
Aug 28, 2025SOpen-market sale
Common Stock10b5-1
-70$190.79$13k361,109Aug 29, 2025
Aug 29, 2025SOpen-market sale
Common Stock10b5-1
-2,000$188.39$377k359,109Aug 29, 2025
Aug 29, 2025SOpen-market sale
Common Stock10b5-1
-2,800$189.39$530k356,309Aug 29, 2025
Aug 29, 2025SOpen-market sale
Common Stock10b5-1
-200$190.28$38k356,109Aug 29, 2025

Related signals

Other insiders at IMPINJ INC and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
35Weak
PIsell 210b5-1
IMPINJ INC
Cary Baker
CHIEF FINANCIAL OFFICER
$1.6M
8,892 shares
-10%
39Weak
PIsell 2
IMPINJ INC
Miron Washington
director
$139k
800 shares
-16%
15Weak
PIsell10b5-1
IMPINJ INC
Cary Baker
CHIEF FINANCIAL OFFICER
$264k
1,429 shares
-2%
40Moderate
PIsell
IMPINJ INC
Sylebra Capital LLC
director
$7.4M
57,633 shares
-7%
40Moderate
PIsell
IMPINJ INC
Sylebra Capital LLC
director
$8.3M
64,633 shares
-8%
40Moderate
PIsell
IMPINJ INC
Sylebra Capital LLC
director
$5.9M
47,479 shares
-5%
40Moderate
PIsell
IMPINJ INC
Sylebra Capital LLC
director
$4.6M
33,412 shares
-4%
40Moderate
PIsell
IMPINJ INC
Sylebra Capital LLC
director
$6.4M
45,037 shares
-5%
40Moderate
PIsell
IMPINJ INC
Sylebra Capital LLC
director
$8.3M
55,667 shares
-5%
40Moderate
PIsell
IMPINJ INC
Sylebra Capital LLC
director
$11M
73,810 shares
-7%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Chris Diorio Ph.d. sold $1.9M of PI | InsiderTell