Chris Diorio Ph.D. is CEO at IMPINJ INC (PI). They have made 79 open-market trades across 1 company since 2016, most recently 2026-10-12.
CIK 0001677721
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 79 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| PI | 346,265 | $60.5M |
Shares reported on the most recent Form 4, priced at the 2026-10-13 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| PI | SELL · 10b5-1 | 2025-09-15 | 2025-09-16 | $184.49 | $3.4M | -9.5% | +3.9% | -20.9% |
| PI | SELL · 10b5-1 | 2025-09-08 | 2025-09-09 | $193.43 | $3.5M | -3.1% | +4.0% | -19.8% |
| PI | SELL · 10b5-1 | 2025-09-02 | 2025-09-03 | $184.92 | $3.5M | -1.5% | -4.4% | -13.2% |
| PI | SELL · 10b5-1 | 2025-08-28 | 2025-08-29 | $188.19 | $2.8M | +1.1% | -0.7% | -5.3% |
| PI | SELL | 2025-02-21 | 2025-02-24 | $98.77 | $1.6M | -2.2% | -3.4% | +23.4% |
| PI | SELL | 2025-01-13 | 2025-01-14 | $141.02 | $237K | -12.4% | -30.5% | -54.3% |
| PI | SELL | 2024-12-24 | 2024-12-26 | $146.22 | $440K | +2.8% | -10.8% | -37.7% |
| PI | SELL | 2024-11-06 | 2024-11-08 | $201.52 | $10.1M | -9.8% | -22.8% | -47.7% |
| PI | SELL | 2024-10-29 | 2024-10-31 | $201.43 | $14.1M | +2.9% | -0.9% | -30.5% |
| PI | SELL | 2024-10-14 | 2024-10-15 | $237.81 | $577K | -15.6% | -23.1% | -38.5% |
| PI | SELL | 2024-09-24 | 2024-09-25 | $209.12 | $627K | -0.8% | -8.7% | -32.3% |
| PI | SELL | 2024-07-15 | 2024-07-16 | $175.37 | $400K | -9.6% | -8.2% | +34.7% |
| PI | SELL · 10b5-1 | 2024-07-08 | 2024-07-09 | $162.32 | $1.6M | +4.4% | -9.5% | +32.9% |
| PI | SELL · 10b5-1 | 2024-07-01 | 2024-07-02 | $154.78 | $3.0M | +10.8% | -9.1% | +36.2% |
| PI | SELL · 10b5-1 | 2024-06-24 | 2024-06-25 | $148.58 | $2.7M | +9.3% | +6.0% | +38.5% |
| PI | SELL · 10b5-1 | 2024-06-17 | 2024-06-18 | $149.74 | $3.1M | +5.8% | +19.2% | +27.2% |
| PI | SELL · 10b5-1 | 2024-06-10 | 2024-06-11 | $147.12 | $2.9M | -2.6% | +9.9% | +13.1% |
| PI | SELL · 10b5-1 | 2024-05-31 | 2024-06-04 | $164.03 | $3.8M | -9.0% | -1.9% | -1.2% |
| PI | SELL | 2024-04-26 | 2024-04-30 | $146.99 | $7.8M | +2.7% | +4.7% | +4.8% |
| PI | SELL | 2024-04-15 | 2024-04-16 | $118.59 | $248K | +23.8% | +39.2% | +44.5% |
| PI | SELL | 2024-03-25 | 2024-03-26 | $127.19 | $751K | -2.3% | +22.0% | +16.4% |
| PI | SELL | 2024-03-18 | 2024-03-19 | $123.52 | $144K | +6.5% | +1.2% | +25.3% |
| PI | SELL · 10b5-1 | 2024-02-27 | 2024-02-28 | $105.00 | $525K | +10.2% | +21.4% | +49.7% |
| PI | SELL · 10b5-1 | 2024-02-23 | 2024-02-26 | $101.67 | $3.7M | +9.6% | +21.4% | +51.0% |
| PI | SELL · 10b5-1 | 2024-02-15 | 2024-02-20 | $105.16 | $1.1M | +13.3% | +26.8% | +70.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.