Diyong Xu is Director & 10% Owner at Q32 Bio Inc. (QTTB). They have made 1 open-market trade across 1 company since 2026, most recently 2026-05-28.
CIK 0001995088
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.
1 open-market purchase totalling $15.0M since 2026, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| QTTB | 625,000 | $4.7M |
Shares reported on the most recent Form 4, priced at the 2026-06-01 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| QTTB | BUY | 2026-05-28 | 2026-06-01 | $8.00 | $15.0M | +3.7% | +2.3% | +22.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.