Form4insider filings, from the source

Insider · CIK 0001030575

Jean Francois Formela

Files at: KRRO, NTLA, TBIO, SPRO. On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $686k · 1net −$686k
$10k$10k$100k$100k$1M$1MbuyssalesAug 28Sep 2Sep 7Sep 12Sep 18Sep 23Sep 28

Reported trades — common stock

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Sep 11, 2026 SForm 4 →Sep 15, 4:15 pm EDTKorro Bio, Inc.KRRO48,690$14.09$686,177132,650−26.9%10b5-1

Reported trades — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.