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 $2.7M · 5net −$2.7M
$10k$10k$100k$100k$1M$1M$10M$10MbuyssalesJun 28Jul 13Jul 28Aug 13Aug 28Sep 13Sep 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
Aug 26, 2026 SForm 4 →Aug 28, 4:30 pm EDTKorro Bio, Inc.KRRO300$13.96$4,188141,002−0.21%10b5-1
Aug 19, 2026 SForm 4 →Aug 21, 4:20 pm EDTKorro Bio, Inc.KRRO28,468$14.00$398,552141,053−16.8%10b5-1
Aug 11, 2026 SForm 4 →Aug 13, 5:04 pm EDTKorro Bio, Inc.KRRO2,143$13.96$29,916145,937−1.45%10b5-1
Jul 2, 2026 SForm 4 →Jul 7, 6:04 pm EDTKorro Bio, Inc.KRRO110,023$14.02$1,542,970146,305−42.9%10b5-1

Reported trades — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.