Form4insider filings, from the source

Insider · CIK 0001733077

Robert W. Ross

Files at: OBX, XLO, SURF. On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted

Reported trades — common stock

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Jan 4, 2019 MForm 4 →Jan 8, 4:05 pm ESTSurface Oncology, Inc.SURF25,000$4.14$103,40025,000— plan?

Reported trades — derivatives (options, RSUs, warrants)

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Aug 3, 2026 AForm 4 →Aug 5, 4:10 pm EDTObsidian Therapeutics, Inc.OBX37,653——37,653—
Jun 11, 2026 AForm 4 →Jun 12, 4:07 pm EDTXilio Therapeutics, Inc.XLO5,000——5,000—
Mar 1, 2019 AForm 4 →Mar 4, 6:05 pm ESTSurface Oncology, Inc.SURF90,000——90,000—
Jan 4, 2019 MForm 4 →Jan 8, 4:05 pm ESTSurface Oncology, Inc.SURF25,000——256,578—