Adamchak Mark 4

What Happened Mark Adamchak, Principal Accounting Officer at Bionano Genomics, had 3 shares of BNGO common stock withheld by the company to satisfy tax withholding obligations related to vested restricted stock units (RSUs). The filing shows the withholding/ disposition of 3 shares at $1.10 per share for a total value of $3 on February 17, 2026.

Key Details

• Transaction date: 2026-02-17; Filing date: 2026-02-18 (filed the next day).
• Nature of transaction: Tax withholding (code F) — shares withheld to cover tax liability upon RSU settlement, not an open-market sale.
• Quantity and price: 3 shares @ $1.10 each; total value $3.
• Origin of shares: RSUs that vested on February 15, 2026; award was granted February 15, 2023 (per footnote).
• Shares owned after the transaction: Not specified in the filing.

Context This was a routine tax-withholding event tied to RSU settlement, where the issuer retained shares instead of issuing them to satisfy withholding obligations. Such transactions are administrative and generally neutral with respect to insider sentiment, unlike open-market purchases or sales.