Goldan Keith A. 4

What Happened

• Keith A. Goldan, Chief Financial Officer of Syndax Pharmaceuticals (SNDX), disposed of 1,177 shares on 2026-06-01 at $18.99 per share, for proceeds of approximately $22,351. The sale was executed to cover tax withholding obligations related to the vesting of restricted stock units (RSUs), per the filing footnote.

Key Details

• Transaction date and price: 2026-06-01, 1,177 shares at $18.99 each.
• Proceeds: ≈ $22,351.
• Shares owned after transaction: not disclosed in the provided report data.
• Footnote: F1 — sale represents shares sold to cover tax withholding from RSU vesting.
• Filing timeliness: Form 4 filed 2026-06-02 for the 2026-06-01 transaction (filed next day; generally considered timely under Form 4 rules).

Context

• This was a withholding sale to satisfy tax obligations on vested RSUs, a routine corporate action that does not necessarily indicate the insider's view on the company's outlook. Purchases by insiders can be more indicative of bullish sentiment; withholding sales are common and typically administrative in nature.