ROSENBLATT DAVID S 4

What Happened

David S. Rosenblatt, CEO of 1stdibs.com, converted/vested a total of 132,500 restricted stock units (RSUs) on March 9, 2026. Of those vested shares, 62,088 were retained by the company to cover tax withholding at an implied price of $5.49 per share, totaling $340,863. The net result was approximately 70,412 shares issued to Rosenblatt. No shares were sold in an open market transaction.

Key Details

• Transaction date: March 9, 2026; Form 4 filed March 11, 2026 (filed within the normal 2-business-day window).
• RSUs converted/vested: 37,500 + 47,500 + 47,500 = 132,500 shares (reported as derivative conversions, code M).
• Tax withholding: 62,088 shares withheld (code F) at $5.49/share = $340,863; shares were retained by the issuer on a net-settlement basis (not sold in the market).
• Net shares received by Rosenblatt: ~70,412 shares (132,500 vested minus 62,088 withheld).
• Shares owned after transaction: not disclosed in the provided filing excerpt.
• Relevant footnotes: RSUs represent contingent rights to one share each and vest in 16 equal quarterly installments per grants dated Mar 15, 2023; Mar 8, 2024; and Mar 14, 2025. Withholding was to meet tax obligations; no open-market sale.

Context

• These entries reflect routine RSU vesting and net-share withholding for taxes (issuer retained shares), not an open-market sale or purchase. The M code indicates conversion/exercise of derivative awards (RSUs); the F code indicates tax withholding.
• Such vesting-and-withholding transactions are common and typically reflect compensation vesting rather than a signal of insider buying or selling intent.