CEO David Rosenblatt Acquires Additional 1stdibs.com Stock in Multiple Transactions

This Form 4 filing reports that David S. Rosenblatt, Chief Executive Officer and Director of 1stdibs.com, Inc., acquired additional shares of the company's common stock on May 12, 2026. Rosenblatt purchased 43,755 shares at $4.5105 per share, 3,425 shares at $4.4916 per share, and 320 shares at $4.349 per share, for a total of 47,500 shares acquired. These purchases were made indirectly through the 2012 David Rosenblatt Family Trust. Following these transactions, Rosenblatt's total ownership includes 2,047,198 shares held directly and 22,500 shares held indirectly through the 2024 Laura Thalheimer Rosenblatt Family Trust, plus the newly acquired shares. The filing demonstrates continued insider confidence in the company through substantial share purchases at prices ranging from $4.349 to $4.5105 per share. The transactions occurred on a single day and were filed with the SEC on May 13, 2026.