Backblaze CFO Marc Suidan's Stock Transactions - ESPP Purchase and RSU Settlements

This Form 4 filing reports three transactions by Backblaze CFO Marc Suidan involving the company's Class A Common Stock. On May 19, 2026, Suidan acquired 2,500 shares at $3.68 per share through the company's Employee Stock Purchase Plan (ESPP) for the November 2025-May 2026 purchase period, bringing his total holdings to 380,980 shares. The following day, May 20, 2026, he disposed of 269 shares at $7.43 per share, reducing his holdings to 380,711 shares. Additionally, on May 20, 18,000 restricted stock units (RSUs) were settled in cash at $7.43 per share rather than issuing stock, further reducing his holdings to 362,711 shares. The ESPP transaction was exempt under Rule 16b-3(c), with the purchase price set at 85% of the lower of the closing price on the first day of the purchase period ($4.33) or the purchase date.