Form 4 Filing for Paul V. Maier

This filing details transactions by Paul V. Maier, a director at International Stem Cell Corp. On June 11, 2026, Maier acquired 30,000 stock options with a vesting date of June 11, 2027, or the next annual meeting, whichever comes first. Additionally, he acquired 182,584 stock options vesting quarterly through June 11, 2027, with the first increment on September 11, 2026. Both option grants have an exercise price of $0.17 and $0.178 respectively, and expire on June 11, 2036. These transactions are considered direct ownership. The filing also notes that these options are not subject to Section 16 of the Securities Exchange Act.