James M. Mock, Chief Financial Officer of Moderna, Inc. (NASDAQ:MRNA), filed a Form 4 on August 31, 2026, disclosing restricted stock unit vestings and related share withholdings that occurred on August 27 and August 28, 2026.

Key Highlights

  • RSU vesting on August 27: 774 restricted stock units converted into 774 shares of common stock on a one-for-one basis.
  • Shares withheld on August 27: 375 shares were withheld at a price of $149.66 per share to satisfy tax withholding obligations.
  • RSU vesting on August 28: 329 restricted stock units converted into 329 shares of common stock on a one-for-one basis.
  • Shares withheld on August 28: 160 shares were withheld at a price of $142.77 per share to satisfy tax withholding obligations.
  • Resulting direct ownership: 67,004 shares of common stock beneficially owned directly following all reported transactions.
  • Remaining RSUs: 4,642 and 658 restricted stock units remain outstanding following the respective vestings.

Moderna CFO Mock's RSU Transactions: Vesting Schedule and Tax Withholding Details

According to the filing, James M. Mock, serving as Chief Financial Officer of Moderna, Inc., reported two separate restricted stock unit vesting events across consecutive days. On August 27, 2026, 774 RSUs vested and converted into an equal number of common shares. The filing indicates 375 of those shares were withheld at $149.66 per share at the election of the reporting person to satisfy tax withholding obligations, leaving a direct beneficial ownership of 66,835 shares immediately after that transaction.

On August 28, 2026, an additional 329 RSUs vested and converted to common stock on a one-for-one basis. The filing discloses that 160 shares were withheld at $142.77 per share, again to cover tax withholding. Following this second transaction, the filing reports direct beneficial ownership of 67,004 shares of common stock. The filing notes that the share withholding was made at the election of the reporting person.

The filing explains that the August 27 RSU award originally began vesting with 25% on February 27, 2025, with the remainder vesting in twelve equal quarterly installments thereafter, leaving 4,642 RSUs outstanding. The August 28 RSU award initially vested 25% on February 28, 2024, with the remainder also vesting in twelve equal quarterly installments, leaving 658 RSUs outstanding. All RSU conversions carried a derivative security price of $0, as stated in the filing. The form was signed by James Dillon as attorney-in-fact on August 31, 2026.

What Was Disclosed

The filing reports RSU vestings of 774 and 329 shares on August 27 and August 28, 2026, respectively, with tax-related share withholdings of 375 shares at $149.66 and 160 shares at $142.77, resulting in direct beneficial ownership of 67,004 shares.