MRNA Form 4: CFO James Mock Converts RSUs; Tax Withholding Reported
Rhea-AI Filing Summary
Insider transactions by Moderna CFO James M. Mock: The filing reports restricted stock unit (RSU) activity for James M. Mock on 08/27/2025 and 08/28/2025. On 08/27/2025, 774 RSUs were converted into 774 shares of common stock and 375 shares were withheld to satisfy tax withholding, leaving 17,340 shares beneficially owned after the reported sale or disposition. On 08/28/2025, 329 RSUs converted into 329 shares and 160 shares were withheld for taxes, leaving 17,509 shares beneficially owned. Vesting schedules for the awards are disclosed and tax-withholding elections are noted.
Positive
- RSU conversions into common stock were reported, demonstrating compensation realization through standard vesting.
- Vesting schedule disclosed (25% initial vest with quarterly installments) provides transparency on award terms.
- Tax withholding election was executed to cover obligations, which avoids open-market sell-offs to satisfy taxes.
Negative
- Shares withheld for tax (375 on 08/27/2025 and 160 on 08/28/2025) reduced the net shares received from vesting.
Insights
TL;DR: Routine executive RSU vesting and withholding; modest net share increases reported, no cash trades disclosed.
The Form 4 discloses non-derivative acquisitions from RSU vesting on 08/27/2025 and 08/28/2025 and corresponding share withholding to cover tax obligations. The transactions reflect scheduled vesting under previously granted awards rather than open-market purchases or stock sales. Reported beneficial ownership totals (around 17.3k–17.7k shares) are consistent with an officer-level holding and there is no indication of derivative exercise for cash proceeds. Impact on share count is limited to tax-withheld shares, and the filing does not disclose any material change in ownership percentage.
TL;DR: Disclosure aligns with Rule 16 timing and shows tax-withholding elections on vested RSUs; procedural and routine.
The report provides required disclosure of RSU vesting events and the reporting person’s election to have shares withheld to satisfy tax withholding. Vesting schedules are documented, showing initial 25% vesting dates with subsequent quarterly vesting, matching typical executive compensation arrangements. The filing is procedural, timely (filed 08/29/2025), and signed by an attorney-in-fact, meeting signature requirements. No governance concerns or unusual compensation practices are evident from the disclosed transactions alone.
Insider Trade Summary
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Restricted Stock Units | 329 | $0.00 | -- |
| Exercise | Common Stock | 329 | $0.00 | -- |
| Tax Withholding | Common Stock | 160 | $25.10 | $4K |
| Exercise | Restricted Stock Units | 774 | $0.00 | -- |
| Exercise | Common Stock | 774 | $0.00 | -- |
| Tax Withholding | Common Stock | 375 | $24.73 | $9K |
Footnotes (1)
- Restricted stock units convert into common stock on a one-for-one basis. Represents shares withheld at the election of the Reporting Person to satisfy tax withholding obligations in connection with the vest of restricted stock units. 25% of the shares subject to this restricted stock unit award vested on February 27, 2025 with the remainder vesting in twelve (12) equal quarterly installments thereafter. 25% of the shares subject to this restricted stock unit award vested on February 28, 2024 with the remainder vesting in twelve (12) equal quarterly installments thereafter.
