RS

No tax on grant. Tax at vesting, unless employee elects to be taxed on grant under Section 83(b).

Taxable amount is fair market value of the shares on the tax event (less any amount the employee pays for the shares).

Tax on sale of shares. Long-term capital gain rates apply if shares held more than 1 year.

RSU

Tax when shares made available or delivered at or after vesting. However, on May 22, 2020, the IRS released General Legal Advice Memorandum (GLAM) AM 2020-004, which expressed the view that the taxable event is the date the employer "initiates payment" of the RSUs by requesting that its transfer agent transfer shares to the employee. While the GLAM is non-binding precedent, it expresses the IRS Office of Chief Counsel's position. Taxable amount is fair market value of the shares on the tax event (less any amount the employee pays for the shares).

Tax on sale of shares. Long-term capital gain rates apply if shares held more than 1 year.

Income Tax:

Yes.

Social Insurance Contribution:

Yes. Employer pays its share and withholds employee's share.

Yes, but simple registration (Form S-8) applies for public company plans and exemptions are generally available for most private company plans.

While there are no federal data privacy requirements, please note, the California Consumer Privacy Act ("CCPA") became effective as of 1 January 2020. The CCPA imposes a broad range of new requirements for the collection and processing of personal data of California residents.

Other U.S. states may have or may adopt similar data privacy requirements.