After-tax comparison
Taxes on the vest are the same whatever you do next. Holding vested shares is the same decision as buying ADBE with that cash.
Tax breakdown: RSU
Holding period and withholding
Educational illustration of general U.S. federal rules (IRC § 83; Adobe 2019 Equity Incentive Plan prospectus, Appendix A, Q&A 6). Prices are hypothetical, and the line between dates is a straight-line illustration, not actual ADBE price history. Estimated tax uses the flat rates you enter, not a full return. Not modeled: Social Security and Medicare (RSU income is subject to both), the 0.9% Additional Medicare Tax, the 3.8% net investment income tax, state withholding, AMT, and wash-sale adjustments.
Shares withheld are an estimate (units × withholding rate); E*TRADE shows the actual count. Federal supplemental withholding is a flat 22%, and 37% on supplemental wages above $1 million in a calendar year. Long-term treatment requires holding more than one year after vest. Sales are subject to Adobe's Insider Trading Policy and trading windows (prospectus Q&A 22). Check these figures against your W-2, Form 1099-B supplemental information and E*TRADE account before making a decision, and talk with your tax professional. Not tax advice.