Chevron Federal Credit Union has a special 10-month CD with a yield of 4.15% APY. The minimum deposit is $500, and it's also available for Traditional and Roth IRAs.
As the name would suggest, membership is primarily limited to those who have some working relationship with Chevron. So membership is pretty narrow. Please refer to their Eligibility Search Page for more details. Membership requires a minimum balance of $25 in the savings account.
Branches are located in California, Louisiana, Mississippi and Texas. The credit union is federally insured by the NCUA (Charter # 24326). It has $1.1 billion in assets and 65,285 members.