Is Form 941 a summary of FUTA?

No. Form 941 is Employer's Quarterly Federal Tax Return. It is used to report taxes (income, Social Security, Medicare) that are withheld from your employees' paychecks. Form 940 is Employer's Annual Federal Unemployment (FUTA) Tax Return. Form 940 reports the FUTA tax that applies to the first $7,000 paid to each employee.