We present a new experimental version of the differentiation-enabled NAGWare Fortran 95 compiler (from now on referred to as “the AD compiler”) that provides support for the computation of adjoints in the reverse mode of automatic differentiation (AD) [42, 136, 227]. Our implementation uses split program reversal [225, Chapter 10] in conjunction with a stack of gradients of all assignments executed inside the active section. Two papers describe the modifications of the compiler infrastructure that were required to provide forward-mode AD capabilities [126, 401]. The reverse mode presented in this paper makes extensive use of these features.