Let $A \in \mathbb{C}^{N \times M}$, $B \in \mathbb{C}^{M \times K}$, and $C \in \mathbb{C}^{K \times H}$ each be a D999: Complex matrix.
Then
\begin{equation}
(A B C)^T
= C^T B^T A^T
\end{equation}
Result R5173
on D398: Matrix transpose
Subresult of R4668: Transpose of a finite product of complex matrices
Subresult of R4668: Transpose of a finite product of complex matrices
Transpose of a product of three complex matrices
Proofs
Let $A \in \mathbb{C}^{N \times M}$, $B \in \mathbb{C}^{M \times K}$, and $C \in \mathbb{C}^{K \times H}$ each be a D999: Complex matrix.
This result is a particular case of R4668: Transpose of a finite product of complex matrices. $\square$