  Folding identical legs of a simply-laced quiver creates a quiver with a
non-simply laced edge. So far, this has been explored for quivers containing
unitary gauge groups. In this paper, orthosymplectic quivers are folded, giving
rise to a new family of quivers. This is realised by intersecting orientifolds
in the brane system. The monopole formula for these non-simply laced
orthosymplectic quivers is introduced. Some of the folded quivers have Coulomb
branches that are closures of minimal nilpotent orbits of exceptional algebras,
thus providing a new construction of these fundamental moduli spaces. Moreover,
a general family of folded orthosymplectic quivers is shown to be a new
magnetic quiver realisation of Higgs branches of 4d $\mathcal{N}=2$ theories.
The Hasse (phase) diagrams of certain families are derived via quiver
subtraction as well as Kraft-Procesi transitions in the brane system.
