  We report on the X-ray monitoring programme (covering slightly more than 11
days) carried out jointly by XMM-Newton and NuSTAR on the intermediate Seyfert
galaxy Mrk 915. The light curves extracted in different energy ranges show a
variation in intensity but not a significant change in spectral shape. The
X-ray spectra reveal the presence of a two-phase warm absorber: a fully
covering mildly ionized structure [log xi/(erg cm/s)~2.3, NH~1.3x10^21 cm-2]
and a partial covering (~90 per cent) lower ionized one [log xi/(erg cm/s)~0.6,
NH~2x10^22 cm-2]. A reflection component from distant matter is also present.
Finally, a high-column density (NH~1.5x10^23 cm-2) distribution of neutral
matter covering a small fraction of the central region is observed, almost
constant, in all observations. Main driver of the variations observed between
the datasets is a decrease in the intrinsic emission by a factor of ~1.5.
Slight variations in the partial covering ionized absorber are detected, while
the data are consistent with no variation of the total covering absorber. The
most likely interpretation of the present data locates this complex absorber
closer to the central source than the narrow line region, possibly in the broad
line region, in the innermost part of the torus, or in between. The neutral
obscurer may either be part of this same stratified structure or associated
with the walls of the torus, grazed by (and partially intercepting) the line of
sight.
