The number of species having a square planar shape from the...

${XeF}_{4}$ is ${sp}^{3}{d}^{2}$ hybridised with two lone pairs of electrons, hence, it is square planar.

${SF}_{4}$ is ${sp}^{3}d$ hybridised with one lone pairs of electrons, hence, it is See saw.

${SiF}_{4}$ is ${sp}^{3}$ hybridised with zero lone pairs of electrons, hence, it is Tetrahedral

${{BF}_{4}}^{-}$ is ${sp}^{3}$ hybridised with zero lone pairs of electrons, hence, it is Tetrahedral

$[ Cu ( {NH}_{3}{)}_{4} ] {}^{2 +}$is ${dsp}^{2}$ hybridised and is Square planar

$[ {FeCl}_{4} ] {}^{2 –}$ is ${sp}^{3}$ hybridised and is Tetrahedral

$[ {PtCl}_{4} ] {}^{2 –}$is ${dsp}^{2}$ hybridised and is Square planar

${{BrF}_{4}}^{-}$ is ${sp}^{3}{d}^{2}$ with Square planar geometry.

So, $4$ square planer shape compounds are present.