@foreach ($datos as $key=>$report)
<table>
    <thead>
    <tr>
        <td colspan="5" style="text-align: center; background: gray;color:black">{{ $companies[$key] }}</td>
    </tr>
    <tr>
        <th>MES</th>
        <th>CAN</th>
        <th>CPLA</th>
        <th>CASC</th>
        <th>TOTAL IMPORTACION</th>
    </tr>
    </thead>
    <tbody>
     @foreach($report as $invoice)
        <tr>
            <td>{{$invoice->mes}}</td>
            <td>{{$invoice->can}}</td>
            <td>{{$invoice->cpla}}</td>
            <td>{{$invoice->casc}}</td>
            <td>{{$invoice->totalImportacion}}</td>
        </tr>
     @endforeach
    </tbody>
</table>
@endforeach