Calculated subtable

Here is one way.

First, create a new table using "Enter data" in the ribbon under home and type in:

I have also created dimension tables for Owner and Company. The model looks like this:

Next create two measures :

Customers by group =
COUNTROWS (
    SUMMARIZE (
        FILTER (
            FTable,
            [Revenue by company] >= SELECTEDVALUE ( Tier[MinThreshold] )
                && [Revenue by company] <= SELECTEDVALUE ( Tier[MaxThreshold] )
        ),
        'Dim Company'[dCompany],
        'Dim Owner'[dOwner]
    )
)

And for the final matrix:

Count by Group = 
SUMX(Tier, [Customers by group])

Create the matrix with the "Dim Owner" field as rows and the Tier table Groups as columns and add the [Count by group] measure to get: