Trying to get subtotals from a collection

I am lost in this collection ...

I have a bunch of records like these:

Illuminate\Database\Eloquent\Collection {#3627
     all: [
       App\Models\ArAging {#3703
         id: 3,
         amt: 1500.0,
         balance: 1500.0,
         city: "Atlanta",
         company_code: "DLA",
         company_name: "XXX Airlines ",
         due_date: "2021-01-21",
         due_days: 45,
         entry_date: "2020-12-07",
         max_credit: 3300000.0,
         term_code: "NET 45",
       },
       App\Models\ArAging {#4202
         id: 31,
         amt: 1250000.0,
         balance: 1250000.0,
         city: "Bismark",
         company_code: "AZI3",
         company_name: "XXX Engines",
         due_date: "2020-12-10",
         due_days: 60,
         entry_date: "2020-11-28",
         max_credit: 50000000.0,
         term_code: "NET 60",
       },
       App\Models\ArAging {#4246
         id: 76,
         amt: 800.0,
         balance: 2300.0,
         city: "Atlanta",
         company_code: "DLA",
         company_name: "XXX Airlines ",
         due_date: "2020-12-12",
         due_days: 45,
         entry_date: "2020-10-28",
         max_credit: 3300000.0,
         term_code: "NET 45",
       }]

You can see the companies can have one or more records and they are mixed up. I am trying to extract a "subtotal" line by company.

$reporter = [];
$raw = ArAging::all();

$companies = $raw->pluck('company_code')->unique();

foreach($companies as $company) {
	$comp = $raw->filter(fn($co)=>$co->company_code == $company);
  
  	$code = $comp->pluck('company_code')->unique();

	$name = $comp->pluck('company_name')->unique();

	$credit_limit = $comp->pluck('max_credit')->unique();

	$terms = $comp->pluck('term_code')->unique();
  
  	$sales = $comp->sum('amt');
  
  	$balance = $comp->last()->balance;
  
  $reporter[] = [
  	'company_code' => $code,
    'company_name' => $name,
    'credit_limit' => $credit_limit,
    'terms' => $terms,
    'sales' => $sales,
    'balance' => $balance
  ];
} // end foreach

return $reporter;

This is returning

[!] Aliasing 'ArAging' to 'App\Models\ArAging' for this Tinker session.
=> [
     "company_code" => Illuminate\Support\Collection {#4247
       all: [
         "DLA",
       ],
     },
     "company_name" => Illuminate\Support\Collection {#4127
       all: [
         "XXX Airlines ",
       ],
     },
     "credit_limit" => Illuminate\Support\Collection {#4041
       all: [
         3300000.0,
       ],
     },
     "terms" => Illuminate\Support\Collection {#4146
       all: [
         "NET 45",
       ],
     },
     "sales" => 4800.0,
     "balance" => 2300.0,
   ]

rather than what I am looking for

[
    'company_code' => 'DLA',
    'company_name' => 'XXX Airlines',
    'credit_limit' => 3300000.0,
    'terms' => 'NET 45',
    'sales' => 4800.0,
    'balance' => 2300.0
  ]