MVC 5: initialize nested model

Hi

I have an MVC 5 webpage which uses Partial Views. The partial views on the Main View page uses different Models. I have included all the models as properties in one of the Models, but when I try to add data to the included Models, I get an error saying that the included Model is Null.

Here is my code:

MAIN VIEW (.cshtml)

@{
    Layout = "~/Views/Shared/_Layout.cshtml";
}


@model GbizzVirk_dk.Models.CompanyInfos


<p>
  På denne side kan du vedligeholde virksomhedens kontakt, login og faktureringsoplysninger.
</p>

@Html.Partial("_UpdateCompanyInfo", Model)

@Html.Partial("_UpdateContactInfo", Model.ComConInfo)

@Html.Partial("_UpdateInvoiceInfo", Model.ComInvInfo)

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MODELS (.cs)

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace GbizzVirk_dk.Models
{
  public class CompanyInfo : Controller
  {
    // GET: CompanyInfo
    public ActionResult Index()
    {
      return View();
    }
  }

  public class CompanyContactInfo
  {
    [Required]
    [Display(Name = "Kontaktperson")]
    public string ContactPerson { get; set; }

    [Required]
    [Display(Name = "Kontakttelefon nr.")]
    public string ContactPhone { get; set; }
  }

  public class CompanyLoginInfo
  {
    [Required]
    [Display(Name="Kontakt/login email")]
    public string LoginEmail {get; set;}

    [Required]
    [Display(Name = "Gentag email")]
    public string RepeatLoginEmail { get; set; }
    
    [Required]
    [Display(Name = "Password")]
    public string Password { get; set; }

    [Required]
    [Display(Name = "Gentag password")]
    public string RepeatPassword { get; set; }
  }

  public class CompanyInvoiceInfo
  {
    [Required]
    [Display(Name = "Faktura email")]
    public string AccountEmail { get; set; }

    [Required]
    [Display(Name = "Gentag faktura email")]
    public string RepeatAccountEmail { get; set; }
  }

  public class CompanyInfos
  {
    public CompanyContactInfo ComConInfo;
    public CompanyInvoiceInfo ComInvInfo;

    [Required]
    [Display(Name = "Virksomhedsnavn")]
    public string CompanyName { get; set; }

    [Display(Name = "C/O navn")]
    public string COName { get; set; }

    [Required]
    [Display(Name = "Vejnavn")]
    public string CompanyAddress { get; set; }

    [Required]
    [Display(Name = "Husnr.")]
    public string CompanyHouseNo { get; set; }

    [Required]
    [Display(Name = "Postnummer")]
    public string CompanyZipCode { get; set; }

    [Required]
    [Display(Name = "By")]
    public string CompanyCity { get; set; }

    [Required]
    [Display(Name = "Telefonnummer")]
    public string CompanyPhone { get; set; }

    [Display(Name = "Tilmeld nyhedsbrev")]
    public Boolean NewsLetter { get; set; }
  }
}

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CONTROLLER (Where I try and bind data to the included models)

public class CompanyInfoController : Controller
  {
    //New instance of the Model with the nested models
    CompanyInfos ComInfo = new CompanyInfos();
        
    // GET: CompanyInfo
    public ActionResult ViewCompanyInfo()
    {
      using (SqlConnection con = new    SqlConnection(ConfigurationManager.ConnectionStrings["gbizz"].ConnectionString))
      {
        con.Open();
        SqlCommand sqlCom;
        SqlDataReader sqlReader;

        sqlCom = new SqlCommand("Select * From Customer Where CustomerId = @CustomerId", con);
        sqlCom.CommandType = CommandType.Text;
        sqlCom.Parameters.Add("@CustomerId", SqlDbType.Int).Value = 12;

        sqlReader = sqlCom.ExecuteReader();

        if (sqlReader.HasRows)
        {
          sqlReader.Read();
          //Tilskriver virksomhedsinformationerne til CompanyInfos Class
          ComInfo.CompanyName = sqlReader["Company"].ToString();
          ComInfo.COName = sqlReader["CoName"].ToString();
          ComInfo.CompanyAddress = sqlReader["StreetName"].ToString();
          ComInfo.CompanyHouseNo = sqlReader["StreetNo"].ToString();
          ComInfo.CompanyZipCode = sqlReader["Zipcode"].ToString();
          ComInfo.CompanyCity = sqlReader["City"].ToString();
          ComInfo.CompanyPhone = sqlReader["PhoneNo"].ToString();
          if (sqlReader["Newsletter"].ToString() == "0")
            ComInfo.NewsLetter = false;
          else
            ComInfo.NewsLetter = true;

          //THE LINES BELOW GIVES THE "NULL" ERROR
          ComInfo.ComConInfo.ContactPerson = sqlReader["ContactPerson"].ToString(); 
          ComInfo.ComConInfo.ContactPhone = sqlReader["ContactPersonPhoneNo"].ToString();
          
          ComInfo.ComInvInfo.AccountEmail = sqlReader["AccountEmail"].ToString();
          ComInfo.ComInvInfo.RepeatAccountEmail = sqlReader["AccountEmail"].ToString();          
        }
        sqlReader.Close();
        sqlReader.Dispose();
        sqlCom.Dispose();
        con.Close();
        con.Dispose();
      }
      return View(ComInfo);
    }
}

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Can anyone help me with how to get around this error?