40 Pa. Stat. § 361
The word "company," as used in this act, shall be construed to include incorporated insurance companies only, and title insurance companies, whether incorporated under the laws of this Commonwealth, or any other state, territory, or district, or under the laws of any foreign country.
Except where otherwise indicated, the word "association," as used in this act, shall be construed to include only individuals, partnerships or associations of individuals, authorized to engage in the business of insurance in the Commonwealth as insurers on the Lloyds plan.
The word "exchange," as used in this act, shall be construed to include only individuals, partnerships and corporations, authorized by the laws of the Commonwealth to exchange with each other inter-insurance or reciprocal insurance contracts.
40 P.S. § 361