Browse Entities - P
- P & O
- see Peninsular and Oriental Steam Navigation Company (1840 - ) - P. Cleland and Sons (1945 - )
- P. W. Williamson & Company (? - 1923)
- P.D.S. Co-operative Limited
- P.D.S. Rural Products Limited
- P.O. Fysh and Company
- Pacific Aerial Transport Company (1930 - 1936)
- Pacific Brands Limited (2001 - 2016)
- Pacific Dunlop Limited (1986 - 2002)
- Pacific Oil Company (1932 - 1935)
- Pacific Publications Pty Ltd
- Packsaddle Station
- Paddle Brothers Pty Ltd
- Paine, J. Ross & Company (1888 - 1967)
- Palmer, Preston & Company (? - 1911)
- Papua Air Transport (1952 - 1953)
- Papua Airways (1929 - 1931)
- Papuan Air Transport (1952 - )
- Parattah Hotel Company Limited
- Parbury Henty and Company Pty Ltd
- Paringa Mining Company Limited (c. 1898 - 1953)
- Parker & Parker (1881 - )
- Parnell and Sons
- Paroo Pastoral Company
- Pasminco - EZ (1916? - )
- Pastoral Company Limited
- Paterson Laing and Bruce Limited [I] (1898 - 1901)
- Paterson Palmer & Company
- Paterson Ray Palmer & Company ( - 1876)
- Paterson, Laing and Bruce
- Paterson, Laing and Bruce (1901) Limited (1901 - 1903)
- Paterson, Laing and Bruce Limited [II] (1903 - 1966)
- Paterson, Laing and Company (1876 - )
- Paterson, Reid and Bruce Limited (1966 - )
- Patons and Balwins
- Peak Downs Copper Mine Company
- Peak Hill Goldfields Limited
- Peapes & Company Limited
- Peapes Pty Ltd
- Pearce & Company
- Pearson Rowe, Smith & Company Pty Ltd (1884? - 1939)
- Pearson, Robert John Butler (1918 - 1999)
- Peel River Land and Mineral Company Limited (1853 - )
- Peerless Roller Flour Mill Company
- Peet & Company
- Peko Wallsend Limited (? - 1988)
- Penfolds Wines Australia Limited
- Peninsular and Oriental Steam Navigation Company (1840 - )
- Peoples Printing and Publishing Company of Western Australia
- Perdriau Rubber Company Limited (1904 - 1929)
- Permanent Economic Loan, Land, Building and Investment Society Incorporated (1878 - 1970)
- Permanent Trustee Company of New South Wales Limited (1887 - )
- Permewan Wright & Company Limited (1884 - 1927)
- Permewan Wright Limited (1927 - )
- Perpetual General Insurance and Guarantee Company (1945 - 1959)
- Perpetual Trustee Company Limited (1886 - )
- Perricoota Station [New South Wales]
- Perry Engineering Company Limited
- Perth and Fremantle Bottle Exchange (1907 - 1964)
- Perth Building Society (1862 - 1987)
- Perth Chamber of Commerce (1890 - )
- Perth Gas Company Limited (1883 - )
- Peter Cullen Pty Ltd
- Peters Bros, Wade & Allison Pty Ltd
- Peters Foods Pty Ltd
- Phillip Morris (Australia) Limited
- Phoenix Alluvial Tin Mining Company
- Pierce Matthews Limited
- Pike Brothers Pty Ltd
- Pinnacles Station [Western Australia] (1890s - )
- Pioneer Cheese and Butter Factory Company Limited
- Pioneer International Limited
- Pioneer Permanent Building Society ( - 2007)
- Pioneer Sugar Mill
- Pioneer Tin Mining Company Ltd
- Piper, Bakewell and Piper
- Pitt, Son & Badgery Limited (1888 - 1976)
- Pitty, Sheedy and Dollar (1908 - 1919)
- Plaimar Limited (1919 - 1974?)
- Plane Creek Central Mill Company Limited
- Plummers Somerville Joinery & Timber Mills Pty Ltd
- Polymer Corporation Pty Ltd
- Polynesia Company Limited
- Pope Industries Limited (1945 - )
- Pope Products Limited (1931 - 1945)
- Pope Sprinklers Limited (1928 - 1931)
- Popes Sprinkler and Irrigation Company (1925 - 1928)
- Port Adelaide Dredging Company Limited
- Port Phillip and Colonial Gold Mining Company
- Port Phillip Savings Bank
- see The Savings Bank of Port Phillip (1842 - 1853) - Portland Cement Company Limited
- Portland Co-operative Dairy Company Limited (1912 - 1966)
- Portland Downs Pastoral Company Limited
- Post Office Savings Bank of Tasmania (1882 - 1901)
- Post Office Savings Bank of Western Australia (1863 - 1908)
- Poultry Farmers Co-operative Society (Queensland) Limited
- Power Plant Limited
- Prairie Station [Queensland]
- Premier Bakery
- Prendergast, Wood & Company (1876 - 1887)
- Prestige Limited (1922 - 1969)
- Preston Motors (Holdings) Limited
- Price Maurice & Company
- Prime Television Limited
- Printing Union Co-operative Credit Society Limited (1965 - )
- Producers Co-operative Distributing Society Limited
- Provident Building Society (? - 1983)
- Provincial Co-operative Society Limited
- Provincial Gas Company
- Provincial Newspapers (Qld) Limited
- Purnell and Sons
- Purr Pull Company Pty Ltd (? - 1953)
- Pyramid Building Society Limited
- Pyramid Co-operative Society Limited ( - 1965)
- Pyramid Hill and District Dairy Produce Company Limited (1895 - 1945)