Hide car manufacturers with less than 10 entries
Hide car manufacturers who only participated in Indy 500
Ignore non-championship races
| No | Car Manufacturer | Races | Active Years |
|---|
| 1 | AC (Non-champ only) | 1 |
1950 |
| 2 |  Adams (Indy only) | 1 |
1950 |
| 3 | ADM (Non-champ only) | 1 |
1952 |
| 4 |  AFM | 31 |
1949, 1952–1954, 1959 |
| 5 |  AGS | 81 |
1979, 1986–1991 |
| 6 |  Aiden-Cooper | 13 |
1962 |
| 7 | Aitken (Non-champ only) | 4 |
1948–1949 |
| 8 | AJB (Non-champ only) | 3 |
1950–1951 |
| 9 |  Alfa Romeo | 258 |
1945–1954, 1979–1985, 2019–2023 |
| 10 | Allard (Non-champ only) | 4 |
1950, 1952, 1954 |
| 11 | AlphaTauri | 83 |
2020–2023 |
| 12 | Alpine | 109 |
2021–2025 |
| 13 | Alta | 58 |
1946–1954, 1961 |
| 14 | Alvis (Non-champ only) | 3 |
1947, 1952, 1954 |
| 15 | Amilcar (Non-champ only) | 13 |
1945–1947 |
| 16 |  Amon | 5 |
1974 |
| 17 | Andrea Moda | 9 |
1992 |
| 18 | Andrew (Non-champ only) | 1 |
1950 |
| 19 |  Apollon | 1 |
1977 |
| 20 | Appleton (Non-champ only) | 1 |
1946 |
| 21 | Ardun (Non-champ only) | 1 |
1952 |
| 22 | ARO (Non-champ only) | 4 |
1953 |
| 23 | Arrows | 327 |
1978–1990, 1997–2002 |
| 24 | Arzani-Volpini | 1 |
1955 |
| 25 | ASD (Non-champ only) | 1 |
1971 |
| 26 | Ashford (Non-champ only) | 1 |
1950 |
| 27 | Assegai (Non-champ only) | 2 |
1962, 1965 |
| 28 | Aston | 15 |
1952–1953 |
| 29 | Aston Martin | 128 |
1945–1947, 1950, 1952, 1954, 1959–1962, 2021–2025 |
| 30 | ATS | 109 |
1978–1984 |
| 31 | ATS (Ita) | 5 |
1963 |
| 32 | Ausper (Non-champ only) | 3 |
1961, 1966–1967 |
| 33 | Austin (Non-champ only) | 4 |
1960–1961 |
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