Frank Williams developed his motorsport career as a driver in saloon cars and Formula Three before recognising that his talents lay in team management rather than driving. He built early income as a dealer in racing cars and spares, and backed his friend Piers Courage in a successful 1968 Formula Two season.
For 1969, Williams purchased a Brabham Formula One car for Courage. The season produced remarkable results: Courage took second place at both the Monaco Grand Prix and the United States Grand Prix, establishing Williams as a credible team in the Formula One paddock. Their efforts attracted Italian sports car manufacturer De Tomaso, who built a Formula One chassis designed by Giampaolo Dallara for the 1970 season. The De Tomaso proved uncompetitive, failing to finish the first four races. At the Dutch Grand Prix, the De Tomaso 505/38 flipped and caught fire; Courage was killed. The death of his close friend had a lasting effect on Williams, and the distance he subsequently maintained from his drivers was widely attributed to this trauma.
The team continued with Brian Redman and then Tim Schenken driving the De Tomaso for the remainder of 1970, but without results, and the partnership was dissolved.
With no constructor partner, Williams purchased a year-old March 701 for 1971 and ran French driver Henri Pescarolo. The team later upgraded to a new March 711, but results were difficult to come by. Pescarolo nonetheless kept the operation viable with a fourth place at the British Grand Prix and sixth in Austria. Williams was operating hand-to-mouth from race to race, relying on his ability to find funding and cut deals to keep the car on the grid.
For 1972, French oil company Motul joined as a backer, enabling Williams to purchase a March 721 for Pescarolo, while Italian toy manufacturer Politoys provided additional funding to develop an in-house chassis.
The Politoys FX3, designed by Len Bailey, was a conventional Cosworth-engined car with a Hewland FG400 gearbox. It debuted in Pescarolo's hands at the 1972 British Grand Prix but suffered steering failure and was heavily damaged. After a single further non-championship appearance for Chris Amon, the car's future was rebranded when Motul and Politoys withdrew at the end of the year.
Williams attracted new backing for 1973 from cigarette giant Marlboro and Italian sports car manufacturer Iso Autoveicoli. The reworked car became the Iso–Marlboro FX3B, with two new drivers: New Zealand's Howden Ganley and Italy's Nanni Galli. After Galli was injured testing a sports car, local drivers and substitutes rotated through the second seat. A new car, the Iso–Marlboro IR, was introduced mid-season at the Spanish Grand Prix. Eight different drivers raced it through the rest of 1973, with Ganley scoring a point at the Canadian Grand Prix and Dutch driver Gijs van Lennep adding another in the Netherlands.
Both Iso Rivolta and Marlboro withdrew before 1974, leaving Williams financially exposed. The two IR chassis were retained and redesignated the FW — standing for Frank Williams — with Arturo Merzario as the primary driver. Merzario placed sixth in South Africa early in the season. The second seat cycled through pay-drivers until Jacques Laffite was brought in to partner Merzario, and performance gradually improved. Merzario's fourth-place finish at Monza gave the team four points and another tenth-place finish in the Constructors' Championship. The three FW chassis used in 1974 were renamed FW01, FW02, and FW03 for the following year.
The 1975 season saw Williams commission a new car, the FW04 — the first chassis to carry the Williams name from the outset. Promising British driver Tony Brise drove it at the Spanish Grand Prix, finishing seventh. The team's financial difficulties, however, remained severe. Merzario left after Belgium, replaced by a succession of six paying drivers across the remaining rounds. A young engineer named Patrick Head joined the organisation around this time.
The season's defining moment arrived at the German Grand Prix, where Laffite drove the FW04 to second place behind Carlos Reutemann's Brabham — a remarkable result for a team on the edge of collapse. It provided crucial financial relief, but was the team's only points finish of 1975.
Before 1976, Canadian oil millionaire Walter Wolf purchased a 60% stake in Frank Williams Racing Cars, renaming it Wolf–Williams Racing. Frank Williams was retained as team manager, and Harvey Postlethwaite arrived as chief engineer. The team also acquired assets from the recently-withdrawn Hesketh Racing operation, including the Hesketh 308C, which was rebranded as the Wolf–Williams FW05.
At the end of 1976, Wolf restructured the team, installing former Team Lotus manager Peter Warr and removing Frank Williams from his managerial role. Disillusioned, Williams left entirely, taking Patrick Head with him to form Williams Grand Prix Engineering in 1977. Wolf bought the remaining stake to create Walter Wolf Racing. The Piers Courage-era team name was gone, but the foundations Williams had laid — the contacts, the engineering culture, the constructor identity — fed directly into the dynasty that would accumulate seven Constructors' Championships.