Nobiliary ran four times as a two-year-old in 1974. After finishing third over 1400 metres on her racecourse debut she won a maiden race over 1700 metres at Longchamp Racecoursein September, beating Beautiful Sea by one and a halflengths. She was then moved up sharply in class and matched against colts when she contested France's most prestigious race for juveniles, the Grand Criterium over 1600 metres at Longchamp on 13 October. Ridden by Maurice Philipperon she started at odds of 13/1 and finished sixth of the ten runners, nine lengths behind the winner Mariacci. On her final appearance of the season she finished third behind Dona Barod and Good Start in the Prix des Reservoirs over the same course and distance.
1975: three-year-old season
Spring
Nobiliary began her three-year-old season in the Prix de la Grotte over 1600 metres at Longchamp in April and won by a length from Lighted Glory, a filly who went on to finish fifth in the 1000 Guineas. On 4 May, Nobiliary, accompanied by her pacemaker Amata, started 3/1 second favourite for the Poule d'Essai des Pouliches over the same course and distance. Ridden by the British jockey Lester Piggott, she took the lead from Amata in the straight but was overtaken in the closing stages and was beaten one and a half lengths, with the odds-on favourite Broadway Dancer six lengths back in third place. The filly was then moved up in distance for the Prix Saint-Alary over 2000 metres on 25 May. Again ridden by Piggott she started the 8/5 favourite and recorded her first Group One win, beating Lighted Glory by two lengths.
Summer
In a highly unusual move, Nobiliary was then send to England and was matched against colts for the 196th running of the Epsom Derby, a race in which no filly had finished in the first three since Fifinella won a wartime version in 1916. Ridden by Yves Saint-Martin she ran on strongly in the straight to finish second to Grundy, three lengths behind the winner and four lengths clear of Hunza Dancer in third. Maurice Zilber later expressed the view that Nobilary could have won the race if Saint-Martin had made more use of the filly's stamina. Nobiliary was scheduled for a rematch with Ivanjica in the Prix de Diane but when the race was abandoned owing to industrial action by stable staff, she was rerouted to the Eclipse Stakes at Sandown Park Racecourse. As well as being matched against older horses for the first time, she was racing on firmer ground than she had previously encountered. She looked very unsettled before the start and after racing prominently for most of the race but looked outpaced in the closing stages and finished fifth behind the German horse Star Appeal. Nobiliary returned to one and a half miles for a clash with The Oaks winner Juliette Marny in the Irish Oaks at the Curragh Racecourse on 18 July. Piggott opted to ride Juliette Marny, the 5/2 favourite, whilst Nobiliary, ridden by Billy Pyers started at 3/1. Nobiliary moved into second place early in the straight but could make no further progress and eventually finished third, beaten a neck and two lengths Juliette Marny and Tuscarora.
Autumn
On her return from a summer break, Nobiliary started second favourite behind Ivanjica for the Prix Vermeille on 21 September, a race which also attracted the Oaks d'Italia winner Carnauba and the British filly May Hill, who defeated Juliette Marny in the Yorkshire Oaks. The finish of the race was similar to that of the Poule d'Essai des Pouliches with Nobiliary taking the lead in the straight before being outsprinted by Ivanjica and beaten one and a half lengths. The pair finished eight lengths clear of May Hill in third. In France's most prestigious horse race, the Prix de l'Arc de Triomphe at Longchamp on 5 October, she was coupled in the betting with Nelson Bunker Hunt's five-year-old mare Dahlia, and the pair started fourth in the betting on 8.75/1. Ridden by Pyers, she disputed the lead from the start before being overtaken 300 metres from the finish and eventually finished sixth behind Star Appeal. Pyers, who had been unseated by Nobiliary before the start, received some criticism for failing to exercise more restraint on the filly in the early stages. On 8 November Nobiliary and Dahlia started joint-second favourites for the 24th running of the Washington D C International at Laurel Park Racecourse in Maryland. The market was headed by Snow Knight who had won the Epsom Derby in 1974, before being transferred to North America where he had won several major races including the Man o' War Stakes, Manhattan Handicap and Canadian International Championship. The other contenders included Star Appeal from Germany, Laomedonte from Italy, Comtesse de Loir and On My Way from France, :jp:ツキサムホマレ|Tsukisamu Homare from Japan and Shady Character representing the United States. With her intended jockey Yves Saint-Martin unable to ride at 117 pounds, Nobiliary was ridden by the Canadian Sandy Hawley. Hawley sent the filly into the lead from the start and set a very fast pace, with only Shady Character attempting to match her early speed: at one point the pair went seven lengths clear of the field making it appear to some observers that she was being employed as a pacemaker for Dahlia. Several challengers emerged on the final turn but Nobiliary rallied strongly in the straight and Comtesse de Loir emerged as her only serious danger. In the final strides Nobiliary edged away from the rail, slightly hampering Comtesse de Loir but prevailed to win by three-quarters of a length, with On My Way taking third place to complete a clean sweep of the places for French-trained horses.
Assessment
There was no International Classification of European two-year-olds in 1974: the official handicappers of Britain, Ireland and France compiled separate rankings for horses which competed in those countries. In the official French handicap, Nobiliary was rated fourteen pounds inferior to the top-rated Mariacci and twelve pounds below the top filly Broadway Dancer. The independent Timeform organisation gave her a rating of 112, nineteen pounds below Broadway Dancer. In their annual Racehorses of 1974, Timeform described her as certain to stay one and a half miles and "the type to do well at 3 yrs". In the official French handicap for 1975, Nobiliary was rated the second best three-year-old filly of the year behind Ivanjica. Timeform gave her a rating of 131, making her their third-best three-year-old filly behind Rose Bowl and Ivanjica.
Breeding record
It was expected that Nobiliary would remain in training as a four-year-old but she never raced again after her win at Laurel Park and was retired to become a broodmare. She was unsuccessful in her new role, producing only two recorded foals: Winnsboro and Libillary neither of whom made any impact as racehorses. At Nelson Bunker Hunt's dispersal sale in 1988, she was sold for $325,000 to the Allez France Stable, but never produced another foal.
