The Jockey Club Plate, not to be confused with the Newmarket Town Plate which was first run on the Round Course in 1666, was restricted to Jockey Club Members and run at Newmarket annually. The earliest record of a Jockey Club Plate was in 1753 when two were staged two days apart. The first, for 4-year-olds, was run on the Round Course on Tuesday 15th May 1753 and won by Beau Clincher owned by Lord Gower, while 2 days later a second subscription Plate for 100 Guineas was contested on Thursday 17th May 1753 and was won by Crab owned by Captain Vernon. The races provide vital evidence confirming membership of the Jockey Club.

Tuesday 14th April 1761
Subscription Purse of 100 Guineas over 4 miles of the Round Course for 4-year-olds the property of Jockey Club Members, each horse to carry 8st
1. ALIPES, brown filly owned by Mr Swinburn
2. Brown filly owned by Sir John Moore
3. Chestnut filly owned by Lord Chedworth
4. Bay colt owned by Sir Charles Sedley
5. Bay colt owned by Lord Waldegrave
6. Chestnut colt owned by the Duke of Kingston
7. BOUNCE, bay colt owned by the Duke of Richmond
8. Bay colt owned by Lord Orford
9. JUNIER, bay colt owned by Lord Portmore
10. Bay filly owned by Sir James Lowther
11. Bay filly owned by the Duke of Bridgewater
12. Bay filly owned by Lord Gower

Thursday 16th April 1761
Second Subscription Purse of 100 Guineas, over the Beacon Course, for horses the property of Jockey Club Members, each horse to carry 9st
1. SPORTSMAN, bay horse owned by Mr Warren
2. MOLLY LONG-LEGS, bay mare owned by Mr Greville
3. BOSPHOROUS, bay horse owned by Lord Portmore
4. REMUS, bay horse owned by Lord Rockingham
5. SHOCK, chestnut horse owned by Lord Gower
6. ROSE, chestnut mare owned by Mr Richard Vernon
7. FOXHUNTER, chestnut horse owned by Lord Orford
8. BELFORD, bay horse owned by Lord Grosvenor
9. CATO, bay horse owned by HRH Duke of Cumberland