At The Races insisted "no material impact on ATR's profitability is expected" after it was announced Ascot is to switch broadcaster to Racing UK from the start of the 2014 Royal meeting.
Racecourse Media Group-owned Racing UK are responsible for the majority of Britain's major racecourses, including Cheltenham and Newmarket, and Ascot has decided to follow suit.
At The Races, which has exclusive rights to racing in Ireland, lost Exeter, Kelso and Perth to its rivals earlier this year and Folkestone and Hereford will also be missing from next year's line-up as both racecourses will shortly close down.
Ascot officially joins the Racecourse Media Group on June 12, 2014.
A statement posted on the At The Races website read: "At The Races is naturally disappointed that Ascot has chosen not to continue its relationship with the company from June 2014, a relationship which goes back to 2004 and which has at all times been conducted on the best of terms.
"At The Races enjoyed a record year in 2011 and is on track to surpass those achievements in 2012. As a shareholder in the company, as well as a media rights licensor, Ascot is a major beneficiary of this success and, factoring in the company's growth plans going forward, looked set to reap significant further financial returns longer term.
"No material impact on ATR's profitability is expected as a result of this decision as the company's revenue lines continue to grow and diversify. Ascot's rights accounted for 4% of total ATR revenues in 2011."
Ascot's chief executive Charles Barnett said: "After careful consideration we have decided to extend our relationship with RMG, with whom we recently negotiated the exclusive terrestrial television contract with Channel 4.
"We have also partnered with the RMG courses since 2007 in the provision of our pictures to betting shops through Turf TV.
"Enabling a large percentage of the best of British racing to be promoted by one entity and showcased through one satellite broadcaster mirrors the thinking behind the Channel 4 deal, and it should benefit initiatives like the Qipco British Champions Series."
28 August 2015Gosden youngster impresses at HQ
Devonshire chasing deserved success
Ascot date for Dartmouth
Bolger seeking Curragh Smash n grab
Death of northern stalwart Charnock
Ground key for Weld big guns
All-American hero taking next step
Ground key for Cape
Panther pleases in Newmarket work
Icon eyeing Prestige prize
Buratino in Middle Park frame
Cox hoping for Kodi Celebration
Rock ready to roll at Windsor
Suzi's seeking Goodwood gold
Maarek aiming to fire in Bullet
Treble top for Weld and Smullen
Baker tempted by Woodbine for Bill
Memory poised for Haydock chance
Treve clash possible for Queen
Hills to make French Connection
Forgotten horse up for Irish Leger
Bear a necessity in Celebration
Pallasator in Cup mix at Doncaster
Lynam sprinters Flying first class
27 August 2015Tested passes with flying colours
Tested passes with flying colours
Iffranesia shoots for Bullet glory
Burke plots Reflection Ayr raid
Fascinating entry in Winter Hill
Thumbs-up at Ffos Las
Emotionless bound for Doncaster
Ground key to Rectifier run
Second inspection at Ffos Las
Whip ban for Mulrennan
Tryster in line for September clash
All systems go for Pendleton
Palmer firming up Covert mission
Safety first for Appleby
Stevens to end training career
Cumani content with Postponed work
Storm stars in Leger list
Irish Champion excites Glen camp
26 August 2015Spear Celebration 'highly unlikely'
Williams ponders Bullet plans
Barron belief in Bing
Salvo seeks solace at lower grade
'Laid-back' Erupt ready for action
Rain pain at Ffos Las
Take Cover back in Flying form
Bookmakers agree possible merger
Big-race targets on Marjurie agenda
Oppenheimer relaxed on Horn options
Bright future forecast for Wizard
Sea charts path to Treve clash
Epsom option for Berkshire
Ranger sights set on Bullet
Irish Leger option for Brave
Point plans up in the air
Ward retains Finnegan faith
25 August 2015Deauville date for Sumbal
Simenon team mull future plans
Surface switch for Lingfield heats
Brighton gets the go-ahead
Brighton gets the go-ahead
Three and easy for Godolphin
Pendleton poised for Ripon first
Euro chasing Breeders' dream
Acapulco back for more next year
Panther set for racecourse gallop
Maarek fired up for Beverley Bullet
Moyglare beckons for Now Or Never
Letters future excites O'Callaghan
Curragh aim for Goldream
Kodi in Celebration frame