- Carlton Lawn Tennis Club
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- Carmarthen Quins RFC U10s
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- Carol Anne Netball Club
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- Carol Rogers raising for Isabel Hospice
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- Caroline Blackburn's London Marathon for Brain Research UK
- Caroline Chisholm School, Wootton
- Caroline Fisher, Travelling To Nepal With World Challenge
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- Caroline Oliver School of Dance
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- Carolside Nursery Parent Fundraising Association - Glasgow
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- Carolyn Tilley LLHM 2019 in aid of Tommy's
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- Carousel
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- Carpenter Box Charitable Foundation
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- Carrickfergus Hub Improving Lives Locally (CHILL)
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- Carrickfergus and Larne Child Contact Centre
- Carrickmore Primary School HSA
- Carrie Bradbury fundraising for PICU Saint Mary's
- Carrie Pratt - Sue Needs Your Help!
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- Carrington Infant & Junior Schools PTA - Flackwell Heath
- Carrington Primary And Nursery School, Nottingham
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- Carrow Hockey Club
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- Carrowdore Primary School, Newtownards
- Carrowreagh Primary School PTA - Ballymoney
- Carrs Lane Conference Centre
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- Carrutherstown Primary
- Carry On Mini Mini Club
- Carryduff GAC
- Carryduff Parish Church, Belfast
- Cars FC
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- Carshalton Athletic FC U8 Whites & U11 Reds
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- Carshalton Athletic Independent Supporters Club
- Carshalton Athletic U12 Girls
- Carshalton Bowling Club - Paul Maurice Songer
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- Carshalton College
- Carshalton High School for Girls
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- Carsington And Hopton Primary School, Derbyshire
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- Carters Journey
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- Carterton Bowls Club
- Carterton Community College
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- Carterton FC
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- Carter’s Sunflowers CIC Charity of the Year
- Cartha Girls Rugby
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- Cartway Church - Bridgnorth
- Cartwheel Arts
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- Carus's Uni Fund
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- Carwyn Hastings - UK Three Peaks 2022
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- Cary Comedians Carnival Club
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- Cary Park Junior Tennis Club
- Cary Rangers Netball Club
- Cary Rangers Netball Club 2018
- Carymoor Environmental Trust
- Casa Alianza UK
- Casa Dei Bambini Montessori
- Casa Montessori, Totnes
- Casa de Griffon
- Casa dei Bambini Nursery
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- Casablanca Cosmic 5 And Halo Fundraising
- Casablanca Worlds Programme
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- Case Training Services - Hull
- Casella
- Casey Walker - 2021
- Casey's Childminding
- Cash For Kids - Cycle Madagascar 2015 - Emily Cooper
- Cashback
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- Cashes Green Community Centre
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- Caskieberran Primary School and Nursery
- Caspari Foundation
- Casper Elder - Camps International Costa Rica 2020
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- Caspian Horse Society
- Caspian One Limited for "Julia's House" - Yana Gardner
- Cass and Friends
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- Cassie marriott 2021
- Cassiltoun Stables Nursery
- Cassio Pre-school - Watford
- Cassiobury Infant and Nursery School
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- Cast (Doncaster Performance Limited)
- Cast A Thought
- Cast Productions Yorkshire Limited Performing Arts Academy
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- Castellan African Trust
- Castellers Of London
- Castelnau Centre Project
- Castercliff Primary Academy PTA, Nelson
- Casterton Childcare Centre
- Castilion Future Builders
- Casting Couch Theatre Company Ltd
- Castle Academy Primary School
- Castle Acre Swifts FC
- Castle Bar FC
- Castle Bromwich Alliance
- Castle Bromwich Bells
- Castle Bromwich Infants and Nursery
- Castle Bromwich Lions Charitable Trust Fund
- Castle Bromwich Lions FC u7
- Castle Bromwich United Football Club
- Castle Bromwich Youth & Community Partnership
- Castle Bytham Village Hall
- Castle Camps Pre-School - Cambridgeshire
- Castle Carrock PTFA Brampton
- Castle Cary Carers
- Castle Cary Cricket Club
- Castle Cary Methodist Church
- Castle Cary Primary School PTFA
- Castle Cary RFC
- Castle Church Growth Trust
- Castle Colts FC
- Castle Combe Colts FC
- Castle Donington Rangers
- Castle Douglas Development Forum
- Castle Douglas Men’s Shed
- Castle Douglas Playgroup
- Castle Douglas Primary Learning Centre
- Castle Douglas Primary and ELCC (Nursery)
- Castle Eden Methodist Circuit
- Castle Farm Sixth Form: Tanzania 2014 - Alice Phillips
- Castle Fields Pre-school
- Castle Furniture Project
- Castle Gate
- Castle Grove Gymnastics Club
- Castle Hedingham Bowls Club
- Castle Hedingham Cricket Club
- Castle Hedingham Scout Group
- Castle Hedingham Tennis Club
- Castle Hill High School - Stockport
- Castle Hill Infant and Junior School Ipswich - PTA
- Castle Hill Pre-School - Basingstoke
- Castle Hill Primary School - Basingstoke
- Castle Hill Primary School, Bolton
- Castle Hill Primary School, Brockworth
- Castle Hill School - Huddersfield
- Castle Hockey Club
- Castle House Museum
- Castle House School, Newport Shrops
- Castle Juniors 2016
- Castle Juniors Football Club
- Castle Kennedy Primary School PTA
- Castle Korfball Club
- Castle Loch Lochmaben Community Trust
- Castle Lodge Care Home Comfort Fund
- Castle Manor Academy - Suffolk
- Castle Mead Academy, Leicester
- Castle Mead School - Trowbridge
- Castle Newnham School PTA
- Castle Nursery School - Kenilworth
- Castle Park Arts Centre
- Castle Park Juniors
- Castle Point Association of Voluntary Services Children's Services
- Castle Point Bowling Club
- Castle Point Joggers
- Castle Point Social Car Scheme
- Castle Pre-School Broughton & North Newington
- Castle Pre-School ltd - Portsmouth
- Castle Rowing Club
- Castle Roy Trust
- Castle School - Cambridge
- Castle School Friends - Thornbury
- Castle School South Africa & Lesotho 2026 - Kira Pogrebnova
- Castle School South Africa Trip - Elise Veale
- Castle School World Challenge - Dixsa Purgas-O'Sullivan
- Castle Semple Rowing Club
- Castle Semple Sailing Club
- Castle Street Centre Association
- Castle Street Dance Studios
- Castle Tavern FC
- Castle United
- Castle Vale Olympic
- Castle Vale Spitfires FC
- Castle Vale Town FC
- Castle Vale Town Ladies FC
- Castle View School - Essex
- Castle View Stables
- Castle Youth Football Club
- Castlebrook High School
- Castlechurch Primary School
- Castlecombe Primary School - Mottingham
- Castlecroft FC
- Castlecroft Residents Association
- Castledon Greyhound Rescue
- Castledyke Primary School, Barton-upon-Humber
- Castlefield Dog Rescue
- Castlefield School Fund - High Wycombe
- Castlefield School PTA ,High Wycombe
- Castleford All Stars Community Gymnastics Club
- Castleford Boxing Academy
- Castleford Cancer Self Help Group
- Castleford Comets Junior Netball Club
- Castleford Comets Netball Club
- Castleford Cricket Club
- Castleford Hedgehog Rescue
- Castleford Heritage Trust
- Castleford Panthers Rugby Club
- Castleford Panthers Under 9's Rugby League Team
- Castleford Phoenix Theatre
- Castleford RUFC
- Castleford Sea Cadets
- Castleford Team Parish
- Castleford Town 13's Football Club
- Castleford Town Bowling Club
- Castleford Town Girls JFC u7s
- Castleford White Rose Ladies
- Castleford YMCA
- Castleford Young Musicians
- Castlegate Care Home
- Castlehaven Community Association
- Castlehill Primary School - Glasgow
- Castlehill School Association - Cupar
- Castlehold Baptist Church
- Castlemartin Village Hall - Pembroke
- Castlemilk Community Transport
- Castlemilk Day Nursery
- Castlemilk Parish Church
- Castlemilk Youth Complex
- Castlemorton Primary School Friends
- Castlereagh Spartans Ice Hockey Club
- Castlerigg Manor
- Castlerock Scout Group
- Castleside Horse & Groom FC
- Castleside Primary School
- Castleside Village Hall
- Castlethorpe & Hanslope Community First Responders
- Castleton Bowling Club
- Castleton High Peak Womens Institute
- Castleton Primary School Rochdale PTA
- Castleton Primary School, Leeds
- Castletown Athletic Jfc
- Castletown Community Project
- Castletown Cricket Club
- Castletown Football Club
- Castletown Hockey Club
- Castletown Lawn Tennis Club
- Castletown Scouts
- Castletown juniors u9’s - Penrith
- Castleview Primary Nursery Class - Edinburgh
- Castleview Primary Parents and Carers - Stirling
- Castleview Primary School - Lancaster
- Castleview School, Slough
- Castlewellan Community Playgroup
- Castlewellan Town FC
- Castlewood Primary School - Horsham
- Caston Village Hall Charitable Trust
- Castor & Ailsworth Cricket Club
- Castor & Ailsworth St Kyneburgha PCC
- Castor & Ailsworth Tennis Club
- Castor & Ailsworth Village Hall
- Castor and Ailsworth Pre-School
- Casual Minds Matter CIC
- Casus Pax
- Cat & Rabbit Rescue Centre - Sidlesham
- Cat Action Trust (Pembrokeshire Branch)