Nimax Theatres Ltd. is a theatre group owned and operated by Nica Burns and Max Weitzenhoffer.  In July 2005, Weitzenhoffer and Burns announced they were forming Nimax to buy four of London’s playhouses from Andrew Lloyd Webber, namely the Apollo Theatre, Garrick Theatre, Duchess Theatre and Lyric Theatre, taking control the following October.  Additionally, Weitzenhoffer had already owned the Vaudeville Theatre since January 2001; it was transferred in September 2005 to the newly formed company.
In April 2012, Nimax purchased the Palace Theatre from Lloyd Webber. 
In Autumn 2022, Nimax opened @sohoplace, the first newly-built West End theatre to open in 50 years 
The group owns and operates seven West End theatres:
The Palace Theatre is a West End theatre in the City of Westminster in London. Its red-brick facade dominates the west side of Cambridge Circus behind a small plaza near the intersection of Shaftesbury Avenue and Charing Cross Road. The Palace Theatre seats 1,400.
The Shubert Organization is a theatrical producing organization and a major owner of theatres based in Manhattan, New York City. It was founded by the three Shubert brothers in the late 19th century. They steadily expanded, owning many theaters in New York and across the country. Since then it has gone through changes of ownership, but is still a major theater chain.
West End theatre is mainstream professional theatre staged in the large theatres in and near the West End of London. Along with New York City's Broadway theatre, West End theatre is usually considered to represent the highest level of commercial theatre in the English-speaking world. Seeing a West End show is a common tourist activity in London. Famous screen actors, British and international alike, frequently appear on the London stage.
The Really Useful Group Ltd. (RUG) is an international company set up in 1977 by Andrew Lloyd Webber. It is involved in theatre, film, television, video and concert productions, merchandising, magazine publishing, records and music publishing. The name is inspired by a phrase from the children's book series The Railway Series in which Thomas the Tank Engine and other locomotives are referred to as "Really Useful Engines".
The Apollo Theatre is a Grade II listed West End theatre on Shaftesbury Avenue in the City of Westminster, in central London. Designed by the architect Lewin Sharp for owner Henry Lowenfeld, it became the fourth legitimate theatre to be constructed on the street when it opened its doors on 21 February 1901, with the American musical comedy The Belle of Bohemia.
The Vaudeville Theatre is a West End theatre on the Strand in the City of Westminster. As the name suggests, the theatre held mostly vaudeville shows and musical revues in its early days. It opened in 1870 and was rebuilt twice, although each new building retained elements of the previous structure. The current building opened in 1926, and the capacity is now 690 seats. Rare thunder drum and lightning sheets, together with other early stage mechanisms, survive in the theatre.
The Duchess Theatre is a West End theatre in the City of Westminster, London, located in Catherine Street near Aldwych.
The Garrick Theatre is a West End theatre, located in Charing Cross Road, in the City of Westminster, named after the stage actor David Garrick. It opened in 1889 with The Profligate, a play by Arthur Wing Pinero, and another Pinero play, The Notorious Mrs. Ebbsmith, was an early success at the theatre. In its early years, the Garrick appears to have specialised in the performance of melodrama. The theatre later became associated with comedies, including No Sex Please, We're British, which played for four years from 1982 to 1986.
The Lyric Theatre is a Broadway theater at 214 West 43rd Street in the Theater District of Midtown Manhattan in New York City. Opened in 1998, the theater was designed by Richard Lewis Blinder of Beyer Blinder Belle, in collaboration with Peter Kofman, for Garth Drabinsky and his company Livent. The Lyric Theatre was built using parts of two former theaters on the site: the Apollo Theatre, built in 1920 to a design by Eugene De Rosa, and the old Lyric Theatre, built in 1903 to a design by Victor Hugo Koehler. The theater contains 1,622 seats across three levels and is operated by Ambassador Theatre Group (ATG). The theater building is owned by the city and state governments of New York and was developed by New 42nd Street.
The James M. Nederlander Theatre is a theater located at 24 West Randolph Street in the Loop area of downtown Chicago, Illinois. Previously known as the Oriental Theatre, it opened in 1926 as a deluxe movie palace and vaudeville venue. Today the Nederlander presents live Broadway theater and is operated by Broadway In Chicago, currently seating 2,253.
Thelma Holt is a British theatre producer and former actress.
Dianne Lesley Pilkington is an English theatre actress and singer.
Fascinating Aïda is a British comedy singing group and satirical cabaret act founded in March 1983. The line-up consists of founder member Dillie Keane; Adèle Anderson, who joined in 1984; and Liza Pulman, who first joined in 2004.
Lounica Maureen Patricia "Nica" Burns OBE is a London theatre producer and co-owner with her business partner Max Weitzenhoffer of the Nimax Theatres group, comprising six West End theatres: the Palace, Lyric, Apollo, Garrick, Vaudeville and Duchess.
Gareth Owen is a multiple Olivier & Tony Award-winning sound designer specialising in musical theatre in London's West End, on Broadway and internationally.
The Other Palace is a theatre in London's Off West End which opened on 18 September 2012 as the St. James Theatre. It features a 312-seat main theatre and a 120-seat studio theatre. It was built on the site of the former Westminster Theatre, which was damaged by a fire in 2002 and subsequently demolished. It was owned by Andrew Lloyd Webber's Really Useful Theatres Group from 2016 to 2021, which gave it its current name.
The WhatsOnStage Awards, founded in 2001 as the Theatregoers' Choice Awards, are a fan-driven set of awards organised by the theatre website WhatsOnStage.com, based on a popular vote recognising performers and productions of English theatre, with an emphasis on London's West End theatre.
Mischief Theatre is a British theatre company founded in 2008 by a group of students from the London Academy of Music and Dramatic Art in West London, and directed by Henry Lewis, Jonathan Sayer, and Henry Shields. The group originally began by doing improvised comedy shows, but by 2012 they expanded into comedic theatrical performances that includes choreographed routines, jokes, and stunts.
Anna O'Byrne is an Australian actress and soprano singer best known for her portrayal of Christine Daaé in Andrew Lloyd Webber's The Phantom of the Opera and the original Australian production of Lloyd Webber's sequel, Love Never Dies, for which she was nominated for a Green Room Award.
@sohoplace is a West End theatre operated by Nimax Theatres. It is on the site of the previous London Astoria, as part of development around the Elizabeth line's Tottenham Court Road station. It is the first purpose-built West End theatre to be opened in 50 years. It opened on 15 October 2022, with a production of the play Marvellous.