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ATG (Auction Technology Group)
https://www.auctiontechnologygroup.com/Last activity: 28.01.2026
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A global technology company with over 250 employees, and headquarters in London Bridge, ATG is transforming the way billions of pounds, euros and dollars worth of items are bought and sold globally via auction.
We operate the world’s leading marketplaces for curated online auctions, seamlessly connecting bidders from around the world to trusted auctioneers across three major sectors: industrial & commercial equipment, art & antiques, and consumer surplus and retail returns.
ATG has been supporting the auction house industry since 1971 when it first published the Antiques Trade Gazette. With leading positions in the UK, the US and Germany, ATG is a key partner to auctioneers, reaching bidders in 150 countries. We provide leading online marketplace capabilities, and a range of value-added tools and services that maximise value on lots sold and increase efficiency.
ATG’s marketplaces include:
• thesaleroom.com - Europe's leading marketplace for fine art & antiques auctions.
• proxibid.com - the largest online auction marketplace in North America, listing highly valued items across 16 categories from agricultural machinery to classic cars.
• i-bidder.com - the UK’s leading auction marketplace for returned and surplus consumer product.
• BidSpotter.com and BidSpotter.co.uk – the world leaders in industrial online auctions. Together the sites provide a world-leading marketplace for industrial, manufacturing and food processing equipment auctions.
• lot-tissimo.com - Germany's foremost fine art & antiques marketplace.
ATG’s digital marketplaces are powered by its proprietary auction technology to provide a cloud-based content management system for auctioneers. We are the world leader hosting more than 30,000 live and timed auctions across multiple marketplaces each day, with real-time audio and video broadcast.
We operate the world’s leading marketplaces for curated online auctions, seamlessly connecting bidders from around the world to trusted auctioneers across three major sectors: industrial & commercial equipment, art & antiques, and consumer surplus and retail returns.
ATG has been supporting the auction house industry since 1971 when it first published the Antiques Trade Gazette. With leading positions in the UK, the US and Germany, ATG is a key partner to auctioneers, reaching bidders in 150 countries. We provide leading online marketplace capabilities, and a range of value-added tools and services that maximise value on lots sold and increase efficiency.
ATG’s marketplaces include:
• thesaleroom.com - Europe's leading marketplace for fine art & antiques auctions.
• proxibid.com - the largest online auction marketplace in North America, listing highly valued items across 16 categories from agricultural machinery to classic cars.
• i-bidder.com - the UK’s leading auction marketplace for returned and surplus consumer product.
• BidSpotter.com and BidSpotter.co.uk – the world leaders in industrial online auctions. Together the sites provide a world-leading marketplace for industrial, manufacturing and food processing equipment auctions.
• lot-tissimo.com - Germany's foremost fine art & antiques marketplace.
ATG’s digital marketplaces are powered by its proprietary auction technology to provide a cloud-based content management system for auctioneers. We are the world leader hosting more than 30,000 live and timed auctions across multiple marketplaces each day, with real-time audio and video broadcast.
Location: United Kingdom
Employees: 201-500
Founded date: 1971
Investors 1
| Date | Name | Website |
| - | ECI Partne... | ecipartner... |
Mentions in press and media 5
| Date | Title | Description |
| 28.01.2026 | Closing the bidding: Fitzwalter tables final offer for Auction Tech | Fitzwalter has made one final play to snap up Auction Technology Group as tensions flare between the two firms over the Investment giant’s 12 takeover attempts. The London-headquartered investor tabled a 400p per share cash proposal, which ... |
| 12.01.2026 | ‘Extreme shareholder destruction’: Fitzwalter dials up assault on Auction Technology Group | Auction Technology Group management have been accused of overseeing a period of “extreme shareholder destruction” by its largest shareholder, in the latest salvo of a feud that has seen the auction platform provider rebuff 11 takeover appro... |
| 06.01.2026 | Invesco Ltd: Form 8.3 - Auction Technology Group PLC; Opening Position disclosure | Invesco Ltd: Form 8.3 - Auction Technology Group PLC; Opening Position disclosure Tue, Jan 06, 2026 13:09 CET Report this content FORM 8.3 OPENING POSITION DISCLOSURE BY A PERSON WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR MORE... |
| 05.01.2026 | Auction Tech fends off 11 takeover bids from largest shareholder | Digital marketplace Auction Technology Group has fended off 11 hostile takeover bids from its largest shareholder. The London-listed tech firm said on Monday it had dismissed the latest offer from investment giant FitzWalter Capital, which ... |
| 14.02.2020 | TA Associates Acquires Auction Technology Group and Proxibid | TA Associates, a global growth private equity firm, acquired Auction Technology Group, an online platform for auctions across Europe and the United States, from ECI Partners, and Proxibid, an online marketplace for connecting buyers and sel... |