London Stock Exchange welcomes Aptamer Group plc

London Stock Exchange today welcomes Aptamer Group plc (“Aptamer” or “the Group” or “the Company”), the developer of novel Optimer® binders to enable innovation in the life sciences industry, onto the AIM market. The Company has raised a total of c.£10.8 million at 117p per ordinary share and has joined AIM with a market capitalisation of c.£80.7 million. It will trade under the ticker ‘APTA’.

Aptamer is a leader in the provision of aptamer discovery and development services using its proprietary automated and high-throughput Optimer® platform. Aptamer operates across three life science sectors: custom services (research and bioprocessing tools), diagnostics and therapeutics. Over the past four years, Aptamer has seen organic revenue growth of 400% and developed a blue-chip customer base, having supplied or collaborated with 75% of the global top 20 pharmaceutical companies.

The Company solves intractable problems for biotech and big pharma by developing aptamer-based molecular binders, as an alternative to antibodies which fail to perform 50% - 60% of the time. Its scalable, automated platform allows rapid, reliable and high capacity binder discovery and development. The Group has developed novel, proprietary aptamer technology, known as Optimer® binders, which offer further performance and commercial benefits in addition to those of standard aptamers.

Incorporating three distinct aptamer selection methodologiestuned for different target types, the Optimer® platform offers a strong differentiator relative to its antibody and aptamer peers. Additionally, Aptamer’s platform avoids the need for animals in the discovery and development processes. Aptamer has key projects in development with multiple partners that could act to improve the delivery of therapeutics to the site-of-action, support the drug development pipeline to monitor drug quality and speed up key processes, improve the stability and reliability of diagnostic tests and enable innovative proteomic discovery platforms. 

Quick facts

Market: AIM
Instrument market cap (£m)
Listing/Admission to trading
22 Dec 2021

Arron Tolley, Chief Executive Officer of Aptamer Group, said:

“I’m immensely proud to join the AIM market today, which represents a pivotal moment for the whole team at Aptamer. We have worked for many years to develop our proprietary platform technology that is bringing new and improved solutions to clients across the life science industry. This funding will help us accelerate our growth, support the development of the business and gain market share in the affinity binder market."

“I’m pleased to welcome the new investors to the business and look forward to providing updates on our progress in the months and years ahead.”

Advisors to the IPO include:

  • Spark Advisory Partners, Nominated Advisor
  • Liberum Capital Limited, Sole Bookrunner and Broker
  • Jefferys Henry LLP, Reporting Accountant
  • Squire Patton Boggs, Lawyer to Company
  • Reed Smith LLP, Lawyer to the Nominated Advisor and Broker
  • Consilium Strategic Communications, Financial PR Advisor 

For more information on Aptamer Group, please visit or contact

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