Trading Update & Notice of Results

Allergy Therapeutics plc

("Allergy Therapeutics" or the "Group")

 Trading Update & Notice of Results

Sales continue to grow strongly

Strong cash position sustained by good performance

16 January 2019 Allergy Therapeutics plc (AIM: AGY), the fully integrated commercial biotechnology company specialising in allergy immunology vaccines, today provides a trading update for the six months ended 31 December 2018 ahead of its Half Year Results to be announced on 6 March 2019.

Financials

The Group is trading in line with Board expectations. Reported revenues for the six months ended 31 December 2018 are expected to be £46.7m (2017: £42.2m) representing 10.6% growth on both a reported and constant currency basis. In terms of geography, the main contributors to this strong sales growth are Germany, Austria, Switzerland and Netherlands. Spain has continued to grow well despite the withdrawal of all bacterial products across the market. In terms of product mix, this growth is being driven primarily by the Group's ultra-short course, aluminium-free treatments (Pollinex and Pollinex Quattro) as well as Acarovac and Venomil. The Group continues to gain market share in Germany1 and again achieved number one position in this market for the month of October 2018 (the Group's busiest month of the year) for the second year running2.

The cash balance at the end of December 2018 was £31.6m (31 December 2017: £25.8m).

Regulatory

The Group continues to make good progress with the peanut allergy vaccine outsourced manufacturing scale up and the Acarovac Phase I trial for dust mite allergies. The first in-human trials for the Polyvac peanut product are expected to start in 2019, and data from the Acarovac Phase I trial is expected in H1 2019. As announced in December 2018, the top line results of the PQ Birch Phase III trial will be announced in Q1 2019. Meetings with the FDA and the German regulator, the Paul-Ehrlich-Institut (PEI), in relation to the PQ Grass trials are scheduled for Q1 2019.

Manuel Llobet, CEO at Allergy Therapeutics, stated: "This is another period of revenue growth and continued gain in market share for Allergy Therapeutics, in line with our mid and long-term strategy. The Group is also making good progress across its clinical pipeline, with a number of key developments anticipated for the first half of this year. We see momentum in the business and look forward to updating the market at our interim results."

1Insight Health Data November 2018

2 Insight Health Data October 2018

This announcement contains inside information for the purposes of Article 7 of Regulatory (EU) No596/2014.

- ENDS -

For further information, please contact:

Allergy Therapeutics

+44 (0) 1903 845 820

Manuel Llobet, Chief Executive Officer

Nick Wykeman, Chief Financial Officer

Panmure Gordon

+44 (0) 20 7886 2500

Freddy Crossley, Emma Earl, Corporate Finance

Erik Anderson, Corporate Broking

Consilium Strategic Communications

+44 20 3709 5700

Mary-Jane Elliott / David Daley / Nicholas Brown / Olivia Manser

allergytherapeutics@consilium-comms.com

Stern Investor Relations, Inc.

+1 212 362 1200

Christina Tartaglia

christina@sternir.com

Notes for editors:

About Allergy Therapeutics

Allergy Therapeutics is an international commercial biotechnology company focussed on the treatment and diagnosis of allergic disorders, including aluminium free immunotherapy vaccines that have the potential to cure disease. The Group sells proprietary and third-party products from its subsidiaries in nine major European countries and via distribution agreements in an additional ten countries. Its broad pipeline of products in clinical development include vaccines for grass, tree and house dust mite, and peanut allergy vaccine in pre-clinical development. Adjuvant systems to boost performance of vaccines outside allergy are also in development.

Formed in 1999 out of Smith Kline Beecham, Allergy Therapeutics is headquartered in Worthing, UK with more than 11,000m2 of state-of-the-art MHRA-approved manufacturing facilities and laboratories. The Group, which has achieved double digit compound annual growth since formation, employs c.500 employees and is listed on the London Stock Exchange (AIM:AGY). For more information, please see www.allergytherapeutics.com.