Shares of A.G. Barr, the Cumbernauld-based owner of Irn-Bru, Rubicon energy drinks, Boost Drinks and Funkin cocktail mixers, fell as much as 7% on Tuesday after it published a trading update for the 26 weeks ended August 1, 2026.

The firm said: “H1 26/27 revenue is expected to be c.£246m, c.8% up on the prior year (H1 25/26:  £228.1m) reflecting continued core brand growth and the contribution from recent acquisitions.  H1 operating margin is expected to be in the middle of the guidance range.

“Whilst pleased with our performance in the market in the period, as Q2 progressed, revenue was impacted by reduced stock availability, primarily from internal supply chain issues linked to our capability and capacity change programme, but also by external issues associated with third party manufacturing. 

“The revenue impact of the issues is estimated to be £10m in H1.

“Market share gains, encouraging innovation performance and supply chain actions give confidence of an improved revenue performance in H2. 

“As such, the Company is anticipating double-digit percentage revenue growth for the full year. The benefits from integration and insourcing actions underpin a strengthening operating margin in H2 and delivery of profit expectations for the full year.”

A.G. Barr CEO Euan Sutherland said: “During the first half of the year we made significant progress against our strategic priorities. 

“We completed the integrations of both Frobishers and Fentimans, continued to successfully drive our core brand propositions and made further progress with our manufacturing investment programme.

“Consumer demand for our brands is strong, with all core brands gaining market share. 

“The supply constraints which impacted Q2 performance are being resolved and, with strengthening trading momentum driven by our refreshed core brands and new product development, we remain confident for the full year.”