British device maker Halma’s shares slump on slower annual growth forecast

By Reuters | Updated: June 11, 2026

June 11 (Reuters) – British health and safety device maker Halma (HLMA.L), opens new tab forecast organic constant-currency revenue growth for fiscal ​2027 at a slower rate than the previous ‌year, sending its shares down nearly 15% on Thursday.

Here are a few details:

• The company expects to deliver low ​double-digit percentage organic revenue growth in constant ​currency for the 12-month period through March ⁠2027, compared with 16% organic growth in ​fiscal 2026.
• Halma’s growth has been driven by its photonics ​business, which uses light-based technology in sensors and monitoring systems, including for data centres, due to demand fuelled by ​the rapid expansion of AI.
• The company’s outlook ​includes growth of around five percentage points from the photonics ‌business, ⁠which JP Morgan analysts said would likely disappoint investors.
• Halma’s outlook suggested a deceleration in revenue growth for both the photonics business and the rest ​of the group, ​Morningstar analyst ⁠Matthew Donen said.
• Shares in FTSE 100-listed Halma were trading lower at 3,962 ​pence, as of 0825 GMT, making ​them ⁠the biggest laggards in the blue-chip index (.FTSE).
• For the year ended March 31, the company’s adjusted pretax profit ⁠rose ​23% to £564.5 million ($755.2 million).

($1 = £0.7474)

Reporting by Neeshita Beura ​in Bengaluru; Editing by Rashmi Aich and Sherry Jacob-Phillips

© Thomson Reuters 2026