2020: £538.4m


Adjusted operating profit1


2020: £87.1m


Adjusted operating margin1


2020: 16.2




2020 19.1%

1 Before acquisition related charges and acquisition related finance charges.

Highlights (PDF, 0.12MB)

Strong performance and progress

John Nicholas


John Nicholas Chairman
Chairman’s Statement (PDF, 0.18MB)

Building high-quality, scalable businesses for sustainable growth

Johnny Thomson


Johnny Thomson CEO
CEO Review (PDF, 0.34MB)

About Our Business

Diploma’s differentiated value-add distribution model has a long track record of success, delivering growth and sustainably high returns while having a positive impact on all our stakeholders.

Our Business Explained (PDF, 0.41MB)
Our business explained graph

Operating in fragmented markets, the Group still has very low market share. This means that we can grow by focusing on core developed markets and products, both organically and by acquisition, without being distracted elsewhere at higher risk.

Sustainable Growth (PDF, 0.05MB)
OSustainable Growth model graph

Acquisitions are an integral part of our strategy, with a focus on acquiring high-quality, value-add businesses to accelerate organic growth.

Acquisitions (PDF, 0.39MB)
Acquisitions graph

Sector Review

Specialised wiring, cable, connectors, fasteners, control devices and adhesives

Group Revenue


FY 2021 highlights

  • International Controls businesses +8% underlying, driven by end segment diversification and recovery in demand; underlying growth over FY 2019 by year end.
  • Outstanding Windy City Wire (“WCW”) performance – double-digit growth, market share gains and a well-invested platform delivering strong leverage.
  • Techsil acquisition in August adds exciting new business line in adhesives.
Sector Review: Controls (PDF, 0.30MB)

Seals, gaskets, cylinders, components and kits used in heavy mobile machinery and specialised industrial equipment.

Group Revenue


FY 2021 highlights

  • Underlying growth of 7%, building on a resilient FY 2020.
  • Well positioned for market share gains in North American Aftermarket, with transition to Louisville successfully completed.
  • Strategic acquisitions in North America and Australia building scalable platforms for growth.
Sector Review: Seals (PDF, 0.29MB)

Medical devices, consumables, instrumentation and related services to Healthcare and Environmental end markets.

Group Revenue


FY 2021 highlights

  • Strong underlying growth of 14%.
  • Build-out of European footprint provides diversification and growth opportunities.
  • Very positive performance from Scandinavian acquisitions.
  • Disciplined portfolio management: Q4 disposal of a1-CBISS.
Sector Review: Life Sciences (PDF, 0.18MB)